yading@11: /*
yading@11:  * muxing 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/bytestream.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "libavutil/dict.h"
yading@11: #include "libavutil/pixdesc.h"
yading@11: #include "libavutil/timestamp.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 "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:  * muxing functions for use within libavformat
yading@11:  */
yading@11: 
yading@11: /* fraction handling */
yading@11: 
yading@11: /**
yading@11:  * f = val + (num / den) + 0.5.
yading@11:  *
yading@11:  * 'num' is normalized so that it is such as 0 <= num < den.
yading@11:  *
yading@11:  * @param f fractional number
yading@11:  * @param val integer value
yading@11:  * @param num must be >= 0
yading@11:  * @param den must be >= 1
yading@11:  */
yading@11: static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
yading@11: {
yading@11:     num += (den >> 1);
yading@11:     if (num >= den) {
yading@11:         val += num / den;
yading@11:         num  = num % den;
yading@11:     }
yading@11:     f->val = val;
yading@11:     f->num = num;
yading@11:     f->den = den;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Fractional addition to f: f = f + (incr / f->den).
yading@11:  *
yading@11:  * @param f fractional number
yading@11:  * @param incr increment, can be positive or negative
yading@11:  */
yading@11: static void frac_add(AVFrac *f, int64_t incr)
yading@11: {
yading@11:     int64_t num, den;
yading@11: 
yading@11:     num = f->num + incr;
yading@11:     den = f->den;
yading@11:     if (num < 0) {
yading@11:         f->val += num / den;
yading@11:         num     = num % den;
yading@11:         if (num < 0) {
yading@11:             num += den;
yading@11:             f->val--;
yading@11:         }
yading@11:     } else if (num >= den) {
yading@11:         f->val += num / den;
yading@11:         num     = num % den;
yading@11:     }
yading@11:     f->num = num;
yading@11: }
yading@11: 
yading@11: AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precission)
yading@11: {
yading@11:     AVRational q;
yading@11:     int j;
yading@11: 
yading@11:     if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
yading@11:         q = (AVRational){1, st->codec->sample_rate};
yading@11:     } else {
yading@11:         q = st->codec->time_base;
yading@11:     }
yading@11:     for (j=2; j<14; j+= 1+(j>2))
yading@11:         while (q.den / q.num < min_precission && q.num % j == 0)
yading@11:             q.num /= j;
yading@11:     while (q.den / q.num < min_precission && q.den < (1<<24))
yading@11:         q.den <<= 1;
yading@11: 
yading@11:     return q;
yading@11: }
yading@11: 
yading@11: int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
yading@11:                                    const char *format, const char *filename)
yading@11: {
yading@11:     AVFormatContext *s = avformat_alloc_context();
yading@11:     int ret = 0;
yading@11: 
yading@11:     *avctx = NULL;
yading@11:     if (!s)
yading@11:         goto nomem;
yading@11: 
yading@11:     if (!oformat) {
yading@11:         if (format) {
yading@11:             oformat = av_guess_format(format, NULL, NULL);
yading@11:             if (!oformat) {
yading@11:                 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
yading@11:                 ret = AVERROR(EINVAL);
yading@11:                 goto error;
yading@11:             }
yading@11:         } else {
yading@11:             oformat = av_guess_format(NULL, filename, NULL);
yading@11:             if (!oformat) {
yading@11:                 ret = AVERROR(EINVAL);
yading@11:                 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
yading@11:                        filename);
yading@11:                 goto error;
yading@11:             }
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     s->oformat = oformat;
yading@11:     if (s->oformat->priv_data_size > 0) {
yading@11:         s->priv_data = av_mallocz(s->oformat->priv_data_size);
yading@11:         if (!s->priv_data)
yading@11:             goto nomem;
yading@11:         if (s->oformat->priv_class) {
