yading@11: /*
yading@11:  * WAV demuxer
yading@11:  * Copyright (c) 2001, 2002 Fabrice Bellard
yading@11:  *
yading@11:  * Sony Wave64 demuxer
yading@11:  * RF64 demuxer
yading@11:  * Copyright (c) 2009 Daniel Verkamp
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: #include "libavutil/avassert.h"
yading@11: #include "libavutil/dict.h"
yading@11: #include "libavutil/log.h"
yading@11: #include "libavutil/mathematics.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "avio_internal.h"
yading@11: #include "pcm.h"
yading@11: #include "riff.h"
yading@11: #include "w64.h"
yading@11: #include "avio.h"
yading@11: #include "metadata.h"
yading@11: #include "spdif.h"
yading@11: 
yading@11: typedef struct WAVDemuxContext {
yading@11:     const AVClass *class;
yading@11:     int64_t data_end;
yading@11:     int w64;
yading@11:     int64_t smv_data_ofs;
yading@11:     int smv_block_size;
yading@11:     int smv_frames_per_jpeg;
yading@11:     int smv_block;
yading@11:     int smv_last_stream;
yading@11:     int smv_eof;
yading@11:     int audio_eof;
yading@11:     int ignore_length;
yading@11:     int spdif;
yading@11: } WAVDemuxContext;
yading@11: 
yading@11: 
yading@11: #if CONFIG_WAV_DEMUXER
yading@11: 
yading@11: static int64_t next_tag(AVIOContext *pb, uint32_t *tag)
yading@11: {
yading@11:     *tag = avio_rl32(pb);
yading@11:     return avio_rl32(pb);
yading@11: }
yading@11: 
yading@11: /* return the size of the found tag */
yading@11: static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
yading@11: {
yading@11:     unsigned int tag;
yading@11:     int64_t size;
yading@11: 
yading@11:     for (;;) {
yading@11:         if (url_feof(pb))
yading@11:             return -1;
yading@11:         size = next_tag(pb, &tag);
yading@11:         if (tag == tag1)
yading@11:             break;
yading@11:         avio_skip(pb, size + (size & 1));
yading@11:     }
yading@11:     return size;
yading@11: }
yading@11: 
yading@11: static int wav_probe(AVProbeData *p)
yading@11: {
yading@11:     /* check file header */
yading@11:     if (p->buf_size <= 32)
yading@11:         return 0;
yading@11:     if (!memcmp(p->buf + 8, "WAVE", 4)) {
yading@11:         if (!memcmp(p->buf, "RIFF", 4))
yading@11:             /*
yading@11:               Since ACT demuxer has standard WAV header at top of it's own,
yading@11:               returning score is decreased to avoid probe conflict
yading@11:               between ACT and WAV.
yading@11:             */
yading@11:             return AVPROBE_SCORE_MAX - 1;
yading@11:         else if (!memcmp(p->buf,      "RF64", 4) &&
yading@11:                  !memcmp(p->buf + 12, "ds64", 4))
yading@11:             return AVPROBE_SCORE_MAX;
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static void handle_stream_probing(AVStream *st)
yading@11: {
yading@11:     if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
yading@11:         st->request_probe = AVPROBE_SCORE_MAX/2;
yading@11:         st->probe_packets = FFMIN(st->probe_packets, 4);
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int ret;
yading@11: 
yading@11:     /* parse fmt header */
yading@11:     *st = avformat_new_stream(s, NULL);
yading@11:     if (!*st)
yading@11:         return AVERROR(ENOMEM);
yading@11: 
yading@11:     ret = ff_get_wav_header(pb, (*st)->codec, size);
yading@11:     if (ret < 0)
yading@11:         return ret;
yading@11:     handle_stream_probing(*st);
yading@11: 
yading@11:     (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
yading@11: 
yading@11:     avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
yading@11:                                         int length)
yading@11: {
yading@11:     char temp[257];
yading@11:     int ret;
yading@11: 
yading@11:     av_assert0(length <= sizeof(temp));
yading@11:     if ((ret = avio_read(s->pb, temp, length)) < 0)
yading@11:         return ret;
yading@11: 
yading@11:     temp[length] = 0;
yading@11: 
yading@11:     if (strlen(temp))
yading@11:         return av_dict_set(&s->metadata, key, temp, 0);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
yading@11: {
yading@11:     char temp[131], *coding_history;
yading@11:     int ret, x;
yading@11:     uint64_t time_reference;
yading@11:     int64_t umid_parts[8], umid_mask = 0;
yading@11: 
yading@11:     if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
yading@11:         (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
yading@11:         (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
