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Diffstat (limited to 'contrib/ffmpeg/libavcodec/faandct.c')
-rw-r--r--contrib/ffmpeg/libavcodec/faandct.c220
1 files changed, 0 insertions, 220 deletions
diff --git a/contrib/ffmpeg/libavcodec/faandct.c b/contrib/ffmpeg/libavcodec/faandct.c
deleted file mode 100644
index 6f73ee5e9..000000000
--- a/contrib/ffmpeg/libavcodec/faandct.c
+++ /dev/null
@@ -1,220 +0,0 @@
-/*
- * Floating point AAN DCT
- * Copyright (c) 2003 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
- *
- * this implementation is based upon the IJG integer AAN DCT (see jfdctfst.c)
- */
-
-/**
- * @file faandct.c
- * @brief
- * Floating point AAN DCT
- * @author Michael Niedermayer <michaelni@gmx.at>
- */
-
-#include "dsputil.h"
-#include "faandct.h"
-
-#define FLOAT float
-#ifdef FAAN_POSTSCALE
-# define SCALE(x) postscale[x]
-#else
-# define SCALE(x) 1
-#endif
-
-//numbers generated by simple c code (not as accurate as they could be)
-/*
-for(i=0; i<8; i++){
- printf("#define B%d %1.20llf\n", i, (long double)1.0/(cosl(i*acosl(-1.0)/(long double)16.0)*sqrtl(2)));
-}
-*/
-#define B0 1.00000000000000000000
-#define B1 0.72095982200694791383 // (cos(pi*1/16)sqrt(2))^-1
-#define B2 0.76536686473017954350 // (cos(pi*2/16)sqrt(2))^-1
-#define B3 0.85043009476725644878 // (cos(pi*3/16)sqrt(2))^-1
-#define B4 1.00000000000000000000 // (cos(pi*4/16)sqrt(2))^-1
-#define B5 1.27275858057283393842 // (cos(pi*5/16)sqrt(2))^-1
-#define B6 1.84775906502257351242 // (cos(pi*6/16)sqrt(2))^-1
-#define B7 3.62450978541155137218 // (cos(pi*7/16)sqrt(2))^-1
-
-
-#define A1 0.70710678118654752438 // cos(pi*4/16)
-#define A2 0.54119610014619698435 // cos(pi*6/16)sqrt(2)
-#define A5 0.38268343236508977170 // cos(pi*6/16)
-#define A4 1.30656296487637652774 // cos(pi*2/16)sqrt(2)
-
-static FLOAT postscale[64]={
-B0*B0, B0*B1, B0*B2, B0*B3, B0*B4, B0*B5, B0*B6, B0*B7,
-B1*B0, B1*B1, B1*B2, B1*B3, B1*B4, B1*B5, B1*B6, B1*B7,
-B2*B0, B2*B1, B2*B2, B2*B3, B2*B4, B2*B5, B2*B6, B2*B7,
-B3*B0, B3*B1, B3*B2, B3*B3, B3*B4, B3*B5, B3*B6, B3*B7,
-B4*B0, B4*B1, B4*B2, B4*B3, B4*B4, B4*B5, B4*B6, B4*B7,
-B5*B0, B5*B1, B5*B2, B5*B3, B5*B4, B5*B5, B5*B6, B5*B7,
-B6*B0, B6*B1, B6*B2, B6*B3, B6*B4, B6*B5, B6*B6, B6*B7,
-B7*B0, B7*B1, B7*B2, B7*B3, B7*B4, B7*B5, B7*B6, B7*B7,
-};
-
-static av_always_inline void row_fdct(FLOAT temp[64], DCTELEM * data)
-{
- FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
- FLOAT tmp10, tmp11, tmp12, tmp13;
- FLOAT z1, z2, z3, z4, z5, z11, z13;
- int i;
-
- for (i=0; i<8*8; i+=8) {
- tmp0= data[0 + i] + data[7 + i];
- tmp7= data[0 + i] - data[7 + i];
- tmp1= data[1 + i] + data[6 + i];
- tmp6= data[1 + i] - data[6 + i];
- tmp2= data[2 + i] + data[5 + i];
- tmp5= data[2 + i] - data[5 + i];
- tmp3= data[3 + i] + data[4 + i];
- tmp4= data[3 + i] - data[4 + i];
-
- tmp10= tmp0 + tmp3;
- tmp13= tmp0 - tmp3;
- tmp11= tmp1 + tmp2;
- tmp12= tmp1 - tmp2;
-
- temp[0 + i]= tmp10 + tmp11;
- temp[4 + i]= tmp10 - tmp11;
-
- z1= (tmp12 + tmp13)*A1;
- temp[2 + i]= tmp13 + z1;