yading@11:             *(const AVClass**)s->priv_data= s->oformat->priv_class;
yading@11:             av_opt_set_defaults(s->priv_data);
yading@11:         }
yading@11:     } else
yading@11:         s->priv_data = NULL;
yading@11: 
yading@11:     if (filename)
yading@11:         av_strlcpy(s->filename, filename, sizeof(s->filename));
yading@11:     *avctx = s;
yading@11:     return 0;
yading@11: nomem:
yading@11:     av_log(s, AV_LOG_ERROR, "Out of memory\n");
yading@11:     ret = AVERROR(ENOMEM);
yading@11: error:
yading@11:     avformat_free_context(s);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: #if FF_API_ALLOC_OUTPUT_CONTEXT
yading@11: AVFormatContext *avformat_alloc_output_context(const char *format,
yading@11:                                                AVOutputFormat *oformat, const char *filename)
yading@11: {
yading@11:     AVFormatContext *avctx;
yading@11:     int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
yading@11:     return ret < 0 ? NULL : avctx;
yading@11: }
yading@11: #endif
yading@11: 
yading@11: static int validate_codec_tag(AVFormatContext *s, AVStream *st)
yading@11: {
yading@11:     const AVCodecTag *avctag;
yading@11:     int n;
yading@11:     enum AVCodecID id = AV_CODEC_ID_NONE;
yading@11:     unsigned int tag  = 0;
yading@11: 
yading@11:     /**
yading@11:      * Check that tag + id is in the table
yading@11:      * If neither is in the table -> OK
yading@11:      * If tag is in the table with another id -> FAIL
yading@11:      * If id is in the table with another tag -> FAIL unless strict < normal
yading@11:      */
yading@11:     for (n = 0; s->oformat->codec_tag[n]; n++) {
yading@11:         avctag = s->oformat->codec_tag[n];
yading@11:         while (avctag->id != AV_CODEC_ID_NONE) {
yading@11:             if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
yading@11:                 id = avctag->id;
yading@11:                 if (id == st->codec->codec_id)
yading@11:                     return 1;
yading@11:             }
yading@11:             if (avctag->id == st->codec->codec_id)
yading@11:                 tag = avctag->tag;
yading@11:             avctag++;
yading@11:         }
yading@11:     }
yading@11:     if (id != AV_CODEC_ID_NONE)
yading@11:         return 0;
yading@11:     if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
yading@11:         return 0;
yading@11:     return 1;
yading@11: }
yading@11: 
yading@11: 
yading@11: static int init_muxer(AVFormatContext *s, AVDictionary **options)
yading@11: {
yading@11:     int ret = 0, i;
yading@11:     AVStream *st;
yading@11:     AVDictionary *tmp = NULL;
yading@11:     AVCodecContext *codec = NULL;
yading@11:     AVOutputFormat *of = s->oformat;
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:     if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
yading@11:         (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
yading@11:         goto fail;
yading@11: 
yading@11:     // some sanity checks
yading@11:     if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
yading@11:         av_log(s, AV_LOG_ERROR, "no streams\n");
yading@11:         ret = AVERROR(EINVAL);
yading@11:         goto fail;
yading@11:     }
yading@11: 
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         st    = s->streams[i];
yading@11:         codec = st->codec;
yading@11: 
yading@11:         switch (codec->codec_type) {
yading@11:         case AVMEDIA_TYPE_AUDIO:
yading@11:             if (codec->sample_rate <= 0) {
yading@11:                 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
yading@11:                 ret = AVERROR(EINVAL);
yading@11:                 goto fail;
yading@11:             }
yading@11:             if (!codec->block_align)
yading@11:                 codec->block_align = codec->channels *
yading@11:                                      av_get_bits_per_sample(codec->codec_id) >> 3;
yading@11:             break;
yading@11:         case AVMEDIA_TYPE_VIDEO:
yading@11:             if (codec->time_base.num <= 0 ||
yading@11:                 codec->time_base.den <= 0) { //FIXME audio too?