yading@11:         (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
yading@11:         (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
yading@11:         return ret;
yading@11: 
yading@11:     time_reference = avio_rl64(s->pb);
yading@11:     snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
yading@11:     if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
yading@11:         return ret;
yading@11: 
yading@11:     /* check if version is >= 1, in which case an UMID may be present */
yading@11:     if (avio_rl16(s->pb) >= 1) {
yading@11:         for (x = 0; x < 8; x++)
yading@11:             umid_mask |= umid_parts[x] = avio_rb64(s->pb);
yading@11: 
yading@11:         if (umid_mask) {
yading@11:             /* the string formatting below is per SMPTE 330M-2004 Annex C */
yading@11:             if (umid_parts[4] == 0 && umid_parts[5] == 0 && umid_parts[6] == 0 && umid_parts[7] == 0) {
yading@11:                 /* basic UMID */
yading@11:                 snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
yading@11:                          umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3]);
yading@11:             } else {
yading@11:                 /* extended UMID */
yading@11:                 snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
yading@11:                                                "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
yading@11:                          umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3],
yading@11:                          umid_parts[4], umid_parts[5], umid_parts[6], umid_parts[7]);
yading@11:             }
yading@11: 
yading@11:             if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
yading@11:                 return ret;
yading@11:         }
yading@11: 
yading@11:         avio_skip(s->pb, 190);
yading@11:     } else
yading@11:         avio_skip(s->pb, 254);
yading@11: 
yading@11:     if (size > 602) {
yading@11:         /* CodingHistory present */
yading@11:         size -= 602;
yading@11: 
yading@11:         if (!(coding_history = av_malloc(size+1)))
yading@11:             return AVERROR(ENOMEM);
yading@11: 
yading@11:         if ((ret = avio_read(s->pb, coding_history, size)) < 0)
yading@11:             return ret;
yading@11: 
yading@11:         coding_history[size] = 0;
yading@11:         if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
yading@11:                                AV_DICT_DONT_STRDUP_VAL)) < 0)
yading@11:             return ret;
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static const AVMetadataConv wav_metadata_conv[] = {
yading@11:     {"description",      "comment"      },
yading@11:     {"originator",       "encoded_by"   },
yading@11:     {"origination_date", "date"         },
yading@11:     {"origination_time", "creation_time"},
yading@11:     {0},
yading@11: };
yading@11: 
yading@11: /* wav input */
yading@11: static int wav_read_header(AVFormatContext *s)
yading@11: {
yading@11:     int64_t size, av_uninit(data_size);
yading@11:     int64_t sample_count=0;
yading@11:     int rf64;
yading@11:     uint32_t tag;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVStream *st = NULL;
yading@11:     WAVDemuxContext *wav = s->priv_data;
yading@11:     int ret, got_fmt = 0;
yading@11:     int64_t next_tag_ofs, data_ofs = -1;
yading@11: 
yading@11:     wav->smv_data_ofs = -1;
yading@11: 
yading@11:     /* check RIFF header */
yading@11:     tag = avio_rl32(pb);
yading@11: 
yading@11:     rf64 = tag == MKTAG('R', 'F', '6', '4');
yading@11:     if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
yading@11:         return -1;
yading@11:     avio_rl32(pb); /* file size */
yading@11:     tag = avio_rl32(pb);
yading@11:     if (tag != MKTAG('W', 'A', 'V', 'E'))
yading@11:         return -1;
yading@11: 
yading@11:     if (rf64) {
yading@11:         if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
yading@11:             return -1;
yading@11:         size = avio_rl32(pb);
yading@11:         if (size < 24)
yading@11:             return -1;
yading@11:         avio_rl64(pb); /* RIFF size */
yading@11:         data_size = avio_rl64(pb);
yading@11:         sample_count = avio_rl64(pb);
yading@11:         if (data_size < 0 || sample_count < 0) {
yading@11:             av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
yading@11:                    "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
yading@11:                    data_size, sample_count);
yading@11:             return AVERROR_INVALIDDATA;
yading@11:         }
