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Seek function for TMV 

Originally committed as revision 20336 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Daniel Verkamp 2009-10-20 19:27:25 +00:00
parent 0319ba5e12
commit 61ee504517
1 changed files with 21 additions and 0 deletions
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21
libavformat/tmv.c
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@ -43,6 +43,8 @@ typedef struct TMVContext {
unsigned stream_index;
} TMVContext;
#define TMV_HEADER_SIZE 12
#define PROBE_MIN_SAMPLE_RATE 5000
#define PROBE_MAX_FPS 120
#define PROBE_MIN_AUDIO_SIZE (PROBE_MIN_SAMPLE_RATE / PROBE_MAX_FPS)
@ -160,6 +162,23 @@ static int tmv_read_packet(AVFormatContext *s, AVPacket *pkt)
return ret;
}
static int tmv_read_seek(AVFormatContext *s, int stream_index,
int64_t timestamp, int flags)
{
TMVContext *tmv = s->priv_data;
int64_t pos;
if (stream_index)
return -1;
pos = timestamp *
(tmv->audio_chunk_size + tmv->video_chunk_size + tmv->padding);
url_fseek(s->pb, pos + TMV_HEADER_SIZE, SEEK_SET);
tmv->stream_index = 0;
return 0;
}
AVInputFormat tmv_demuxer = {
"tmv",
NULL_IF_CONFIG_SMALL("8088flex TMV"),
@ -167,5 +186,7 @@ AVInputFormat tmv_demuxer = {
tmv_probe,
tmv_read_header,
tmv_read_packet,
NULL,
tmv_read_seek,
.flags = AVFMT_GENERIC_INDEX,
};