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avformat/mxfdec: rework mxf_essence_container_end

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We find the last essence container much faster if we go through the partitions
backwards...

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint
2019-04-07 02:06:35 +02:00
parent ea80af659c
commit a5136426a7
1 changed files with 3 additions and 6 deletions
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9
libavformat/mxfdec.c
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@@ -1545,10 +1545,7 @@ static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t of
*/ */
static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid) static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
{ {
int x; for (int x = mxf->partitions_count - 1; x >= 0; x--) {
int64_t ret = 0;
for (x = 0; x < mxf->partitions_count; x++) {
MXFPartition *p = &mxf->partitions[x]; MXFPartition *p = &mxf->partitions[x];
if (p->body_sid != body_sid) if (p->body_sid != body_sid)
@@ -1557,10 +1554,10 @@ static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
if (!p->essence_length) if (!p->essence_length)
return 0; return 0;
ret = p->essence_offset + p->essence_length; return p->essence_offset + p->essence_length;
} }
return ret; return 0;
} }
/* EditUnit -> absolute offset */ /* EditUnit -> absolute offset */