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h264_mb: Use smaller data type for refs in await_references.

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As far as I can tell the value can never go outside
the int16_t type.
And especially the cost of the initialization is
reduced quite a bit by making it smaller.
Overall decoding speedup not measurable though.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2014-11-15 18:53:58 +01:00
parent 478c61ccb2
commit 33fc1ccb49
1 changed files with 2 additions and 2 deletions
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4
libavcodec/h264_mb.c
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@ -49,7 +49,7 @@ static inline int get_lowest_part_list_y(H264Context *h, H264Picture *pic, int n
return FFMAX(0, bottom);
}
static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n,
static inline void get_lowest_part_y(H264Context *h, int16_t refs[2][48], int n,
int height, int y_offset, int list0,
int list1, int *nrefs)
{
@ -96,7 +96,7 @@ static void await_references(H264Context *h)
{
const int mb_xy = h->mb_xy;
const int mb_type = h->cur_pic.mb_type[mb_xy];
int refs[2][48];
int16_t refs[2][48];
int nrefs[2] = { 0 };
int ref, list;