- temp[6 + i]= tmp13 - z1;
-
- tmp10= tmp4 + tmp5;
- tmp11= tmp5 + tmp6;
- tmp12= tmp6 + tmp7;
-
- z5= (tmp10 - tmp12) * A5;
- z2= tmp10*A2 + z5;
- z4= tmp12*A4 + z5;
- z3= tmp11*A1;
-
- z11= tmp7 + z3;
- z13= tmp7 - z3;
-
- temp[5 + i]= z13 + z2;
- temp[3 + i]= z13 - z2;
- temp[1 + i]= z11 + z4;
- temp[7 + i]= z11 - z4;
- }
-}
-
-void ff_faandct(DCTELEM * data)
-{
- FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
- FLOAT tmp10, tmp11, tmp12, tmp13;
- FLOAT z1, z2, z3, z4, z5, z11, z13;
- FLOAT temp[64];
- int i;
-
- emms_c();
-
- row_fdct(temp, data);
-
- for (i=0; i<8; i++) {
- tmp0= temp[8*0 + i] + temp[8*7 + i];
- tmp7= temp[8*0 + i] - temp[8*7 + i];
- tmp1= temp[8*1 + i] + temp[8*6 + i];
- tmp6= temp[8*1 + i] - temp[8*6 + i];
- tmp2= temp[8*2 + i] + temp[8*5 + i];
- tmp5= temp[8*2 + i] - temp[8*5 + i];
- tmp3= temp[8*3 + i] + temp[8*4 + i];
- tmp4= temp[8*3 + i] - temp[8*4 + i];
-
- tmp10= tmp0 + tmp3;
- tmp13= tmp0 - tmp3;
- tmp11= tmp1 + tmp2;
- tmp12= tmp1 - tmp2;
-
- data[8*0 + i]= lrintf(SCALE(8*0 + i) * (tmp10 + tmp11));
- data[8*4 + i]= lrintf(SCALE(8*4 + i) * (tmp10 - tmp11));
-
- z1= (tmp12 + tmp13)* A1;
- data[8*2 + i]= lrintf(SCALE(8*2 + i) * (tmp13 + z1));
- data[8*6 + i]= lrintf(SCALE(8*6 + i) * (tmp13 - z1));
-
- tmp10= tmp4 + tmp5;
- tmp11= tmp5 + tmp6;
- tmp12= tmp6 + tmp7;
-
- z5= (tmp10 - tmp12) * A5;
- z2= tmp10*A2 + z5;
- z4= tmp12*A4 + z5;
- z3= tmp11*A1;
-
- z11= tmp7 + z3;
- z13= tmp7 - z3;
-
- data[8*5 + i]= lrintf(SCALE(8*5 + i) * (z13 + z2));
- data[8*3 + i]= lrintf(SCALE(8*3 + i) * (z13 - z2));
- data[8*1 + i]= lrintf(SCALE(8*1 + i) * (z11 + z4));
- data[8*7 + i]= lrintf(SCALE(8*7 + i) * (z11 - z4));
- }
-}
-
-void ff_faandct248(DCTELEM * data)
-{
- FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
- FLOAT tmp10, tmp11, tmp12, tmp13;
- FLOAT z1;
- FLOAT temp[64];
- int i;
-
- emms_c();
-
- row_fdct(temp, data);
-
- for (i=0; i<8; i++) {
- tmp0 = temp[8*0 + i] + temp[8*1 + i];
- tmp1 = temp[8*2 + i] + temp[8*3 + i];
- tmp2 = temp[8*4 + i] + temp[8*5 + i];
- tmp3 = temp[8*6 + i] + temp[8*7 + i];
- tmp4 = temp[8*0 + i] - temp[8*1 + i];
- tmp5 = temp[8*2 + i] - temp[8*3 + i];
- tmp6 = temp[8*4 + i] - temp[8*5 + i];
- tmp7 = temp[8*6 + i] - temp[8*7 + i];
-
- tmp10 = tmp0 + tmp3;
- tmp11 = tmp1 + tmp2;
- tmp12 = tmp1 - tmp2;
- tmp13 = tmp0 - tmp3;
-
- data[8*0 + i] = lrintf(SCALE(8*0 + i) * (tmp10 + tmp11));
- data[8*4 + i] = lrintf(SCALE(8*4 + i) * (tmp10 - tmp11));
-
- z1 = (tmp12 + tmp13)* A1;
- data[8*2 + i] = lrintf(SCALE(8*2 + i) * (tmp13 + z1));
- data[8*6 + i] = lrintf(SCALE(8*6 + i) * (tmp13 - z1));
-
- tmp10 = tmp4 + tmp7;
- tmp11 = tmp5 + tmp6;
- tmp12 = tmp5 - tmp6;
- tmp13 = tmp4 - tmp7;
-
- data[8*1 + i] = lrintf(SCALE(8*0 + i) * (tmp10 + tmp11));
- data[8*5 + i] = lrintf(SCALE(8*4 + i) * (tmp10 - tmp11));
-
- z1 = (tmp12 + tmp13)* A1;
- data[8*3 + i] = lrintf(SCALE(8*2 + i) * (tmp13 + z1));
- data[8*7 + i] = lrintf(SCALE(8*6 + i) * (tmp13 - z1));
- }
-}
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