yading@11:                 av_log(s, AV_LOG_ERROR, "time base not set\n");
yading@11:                 ret = AVERROR(EINVAL);
yading@11:                 goto fail;
yading@11:             }
yading@11: 
yading@11:             if ((codec->width <= 0 || codec->height <= 0) &&
yading@11:                 !(of->flags & AVFMT_NODIMENSIONS)) {
yading@11:                 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
yading@11:                 ret = AVERROR(EINVAL);
yading@11:                 goto fail;
yading@11:             }
yading@11:             if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio)
yading@11:                 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
yading@11:             ) {
yading@11:                 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
yading@11:                                         "(%d/%d) and encoder layer (%d/%d)\n",
yading@11:                        st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
yading@11:                        codec->sample_aspect_ratio.num,
yading@11:                        codec->sample_aspect_ratio.den);
yading@11:                 ret = AVERROR(EINVAL);
yading@11:                 goto fail;
yading@11:             }
yading@11:             break;
yading@11:         }
yading@11: 
yading@11:         if (of->codec_tag) {
yading@11:             if (   codec->codec_tag
yading@11:                 && codec->codec_id == AV_CODEC_ID_RAWVIDEO
yading@11:                 && (   av_codec_get_tag(of->codec_tag, codec->codec_id) == 0
yading@11:                     || av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' '))
yading@11:                 && !validate_codec_tag(s, st)) {
yading@11:                 // the current rawvideo encoding system ends up setting
yading@11:                 // the wrong codec_tag for avi/mov, we override it here
yading@11:                 codec->codec_tag = 0;
yading@11:             }
yading@11:             if (codec->codec_tag) {
yading@11:                 if (!validate_codec_tag(s, st)) {
yading@11:                     char tagbuf[32], cortag[32];
yading@11:                     av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
yading@11:                     av_get_codec_tag_string(cortag, sizeof(cortag), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id));
yading@11:                     av_log(s, AV_LOG_ERROR,
yading@11:                            "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
yading@11:                            tagbuf, codec->codec_tag, codec->codec_id, cortag);
yading@11:                     ret = AVERROR_INVALIDDATA;
yading@11:                     goto fail;
yading@11:                 }
yading@11:             } else
yading@11:                 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
yading@11:         }
yading@11: 
yading@11:         if (of->flags & AVFMT_GLOBALHEADER &&
yading@11:             !(codec->flags & CODEC_FLAG_GLOBAL_HEADER))
yading@11:             av_log(s, AV_LOG_WARNING,
yading@11:                    "Codec for stream %d does not use global headers "
yading@11:                    "but container format requires global headers\n", i);
yading@11:     }
yading@11: 
yading@11:     if (!s->priv_data && of->priv_data_size > 0) {
yading@11:         s->priv_data = av_mallocz(of->priv_data_size);
yading@11:         if (!s->priv_data) {
yading@11:             ret = AVERROR(ENOMEM);
yading@11:             goto fail;
yading@11:         }
yading@11:         if (of->priv_class) {
yading@11:             *(const AVClass **)s->priv_data = of->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:     /* set muxer identification string */
yading@11:     if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
yading@11:         av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
yading@11:     }
yading@11: 
yading@11:     if (options) {
yading@11:          av_dict_free(options);
yading@11:          *options = tmp;
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: 
yading@11: fail:
yading@11:     av_dict_free(&tmp);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int init_pts(AVFormatContext *s)
yading@11: {
yading@11:     int i;
yading@11:     AVStream *st;
yading@11: 
yading@11:     /* init PTS generation */
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         int64_t den = AV_NOPTS_VALUE;
yading@11:         st = s->streams[i];
yading@11: 
yading@11:         switch (st->codec->codec_type) {
yading@11:         case AVMEDIA_TYPE_AUDIO:
yading@11:             den = (int64_t)st->time_base.num * st->codec->sample_rate;
yading@11:             break;
yading@11:         case AVMEDIA_TYPE_VIDEO:
