Merge remote-tracking branch 'qatar/master'

[ffmpeg] / libavcodec / snowenc.c

diff --git a/libavcodec/snowenc.c b/libavcodec/snowenc.c
index 4926eef5d21216f23bdba042a35669056bacf8b4..6f00941389043dfa5b6244f752892680a48f50bc 100644 (file)
--- a/libavcodec/snowenc.c
+++ b/libavcodec/snowenc.c
@@ -1,20 +1,20 @@
 /*
  * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * 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.
  *
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -1913,3 +1913,124 @@ AVCodec ff_snow_encoder = {
     .priv_class     = &snowenc_class,
 };
 #endif
+
+
+#ifdef TEST
+#undef malloc
+#undef free
+#undef printf
+
+#include "libavutil/lfg.h"
+#include "libavutil/mathematics.h"
+
+int main(void){
+    int width=256;
+    int height=256;
+    int buffer[2][width*height];
+    SnowContext s;
+    int i;
+    AVLFG prng;
+    s.spatial_decomposition_count=6;
+    s.spatial_decomposition_type=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], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
+    ff_spatial_idwt(buffer[0], 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], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
+    ff_spatial_idwt(buffer[0], 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(buffer[0], 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], 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;
+}
+#endif /* TEST */