yading@11: /*
yading@11:  * various utility functions for use within FFmpeg
yading@11:  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: /* #define DEBUG */
yading@11: 
yading@11: #include "avformat.h"
yading@11: #include "avio_internal.h"
yading@11: #include "internal.h"
yading@11: #include "libavcodec/internal.h"
yading@11: #include "libavcodec/raw.h"
yading@11: #include "libavcodec/bytestream.h"
yading@11: #include "libavutil/avassert.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "libavutil/dict.h"
yading@11: #include "libavutil/pixdesc.h"
yading@11: #include "metadata.h"
yading@11: #include "id3v2.h"
yading@11: #include "libavutil/avassert.h"
yading@11: #include "libavutil/avstring.h"
yading@11: #include "libavutil/mathematics.h"
yading@11: #include "libavutil/parseutils.h"
yading@11: #include "libavutil/time.h"
yading@11: #include "libavutil/timestamp.h"
yading@11: #include "riff.h"
yading@11: #include "audiointerleave.h"
yading@11: #include "url.h"
yading@11: #include <stdarg.h>
yading@11: #if CONFIG_NETWORK
yading@11: #include "network.h"
yading@11: #endif
yading@11: 
yading@11: #undef NDEBUG
yading@11: #include <assert.h>
yading@11: 
yading@11: /**
yading@11:  * @file
yading@11:  * various utility functions for use within FFmpeg
yading@11:  */
yading@11: 
yading@11: unsigned avformat_version(void)
yading@11: {
yading@11:     av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
yading@11:     return LIBAVFORMAT_VERSION_INT;
yading@11: }
yading@11: 
yading@11: const char *avformat_configuration(void)
yading@11: {
yading@11:     return FFMPEG_CONFIGURATION;
yading@11: }
yading@11: 
yading@11: const char *avformat_license(void)
yading@11: {
yading@11: #define LICENSE_PREFIX "libavformat license: "
yading@11:     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
yading@11: }
yading@11: 
yading@11: #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
yading@11: 
yading@11: static int is_relative(int64_t ts) {
yading@11:     return ts > (RELATIVE_TS_BASE - (1LL<<48));
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Wrap a given time stamp, if there is an indication for an overflow
yading@11:  *
yading@11:  * @param st stream
yading@11:  * @param timestamp the time stamp to wrap
yading@11:  * @return resulting time stamp
yading@11:  */
yading@11: static int64_t wrap_timestamp(AVStream *st, int64_t timestamp)
yading@11: {
yading@11:     if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE &&
yading@11:         st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
yading@11:         if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET &&
yading@11:             timestamp < st->pts_wrap_reference)
yading@11:             return timestamp + (1ULL<<st->pts_wrap_bits);
yading@11:         else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
yading@11:             timestamp >= st->pts_wrap_reference)
yading@11:             return timestamp - (1ULL<<st->pts_wrap_bits);
yading@11:     }
yading@11:     return timestamp;
yading@11: }
yading@11: 
yading@11: #define MAKE_ACCESSORS(str, name, type, field) \
yading@11:     type av_##name##_get_##field(const str *s) { return s->field; } \
yading@11:     void av_##name##_set_##field(str *s, type v) { s->field = v; }
yading@11: 
yading@11: MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
yading@11: 
yading@11: /** head of registered input format linked list */
yading@11: static AVInputFormat *first_iformat = NULL;
yading@11: /** head of registered output format linked list */
yading@11: static AVOutputFormat *first_oformat = NULL;
yading@11: 
yading@11: AVInputFormat  *av_iformat_next(AVInputFormat  *f)
yading@11: {
yading@11:     if(f) return f->next;
yading@11:     else  return first_iformat;
yading@11: }
yading@11: 
yading@11: AVOutputFormat *av_oformat_next(AVOutputFormat *f)
yading@11: {
yading@11:     if(f) return f->next;
yading@11:     else  return first_oformat;
yading@11: }
yading@11: 
yading@11: void av_register_input_format(AVInputFormat *format)
yading@11: {
yading@11:     AVInputFormat **p;
yading@11:     p = &first_iformat;
yading@11:     while (*p != NULL) p = &(*p)->next;
yading@11:     *p = format;
yading@11:     format->next = NULL;
yading@11: }
yading@11: 
yading@11: void av_register_output_format(AVOutputFormat *format)
yading@11: {
yading@11:     AVOutputFormat **p;
yading@11:     p = &first_oformat;
yading@11:     while (*p != NULL) p = &(*p)->next;
yading@11:     *p = format;
yading@11:     format->next = NULL;
yading@11: }
yading@11: 
yading@11: int av_match_ext(const char *filename, const char *extensions)
yading@11: {
yading@11:     const char *ext, *p;
yading@11:     char ext1[32], *q;
yading@11: 
yading@11:     if(!filename)
yading@11:         return 0;
yading@11: 
yading@11:     ext = strrchr(filename, '.');
yading@11:     if (ext) {
yading@11:         ext++;
yading@11:         p = extensions;
yading@11:         for(;;) {
yading@11:             q = ext1;
yading@11:             while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
yading@11:                 *q++ = *p++;
yading@11:             *q = '\0';
yading@11:             if (!av_strcasecmp(ext1, ext))
yading@11:                 return 1;
yading@11:             if (*p == '\0')
yading@11:                 break;
yading@11:             p++;
yading@11:         }
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int match_format(const char *name, const char *names)
yading@11: {
yading@11:     const char *p;
yading@11:     int len, namelen;
yading@11: 
yading@11:     if (!name || !names)
yading@11:         return 0;
yading@11: 
yading@11:     namelen = strlen(name);
yading@11:     while ((p = strchr(names, ','))) {
yading@11:         len = FFMAX(p - names, namelen);
yading@11:         if (!av_strncasecmp(name, names, len))
yading@11:             return 1;
yading@11:         names = p+1;
yading@11:     }
yading@11:     return !av_strcasecmp(name, names);
yading@11: }
yading@11: 
yading@11: AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
yading@11:                                 const char *mime_type)
yading@11: {
yading@11:     AVOutputFormat *fmt = NULL, *fmt_found;
yading@11:     int score_max, score;
yading@11: 
yading@11:     /* specific test for image sequences */
yading@11: #if CONFIG_IMAGE2_MUXER
yading@11:     if (!short_name && filename &&
yading@11:         av_filename_number_test(filename) &&
yading@11:         ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
yading@11:         return av_guess_format("image2", NULL, NULL);
yading@11:     }
yading@11: #endif
yading@11:     /* Find the proper file type. */
yading@11:     fmt_found = NULL;
yading@11:     score_max = 0;
yading@11:     while ((fmt = av_oformat_next(fmt))) {
yading@11:         score = 0;
yading@11:         if (fmt->name && short_name && match_format(short_name, fmt->name))
yading@11:             score += 100;
yading@11:         if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
yading@11:             score += 10;
yading@11:         if (filename && fmt->extensions &&
yading@11:             av_match_ext(filename, fmt->extensions)) {
yading@11:             score += 5;
yading@11:         }
yading@11:         if (score > score_max) {
yading@11:             score_max = score;
yading@11:             fmt_found = fmt;
yading@11:         }
yading@11:     }
yading@11:     return fmt_found;
yading@11: }
yading@11: 
yading@11: enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
yading@11:                             const char *filename, const char *mime_type, enum AVMediaType type){
yading@11:     if (!strcmp(fmt->name, "segment") || !strcmp(fmt->name, "ssegment")) {
yading@11:         fmt = av_guess_format(NULL, filename, NULL);
yading@11:     }
yading@11: 
yading@11:     if(type == AVMEDIA_TYPE_VIDEO){
yading@11:         enum AVCodecID codec_id= AV_CODEC_ID_NONE;
yading@11: 
yading@11: #if CONFIG_IMAGE2_MUXER
yading@11:         if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
yading@11:             codec_id= ff_guess_image2_codec(filename);
yading@11:         }
yading@11: #endif
yading@11:         if(codec_id == AV_CODEC_ID_NONE)
yading@11:             codec_id= fmt->video_codec;
yading@11:         return codec_id;
yading@11:     }else if(type == AVMEDIA_TYPE_AUDIO)
yading@11:         return fmt->audio_codec;
yading@11:     else if (type == AVMEDIA_TYPE_SUBTITLE)
yading@11:         return fmt->subtitle_codec;
yading@11:     else
yading@11:         return AV_CODEC_ID_NONE;
yading@11: }
yading@11: 
yading@11: AVInputFormat *av_find_input_format(const char *short_name)
yading@11: {
yading@11:     AVInputFormat *fmt = NULL;
yading@11:     while ((fmt = av_iformat_next(fmt))) {
yading@11:         if (match_format(short_name, fmt->name))
yading@11:             return fmt;
yading@11:     }
yading@11:     return NULL;
yading@11: }
yading@11: 
yading@11: /* an arbitrarily chosen "sane" max packet size -- 50M */
yading@11: #define SANE_CHUNK_SIZE (50000000)
yading@11: 
yading@11: int ffio_limit(AVIOContext *s, int size)
yading@11: {
yading@11:     if(s->maxsize>=0){
yading@11:         int64_t remaining= s->maxsize - avio_tell(s);
yading@11:         if(remaining < size){
yading@11:             int64_t newsize= avio_size(s);
yading@11:             if(!s->maxsize || s->maxsize<newsize)
yading@11:                 s->maxsize= newsize - !newsize;
yading@11:             remaining= s->maxsize - avio_tell(s);
yading@11:             remaining= FFMAX(remaining, 0);
yading@11:         }
yading@11: 
yading@11:         if(s->maxsize>=0 && remaining+1 < size){
yading@11:             av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
yading@11:             size= remaining+1;
yading@11:         }
yading@11:     }
yading@11:     return size;
yading@11: }
yading@11: 
yading@11: /*
yading@11:  * Read the data in sane-sized chunks and append to pkt.
yading@11:  * Return the number of bytes read or an error.
yading@11:  */
yading@11: static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
yading@11: {
yading@11:     int orig_pos       = pkt->pos; // av_grow_packet might reset pos
yading@11:     int orig_size      = pkt->size;
yading@11:     int ret;
yading@11: 
yading@11:     do {
yading@11:         int prev_size = pkt->size;
yading@11:         int read_size;
yading@11: 
yading@11:         /*
yading@11:          * When the caller requests a lot of data, limit it to the amount left
yading@11:          * in file or SANE_CHUNK_SIZE when it is not known
yading@11:          */
yading@11:         read_size = size;
yading@11:         if (read_size > SANE_CHUNK_SIZE/10) {
yading@11:             read_size = ffio_limit(s, read_size);
yading@11:             // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
yading@11:             if (s->maxsize < 0)
yading@11:                 read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
yading@11:         }
yading@11: 
yading@11:         ret = av_grow_packet(pkt, read_size);
yading@11:         if (ret < 0)
yading@11:             break;
yading@11: 
yading@11:         ret = avio_read(s, pkt->data + prev_size, read_size);
yading@11:         if (ret != read_size) {
yading@11:             av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
yading@11:             break;
yading@11:         }
yading@11: 
yading@11:         size -= read_size;
yading@11:     } while (size > 0);
yading@11:     if (size > 0)
yading@11:         pkt->flags |= AV_PKT_FLAG_CORRUPT;
yading@11: 
yading@11:     pkt->pos = orig_pos;
yading@11:     if (!pkt->size)
yading@11:         av_free_packet(pkt);
yading@11:     return pkt->size > orig_size ? pkt->size - orig_size : ret;
yading@11: }
yading@11: 
yading@11: int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
yading@11: {
yading@11:     av_init_packet(pkt);
yading@11:     pkt->data = NULL;
yading@11:     pkt->size = 0;
yading@11:     pkt->pos  = avio_tell(s);
yading@11: 
yading@11:     return append_packet_chunked(s, pkt, size);
yading@11: }
yading@11: 
yading@11: int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
yading@11: {
yading@11:     if (!pkt->size)
yading@11:         return av_get_packet(s, pkt, size);
yading@11:     return append_packet_chunked(s, pkt, size);
yading@11: }
yading@11: 
yading@11: 
yading@11: int av_filename_number_test(const char *filename)
yading@11: {
yading@11:     char buf[1024];
yading@11:     return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
yading@11: }
yading@11: 
yading@11: AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
yading@11: {
yading@11:     AVProbeData lpd = *pd;
yading@11:     AVInputFormat *fmt1 = NULL, *fmt;
yading@11:     int score, nodat = 0, score_max=0;
yading@11:     const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
yading@11: 
yading@11:     if (!lpd.buf)
yading@11:         lpd.buf = zerobuffer;
yading@11: 
yading@11:     if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
yading@11:         int id3len = ff_id3v2_tag_len(lpd.buf);
yading@11:         if (lpd.buf_size > id3len + 16) {
yading@11:             lpd.buf += id3len;
yading@11:             lpd.buf_size -= id3len;
yading@11:         }else
yading@11:             nodat = 1;
yading@11:     }
yading@11: 
yading@11:     fmt = NULL;
yading@11:     while ((fmt1 = av_iformat_next(fmt1))) {
yading@11:         if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
yading@11:             continue;
yading@11:         score = 0;
yading@11:         if (fmt1->read_probe) {
yading@11:             score = fmt1->read_probe(&lpd);
yading@11:             if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
yading@11:                 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
yading@11:         } else if (fmt1->extensions) {
yading@11:             if (av_match_ext(lpd.filename, fmt1->extensions)) {
yading@11:                 score = 50;
yading@11:             }
yading@11:         }
yading@11:         if (score > score_max) {
yading@11:             score_max = score;
yading@11:             fmt = fmt1;
yading@11:         }else if (score == score_max)
yading@11:             fmt = NULL;
yading@11:     }
yading@11:     if(nodat)
yading@11:         score_max = FFMIN(AVPROBE_SCORE_MAX/4-1, score_max);
yading@11:     *score_ret= score_max;
yading@11: 
yading@11:     return fmt;
yading@11: }
yading@11: 
yading@11: AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
yading@11: {
yading@11:     int score_ret;
yading@11:     AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
yading@11:     if(score_ret > *score_max){
yading@11:         *score_max= score_ret;
yading@11:         return fmt;
yading@11:     }else
yading@11:         return NULL;
yading@11: }
yading@11: 
yading@11: AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
yading@11:     int score=0;
yading@11:     return av_probe_input_format2(pd, is_opened, &score);
yading@11: }
yading@11: 
yading@11: static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
yading@11: {
yading@11:     static const struct {
yading@11:         const char *name; enum AVCodecID id; enum AVMediaType type;
yading@11:     } fmt_id_type[] = {
yading@11:         { "aac"      , AV_CODEC_ID_AAC       , AVMEDIA_TYPE_AUDIO },
yading@11:         { "ac3"      , AV_CODEC_ID_AC3       , AVMEDIA_TYPE_AUDIO },
yading@11:         { "dts"      , AV_CODEC_ID_DTS       , AVMEDIA_TYPE_AUDIO },
yading@11:         { "eac3"     , AV_CODEC_ID_EAC3      , AVMEDIA_TYPE_AUDIO },
yading@11:         { "h264"     , AV_CODEC_ID_H264      , AVMEDIA_TYPE_VIDEO },
yading@11:         { "loas"     , AV_CODEC_ID_AAC_LATM  , AVMEDIA_TYPE_AUDIO },
yading@11:         { "m4v"      , AV_CODEC_ID_MPEG4     , AVMEDIA_TYPE_VIDEO },
yading@11:         { "mp3"      , AV_CODEC_ID_MP3       , AVMEDIA_TYPE_AUDIO },
yading@11:         { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
yading@11:         { 0 }
yading@11:     };
yading@11:     int score;
yading@11:     AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
yading@11: 
yading@11:     if (fmt && st->request_probe <= score) {
yading@11:         int i;
yading@11:         av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
yading@11:                pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
yading@11:         for (i = 0; fmt_id_type[i].name; i++) {
yading@11:             if (!strcmp(fmt->name, fmt_id_type[i].name)) {
yading@11:                 st->codec->codec_id   = fmt_id_type[i].id;
yading@11:                 st->codec->codec_type = fmt_id_type[i].type;
yading@11:                 break;
yading@11:             }
yading@11:         }
yading@11:     }
yading@11:     return score;
yading@11: }
yading@11: 
yading@11: /************************************************************/
yading@11: /* input media file */
yading@11: 
yading@11: int av_demuxer_open(AVFormatContext *ic){
yading@11:     int err;
yading@11: 
yading@11:     if (ic->iformat->read_header) {
yading@11:         err = ic->iformat->read_header(ic);
yading@11:         if (err < 0)
yading@11:             return err;
yading@11:     }
yading@11: 
yading@11:     if (ic->pb && !ic->data_offset)
yading@11:         ic->data_offset = avio_tell(ic->pb);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: 
yading@11: /** size of probe buffer, for guessing file type from file contents */
yading@11: #define PROBE_BUF_MIN 2048
yading@11: #define PROBE_BUF_MAX (1<<20)
yading@11: 
yading@11: int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
yading@11:                           const char *filename, void *logctx,
yading@11:                           unsigned int offset, unsigned int max_probe_size)
yading@11: {
yading@11:     AVProbeData pd = { filename ? filename : "", NULL, -offset };
yading@11:     unsigned char *buf = NULL;
yading@11:     uint8_t *mime_type;
yading@11:     int ret = 0, probe_size, buf_offset = 0;
yading@11: 
yading@11:     if (!max_probe_size) {
yading@11:         max_probe_size = PROBE_BUF_MAX;
yading@11:     } else if (max_probe_size > PROBE_BUF_MAX) {
yading@11:         max_probe_size = PROBE_BUF_MAX;
yading@11:     } else if (max_probe_size < PROBE_BUF_MIN) {
yading@11:         av_log(logctx, AV_LOG_ERROR,
yading@11:                "Specified probe size value %u cannot be < %u\n", max_probe_size, PROBE_BUF_MIN);
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     if (offset >= max_probe_size) {
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     if (!*fmt && pb->av_class && av_opt_get(pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type) >= 0 && mime_type) {
yading@11:         if (!av_strcasecmp(mime_type, "audio/aacp")) {
yading@11:             *fmt = av_find_input_format("aac");
yading@11:         }
yading@11:         av_freep(&mime_type);
yading@11:     }
yading@11: 
yading@11:     for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
yading@11:         probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
yading@11:         int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
yading@11:         void *buftmp;
yading@11: 
yading@11:         if (probe_size < offset) {
yading@11:             continue;
yading@11:         }
yading@11: 
yading@11:         /* read probe data */
yading@11:         buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
yading@11:         if(!buftmp){
yading@11:             av_free(buf);
yading@11:             return AVERROR(ENOMEM);
yading@11:         }
yading@11:         buf=buftmp;
yading@11:         if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
yading@11:             /* fail if error was not end of file, otherwise, lower score */
yading@11:             if (ret != AVERROR_EOF) {
yading@11:                 av_free(buf);
yading@11:                 return ret;
yading@11:             }
yading@11:             score = 0;
yading@11:             ret = 0;            /* error was end of file, nothing read */
yading@11:         }
yading@11:         pd.buf_size = buf_offset += ret;
yading@11:         pd.buf = &buf[offset];
yading@11: 
yading@11:         memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
yading@11: 
yading@11:         /* guess file format */
yading@11:         *fmt = av_probe_input_format2(&pd, 1, &score);
yading@11:         if(*fmt){
yading@11:             if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
yading@11:                 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
yading@11:             }else
yading@11:                 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (!*fmt) {
yading@11:         av_free(buf);
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11: 
yading@11:     /* rewind. reuse probe buffer to avoid seeking */
yading@11:     ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
yading@11: 
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: /* open input file and probe the format if necessary */
yading@11: static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
yading@11: {
yading@11:     int ret;
yading@11:     AVProbeData pd = {filename, NULL, 0};
yading@11:     int score = AVPROBE_SCORE_RETRY;
yading@11: 
yading@11:     if (s->pb) {
yading@11:         s->flags |= AVFMT_FLAG_CUSTOM_IO;
yading@11:         if (!s->iformat)
yading@11:             return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
yading@11:         else if (s->iformat->flags & AVFMT_NOFILE)
yading@11:             av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
yading@11:                                       "will be ignored with AVFMT_NOFILE format.\n");
yading@11:         return 0;
yading@11:     }
yading@11: 
yading@11:     if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
yading@11:         (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
yading@11:         return 0;
yading@11: 
yading@11:     if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
yading@11:                           &s->interrupt_callback, options)) < 0)
yading@11:         return ret;
yading@11:     if (s->iformat)
yading@11:         return 0;
yading@11:     return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
yading@11: }
yading@11: 
yading@11: static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
yading@11:                                AVPacketList **plast_pktl){
yading@11:     AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
yading@11:     if (!pktl)
yading@11:         return NULL;
yading@11: 
yading@11:     if (*packet_buffer)
yading@11:         (*plast_pktl)->next = pktl;
yading@11:     else
yading@11:         *packet_buffer = pktl;
yading@11: 
yading@11:     /* add the packet in the buffered packet list */
yading@11:     *plast_pktl = pktl;
yading@11:     pktl->pkt= *pkt;
yading@11:     return &pktl->pkt;
yading@11: }
yading@11: 
yading@11: int avformat_queue_attached_pictures(AVFormatContext *s)
yading@11: {
yading@11:     int i;
yading@11:     for (i = 0; i < s->nb_streams; i++)
yading@11:         if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
yading@11:             s->streams[i]->discard < AVDISCARD_ALL) {
yading@11:             AVPacket copy = s->streams[i]->attached_pic;
yading@11:             copy.buf      = av_buffer_ref(copy.buf);
yading@11:             if (!copy.buf)
yading@11:                 return AVERROR(ENOMEM);
yading@11: 
yading@11:             add_to_pktbuf(&s->raw_packet_buffer, &copy, &s->raw_packet_buffer_end);
yading@11:         }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
yading@11: {
