diff options
author | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
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committer | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
commit | 726a91b12a7524e45e7a901c9e4883af5b1bffe6 (patch) | |
tree | f5d25e3b2e84c92f4901280c73d5d3d7e6c3cd19 /src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264idct.c | |
parent | 02183f6e47ad4ea1057de9950482f291f2ae4290 (diff) |
Rename several directories to use MixedCase instead of lowercase.
They now mostly match the case used in #includes,
and they're consistent with the names of the .h files they contain.
git-svn-id: https://mpc-hc.svn.sourceforge.net/svnroot/mpc-hc/trunk@1648 10f7b99b-c216-0410-bff0-8a66a9350fd8
Diffstat (limited to 'src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264idct.c')
-rw-r--r-- | src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264idct.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264idct.c b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264idct.c new file mode 100644 index 000000000..7de56b241 --- /dev/null +++ b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264idct.c @@ -0,0 +1,218 @@ +/*
+ * H.264 IDCT
+ * Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file h264idct.c
+ * H.264 IDCT.
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#include "dsputil.h"
+
+static av_always_inline void idct_internal(uint8_t *dst, DCTELEM *block, int stride, int block_stride, int shift, int add){
+ int i;
+ uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+
+ block[0] += 1<<(shift-1);
+
+ for(i=0; i<4; i++){
+ const int z0= block[0 + block_stride*i] + block[2 + block_stride*i];
+ const int z1= block[0 + block_stride*i] - block[2 + block_stride*i];
+ const int z2= (block[1 + block_stride*i]>>1) - block[3 + block_stride*i];
+ const int z3= block[1 + block_stride*i] + (block[3 + block_stride*i]>>1);
+
+ block[0 + block_stride*i]= z0 + z3;
+ block[1 + block_stride*i]= z1 + z2;
+ block[2 + block_stride*i]= z1 - z2;
+ block[3 + block_stride*i]= z0 - z3;
+ }
+
+ for(i=0; i<4; i++){
+ const int z0= block[i + block_stride*0] + block[i + block_stride*2];
+ const int z1= block[i + block_stride*0] - block[i + block_stride*2];
+ const int z2= (block[i + block_stride*1]>>1) - block[i + block_stride*3];
+ const int z3= block[i + block_stride*1] + (block[i + block_stride*3]>>1);
+
+ dst[i + 0*stride]= cm[ add*dst[i + 0*stride] + ((z0 + z3) >> shift) ];
+ dst[i + 1*stride]= cm[ add*dst[i + 1*stride] + ((z1 + z2) >> shift) ];
+ dst[i + 2*stride]= cm[ add*dst[i + 2*stride] + ((z1 - z2) >> shift) ];
+ dst[i + 3*stride]= cm[ add*dst[i + 3*stride] + ((z0 - z3) >> shift) ];
+ }
+}
+
+void ff_h264_idct_add_c(uint8_t *dst, DCTELEM *block, int stride){
+ idct_internal(dst, block, stride, 4, 6, 1);
+}
+
+void ff_h264_lowres_idct_add_c(uint8_t *dst, int stride, DCTELEM *block){
+ idct_internal(dst, block, stride, 8, 3, 1);
+}
+
+void ff_h264_lowres_idct_put_c(uint8_t *dst, int stride, DCTELEM *block){
+ idct_internal(dst, block, stride, 8, 3, 0);
+}
+
+void ff_h264_idct8_add_c(uint8_t *dst, DCTELEM *block, int stride){
+ int i;
+ uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+
+ block[0] += 32;
+
+ for( i = 0; i < 8; i++ )
+ {
+ const int a0 = block[0+i*8] + block[4+i*8];
+ const int a2 = block[0+i*8] - block[4+i*8];
+ const int a4 = (block[2+i*8]>>1) - block[6+i*8];
+ const int a6 = (block[6+i*8]>>1) + block[2+i*8];
+
+ const int b0 = a0 + a6;
+ const int b2 = a2 + a4;
+ const int b4 = a2 - a4;
+ const int b6 = a0 - a6;
+
+ const int a1 = -block[3+i*8] + block[5+i*8] - block[7+i*8] - (block[7+i*8]>>1);
+ const int a3 = block[1+i*8] + block[7+i*8] - block[3+i*8] - (block[3+i*8]>>1);
+ const int a5 = -block[1+i*8] + block[7+i*8] + block[5+i*8] + (block[5+i*8]>>1);
+ const int a7 = block[3+i*8] + block[5+i*8] + block[1+i*8] + (block[1+i*8]>>1);
+
+ const int b1 = (a7>>2) + a1;
+ const int b3 = a3 + (a5>>2);
