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img2dec: seeking support 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-01-08 11:43:07 +00:00
parent 86159703f5
commit 55d32eed8f
1 changed files with 12 additions and 0 deletions
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12
libavformat/img2dec.c
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@ -393,6 +393,7 @@ static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
return AVERROR(ENOMEM);
pkt->stream_index = 0;
pkt->flags |= AV_PKT_FLAG_KEY;
pkt->pts = s->img_number - s->img_first;
pkt->size = 0;
for (i = 0; i < 3; i++) {
@ -426,6 +427,16 @@ static int img_read_close(struct AVFormatContext* s1)
return 0;
}
static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
{
VideoDemuxData *s1 = s->priv_data;
if (timestamp < 0 || timestamp > s1->img_last - s1->img_first)
return -1;
s1->img_number = timestamp + s1->img_first;
return 0;
}
#define OFFSET(x) offsetof(VideoDemuxData, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
@ -460,6 +471,7 @@ AVInputFormat ff_image2_demuxer = {
.read_header = img_read_header,
.read_packet = img_read_packet,
.read_close = img_read_close,
.read_seek = img_read_seek,
.flags = AVFMT_NOFILE,
.priv_class = &img2_class,
};