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lavf/brstm: add support for seeking

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Rodger Combs 2015-06-20 05:01:21 -05:00 committed by Paul B Mahol
parent 70a39bcf1c
commit 9c9cf3956c
1 changed files with 23 additions and 0 deletions
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23
libavformat/brstm.c
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@ -32,6 +32,7 @@ typedef struct BRSTMDemuxContext {
uint32_t last_block_used_bytes;
uint32_t last_block_size;
uint32_t last_block_samples;
uint32_t data_start;
uint8_t *table;
uint8_t *adpc;
int little_endian;
@ -312,6 +313,8 @@ static int read_header(AVFormatContext *s)
codec == AV_CODEC_ID_ADPCM_THP_LE))
avio_skip(s->pb, 24);
b->data_start = avio_tell(s->pb);
if ((major != 1 || minor) && !bfstm)
avpriv_request_sample(s, "Version %d.%d", major, minor);
@ -391,6 +394,24 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
return ret;
}
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;
}
AVInputFormat ff_brstm_demuxer = {
.name = "brstm",
.long_name = NULL_IF_CONFIG_SMALL("BRSTM (Binary Revolution Stream)"),
@ -399,6 +420,7 @@ AVInputFormat ff_brstm_demuxer = {
.read_header = read_header,
.read_packet = read_packet,
.read_close = read_close,
.read_seek = read_seek,
.extensions = "brstm",
};
@ -410,5 +432,6 @@ AVInputFormat ff_bfstm_demuxer = {
.read_header = read_header,
.read_packet = read_packet,
.read_close = read_close,
.read_seek = read_seek,
.extensions = "bfstm,bcstm",
};