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/* |
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* H.264 IDCT |
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* Copyright (c) 2004-2011 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* H.264 IDCT. |
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* @author Michael Niedermayer <michaelni@gmx.at> |
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*/ |
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#include "bit_depth_template.c" |
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#include "libavutil/common.h" |
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#include "h264dec.h" |
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#include "h264idct.h" |
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104103628 |
void FUNCC(ff_h264_idct_add)(uint8_t *_dst, int16_t *_block, int stride) |
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{ |
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int i; |
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104103628 |
pixel *dst = (pixel*)_dst; |
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104103628 |
dctcoef *block = (dctcoef*)_block; |
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104103628 |
stride >>= sizeof(pixel)-1; |
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104103628 |
block[0] += 1 << 5; |
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✓✓ |
520518140 |
for(i=0; i<4; i++){ |
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416414512 |
const SUINT z0= block[i + 4*0] + (unsigned)block[i + 4*2]; |
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416414512 |
const SUINT z1= block[i + 4*0] - (unsigned)block[i + 4*2]; |
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416414512 |
const SUINT z2= (block[i + 4*1]>>1) - (unsigned)block[i + 4*3]; |
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416414512 |
const SUINT z3= block[i + 4*1] + (unsigned)(block[i + 4*3]>>1); |
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416414512 |
block[i + 4*0]= z0 + z3; |
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416414512 |
block[i + 4*1]= z1 + z2; |
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416414512 |
block[i + 4*2]= z1 - z2; |
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416414512 |
block[i + 4*3]= z0 - z3; |
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} |
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✓✓ |
520518140 |
for(i=0; i<4; i++){ |
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416414512 |
const SUINT z0= block[0 + 4*i] + (SUINT)block[2 + 4*i]; |
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416414512 |
const SUINT z1= block[0 + 4*i] - (SUINT)block[2 + 4*i]; |
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416414512 |
const SUINT z2= (block[1 + 4*i]>>1) - (SUINT)block[3 + 4*i]; |
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416414512 |
const SUINT z3= block[1 + 4*i] + (SUINT)(block[3 + 4*i]>>1); |
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416414512 |
dst[i + 0*stride]= av_clip_pixel(dst[i + 0*stride] + ((int)(z0 + z3) >> 6)); |
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416414512 |
dst[i + 1*stride]= av_clip_pixel(dst[i + 1*stride] + ((int)(z1 + z2) >> 6)); |
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416414512 |
dst[i + 2*stride]= av_clip_pixel(dst[i + 2*stride] + ((int)(z1 - z2) >> 6)); |
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416414512 |
dst[i + 3*stride]= av_clip_pixel(dst[i + 3*stride] + ((int)(z0 - z3) >> 6)); |
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} |
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104103628 |
memset(block, 0, 16 * sizeof(dctcoef)); |
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} |
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13272096 |
void FUNCC(ff_h264_idct8_add)(uint8_t *_dst, int16_t *_block, int stride){ |
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int i; |
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13272096 |
pixel *dst = (pixel*)_dst; |
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13272096 |
dctcoef *block = (dctcoef*)_block; |
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13272096 |
stride >>= sizeof(pixel)-1; |
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13272096 |
block[0] += 32; |
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✓✓ |
119448864 |
for( i = 0; i < 8; i++ ) |
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{ |
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106176768 |
const unsigned int a0 = block[i+0*8] + (unsigned)block[i+4*8]; |
