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avformat/matroskadec: Add function to reset status

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This function will be useful later to reset the status (e.g. current
level and the already parsed id).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2019-05-17 00:30:02 +02:00 committed by James Almer
parent 27f40b1dcd
commit 310f326b43
1 changed files with 19 additions and 0 deletions
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19
libavformat/matroskadec.c
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@ -739,6 +739,25 @@ static const char *const matroska_doctypes[] = { "matroska", "webm" };
static int matroska_read_close(AVFormatContext *s);
/*
* This function prepares the status for parsing of level 1 elements.
*/
static int matroska_reset_status(MatroskaDemuxContext *matroska,
uint32_t id, int64_t position)
{
if (position >= 0) {
int err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
if (err < 0)
return err;
}
matroska->current_id = id;
matroska->num_levels = 1;
matroska->current_cluster.pos = 0;
return 0;
}
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
{
AVIOContext *pb = matroska->ctx->pb;