static int wav_read_packet(AVFormatContext *s, AVPacket *pkt) { int ret, size; int64_t left; AVStream *st; WAVDemuxContext *wav = s->priv_data; if (CONFIG_SPDIF_DEMUXER && wav->spdif == 0 && s->streams[0]->codec->codec_tag == 1) { enum AVCodecID codec; ret = ff_spdif_probe(s->pb->buffer, s->pb->buf_end - s->pb->buffer, &codec); if (ret > AVPROBE_SCORE_EXTENSION) { s->streams[0]->codec->codec_id = codec; wav->spdif = 1; } else { wav->spdif = -1; } } if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1) return ff_spdif_read_packet(s, pkt); if (wav->smv_data_ofs > 0) { int64_t audio_dts, video_dts; smv_retry: audio_dts = s->streams[0]->cur_dts; video_dts = s->streams[1]->cur_dts; if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) { audio_dts = av_rescale_q(audio_dts, s->streams[0]->time_base, AV_TIME_BASE_Q); video_dts = av_rescale_q(video_dts, s->streams[1]->time_base, AV_TIME_BASE_Q); /*We always return a video frame first to get the pixel format first*/ wav->smv_last_stream = wav->smv_given_first ? video_dts > audio_dts : 0; wav->smv_given_first = 1; } wav->smv_last_stream = !wav->smv_last_stream; wav->smv_last_stream |= wav->audio_eof; wav->smv_last_stream &= !wav->smv_eof; if (wav->smv_last_stream) { uint64_t old_pos = avio_tell(s->pb); uint64_t new_pos = wav->smv_data_ofs + wav->smv_block * wav->smv_block_size; if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) { ret = AVERROR_EOF; goto smv_out; } size = avio_rl24(s->pb); ret = av_get_packet(s->pb, pkt, size); if (ret < 0) goto smv_out; pkt->pos -= 3; pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt; wav->smv_cur_pt++; if (wav->smv_frames_per_jpeg > 0) wav->smv_cur_pt %= wav->smv_frames_per_jpeg; if (!wav->smv_cur_pt) wav->smv_block++; pkt->stream_index = 1; smv_out: avio_seek(s->pb, old_pos, SEEK_SET); if (ret == AVERROR_EOF) { wav->smv_eof = 1; goto smv_retry; } return ret; } } st = s->streams[0]; left = wav->data_end - avio_tell(s->pb); if (wav->ignore_length) left = INT_MAX; if (left <= 0) { if (CONFIG_W64_DEMUXER && wav->w64) left = find_guid(s->pb, ff_w64_guid_data) - 24; else left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a')); if (left < 0) { wav->audio_eof = 1; if (wav->smv_data_ofs > 0 && !wav->smv_eof) goto smv_retry; return AVERROR_EOF; } wav->data_end = avio_tell(s->pb) + left; } size = MAX_SIZE; if (st->codec->block_align > 1) { if (size < st->codec->block_align) size = st->codec->block_align; size = (size / st->codec->block_align) * st->codec->block_align; } size = FFMIN(size, left); ret = av_get_packet(s->pb, pkt, size); if (ret < 0) return ret; pkt->stream_index = 0; return ret; }
static int wav_read_packet(AVFormatContext *s, AVPacket *pkt) { int ret, size; int64_t left; AVStream *st; WAVDemuxContext *wav = s->priv_data; if (CONFIG_SPDIF_DEMUXER && wav->spdif == 0 && s->streams[0]->codec->codec_tag == 1) { enum AVCodecID codec; ret = ff_spdif_probe(s->pb->buffer, s->pb->buf_end - s->pb->buffer, &codec); if (ret > AVPROBE_SCORE_EXTENSION) { s->streams[0]->codec->codec_id = codec; wav->spdif = 1; } else { wav->spdif = -1; } } if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1) return ff_spdif_read_packet(s, pkt); if (wav->smv_data_ofs > 0) { int64_t audio_dts, video_dts; smv_retry: audio_dts = s->streams[0]->cur_dts; video_dts = s->streams[1]->cur_dts; if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) { audio_dts = av_rescale_q(audio_dts, s->streams[0]->time_base, AV_TIME_BASE_Q); video_dts = av_rescale_q(video_dts, s->streams[1]->time_base, AV_TIME_BASE_Q);   wav->smv_last_stream = wav->smv_given_first ? video_dts > audio_dts : 0; wav->smv_given_first = 1; } wav->smv_last_stream = !wav->smv_last_stream; wav->smv_last_stream |= wav->audio_eof; wav->smv_last_stream &= !wav->smv_eof; if (wav->smv_last_stream) { uint64_t old_pos = avio_tell(s->pb); uint64_t new_pos = wav->smv_data_ofs + wav->smv_block * wav->smv_block_size; if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) { ret = AVERROR_EOF; goto smv_out; } size = avio_rl24(s->pb); ret = av_get_packet(s->pb, pkt, size); if (ret < 0) goto smv_out; pkt->pos -= 3; pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt; wav->smv_cur_pt++; if (wav->smv_frames_per_jpeg > 0) wav->smv_cur_pt %= wav->smv_frames_per_jpeg; if (!wav->smv_cur_pt) wav->smv_block++; pkt->stream_index = 1; smv_out: avio_seek(s->pb, old_pos, SEEK_SET); if (ret == AVERROR_EOF) { wav->smv_eof = 1; goto smv_retry; } return ret; } } st = s->streams[0]; left = wav->data_end - avio_tell(s->pb); if (wav->ignore_length) left = INT_MAX; if (left <= 0) { if (CONFIG_W64_DEMUXER && wav->w64) left = find_guid(s->pb, ff_w64_guid_data) - 24; else left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a')); if (left < 0) { wav->audio_eof = 1; if (wav->smv_data_ofs > 0 && !wav->smv_eof) goto smv_retry; return AVERROR_EOF; } wav->data_end = avio_tell(s->pb) + left; } size = MAX_SIZE; if (st->codec->block_align > 1) { if (size < st->codec->block_align) size = st->codec->block_align; size = (size / st->codec->block_align) * st->codec->block_align; } size = FFMIN(size, left); ret = av_get_packet(s->pb, pkt, size); if (ret < 0) return ret; pkt->stream_index = 0; return ret; }