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106176768 |
const unsigned int a2 = block[i+0*8] - (unsigned)block[i+4*8]; |
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106176768 |
const unsigned int a4 = (block[i+2*8]>>1) - (unsigned)block[i+6*8]; |
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106176768 |
const unsigned int a6 = (block[i+6*8]>>1) + (unsigned)block[i+2*8]; |
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106176768 |
const unsigned int b0 = a0 + a6; |
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106176768 |
const unsigned int b2 = a2 + a4; |
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106176768 |
const unsigned int b4 = a2 - a4; |
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106176768 |
const unsigned int b6 = a0 - a6; |
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106176768 |
const int a1 = -block[i+3*8] + (unsigned)block[i+5*8] - block[i+7*8] - (block[i+7*8]>>1); |
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106176768 |
const int a3 = block[i+1*8] + (unsigned)block[i+7*8] - block[i+3*8] - (block[i+3*8]>>1); |
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106176768 |
const int a5 = -block[i+1*8] + (unsigned)block[i+7*8] + block[i+5*8] + (block[i+5*8]>>1); |
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106176768 |
const int a7 = block[i+3*8] + (unsigned)block[i+5*8] + block[i+1*8] + (block[i+1*8]>>1); |
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106176768 |
const int b1 = (a7>>2) + (unsigned)a1; |
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106176768 |
const int b3 = (unsigned)a3 + (a5>>2); |
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106176768 |
const int b5 = (a3>>2) - (unsigned)a5; |
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106176768 |
const int b7 = (unsigned)a7 - (a1>>2); |
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106176768 |
block[i+0*8] = b0 + b7; |
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106176768 |
block[i+7*8] = b0 - b7; |
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106176768 |
block[i+1*8] = b2 + b5; |
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106176768 |
block[i+6*8] = b2 - b5; |
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106176768 |
block[i+2*8] = b4 + b3; |
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106176768 |
block[i+5*8] = b4 - b3; |
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106176768 |
block[i+3*8] = b6 + b1; |
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106176768 |
block[i+4*8] = b6 - b1; |
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} |
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✓✓ |
119448864 |
for( i = 0; i < 8; i++ ) |
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{ |
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106176768 |
const unsigned a0 = block[0+i*8] + (unsigned)block[4+i*8]; |
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106176768 |
const unsigned a2 = block[0+i*8] - (unsigned)block[4+i*8]; |
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106176768 |
const unsigned a4 = (block[2+i*8]>>1) - (unsigned)block[6+i*8]; |
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106176768 |
const unsigned a6 = (block[6+i*8]>>1) + (unsigned)block[2+i*8]; |
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106176768 |
const unsigned b0 = a0 + a6; |
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106176768 |
const unsigned b2 = a2 + a4; |
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106176768 |
const unsigned b4 = a2 - a4; |
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106176768 |
const unsigned b6 = a0 - a6; |
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106176768 |
const int a1 = -(unsigned)block[3+i*8] + block[5+i*8] - block[7+i*8] - (block[7+i*8]>>1); |
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106176768 |
const int a3 = (unsigned)block[1+i*8] + block[7+i*8] - block[3+i*8] - (block[3+i*8]>>1); |
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106176768 |
const int a5 = -(unsigned)block[1+i*8] + block[7+i*8] + block[5+i*8] + (block[5+i*8]>>1); |
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106176768 |
const int a7 = (unsigned)block[3+i*8] + block[5+i*8] + block[1+i*8] + (block[1+i*8]>>1); |
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106176768 |
const unsigned b1 = (a7>>2) + (unsigned)a1; |
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106176768 |
const unsigned b3 = (unsigned)a3 + (a5>>2); |
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106176768 |
