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avformat/wvdec: fix seeking

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While I'm not sure why exactly sure why the old code could end up in the
wrong position, using the generic index code is much simpler and is
known to work correctly.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
wm4 2015-04-23 13:33:06 +02:00 committed by Michael Niedermayer
parent cd69c0e018
commit 0f776df09e
1 changed files with 2 additions and 36 deletions
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38
libavformat/wvdec.c
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@ -296,6 +296,7 @@ static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
}
}
pkt->stream_index = 0;
pkt->pos = pos;
wc->block_parsed = 1;
pkt->pts = wc->header.block_idx;
block_samples = wc->header.samples;
@ -305,41 +306,6 @@ static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
else
pkt->duration = block_samples;
av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
return 0;
}
static int wv_read_seek(AVFormatContext *s, int stream_index,
int64_t timestamp, int flags)
{
AVStream *st = s->streams[stream_index];
WVContext *wc = s->priv_data;
AVPacket pkt1, *pkt = &pkt1;
int ret;
int index = av_index_search_timestamp(st, timestamp, flags);
int64_t pos, pts;
/* if found, seek there */
if (index >= 0 &&
timestamp <= st->index_entries[st->nb_index_entries - 1].timestamp) {
wc->block_parsed = 1;
avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
return 0;
}
/* if timestamp is out of bounds, return error */
if (timestamp < 0 || timestamp >= s->duration)
return AVERROR(EINVAL);
pos = avio_tell(s->pb);
do {
ret = av_read_frame(s, pkt);
if (ret < 0) {
avio_seek(s->pb, pos, SEEK_SET);
return ret;
}
pts = pkt->pts;
av_free_packet(pkt);
} while(pts < timestamp);
return 0;
}
@ -350,5 +316,5 @@ AVInputFormat ff_wv_demuxer = {
.read_probe = wv_probe,
.read_header = wv_read_header,
.read_packet = wv_read_packet,
.read_seek = wv_read_seek,
.flags = AVFMT_GENERIC_INDEX,
};