yading@11:     AVFormatContext *s = *ps;
yading@11:     int ret = 0;
yading@11:     AVDictionary *tmp = NULL;
yading@11:     ID3v2ExtraMeta *id3v2_extra_meta = NULL;
yading@11: 
yading@11:     if (!s && !(s = avformat_alloc_context()))
yading@11:         return AVERROR(ENOMEM);
yading@11:     if (!s->av_class){
yading@11:         av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11:     if (fmt)
yading@11:         s->iformat = fmt;
yading@11: 
yading@11:     if (options)
yading@11:         av_dict_copy(&tmp, *options, 0);
yading@11: 
yading@11:     if ((ret = av_opt_set_dict(s, &tmp)) < 0)
yading@11:         goto fail;
yading@11: 
yading@11:     if ((ret = init_input(s, filename, &tmp)) < 0)
yading@11:         goto fail;
yading@11:     avio_skip(s->pb, s->skip_initial_bytes);
yading@11: 
yading@11:     /* check filename in case an image number is expected */
yading@11:     if (s->iformat->flags & AVFMT_NEEDNUMBER) {
yading@11:         if (!av_filename_number_test(filename)) {
yading@11:             ret = AVERROR(EINVAL);
yading@11:             goto fail;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     s->duration = s->start_time = AV_NOPTS_VALUE;
yading@11:     av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
yading@11: 
yading@11:     /* allocate private data */
yading@11:     if (s->iformat->priv_data_size > 0) {
yading@11:         if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
yading@11:             ret = AVERROR(ENOMEM);
yading@11:             goto fail;
yading@11:         }
yading@11:         if (s->iformat->priv_class) {
yading@11:             *(const AVClass**)s->priv_data = s->iformat->priv_class;
yading@11:             av_opt_set_defaults(s->priv_data);
yading@11:             if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
yading@11:                 goto fail;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
yading@11:     if (s->pb)
yading@11:         ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
yading@11: 
yading@11:     if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
yading@11:         if ((ret = s->iformat->read_header(s)) < 0)
yading@11:             goto fail;
yading@11: 
yading@11:     if (id3v2_extra_meta) {
yading@11:         if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac")) {
yading@11:             if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
yading@11:                 goto fail;
yading@11:         } else
yading@11:             av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
yading@11:     }
yading@11:     ff_id3v2_free_extra_meta(&id3v2_extra_meta);
yading@11: 
yading@11:     if ((ret = avformat_queue_attached_pictures(s)) < 0)
yading@11:         goto fail;
yading@11: 
yading@11:     if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
yading@11:         s->data_offset = avio_tell(s->pb);
yading@11: 
yading@11:     s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
yading@11: 
yading@11:     if (options) {
yading@11:         av_dict_free(options);
yading@11:         *options = tmp;
yading@11:     }
yading@11:     *ps = s;
yading@11:     return 0;
yading@11: 
yading@11: fail:
yading@11:     ff_id3v2_free_extra_meta(&id3v2_extra_meta);
yading@11:     av_dict_free(&tmp);
yading@11:     if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
yading@11:         avio_close(s->pb);
yading@11:     avformat_free_context(s);
yading@11:     *ps = NULL;
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: /*******************************************************/
yading@11: 
yading@11: static void force_codec_ids(AVFormatContext *s, AVStream *st)
yading@11: {
yading@11:     switch(st->codec->codec_type){
yading@11:     case AVMEDIA_TYPE_VIDEO:
yading@11:         if(s->video_codec_id)   st->codec->codec_id= s->video_codec_id;
yading@11:         break;
yading@11:     case AVMEDIA_TYPE_AUDIO:
yading@11:         if(s->audio_codec_id)   st->codec->codec_id= s->audio_codec_id;
yading@11:         break;
yading@11:     case AVMEDIA_TYPE_SUBTITLE:
yading@11:         if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
yading@11:         break;
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
yading@11: {
yading@11:     if(st->request_probe>0){
yading@11:         AVProbeData *pd = &st->probe_data;
yading@11:         int end;
yading@11:         av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
yading@11:         --st->probe_packets;
yading@11: 
yading@11:         if (pkt) {
yading@11:             uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
yading@11:             if(!new_buf)
yading@11:                 goto no_packet;
yading@11:             pd->buf = new_buf;
yading@11:             memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
yading@11:             pd->buf_size += pkt->size;
yading@11:             memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
yading@11:         } else {
yading@11: no_packet:
yading@11:             st->probe_packets = 0;
yading@11:             if (!pd->buf_size) {
yading@11:                 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
yading@11:                        st->index);
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         end=    s->raw_packet_buffer_remaining_size <= 0
yading@11:                 || st->probe_packets<=0;
yading@11: 
yading@11:         if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
yading@11:             int score= set_codec_from_probe_data(s, st, pd);
yading@11:             if(    (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
yading@11:                 || end){
yading@11:                 pd->buf_size=0;
yading@11:                 av_freep(&pd->buf);
yading@11:                 st->request_probe= -1;
yading@11:                 if(st->codec->codec_id != AV_CODEC_ID_NONE){
yading@11:                     av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
yading@11:                 }else
yading@11:                     av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
yading@11:             }
yading@11:             force_codec_ids(s, st);
yading@11:         }
yading@11:     }
yading@11: }
yading@11: 
yading@11: int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     int ret, i;
yading@11:     AVStream *st;
yading@11: 
yading@11:     for(;;){
yading@11:         AVPacketList *pktl = s->raw_packet_buffer;
yading@11: 
yading@11:         if (pktl) {
yading@11:             *pkt = pktl->pkt;
yading@11:             st = s->streams[pkt->stream_index];
yading@11:             if (s->raw_packet_buffer_remaining_size <= 0)
yading@11:                 probe_codec(s, st, NULL);
yading@11:             if(st->request_probe <= 0){
yading@11:                 s->raw_packet_buffer = pktl->next;
yading@11:                 s->raw_packet_buffer_remaining_size += pkt->size;
yading@11:                 av_free(pktl);
yading@11:                 return 0;
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         pkt->data = NULL;
yading@11:         pkt->size = 0;
yading@11:         av_init_packet(pkt);
yading@11:         ret= s->iformat->read_packet(s, pkt);
yading@11:         if (ret < 0) {
yading@11:             if (!pktl || ret == AVERROR(EAGAIN))
yading@11:                 return ret;
yading@11:             for (i = 0; i < s->nb_streams; i++) {
yading@11:                 st = s->streams[i];
yading@11:                 if (st->probe_packets) {
yading@11:                     probe_codec(s, st, NULL);
yading@11:                 }
yading@11:                 av_assert0(st->request_probe <= 0);
yading@11:             }
yading@11:             continue;
yading@11:         }
yading@11: 
yading@11:         if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
yading@11:             (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
yading@11:             av_log(s, AV_LOG_WARNING,
yading@11:                    "Dropped corrupted packet (stream = %d)\n",
yading@11:                    pkt->stream_index);
yading@11:             av_free_packet(pkt);
yading@11:             continue;
yading@11:         }
yading@11: 
yading@11:         if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
yading@11:             av_packet_merge_side_data(pkt);
yading@11: 
yading@11:         if(pkt->stream_index >= (unsigned)s->nb_streams){
yading@11:             av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
yading@11:             continue;
yading@11:         }
yading@11: 
yading@11:         st= s->streams[pkt->stream_index];
yading@11:         pkt->dts = wrap_timestamp(st, pkt->dts);
yading@11:         pkt->pts = wrap_timestamp(st, pkt->pts);
yading@11: 
yading@11:         force_codec_ids(s, st);
yading@11: 
yading@11:         /* TODO: audio: time filter; video: frame reordering (pts != dts) */
yading@11:         if (s->use_wallclock_as_timestamps)
yading@11:             pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
yading@11: 
yading@11:         if(!pktl && st->request_probe <= 0)
yading@11:             return ret;
yading@11: 
yading@11:         add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
yading@11:         s->raw_packet_buffer_remaining_size -= pkt->size;
yading@11: 
yading@11:         probe_codec(s, st, pkt);
yading@11:     }
yading@11: }
yading@11: 
yading@11: #if FF_API_READ_PACKET
yading@11: int av_read_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     return ff_read_packet(s, pkt);
yading@11: }
yading@11: #endif
yading@11: 
yading@11: 
yading@11: /**********************************************************/
yading@11: 
yading@11: static int determinable_frame_size(AVCodecContext *avctx)
yading@11: {
yading@11:     if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
yading@11:         avctx->codec_id == AV_CODEC_ID_MP1 ||
yading@11:         avctx->codec_id == AV_CODEC_ID_MP2 ||
yading@11:         avctx->codec_id == AV_CODEC_ID_MP3/* ||
yading@11:         avctx->codec_id == AV_CODEC_ID_CELT*/)
yading@11:         return 1;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Get the number of samples of an audio frame. Return -1 on error.
yading@11:  */
yading@11: int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
yading@11: {
yading@11:     int frame_size;
yading@11: 
yading@11:     /* give frame_size priority if demuxing */
yading@11:     if (!mux && enc->frame_size > 1)
yading@11:         return enc->frame_size;
yading@11: 
yading@11:     if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
yading@11:         return frame_size;
yading@11: 
yading@11:     /* fallback to using frame_size if muxing */
yading@11:     if (enc->frame_size > 1)
yading@11:         return enc->frame_size;
yading@11: 
yading@11:     //For WMA we currently have no other means to calculate duration thus we
yading@11:     //do it here by assuming CBR, which is true for all known cases.
yading@11:     if(!mux && enc->bit_rate>0 && size>0 && enc->sample_rate>0 && enc->block_align>1) {
yading@11:         if (enc->codec_id == AV_CODEC_ID_WMAV1 || enc->codec_id == AV_CODEC_ID_WMAV2)
yading@11:             return  ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
yading@11:     }
yading@11: 
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: 
yading@11: /**
yading@11:  * Return the frame duration in seconds. Return 0 if not available.
yading@11:  */
yading@11: void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
yading@11:                                AVCodecParserContext *pc, AVPacket *pkt)
yading@11: {
yading@11:     int frame_size;
yading@11: 
yading@11:     *pnum = 0;
yading@11:     *pden = 0;
yading@11:     switch(st->codec->codec_type) {
yading@11:     case AVMEDIA_TYPE_VIDEO:
yading@11:         if (st->r_frame_rate.num && !pc) {
yading@11:             *pnum = st->r_frame_rate.den;
yading@11:             *pden = st->r_frame_rate.num;
yading@11:         } else if(st->time_base.num*1000LL > st->time_base.den) {
yading@11:             *pnum = st->time_base.num;
yading@11:             *pden = st->time_base.den;
yading@11:         }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
yading@11:             *pnum = st->codec->time_base.num;
yading@11:             *pden = st->codec->time_base.den;
yading@11:             if (pc && pc->repeat_pict) {
yading@11:                 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
yading@11:                     *pden /= 1 + pc->repeat_pict;
yading@11:                 else
yading@11:                     *pnum *= 1 + pc->repeat_pict;
yading@11:             }
yading@11:             //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
yading@11:             //Thus if we have no parser in such case leave duration undefined.
yading@11:             if(st->codec->ticks_per_frame>1 && !pc){
yading@11:                 *pnum = *pden = 0;
yading@11:             }
yading@11:         }
yading@11:         break;
yading@11:     case AVMEDIA_TYPE_AUDIO:
yading@11:         frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
yading@11:         if (frame_size <= 0 || st->codec->sample_rate <= 0)
yading@11:             break;
yading@11:         *pnum = frame_size;
yading@11:         *pden = st->codec->sample_rate;
yading@11:         break;
yading@11:     default:
yading@11:         break;
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int is_intra_only(AVCodecContext *enc){
yading@11:     const AVCodecDescriptor *desc;
yading@11: 
yading@11:     if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
yading@11:         return 1;
yading@11: 
yading@11:     desc = av_codec_get_codec_descriptor(enc);
yading@11:     if (!desc) {
yading@11:         desc = avcodec_descriptor_get(enc->codec_id);
yading@11:         av_codec_set_codec_descriptor(enc, desc);
yading@11:     }
yading@11:     if (desc)
yading@11:         return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int has_decode_delay_been_guessed(AVStream *st)
yading@11: {
yading@11:     if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
yading@11:     if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
yading@11:         return 1;
yading@11: #if CONFIG_H264_DECODER
yading@11:     if(st->codec->has_b_frames &&
yading@11:        avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
yading@11:         return 1;
yading@11: #endif
yading@11:     if(st->codec->has_b_frames<3)
yading@11:         return st->nb_decoded_frames >= 7;
yading@11:     else if(st->codec->has_b_frames<4)
yading@11:         return st->nb_decoded_frames >= 18;
yading@11:     else
yading@11:         return st->nb_decoded_frames >= 20;
yading@11: }
yading@11: 
yading@11: static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
yading@11: {
yading@11:     if (pktl->next)
yading@11:         return pktl->next;
yading@11:     if (pktl == s->parse_queue_end)
yading@11:         return s->packet_buffer;
yading@11:     return NULL;
yading@11: }
yading@11: 
yading@11: static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index)
yading@11: {
yading@11:     if (s->correct_ts_overflow && st->pts_wrap_bits < 63 &&
yading@11:         st->pts_wrap_reference == AV_NOPTS_VALUE && st->first_dts != AV_NOPTS_VALUE) {
yading@11:         int i;
yading@11: 
yading@11:         // reference time stamp should be 60 s before first time stamp
yading@11:         int64_t pts_wrap_reference = st->first_dts - av_rescale(60, st->time_base.den, st->time_base.num);
yading@11:         // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
yading@11:         int pts_wrap_behavior = (st->first_dts < (1LL<<st->pts_wrap_bits) - (1LL<<st->pts_wrap_bits-3)) ||
yading@11:             (st->first_dts < (1LL<<st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
yading@11:             AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
yading@11: 
yading@11:         AVProgram *first_program = av_find_program_from_stream(s, NULL, stream_index);
yading@11: 
yading@11:         if (!first_program) {
yading@11:             int default_stream_index = av_find_default_stream_index(s);
yading@11:             if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
yading@11:                 for (i=0; i<s->nb_streams; i++) {
yading@11:                     s->streams[i]->pts_wrap_reference = pts_wrap_reference;
yading@11:                     s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
yading@11:                 }
yading@11:             }
yading@11:             else {
yading@11:                 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
yading@11:                 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
yading@11:             }
yading@11:         }
yading@11:         else {
yading@11:             AVProgram *program = first_program;
yading@11:             while (program) {
yading@11:                 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
yading@11:                     pts_wrap_reference = program->pts_wrap_reference;
yading@11:                     pts_wrap_behavior = program->pts_wrap_behavior;
yading@11:                     break;
yading@11:                 }
yading@11:                 program = av_find_program_from_stream(s, program, stream_index);
yading@11:             }
yading@11: 
yading@11:             // update every program with differing pts_wrap_reference
yading@11:             program = first_program;
yading@11:             while(program) {
yading@11:                 if (program->pts_wrap_reference != pts_wrap_reference) {
yading@11:                     for (i=0; i<program->nb_stream_indexes; i++) {
yading@11:                         s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
yading@11:                         s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
yading@11:                     }
yading@11: 
yading@11:                     program->pts_wrap_reference = pts_wrap_reference;
yading@11:                     program->pts_wrap_behavior = pts_wrap_behavior;
yading@11:                 }
yading@11:                 program = av_find_program_from_stream(s, program, stream_index);
yading@11:             }
yading@11:         }
yading@11:         return 1;
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static void update_initial_timestamps(AVFormatContext *s, int stream_index,
yading@11:                                       int64_t dts, int64_t pts, AVPacket *pkt)
yading@11: {
yading@11:     AVStream *st= s->streams[stream_index];
yading@11:     AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
yading@11:     int64_t pts_buffer[MAX_REORDER_DELAY+1];
yading@11:     int64_t shift;
yading@11:     int i, delay;
yading@11: 
yading@11:     if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
yading@11:         return;
yading@11: 
yading@11:     delay = st->codec->has_b_frames;
yading@11:     st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
yading@11:     st->cur_dts= dts;
yading@11:     shift = st->first_dts - RELATIVE_TS_BASE;
yading@11: 
yading@11:     for (i=0; i<MAX_REORDER_DELAY+1; i++)
yading@11:         pts_buffer[i] = AV_NOPTS_VALUE;
yading@11: 
yading@11:     if (is_relative(pts))
yading@11:         pts += shift;
yading@11: 
yading@11:     for(; pktl; pktl= get_next_pkt(s, st, pktl)){
yading@11:         if(pktl->pkt.stream_index != stream_index)
yading@11:             continue;
yading@11:         if(is_relative(pktl->pkt.pts))
yading@11:             pktl->pkt.pts += shift;
yading@11: 
yading@11:         if(is_relative(pktl->pkt.dts))
yading@11:             pktl->pkt.dts += shift;
yading@11: 
yading@11:         if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
yading@11:             st->start_time= pktl->pkt.pts;
yading@11: 
yading@11:         if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
yading@11:             pts_buffer[0]= pktl->pkt.pts;
yading@11:             for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
yading@11:                 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
yading@11:             if(pktl->pkt.dts == AV_NOPTS_VALUE)
yading@11:                 pktl->pkt.dts= pts_buffer[0];
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (update_wrap_reference(s, st, stream_index) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
yading@11:         // correct first time stamps to negative values
yading@11:         st->first_dts = wrap_timestamp(st, st->first_dts);
yading@11:         st->cur_dts = wrap_timestamp(st, st->cur_dts);
yading@11:         pkt->dts = wrap_timestamp(st, pkt->dts);
yading@11:         pkt->pts = wrap_timestamp(st, pkt->pts);
yading@11:         pts = wrap_timestamp(st, pts);
yading@11:     }
yading@11: 
yading@11:     if (st->start_time == AV_NOPTS_VALUE)
yading@11:         st->start_time = pts;
yading@11: }
yading@11: 
yading@11: static void update_initial_durations(AVFormatContext *s, AVStream *st,
yading@11:                                      int stream_index, int duration)
yading@11: {
yading@11:     AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
yading@11:     int64_t cur_dts= RELATIVE_TS_BASE;
yading@11: 
yading@11:     if(st->first_dts != AV_NOPTS_VALUE){
yading@11:         cur_dts= st->first_dts;
yading@11:         for(; pktl; pktl= get_next_pkt(s, st, pktl)){
yading@11:             if(pktl->pkt.stream_index == stream_index){
yading@11:                 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
yading@11:                     break;
yading@11:                 cur_dts -= duration;
yading@11:             }
yading@11:         }
yading@11:         if(pktl && pktl->pkt.dts != st->first_dts) {
yading@11:             av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s in the queue\n", av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts));
yading@11:             return;
yading@11:         }
yading@11:         if(!pktl) {
yading@11:             av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
yading@11:             return;
yading@11:         }
yading@11:         pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
yading@11:         st->first_dts = cur_dts;
yading@11:     }else if(st->cur_dts != RELATIVE_TS_BASE)
yading@11:         return;
yading@11: 
yading@11:     for(; pktl; pktl= get_next_pkt(s, st, pktl)){
yading@11:         if(pktl->pkt.stream_index != stream_index)
yading@11:             continue;
yading@11:         if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
yading@11:            && !pktl->pkt.duration){
yading@11:             pktl->pkt.dts= cur_dts;
yading@11:             if(!st->codec->has_b_frames)
yading@11:                 pktl->pkt.pts= cur_dts;
yading@11: //            if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
yading@11:                 pktl->pkt.duration = duration;
yading@11:         }else
yading@11:             break;
yading@11:         cur_dts = pktl->pkt.dts + pktl->pkt.duration;
yading@11:     }
yading@11:     if(!pktl)
yading@11:         st->cur_dts= cur_dts;
yading@11: }
yading@11: 
yading@11: static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
yading@11:                                AVCodecParserContext *pc, AVPacket *pkt)
yading@11: {
yading@11:     int num, den, presentation_delayed, delay, i;
yading@11:     int64_t offset;
yading@11: 
yading@11:     if (s->flags & AVFMT_FLAG_NOFILLIN)
yading@11:         return;
yading@11: 
yading@11:     if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
yading@11:         pkt->dts= AV_NOPTS_VALUE;
yading@11: 
yading@11:     if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
