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skip outer pixels if possible in h264_loop_filter_luma_c().

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overall 3.7% faster loop filtering (C version only)

Originally committed as revision 21332 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-01-19 22:46:58 +00:00
parent 0e21dcdb13
commit c9640c17ac
1 changed files with 2 additions and 0 deletions
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2
libavcodec/dsputil.c
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@ -2999,10 +2999,12 @@ static inline void h264_loop_filter_luma_c(uint8_t *pix, int xstride, int ystrid
int i_delta; int i_delta;
if( FFABS( p2 - p0 ) < beta ) { if( FFABS( p2 - p0 ) < beta ) {
if(tc0[i])
pix[-2*xstride] = p1 + av_clip( (( p2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - p1, -tc0[i], tc0[i] ); pix[-2*xstride] = p1 + av_clip( (( p2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - p1, -tc0[i], tc0[i] );
tc++; tc++;
} }
if( FFABS( q2 - q0 ) < beta ) { if( FFABS( q2 - q0 ) < beta ) {
if(tc0[i])
pix[ xstride] = q1 + av_clip( (( q2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - q1, -tc0[i], tc0[i] ); pix[ xstride] = q1 + av_clip( (( q2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - q1, -tc0[i], tc0[i] );
tc++; tc++;
} }