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avformat/segafilm: implement seeking

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-10-30 12:07:13 +01:00
parent 55abb94b7d
commit e6cccf9daa
1 changed files with 21 additions and 0 deletions
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21
libavformat/segafilm.c
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@ -239,6 +239,11 @@ static int film_read_header(AVFormatContext *s)
film->sample_table[i].stream = film->video_stream_index;
film->sample_table[i].pts = AV_RB32(&scratch[8]) & 0x7FFFFFFF;
film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : 1;
av_add_index_entry(s->streams[film->video_stream_index],
film->sample_table[i].sample_offset,
film->sample_table[i].pts,
film->sample_table[i].sample_size, 0,
film->sample_table[i].keyframe);
}
}
@ -279,6 +284,21 @@ static int film_read_packet(AVFormatContext *s,
return ret;
}
static int film_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
{
FilmDemuxContext *film = s->priv_data;
AVStream *st = s->streams[stream_index];
int index = av_index_search_timestamp(st, timestamp, flags);
if (index < 0)
return -1;
if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
return -1;
film->current_sample = index;
return 0;
}
AVInputFormat ff_segafilm_demuxer = {
.name = "film_cpk",
.long_name = NULL_IF_CONFIG_SMALL("Sega FILM / CPK"),
@ -287,4 +307,5 @@ AVInputFormat ff_segafilm_demuxer = {
.read_header = film_read_header,
.read_packet = film_read_packet,
.read_close = film_read_close,
.read_seek = film_read_seek,
};