yading@11:         //FIXME Set low_delay = 0 when has_b_frames = 1
yading@11:         st->codec->has_b_frames = 1;
yading@11: 
yading@11:     /* do we have a video B-frame ? */
yading@11:     delay= st->codec->has_b_frames;
yading@11:     presentation_delayed = 0;
yading@11: 
yading@11:     /* XXX: need has_b_frame, but cannot get it if the codec is
yading@11:         not initialized */
yading@11:     if (delay &&
yading@11:         pc && pc->pict_type != AV_PICTURE_TYPE_B)
yading@11:         presentation_delayed = 1;
yading@11: 
yading@11:     if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && st->pts_wrap_bits<63 && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts){
yading@11:         if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
yading@11:             pkt->dts -= 1LL<<st->pts_wrap_bits;
yading@11:         } else
yading@11:             pkt->pts += 1LL<<st->pts_wrap_bits;
yading@11:     }
yading@11: 
yading@11:     // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
yading@11:     // we take the conservative approach and discard both
yading@11:     // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
yading@11:     if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
yading@11:         av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
yading@11:         if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
yading@11:             pkt->dts= AV_NOPTS_VALUE;
yading@11:     }
yading@11: 
yading@11:     if (pkt->duration == 0) {
yading@11:         ff_compute_frame_duration(&num, &den, st, pc, pkt);
yading@11:         if (den && num) {
yading@11:             pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
yading@11:         }
yading@11:     }
yading@11:     if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
yading@11:         update_initial_durations(s, st, pkt->stream_index, pkt->duration);
yading@11: 
yading@11:     /* correct timestamps with byte offset if demuxers only have timestamps
yading@11:        on packet boundaries */
yading@11:     if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
yading@11:         /* this will estimate bitrate based on this frame's duration and size */
yading@11:         offset = av_rescale(pc->offset, pkt->duration, pkt->size);
yading@11:         if(pkt->pts != AV_NOPTS_VALUE)
yading@11:             pkt->pts += offset;
yading@11:         if(pkt->dts != AV_NOPTS_VALUE)
yading@11:             pkt->dts += offset;
yading@11:     }
yading@11: 
yading@11:     if (pc && pc->dts_sync_point >= 0) {
yading@11:         // we have synchronization info from the parser
yading@11:         int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
yading@11:         if (den > 0) {
yading@11:             int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
yading@11:             if (pkt->dts != AV_NOPTS_VALUE) {
yading@11:                 // got DTS from the stream, update reference timestamp
yading@11:                 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
yading@11:                 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
yading@11:             } else if (st->reference_dts != AV_NOPTS_VALUE) {
yading@11:                 // compute DTS based on reference timestamp
yading@11:                 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
yading@11:                 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
yading@11:             }
yading@11:             if (pc->dts_sync_point > 0)
yading@11:                 st->reference_dts = pkt->dts; // new reference
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     /* This may be redundant, but it should not hurt. */
yading@11:     if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
yading@11:         presentation_delayed = 1;
yading@11: 
yading@11:     av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
yading@11:            presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
yading@11:     /* interpolate PTS and DTS if they are not present */
yading@11:     //We skip H264 currently because delay and has_b_frames are not reliably set
yading@11:     if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
yading@11:         if (presentation_delayed) {
yading@11:             /* DTS = decompression timestamp */
yading@11:             /* PTS = presentation timestamp */
yading@11:             if (pkt->dts == AV_NOPTS_VALUE)
yading@11:                 pkt->dts = st->last_IP_pts;
yading@11:             update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
yading@11:             if (pkt->dts == AV_NOPTS_VALUE)
yading@11:                 pkt->dts = st->cur_dts;
yading@11: 
yading@11:             /* this is tricky: the dts must be incremented by the duration
yading@11:             of the frame we are displaying, i.e. the last I- or P-frame */
yading@11:             if (st->last_IP_duration == 0)
yading@11:                 st->last_IP_duration = pkt->duration;
yading@11:             if(pkt->dts != AV_NOPTS_VALUE)
yading@11:                 st->cur_dts = pkt->dts + st->last_IP_duration;
yading@11:             st->last_IP_duration  = pkt->duration;
yading@11:             st->last_IP_pts= pkt->pts;
yading@11:             /* cannot compute PTS if not present (we can compute it only
yading@11:             by knowing the future */
yading@11:         } else if (pkt->pts != AV_NOPTS_VALUE ||
yading@11:                    pkt->dts != AV_NOPTS_VALUE ||
yading@11:                    pkt->duration                ) {
yading@11:             int duration = pkt->duration;
yading@11: 
yading@11:             /* presentation is not delayed : PTS and DTS are the same */
yading@11:             if (pkt->pts == AV_NOPTS_VALUE)
yading@11:                 pkt->pts = pkt->dts;
yading@11:             update_initial_timestamps(s, pkt->stream_index, pkt->pts,
yading@11:                                       pkt->pts, pkt);
yading@11:             if (pkt->pts == AV_NOPTS_VALUE)
yading@11:                 pkt->pts = st->cur_dts;
yading@11:             pkt->dts = pkt->pts;
yading@11:             if (pkt->pts != AV_NOPTS_VALUE)
yading@11:                 st->cur_dts = pkt->pts + duration;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
yading@11:         st->pts_buffer[0]= pkt->pts;
yading@11:         for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
yading@11:             FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
yading@11:         if(pkt->dts == AV_NOPTS_VALUE)
yading@11:             pkt->dts= st->pts_buffer[0];
yading@11:     }
yading@11:     if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
yading@11:         update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); // this should happen on the first packet
yading@11:     }
yading@11:     if(pkt->dts > st->cur_dts)
yading@11:         st->cur_dts = pkt->dts;
yading@11: 
yading@11:     av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
yading@11:             presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
yading@11: 
yading@11:     /* update flags */
yading@11:     if (is_intra_only(st->codec))
yading@11:         pkt->flags |= AV_PKT_FLAG_KEY;
yading@11:     if (pc)
yading@11:         pkt->convergence_duration = pc->convergence_duration;
yading@11: }
yading@11: 
yading@11: static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
yading@11: {
yading@11:     while (*pkt_buf) {
yading@11:         AVPacketList *pktl = *pkt_buf;
yading@11:         *pkt_buf = pktl->next;
yading@11:         av_free_packet(&pktl->pkt);
yading@11:         av_freep(&pktl);
yading@11:     }
yading@11:     *pkt_buf_end = NULL;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Parse a packet, add all split parts to parse_queue
yading@11:  *
yading@11:  * @param pkt packet to parse, NULL when flushing the parser at end of stream
yading@11:  */
yading@11: static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
yading@11: {
yading@11:     AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
yading@11:     AVStream     *st = s->streams[stream_index];
yading@11:     uint8_t    *data = pkt ? pkt->data : NULL;
yading@11:     int         size = pkt ? pkt->size : 0;
yading@11:     int ret = 0, got_output = 0;
yading@11: 
yading@11:     if (!pkt) {
yading@11:         av_init_packet(&flush_pkt);
yading@11:         pkt = &flush_pkt;
yading@11:         got_output = 1;
yading@11:     } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
yading@11:         // preserve 0-size sync packets
yading@11:         compute_pkt_fields(s, st, st->parser, pkt);
yading@11:     }
yading@11: 
yading@11:     while (size > 0 || (pkt == &flush_pkt && got_output)) {
yading@11:         int len;
yading@11: 
yading@11:         av_init_packet(&out_pkt);
yading@11:         len = av_parser_parse2(st->parser,  st->codec,
yading@11:                                &out_pkt.data, &out_pkt.size, data, size,
yading@11:                                pkt->pts, pkt->dts, pkt->pos);
yading@11: 
yading@11:         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
yading@11:         pkt->pos = -1;
yading@11:         /* increment read pointer */
yading@11:         data += len;
yading@11:         size -= len;
yading@11: 
yading@11:         got_output = !!out_pkt.size;
yading@11: 
yading@11:         if (!out_pkt.size)
yading@11:             continue;
yading@11: 
yading@11:         /* set the duration */
yading@11:         out_pkt.duration = 0;
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
yading@11:             if (st->codec->sample_rate > 0) {
yading@11:                 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
yading@11:                                                     (AVRational){ 1, st->codec->sample_rate },
yading@11:                                                     st->time_base,
yading@11:                                                     AV_ROUND_DOWN);
yading@11:             }
yading@11:         } else if (st->codec->time_base.num != 0 &&
yading@11:                    st->codec->time_base.den != 0) {
yading@11:             out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
yading@11:                                                 st->codec->time_base,
yading@11:                                                 st->time_base,
yading@11:                                                 AV_ROUND_DOWN);
yading@11:         }
yading@11: 
yading@11:         out_pkt.stream_index = st->index;
yading@11:         out_pkt.pts = st->parser->pts;
yading@11:         out_pkt.dts = st->parser->dts;
yading@11:         out_pkt.pos = st->parser->pos;
yading@11: 
yading@11:         if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
yading@11:             out_pkt.pos = st->parser->frame_offset;
yading@11: 
yading@11:         if (st->parser->key_frame == 1 ||
yading@11:             (st->parser->key_frame == -1 &&
yading@11:              st->parser->pict_type == AV_PICTURE_TYPE_I))
yading@11:             out_pkt.flags |= AV_PKT_FLAG_KEY;
yading@11: 
yading@11:         if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
yading@11:             out_pkt.flags |= AV_PKT_FLAG_KEY;
yading@11: 
yading@11:         compute_pkt_fields(s, st, st->parser, &out_pkt);
yading@11: 
yading@11:         if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
yading@11:             out_pkt.buf   = pkt->buf;
yading@11:             pkt->buf      = NULL;
yading@11: #if FF_API_DESTRUCT_PACKET
yading@11:             out_pkt.destruct = pkt->destruct;
yading@11:             pkt->destruct = NULL;
yading@11: #endif
yading@11:         }
yading@11:         if ((ret = av_dup_packet(&out_pkt)) < 0)
yading@11:             goto fail;
yading@11: 
yading@11:         if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
yading@11:             av_free_packet(&out_pkt);
yading@11:             ret = AVERROR(ENOMEM);
yading@11:             goto fail;
yading@11:         }
yading@11:     }
yading@11: 
yading@11: 
yading@11:     /* end of the stream => close and free the parser */
yading@11:     if (pkt == &flush_pkt) {
yading@11:         av_parser_close(st->parser);
yading@11:         st->parser = NULL;
yading@11:     }
yading@11: 
yading@11: fail:
yading@11:     av_free_packet(pkt);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int read_from_packet_buffer(AVPacketList **pkt_buffer,
yading@11:                                    AVPacketList **pkt_buffer_end,
yading@11:                                    AVPacket      *pkt)
yading@11: {
yading@11:     AVPacketList *pktl;
yading@11:     av_assert0(*pkt_buffer);
yading@11:     pktl = *pkt_buffer;
yading@11:     *pkt = pktl->pkt;
yading@11:     *pkt_buffer = pktl->next;
yading@11:     if (!pktl->next)
yading@11:         *pkt_buffer_end = NULL;
yading@11:     av_freep(&pktl);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     int ret = 0, i, got_packet = 0;
yading@11: 
yading@11:     av_init_packet(pkt);
yading@11: 
yading@11:     while (!got_packet && !s->parse_queue) {
yading@11:         AVStream *st;
yading@11:         AVPacket cur_pkt;
yading@11: 
yading@11:         /* read next packet */
yading@11:         ret = ff_read_packet(s, &cur_pkt);
yading@11:         if (ret < 0) {
yading@11:             if (ret == AVERROR(EAGAIN))
yading@11:                 return ret;
yading@11:             /* flush the parsers */
yading@11:             for(i = 0; i < s->nb_streams; i++) {
yading@11:                 st = s->streams[i];
yading@11:                 if (st->parser && st->need_parsing)
yading@11:                     parse_packet(s, NULL, st->index);
yading@11:             }
yading@11:             /* all remaining packets are now in parse_queue =>
yading@11:              * really terminate parsing */
yading@11:             break;
yading@11:         }
yading@11:         ret = 0;
yading@11:         st  = s->streams[cur_pkt.stream_index];
yading@11: 
yading@11:         if (cur_pkt.pts != AV_NOPTS_VALUE &&
yading@11:             cur_pkt.dts != AV_NOPTS_VALUE &&
yading@11:             cur_pkt.pts < cur_pkt.dts) {
yading@11:             av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
yading@11:                    cur_pkt.stream_index,
yading@11:                    av_ts2str(cur_pkt.pts),
yading@11:                    av_ts2str(cur_pkt.dts),
yading@11:                    cur_pkt.size);
yading@11:         }
yading@11:         if (s->debug & FF_FDEBUG_TS)
yading@11:             av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
yading@11:                    cur_pkt.stream_index,
yading@11:                    av_ts2str(cur_pkt.pts),
yading@11:                    av_ts2str(cur_pkt.dts),
yading@11:                    cur_pkt.size,
yading@11:                    cur_pkt.duration,
yading@11:                    cur_pkt.flags);
yading@11: 
yading@11:         if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
yading@11:             st->parser = av_parser_init(st->codec->codec_id);
yading@11:             if (!st->parser) {
yading@11:                 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
yading@11:                        "%s, packets or times may be invalid.\n",
yading@11:                        avcodec_get_name(st->codec->codec_id));
yading@11:                 /* no parser available: just output the raw packets */
yading@11:                 st->need_parsing = AVSTREAM_PARSE_NONE;
yading@11:             } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
yading@11:                 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
yading@11:             } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
yading@11:                 st->parser->flags |= PARSER_FLAG_ONCE;
yading@11:             } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
yading@11:                 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         if (!st->need_parsing || !st->parser) {
yading@11:             /* no parsing needed: we just output the packet as is */
yading@11:             *pkt = cur_pkt;
yading@11:             compute_pkt_fields(s, st, NULL, pkt);
yading@11:             if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
yading@11:                 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
yading@11:                 ff_reduce_index(s, st->index);
yading@11:                 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
yading@11:             }
yading@11:             got_packet = 1;
yading@11:         } else if (st->discard < AVDISCARD_ALL) {
yading@11:             if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
yading@11:                 return ret;
yading@11:         } else {
yading@11:             /* free packet */
yading@11:             av_free_packet(&cur_pkt);
yading@11:         }
yading@11:         if (pkt->flags & AV_PKT_FLAG_KEY)
yading@11:             st->skip_to_keyframe = 0;
yading@11:         if (st->skip_to_keyframe) {
yading@11:             av_free_packet(&cur_pkt);
yading@11:             got_packet = 0;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (!got_packet && s->parse_queue)
yading@11:         ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
yading@11: 
yading@11:     if(s->debug & FF_FDEBUG_TS)
yading@11:         av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
yading@11:             pkt->stream_index,
yading@11:             av_ts2str(pkt->pts),
yading@11:             av_ts2str(pkt->dts),
yading@11:             pkt->size,
yading@11:             pkt->duration,
yading@11:             pkt->flags);
yading@11: 
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: int av_read_frame(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     const int genpts = s->flags & AVFMT_FLAG_GENPTS;
yading@11:     int          eof = 0;
yading@11:     int ret;
yading@11:     AVStream *st;
yading@11: 
yading@11:     if (!genpts) {
yading@11:         ret = s->packet_buffer ?
yading@11:             read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
yading@11:             read_frame_internal(s, pkt);
yading@11:         if (ret < 0)
yading@11:             return ret;
yading@11:         goto return_packet;
yading@11:     }
yading@11: 
yading@11:     for (;;) {
yading@11:         AVPacketList *pktl = s->packet_buffer;
yading@11: 
yading@11:         if (pktl) {
yading@11:             AVPacket *next_pkt = &pktl->pkt;
yading@11: 
yading@11:             if (next_pkt->dts != AV_NOPTS_VALUE) {
yading@11:                 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
yading@11:                 // last dts seen for this stream. if any of packets following
yading@11:                 // current one had no dts, we will set this to AV_NOPTS_VALUE.
yading@11:                 int64_t last_dts = next_pkt->dts;
yading@11:                 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
yading@11:                     if (pktl->pkt.stream_index == next_pkt->stream_index &&
yading@11:                         (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
yading@11:                         if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
yading@11:                             next_pkt->pts = pktl->pkt.dts;
yading@11:                         }
yading@11:                         if (last_dts != AV_NOPTS_VALUE) {
yading@11:                             // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
yading@11:                             last_dts = pktl->pkt.dts;
yading@11:                         }
yading@11:                     }
yading@11:                     pktl = pktl->next;
yading@11:                 }
yading@11:                 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
yading@11:                     // Fixing the last reference frame had none pts issue (For MXF etc).
yading@11:                     // We only do this when
yading@11:                     // 1. eof.
yading@11:                     // 2. we are not able to resolve a pts value for current packet.
yading@11:                     // 3. the packets for this stream at the end of the files had valid dts.
yading@11:                     next_pkt->pts = last_dts + next_pkt->duration;
yading@11:                 }
yading@11:                 pktl = s->packet_buffer;
yading@11:             }
yading@11: 
yading@11:             /* read packet from packet buffer, if there is data */
yading@11:             if (!(next_pkt->pts == AV_NOPTS_VALUE &&
yading@11:                   next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
yading@11:                 ret = read_from_packet_buffer(&s->packet_buffer,
yading@11:                                                &s->packet_buffer_end, pkt);
yading@11:                 goto return_packet;
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         ret = read_frame_internal(s, pkt);
yading@11:         if (ret < 0) {
yading@11:             if (pktl && ret != AVERROR(EAGAIN)) {
yading@11:                 eof = 1;
yading@11:                 continue;
yading@11:             } else
yading@11:                 return ret;
yading@11:         }
yading@11: 
yading@11:         if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
yading@11:                           &s->packet_buffer_end)) < 0)
yading@11:             return AVERROR(ENOMEM);
yading@11:     }
yading@11: 
yading@11: return_packet:
yading@11: 
yading@11:     st = s->streams[pkt->stream_index];
yading@11:     if (st->skip_samples) {
yading@11:         uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
yading@11:         AV_WL32(p, st->skip_samples);
yading@11:         av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
yading@11:         st->skip_samples = 0;
yading@11:     }
yading@11: 
yading@11:     if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
yading@11:         ff_reduce_index(s, st->index);
yading@11:         av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
yading@11:     }
yading@11: 
yading@11:     if (is_relative(pkt->dts))
yading@11:         pkt->dts -= RELATIVE_TS_BASE;
yading@11:     if (is_relative(pkt->pts))
yading@11:         pkt->pts -= RELATIVE_TS_BASE;
yading@11: 
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: /* XXX: suppress the packet queue */
yading@11: static void flush_packet_queue(AVFormatContext *s)
yading@11: {
yading@11:     free_packet_buffer(&s->parse_queue,       &s->parse_queue_end);
yading@11:     free_packet_buffer(&s->packet_buffer,     &s->packet_buffer_end);
yading@11:     free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
yading@11: 
yading@11:     s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
yading@11: }
yading@11: 
yading@11: /*******************************************************/
yading@11: /* seek support */
yading@11: 
yading@11: int av_find_default_stream_index(AVFormatContext *s)
yading@11: {
yading@11:     int first_audio_index = -1;
yading@11:     int i;
yading@11:     AVStream *st;
yading@11: 
yading@11:     if (s->nb_streams <= 0)
yading@11:         return -1;
yading@11:     for(i = 0; i < s->nb_streams; i++) {
yading@11:         st = s->streams[i];
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
yading@11:             !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
yading@11:             return i;
yading@11:         }
yading@11:         if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
yading@11:             first_audio_index = i;
yading@11:     }
yading@11:     return first_audio_index >= 0 ? first_audio_index : 0;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Flush the frame reader.
