static int mp3_seek(AVFormatContext *s, int stream_index, int64_t timestamp,
int flags)
{
MP3DecContext *mp3 = s->priv_data;
AVIndexEntry *ie;
AVStream *st = s->streams[0];
int64_t ret = av_index_search_timestamp(st, timestamp, flags);
uint32_t header = 0;
if (!mp3->xing_toc)
return AVERROR(ENOSYS);
if (ret < 0)
return ret;
ie = &st->index_entries[ret];
ret = avio_seek(s->pb, ie->pos, SEEK_SET);
if (ret < 0)
return ret;
while (!s->pb->eof_reached) {
header = (header << 8) + avio_r8(s->pb);
if (ff_mpa_check_header(header) >= 0) {
ff_update_cur_dts(s, st, ie->timestamp);
ret = avio_seek(s->pb, -4, SEEK_CUR);
return (ret >= 0) ? 0 : ret;
}
}
return AVERROR_EOF;
}
static int idcin_read_seek(AVFormatContext *s, int stream_index,
int64_t timestamp, int flags)
{
IdcinDemuxContext *idcin = s->priv_data;
if (idcin->first_pkt_pos > 0) {
int ret = avio_seek(s->pb, idcin->first_pkt_pos, SEEK_SET);
if (ret < 0)
return ret;
ff_update_cur_dts(s, s->streams[idcin->video_stream_index], 0);
idcin->next_chunk_is_video = 1;
idcin->current_audio_chunk = 0;
return 0;
}
return -1;
}
static int read_seek(AVFormatContext *s, int stream_index,
int64_t timestamp, int flags)
{
AVStream *st = s->streams[stream_index];
BRSTMDemuxContext *b = s->priv_data;
int64_t ret = 0;
timestamp /= b->samples_per_block;
ret = avio_seek(s->pb, b->data_start + timestamp * b->block_size *
st->codec->channels, SEEK_SET);
if (ret < 0)
return ret;
b->current_block = timestamp;
ff_update_cur_dts(s, st, timestamp * b->samples_per_block);
return 0;
}
static int mp3_seek(AVFormatContext *s, int stream_index, int64_t timestamp,
int flags)
{
MP3DecContext *mp3 = s->priv_data;
AVIndexEntry *ie;
AVStream *st = s->streams[0];
int64_t ret = av_index_search_timestamp(st, timestamp, flags);
if (!mp3->xing_toc)
return AVERROR(ENOSYS);
if (ret < 0)
return ret;
ie = &st->index_entries[ret];
ret = reposition(s, ie->pos);
if (ret < 0)
return ret;
ff_update_cur_dts(s, st, ie->timestamp);
return 0;
}