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authorRonald S. Bultje <rsbultje@gmail.com>2013-02-18 21:03:02 -0800
committerMichael Niedermayer <michaelni@gmx.at>2013-02-19 16:25:50 +0100
commit1acd7d594c15aa491729c837ad3519d3469e620a (patch)
tree4a515aa31c7483d8a2fdfa1d4399c9a9d2b29cae /libavcodec/h264idct_template.c
parenta1f1ca96b42698002920467c0aab9e636893088a (diff)
downloadffmpeg-1acd7d594c15aa491729c837ad3519d3469e620a.tar.gz
h264: integrate clear_blocks calls with IDCT.
The non-intra-pcm branch in hl_decode_mb (simple, 8bpp) goes from 700 to 672 cycles, and the complete loop of decode_mb_cabac and hl_decode_mb (in the decode_slice loop) goes from 1759 to 1733 cycles on the clip tested (cathedral), i.e. almost 30 cycles per mb faster. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/h264idct_template.c')
-rw-r--r--libavcodec/h264idct_template.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/libavcodec/h264idct_template.c b/libavcodec/h264idct_template.c
index b0ab847d70..9f16e1d2e0 100644
--- a/libavcodec/h264idct_template.c
+++ b/libavcodec/h264idct_template.c
@@ -61,6 +61,8 @@ void FUNCC(ff_h264_idct_add)(uint8_t *_dst, int16_t *_block, int stride)
dst[i + 2*stride]= av_clip_pixel(dst[i + 2*stride] + ((z1 - z2) >> 6));
dst[i + 3*stride]= av_clip_pixel(dst[i + 3*stride] + ((z0 - z3) >> 6));
}
+
+ memset(block, 0, 16 * sizeof(dctcoef));
}
void FUNCC(ff_h264_idct8_add)(uint8_t *_dst, int16_t *_block, int stride){
@@ -133,14 +135,18 @@ void FUNCC(ff_h264_idct8_add)(uint8_t *_dst, int16_t *_block, int stride){
dst[i + 6*stride] = av_clip_pixel( dst[i + 6*stride] + ((b2 - b5) >> 6) );
dst[i + 7*stride] = av_clip_pixel( dst[i + 7*stride] + ((b0 - b7) >> 6) );
}
+
+ memset(block, 0, 64 * sizeof(dctcoef));
}
// assumes all AC coefs are 0
-void FUNCC(ff_h264_idct_dc_add)(uint8_t *_dst, int16_t *block, int stride){
+void FUNCC(ff_h264_idct_dc_add)(uint8_t *_dst, int16_t *_block, int stride){
int i, j;
- int dc = (((dctcoef*)block)[0] + 32) >> 6;
pixel *dst = (pixel*)_dst;
+ dctcoef *block = (dctcoef*)_block;
+ int dc = (block[0] + 32) >> 6;
stride >>= sizeof(pixel)-1;
+ block[0] = 0;
for( j = 0; j < 4; j++ )
{
for( i = 0; i < 4; i++ )
@@ -149,10 +155,12 @@ void FUNCC(ff_h264_idct_dc_add)(uint8_t *_dst, int16_t *block, int stride){
}
}
-void FUNCC(ff_h264_idct8_dc_add)(uint8_t *_dst, int16_t *block, int stride){
+void FUNCC(ff_h264_idct8_dc_add)(uint8_t *_dst, int16_t *_block, int stride){
int i, j;
- int dc = (((dctcoef*)block)[0] + 32) >> 6;
pixel *dst = (pixel*)_dst;
+ dctcoef *block = (dctcoef*)_block;
+ int dc = (block[0] + 32) >> 6;
+ block[0] = 0;
stride >>= sizeof(pixel)-1;
for( j = 0; j < 8; j++ )
{