diff options
Diffstat (limited to 'contrib/ffmpeg/tests/tiny_psnr.c')
-rw-r--r-- | contrib/ffmpeg/tests/tiny_psnr.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/contrib/ffmpeg/tests/tiny_psnr.c b/contrib/ffmpeg/tests/tiny_psnr.c deleted file mode 100644 index d8bce2b7b..000000000 --- a/contrib/ffmpeg/tests/tiny_psnr.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> - * - * This library 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 of the License, or (at your option) any later version. - * - * This library 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 this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - */ - -#include <stdio.h> -#include <stdlib.h> -#include <inttypes.h> -#include <assert.h> - -#define F 100 -#define SIZE 2048 - -uint64_t exp16_table[21]={ - 65537, - 65538, - 65540, - 65544, - 65552, - 65568, - 65600, - 65664, - 65793, - 66050, - 66568, - 67616, - 69763, - 74262, - 84150, - 108051, - 178145, - 484249, - 3578144, - 195360063, - 582360139072LL, -}; -#if 1 -// 16.16 fixpoint exp() -static unsigned int exp16(unsigned int a){ - int i; - int out= 1<<16; - - for(i=19;i>=0;i--){ - if(a&(1<<i)) - out= (out*exp16_table[i] + (1<<15))>>16; - } - - return out; -} -// 16.16 fixpoint log() -static int64_t log16(uint64_t a){ - int i; - int out=0; - - if(a < 1<<16) - return -log16((1LL<<32) / a); - a<<=16; - - for(i=20;i>=0;i--){ - int64_t b= exp16_table[i]; - if(a<(b<<16)) continue; - out |= 1<<i; - a = ((a/b)<<16) + (((a%b)<<16) + b/2)/b; - } - return out; -} - -#endif -static uint64_t int_sqrt(uint64_t a) -{ - uint64_t ret=0; - int s; - uint64_t ret_sq=0; - - for(s=31; s>=0; s--){ - uint64_t b= ret_sq + (1ULL<<(s*2)) + (ret<<s)*2; - if(b<=a){ - ret_sq=b; - ret+= 1ULL<<s; - } - } - return ret; -} - -int main(int argc,char* argv[]){ - int i, j; - uint64_t sse=0; - uint64_t dev; - FILE *f[2]; - uint8_t buf[2][SIZE]; - uint64_t psnr; - int len= argc<4 ? 1 : atoi(argv[3]); - int64_t max= (1<<(8*len))-1; - int shift= argc<5 ? 0 : atoi(argv[4]); - int skip_bytes = argc<6 ? 0 : atoi(argv[5]); - - if(argc<3){ - printf("tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n"); - printf("for wav files use the following:\n"); - printf("./tiny_psnr file1.wav file2.wav 2 0 44 to skip the header.\n"); - return -1; - } - - f[0]= fopen(argv[1], "rb"); - f[1]= fopen(argv[2], "rb"); - fseek(f[shift<0], shift < 0 ? -shift : shift, SEEK_SET); - - fseek(f[0],skip_bytes,SEEK_CUR); - fseek(f[1],skip_bytes,SEEK_CUR); - - for(i=0;;){ - if( fread(buf[0], SIZE, 1, f[0]) != 1) break; - if( fread(buf[1], SIZE, 1, f[1]) != 1) break; - - for(j=0; j<SIZE; i++,j++){ - int64_t a= buf[0][j]; - int64_t b= buf[1][j]; - if(len==2){ - a= (int16_t)(a | (buf[0][++j]<<8)); - b= (int16_t)(b | (buf[1][ j]<<8)); - } - sse += (a-b) * (a-b); - } - } - - if(!i) i=1; - dev= int_sqrt( ((sse/i)*F*F) + (((sse%i)*F*F) + i/2)/i ); - if(sse) - psnr= ((2*log16(max<<16) + log16(i) - log16(sse))*284619LL*F + (1<<31)) / (1LL<<32); - else - psnr= 100*F-1; //floating point free infinity :) - - printf("stddev:%3d.%02d PSNR:%2d.%02d bytes:%d\n", - (int)(dev/F), (int)(dev%F), - (int)(psnr/F), (int)(psnr%F), - i*len); - return 0; -} - - |