yading@11:         avio_skip(pb, size - 24); /* skip rest of ds64 chunk */
yading@11: 
yading@11:     }
yading@11: 
yading@11:     for (;;) {
yading@11:         AVStream *vst;
yading@11:         size = next_tag(pb, &tag);
yading@11:         next_tag_ofs = avio_tell(pb) + size;
yading@11: 
yading@11:         if (url_feof(pb))
yading@11:             break;
yading@11: 
yading@11:         switch (tag) {
yading@11:         case MKTAG('f', 'm', 't', ' '):
yading@11:             /* only parse the first 'fmt ' tag found */
yading@11:             if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) {
yading@11:                 return ret;
yading@11:             } else if (got_fmt)
yading@11:                 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
yading@11: 
yading@11:             got_fmt = 1;
yading@11:             break;
yading@11:         case MKTAG('d', 'a', 't', 'a'):
yading@11:             if (!got_fmt) {
yading@11:                 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'data' tag\n");
yading@11:                 return AVERROR_INVALIDDATA;
yading@11:             }
yading@11: 
yading@11:             if (rf64) {
yading@11:                 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
yading@11:             } else {
yading@11:                 data_size = size;
yading@11:                 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
yading@11:             }
yading@11: 
yading@11:             data_ofs = avio_tell(pb);
yading@11: 
yading@11:             /* don't look for footer metadata if we can't seek or if we don't
yading@11:              * know where the data tag ends
yading@11:              */
yading@11:             if (!pb->seekable || (!rf64 && !size))
yading@11:                 goto break_loop;
yading@11:             break;
yading@11:         case MKTAG('f','a','c','t'):
yading@11:             if (!sample_count)
yading@11:                 sample_count = avio_rl32(pb);
yading@11:             break;
yading@11:         case MKTAG('b','e','x','t'):
yading@11:             if ((ret = wav_parse_bext_tag(s, size)) < 0)
yading@11:                 return ret;
yading@11:             break;
yading@11:         case MKTAG('S','M','V','0'):
yading@11:             if (!got_fmt) {
yading@11:                 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
yading@11:                 return AVERROR_INVALIDDATA;
yading@11:             }
yading@11:             // SMV file, a wav file with video appended.
yading@11:             if (size != MKTAG('0','2','0','0')) {
yading@11:                 av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
yading@11:                 goto break_loop;
yading@11:             }
yading@11:             av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
yading@11:             vst = avformat_new_stream(s, NULL);
yading@11:             if (!vst)
yading@11:                 return AVERROR(ENOMEM);
yading@11:             avio_r8(pb);
yading@11:             vst->id = 1;
yading@11:             vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
yading@11:             vst->codec->codec_id = AV_CODEC_ID_MJPEG;
yading@11:             vst->codec->width  = avio_rl24(pb);
yading@11:             vst->codec->height = avio_rl24(pb);
yading@11:             size = avio_rl24(pb);
yading@11:             wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
yading@11:             avio_rl24(pb);
yading@11:             wav->smv_block_size = avio_rl24(pb);
yading@11:             avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
yading@11:             vst->duration = avio_rl24(pb);
yading@11:             avio_rl24(pb);
yading@11:             avio_rl24(pb);
yading@11:             wav->smv_frames_per_jpeg = avio_rl24(pb);
yading@11:             goto break_loop;
yading@11:         case MKTAG('L', 'I', 'S', 'T'):
yading@11:             if (size < 4) {
yading@11:                 av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
yading@11:                 return AVERROR_INVALIDDATA;
yading@11:             }
yading@11:             switch (avio_rl32(pb)) {
yading@11:             case MKTAG('I', 'N', 'F', 'O'):
yading@11:                 ff_read_riff_info(s, size - 4);
yading@11:             }
yading@11:             break;
yading@11:         }
yading@11: 
yading@11:         /* skip padding byte */
yading@11:         next_tag_ofs += (next_tag_ofs < INT64_MAX && next_tag_ofs & 1);
yading@11: 
yading@11:         /* seek to next tag unless we know that we'll run into EOF */