yading@11:  */
yading@11: void ff_read_frame_flush(AVFormatContext *s)
yading@11: {
yading@11:     AVStream *st;
yading@11:     int i, j;
yading@11: 
yading@11:     flush_packet_queue(s);
yading@11: 
yading@11:     /* for each stream, reset read state */
yading@11:     for(i = 0; i < s->nb_streams; i++) {
yading@11:         st = s->streams[i];
yading@11: 
yading@11:         if (st->parser) {
yading@11:             av_parser_close(st->parser);
yading@11:             st->parser = NULL;
yading@11:         }
yading@11:         st->last_IP_pts = AV_NOPTS_VALUE;
yading@11:         if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
yading@11:         else                                st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
yading@11:         st->reference_dts = AV_NOPTS_VALUE;
yading@11: 
yading@11:         st->probe_packets = MAX_PROBE_PACKETS;
yading@11: 
yading@11:         for(j=0; j<MAX_REORDER_DELAY+1; j++)
yading@11:             st->pts_buffer[j]= AV_NOPTS_VALUE;
yading@11:     }
yading@11: }
yading@11: 
yading@11: void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
yading@11: {
yading@11:     int i;
yading@11: 
yading@11:     for(i = 0; i < s->nb_streams; i++) {
yading@11:         AVStream *st = s->streams[i];
yading@11: 
yading@11:         st->cur_dts = av_rescale(timestamp,
yading@11:                                  st->time_base.den * (int64_t)ref_st->time_base.num,
yading@11:                                  st->time_base.num * (int64_t)ref_st->time_base.den);
yading@11:     }
yading@11: }
yading@11: 
yading@11: void ff_reduce_index(AVFormatContext *s, int stream_index)
yading@11: {
yading@11:     AVStream *st= s->streams[stream_index];
yading@11:     unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
yading@11: 
yading@11:     if((unsigned)st->nb_index_entries >= max_entries){
yading@11:         int i;
yading@11:         for(i=0; 2*i<st->nb_index_entries; i++)
yading@11:             st->index_entries[i]= st->index_entries[2*i];
yading@11:         st->nb_index_entries= i;
yading@11:     }
yading@11: }
yading@11: 
yading@11: int ff_add_index_entry(AVIndexEntry **index_entries,
yading@11:                        int *nb_index_entries,
yading@11:                        unsigned int *index_entries_allocated_size,
yading@11:                        int64_t pos, int64_t timestamp, int size, int distance, int flags)
yading@11: {
yading@11:     AVIndexEntry *entries, *ie;
yading@11:     int index;
yading@11: 
yading@11:     if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
yading@11:         return -1;
yading@11: 
yading@11:     if(timestamp == AV_NOPTS_VALUE)
yading@11:         return AVERROR(EINVAL);
yading@11: 
yading@11:     if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
yading@11:         timestamp -= RELATIVE_TS_BASE;
yading@11: 
yading@11:     entries = av_fast_realloc(*index_entries,
yading@11:                               index_entries_allocated_size,
yading@11:                               (*nb_index_entries + 1) *
yading@11:                               sizeof(AVIndexEntry));
yading@11:     if(!entries)
yading@11:         return -1;
yading@11: 
yading@11:     *index_entries= entries;
yading@11: 
yading@11:     index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
yading@11: 
yading@11:     if(index<0){
yading@11:         index= (*nb_index_entries)++;
yading@11:         ie= &entries[index];
yading@11:         av_assert0(index==0 || ie[-1].timestamp < timestamp);
yading@11:     }else{
yading@11:         ie= &entries[index];
yading@11:         if(ie->timestamp != timestamp){
yading@11:             if(ie->timestamp <= timestamp)
yading@11:                 return -1;
yading@11:             memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
yading@11:             (*nb_index_entries)++;
yading@11:         }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
yading@11:             distance= ie->min_distance;
yading@11:     }
yading@11: 
yading@11:     ie->pos = pos;
yading@11:     ie->timestamp = timestamp;
yading@11:     ie->min_distance= distance;
yading@11:     ie->size= size;
yading@11:     ie->flags = flags;
yading@11: 
yading@11:     return index;
yading@11: }
yading@11: 
yading@11: int av_add_index_entry(AVStream *st,
yading@11:                        int64_t pos, int64_t timestamp, int size, int distance, int flags)
yading@11: {
yading@11:     timestamp = wrap_timestamp(st, timestamp);
yading@11:     return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
yading@11:                               &st->index_entries_allocated_size, pos,
yading@11:                               timestamp, size, distance, flags);
yading@11: }
yading@11: 
yading@11: int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
yading@11:                               int64_t wanted_timestamp, int flags)
yading@11: {
yading@11:     int a, b, m;
yading@11:     int64_t timestamp;
yading@11: 
yading@11:     a = - 1;
yading@11:     b = nb_entries;
yading@11: 
yading@11:     //optimize appending index entries at the end
yading@11:     if(b && entries[b-1].timestamp < wanted_timestamp)
yading@11:         a= b-1;
yading@11: 
yading@11:     while (b - a > 1) {
yading@11:         m = (a + b) >> 1;
yading@11:         timestamp = entries[m].timestamp;
yading@11:         if(timestamp >= wanted_timestamp)
yading@11:             b = m;
yading@11:         if(timestamp <= wanted_timestamp)
yading@11:             a = m;
yading@11:     }
yading@11:     m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
yading@11: 
yading@11:     if(!(flags & AVSEEK_FLAG_ANY)){
yading@11:         while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
yading@11:             m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if(m == nb_entries)
yading@11:         return -1;
yading@11:     return  m;
yading@11: }
yading@11: 
yading@11: int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
yading@11:                               int flags)
yading@11: {
yading@11:     return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
yading@11:                                      wanted_timestamp, flags);
yading@11: }
yading@11: 
yading@11: static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
yading@11:                                  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
yading@11: {
yading@11:     int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
yading@11:     if (stream_index >= 0)
yading@11:         ts = wrap_timestamp(s->streams[stream_index], ts);
yading@11:     return ts;
yading@11: }
yading@11: 
yading@11: int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
yading@11: {
yading@11:     AVInputFormat *avif= s->iformat;
yading@11:     int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
yading@11:     int64_t ts_min, ts_max, ts;
yading@11:     int index;
yading@11:     int64_t ret;
yading@11:     AVStream *st;
yading@11: 
yading@11:     if (stream_index < 0)
yading@11:         return -1;
yading@11: 
yading@11:     av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
yading@11: 
yading@11:     ts_max=
yading@11:     ts_min= AV_NOPTS_VALUE;
yading@11:     pos_limit= -1; //gcc falsely says it may be uninitialized
yading@11: 
yading@11:     st= s->streams[stream_index];
yading@11:     if(st->index_entries){
yading@11:         AVIndexEntry *e;
yading@11: 
yading@11:         index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non-keyframe entries in index case, especially read_timestamp()
yading@11:         index= FFMAX(index, 0);
yading@11:         e= &st->index_entries[index];
yading@11: 
yading@11:         if(e->timestamp <= target_ts || e->pos == e->min_distance){
yading@11:             pos_min= e->pos;
yading@11:             ts_min= e->timestamp;
yading@11:             av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
yading@11:                     pos_min, av_ts2str(ts_min));
yading@11:         }else{
yading@11:             av_assert1(index==0);
yading@11:         }
yading@11: 
yading@11:         index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
yading@11:         av_assert0(index < st->nb_index_entries);
yading@11:         if(index >= 0){
yading@11:             e= &st->index_entries[index];
yading@11:             av_assert1(e->timestamp >= target_ts);
yading@11:             pos_max= e->pos;
yading@11:             ts_max= e->timestamp;
yading@11:             pos_limit= pos_max - e->min_distance;
yading@11:             av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
yading@11:                     pos_max, pos_limit, av_ts2str(ts_max));
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
yading@11:     if(pos<0)
yading@11:         return -1;
yading@11: 
yading@11:     /* do the seek */
yading@11:     if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
yading@11:         return ret;
yading@11: 
yading@11:     ff_read_frame_flush(s);
yading@11:     ff_update_cur_dts(s, st, ts);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
yading@11:                       int64_t pos_min, int64_t pos_max, int64_t pos_limit,
yading@11:                       int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
yading@11:                       int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
yading@11: {
yading@11:     int64_t pos, ts;
yading@11:     int64_t start_pos, filesize;
yading@11:     int no_change;
yading@11: 
yading@11:     av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
yading@11: 
yading@11:     if(ts_min == AV_NOPTS_VALUE){
yading@11:         pos_min = s->data_offset;
yading@11:         ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
yading@11:         if (ts_min == AV_NOPTS_VALUE)
yading@11:             return -1;
yading@11:     }
yading@11: 
yading@11:     if(ts_min >= target_ts){
yading@11:         *ts_ret= ts_min;
yading@11:         return pos_min;
yading@11:     }
yading@11: 
yading@11:     if(ts_max == AV_NOPTS_VALUE){
yading@11:         int step= 1024;
yading@11:         filesize = avio_size(s->pb);
yading@11:         pos_max = filesize - 1;
yading@11:         do{
yading@11:             pos_max = FFMAX(0, pos_max - step);
yading@11:             ts_max = ff_read_timestamp(s, stream_index, &pos_max, pos_max + step, read_timestamp);
yading@11:             step += step;
yading@11:         }while(ts_max == AV_NOPTS_VALUE && pos_max > 0);
yading@11:         if (ts_max == AV_NOPTS_VALUE)
yading@11:             return -1;
yading@11: 
yading@11:         for(;;){
yading@11:             int64_t tmp_pos= pos_max + 1;
yading@11:             int64_t tmp_ts= ff_read_timestamp(s, stream_index, &tmp_pos, INT64_MAX, read_timestamp);
yading@11:             if(tmp_ts == AV_NOPTS_VALUE)
yading@11:                 break;
yading@11:             ts_max= tmp_ts;
yading@11:             pos_max= tmp_pos;
yading@11:             if(tmp_pos >= filesize)
yading@11:                 break;
yading@11:         }
yading@11:         pos_limit= pos_max;
yading@11:     }
yading@11: 
yading@11:     if(ts_max <= target_ts){
yading@11:         *ts_ret= ts_max;
yading@11:         return pos_max;
yading@11:     }
yading@11: 
yading@11:     if(ts_min > ts_max){
yading@11:         return -1;
yading@11:     }else if(ts_min == ts_max){
yading@11:         pos_limit= pos_min;
yading@11:     }
yading@11: 
yading@11:     no_change=0;
yading@11:     while (pos_min < pos_limit) {
yading@11:         av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
yading@11:                 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
yading@11:         assert(pos_limit <= pos_max);
yading@11: 
yading@11:         if(no_change==0){
yading@11:             int64_t approximate_keyframe_distance= pos_max - pos_limit;
yading@11:             // interpolate position (better than dichotomy)
yading@11:             pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
yading@11:                 + pos_min - approximate_keyframe_distance;
yading@11:         }else if(no_change==1){
yading@11:             // bisection, if interpolation failed to change min or max pos last time
yading@11:             pos = (pos_min + pos_limit)>>1;
yading@11:         }else{
yading@11:             /* linear search if bisection failed, can only happen if there
yading@11:                are very few or no keyframes between min/max */
yading@11:             pos=pos_min;
yading@11:         }
yading@11:         if(pos <= pos_min)
yading@11:             pos= pos_min + 1;
yading@11:         else if(pos > pos_limit)
yading@11:             pos= pos_limit;
yading@11:         start_pos= pos;
yading@11: 
yading@11:         ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp); //may pass pos_limit instead of -1
yading@11:         if(pos == pos_max)
yading@11:             no_change++;
yading@11:         else
yading@11:             no_change=0;
yading@11:         av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
yading@11:                 pos_min, pos, pos_max,
yading@11:                 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
yading@11:                 pos_limit, start_pos, no_change);
yading@11:         if(ts == AV_NOPTS_VALUE){
yading@11:             av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
yading@11:             return -1;
yading@11:         }
yading@11:         assert(ts != AV_NOPTS_VALUE);
yading@11:         if (target_ts <= ts) {
yading@11:             pos_limit = start_pos - 1;
yading@11:             pos_max = pos;
yading@11:             ts_max = ts;
yading@11:         }
yading@11:         if (target_ts >= ts) {
yading@11:             pos_min = pos;
yading@11:             ts_min = ts;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
yading@11:     ts  = (flags & AVSEEK_FLAG_BACKWARD) ?  ts_min :  ts_max;
yading@11: #if 0
yading@11:     pos_min = pos;
yading@11:     ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
yading@11:     pos_min++;
yading@11:     ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
yading@11:     av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
yading@11:             pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
yading@11: #endif
yading@11:     *ts_ret= ts;
yading@11:     return pos;
yading@11: }
yading@11: 
yading@11: static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
yading@11:     int64_t pos_min, pos_max;
yading@11: 
yading@11:     pos_min = s->data_offset;
yading@11:     pos_max = avio_size(s->pb) - 1;
yading@11: 
yading@11:     if     (pos < pos_min) pos= pos_min;
yading@11:     else if(pos > pos_max) pos= pos_max;
yading@11: 
yading@11:     avio_seek(s->pb, pos, SEEK_SET);
yading@11: 
yading@11:     s->io_repositioned = 1;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int seek_frame_generic(AVFormatContext *s,
yading@11:                                  int stream_index, int64_t timestamp, int flags)
yading@11: {
yading@11:     int index;
yading@11:     int64_t ret;
yading@11:     AVStream *st;
yading@11:     AVIndexEntry *ie;
yading@11: 
yading@11:     st = s->streams[stream_index];
yading@11: 
yading@11:     index = av_index_search_timestamp(st, timestamp, flags);
yading@11: 
yading@11:     if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
yading@11:         return -1;
yading@11: 
yading@11:     if(index < 0 || index==st->nb_index_entries-1){
yading@11:         AVPacket pkt;
yading@11:         int nonkey=0;
yading@11: 
yading@11:         if(st->nb_index_entries){
yading@11:             av_assert0(st->index_entries);
yading@11:             ie= &st->index_entries[st->nb_index_entries-1];
yading@11:             if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
yading@11:                 return ret;
yading@11:             ff_update_cur_dts(s, st, ie->timestamp);
yading@11:         }else{
yading@11:             if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
yading@11:                 return ret;
yading@11:         }
yading@11:         for (;;) {
yading@11:             int read_status;
yading@11:             do{
yading@11:                 read_status = av_read_frame(s, &pkt);
yading@11:             } while (read_status == AVERROR(EAGAIN));
yading@11:             if (read_status < 0)
yading@11:                 break;
yading@11:             av_free_packet(&pkt);
yading@11:             if(stream_index == pkt.stream_index && pkt.dts > timestamp){
yading@11:                 if(pkt.flags & AV_PKT_FLAG_KEY)
yading@11:                     break;
yading@11:                 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
yading@11:                     av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey);
yading@11:                     break;
yading@11:                 }
yading@11:             }
yading@11:         }
yading@11:         index = av_index_search_timestamp(st, timestamp, flags);
yading@11:     }
yading@11:     if (index < 0)
yading@11:         return -1;
yading@11: 
yading@11:     ff_read_frame_flush(s);
yading@11:     if (s->iformat->read_seek){
yading@11:         if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
yading@11:             return 0;
yading@11:     }
yading@11:     ie = &st->index_entries[index];
yading@11:     if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
yading@11:         return ret;
yading@11:     ff_update_cur_dts(s, st, ie->timestamp);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int seek_frame_internal(AVFormatContext *s, int stream_index,
yading@11:                                int64_t timestamp, int flags)
yading@11: {
yading@11:     int ret;
yading@11:     AVStream *st;
yading@11: 
yading@11:     if (flags & AVSEEK_FLAG_BYTE) {
yading@11:         if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
yading@11:             return -1;
yading@11:         ff_read_frame_flush(s);
yading@11:         return seek_frame_byte(s, stream_index, timestamp, flags);
yading@11:     }
yading@11: 
yading@11:     if(stream_index < 0){
yading@11:         stream_index= av_find_default_stream_index(s);
yading@11:         if(stream_index < 0)
yading@11:             return -1;
yading@11: 
yading@11:         st= s->streams[stream_index];
yading@11:         /* timestamp for default must be expressed in AV_TIME_BASE units */
yading@11:         timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
yading@11:     }
yading@11: 
yading@11:     /* first, we try the format specific seek */
yading@11:     if (s->iformat->read_seek) {
yading@11:         ff_read_frame_flush(s);
yading@11:         ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
yading@11:     } else
yading@11:         ret = -1;
yading@11:     if (ret >= 0) {
yading@11:         return 0;
yading@11:     }
yading@11: 
yading@11:     if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
yading@11:         ff_read_frame_flush(s);
yading@11:         return ff_seek_frame_binary(s, stream_index, timestamp, flags);
yading@11:     } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
yading@11:         ff_read_frame_flush(s);
yading@11:         return seek_frame_generic(s, stream_index, timestamp, flags);
yading@11:     }
yading@11:     else
yading@11:         return -1;
yading@11: }
yading@11: 
yading@11: int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
yading@11: {
yading@11:     int ret = seek_frame_internal(s, stream_index, timestamp, flags);
yading@11: 
yading@11:     if (ret >= 0)
yading@11:         ret = avformat_queue_attached_pictures(s);
yading@11: 
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
yading@11: {
yading@11:     if(min_ts > ts || max_ts < ts)
yading@11:         return -1;
yading@11:     if (stream_index < -1 || stream_index >= (int)s->nb_streams)
yading@11:         return AVERROR(EINVAL);
yading@11: 
yading@11:     if(s->seek2any>0)
yading@11:         flags |= AVSEEK_FLAG_ANY;
yading@11: 
yading@11:     if (s->iformat->read_seek2) {
yading@11:         int ret;
yading@11:         ff_read_frame_flush(s);
yading@11: 
yading@11:         if (stream_index == -1 && s->nb_streams == 1) {
yading@11:             AVRational time_base = s->streams[0]->time_base;
yading@11:             ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
yading@11:             min_ts = av_rescale_rnd(min_ts, time_base.den,
yading@11:                                     time_base.num * (int64_t)AV_TIME_BASE,
yading@11:                                     AV_ROUND_UP   | AV_ROUND_PASS_MINMAX);
yading@11:             max_ts = av_rescale_rnd(max_ts, time_base.den,
yading@11:                                     time_base.num * (int64_t)AV_TIME_BASE,
yading@11:                                     AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
yading@11:         }
yading@11: 
yading@11:         ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
yading@11: 
yading@11:         if (ret >= 0)
yading@11:             ret = avformat_queue_attached_pictures(s);
yading@11:         return ret;
yading@11:     }
yading@11: 
yading@11:     if(s->iformat->read_timestamp){
yading@11:         //try to seek via read_timestamp()
yading@11:     }
yading@11: 
yading@11:     //Fallback to old API if new is not implemented but old is
yading@11:     //Note the old has somewhat different semantics
yading@11:     if (s->iformat->read_seek || 1) {
yading@11:         int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
yading@11:         int ret = av_seek_frame(s, stream_index, ts, flags | dir);
yading@11:         if (ret<0 && ts != min_ts && max_ts != ts) {
yading@11:             ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
yading@11:             if (ret >= 0)
yading@11:                 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
yading@11:         }
yading@11:         return ret;
yading@11:     }
yading@11: 
yading@11:     // try some generic seek like seek_frame_generic() but with new ts semantics
yading@11:     return -1; //unreachable
yading@11: }
yading@11: 
yading@11: /*******************************************************/
yading@11: 
yading@11: /**
yading@11:  * Return TRUE if the stream has accurate duration in any stream.
yading@11:  *
yading@11:  * @return TRUE if the stream has accurate duration for at least one component.
yading@11:  */
yading@11: static int has_duration(AVFormatContext *ic)
yading@11: {
yading@11:     int i;
yading@11:     AVStream *st;
yading@11: 
yading@11:     for(i = 0;i < ic->nb_streams; i++) {
yading@11:         st = ic->streams[i];
yading@11:         if (st->duration != AV_NOPTS_VALUE)
yading@11:             return 1;
yading@11:     }
yading@11:     if (ic->duration != AV_NOPTS_VALUE)
yading@11:         return 1;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Estimate the stream timings from the one of each components.
yading@11:  *
yading@11:  * Also computes the global bitrate if possible.
