[FFmpeg-cvslog] h264_mb: Use smaller data type for refs in await_references.

[Reimar Döffinger]

ffmpeg | branch: master | Reimar Döffinger <Reimar.Doeffinger at gmx.de> | Sat Nov 15 18:53:58 2014 +0100| [33fc1ccb4910b05a0f64b47fc2957fd73d5806ac] | committer: Reimar Döffinger

h264_mb: Use smaller data type for refs in await_references.

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 at gmx.de>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=33fc1ccb4910b05a0f64b47fc2957fd73d5806ac
---

 libavcodec/h264_mb.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/h264_mb.c b/libavcodec/h264_mb.c
index 7feae57..dd406c7 100644
--- a/libavcodec/h264_mb.c
+++ b/libavcodec/h264_mb.c
@@ -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;