/*
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; 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[21]={
- 65537,
- 65538,
- 65540,
- 65544,
- 65552,
- 65568,
- 65600,
- 65664,
- 65793,
- 66050,
- 66568,
- 67616,
- 69763,
- 74262,
- 84150,
- 108051,
- 178145,
- 484249,
- 3578144,
- 195360063,
- 582360139072LL,
+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){
+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;
+ 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;
+ uint64_t ret = 0;
+ uint64_t ret_sq = 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;
+ 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 main(int argc, char *argv[])
+{
int i, j;
- uint64_t sse=0;
+ 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){
+ 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("for wav files use the following:\n");
- printf("./tiny_psnr file1.wav file2.wav 2 0 44 to skip the header.\n");
- return -1;
+ printf("WAV headers are skipped automatically.\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);
+ 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;
+ }
- fseek(f[0],skip_bytes,SEEK_CUR);
- fseek(f[1],skip_bytes,SEEK_CUR);
+ 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);
+ }
+ }
- for(i=0;;){
- if( fread(buf[0], SIZE, 1, f[0]) != 1) break;
- if( fread(buf[1], SIZE, 1, f[1]) != 1) break;
+ fseek(f[shift < 0], abs(shift), SEEK_CUR);
- 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));
+ 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);
+ sse += (a - b) * (a - b);
+ dist = abs(a - b);
+ if (dist > maxdist)
+ maxdist = dist;
}
+ size0 += s0;
+ size1 += s1;
+ if (s0 + s1 <= 0)
+ break;
}
- 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);
+ i = FFMIN(size0, size1) / len;
+ 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 + (1LL << 31)) / (1LL << 32);
else
- psnr= 100*F-1; //floating point free infinity :)
+ psnr = 1000 * 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);
+ 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),
+ maxdist, size0, size1);
return 0;
}
-
-
projects / ffmpeg / blobdiff