yading@11:         if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
yading@11:             avio_seek(pb, next_tag_ofs, SEEK_SET) < 0) {
yading@11:             break;
yading@11:         }
yading@11:     }
yading@11: break_loop:
yading@11:     if (data_ofs < 0) {
yading@11:         av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     }
yading@11: 
yading@11:     avio_seek(pb, data_ofs, SEEK_SET);
yading@11: 
yading@11:     if (!sample_count && st->codec->channels && av_get_bits_per_sample(st->codec->codec_id) && wav->data_end <= avio_size(pb))
yading@11:         sample_count = (data_size<<3) / (st->codec->channels * (uint64_t)av_get_bits_per_sample(st->codec->codec_id));
yading@11:     if (sample_count)
yading@11:         st->duration = sample_count;
yading@11: 
yading@11:     ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
yading@11:     ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: /** Find chunk with w64 GUID by skipping over other chunks
yading@11:  * @return the size of the found chunk
yading@11:  */
yading@11: static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
yading@11: {
yading@11:     uint8_t guid[16];
yading@11:     int64_t size;
yading@11: 
yading@11:     while (!url_feof(pb)) {
yading@11:         avio_read(pb, guid, 16);
yading@11:         size = avio_rl64(pb);
yading@11:         if (size <= 24)
yading@11:             return -1;
yading@11:         if (!memcmp(guid, guid1, 16))
yading@11:             return size;
yading@11:         avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
yading@11:     }
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: #define MAX_SIZE 4096
yading@11: 
yading@11: static int wav_read_packet(AVFormatContext *s,
yading@11:                            AVPacket *pkt)
yading@11: {
yading@11:     int ret, size;
yading@11:     int64_t left;
yading@11:     AVStream *st;
yading@11:     WAVDemuxContext *wav = s->priv_data;
yading@11: 
yading@11:     if (CONFIG_SPDIF_DEMUXER && wav->spdif == 0 &&
yading@11:         s->streams[0]->codec->codec_tag == 1) {
yading@11:         enum AVCodecID codec;
yading@11:         ret = ff_spdif_probe(s->pb->buffer, s->pb->buf_end - s->pb->buffer,
yading@11:                              &codec);
yading@11:         if (ret > AVPROBE_SCORE_MAX / 2) {
yading@11:             s->streams[0]->codec->codec_id = codec;
yading@11:             wav->spdif = 1;
yading@11:         } else {
yading@11:             wav->spdif = -1;
yading@11:         }
yading@11:     }
yading@11:     if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1)
yading@11:         return ff_spdif_read_packet(s, pkt);
yading@11: 
yading@11:     if (wav->smv_data_ofs > 0) {
yading@11:         int64_t audio_dts, video_dts;
yading@11: smv_retry:
yading@11:         audio_dts = s->streams[0]->cur_dts;
yading@11:         video_dts = s->streams[1]->cur_dts;
yading@11:         if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
yading@11:             audio_dts = av_rescale_q(audio_dts, s->streams[0]->time_base, AV_TIME_BASE_Q);
yading@11:             video_dts = av_rescale_q(video_dts, s->streams[1]->time_base, AV_TIME_BASE_Q);
yading@11:             wav->smv_last_stream = video_dts >= audio_dts;
yading@11:         }
yading@11:         wav->smv_last_stream = !wav->smv_last_stream;
yading@11:         wav->smv_last_stream |= wav->audio_eof;
yading@11:         wav->smv_last_stream &= !wav->smv_eof;
yading@11:         if (wav->smv_last_stream) {
yading@11:             uint64_t old_pos = avio_tell(s->pb);
yading@11:             uint64_t new_pos = wav->smv_data_ofs +
yading@11:                 wav->smv_block * wav->smv_block_size;
yading@11:             if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
yading@11:                 ret = AVERROR_EOF;
yading@11:                 goto smv_out;
yading@11:             }
yading@11:             size = avio_rl24(s->pb);
yading@11:             ret  = av_get_packet(s->pb, pkt, size);
yading@11:             if (ret < 0)
yading@11:                 goto smv_out;
yading@11:             pkt->pos -= 3;
yading@11:             pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg;
yading@11:             wav->smv_block++;
yading@11:             pkt->stream_index = 1;
yading@11: smv_out:
yading@11:             avio_seek(s->pb, old_pos, SEEK_SET);
yading@11:             if (ret == AVERROR_EOF) {
yading@11:                 wav->smv_eof = 1;
yading@11:                 goto smv_retry;
yading@11:             }
yading@11:             return ret;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     st = s->streams[0];