yading@11:             den = (int64_t)st->time_base.num * st->codec->time_base.den;
yading@11:             break;
yading@11:         default:
yading@11:             break;
yading@11:         }
yading@11:         if (den != AV_NOPTS_VALUE) {
yading@11:             if (den <= 0)
yading@11:                 return AVERROR_INVALIDDATA;
yading@11: 
yading@11:             frac_init(&st->pts, 0, 0, den);
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int avformat_write_header(AVFormatContext *s, AVDictionary **options)
yading@11: {
yading@11:     int ret = 0;
yading@11: 
yading@11:     if (ret = init_muxer(s, options))
yading@11:         return ret;
yading@11: 
yading@11:     if (s->oformat->write_header) {
yading@11:         ret = s->oformat->write_header(s);
yading@11:         if (ret >= 0 && s->pb && s->pb->error < 0)
yading@11:             ret = s->pb->error;
yading@11:         if (ret < 0)
yading@11:             return ret;
yading@11:     }
yading@11: 
yading@11:     if ((ret = init_pts(s)) < 0)
yading@11:         return ret;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: //FIXME merge with compute_pkt_fields
yading@11: static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
yading@11: {
yading@11:     int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0);
yading@11:     int num, den, frame_size, i;
yading@11: 
yading@11:     av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
yading@11:             av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
yading@11: 
yading@11:     /* duration field */
yading@11:     if (pkt->duration == 0) {
yading@11:         ff_compute_frame_duration(&num, &den, st, NULL, pkt);
yading@11:         if (den && num) {
yading@11:             pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
yading@11:         pkt->pts = pkt->dts;
yading@11: 
yading@11:     //XXX/FIXME this is a temporary hack until all encoders output pts
yading@11:     if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
yading@11:         static int warned;
yading@11:         if (!warned) {
yading@11:             av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
yading@11:             warned = 1;
yading@11:         }
yading@11:         pkt->dts =
yading@11: //        pkt->pts= st->cur_dts;
yading@11:             pkt->pts = st->pts.val;
yading@11:     }
yading@11: 
yading@11:     //calculate dts from pts
yading@11:     if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
yading@11:         st->pts_buffer[0] = pkt->pts;
yading@11:         for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
yading@11:             st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
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: 
yading@11:         pkt->dts = st->pts_buffer[0];
yading@11:     }
yading@11: 
yading@11:     if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
yading@11:         ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
yading@11:           st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
yading@11:         av_log(s, AV_LOG_ERROR,
yading@11:                "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
yading@11:                st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11:     if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
yading@11:         av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n",
yading@11:                av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index);
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     av_dlog(s, "av_write_frame: pts2:%s dts2:%s\n",
yading@11:             av_ts2str(pkt->pts), av_ts2str(pkt->dts));
yading@11:     st->cur_dts = pkt->dts;
yading@11:     st->pts.val = pkt->dts;
yading@11: 
yading@11:     /* update pts */
yading@11:     switch (st->codec->codec_type) {
yading@11:     case AVMEDIA_TYPE_AUDIO:
yading@11:         frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 1);
yading@11: 
yading@11:         /* HACK/FIXME, we skip the initial 0 size packets as they are most
yading@11:          * likely equal to the encoder delay, but it would be better if we
yading@11:          * had the real timestamps from the encoder */
yading@11:         if (frame_size >= 0 && (pkt->size || st->pts.num != st->pts.den >> 1 || st->pts.val)) {
yading@11:             frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
yading@11:         }
yading@11:         break;
yading@11:     case AVMEDIA_TYPE_VIDEO:
yading@11:         frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
yading@11:         break;
yading@11:     default:
yading@11:         break;
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Move side data from payload to internal struct, call muxer, and restore
yading@11:  * original packet.
