/*
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * License along with FFmpeg; 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 <string.h>
#include <inttypes.h>
#include <assert.h>
+#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
#define F 100
#define SIZE 2048
-uint64_t exp16_table[20]={
+uint64_t exp16_table[21]={
65537,
65538,
65540,
484249,
3578144,
195360063,
+ 582360139072LL,
};
-#if 1
+
+#if 0
// 16.16 fixpoint exp()
static unsigned int exp16(unsigned int a){
int i;
return out;
}
+#endif
+
// 16.16 fixpoint log()
-static uint64_t log16(uint64_t a){
+static int64_t log16(uint64_t a){
int i;
int out=0;
-
- assert(a >= (1<<16));
+
+ if(a < 1<<16)
+ return -log16((1LL<<32) / a);
a<<=16;
-
- for(i=19;i>=0;i--){
+
+ for(i=20;i>=0;i--){
int64_t b= exp16_table[i];
if(a<(b<<16)) continue;
out |= 1<<i;
return out;
}
-#endif
static uint64_t int_sqrt(uint64_t a)
{
uint64_t ret=0;
FILE *f[2];
uint8_t buf[2][SIZE];
uint64_t psnr;
-
- if(argc!=3){
- printf("tiny_psnr <file1> <file2>\n");
- return -1;
+ 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]);
+ int size0=0;
+ int size1=0;
+ int maxdist = 0;
+
+ if(argc<3){
+ printf("tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n");
+ printf("WAV headers are skipped automatically.\n");
+ return 1;
}
-
- f[0]= fopen(argv[1], "r");
- f[1]= fopen(argv[2], "r");
-
- 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++){
- const int a= buf[0][j];
- const int b= buf[1][j];
+
+ f[0]= fopen(argv[1], "rb");
+ f[1]= fopen(argv[2], "rb");
+ if(!f[0] || !f[1]){
+ fprintf(stderr, "Could not open input files.\n");
+ return 1;
+ }
+
+ for (i = 0; i < 2; i++) {
+ uint8_t *p = buf[i];
+ if (fread(p, 1, 12, f[i]) != 12)
+ return 1;
+ if (!memcmp(p, "RIFF", 4) &&
+ !memcmp(p+8, "WAVE", 4)) {
+ if (fread(p, 1, 8, f[i]) != 8)
+ return 1;
+ while (memcmp(p, "data", 4)) {
+ int s = p[4] | p[5]<<8 | p[6]<<16 | p[7]<<24;
+ fseek(f[i], s, SEEK_CUR);
+ if (fread(p, 1, 8, f[i]) != 8)
+ return 1;
+ }
+ } else {
+ fseek(f[i], -12, SEEK_CUR);
+ }
+ }
+
+ fseek(f[shift<0], abs(shift), SEEK_CUR);
+
+ fseek(f[0],skip_bytes,SEEK_CUR);
+ fseek(f[1],skip_bytes,SEEK_CUR);
+
+ for(;;){
+ int s0= fread(buf[0], 1, SIZE, f[0]);
+ int s1= fread(buf[1], 1, SIZE, f[1]);
+
+ for(j=0; j<FFMIN(s0,s1); j++){
+ int64_t a= buf[0][j];
+ int64_t b= buf[1][j];
+ int dist;
+ if(len==2){
+ a= (int16_t)(a | (buf[0][++j]<<8));
+ b= (int16_t)(b | (buf[1][ j]<<8));
+ }
sse += (a-b) * (a-b);
+ dist = abs(a-b);
+ if (dist > maxdist) maxdist = dist;
}
+ size0 += s0;
+ size1 += s1;
+ if(s0+s1<=0)
+ break;
}
-
+
+ i= FFMIN(size0,size1)/len;
if(!i) i=1;
- dev= int_sqrt((sse*F*F)/i);
+ dev= int_sqrt( ((sse/i)*F*F) + (((sse%i)*F*F) + i/2)/i );
if(sse)
- psnr= (log16(256*256*255*255LL*i/sse)*284619LL*F + (1<<31)) / (1LL<<32);
+ psnr= ((2*log16(max<<16) + log16(i) - log16(sse))*284619LL*F + (1LL<<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),
+ psnr= 1000*F-1; //floating point free infinity :)
+
+ printf("stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5d bytes:%9d/%9d\n",
+ (int)(dev/F), (int)(dev%F),
(int)(psnr/F), (int)(psnr%F),
- i);
+ maxdist,
+ size0, size1);
return 0;
}
projects / ffmpeg / blobdiff