const unsigned b5 = (a3>>2) - (unsigned)a5; |
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106176768 |
const unsigned b7 = (unsigned)a7 - (a1>>2); |
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106176768 |
dst[i + 0*stride] = av_clip_pixel( dst[i + 0*stride] + ((int)(b0 + b7) >> 6) ); |
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106176768 |
dst[i + 1*stride] = av_clip_pixel( dst[i + 1*stride] + ((int)(b2 + b5) >> 6) ); |
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106176768 |
dst[i + 2*stride] = av_clip_pixel( dst[i + 2*stride] + ((int)(b4 + b3) >> 6) ); |
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106176768 |
dst[i + 3*stride] = av_clip_pixel( dst[i + 3*stride] + ((int)(b6 + b1) >> 6) ); |
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106176768 |
dst[i + 4*stride] = av_clip_pixel( dst[i + 4*stride] + ((int)(b6 - b1) >> 6) ); |
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106176768 |
dst[i + 5*stride] = av_clip_pixel( dst[i + 5*stride] + ((int)(b4 - b3) >> 6) ); |
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106176768 |
dst[i + 6*stride] = av_clip_pixel( dst[i + 6*stride] + ((int)(b2 - b5) >> 6) ); |
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106176768 |
dst[i + 7*stride] = av_clip_pixel( dst[i + 7*stride] + ((int)(b0 - b7) >> 6) ); |
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} |
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13272096 |
memset(block, 0, 64 * sizeof(dctcoef)); |
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} |
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// assumes all AC coefs are 0 |
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56308154 |
void FUNCC(ff_h264_idct_dc_add)(uint8_t *_dst, int16_t *_block, int stride){ |
145 |
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int i, j; |
146 |
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56308154 |
pixel *dst = (pixel*)_dst; |
147 |
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56308154 |
dctcoef *block = (dctcoef*)_block; |
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56308154 |
int dc = (block[0] + 32) >> 6; |
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56308154 |
stride /= sizeof(pixel); |
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56308154 |
block[0] = 0; |
151 |
✓✓ |
281540770 |
for( j = 0; j < 4; j++ ) |
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{ |
153 |
✓✓ |
1126163080 |
for( i = 0; i < 4; i++ ) |
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900930464 |
dst[i] = av_clip_pixel( dst[i] + dc ); |
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225232616 |
dst += stride; |
156 |
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} |
157 |
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} |
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1190710 |
void FUNCC(ff_h264_idct8_dc_add)(uint8_t *_dst, int16_t *_block, int stride){ |
160 |
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int i, j; |
161 |
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1190710 |
pixel *dst = (pixel*)_dst; |
162 |
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1190710 |
dctcoef *block = (dctcoef*)_block; |
163 |
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1190710 |
int dc = (block[0] + 32) >> 6; |
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1190710 |
block[0] = 0; |
165 |
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1190710 |
stride /= sizeof(pixel); |
166 |
✓✓ |
10716390 |
for( j = 0; j < 8; j++ ) |
167 |
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{ |
168 |
✓✓ |
85731120 |
for( i = 0; i < 8; i++ ) |
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76205440 |
dst[i] = av_clip_pixel( dst[i] + dc ); |
170 |
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9525680 |
dst += stride; |
171 |
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} |
172 |
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} |
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174 |
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8988780 |
void FUNCC(ff_h264_idct_add16)(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){ |
175 |
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int i; |
176 |
✓✓ |
152809260 |
for(i=0; i<16; i++){ |
177 |
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143820480 |
int nnz = nnzc[ scan8[i] ]; |
178 |
✓✓ |
143820480 |
if(nnz){ |
179 |
✓✓✓✓
|
54571774 |
if(nnz==1 && ((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride); |
180 |
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45666086 |
else FUNCC(ff_h264_idct_add )(dst + block_offset[i], block + i*16*sizeof(pixel), stride); |