yading@11:  */
yading@11: static inline int split_write_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     int ret, did_split;
yading@11: 
yading@11:     did_split = av_packet_split_side_data(pkt);
yading@11:     ret = s->oformat->write_packet(s, pkt);
yading@11:     if (s->flush_packets && s->pb && s->pb->error >= 0)
yading@11:         avio_flush(s->pb);
yading@11:     if (did_split)
yading@11:         av_packet_merge_side_data(pkt);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: int av_write_frame(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     int ret;
yading@11: 
yading@11:     if (!pkt) {
yading@11:         if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
yading@11:             ret = s->oformat->write_packet(s, NULL);
yading@11:             if (s->flush_packets && s->pb && s->pb->error >= 0)
yading@11:                 avio_flush(s->pb);
yading@11:             if (ret >= 0 && s->pb && s->pb->error < 0)
yading@11:                 ret = s->pb->error;
yading@11:             return ret;
yading@11:         }
yading@11:         return 1;
yading@11:     }
yading@11: 
yading@11:     ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
yading@11: 
yading@11:     if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
yading@11:         return ret;
yading@11: 
yading@11:     ret = split_write_packet(s, pkt);
yading@11:     if (ret >= 0 && s->pb && s->pb->error < 0)
yading@11:         ret = s->pb->error;
yading@11: 
yading@11:     if (ret >= 0)
yading@11:         s->streams[pkt->stream_index]->nb_frames++;
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: #define CHUNK_START 0x1000
yading@11: 
yading@11: int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
yading@11:                               int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
yading@11: {
yading@11:     AVPacketList **next_point, *this_pktl;
yading@11:     AVStream *st   = s->streams[pkt->stream_index];
yading@11:     int chunked    = s->max_chunk_size || s->max_chunk_duration;
yading@11: 
yading@11:     this_pktl      = av_mallocz(sizeof(AVPacketList));
yading@11:     if (!this_pktl)
yading@11:         return AVERROR(ENOMEM);
yading@11:     this_pktl->pkt = *pkt;
yading@11: #if FF_API_DESTRUCT_PACKET
yading@11:     pkt->destruct  = NULL;           // do not free original but only the copy
yading@11: #endif
yading@11:     pkt->buf       = NULL;
yading@11:     av_dup_packet(&this_pktl->pkt);  // duplicate the packet if it uses non-allocated memory
yading@11: 
yading@11:     if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
yading@11:         next_point = &(st->last_in_packet_buffer->next);
yading@11:     } else {
yading@11:         next_point = &s->packet_buffer;
yading@11:     }
yading@11: 
yading@11:     if (chunked) {
yading@11:         uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
yading@11:         st->interleaver_chunk_size     += pkt->size;
yading@11:         st->interleaver_chunk_duration += pkt->duration;
yading@11:         if (   (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
yading@11:             || (max && st->interleaver_chunk_duration           > max)) {
yading@11:             st->interleaver_chunk_size      = 0;
yading@11:             this_pktl->pkt.flags |= CHUNK_START;
yading@11:             if (max && st->interleaver_chunk_duration > max) {
yading@11:                 int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
yading@11:                 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
yading@11: 
yading@11:                 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
yading@11:             } else
yading@11:                 st->interleaver_chunk_duration = 0;
yading@11:         }
yading@11:     }
yading@11:     if (*next_point) {
yading@11:         if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
yading@11:             goto next_non_null;
yading@11: 
yading@11:         if (compare(s, &s->packet_buffer_end->pkt, pkt)) {
yading@11:             while (   *next_point
yading@11:                    && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
yading@11:                        || !compare(s, &(*next_point)->pkt, pkt)))
yading@11:                 next_point = &(*next_point)->next;
yading@11:             if (*next_point)
yading@11:                 goto next_non_null;
yading@11:         } else {
yading@11:             next_point = &(s->packet_buffer_end->next);
yading@11:         }
yading@11:     }
yading@11:     av_assert1(!*next_point);
yading@11: 
yading@11:     s->packet_buffer_end = this_pktl;
yading@11: next_non_null:
yading@11: 
yading@11:     this_pktl->next = *next_point;
yading@11: 
yading@11:     s->streams[pkt->stream_index]->last_in_packet_buffer =
