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Code Issues Releases Activity

Simplify ifs(), 8 cpu cycles faster on pentium dual

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Originally committed as revision 16273 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-12-22 15:54:27 +00:00
parent 127a20e3b8
commit 60c6ba7aea
1 changed files with 4 additions and 12 deletions
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16
libavcodec/h264.c
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@ -135,26 +135,18 @@ static void fill_caches(H264Context *h, int mb_type, int for_deblock){
const int curr_mb_frame_flag = !IS_INTERLACED(mb_type);
const int bottom = (s->mb_y & 1);
tprintf(s->avctx, "fill_caches: curr_mb_frame_flag:%d, left_mb_frame_flag:%d, topleft_mb_frame_flag:%d, top_mb_frame_flag:%d, topright_mb_frame_flag:%d\n", curr_mb_frame_flag, left_mb_frame_flag, topleft_mb_frame_flag, top_mb_frame_flag, topright_mb_frame_flag);
if (bottom
? !curr_mb_frame_flag // bottom macroblock
: (!curr_mb_frame_flag && !top_mb_frame_flag) // top macroblock
) {
if (!curr_mb_frame_flag && (bottom || !top_mb_frame_flag)){
top_xy -= s->mb_stride;
}
if (bottom
? !curr_mb_frame_flag // bottom macroblock
: (!curr_mb_frame_flag && !topleft_mb_frame_flag) // top macroblock
) {
if (!curr_mb_frame_flag && (bottom || !topleft_mb_frame_flag)){
topleft_xy -= s->mb_stride;
} else if(bottom && curr_mb_frame_flag && !left_mb_frame_flag) {
topleft_xy += s->mb_stride;
// take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
topleft_partition = 0;
}
if (bottom
? !curr_mb_frame_flag // bottom macroblock
: (!curr_mb_frame_flag && !topright_mb_frame_flag) // top macroblock
) {
if (!curr_mb_frame_flag && (bottom || !topright_mb_frame_flag)){
topright_xy -= s->mb_stride;
}
if (left_mb_frame_flag != curr_mb_frame_flag) {