diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/faanidct.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/faanidct.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/contrib/ffmpeg/libavcodec/faanidct.c b/contrib/ffmpeg/libavcodec/faanidct.c deleted file mode 100644 index add40349a..000000000 --- a/contrib/ffmpeg/libavcodec/faanidct.c +++ /dev/null @@ -1,168 +0,0 @@ -/* - * Floating point AAN IDCT - * Copyright (c) 2008 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 - */ -#include "faanidct.h" - -/* To allow switching to double. */ -#define FLOAT float - -#define B0 1.0000000000000000000000 -#define B1 1.3870398453221474618216 // cos(pi*1/16)sqrt(2) -#define B2 1.3065629648763765278566 // cos(pi*2/16)sqrt(2) -#define B3 1.1758756024193587169745 // cos(pi*3/16)sqrt(2) -#define B4 1.0000000000000000000000 // cos(pi*4/16)sqrt(2) -#define B5 0.7856949583871021812779 // cos(pi*5/16)sqrt(2) -#define B6 0.5411961001461969843997 // cos(pi*6/16)sqrt(2) -#define B7 0.2758993792829430123360 // cos(pi*7/16)sqrt(2) - -#define A4 0.70710678118654752438 // cos(pi*4/16) -#define A2 0.92387953251128675613 // cos(pi*2/16) - -static const FLOAT prescale[64]={ -B0*B0/8, B0*B1/8, B0*B2/8, B0*B3/8, B0*B4/8, B0*B5/8, B0*B6/8, B0*B7/8, -B1*B0/8, B1*B1/8, B1*B2/8, B1*B3/8, B1*B4/8, B1*B5/8, B1*B6/8, B1*B7/8, -B2*B0/8, B2*B1/8, B2*B2/8, B2*B3/8, B2*B4/8, B2*B5/8, B2*B6/8, B2*B7/8, -B3*B0/8, B3*B1/8, B3*B2/8, B3*B3/8, B3*B4/8, B3*B5/8, B3*B6/8, B3*B7/8, -B4*B0/8, B4*B1/8, B4*B2/8, B4*B3/8, B4*B4/8, B4*B5/8, B4*B6/8, B4*B7/8, -B5*B0/8, B5*B1/8, B5*B2/8, B5*B3/8, B5*B4/8, B5*B5/8, B5*B6/8, B5*B7/8, -B6*B0/8, B6*B1/8, B6*B2/8, B6*B3/8, B6*B4/8, B6*B5/8, B6*B6/8, B6*B7/8, -B7*B0/8, B7*B1/8, B7*B2/8, B7*B3/8, B7*B4/8, B7*B5/8, B7*B6/8, B7*B7/8, -}; - -static inline void p8idct(DCTELEM data[64], FLOAT temp[64], uint8_t *dest, int stride, int x, int y, int type){ - int i; - FLOAT tmp0; - FLOAT s04, d04, s17, d17, s26, d26, s53, d53; - FLOAT os07, os16, os25, os34; - FLOAT od07, od16, od25, od34; - - for(i=0; i<y*8; i+=y){ - s17= temp[1*x + i] + temp[7*x + i]; - d17= temp[1*x + i] - temp[7*x + i]; - s53= temp[5*x + i] + temp[3*x + i]; - d53= temp[5*x + i] - temp[3*x + i]; - - od07= s17 + s53; - od25= (s17 - s53)*(2*A4); - -#if 0 //these 2 are equivalent - tmp0= (d17 + d53)*(2*A2); - od34= d17*( 2*B6) - tmp0; - od16= d53*(-2*B2) + tmp0; -#else - od34= d17*(2*(B6-A2)) - d53*(2*A2); - od16= d53*(2*(A2-B2)) + d17*(2*A2); -#endif - - od16 -= od07; - od25 -= od16; - od34 += od25; - - s26 = temp[2*x + i] + temp[6*x + i]; - d26 = temp[2*x + i] - temp[6*x + i]; - d26*= 2*A4; - d26-= s26; - - s04= temp[0*x + i] + temp[4*x + i]; - d04= temp[0*x + i] - temp[4*x + i]; - - os07= s04 + s26; - os34= s04 - s26; - os16= d04 + d26; - os25= d04 - d26; - - if(type==0){ - temp[0*x + i]= os07 + od07; - temp[7*x + i]= os07 - od07; - temp[1*x + i]= os16 + od16; - temp[6*x + i]= os16 - od16; - temp[2*x + i]= os25 + od25; - temp[5*x + i]= os25 - od25; - temp[3*x + i]= os34 - od34; - temp[4*x + i]= os34 + od34; - }else if(type==1){ - data[0*x + i]= lrintf(os07 + od07); - data[7*x + i]= lrintf(os07 - od07); - data[1*x + i]= lrintf(os16 + od16); - data[6*x + i]= lrintf(os16 - od16); - data[2*x + i]= lrintf(os25 + od25); - data[5*x + i]= lrintf(os25 - od25); - data[3*x + i]= lrintf(os34 - od34); - data[4*x + i]= lrintf(os34 + od34); - }else if(type==2){ - dest[0*stride + i]= av_clip_uint8(((int)dest[0*stride + i]) + lrintf(os07 + od07)); - dest[7*stride + i]= av_clip_uint8(((int)dest[7*stride + i]) + lrintf(os07 - od07)); - dest[1*stride + i]= av_clip_uint8(((int)dest[1*stride + i]) + lrintf(os16 + od16)); - dest[6*stride + i]= av_clip_uint8(((int)dest[6*stride + i]) + lrintf(os16 - od16)); - dest[2*stride + i]= av_clip_uint8(((int)dest[2*stride + i]) + lrintf(os25 + od25)); - dest[5*stride + i]= av_clip_uint8(((int)dest[5*stride + i]) + lrintf(os25 - od25)); - dest[3*stride + i]= av_clip_uint8(((int)dest[3*stride + i]) + lrintf(os34 - od34)); - dest[4*stride + i]= av_clip_uint8(((int)dest[4*stride + i]) + lrintf(os34 + od34)); - }else{ - dest[0*stride + i]= av_clip_uint8(lrintf(os07 + od07)); - dest[7*stride + i]= av_clip_uint8(lrintf(os07 - od07)); - dest[1*stride + i]= av_clip_uint8(lrintf(os16 + od16)); - dest[6*stride + i]= av_clip_uint8(lrintf(os16 - od16)); - dest[2*stride + i]= av_clip_uint8(lrintf(os25 + od25)); - dest[5*stride + i]= av_clip_uint8(lrintf(os25 - od25)); - dest[3*stride + i]= av_clip_uint8(lrintf(os34 - od34)); - dest[4*stride + i]= av_clip_uint8(lrintf(os34 + od34)); - } - } -} - -void ff_faanidct(DCTELEM block[64]){ - FLOAT temp[64]; - int i; - - emms_c(); - - for(i=0; i<64; i++) - temp[i] = block[i] * prescale[i]; - - p8idct(block, temp, NULL, 0, 1, 8, 0); - p8idct(block, temp, NULL, 0, 8, 1, 1); -} - -void ff_faanidct_add(uint8_t *dest, int line_size, DCTELEM block[64]){ - FLOAT temp[64]; - int i; - - emms_c(); - - for(i=0; i<64; i++) - temp[i] = block[i] * prescale[i]; - - p8idct(block, temp, NULL, 0, 1, 8, 0); - p8idct(NULL , temp, dest, line_size, 8, 1, 2); -} - -void ff_faanidct_put(uint8_t *dest, int line_size, DCTELEM block[64]){ - FLOAT temp[64]; - int i; - - emms_c(); - - for(i=0; i<64; i++) - temp[i] = block[i] * prescale[i]; - - p8idct(block, temp, NULL, 0, 1, 8, 0); - p8idct(NULL , temp, dest, line_size, 8, 1, 3); -} |