yading@11: 
yading@11:     left = wav->data_end - avio_tell(s->pb);
yading@11:     if (wav->ignore_length)
yading@11:         left= INT_MAX;
yading@11:     if (left <= 0){
yading@11:         if (CONFIG_W64_DEMUXER && wav->w64)
yading@11:             left = find_guid(s->pb, ff_w64_guid_data) - 24;
yading@11:         else
yading@11:             left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
yading@11:         if (left < 0) {
yading@11:             wav->audio_eof = 1;
yading@11:             if (wav->smv_data_ofs > 0 && !wav->smv_eof)
yading@11:                 goto smv_retry;
yading@11:             return AVERROR_EOF;
yading@11:         }
yading@11:         wav->data_end= avio_tell(s->pb) + left;
yading@11:     }
yading@11: 
yading@11:     size = MAX_SIZE;
yading@11:     if (st->codec->block_align > 1) {
yading@11:         if (size < st->codec->block_align)
yading@11:             size = st->codec->block_align;
yading@11:         size = (size / st->codec->block_align) * st->codec->block_align;
yading@11:     }
yading@11:     size = FFMIN(size, left);
yading@11:     ret  = av_get_packet(s->pb, pkt, size);
yading@11:     if (ret < 0)
yading@11:         return ret;
yading@11:     pkt->stream_index = 0;
yading@11: 
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int wav_read_seek(AVFormatContext *s,
yading@11:                          int stream_index, int64_t timestamp, int flags)
yading@11: {
yading@11:     WAVDemuxContext *wav = s->priv_data;
yading@11:     AVStream *st;
yading@11:     wav->smv_eof = 0;
yading@11:     wav->audio_eof = 0;
yading@11:     if (wav->smv_data_ofs > 0) {
yading@11:         int64_t smv_timestamp = timestamp;
yading@11:         if (stream_index == 0)
yading@11:             smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base);
yading@11:         else
yading@11:             timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base);
yading@11:         wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg;
yading@11:     }
yading@11: 
yading@11:     st = s->streams[0];
yading@11:     switch (st->codec->codec_id) {
yading@11:     case AV_CODEC_ID_MP2:
yading@11:     case AV_CODEC_ID_MP3:
yading@11:     case AV_CODEC_ID_AC3:
yading@11:     case AV_CODEC_ID_DTS:
yading@11:         /* use generic seeking with dynamically generated indexes */
yading@11:         return -1;
yading@11:     default:
yading@11:         break;
yading@11:     }
yading@11:     return ff_pcm_read_seek(s, stream_index, timestamp, flags);
yading@11: }
yading@11: 
yading@11: #define OFFSET(x) offsetof(WAVDemuxContext, x)
yading@11: #define DEC AV_OPT_FLAG_DECODING_PARAM
yading@11: static const AVOption demux_options[] = {
yading@11:     { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, DEC },
yading@11:     { NULL },
yading@11: };
yading@11: 
yading@11: static const AVClass wav_demuxer_class = {
yading@11:     .class_name = "WAV demuxer",
yading@11:     .item_name  = av_default_item_name,
yading@11:     .option     = demux_options,
yading@11:     .version    = LIBAVUTIL_VERSION_INT,
yading@11: };
yading@11: AVInputFormat ff_wav_demuxer = {
yading@11:     .name           = "wav",
yading@11:     .long_name      = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
yading@11:     .priv_data_size = sizeof(WAVDemuxContext),
yading@11:     .read_probe     = wav_probe,
yading@11:     .read_header    = wav_read_header,
yading@11:     .read_packet    = wav_read_packet,
yading@11:     .read_seek      = wav_read_seek,
yading@11:     .flags          = AVFMT_GENERIC_INDEX,
yading@11:     .codec_tag      = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
yading@11:     .priv_class     = &wav_demuxer_class,
yading@11: };
yading@11: #endif /* CONFIG_WAV_DEMUXER */
yading@11: 
yading@11: 
yading@11: #if CONFIG_W64_DEMUXER
yading@11: static int w64_probe(AVProbeData *p)
yading@11: {
yading@11:     if (p->buf_size <= 40)
yading@11:         return 0;
yading@11:     if (!memcmp(p->buf,      ff_w64_guid_riff, 16) &&
yading@11:         !memcmp(p->buf + 24, ff_w64_guid_wave, 16))
yading@11:         return AVPROBE_SCORE_MAX;
yading@11:     else
yading@11:         return 0;
yading@11: }
yading@11: 
yading@11: static int w64_read_header(AVFormatContext *s)
yading@11: {
yading@11:     int64_t size, data_ofs = 0;
yading@11:     AVIOContext *pb  = s->pb;
yading@11:     WAVDemuxContext    *wav = s->priv_data;
yading@11:     AVStream *st;
yading@11:     uint8_t guid[16];
yading@11:     int ret;
