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authorJason Garrett-Glaser <darkshikari@gmail.com>2011-01-15 00:41:18 +0000
committerJason Garrett-Glaser <darkshikari@gmail.com>2011-01-15 00:41:18 +0000
commit290fabc684244b86d47527008020b0b2eb62f836 (patch)
tree40d1f97a726923a437c726c1e6d64869ec4746dc /libavcodec/svq3.c
parenta51c71bb54c53ccb22e7972f8f60819f7f4f2c9f (diff)
downloadffmpeg-290fabc684244b86d47527008020b0b2eb62f836.tar.gz
Port SVQ3 to use the new mb_luma_dc method of storing luma DC coefficients.
Doesn't help speed as there isn't an asm implementation yet, but consistency is a good thing. Originally committed as revision 26348 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/svq3.c')
-rw-r--r--libavcodec/svq3.c44
1 files changed, 21 insertions, 23 deletions
diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 4a4a1c52cd..a52744228e 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -125,22 +125,18 @@ static const uint32_t svq3_dequant_coeff[32] = {
61694, 68745, 77615, 89113,100253,109366,126635,141533
};
-
-void ff_svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp)
-{
+void ff_svq3_luma_dc_dequant_idct_c(DCTELEM *output, DCTELEM *input, int qp){
const int qmul = svq3_dequant_coeff[qp];
#define stride 16
int i;
int temp[16];
- static const int x_offset[4] = {0, 1*stride, 4* stride, 5*stride};
- static const int y_offset[4] = {0, 2*stride, 8* stride, 10*stride};
+ static const uint8_t x_offset[4]={0, 1*stride, 4*stride, 5*stride};
- for (i = 0; i < 4; i++){
- const int offset = y_offset[i];
- const int z0 = 13*(block[offset+stride*0] + block[offset+stride*4]);
- const int z1 = 13*(block[offset+stride*0] - block[offset+stride*4]);
- const int z2 = 7* block[offset+stride*1] - 17*block[offset+stride*5];
- const int z3 = 17* block[offset+stride*1] + 7*block[offset+stride*5];
+ for(i=0; i<4; i++){
+ const int z0 = 13*(input[4*i+0] + input[4*i+2]);
+ const int z1 = 13*(input[4*i+0] - input[4*i+2]);
+ const int z2 = 7* input[4*i+1] - 17*input[4*i+3];
+ const int z3 = 17* input[4*i+1] + 7*input[4*i+3];
temp[4*i+0] = z0+z3;
temp[4*i+1] = z1+z2;
@@ -148,17 +144,17 @@ void ff_svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp)
temp[4*i+3] = z0-z3;
}
- for (i = 0; i < 4; i++){
- const int offset = x_offset[i];
- const int z0 = 13*(temp[4*0+i] + temp[4*2+i]);
- const int z1 = 13*(temp[4*0+i] - temp[4*2+i]);
- const int z2 = 7* temp[4*1+i] - 17*temp[4*3+i];
- const int z3 = 17* temp[4*1+i] + 7*temp[4*3+i];
-
- block[stride*0 +offset] = ((z0 + z3)*qmul + 0x80000) >> 20;
- block[stride*2 +offset] = ((z1 + z2)*qmul + 0x80000) >> 20;
- block[stride*8 +offset] = ((z1 - z2)*qmul + 0x80000) >> 20;
- block[stride*10+offset] = ((z0 - z3)*qmul + 0x80000) >> 20;
+ for(i=0; i<4; i++){
+ const int offset= x_offset[i];
+ const int z0= 13*(temp[4*0+i] + temp[4*2+i]);
+ const int z1= 13*(temp[4*0+i] - temp[4*2+i]);
+ const int z2= 7* temp[4*1+i] - 17*temp[4*3+i];
+ const int z3= 17* temp[4*1+i] + 7*temp[4*3+i];
+
+ output[stride* 0+offset] = ((z0 + z3)*qmul + 0x80000) >> 20;
+ output[stride* 2+offset] = ((z1 + z2)*qmul + 0x80000) >> 20;
+ output[stride* 8+offset] = ((z1 - z2)*qmul + 0x80000) >> 20;
+ output[stride*10+offset] = ((z0 - z3)*qmul + 0x80000) >> 20;
}
}
#undef stride
@@ -648,7 +644,9 @@ static int svq3_decode_mb(H264Context *h, unsigned int mb_type)
}
}
if (IS_INTRA16x16(mb_type)) {
- if (svq3_decode_block(&s->gb, h->mb, 0, 0)){
+ AV_ZERO128(h->mb_luma_dc+0);
+ AV_ZERO128(h->mb_luma_dc+8);
+ if (svq3_decode_block(&s->gb, h->mb_luma_dc, 0, 1)){
av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding intra luma dc\n");
return -1;
}