return AVPROBE_SCORE_EXTENSION;
}
+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;
+}
+
AVInputFormat ff_flac_demuxer = {
.name = "flac",
.long_name = NULL_IF_CONFIG_SMALL("raw FLAC"),
.read_probe = flac_probe,
.read_header = flac_read_header,
.read_packet = ff_raw_read_partial_packet,
+ .read_timestamp = flac_read_timestamp,
.flags = AVFMT_GENERIC_INDEX,
.extensions = "flac",
.raw_codec_id = AV_CODEC_ID_FLAC,