yading@11: 
yading@11:     avio_read(pb, guid, 16);
yading@11:     if (memcmp(guid, ff_w64_guid_riff, 16))
yading@11:         return -1;
yading@11: 
yading@11:     if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
yading@11:         return -1;
yading@11: 
yading@11:     avio_read(pb, guid, 16);
yading@11:     if (memcmp(guid, ff_w64_guid_wave, 16)) {
yading@11:         av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
yading@11:         return -1;
yading@11:     }
yading@11: 
yading@11:     wav->w64 = 1;
yading@11: 
yading@11:     st = avformat_new_stream(s, NULL);
yading@11:     if (!st)
yading@11:         return AVERROR(ENOMEM);
yading@11: 
yading@11:     while (!url_feof(pb)) {
yading@11:         if (avio_read(pb, guid, 16) != 16)
yading@11:             break;
yading@11:         size = avio_rl64(pb);
yading@11:         if (size <= 24 || INT64_MAX - size < avio_tell(pb))
yading@11:             return AVERROR_INVALIDDATA;
yading@11: 
yading@11:         if (!memcmp(guid, ff_w64_guid_fmt, 16)) {
yading@11:             /* subtract chunk header size - normal wav file doesn't count it */
yading@11:             ret = ff_get_wav_header(pb, st->codec, size - 24);
yading@11:             if (ret < 0)
yading@11:                 return ret;
yading@11:             avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
yading@11: 
yading@11:             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
yading@11:         } else if (!memcmp(guid, ff_w64_guid_fact, 16)) {
yading@11:             int64_t samples;
yading@11: 
yading@11:             samples = avio_rl64(pb);
yading@11:             if (samples > 0)
yading@11:                 st->duration = samples;
yading@11:         } else if (!memcmp(guid, ff_w64_guid_data, 16)) {
yading@11:             wav->data_end = avio_tell(pb) + size - 24;
yading@11: 
yading@11:             data_ofs = avio_tell(pb);
yading@11:             if (!pb->seekable)
yading@11:                 break;
yading@11: 
yading@11:             avio_skip(pb, size - 24);
yading@11:         } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
yading@11:             int64_t start, end, cur;
yading@11:             uint32_t count, chunk_size, i;
yading@11: 
yading@11:             start = avio_tell(pb);
yading@11:             end = start + size;
yading@11:             count = avio_rl32(pb);
yading@11: 
yading@11:             for (i = 0; i < count; i++) {
yading@11:                 char chunk_key[5], *value;
yading@11: 
yading@11:                 if (url_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
yading@11:                     break;
yading@11: 
yading@11:                 chunk_key[4] = 0;
yading@11:                 avio_read(pb, chunk_key, 4);
yading@11:                 chunk_size = avio_rl32(pb);
yading@11: 
yading@11:                 value = av_mallocz(chunk_size + 1);
yading@11:                 if (!value)
yading@11:                     return AVERROR(ENOMEM);
yading@11: 
yading@11:                 ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
yading@11:                 avio_skip(pb, chunk_size - ret);
yading@11: 
yading@11:                 av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
yading@11:             }
yading@11: 
yading@11:             avio_skip(pb, end - avio_tell(pb));
yading@11:         } else {
yading@11:             av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
yading@11:             avio_skip(pb, size - 24);
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (!data_ofs)
yading@11:         return AVERROR_EOF;
yading@11: 
yading@11:     ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
yading@11:     ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
yading@11: 
yading@11:     handle_stream_probing(st);
yading@11:     st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
yading@11: 
yading@11:     avio_seek(pb, data_ofs, SEEK_SET);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: AVInputFormat ff_w64_demuxer = {
yading@11:     .name           = "w64",
yading@11:     .long_name      = NULL_IF_CONFIG_SMALL("Sony Wave64"),
yading@11:     .priv_data_size = sizeof(WAVDemuxContext),
yading@11:     .read_probe     = w64_probe,
yading@11:     .read_header    = w64_read_header,
yading@11:     .read_packet    = wav_read_packet,
yading@11:     .read_seek      = wav_read_seek,
yading@11:     .flags          = AVFMT_GENERIC_INDEX,
yading@11:     .codec_tag      = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
yading@11: };
yading@11: #endif /* CONFIG_W64_DEMUXER */