yading@11:  */
yading@11: static void update_stream_timings(AVFormatContext *ic)
yading@11: {
yading@11:     int64_t start_time, start_time1, start_time_text, end_time, end_time1;
yading@11:     int64_t duration, duration1, filesize;
yading@11:     int i;
yading@11:     AVStream *st;
yading@11:     AVProgram *p;
yading@11: 
yading@11:     start_time = INT64_MAX;
yading@11:     start_time_text = INT64_MAX;
yading@11:     end_time = INT64_MIN;
yading@11:     duration = INT64_MIN;
yading@11:     for(i = 0;i < ic->nb_streams; i++) {
yading@11:         st = ic->streams[i];
yading@11:         if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
yading@11:             start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
yading@11:             if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
yading@11:                 if (start_time1 < start_time_text)
yading@11:                     start_time_text = start_time1;
yading@11:             } else
yading@11:                 start_time = FFMIN(start_time, start_time1);
yading@11:             end_time1 = AV_NOPTS_VALUE;
yading@11:             if (st->duration != AV_NOPTS_VALUE) {
yading@11:                 end_time1 = start_time1
yading@11:                           + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
yading@11:                 end_time = FFMAX(end_time, end_time1);
yading@11:             }
yading@11:             for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
yading@11:                 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
yading@11:                     p->start_time = start_time1;
yading@11:                 if(p->end_time < end_time1)
yading@11:                     p->end_time = end_time1;
yading@11:             }
yading@11:         }
yading@11:         if (st->duration != AV_NOPTS_VALUE) {
yading@11:             duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
yading@11:             duration = FFMAX(duration, duration1);
yading@11:         }
yading@11:     }
yading@11:     if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
yading@11:         start_time = start_time_text;
yading@11:     else if(start_time > start_time_text)
yading@11:         av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
yading@11: 
yading@11:     if (start_time != INT64_MAX) {
yading@11:         ic->start_time = start_time;
yading@11:         if (end_time != INT64_MIN) {
yading@11:             if (ic->nb_programs) {
yading@11:                 for (i=0; i<ic->nb_programs; i++) {
yading@11:                     p = ic->programs[i];
yading@11:                     if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
yading@11:                         duration = FFMAX(duration, p->end_time - p->start_time);
yading@11:                 }
yading@11:             } else
yading@11:                 duration = FFMAX(duration, end_time - start_time);
yading@11:         }
yading@11:     }
yading@11:     if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
yading@11:         ic->duration = duration;
yading@11:     }
yading@11:         if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
yading@11:             /* compute the bitrate */
yading@11:             double bitrate = (double)filesize * 8.0 * AV_TIME_BASE /
yading@11:                 (double)ic->duration;
yading@11:             if (bitrate >= 0 && bitrate <= INT_MAX)
yading@11:                 ic->bit_rate = bitrate;
yading@11:         }
yading@11: }
yading@11: 
yading@11: static void fill_all_stream_timings(AVFormatContext *ic)
yading@11: {
yading@11:     int i;
yading@11:     AVStream *st;
yading@11: 
yading@11:     update_stream_timings(ic);
yading@11:     for(i = 0;i < ic->nb_streams; i++) {
yading@11:         st = ic->streams[i];
yading@11:         if (st->start_time == AV_NOPTS_VALUE) {
yading@11:             if(ic->start_time != AV_NOPTS_VALUE)
yading@11:                 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
yading@11:             if(ic->duration != AV_NOPTS_VALUE)
yading@11:                 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
yading@11:         }
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void estimate_timings_from_bit_rate(AVFormatContext *ic)
yading@11: {
yading@11:     int64_t filesize, duration;
yading@11:     int bit_rate, i, show_warning = 0;
yading@11:     AVStream *st;
yading@11: 
yading@11:     /* if bit_rate is already set, we believe it */
yading@11:     if (ic->bit_rate <= 0) {
yading@11:         bit_rate = 0;
yading@11:         for(i=0;i<ic->nb_streams;i++) {
yading@11:             st = ic->streams[i];
yading@11:             if (st->codec->bit_rate > 0)
yading@11:             bit_rate += st->codec->bit_rate;
yading@11:         }
yading@11:         ic->bit_rate = bit_rate;
yading@11:     }
yading@11: 
yading@11:     /* if duration is already set, we believe it */
yading@11:     if (ic->duration == AV_NOPTS_VALUE &&
yading@11:         ic->bit_rate != 0) {
yading@11:         filesize = ic->pb ? avio_size(ic->pb) : 0;
yading@11:         if (filesize > 0) {
yading@11:             for(i = 0; i < ic->nb_streams; i++) {
yading@11:                 st = ic->streams[i];
yading@11:                 if (   st->time_base.num <= INT64_MAX / ic->bit_rate
yading@11:                     && st->duration == AV_NOPTS_VALUE) {
yading@11:                     duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
yading@11:                     st->duration = duration;
yading@11:                     show_warning = 1;
yading@11:                 }
yading@11:             }
yading@11:         }
yading@11:     }
yading@11:     if (show_warning)
yading@11:         av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
yading@11: }
yading@11: 
yading@11: #define DURATION_MAX_READ_SIZE 250000LL
yading@11: #define DURATION_MAX_RETRY 4
yading@11: 
yading@11: /* only usable for MPEG-PS streams */
yading@11: static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
yading@11: {
yading@11:     AVPacket pkt1, *pkt = &pkt1;
yading@11:     AVStream *st;
yading@11:     int read_size, i, ret;
yading@11:     int64_t end_time;
yading@11:     int64_t filesize, offset, duration;
yading@11:     int retry=0;
yading@11: 
yading@11:     /* flush packet queue */
yading@11:     flush_packet_queue(ic);
yading@11: 
yading@11:     for (i=0; i<ic->nb_streams; i++) {
yading@11:         st = ic->streams[i];
yading@11:         if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
yading@11:             av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
yading@11: 
yading@11:         if (st->parser) {
yading@11:             av_parser_close(st->parser);
yading@11:             st->parser= NULL;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     /* estimate the end time (duration) */
yading@11:     /* XXX: may need to support wrapping */
yading@11:     filesize = ic->pb ? avio_size(ic->pb) : 0;
yading@11:     end_time = AV_NOPTS_VALUE;
yading@11:     do{
yading@11:         offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
yading@11:         if (offset < 0)
yading@11:             offset = 0;
yading@11: 
yading@11:         avio_seek(ic->pb, offset, SEEK_SET);
yading@11:         read_size = 0;
yading@11:         for(;;) {
yading@11:             if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
yading@11:                 break;
yading@11: 
yading@11:             do {
yading@11:                 ret = ff_read_packet(ic, pkt);
yading@11:             } while(ret == AVERROR(EAGAIN));
yading@11:             if (ret != 0)
yading@11:                 break;
yading@11:             read_size += pkt->size;
yading@11:             st = ic->streams[pkt->stream_index];
yading@11:             if (pkt->pts != AV_NOPTS_VALUE &&
yading@11:                 (st->start_time != AV_NOPTS_VALUE ||
yading@11:                  st->first_dts  != AV_NOPTS_VALUE)) {
yading@11:                 duration = end_time = pkt->pts;
yading@11:                 if (st->start_time != AV_NOPTS_VALUE)
yading@11:                     duration -= st->start_time;
yading@11:                 else
yading@11:                     duration -= st->first_dts;
yading@11:                 if (duration > 0) {
yading@11:                     if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<=0 ||
yading@11:                         (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
yading@11:                         st->duration = duration;
yading@11:                     st->info->last_duration = duration;
yading@11:                 }
yading@11:             }
yading@11:             av_free_packet(pkt);
yading@11:         }
yading@11:     }while(   end_time==AV_NOPTS_VALUE
yading@11:            && filesize > (DURATION_MAX_READ_SIZE<<retry)
yading@11:            && ++retry <= DURATION_MAX_RETRY);
yading@11: 
yading@11:     fill_all_stream_timings(ic);
yading@11: 
yading@11:     avio_seek(ic->pb, old_offset, SEEK_SET);
yading@11:     for (i=0; i<ic->nb_streams; i++) {
yading@11:         st= ic->streams[i];
yading@11:         st->cur_dts= st->first_dts;
yading@11:         st->last_IP_pts = AV_NOPTS_VALUE;
yading@11:         st->reference_dts = AV_NOPTS_VALUE;
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
yading@11: {
yading@11:     int64_t file_size;
yading@11: 
yading@11:     /* get the file size, if possible */
yading@11:     if (ic->iformat->flags & AVFMT_NOFILE) {
yading@11:         file_size = 0;
yading@11:     } else {
yading@11:         file_size = avio_size(ic->pb);
yading@11:         file_size = FFMAX(0, file_size);
yading@11:     }
yading@11: 
yading@11:     if ((!strcmp(ic->iformat->name, "mpeg") ||
yading@11:          !strcmp(ic->iformat->name, "mpegts")) &&
yading@11:         file_size && ic->pb->seekable) {
yading@11:         /* get accurate estimate from the PTSes */
yading@11:         estimate_timings_from_pts(ic, old_offset);
yading@11:         ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
yading@11:     } else if (has_duration(ic)) {
yading@11:         /* at least one component has timings - we use them for all
yading@11:            the components */
yading@11:         fill_all_stream_timings(ic);
yading@11:         ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
yading@11:     } else {
yading@11:         /* less precise: use bitrate info */
yading@11:         estimate_timings_from_bit_rate(ic);
yading@11:         ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
yading@11:     }
yading@11:     update_stream_timings(ic);
yading@11: 
yading@11:     {
yading@11:         int i;
yading@11:         AVStream av_unused *st;
yading@11:         for(i = 0;i < ic->nb_streams; i++) {
yading@11:             st = ic->streams[i];
yading@11:             av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
yading@11:                     (double) st->start_time / AV_TIME_BASE,
yading@11:                     (double) st->duration   / AV_TIME_BASE);
yading@11:         }
yading@11:         av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
yading@11:                 (double) ic->start_time / AV_TIME_BASE,
yading@11:                 (double) ic->duration   / AV_TIME_BASE,
yading@11:                 ic->bit_rate / 1000);
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
yading@11: {
yading@11:     AVCodecContext *avctx = st->codec;
yading@11: 
yading@11: #define FAIL(errmsg) do {                                         \
yading@11:         if (errmsg_ptr)                                           \
yading@11:             *errmsg_ptr = errmsg;                                 \
yading@11:         return 0;                                                 \
yading@11:     } while (0)
yading@11: 
yading@11:     switch (avctx->codec_type) {
yading@11:     case AVMEDIA_TYPE_AUDIO:
yading@11:         if (!avctx->frame_size && determinable_frame_size(avctx))
yading@11:             FAIL("unspecified frame size");
yading@11:         if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
yading@11:             FAIL("unspecified sample format");
yading@11:         if (!avctx->sample_rate)
yading@11:             FAIL("unspecified sample rate");
yading@11:         if (!avctx->channels)
yading@11:             FAIL("unspecified number of channels");
yading@11:         if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
yading@11:             FAIL("no decodable DTS frames");
yading@11:         break;
yading@11:     case AVMEDIA_TYPE_VIDEO:
yading@11:         if (!avctx->width)
yading@11:             FAIL("unspecified size");
yading@11:         if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
yading@11:             FAIL("unspecified pixel format");
yading@11:         if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40)
yading@11:             if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames)
yading@11:                 FAIL("no frame in rv30/40 and no sar");
yading@11:         break;
yading@11:     case AVMEDIA_TYPE_SUBTITLE:
yading@11:         if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
yading@11:             FAIL("unspecified size");
yading@11:         break;
yading@11:     case AVMEDIA_TYPE_DATA:
yading@11:         if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
yading@11:     }
yading@11: 
yading@11:     if (avctx->codec_id == AV_CODEC_ID_NONE)
yading@11:         FAIL("unknown codec");
yading@11:     return 1;
yading@11: }
yading@11: 
yading@11: /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
yading@11: static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
yading@11: {
yading@11:     const AVCodec *codec;
yading@11:     int got_picture = 1, ret = 0;
yading@11:     AVFrame *frame = avcodec_alloc_frame();
yading@11:     AVSubtitle subtitle;
yading@11:     AVPacket pkt = *avpkt;
yading@11: 
yading@11:     if (!frame)
yading@11:         return AVERROR(ENOMEM);
yading@11: 
yading@11:     if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
yading@11:         AVDictionary *thread_opt = NULL;
yading@11: 
yading@11:         codec = st->codec->codec ? st->codec->codec :
yading@11:                                    avcodec_find_decoder(st->codec->codec_id);
yading@11: 
yading@11:         if (!codec) {
yading@11:             st->info->found_decoder = -1;
yading@11:             ret = -1;
yading@11:             goto fail;
yading@11:         }
yading@11: 
yading@11:         /* force thread count to 1 since the h264 decoder will not extract SPS
yading@11:          *  and PPS to extradata during multi-threaded decoding */
yading@11:         av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
yading@11:         ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
yading@11:         if (!options)
yading@11:             av_dict_free(&thread_opt);
yading@11:         if (ret < 0) {
yading@11:             st->info->found_decoder = -1;
yading@11:             goto fail;
yading@11:         }
yading@11:         st->info->found_decoder = 1;
yading@11:     } else if (!st->info->found_decoder)
yading@11:         st->info->found_decoder = 1;
yading@11: 
yading@11:     if (st->info->found_decoder < 0) {
yading@11:         ret = -1;
yading@11:         goto fail;
yading@11:     }
yading@11: 
yading@11:     while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
yading@11:            ret >= 0 &&
yading@11:            (!has_codec_parameters(st, NULL)   ||
yading@11:            !has_decode_delay_been_guessed(st) ||
yading@11:            (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
yading@11:         got_picture = 0;
yading@11:         avcodec_get_frame_defaults(frame);
yading@11:         switch(st->codec->codec_type) {
yading@11:         case AVMEDIA_TYPE_VIDEO:
yading@11:             ret = avcodec_decode_video2(st->codec, frame,
yading@11:                                         &got_picture, &pkt);
yading@11:             break;
yading@11:         case AVMEDIA_TYPE_AUDIO:
yading@11:             ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
yading@11:             break;
yading@11:         case AVMEDIA_TYPE_SUBTITLE:
yading@11:             ret = avcodec_decode_subtitle2(st->codec, &subtitle,
yading@11:                                            &got_picture, &pkt);
yading@11:             ret = pkt.size;
yading@11:             break;
yading@11:         default:
yading@11:             break;
yading@11:         }
yading@11:         if (ret >= 0) {
yading@11:             if (got_picture)
yading@11:                 st->nb_decoded_frames++;
yading@11:             pkt.data += ret;
yading@11:             pkt.size -= ret;
yading@11:             ret       = got_picture;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if(!pkt.data && !got_picture)
yading@11:         ret = -1;
yading@11: 
yading@11: fail:
yading@11:     avcodec_free_frame(&frame);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
yading@11: {
yading@11:     while (tags->id != AV_CODEC_ID_NONE) {
yading@11:         if (tags->id == id)
yading@11:             return tags->tag;
yading@11:         tags++;
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
yading@11: {
yading@11:     int i;
yading@11:     for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
yading@11:         if(tag == tags[i].tag)
yading@11:             return tags[i].id;
yading@11:     }
yading@11:     for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
yading@11:         if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
yading@11:             return tags[i].id;
yading@11:     }
yading@11:     return AV_CODEC_ID_NONE;
yading@11: }
yading@11: 
yading@11: enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
yading@11: {
yading@11:     if (flt) {
yading@11:         switch (bps) {
yading@11:         case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
yading@11:         case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
yading@11:         default: return AV_CODEC_ID_NONE;
yading@11:         }
yading@11:     } else {
yading@11:         bps  += 7;
yading@11:         bps >>= 3;
yading@11:         if (sflags & (1 << (bps - 1))) {
yading@11:             switch (bps) {
yading@11:             case 1:  return AV_CODEC_ID_PCM_S8;
yading@11:             case 2:  return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
yading@11:             case 3:  return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
yading@11:             case 4:  return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
yading@11:             default: return AV_CODEC_ID_NONE;
yading@11:             }
yading@11:         } else {
yading@11:             switch (bps) {
yading@11:             case 1:  return AV_CODEC_ID_PCM_U8;
yading@11:             case 2:  return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
yading@11:             case 3:  return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
yading@11:             case 4:  return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
yading@11:             default: return AV_CODEC_ID_NONE;
yading@11:             }
yading@11:         }
yading@11:     }
yading@11: }
yading@11: 
yading@11: unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
yading@11: {
yading@11:     unsigned int tag;
yading@11:     if (!av_codec_get_tag2(tags, id, &tag))
yading@11:         return 0;
yading@11:     return tag;
yading@11: }
yading@11: 
yading@11: int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
yading@11:                       unsigned int *tag)
yading@11: {
yading@11:     int i;
yading@11:     for(i=0; tags && tags[i]; i++){
yading@11:         const AVCodecTag *codec_tags = tags[i];
yading@11:         while (codec_tags->id != AV_CODEC_ID_NONE) {
yading@11:             if (codec_tags->id == id) {
yading@11:                 *tag = codec_tags->tag;
yading@11:                 return 1;
yading@11:             }
yading@11:             codec_tags++;
yading@11:         }
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
yading@11: {
yading@11:     int i;
yading@11:     for(i=0; tags && tags[i]; i++){
yading@11:         enum AVCodecID id= ff_codec_get_id(tags[i], tag);
yading@11:         if(id!=AV_CODEC_ID_NONE) return id;
yading@11:     }
yading@11:     return AV_CODEC_ID_NONE;
yading@11: }
yading@11: 
yading@11: static void compute_chapters_end(AVFormatContext *s)
yading@11: {
yading@11:     unsigned int i, j;
yading@11:     int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
yading@11: 
yading@11:     for (i = 0; i < s->nb_chapters; i++)
yading@11:         if (s->chapters[i]->end == AV_NOPTS_VALUE) {
yading@11:             AVChapter *ch = s->chapters[i];
yading@11:             int64_t   end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
yading@11:                                      : INT64_MAX;
yading@11: 
yading@11:             for (j = 0; j < s->nb_chapters; j++) {
yading@11:                 AVChapter *ch1 = s->chapters[j];
yading@11:                 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
yading@11:                 if (j != i && next_start > ch->start && next_start < end)
yading@11:                     end = next_start;
yading@11:             }
yading@11:             ch->end = (end == INT64_MAX) ? ch->start : end;
yading@11:         }
yading@11: }
yading@11: 
yading@11: static int get_std_framerate(int i){
yading@11:     if(i<60*12) return (i+1)*1001;
yading@11:     else        return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
yading@11: }
yading@11: 
yading@11: /*
yading@11:  * Is the time base unreliable.
yading@11:  * This is a heuristic to balance between quick acceptance of the values in
yading@11:  * the headers vs. some extra checks.
yading@11:  * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
yading@11:  * MPEG-2 commonly misuses field repeat flags to store different framerates.
yading@11:  * And there are "variable" fps files this needs to detect as well.
yading@11:  */
yading@11: static int tb_unreliable(AVCodecContext *c){
yading@11:     if(   c->time_base.den >= 101L*c->time_base.num
yading@11:        || c->time_base.den <    5L*c->time_base.num
yading@11: /*       || c->codec_tag == AV_RL32("DIVX")
yading@11:        || c->codec_tag == AV_RL32("XVID")*/
yading@11:        || c->codec_tag == AV_RL32("mp4v")
yading@11:        || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
yading@11:        || c->codec_id == AV_CODEC_ID_H264
yading@11:        )
yading@11:         return 1;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: #if FF_API_FORMAT_PARAMETERS
yading@11: int av_find_stream_info(AVFormatContext *ic)
yading@11: {
yading@11:     return avformat_find_stream_info(ic, NULL);
yading@11: }
yading@11: #endif
yading@11: 
yading@11: int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
yading@11: {
yading@11:     int i, count, ret, j;
yading@11:     int64_t read_size;
yading@11:     AVStream *st;
yading@11:     AVPacket pkt1, *pkt;
yading@11:     int64_t old_offset = avio_tell(ic->pb);
yading@11:     int orig_nb_streams = ic->nb_streams;        // new streams might appear, no options for those
yading@11:     int flush_codecs = ic->probesize > 0;
yading@11: 
yading@11:     if(ic->pb)
yading@11:         av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
yading@11: 
yading@11:     for(i=0;i<ic->nb_streams;i++) {
yading@11:         const AVCodec *codec;
yading@11:         AVDictionary *thread_opt = NULL;
yading@11:         st = ic->streams[i];
yading@11: 
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
yading@11:             st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
yading@11: /*            if(!st->time_base.num)
yading@11:                 st->time_base= */
yading@11:             if(!st->codec->time_base.num)
yading@11:                 st->codec->time_base= st->time_base;
yading@11:         }
yading@11:         //only for the split stuff
yading@11:         if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
yading@11:             st->parser = av_parser_init(st->codec->codec_id);
yading@11:             if(st->parser){
yading@11:                 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
yading@11:                     st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
yading@11:                 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
yading@11:                     st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
yading@11:                 }
yading@11:             } else if (st->need_parsing) {
yading@11:                 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
yading@11:                        "%s, packets or times may be invalid.\n",
yading@11:                        avcodec_get_name(st->codec->codec_id));
yading@11:             }
yading@11:         }
yading@11:         codec = st->codec->codec ? st->codec->codec :
yading@11:                                    avcodec_find_decoder(st->codec->codec_id);
yading@11: 
yading@11:         /* force thread count to 1 since the h264 decoder will not extract SPS
yading@11:          *  and PPS to extradata during multi-threaded decoding */
yading@11:         av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
yading@11: 
yading@11:         /* Ensure that subtitle_header is properly set. */
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
yading@11:             && codec && !st->codec->codec)
yading@11:             avcodec_open2(st->codec, codec, options ? &options[i]
yading@11:                               : &thread_opt);
yading@11: 
yading@11:         //try to just open decoders, in case this is enough to get parameters
yading@11:         if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
yading@11:             if (codec && !st->codec->codec)
yading@11:                 avcodec_open2(st->codec, codec, options ? &options[i]
yading@11:                               : &thread_opt);
yading@11:         }
yading@11:         if (!options)
yading@11:             av_dict_free(&thread_opt);
yading@11:     }
yading@11: 
yading@11:     for (i=0; i<ic->nb_streams; i++) {
yading@11: #if FF_API_R_FRAME_RATE
yading@11:         ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
yading@11: #endif
yading@11:         ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
yading@11:         ic->streams[i]->info->fps_last_dts  = AV_NOPTS_VALUE;
yading@11:     }
yading@11: 
yading@11:     count = 0;
yading@11:     read_size = 0;
yading@11:     for(;;) {
yading@11:         if (ff_check_interrupt(&ic->interrupt_callback)){
yading@11:             ret= AVERROR_EXIT;
yading@11:             av_log(ic, AV_LOG_DEBUG, "interrupted\n");
yading@11:             break;
yading@11:         }
yading@11: 
yading@11:         /* check if one codec still needs to be handled */
yading@11:         for(i=0;i<ic->nb_streams;i++) {
yading@11:             int fps_analyze_framecount = 20;
yading@11: 
yading@11:             st = ic->streams[i];
yading@11:             if (!has_codec_parameters(st, NULL))
yading@11:                 break;
yading@11:             /* if the timebase is coarse (like the usual millisecond precision
yading@11:                of mkv), we need to analyze more frames to reliably arrive at
yading@11:                the correct fps */
yading@11:             if (av_q2d(st->time_base) > 0.0005)
yading@11:                 fps_analyze_framecount *= 2;
yading@11:             if (ic->fps_probe_size >= 0)
yading@11:                 fps_analyze_framecount = ic->fps_probe_size;
yading@11:             if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
yading@11:                 fps_analyze_framecount = 0;
yading@11:             /* variable fps and no guess at the real fps */
yading@11:             if(   tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
yading@11:                && st->info->duration_count < fps_analyze_framecount
yading@11:                && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
yading@11:                 break;
yading@11:             if(st->parser && st->parser->parser->split && !st->codec->extradata)
yading@11:                 break;
yading@11:             if (st->first_dts == AV_NOPTS_VALUE &&
yading@11:                 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
yading@11:                  st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
yading@11:                 break;
yading@11:         }
yading@11:         if (i == ic->nb_streams) {
yading@11:             /* NOTE: if the format has no header, then we need to read
yading@11:                some packets to get most of the streams, so we cannot
yading@11:                stop here */
yading@11:             if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
yading@11:                 /* if we found the info for all the codecs, we can stop */
yading@11:                 ret = count;
yading@11:                 av_log(ic, AV_LOG_DEBUG, "All info found\n");
yading@11:                 flush_codecs = 0;
yading@11:                 break;
yading@11:             }
yading@11:         }
yading@11:         /* we did not get all the codec info, but we read too much data */
yading@11:         if (read_size >= ic->probesize) {
yading@11:             ret = count;
yading@11:             av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit of %d bytes reached\n", ic->probesize);
yading@11:             for (i = 0; i < ic->nb_streams; i++)
yading@11:                 if (!ic->streams[i]->r_frame_rate.num &&
yading@11:                     ic->streams[i]->info->duration_count <= 1)
yading@11:                     av_log(ic, AV_LOG_WARNING,
yading@11:                            "Stream #%d: not enough frames to estimate rate; "
yading@11:                            "consider increasing probesize\n", i);
yading@11:             break;
yading@11:         }
yading@11: 
yading@11:         /* NOTE: a new stream can be added there if no header in file
yading@11:            (AVFMTCTX_NOHEADER) */
yading@11:         ret = read_frame_internal(ic, &pkt1);
yading@11:         if (ret == AVERROR(EAGAIN))
yading@11:             continue;
yading@11: 
yading@11:         if (ret < 0) {
yading@11:             /* EOF or error*/
yading@11:             break;
yading@11:         }
yading@11: 
yading@11:         if (ic->flags & AVFMT_FLAG_NOBUFFER) {
yading@11:             pkt = &pkt1;
yading@11:         } else {
yading@11:             pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
yading@11:                                 &ic->packet_buffer_end);
yading@11:             if ((ret = av_dup_packet(pkt)) < 0)
yading@11:                 goto find_stream_info_err;
yading@11:         }
yading@11: 
yading@11:         read_size += pkt->size;
yading@11: 
yading@11:         st = ic->streams[pkt->stream_index];
yading@11:         if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
yading@11:             /* check for non-increasing dts */
yading@11:             if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
yading@11:                 st->info->fps_last_dts >= pkt->dts) {
yading@11:                 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
yading@11:                        "packet %d with DTS %"PRId64", packet %d with DTS "
yading@11:                        "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
yading@11:                        st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
yading@11:                 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
yading@11:             }
yading@11:             /* check for a discontinuity in dts - if the difference in dts
yading@11:              * is more than 1000 times the average packet duration in the sequence,
yading@11:              * we treat it as a discontinuity */
yading@11:             if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
yading@11:                 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
yading@11:                 (pkt->dts - st->info->fps_last_dts) / 1000 >
yading@11:                 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
yading@11:                 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
yading@11:                        "packet %d with DTS %"PRId64", packet %d with DTS "
yading@11:                        "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
yading@11:                        st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
yading@11:                 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
yading@11:             }
yading@11: 
yading@11:             /* update stored dts values */
yading@11:             if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
yading@11:                 st->info->fps_first_dts     = pkt->dts;
yading@11:                 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
yading@11:             }
yading@11:             st->info->fps_last_dts = pkt->dts;
yading@11:             st->info->fps_last_dts_idx = st->codec_info_nb_frames;
yading@11:         }
yading@11:         if (st->codec_info_nb_frames>1) {
yading@11:             int64_t t=0;
yading@11:             if (st->time_base.den > 0)
yading@11:                 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
yading@11:             if (st->avg_frame_rate.num > 0)
yading@11:                 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
yading@11: 
yading@11:             if (t >= ic->max_analyze_duration) {
yading@11:                 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64" microseconds\n", ic->max_analyze_duration, t);
yading@11:                 break;
yading@11:             }
yading@11:             if (pkt->duration) {
yading@11:                 st->info->codec_info_duration        += pkt->duration;
yading@11:                 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
yading@11:             }
yading@11:         }
yading@11: #if FF_API_R_FRAME_RATE
yading@11:         {
yading@11:             int64_t last = st->info->last_dts;
yading@11: 
yading@11:             if(   pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last
yading@11:                && pkt->dts - (uint64_t)last < INT64_MAX){
yading@11:                 double dts= (is_relative(pkt->dts) ?  pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
yading@11:                 int64_t duration= pkt->dts - last;
yading@11: 
yading@11:                 if (!st->info->duration_error)
yading@11:                     st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
yading@11: 
yading@11: //                 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
yading@11: //                     av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
yading@11:                 for (i=0; i<MAX_STD_TIMEBASES; i++) {
yading@11:                     int framerate= get_std_framerate(i);
yading@11:                     double sdts= dts*framerate/(1001*12);
yading@11:                     for(j=0; j<2; j++){
yading@11:                         int64_t ticks= llrint(sdts+j*0.5);
yading@11:                         double error= sdts - ticks + j*0.5;
yading@11:                         st->info->duration_error[j][0][i] += error;
yading@11:                         st->info->duration_error[j][1][i] += error*error;
yading@11:                     }
yading@11:                 }
yading@11:                 st->info->duration_count++;
yading@11:                 // ignore the first 4 values, they might have some random jitter
yading@11:                 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
yading@11:                     st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
yading@11:             }
yading@11:             if (pkt->dts != AV_NOPTS_VALUE)
yading@11:                 st->info->last_dts = pkt->dts;
yading@11:         }
yading@11: #endif
yading@11:         if(st->parser && st->parser->parser->split && !st->codec->extradata){
yading@11:             int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
yading@11:             if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
yading@11:                 st->codec->extradata_size= i;
yading@11:                 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
yading@11:                 if (!st->codec->extradata)
yading@11:                     return AVERROR(ENOMEM);
yading@11:                 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
yading@11:                 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         /* if still no information, we try to open the codec and to
yading@11:            decompress the frame. We try to avoid that in most cases as
yading@11:            it takes longer and uses more memory. For MPEG-4, we need to
yading@11:            decompress for QuickTime.