+ const int b5 = (a3>>2) - a5;
+ const int b7 = a7 - (a1>>2);
+
+ block[0+i*8] = b0 + b7;
+ block[7+i*8] = b0 - b7;
+ block[1+i*8] = b2 + b5;
+ block[6+i*8] = b2 - b5;
+ block[2+i*8] = b4 + b3;
+ block[5+i*8] = b4 - b3;
+ block[3+i*8] = b6 + b1;
+ block[4+i*8] = b6 - b1;
+ }
+ for( i = 0; i < 8; i++ )
+ {
+ const int a0 = block[i+0*8] + block[i+4*8];
+ const int a2 = block[i+0*8] - block[i+4*8];
+ const int a4 = (block[i+2*8]>>1) - block[i+6*8];
+ const int a6 = (block[i+6*8]>>1) + block[i+2*8];
+
+ const int b0 = a0 + a6;
+ const int b2 = a2 + a4;
+ const int b4 = a2 - a4;
+ const int b6 = a0 - a6;
+
+ const int a1 = -block[i+3*8] + block[i+5*8] - block[i+7*8] - (block[i+7*8]>>1);
+ const int a3 = block[i+1*8] + block[i+7*8] - block[i+3*8] - (block[i+3*8]>>1);
+ const int a5 = -block[i+1*8] + block[i+7*8] + block[i+5*8] + (block[i+5*8]>>1);
+ const int a7 = block[i+3*8] + block[i+5*8] + block[i+1*8] + (block[i+1*8]>>1);
+
+ const int b1 = (a7>>2) + a1;
+ const int b3 = a3 + (a5>>2);
+ const int b5 = (a3>>2) - a5;
+ const int b7 = a7 - (a1>>2);
+
+ dst[i + 0*stride] = cm[ dst[i + 0*stride] + ((b0 + b7) >> 6) ];
+ dst[i + 1*stride] = cm[ dst[i + 1*stride] + ((b2 + b5) >> 6) ];
+ dst[i + 2*stride] = cm[ dst[i + 2*stride] + ((b4 + b3) >> 6) ];
+ dst[i + 3*stride] = cm[ dst[i + 3*stride] + ((b6 + b1) >> 6) ];
+ dst[i + 4*stride] = cm[ dst[i + 4*stride] + ((b6 - b1) >> 6) ];
+ dst[i + 5*stride] = cm[ dst[i + 5*stride] + ((b4 - b3) >> 6) ];
+ dst[i + 6*stride] = cm[ dst[i + 6*stride] + ((b2 - b5) >> 6) ];
+ dst[i + 7*stride] = cm[ dst[i + 7*stride] + ((b0 - b7) >> 6) ];
+ }
+}
+
+// assumes all AC coefs are 0
+void ff_h264_idct_dc_add_c(uint8_t *dst, DCTELEM *block, int stride){
+ int i, j;
+ uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+ int dc = (block[0] + 32) >> 6;
+ for( j = 0; j < 4; j++ )
+ {
+ for( i = 0; i < 4; i++ )
+ dst[i] = cm[ dst[i] + dc ];
+ dst += stride;
+ }
+}
+
+void ff_h264_idct8_dc_add_c(uint8_t *dst, DCTELEM *block, int stride){
+ int i, j;
+ uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+ int dc = (block[0] + 32) >> 6;
+ for( j = 0; j < 8; j++ )
+ {
+ for( i = 0; i < 8; i++ )
+ dst[i] = cm[ dst[i] + dc ];
+ dst += stride;
+ }
+}
+
+//FIXME this table is a duplicate from h264data.h, and will be removed once the tables from, h264 have been split
+static const uint8_t scan8[16 + 2*4]={
+ 4+1*8, 5+1*8, 4+2*8, 5+2*8,
+ 6+1*8, 7+1*8, 6+2*8, 7+2*8,
+ 4+3*8, 5+3*8, 4+4*8, 5+4*8,
+ 6+3*8, 7+3*8, 6+4*8, 7+4*8,
+ 1+1*8, 2+1*8,
+ 1+2*8, 2+2*8,
+ 1+4*8, 2+4*8,
+ 1+5*8, 2+5*8,
+};
+
+void ff_h264_idct_add16_c(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
+ int i;
+ for(i=0; i<16; i++){
+ int nnz = nnzc[ scan8[i] ];
+ if(nnz){
+ if(nnz==1 && block[i*16]) ff_h264_idct_dc_add_c(dst + block_offset[i], block + i*16, stride);
+ else idct_internal (dst + block_offset[i], block + i*16, stride, 4, 6, 1);
+ }
+ }
+}
+
+void ff_h264_idct_add16intra_c(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
+ int i;
+ for(i=0; i<16; i++){
+ if(nnzc[ scan8[i] ]) idct_internal (dst + block_offset[i], block + i*16, stride, 4, 6, 1);
+ else if(block[i*16]) ff_h264_idct_dc_add_c(dst + block_offset[i], block + i*16, stride);
+ }
+}
+
+void ff_h264_idct8_add4_c(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
+ int i;
+ for(i=0; i<16; i+=4){
+ int nnz = nnzc[ scan8[i] ];
+ if(nnz){
+ if(nnz==1 && block[i*16]) ff_h264_idct8_dc_add_c(dst + block_offset[i], block + i*16, stride);
+ else ff_h264_idct8_add_c (dst + block_offset[i], block + i*16, stride);
+ }
+ }
+}
+
+void ff_h264_idct_add8_c(uint8_t **dest, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
+ int i;
+ for(i=16; i<16+8; i++){
+ if(nnzc[ scan8[i] ])
+ ff_h264_idct_add_c (dest[(i&4)>>2] + block_offset[i], block + i*16, stride);
+ else if(block[i*16])
+ ff_h264_idct_dc_add_c(dest[(i&4)>>2] + block_offset[i], block + i*16, stride);
+ }
+}
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