181 |
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} |
182 |
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} |
183 |
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} |
184 |
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185 |
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1689148 |
void FUNCC(ff_h264_idct_add16intra)(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){ |
186 |
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int i; |
187 |
✓✓ |
28715516 |
for(i=0; i<16; i++){ |
188 |
✓✓ |
27026368 |
if(nnzc[ scan8[i] ]) FUNCC(ff_h264_idct_add )(dst + block_offset[i], block + i*16*sizeof(pixel), stride); |
189 |
✓✓ |
19693814 |
else if(((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride); |
190 |
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} |
191 |
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} |
192 |
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193 |
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1696090 |
void FUNCC(ff_h264_idct8_add4)(uint8_t *dst, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){ |
194 |
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int i; |
195 |
✓✓ |
8480450 |
for(i=0; i<16; i+=4){ |
196 |
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6784360 |
int nnz = nnzc[ scan8[i] ]; |
197 |
✓✓ |
6784360 |
if(nnz){ |
198 |
✓✓✓✓
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4366042 |
if(nnz==1 && ((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct8_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride); |
199 |
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3659796 |
else FUNCC(ff_h264_idct8_add )(dst + block_offset[i], block + i*16*sizeof(pixel), stride); |
200 |
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} |
201 |
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} |
202 |
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} |
203 |
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204 |
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8519042 |
void FUNCC(ff_h264_idct_add8)(uint8_t **dest, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){ |
205 |
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int i, j; |
206 |
✓✓ |
25557126 |
for(j=1; j<3; j++){ |
207 |
✓✓ |
85190420 |
for(i=j*16; i<j*16+4; i++){ |
208 |
✓✓ |
68152336 |
if(nnzc[ scan8[i] ]) |
209 |
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15978338 |
FUNCC(ff_h264_idct_add )(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride); |
210 |
✓✓ |
52173998 |
else if(((dctcoef*)block)[i*16]) |
211 |
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24445688 |
FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride); |
212 |
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} |
213 |
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} |
214 |
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} |
215 |
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216 |
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1350636 |
void FUNCC(ff_h264_idct_add8_422)(uint8_t **dest, const int *block_offset, int16_t *block, int stride, const uint8_t nnzc[15*8]){ |
217 |
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int i, j; |
218 |
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|
219 |
✓✓ |
4051908 |
for(j=1; j<3; j++){ |
220 |
✓✓ |
13506360 |
for(i=j*16; i<j*16+4; i++){ |
221 |
✓✓ |
10805088 |
if(nnzc[ scan8[i] ]) |
222 |
|
3641714 |
FUNCC(ff_h264_idct_add )(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride); |
223 |
✓✓ |
7163374 |
else if(((dctcoef*)block)[i*16]) |
224 |
|
4581790 |
FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride); |
225 |
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} |
226 |
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} |
227 |
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|
228 |
✓✓ |
4051908 |
for(j=1; j<3; j++){ |
229 |
✓✓ |
13506360 |
for(i=j*16+4; i<j*16+8; i++){ |
230 |
✓✓ |
10805088 |
if(nnzc[ scan8[i+4] ]) |
231 |
|
3691780 |
FUNCC(ff_h264_idct_add )(dest[j-1] + block_offset[i+4], block + i*16*sizeof(pixel), stride); |
232 |
✓✓ |
7113308 |
else if(((dctcoef*)block)[i*16]) |
233 |
|
4646866 |
FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i+4], block + i*16*sizeof(pixel), stride); |
234 |
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} |
235 |
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} |
236 |
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} |
237 |
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238 |
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/** |
239 |