yading@11: 
yading@11:            If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
yading@11:            least one frame of codec data, this makes sure the codec initializes
yading@11:            the channel configuration and does not only trust the values from the container.
yading@11:         */
yading@11:         try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
yading@11: 
yading@11:         st->codec_info_nb_frames++;
yading@11:         count++;
yading@11:     }
yading@11: 
yading@11:     if (flush_codecs) {
yading@11:         AVPacket empty_pkt = { 0 };
yading@11:         int err = 0;
yading@11:         av_init_packet(&empty_pkt);
yading@11: 
yading@11:         ret = -1; /* we could not have all the codec parameters before EOF */
yading@11:         for(i=0;i<ic->nb_streams;i++) {
yading@11:             const char *errmsg;
yading@11: 
yading@11:             st = ic->streams[i];
yading@11: 
yading@11:             /* flush the decoders */
yading@11:             if (st->info->found_decoder == 1) {
yading@11:                 do {
yading@11:                     err = try_decode_frame(st, &empty_pkt,
yading@11:                                             (options && i < orig_nb_streams) ?
yading@11:                                             &options[i] : NULL);
yading@11:                 } while (err > 0 && !has_codec_parameters(st, NULL));
yading@11: 
yading@11:                 if (err < 0) {
yading@11:                     av_log(ic, AV_LOG_INFO,
yading@11:                         "decoding for stream %d failed\n", st->index);
yading@11:                 }
yading@11:             }
yading@11: 
yading@11:             if (!has_codec_parameters(st, &errmsg)) {
yading@11:                 char buf[256];
yading@11:                 avcodec_string(buf, sizeof(buf), st->codec, 0);
yading@11:                 av_log(ic, AV_LOG_WARNING,
yading@11:                        "Could not find codec parameters for stream %d (%s): %s\n"
yading@11:                        "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
yading@11:                        i, buf, errmsg);
yading@11:             } else {
yading@11:                 ret = 0;
yading@11:             }
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     // close codecs which were opened in try_decode_frame()
yading@11:     for(i=0;i<ic->nb_streams;i++) {
yading@11:         st = ic->streams[i];
yading@11:         avcodec_close(st->codec);
yading@11:     }
yading@11:     for(i=0;i<ic->nb_streams;i++) {
yading@11:         st = ic->streams[i];
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
yading@11:             if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
yading@11:                 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
yading@11:                 if (avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
yading@11:                     st->codec->codec_tag= tag;
yading@11:             }
yading@11: 
yading@11:             /* estimate average framerate if not set by demuxer */
yading@11:             if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
yading@11:                 int      best_fps = 0;
yading@11:                 double best_error = 0.01;
yading@11: 
yading@11:                 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
yading@11:                           st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
yading@11:                           st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
yading@11: 
yading@11:                 /* round guessed framerate to a "standard" framerate if it's
yading@11:                  * within 1% of the original estimate*/
yading@11:                 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
yading@11:                     AVRational std_fps = { get_std_framerate(j), 12*1001 };
yading@11:                     double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
yading@11: 
yading@11:                     if (error < best_error) {
yading@11:                         best_error = error;
yading@11:                         best_fps   = std_fps.num;
yading@11:                     }
yading@11:                 }
yading@11:                 if (best_fps) {
yading@11:                     av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
yading@11:                               best_fps, 12*1001, INT_MAX);
yading@11:                 }
yading@11:             }
yading@11:             // the check for tb_unreliable() is not completely correct, since this is not about handling
yading@11:             // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
yading@11:             // ipmovie.c produces.
yading@11:             if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num)
yading@11:                 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX);
yading@11:             if (st->info->duration_count>1 && !st->r_frame_rate.num
yading@11:                 && tb_unreliable(st->codec)) {
yading@11:                 int num = 0;
yading@11:                 double best_error= 0.01;
yading@11: 
yading@11:                 for (j=0; j<MAX_STD_TIMEBASES; j++) {
yading@11:                     int k;
yading@11: 
yading@11:                     if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
yading@11:                         continue;
yading@11:                     if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
yading@11:                         continue;
yading@11:                     for(k=0; k<2; k++){
yading@11:                         int n= st->info->duration_count;
yading@11:                         double a= st->info->duration_error[k][0][j] / n;
yading@11:                         double error= st->info->duration_error[k][1][j]/n - a*a;
yading@11: 
yading@11:                         if(error < best_error && best_error> 0.000000001){
yading@11:                             best_error= error;
yading@11:                             num = get_std_framerate(j);
yading@11:                         }
yading@11:                         if(error < 0.02)
yading@11:                             av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
yading@11:                     }
yading@11:                 }
yading@11:                 // do not increase frame rate by more than 1 % in order to match a standard rate.
yading@11:                 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
yading@11:                     av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
yading@11:             }
yading@11: 
yading@11:             if (!st->r_frame_rate.num){
yading@11:                 if(    st->codec->time_base.den * (int64_t)st->time_base.num
yading@11:                     <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
yading@11:                     st->r_frame_rate.num = st->codec->time_base.den;
yading@11:                     st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
yading@11:                 }else{
yading@11:                     st->r_frame_rate.num = st->time_base.den;
yading@11:                     st->r_frame_rate.den = st->time_base.num;
yading@11:                 }
yading@11:             }
yading@11:         }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
yading@11:             if(!st->codec->bits_per_coded_sample)
yading@11:                 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
yading@11:             // set stream disposition based on audio service type
yading@11:             switch (st->codec->audio_service_type) {
yading@11:             case AV_AUDIO_SERVICE_TYPE_EFFECTS:
yading@11:                 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;    break;
yading@11:             case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
yading@11:                 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;  break;
yading@11:             case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
yading@11:                 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
yading@11:             case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
yading@11:                 st->disposition = AV_DISPOSITION_COMMENT;          break;
yading@11:             case AV_AUDIO_SERVICE_TYPE_KARAOKE:
yading@11:                 st->disposition = AV_DISPOSITION_KARAOKE;          break;
yading@11:             }
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if(ic->probesize)
yading@11:     estimate_timings(ic, old_offset);
yading@11: 
yading@11:     compute_chapters_end(ic);
yading@11: 
yading@11:  find_stream_info_err:
yading@11:     for (i=0; i < ic->nb_streams; i++) {
yading@11:         st = ic->streams[i];
yading@11:         if (ic->streams[i]->codec)
yading@11:             ic->streams[i]->codec->thread_count = 0;
yading@11:         if (st->info)
yading@11:             av_freep(&st->info->duration_error);
yading@11:         av_freep(&ic->streams[i]->info);
yading@11:     }
yading@11:     if(ic->pb)
yading@11:         av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
yading@11: {
yading@11:     int i, j;
yading@11: 
yading@11:     for (i = 0; i < ic->nb_programs; i++) {
yading@11:         if (ic->programs[i] == last) {
yading@11:             last = NULL;
yading@11:         } else {
yading@11:             if (!last)
yading@11:                 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
yading@11:                     if (ic->programs[i]->stream_index[j] == s)
yading@11:                         return ic->programs[i];
yading@11:         }
yading@11:     }
yading@11:     return NULL;
yading@11: }
yading@11: 
yading@11: int av_find_best_stream(AVFormatContext *ic,
yading@11:                         enum AVMediaType type,
yading@11:                         int wanted_stream_nb,
yading@11:                         int related_stream,
yading@11:                         AVCodec **decoder_ret,
yading@11:                         int flags)
yading@11: {
yading@11:     int i, nb_streams = ic->nb_streams;
yading@11:     int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
yading@11:     unsigned *program = NULL;
yading@11:     AVCodec *decoder = NULL, *best_decoder = NULL;
yading@11: 
yading@11:     if (related_stream >= 0 && wanted_stream_nb < 0) {
yading@11:         AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
yading@11:         if (p) {
yading@11:             program = p->stream_index;
yading@11:             nb_streams = p->nb_stream_indexes;
yading@11:         }
yading@11:     }
yading@11:     for (i = 0; i < nb_streams; i++) {
yading@11:         int real_stream_index = program ? program[i] : i;
yading@11:         AVStream *st = ic->streams[real_stream_index];
yading@11:         AVCodecContext *avctx = st->codec;
yading@11:         if (avctx->codec_type != type)
yading@11:             continue;
yading@11:         if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
yading@11:             continue;
yading@11:         if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
yading@11:             continue;
yading@11:         if (decoder_ret) {
yading@11:             decoder = avcodec_find_decoder(st->codec->codec_id);
yading@11:             if (!decoder) {
yading@11:                 if (ret < 0)
yading@11:                     ret = AVERROR_DECODER_NOT_FOUND;
yading@11:                 continue;
yading@11:             }
yading@11:         }
yading@11:         count = st->codec_info_nb_frames;
yading@11:         bitrate = avctx->bit_rate;
yading@11:         multiframe = FFMIN(5, count);
yading@11:         if ((best_multiframe >  multiframe) ||
yading@11:             (best_multiframe == multiframe && best_bitrate >  bitrate) ||
yading@11:             (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
yading@11:             continue;
yading@11:         best_count = count;
yading@11:         best_bitrate = bitrate;
yading@11:         best_multiframe = multiframe;
yading@11:         ret = real_stream_index;
yading@11:         best_decoder = decoder;
yading@11:         if (program && i == nb_streams - 1 && ret < 0) {
yading@11:             program = NULL;
yading@11:             nb_streams = ic->nb_streams;
yading@11:             i = 0; /* no related stream found, try again with everything */
yading@11:         }
yading@11:     }
yading@11:     if (decoder_ret)
yading@11:         *decoder_ret = best_decoder;
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: /*******************************************************/
yading@11: 
yading@11: int av_read_play(AVFormatContext *s)
yading@11: {
yading@11:     if (s->iformat->read_play)
yading@11:         return s->iformat->read_play(s);
yading@11:     if (s->pb)
yading@11:         return avio_pause(s->pb, 0);
yading@11:     return AVERROR(ENOSYS);
yading@11: }
yading@11: 
yading@11: int av_read_pause(AVFormatContext *s)
yading@11: {
yading@11:     if (s->iformat->read_pause)
yading@11:         return s->iformat->read_pause(s);
yading@11:     if (s->pb)
yading@11:         return avio_pause(s->pb, 1);
yading@11:     return AVERROR(ENOSYS);
yading@11: }
yading@11: 
yading@11: void ff_free_stream(AVFormatContext *s, AVStream *st){
yading@11:     av_assert0(s->nb_streams>0);
yading@11:     av_assert0(s->streams[ s->nb_streams-1 ] == st);
yading@11: 
yading@11:     if (st->parser) {
yading@11:         av_parser_close(st->parser);
yading@11:     }
yading@11:     if (st->attached_pic.data)
yading@11:         av_free_packet(&st->attached_pic);
yading@11:     av_dict_free(&st->metadata);
yading@11:     av_freep(&st->probe_data.buf);
yading@11:     av_freep(&st->index_entries);
yading@11:     av_freep(&st->codec->extradata);
yading@11:     av_freep(&st->codec->subtitle_header);
yading@11:     av_freep(&st->codec);
yading@11:     av_freep(&st->priv_data);
yading@11:     if (st->info)
yading@11:         av_freep(&st->info->duration_error);
yading@11:     av_freep(&st->info);
yading@11:     av_freep(&s->streams[ --s->nb_streams ]);
yading@11: }
yading@11: 
yading@11: void avformat_free_context(AVFormatContext *s)
yading@11: {
yading@11:     int i;
yading@11: 
yading@11:     if (!s)
yading@11:         return;
yading@11: 
yading@11:     av_opt_free(s);
yading@11:     if (s->iformat && s->iformat->priv_class && s->priv_data)
yading@11:         av_opt_free(s->priv_data);
yading@11: 
yading@11:     for(i=s->nb_streams-1; i>=0; i--) {
yading@11:         ff_free_stream(s, s->streams[i]);
yading@11:     }
yading@11:     for(i=s->nb_programs-1; i>=0; i--) {
yading@11:         av_dict_free(&s->programs[i]->metadata);
yading@11:         av_freep(&s->programs[i]->stream_index);
yading@11:         av_freep(&s->programs[i]);
yading@11:     }
yading@11:     av_freep(&s->programs);
yading@11:     av_freep(&s->priv_data);
yading@11:     while(s->nb_chapters--) {
yading@11:         av_dict_free(&s->chapters[s->nb_chapters]->metadata);
yading@11:         av_freep(&s->chapters[s->nb_chapters]);
yading@11:     }
yading@11:     av_freep(&s->chapters);
yading@11:     av_dict_free(&s->metadata);
yading@11:     av_freep(&s->streams);
yading@11:     av_free(s);
yading@11: }
yading@11: 
yading@11: #if FF_API_CLOSE_INPUT_FILE
yading@11: void av_close_input_file(AVFormatContext *s)
yading@11: {
yading@11:     avformat_close_input(&s);
yading@11: }
yading@11: #endif
yading@11: 
yading@11: void avformat_close_input(AVFormatContext **ps)
yading@11: {
yading@11:     AVFormatContext *s = *ps;
yading@11:     AVIOContext *pb = s->pb;
yading@11: 
yading@11:     if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
yading@11:         (s->flags & AVFMT_FLAG_CUSTOM_IO))
yading@11:         pb = NULL;
yading@11: 
yading@11:     flush_packet_queue(s);
yading@11: 
yading@11:     if (s->iformat) {
yading@11:         if (s->iformat->read_close)
yading@11:             s->iformat->read_close(s);
yading@11:     }
yading@11: 
yading@11:     avformat_free_context(s);
yading@11: 
yading@11:     *ps = NULL;
yading@11: 
yading@11:     avio_close(pb);
yading@11: }
yading@11: 
yading@11: #if FF_API_NEW_STREAM
yading@11: AVStream *av_new_stream(AVFormatContext *s, int id)
yading@11: {
yading@11:     AVStream *st = avformat_new_stream(s, NULL);
yading@11:     if (st)
yading@11:         st->id = id;
yading@11:     return st;
yading@11: }
yading@11: #endif
yading@11: 
yading@11: AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
yading@11: {
yading@11:     AVStream *st;
yading@11:     int i;
yading@11:     AVStream **streams;
yading@11: 
yading@11:     if (s->nb_streams >= INT_MAX/sizeof(*streams))
yading@11:         return NULL;
yading@11:     streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
yading@11:     if (!streams)
yading@11:         return NULL;
yading@11:     s->streams = streams;
yading@11: 
yading@11:     st = av_mallocz(sizeof(AVStream));
yading@11:     if (!st)
yading@11:         return NULL;
yading@11:     if (!(st->info = av_mallocz(sizeof(*st->info)))) {
yading@11:         av_free(st);
yading@11:         return NULL;
yading@11:     }
yading@11:     st->info->last_dts = AV_NOPTS_VALUE;
yading@11: 
yading@11:     st->codec = avcodec_alloc_context3(c);
yading@11:     if (s->iformat) {
yading@11:         /* no default bitrate if decoding */
yading@11:         st->codec->bit_rate = 0;
yading@11:     }
yading@11:     st->index = s->nb_streams;
yading@11:     st->start_time = AV_NOPTS_VALUE;
yading@11:     st->duration = AV_NOPTS_VALUE;
yading@11:         /* we set the current DTS to 0 so that formats without any timestamps
yading@11:            but durations get some timestamps, formats with some unknown
yading@11:            timestamps have their first few packets buffered and the
yading@11:            timestamps corrected before they are returned to the user */
yading@11:     st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
yading@11:     st->first_dts = AV_NOPTS_VALUE;
yading@11:     st->probe_packets = MAX_PROBE_PACKETS;
yading@11:     st->pts_wrap_reference = AV_NOPTS_VALUE;
yading@11:     st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
yading@11: 
yading@11:     /* default pts setting is MPEG-like */
yading@11:     avpriv_set_pts_info(st, 33, 1, 90000);
yading@11:     st->last_IP_pts = AV_NOPTS_VALUE;
yading@11:     for(i=0; i<MAX_REORDER_DELAY+1; i++)
yading@11:         st->pts_buffer[i]= AV_NOPTS_VALUE;
yading@11:     st->reference_dts = AV_NOPTS_VALUE;
yading@11: 
yading@11:     st->sample_aspect_ratio = (AVRational){0,1};
yading@11: 
yading@11: #if FF_API_R_FRAME_RATE
yading@11:     st->info->last_dts      = AV_NOPTS_VALUE;
yading@11: #endif
yading@11:     st->info->fps_first_dts = AV_NOPTS_VALUE;
yading@11:     st->info->fps_last_dts  = AV_NOPTS_VALUE;
yading@11: 
yading@11:     s->streams[s->nb_streams++] = st;
yading@11:     return st;
yading@11: }
yading@11: 
yading@11: AVProgram *av_new_program(AVFormatContext *ac, int id)
yading@11: {
yading@11:     AVProgram *program=NULL;
yading@11:     int i;
yading@11: 
yading@11:     av_dlog(ac, "new_program: id=0x%04x\n", id);
yading@11: 
yading@11:     for(i=0; i<ac->nb_programs; i++)
yading@11:         if(ac->programs[i]->id == id)
yading@11:             program = ac->programs[i];
yading@11: 
yading@11:     if(!program){
yading@11:         program = av_mallocz(sizeof(AVProgram));
yading@11:         if (!program)
yading@11:             return NULL;
yading@11:         dynarray_add(&ac->programs, &ac->nb_programs, program);
yading@11:         program->discard = AVDISCARD_NONE;
yading@11:     }
yading@11:     program->id = id;
yading@11:     program->pts_wrap_reference = AV_NOPTS_VALUE;
yading@11:     program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
yading@11: 
yading@11:     program->start_time =
yading@11:     program->end_time   = AV_NOPTS_VALUE;
yading@11: 
yading@11:     return program;
yading@11: }
yading@11: 
yading@11: AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
yading@11: {
yading@11:     AVChapter *chapter = NULL;
yading@11:     int i;
yading@11: 
yading@11:     for(i=0; i<s->nb_chapters; i++)
yading@11:         if(s->chapters[i]->id == id)
yading@11:             chapter = s->chapters[i];
yading@11: 
yading@11:     if(!chapter){
yading@11:         chapter= av_mallocz(sizeof(AVChapter));
yading@11:         if(!chapter)
yading@11:             return NULL;
yading@11:         dynarray_add(&s->chapters, &s->nb_chapters, chapter);
yading@11:     }
yading@11:     av_dict_set(&chapter->metadata, "title", title, 0);
yading@11:     chapter->id    = id;
yading@11:     chapter->time_base= time_base;
yading@11:     chapter->start = start;
yading@11:     chapter->end   = end;
yading@11: 
yading@11:     return chapter;
yading@11: }
yading@11: 
yading@11: void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
yading@11: {
yading@11:     int i, j;
yading@11:     AVProgram *program=NULL;
yading@11:     void *tmp;
yading@11: 
yading@11:     if (idx >= ac->nb_streams) {
yading@11:         av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
yading@11:         return;
yading@11:     }
yading@11: 
yading@11:     for(i=0; i<ac->nb_programs; i++){
yading@11:         if(ac->programs[i]->id != progid)
yading@11:             continue;
yading@11:         program = ac->programs[i];
yading@11:         for(j=0; j<program->nb_stream_indexes; j++)
yading@11:             if(program->stream_index[j] == idx)
yading@11:                 return;
yading@11: 
yading@11:         tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
yading@11:         if(!tmp)
