/* * 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 */ #include "libavcodec/snowenc.c" #undef malloc #undef free #undef printf #include "libavutil/lfg.h" #include "libavutil/mathematics.h" int main(void){ #define width 256 #define height 256 int buffer[2][width*height]; SnowContext s; int i; AVLFG prng; s.spatial_decomposition_count=6; s.spatial_decomposition_type=1; s.temp_dwt_buffer = av_mallocz_array(width, sizeof(DWTELEM)); s.temp_idwt_buffer = av_mallocz_array(width, sizeof(IDWTELEM)); if (!s.temp_dwt_buffer || !s.temp_idwt_buffer) { fprintf(stderr, "Failed to allocate memory\n"); return 1; } av_lfg_init(&prng, 1); printf("testing 5/3 DWT\n"); for(i=0; i<width*height; i++) buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345; ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count); ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count); for(i=0; i<width*height; i++) if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]); printf("testing 9/7 DWT\n"); s.spatial_decomposition_type=0; for(i=0; i<width*height; i++) buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345; ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count); ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count); for(i=0; i<width*height; i++) if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]); { int level, orientation, x, y; int64_t errors[8][4]; int64_t g=0; memset(errors, 0, sizeof(errors)); s.spatial_decomposition_count=3; s.spatial_decomposition_type=0; for(level=0; level<s.spatial_decomposition_count; level++){ for(orientation=level ? 1 : 0; orientation<4; orientation++){ int w= width >> (s.spatial_decomposition_count-level); int h= height >> (s.spatial_decomposition_count-level); int stride= width << (s.spatial_decomposition_count-level); DWTELEM *buf= buffer[0]; int64_t error=0; if(orientation&1) buf+=w; if(orientation>1) buf+=stride>>1; memset(buffer[0], 0, sizeof(int)*width*height); buf[w/2 + h/2*stride]= 256*256; ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count); for(y=0; y<height; y++){ for(x=0; x<width; x++){ int64_t d= buffer[0][x + y*width]; error += d*d; if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d); } if(FFABS(height/2-y)<9 && level==2) printf("\n"); } error= (int)(sqrt(error)+0.5); errors[level][orientation]= error; if(g) g=av_gcd(g, error); else g= error; } } printf("static int const visual_weight[][4]={\n"); for(level=0; level<s.spatial_decomposition_count; level++){ printf(" {"); for(orientation=0; orientation<4; orientation++){ printf("%8"PRId64",", errors[level][orientation]/g); } printf("},\n"); } printf("};\n"); { int level=2; int w= width >> (s.spatial_decomposition_count-level); //int h= height >> (s.spatial_decomposition_count-level); int stride= width << (s.spatial_decomposition_count-level); DWTELEM *buf= buffer[0]; int64_t error=0; buf+=w; buf+=stride>>1; memset(buffer[0], 0, sizeof(int)*width*height); for(y=0; y<height; y++){ for(x=0; x<width; x++){ int tab[4]={0,2,3,1}; buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)]; } } ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count); for(y=0; y<height; y++){ for(x=0; x<width; x++){ int64_t d= buffer[0][x + y*width]; error += d*d; if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d); } if(FFABS(height/2-y)<9) printf("\n"); } } } return 0; }