yading@11:         *next_point                                      = this_pktl;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
yading@11: {
yading@11:     AVStream *st  = s->streams[pkt->stream_index];
yading@11:     AVStream *st2 = s->streams[next->stream_index];
yading@11:     int comp      = av_compare_ts(next->dts, st2->time_base, pkt->dts,
yading@11:                                   st->time_base);
yading@11:     if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) {
yading@11:         int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO);
yading@11:         int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO);
yading@11:         if (ts == ts2) {
yading@11:             ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
yading@11:                -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
yading@11:             ts2=0;
yading@11:         }
yading@11:         comp= (ts>ts2) - (ts<ts2);
yading@11:     }
yading@11: 
yading@11:     if (comp == 0)
yading@11:         return pkt->stream_index < next->stream_index;
yading@11:     return comp > 0;
yading@11: }
yading@11: 
yading@11: int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
yading@11:                                  AVPacket *pkt, int flush)
yading@11: {
yading@11:     AVPacketList *pktl;
yading@11:     int stream_count = 0, noninterleaved_count = 0;
yading@11:     int64_t delta_dts_max = 0;
yading@11:     int i, ret;
yading@11: 
yading@11:     if (pkt) {
yading@11:         ret = ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
yading@11:         if (ret < 0)
yading@11:             return ret;
yading@11:     }
yading@11: 
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         if (s->streams[i]->last_in_packet_buffer) {
yading@11:             ++stream_count;
yading@11:         } else if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
yading@11:             ++noninterleaved_count;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (s->nb_streams == stream_count) {
yading@11:         flush = 1;
yading@11:     } else if (!flush) {
yading@11:         for (i=0; i < s->nb_streams; i++) {
yading@11:             if (s->streams[i]->last_in_packet_buffer) {
yading@11:                 int64_t delta_dts =
yading@11:                     av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
yading@11:                                 s->streams[i]->time_base,
yading@11:                                 AV_TIME_BASE_Q) -
yading@11:                     av_rescale_q(s->packet_buffer->pkt.dts,
yading@11:                                 s->streams[s->packet_buffer->pkt.stream_index]->time_base,
yading@11:                                 AV_TIME_BASE_Q);
yading@11:                 delta_dts_max= FFMAX(delta_dts_max, delta_dts);
yading@11:             }
yading@11:         }
yading@11:         if (s->nb_streams == stream_count+noninterleaved_count &&
yading@11:            delta_dts_max > 20*AV_TIME_BASE) {
yading@11:             av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
yading@11:             flush = 1;
yading@11:         }
yading@11:     }
yading@11:     if (stream_count && flush) {
yading@11:         AVStream *st;
yading@11:         pktl = s->packet_buffer;
yading@11:         *out = pktl->pkt;
yading@11:         st   = s->streams[out->stream_index];
yading@11: 
yading@11:         s->packet_buffer = pktl->next;
yading@11:         if (!s->packet_buffer)
yading@11:             s->packet_buffer_end = NULL;
yading@11: 
yading@11:         if (st->last_in_packet_buffer == pktl)
yading@11:             st->last_in_packet_buffer = NULL;
yading@11:         av_freep(&pktl);
yading@11: 
yading@11:         if (s->avoid_negative_ts > 0) {
yading@11:             if (out->dts != AV_NOPTS_VALUE) {
yading@11:                 if (!st->mux_ts_offset && out->dts < 0) {
yading@11:                     for (i = 0; i < s->nb_streams; i++) {
yading@11:                         s->streams[i]->mux_ts_offset =
yading@11:                             av_rescale_q_rnd(-out->dts,
yading@11:                                              st->time_base,
yading@11:                                              s->streams[i]->time_base,
yading@11:                                              AV_ROUND_UP);
yading@11:                     }
yading@11:                 }
yading@11:                 out->dts += st->mux_ts_offset;
yading@11:             }
yading@11:             if (out->pts != AV_NOPTS_VALUE)
yading@11:                 out->pts += st->mux_ts_offset;
yading@11:         }
yading@11: 
yading@11:         return 1;
yading@11:     } else {
yading@11:         av_init_packet(out);
yading@11:         return 0;
yading@11:     }
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Interleave an AVPacket correctly so it can be muxed.