yading@11:             return;
yading@11:         program->stream_index = tmp;
yading@11:         program->stream_index[program->nb_stream_indexes++] = idx;
yading@11:         return;
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void print_fps(double d, const char *postfix){
yading@11:     uint64_t v= lrintf(d*100);
yading@11:     if     (v% 100      ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
yading@11:     else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
yading@11:     else                  av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
yading@11: }
yading@11: 
yading@11: static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
yading@11: {
yading@11:     if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
yading@11:         AVDictionaryEntry *tag=NULL;
yading@11: 
yading@11:         av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
yading@11:         while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
yading@11:             if(strcmp("language", tag->key)){
yading@11:                 const char *p = tag->value;
yading@11:                 av_log(ctx, AV_LOG_INFO, "%s  %-16s: ", indent, tag->key);
yading@11:                 while(*p) {
yading@11:                     char tmp[256];
yading@11:                     size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
yading@11:                     av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
yading@11:                     av_log(ctx, AV_LOG_INFO, "%s", tmp);
yading@11:                     p += len;
yading@11:                     if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
yading@11:                     if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s  %-16s: ", indent, "");
yading@11:                     if (*p) p++;
yading@11:                 }
yading@11:                 av_log(ctx, AV_LOG_INFO, "\n");
yading@11:             }
yading@11:         }
yading@11:     }
yading@11: }
yading@11: 
yading@11: /* "user interface" functions */
yading@11: static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
yading@11: {
yading@11:     char buf[256];
yading@11:     int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
yading@11:     AVStream *st = ic->streams[i];
yading@11:     int g = av_gcd(st->time_base.num, st->time_base.den);
yading@11:     AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
yading@11:     avcodec_string(buf, sizeof(buf), st->codec, is_output);
yading@11:     av_log(NULL, AV_LOG_INFO, "    Stream #%d:%d", index, i);
yading@11:     /* the pid is an important information, so we display it */
yading@11:     /* XXX: add a generic system */
yading@11:     if (flags & AVFMT_SHOW_IDS)
yading@11:         av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
yading@11:     if (lang)
yading@11:         av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
yading@11:     av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
yading@11:     av_log(NULL, AV_LOG_INFO, ": %s", buf);
yading@11:     if (st->sample_aspect_ratio.num && // default
yading@11:         av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
yading@11:         AVRational display_aspect_ratio;
yading@11:         av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
yading@11:                   st->codec->width*st->sample_aspect_ratio.num,
yading@11:                   st->codec->height*st->sample_aspect_ratio.den,
yading@11:                   1024*1024);
yading@11:         av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
yading@11:                  st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
yading@11:                  display_aspect_ratio.num, display_aspect_ratio.den);
yading@11:     }
yading@11:     if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
yading@11:         if(st->avg_frame_rate.den && st->avg_frame_rate.num)
yading@11:             print_fps(av_q2d(st->avg_frame_rate), "fps");
yading@11: #if FF_API_R_FRAME_RATE
yading@11:         if(st->r_frame_rate.den && st->r_frame_rate.num)
yading@11:             print_fps(av_q2d(st->r_frame_rate), "tbr");
yading@11: #endif
yading@11:         if(st->time_base.den && st->time_base.num)
yading@11:             print_fps(1/av_q2d(st->time_base), "tbn");
yading@11:         if(st->codec->time_base.den && st->codec->time_base.num)
yading@11:             print_fps(1/av_q2d(st->codec->time_base), "tbc");
yading@11:     }
yading@11:     if (st->disposition & AV_DISPOSITION_DEFAULT)
yading@11:         av_log(NULL, AV_LOG_INFO, " (default)");
yading@11:     if (st->disposition & AV_DISPOSITION_DUB)
yading@11:         av_log(NULL, AV_LOG_INFO, " (dub)");
yading@11:     if (st->disposition & AV_DISPOSITION_ORIGINAL)
yading@11:         av_log(NULL, AV_LOG_INFO, " (original)");
yading@11:     if (st->disposition & AV_DISPOSITION_COMMENT)
yading@11:         av_log(NULL, AV_LOG_INFO, " (comment)");
yading@11:     if (st->disposition & AV_DISPOSITION_LYRICS)
yading@11:         av_log(NULL, AV_LOG_INFO, " (lyrics)");
yading@11:     if (st->disposition & AV_DISPOSITION_KARAOKE)
yading@11:         av_log(NULL, AV_LOG_INFO, " (karaoke)");
yading@11:     if (st->disposition & AV_DISPOSITION_FORCED)
yading@11:         av_log(NULL, AV_LOG_INFO, " (forced)");
yading@11:     if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
yading@11:         av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
yading@11:     if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
yading@11:         av_log(NULL, AV_LOG_INFO, " (visual impaired)");
yading@11:     if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
yading@11:         av_log(NULL, AV_LOG_INFO, " (clean effects)");
yading@11:     av_log(NULL, AV_LOG_INFO, "\n");
yading@11:     dump_metadata(NULL, st->metadata, "    ");
yading@11: }
yading@11: 
yading@11: void av_dump_format(AVFormatContext *ic,
yading@11:                     int index,
yading@11:                     const char *url,
yading@11:                     int is_output)
yading@11: {
yading@11:     int i;
yading@11:     uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
yading@11:     if (ic->nb_streams && !printed)
yading@11:         return;
yading@11: 
yading@11:     av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
yading@11:             is_output ? "Output" : "Input",
yading@11:             index,
yading@11:             is_output ? ic->oformat->name : ic->iformat->name,
yading@11:             is_output ? "to" : "from", url);
yading@11:     dump_metadata(NULL, ic->metadata, "  ");
yading@11:     if (!is_output) {
yading@11:         av_log(NULL, AV_LOG_INFO, "  Duration: ");
yading@11:         if (ic->duration != AV_NOPTS_VALUE) {
yading@11:             int hours, mins, secs, us;
yading@11:             int64_t duration = ic->duration + 5000;
yading@11:             secs = duration / AV_TIME_BASE;
yading@11:             us = duration % AV_TIME_BASE;
yading@11:             mins = secs / 60;
yading@11:             secs %= 60;
yading@11:             hours = mins / 60;
yading@11:             mins %= 60;
yading@11:             av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
yading@11:                    (100 * us) / AV_TIME_BASE);
yading@11:         } else {
yading@11:             av_log(NULL, AV_LOG_INFO, "N/A");
yading@11:         }
yading@11:         if (ic->start_time != AV_NOPTS_VALUE) {
yading@11:             int secs, us;
yading@11:             av_log(NULL, AV_LOG_INFO, ", start: ");
yading@11:             secs = ic->start_time / AV_TIME_BASE;
yading@11:             us = abs(ic->start_time % AV_TIME_BASE);
yading@11:             av_log(NULL, AV_LOG_INFO, "%d.%06d",
yading@11:                    secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
yading@11:         }
yading@11:         av_log(NULL, AV_LOG_INFO, ", bitrate: ");
yading@11:         if (ic->bit_rate) {
yading@11:             av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
yading@11:         } else {
yading@11:             av_log(NULL, AV_LOG_INFO, "N/A");
yading@11:         }
yading@11:         av_log(NULL, AV_LOG_INFO, "\n");
yading@11:     }
yading@11:     for (i = 0; i < ic->nb_chapters; i++) {
yading@11:         AVChapter *ch = ic->chapters[i];
yading@11:         av_log(NULL, AV_LOG_INFO, "    Chapter #%d.%d: ", index, i);
yading@11:         av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
yading@11:         av_log(NULL, AV_LOG_INFO, "end %f\n",   ch->end   * av_q2d(ch->time_base));
yading@11: 
yading@11:         dump_metadata(NULL, ch->metadata, "    ");
yading@11:     }
yading@11:     if(ic->nb_programs) {
yading@11:         int j, k, total = 0;
yading@11:         for(j=0; j<ic->nb_programs; j++) {
yading@11:             AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
yading@11:                                                   "name", NULL, 0);
yading@11:             av_log(NULL, AV_LOG_INFO, "  Program %d %s\n", ic->programs[j]->id,
yading@11:                    name ? name->value : "");
yading@11:             dump_metadata(NULL, ic->programs[j]->metadata, "    ");
yading@11:             for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
yading@11:                 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
yading@11:                 printed[ic->programs[j]->stream_index[k]] = 1;
yading@11:             }
yading@11:             total += ic->programs[j]->nb_stream_indexes;
yading@11:         }
yading@11:         if (total < ic->nb_streams)
yading@11:             av_log(NULL, AV_LOG_INFO, "  No Program\n");
yading@11:     }
yading@11:     for(i=0;i<ic->nb_streams;i++)
yading@11:         if (!printed[i])
yading@11:             dump_stream_format(ic, i, index, is_output);
yading@11: 
yading@11:     av_free(printed);
yading@11: }
yading@11: 
yading@11: uint64_t ff_ntp_time(void)
yading@11: {
yading@11:   return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
yading@11: }
yading@11: 
yading@11: int av_get_frame_filename(char *buf, int buf_size,
yading@11:                           const char *path, int number)
yading@11: {
yading@11:     const char *p;
yading@11:     char *q, buf1[20], c;
yading@11:     int nd, len, percentd_found;
yading@11: 
yading@11:     q = buf;
yading@11:     p = path;
yading@11:     percentd_found = 0;
yading@11:     for(;;) {
yading@11:         c = *p++;
yading@11:         if (c == '\0')
yading@11:             break;
yading@11:         if (c == '%') {
yading@11:             do {
yading@11:                 nd = 0;
yading@11:                 while (av_isdigit(*p)) {
yading@11:                     nd = nd * 10 + *p++ - '0';
yading@11:                 }
yading@11:                 c = *p++;
yading@11:             } while (av_isdigit(c));
yading@11: 
yading@11:             switch(c) {
yading@11:             case '%':
yading@11:                 goto addchar;
yading@11:             case 'd':
yading@11:                 if (percentd_found)
yading@11:                     goto fail;
yading@11:                 percentd_found = 1;
yading@11:                 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
yading@11:                 len = strlen(buf1);
yading@11:                 if ((q - buf + len) > buf_size - 1)
yading@11:                     goto fail;
yading@11:                 memcpy(q, buf1, len);
yading@11:                 q += len;
yading@11:                 break;
yading@11:             default:
yading@11:                 goto fail;
yading@11:             }
yading@11:         } else {
yading@11:         addchar:
yading@11:             if ((q - buf) < buf_size - 1)
yading@11:                 *q++ = c;
yading@11:         }
yading@11:     }
yading@11:     if (!percentd_found)
yading@11:         goto fail;
yading@11:     *q = '\0';
yading@11:     return 0;
yading@11:  fail:
yading@11:     *q = '\0';
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: static void hex_dump_internal(void *avcl, FILE *f, int level,
yading@11:                               const uint8_t *buf, int size)
yading@11: {
yading@11:     int len, i, j, c;
yading@11: #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
yading@11: 
yading@11:     for(i=0;i<size;i+=16) {
yading@11:         len = size - i;
yading@11:         if (len > 16)
yading@11:             len = 16;
yading@11:         PRINT("%08x ", i);
yading@11:         for(j=0;j<16;j++) {
yading@11:             if (j < len)
yading@11:                 PRINT(" %02x", buf[i+j]);
yading@11:             else
yading@11:                 PRINT("   ");
yading@11:         }
yading@11:         PRINT(" ");
yading@11:         for(j=0;j<len;j++) {
yading@11:             c = buf[i+j];
yading@11:             if (c < ' ' || c > '~')
yading@11:                 c = '.';
yading@11:             PRINT("%c", c);
yading@11:         }
yading@11:         PRINT("\n");
yading@11:     }
yading@11: #undef PRINT
yading@11: }
yading@11: 
yading@11: void av_hex_dump(FILE *f, const uint8_t *buf, int size)
yading@11: {
yading@11:     hex_dump_internal(NULL, f, 0, buf, size);
yading@11: }
yading@11: 
yading@11: void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
yading@11: {
yading@11:     hex_dump_internal(avcl, NULL, level, buf, size);
yading@11: }
yading@11: 
yading@11: static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
yading@11: {
yading@11: #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
yading@11:     PRINT("stream #%d:\n", pkt->stream_index);
yading@11:     PRINT("  keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
yading@11:     PRINT("  duration=%0.3f\n", pkt->duration * av_q2d(time_base));
yading@11:     /* DTS is _always_ valid after av_read_frame() */
yading@11:     PRINT("  dts=");
yading@11:     if (pkt->dts == AV_NOPTS_VALUE)
yading@11:         PRINT("N/A");
yading@11:     else
yading@11:         PRINT("%0.3f", pkt->dts * av_q2d(time_base));
yading@11:     /* PTS may not be known if B-frames are present. */
yading@11:     PRINT("  pts=");
yading@11:     if (pkt->pts == AV_NOPTS_VALUE)
yading@11:         PRINT("N/A");
yading@11:     else
yading@11:         PRINT("%0.3f", pkt->pts * av_q2d(time_base));
yading@11:     PRINT("\n");
yading@11:     PRINT("  size=%d\n", pkt->size);
yading@11: #undef PRINT
yading@11:     if (dump_payload)
yading@11:         av_hex_dump(f, pkt->data, pkt->size);
yading@11: }
yading@11: 
yading@11: #if FF_API_PKT_DUMP
yading@11: void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
yading@11: {
yading@11:     AVRational tb = { 1, AV_TIME_BASE };
yading@11:     pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
yading@11: }
yading@11: #endif
yading@11: 
yading@11: void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
yading@11: {
yading@11:     pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
yading@11: }
yading@11: 
yading@11: #if FF_API_PKT_DUMP
yading@11: void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
yading@11: {
yading@11:     AVRational tb = { 1, AV_TIME_BASE };
yading@11:     pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
yading@11: }
yading@11: #endif
yading@11: 
yading@11: void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
yading@11:                       AVStream *st)
yading@11: {
yading@11:     pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
yading@11: }
yading@11: 
yading@11: void av_url_split(char *proto, int proto_size,
yading@11:                   char *authorization, int authorization_size,
yading@11:                   char *hostname, int hostname_size,
yading@11:                   int *port_ptr,
yading@11:                   char *path, int path_size,
yading@11:                   const char *url)
yading@11: {
yading@11:     const char *p, *ls, *ls2, *at, *at2, *col, *brk;
yading@11: 
yading@11:     if (port_ptr)               *port_ptr = -1;
yading@11:     if (proto_size > 0)         proto[0] = 0;
yading@11:     if (authorization_size > 0) authorization[0] = 0;
yading@11:     if (hostname_size > 0)      hostname[0] = 0;
yading@11:     if (path_size > 0)          path[0] = 0;
yading@11: 
yading@11:     /* parse protocol */
yading@11:     if ((p = strchr(url, ':'))) {
yading@11:         av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
yading@11:         p++; /* skip ':' */
yading@11:         if (*p == '/') p++;
yading@11:         if (*p == '/') p++;
yading@11:     } else {
yading@11:         /* no protocol means plain filename */
yading@11:         av_strlcpy(path, url, path_size);
yading@11:         return;
yading@11:     }
yading@11: 
yading@11:     /* separate path from hostname */
yading@11:     ls = strchr(p, '/');
yading@11:     ls2 = strchr(p, '?');
yading@11:     if(!ls)
yading@11:         ls = ls2;
yading@11:     else if (ls && ls2)
yading@11:         ls = FFMIN(ls, ls2);
yading@11:     if(ls)
yading@11:         av_strlcpy(path, ls, path_size);
yading@11:     else
yading@11:         ls = &p[strlen(p)]; // XXX
yading@11: 
yading@11:     /* the rest is hostname, use that to parse auth/port */
yading@11:     if (ls != p) {
yading@11:         /* authorization (user[:pass]@hostname) */
yading@11:         at2 = p;
yading@11:         while ((at = strchr(p, '@')) && at < ls) {
yading@11:             av_strlcpy(authorization, at2,
yading@11:                        FFMIN(authorization_size, at + 1 - at2));
yading@11:             p = at + 1; /* skip '@' */
yading@11:         }
yading@11: 
yading@11:         if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
yading@11:             /* [host]:port */
yading@11:             av_strlcpy(hostname, p + 1,
yading@11:                        FFMIN(hostname_size, brk - p));
yading@11:             if (brk[1] == ':' && port_ptr)
yading@11:                 *port_ptr = atoi(brk + 2);
yading@11:         } else if ((col = strchr(p, ':')) && col < ls) {
yading@11:             av_strlcpy(hostname, p,
yading@11:                        FFMIN(col + 1 - p, hostname_size));
yading@11:             if (port_ptr) *port_ptr = atoi(col + 1);
yading@11:         } else
yading@11:             av_strlcpy(hostname, p,
yading@11:                        FFMIN(ls + 1 - p, hostname_size));
yading@11:     }
yading@11: }
yading@11: 
yading@11: char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
yading@11: {
yading@11:     int i;
yading@11:     static const char hex_table_uc[16] = { '0', '1', '2', '3',
yading@11:                                            '4', '5', '6', '7',
yading@11:                                            '8', '9', 'A', 'B',
yading@11:                                            'C', 'D', 'E', 'F' };
yading@11:     static const char hex_table_lc[16] = { '0', '1', '2', '3',
yading@11:                                            '4', '5', '6', '7',
yading@11:                                            '8', '9', 'a', 'b',
yading@11:                                            'c', 'd', 'e', 'f' };
yading@11:     const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
yading@11: 
yading@11:     for(i = 0; i < s; i++) {
yading@11:         buff[i * 2]     = hex_table[src[i] >> 4];
yading@11:         buff[i * 2 + 1] = hex_table[src[i] & 0xF];
yading@11:     }
yading@11: 
yading@11:     return buff;
yading@11: }
yading@11: 
yading@11: int ff_hex_to_data(uint8_t *data, const char *p)
yading@11: {
yading@11:     int c, len, v;
yading@11: 
yading@11:     len = 0;
yading@11:     v = 1;
yading@11:     for (;;) {
yading@11:         p += strspn(p, SPACE_CHARS);
yading@11:         if (*p == '\0')
yading@11:             break;
yading@11:         c = av_toupper((unsigned char) *p++);
yading@11:         if (c >= '0' && c <= '9')
yading@11:             c = c - '0';
yading@11:         else if (c >= 'A' && c <= 'F')
yading@11:             c = c - 'A' + 10;
yading@11:         else
yading@11:             break;
yading@11:         v = (v << 4) | c;
yading@11:         if (v & 0x100) {
yading@11:             if (data)
yading@11:                 data[len] = v;
yading@11:             len++;
yading@11:             v = 1;
yading@11:         }
yading@11:     }
yading@11:     return len;
yading@11: }
yading@11: 
yading@11: #if FF_API_SET_PTS_INFO
yading@11: void av_set_pts_info(AVStream *s, int pts_wrap_bits,
yading@11:                      unsigned int pts_num, unsigned int pts_den)
yading@11: {
yading@11:     avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
yading@11: }
yading@11: #endif
yading@11: 
yading@11: void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
yading@11:                          unsigned int pts_num, unsigned int pts_den)
yading@11: {
yading@11:     AVRational new_tb;
yading@11:     if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
yading@11:         if(new_tb.num != pts_num)
yading@11:             av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
yading@11:     }else
yading@11:         av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
yading@11: 
yading@11:     if(new_tb.num <= 0 || new_tb.den <= 0) {
yading@11:         av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase %d/%d for st:%d\n", new_tb.num, new_tb.den, s->index);
yading@11:         return;
yading@11:     }
yading@11:     s->time_base = new_tb;
yading@11:     av_codec_set_pkt_timebase(s->codec, new_tb);
yading@11:     s->pts_wrap_bits = pts_wrap_bits;
yading@11: }
yading@11: 
yading@11: int ff_url_join(char *str, int size, const char *proto,
yading@11:                 const char *authorization, const char *hostname,
yading@11:                 int port, const char *fmt, ...)
