static int raw_read_packet(AVFormatContext *s, AVPacket *pkt) { TAKDemuxContext *tc = s->priv_data; int ret; if (tc->mlast_frame) { AVIOContext *pb = s->pb; int64_t size, left; left = tc->data_end - avio_tell(pb); size = FFMIN(left, 1024); if (size <= 0) return AVERROR_EOF; ret = av_get_packet(pb, pkt, size); if (ret < 0) return ret; pkt->stream_index = 0; } else { ret = ff_raw_read_partial_packet(s, pkt); } return ret; }
static av_unused int64_t flac_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) { AVPacket pkt, out_pkt; AVStream *st = s->streams[stream_index]; AVCodecParserContext *parser; int ret; int64_t pts = AV_NOPTS_VALUE; if (avio_seek(s->pb, *ppos, SEEK_SET) < 0) return AV_NOPTS_VALUE; av_init_packet(&pkt); parser = av_parser_init(st->codec->codec_id); if (!parser){ return AV_NOPTS_VALUE; } parser->flags |= PARSER_FLAG_USE_CODEC_TS; for (;;){ ret = ff_raw_read_partial_packet(s, &pkt); if (ret < 0){ if (ret == AVERROR(EAGAIN)) continue; else break; } av_init_packet(&out_pkt); ret = av_parser_parse2(parser, st->codec, &out_pkt.data, &out_pkt.size, pkt.data, pkt.size, pkt.pts, pkt.dts, *ppos); av_free_packet(&pkt); if (out_pkt.size){ int size = out_pkt.size; if (parser->pts != AV_NOPTS_VALUE){ // seeking may not have started from beginning of a frame // calculate frame start position from next frame backwards *ppos = parser->next_frame_offset - size; pts = parser->pts; break; } } } av_parser_close(parser); return pts; }