yading@11:  * @param out the interleaved packet will be output here
yading@11:  * @param in the input packet
yading@11:  * @param flush 1 if no further packets are available as input and all
yading@11:  *              remaining packets should be output
yading@11:  * @return 1 if a packet was output, 0 if no packet could be output,
yading@11:  *         < 0 if an error occurred
yading@11:  */
yading@11: static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
yading@11: {
yading@11:     if (s->oformat->interleave_packet) {
yading@11:         int ret = s->oformat->interleave_packet(s, out, in, flush);
yading@11:         if (in)
yading@11:             av_free_packet(in);
yading@11:         return ret;
yading@11:     } else
yading@11:         return ff_interleave_packet_per_dts(s, out, in, flush);
yading@11: }
yading@11: 
yading@11: int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     int ret, flush = 0;
yading@11: 
yading@11:     if (pkt) {
yading@11:         AVStream *st = s->streams[pkt->stream_index];
yading@11: 
yading@11:         //FIXME/XXX/HACK drop zero sized packets
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size == 0)
yading@11:             return 0;
yading@11: 
yading@11:         av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
yading@11:                 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
yading@11:         if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
yading@11:             return ret;
yading@11: 
yading@11:         if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
yading@11:             return AVERROR(EINVAL);
yading@11:     } else {
yading@11:         av_dlog(s, "av_interleaved_write_frame FLUSH\n");
yading@11:         flush = 1;
yading@11:     }
yading@11: 
yading@11:     for (;; ) {
yading@11:         AVPacket opkt;
yading@11:         int ret = interleave_packet(s, &opkt, pkt, flush);
yading@11:         if (ret <= 0) //FIXME cleanup needed for ret<0 ?
yading@11:             return ret;
yading@11: 
yading@11:         ret = split_write_packet(s, &opkt);
yading@11:         if (ret >= 0)
yading@11:             s->streams[opkt.stream_index]->nb_frames++;
yading@11: 
yading@11:         av_free_packet(&opkt);
yading@11:         pkt = NULL;
yading@11: 
yading@11:         if (ret < 0)
yading@11:             return ret;
yading@11:         if(s->pb && s->pb->error)
yading@11:             return s->pb->error;
yading@11:     }
yading@11: }
yading@11: 
yading@11: int av_write_trailer(AVFormatContext *s)
yading@11: {
yading@11:     int ret, i;
yading@11: 
yading@11:     for (;; ) {
yading@11:         AVPacket pkt;
yading@11:         ret = interleave_packet(s, &pkt, NULL, 1);
yading@11:         if (ret < 0) //FIXME cleanup needed for ret<0 ?
yading@11:             goto fail;
yading@11:         if (!ret)
yading@11:             break;
yading@11: 
yading@11:         ret = split_write_packet(s, &pkt);
yading@11:         if (ret >= 0)
yading@11:             s->streams[pkt.stream_index]->nb_frames++;
yading@11: 
yading@11:         av_free_packet(&pkt);
yading@11: 
yading@11:         if (ret < 0)
yading@11:             goto fail;
yading@11:         if(s->pb && s->pb->error)
yading@11:             goto fail;
yading@11:     }
yading@11: 
yading@11:     if (s->oformat->write_trailer)
yading@11:         ret = s->oformat->write_trailer(s);
yading@11: 
yading@11: fail:
yading@11:     if (s->pb)
yading@11:        avio_flush(s->pb);
yading@11:     if (ret == 0)
yading@11:        ret = s->pb ? s->pb->error : 0;
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         av_freep(&s->streams[i]->priv_data);
yading@11:         av_freep(&s->streams[i]->index_entries);
yading@11:     }
yading@11:     if (s->oformat->priv_class)
yading@11:         av_opt_free(s->priv_data);
yading@11:     av_freep(&s->priv_data);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: int av_get_output_timestamp(struct AVFormatContext *s, int stream,
yading@11:                             int64_t *dts, int64_t *wall)
yading@11: {
yading@11:     if (!s->oformat || !s->oformat->get_output_timestamp)
yading@11:         return AVERROR(ENOSYS);
yading@11:     s->oformat->get_output_timestamp(s, stream, dts, wall);
yading@11:     return 0;
yading@11: }