yading@11: {
yading@11: #if CONFIG_NETWORK
yading@11:     struct addrinfo hints = { 0 }, *ai;
yading@11: #endif
yading@11: 
yading@11:     str[0] = '\0';
yading@11:     if (proto)
yading@11:         av_strlcatf(str, size, "%s://", proto);
yading@11:     if (authorization && authorization[0])
yading@11:         av_strlcatf(str, size, "%s@", authorization);
yading@11: #if CONFIG_NETWORK && defined(AF_INET6)
yading@11:     /* Determine if hostname is a numerical IPv6 address,
yading@11:      * properly escape it within [] in that case. */
yading@11:     hints.ai_flags = AI_NUMERICHOST;
yading@11:     if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
yading@11:         if (ai->ai_family == AF_INET6) {
yading@11:             av_strlcat(str, "[", size);
yading@11:             av_strlcat(str, hostname, size);
yading@11:             av_strlcat(str, "]", size);
yading@11:         } else {
yading@11:             av_strlcat(str, hostname, size);
yading@11:         }
yading@11:         freeaddrinfo(ai);
yading@11:     } else
yading@11: #endif
yading@11:         /* Not an IPv6 address, just output the plain string. */
yading@11:         av_strlcat(str, hostname, size);
yading@11: 
yading@11:     if (port >= 0)
yading@11:         av_strlcatf(str, size, ":%d", port);
yading@11:     if (fmt) {
yading@11:         va_list vl;
yading@11:         int len = strlen(str);
yading@11: 
yading@11:         va_start(vl, fmt);
yading@11:         vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
yading@11:         va_end(vl);
yading@11:     }
yading@11:     return strlen(str);
yading@11: }
yading@11: 
yading@11: int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
yading@11:                      AVFormatContext *src)
yading@11: {
yading@11:     AVPacket local_pkt;
yading@11: 
yading@11:     local_pkt = *pkt;
yading@11:     local_pkt.stream_index = dst_stream;
yading@11:     if (pkt->pts != AV_NOPTS_VALUE)
yading@11:         local_pkt.pts = av_rescale_q(pkt->pts,
yading@11:                                      src->streams[pkt->stream_index]->time_base,
yading@11:                                      dst->streams[dst_stream]->time_base);
yading@11:     if (pkt->dts != AV_NOPTS_VALUE)
yading@11:         local_pkt.dts = av_rescale_q(pkt->dts,
yading@11:                                      src->streams[pkt->stream_index]->time_base,
yading@11:                                      dst->streams[dst_stream]->time_base);
yading@11:     if (pkt->duration)
yading@11:         local_pkt.duration = av_rescale_q(pkt->duration,
yading@11:                                           src->streams[pkt->stream_index]->time_base,
yading@11:                                           dst->streams[dst_stream]->time_base);
yading@11:     return av_write_frame(dst, &local_pkt);
yading@11: }
yading@11: 
yading@11: void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
yading@11:                         void *context)
yading@11: {
yading@11:     const char *ptr = str;
yading@11: 
yading@11:     /* Parse key=value pairs. */
yading@11:     for (;;) {
yading@11:         const char *key;
yading@11:         char *dest = NULL, *dest_end;
yading@11:         int key_len, dest_len = 0;
yading@11: 
yading@11:         /* Skip whitespace and potential commas. */
yading@11:         while (*ptr && (av_isspace(*ptr) || *ptr == ','))
yading@11:             ptr++;
yading@11:         if (!*ptr)
yading@11:             break;
yading@11: 
yading@11:         key = ptr;
yading@11: 
yading@11:         if (!(ptr = strchr(key, '=')))
yading@11:             break;
yading@11:         ptr++;
yading@11:         key_len = ptr - key;
yading@11: 
yading@11:         callback_get_buf(context, key, key_len, &dest, &dest_len);
yading@11:         dest_end = dest + dest_len - 1;
yading@11: 
yading@11:         if (*ptr == '\"') {
yading@11:             ptr++;
yading@11:             while (*ptr && *ptr != '\"') {
yading@11:                 if (*ptr == '\\') {
yading@11:                     if (!ptr[1])
yading@11:                         break;
yading@11:                     if (dest && dest < dest_end)
yading@11:                         *dest++ = ptr[1];
yading@11:                     ptr += 2;
yading@11:                 } else {
yading@11:                     if (dest && dest < dest_end)
yading@11:                         *dest++ = *ptr;
yading@11:                     ptr++;
yading@11:                 }
yading@11:             }
yading@11:             if (*ptr == '\"')
yading@11:                 ptr++;
yading@11:         } else {
yading@11:             for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
yading@11:                 if (dest && dest < dest_end)
yading@11:                     *dest++ = *ptr;
yading@11:         }
yading@11:         if (dest)
yading@11:             *dest = 0;
yading@11:     }
yading@11: }
yading@11: 
yading@11: int ff_find_stream_index(AVFormatContext *s, int id)
yading@11: {
yading@11:     int i;
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         if (s->streams[i]->id == id)
yading@11:             return i;
yading@11:     }
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: void ff_make_absolute_url(char *buf, int size, const char *base,
yading@11:                           const char *rel)
yading@11: {
yading@11:     char *sep, *path_query;
yading@11:     /* Absolute path, relative to the current server */
yading@11:     if (base && strstr(base, "://") && rel[0] == '/') {
yading@11:         if (base != buf)
yading@11:             av_strlcpy(buf, base, size);
yading@11:         sep = strstr(buf, "://");
yading@11:         if (sep) {
yading@11:             /* Take scheme from base url */
yading@11:             if (rel[1] == '/') {
yading@11:                 sep[1] = '\0';
yading@11:             } else {
yading@11:                 /* Take scheme and host from base url */
yading@11:                 sep += 3;
yading@11:                 sep = strchr(sep, '/');
yading@11:                 if (sep)
yading@11:                     *sep = '\0';
yading@11:             }
yading@11:         }
yading@11:         av_strlcat(buf, rel, size);
yading@11:         return;
yading@11:     }
yading@11:     /* If rel actually is an absolute url, just copy it */
yading@11:     if (!base || strstr(rel, "://") || rel[0] == '/') {
yading@11:         av_strlcpy(buf, rel, size);
yading@11:         return;
yading@11:     }
yading@11:     if (base != buf)
yading@11:         av_strlcpy(buf, base, size);
yading@11: 
yading@11:     /* Strip off any query string from base */
yading@11:     path_query = strchr(buf, '?');
yading@11:     if (path_query != NULL)
yading@11:         *path_query = '\0';
yading@11: 
yading@11:     /* Is relative path just a new query part? */
yading@11:     if (rel[0] == '?') {
yading@11:         av_strlcat(buf, rel, size);
yading@11:         return;
yading@11:     }
yading@11: 
yading@11:     /* Remove the file name from the base url */
yading@11:     sep = strrchr(buf, '/');
yading@11:     if (sep)
yading@11:         sep[1] = '\0';
yading@11:     else
yading@11:         buf[0] = '\0';
yading@11:     while (av_strstart(rel, "../", NULL) && sep) {
yading@11:         /* Remove the path delimiter at the end */
yading@11:         sep[0] = '\0';
yading@11:         sep = strrchr(buf, '/');
yading@11:         /* If the next directory name to pop off is "..", break here */
yading@11:         if (!strcmp(sep ? &sep[1] : buf, "..")) {
yading@11:             /* Readd the slash we just removed */
yading@11:             av_strlcat(buf, "/", size);
yading@11:             break;
yading@11:         }
yading@11:         /* Cut off the directory name */
yading@11:         if (sep)
yading@11:             sep[1] = '\0';
yading@11:         else
yading@11:             buf[0] = '\0';
yading@11:         rel += 3;
yading@11:     }
yading@11:     av_strlcat(buf, rel, size);
yading@11: }
yading@11: 
yading@11: int64_t ff_iso8601_to_unix_time(const char *datestr)
yading@11: {
yading@11:     struct tm time1 = {0}, time2 = {0};
yading@11:     char *ret1, *ret2;
yading@11:     ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
yading@11:     ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
yading@11:     if (ret2 && !ret1)
yading@11:         return av_timegm(&time2);
yading@11:     else
yading@11:         return av_timegm(&time1);
yading@11: }
yading@11: 
yading@11: int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
yading@11: {
yading@11:     if (ofmt) {
yading@11:         if (ofmt->query_codec)
yading@11:             return ofmt->query_codec(codec_id, std_compliance);
yading@11:         else if (ofmt->codec_tag)
yading@11:             return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
yading@11:         else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
yading@11:                  codec_id == ofmt->subtitle_codec)
yading@11:             return 1;
yading@11:     }
yading@11:     return AVERROR_PATCHWELCOME;
yading@11: }
yading@11: 
yading@11: int avformat_network_init(void)
yading@11: {
yading@11: #if CONFIG_NETWORK
yading@11:     int ret;
yading@11:     ff_network_inited_globally = 1;
yading@11:     if ((ret = ff_network_init()) < 0)
yading@11:         return ret;
yading@11:     ff_tls_init();
yading@11: #endif
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int avformat_network_deinit(void)
yading@11: {
yading@11: #if CONFIG_NETWORK
yading@11:     ff_network_close();
yading@11:     ff_tls_deinit();
yading@11: #endif
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int ff_add_param_change(AVPacket *pkt, int32_t channels,
yading@11:                         uint64_t channel_layout, int32_t sample_rate,
yading@11:                         int32_t width, int32_t height)
yading@11: {
yading@11:     uint32_t flags = 0;
yading@11:     int size = 4;
yading@11:     uint8_t *data;
yading@11:     if (!pkt)
yading@11:         return AVERROR(EINVAL);
yading@11:     if (channels) {
yading@11:         size += 4;
yading@11:         flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
yading@11:     }
yading@11:     if (channel_layout) {
yading@11:         size += 8;
yading@11:         flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
yading@11:     }
yading@11:     if (sample_rate) {
yading@11:         size += 4;
yading@11:         flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
yading@11:     }
yading@11:     if (width || height) {
yading@11:         size += 8;
yading@11:         flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
yading@11:     }
yading@11:     data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
yading@11:     if (!data)
yading@11:         return AVERROR(ENOMEM);
yading@11:     bytestream_put_le32(&data, flags);
yading@11:     if (channels)
yading@11:         bytestream_put_le32(&data, channels);
yading@11:     if (channel_layout)
yading@11:         bytestream_put_le64(&data, channel_layout);
yading@11:     if (sample_rate)
yading@11:         bytestream_put_le32(&data, sample_rate);
yading@11:     if (width || height) {
yading@11:         bytestream_put_le32(&data, width);
yading@11:         bytestream_put_le32(&data, height);
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: const struct AVCodecTag *avformat_get_riff_video_tags(void)
yading@11: {
yading@11:     return ff_codec_bmp_tags;
yading@11: }
yading@11: const struct AVCodecTag *avformat_get_riff_audio_tags(void)
yading@11: {
yading@11:     return ff_codec_wav_tags;
yading@11: }
yading@11: 
yading@11: AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
yading@11: {
yading@11:     AVRational undef = {0, 1};
yading@11:     AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
yading@11:     AVRational codec_sample_aspect_ratio  = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
yading@11:     AVRational frame_sample_aspect_ratio  = frame  ? frame->sample_aspect_ratio  : codec_sample_aspect_ratio;
yading@11: 
yading@11:     av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
yading@11:                stream_sample_aspect_ratio.num,  stream_sample_aspect_ratio.den, INT_MAX);
yading@11:     if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
yading@11:         stream_sample_aspect_ratio = undef;
yading@11: 
yading@11:     av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
yading@11:                frame_sample_aspect_ratio.num,  frame_sample_aspect_ratio.den, INT_MAX);
yading@11:     if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
yading@11:         frame_sample_aspect_ratio = undef;
yading@11: 
yading@11:     if (stream_sample_aspect_ratio.num)
yading@11:         return stream_sample_aspect_ratio;
yading@11:     else
yading@11:         return frame_sample_aspect_ratio;
yading@11: }
yading@11: 
yading@11: AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
yading@11: {
yading@11:     AVRational fr = st->r_frame_rate;
yading@11: 
yading@11:     if (st->codec->ticks_per_frame > 1) {
yading@11:         AVRational codec_fr = av_inv_q(st->codec->time_base);
yading@11:         AVRational   avg_fr = st->avg_frame_rate;
yading@11:         codec_fr.den *= st->codec->ticks_per_frame;
yading@11:         if (   codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7
yading@11:             && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1)
yading@11:             fr = codec_fr;
yading@11:     }
yading@11: 
yading@11:     return fr;
yading@11: }
yading@11: 
yading@11: int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
yading@11:                                     const char *spec)
yading@11: {
yading@11:     if (*spec <= '9' && *spec >= '0') /* opt:index */
yading@11:         return strtol(spec, NULL, 0) == st->index;
yading@11:     else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
yading@11:              *spec == 't') { /* opt:[vasdt] */
yading@11:         enum AVMediaType type;
yading@11: 
yading@11:         switch (*spec++) {
yading@11:         case 'v': type = AVMEDIA_TYPE_VIDEO;      break;
yading@11:         case 'a': type = AVMEDIA_TYPE_AUDIO;      break;
yading@11:         case 's': type = AVMEDIA_TYPE_SUBTITLE;   break;
yading@11:         case 'd': type = AVMEDIA_TYPE_DATA;       break;
yading@11:         case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
yading@11:         default:  av_assert0(0);
yading@11:         }
yading@11:         if (type != st->codec->codec_type)
yading@11:             return 0;
yading@11:         if (*spec++ == ':') { /* possibly followed by :index */
yading@11:             int i, index = strtol(spec, NULL, 0);
yading@11:             for (i = 0; i < s->nb_streams; i++)
yading@11:                 if (s->streams[i]->codec->codec_type == type && index-- == 0)
yading@11:                    return i == st->index;
yading@11:             return 0;
yading@11:         }
yading@11:         return 1;
yading@11:     } else if (*spec == 'p' && *(spec + 1) == ':') {
yading@11:         int prog_id, i, j;
yading@11:         char *endptr;
yading@11:         spec += 2;
yading@11:         prog_id = strtol(spec, &endptr, 0);
yading@11:         for (i = 0; i < s->nb_programs; i++) {
yading@11:             if (s->programs[i]->id != prog_id)
yading@11:                 continue;
yading@11: 
yading@11:             if (*endptr++ == ':') {
yading@11:                 int stream_idx = strtol(endptr, NULL, 0);
yading@11:                 return stream_idx >= 0 &&
yading@11:                     stream_idx < s->programs[i]->nb_stream_indexes &&
yading@11:                     st->index == s->programs[i]->stream_index[stream_idx];
yading@11:             }
yading@11: 
yading@11:             for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
yading@11:                 if (st->index == s->programs[i]->stream_index[j])
yading@11:                     return 1;
yading@11:         }
yading@11:         return 0;
yading@11:     } else if (*spec == '#') {
yading@11:         int sid;
yading@11:         char *endptr;
yading@11:         sid = strtol(spec + 1, &endptr, 0);
yading@11:         if (!*endptr)
yading@11:             return st->id == sid;
yading@11:     } else if (!*spec) /* empty specifier, matches everything */
yading@11:         return 1;
yading@11: 
yading@11:     av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
yading@11:     return AVERROR(EINVAL);
yading@11: }
yading@11: 
yading@11: void ff_generate_avci_extradata(AVStream *st)
yading@11: {
yading@11:     static const uint8_t avci100_1080p_extradata[] = {
yading@11:         // SPS
yading@11:         0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
yading@11:         0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
yading@11:         0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
yading@11:         0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
yading@11:         0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
yading@11:         0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
yading@11:         0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
yading@11:         0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
yading@11:         0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
yading@11:         // PPS
yading@11:         0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
yading@11:         0xd0
yading@11:     };
yading@11:     static const uint8_t avci100_1080i_extradata[] = {
yading@11:         // SPS
yading@11:         0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
yading@11:         0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
yading@11:         0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
yading@11:         0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
yading@11:         0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
yading@11:         0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
yading@11:         0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
yading@11:         0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
yading@11:         0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
yading@11:         0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
yading@11:         0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00,
yading@11:         // PPS
yading@11:         0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
yading@11:         0xd0
yading@11:     };
yading@11:     static const uint8_t avci50_1080i_extradata[] = {
yading@11:         // SPS
yading@11:         0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
yading@11:         0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
yading@11:         0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
yading@11:         0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
yading@11:         0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
yading@11:         0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
yading@11:         0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
yading@11:         0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
yading@11:         0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01,
yading@11:         0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
yading@11:         0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
yading@11:         // PPS
yading@11:         0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
yading@11:         0x11
yading@11:     };
yading@11:     static const uint8_t avci100_720p_extradata[] = {
yading@11:         // SPS
yading@11:         0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
yading@11:         0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
yading@11:         0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
yading@11:         0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
yading@11:         0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
yading@11:         0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
yading@11:         0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
yading@11:         0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
yading@11:         0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
yading@11:         0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
yading@11:         // PPS
yading@11:         0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
yading@11:         0x11
yading@11:     };
yading@11:     int size = 0;
yading@11:     const uint8_t *data = 0;
yading@11:     if (st->codec->width == 1920) {
yading@11:         if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
yading@11:             data = avci100_1080p_extradata;
yading@11:             size = sizeof(avci100_1080p_extradata);
yading@11:         } else {
yading@11:             data = avci100_1080i_extradata;
yading@11:             size = sizeof(avci100_1080i_extradata);
yading@11:         }
yading@11:     } else if (st->codec->width == 1440) {
yading@11:         data = avci50_1080i_extradata;
yading@11:         size = sizeof(avci50_1080i_extradata);
yading@11:     } else if (st->codec->width == 1280) {
yading@11:         data = avci100_720p_extradata;
yading@11:         size = sizeof(avci100_720p_extradata);
yading@11:     }
yading@11:     if (!size)
yading@11:         return;
yading@11:     av_freep(&st->codec->extradata);
yading@11:     st->codec->extradata_size = 0;
yading@11:     st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
yading@11:     if (!st->codec->extradata)
yading@11:         return;
yading@11:     memcpy(st->codec->extradata, data, size);
yading@11:     st->codec->extradata_size = size;
yading@11: }
yading@11: 
yading@11: static int match_host_pattern(const char *pattern, const char *hostname)
yading@11: {
yading@11:     int len_p, len_h;
yading@11:     if (!strcmp(pattern, "*"))
yading@11:         return 1;
yading@11:     // Skip a possible *. at the start of the pattern
yading@11:     if (pattern[0] == '*')
yading@11:         pattern++;
yading@11:     if (pattern[0] == '.')
yading@11:         pattern++;
yading@11:     len_p = strlen(pattern);
yading@11:     len_h = strlen(hostname);
yading@11:     if (len_p > len_h)
yading@11:         return 0;
yading@11:     // Simply check if the end of hostname is equal to 'pattern'
yading@11:     if (!strcmp(pattern, &hostname[len_h - len_p])) {
yading@11:         if (len_h == len_p)
yading@11:             return 1; // Exact match
yading@11:         if (hostname[len_h - len_p - 1] == '.')
yading@11:             return 1; // The matched substring is a domain and not just a substring of a domain
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int ff_http_match_no_proxy(const char *no_proxy, const char *hostname)
yading@11: {
yading@11:     char *buf, *start;
yading@11:     int ret = 0;
yading@11:     if (!no_proxy)
yading@11:         return 0;
yading@11:     if (!hostname)
yading@11:         return 0;
yading@11:     buf = av_strdup(no_proxy);
yading@11:     if (!buf)
yading@11:         return 0;
yading@11:     start = buf;
yading@11:     while (start) {
yading@11:         char *sep, *next = NULL;
yading@11:         start += strspn(start, " ,");
yading@11:         sep = start + strcspn(start, " ,");
yading@11:         if (*sep) {
yading@11:             next = sep + 1;
yading@11:             *sep = '\0';
yading@11:         }
yading@11:         if (match_host_pattern(start, hostname)) {
yading@11:             ret = 1;
yading@11:             break;
yading@11:         }
yading@11:         start = next;
yading@11:     }
yading@11:     av_free(buf);
yading@11:     return ret;
yading@11: }