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* IDCT transforms the 16 dc values and dequantizes them. |
240 |
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* @param qmul quantization parameter |
241 |
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*/ |
242 |
|
1145660 |
void FUNCC(ff_h264_luma_dc_dequant_idct)(int16_t *_output, int16_t *_input, int qmul){ |
243 |
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#define stride 16 |
244 |
|
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int i; |
245 |
|
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int temp[16]; |
246 |
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static const uint8_t x_offset[4]={0, 2*stride, 8*stride, 10*stride}; |
247 |
|
1145660 |
dctcoef *input = (dctcoef*)_input; |
248 |
|
1145660 |
dctcoef *output = (dctcoef*)_output; |
249 |
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|
250 |
✓✓ |
5728300 |
for(i=0; i<4; i++){ |
251 |
|
4582640 |
const int z0= input[4*i+0] + input[4*i+1]; |
252 |
|
4582640 |
const int z1= input[4*i+0] - input[4*i+1]; |
253 |
|
4582640 |
const int z2= input[4*i+2] - input[4*i+3]; |
254 |
|
4582640 |
const int z3= input[4*i+2] + input[4*i+3]; |
255 |
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|
256 |
|
4582640 |
temp[4*i+0]= z0+z3; |
257 |
|
4582640 |
temp[4*i+1]= z0-z3; |
258 |
|
4582640 |
temp[4*i+2]= z1-z2; |
259 |
|
4582640 |
temp[4*i+3]= z1+z2; |
260 |
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} |
261 |
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|
262 |
✓✓ |
5728300 |
for(i=0; i<4; i++){ |
263 |
|
4582640 |
const int offset= x_offset[i]; |
264 |
|
4582640 |
const SUINT z0= temp[4*0+i] + temp[4*2+i]; |
265 |
|
4582640 |
const SUINT z1= temp[4*0+i] - temp[4*2+i]; |
266 |
|
4582640 |
const SUINT z2= temp[4*1+i] - temp[4*3+i]; |
267 |
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4582640 |
const SUINT z3= temp[4*1+i] + temp[4*3+i]; |
268 |
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|
269 |
|
4582640 |
output[stride* 0+offset]= (int)((z0 + z3)*qmul + 128 ) >> 8; |
270 |
|
4582640 |
output[stride* 1+offset]= (int)((z1 + z2)*qmul + 128 ) >> 8; |
271 |
|
4582640 |
output[stride* 4+offset]= (int)((z1 - z2)*qmul + 128 ) >> 8; |
272 |
|
4582640 |
output[stride* 5+offset]= (int)((z0 - z3)*qmul + 128 ) >> 8; |
273 |
|
|
} |
274 |
|
|
#undef stride |
275 |
|
|
} |
276 |
|
|
|
277 |
|
2252062 |
void FUNCC(ff_h264_chroma422_dc_dequant_idct)(int16_t *_block, int qmul){ |
278 |
|
2252062 |
const int stride= 16*2; |
279 |
|
2252062 |
const int xStride= 16; |
280 |
|
|
int i; |
281 |
|
|
unsigned temp[8]; |
282 |
|
|
static const uint8_t x_offset[2]={0, 16}; |
283 |
|
2252062 |
dctcoef *block = (dctcoef*)_block; |
284 |
|
|
|
285 |
✓✓ |
11260310 |
for(i=0; i<4; i++){ |
286 |
|
9008248 |
temp[2*i+0] = block[stride*i + xStride*0] + (unsigned)block[stride*i + xStride*1]; |
287 |
|
9008248 |
temp[2*i+1] = block[stride*i + xStride*0] - (unsigned)block[stride*i + xStride*1]; |
288 |
|
|
} |
289 |
|
|
|
290 |
✓✓ |
6756186 |
for(i=0; i<2; i++){ |
291 |
|
4504124 |
const int offset= x_offset[i]; |
292 |
|
4504124 |
const SUINT z0= temp[2*0+i] + temp[2*2+i]; |
293 |
|
4504124 |
const SUINT z1= temp[2*0+i] - temp[2*2+i]; |
294 |
|
4504124 |
const SUINT z2= temp[2*1+i] - temp[2*3+i]; |
295 |
|
4504124 |
const SUINT z3= temp[2*1+i] + temp[2*3+i]; |
296 |
|
|
|
297 |
|
4504124 |
block[stride*0+offset]= (int)((z0 + z3)*qmul + 128) >> 8; |
298 |
|
4504124 |
block[stride*1+offset]= (int)((z1 + z2)*qmul + 128) >> 8; |
299 |
|
4504124 |
block[stride*2+offset]= (int)((z1 - z2)*qmul + 128) >> 8; |
300 |
|
4504124 |
block[stride*3+offset]= (int)((z0 - z3)*qmul + 128) >> 8; |
301 |
|
|
} |
302 |
|
|
} |
303 |
|
|
|
304 |
|
12086092 |
void FUNCC(ff_h264_chroma_dc_dequant_idct)(int16_t *_block, int qmul){ |
305 |
|
12086092 |
const int stride= 16*2; |
306 |
|
12086092 |
const int xStride= 16; |
307 |
|
|
SUINT a,b,c,d,e; |
308 |
|
12086092 |
dctcoef *block = (dctcoef*)_block; |
309 |
|
|
|
310 |
|
12086092 |
a= block[stride*0 + xStride*0]; |
311 |
|
12086092 |
b= block[stride*0 + xStride*1]; |
312 |
|
12086092 |
c= block[stride*1 + xStride*0]; |
313 |
|
12086092 |
d= block[stride*1 + xStride*1]; |
314 |
|
|
|
315 |
|
12086092 |
e= a-b; |
316 |
|
12086092 |
a= a+b; |
317 |
|
12086092 |
b= c-d; |
318 |
|
12086092 |
c= c+d; |
319 |
|
|
|
320 |
|
12086092 |
block[stride*0 + xStride*0]= (int)((a+c)*qmul) >> 7; |
321 |
|
12086092 |
block[stride*0 + xStride*1]= (int)((e+b)*qmul) >> 7; |
322 |
|
12086092 |
block[stride*1 + xStride*0]= (int)((a-c)*qmul) >> 7; |
323 |
|
12086092 |
block[stride*1 + xStride*1]= (int)((e-b)*qmul) >> 7; |
324 |
|
|
} |