/*
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * 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 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,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * 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>
+
+#include "libavutil/intfloat.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,
+};
+
+// 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;
+}
+
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[]){
+static int16_t get_s16l(uint8_t *p)
+{
+ union {
+ uint16_t u;
+ int16_t s;
+ } v;
+ v.u = p[0] | p[1] << 8;
+ return v.s;
+}
+
+static float get_f32l(uint8_t *p)
+{
+ union av_intfloat32 v;
+ v.i = p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
+ return v.f;
+}
+
+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];
-
- if(argc!=3){
- printf("tiny_psnr <file1> <file2>\n");
- return -1;
+ uint64_t psnr;
+ int len = 1;
+ int64_t max;
+ 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;
+ }
+
+ if (argc > 3) {
+ if (!strcmp(argv[3], "u8")) {
+ len = 1;
+ } else if (!strcmp(argv[3], "s16")) {
+ len = 2;
+ } else if (!strcmp(argv[3], "f32")) {
+ len = 4;
+ } else {
+ char *end;
+ len = strtol(argv[3], &end, 0);
+ if (*end || len < 1 || len > 2) {
+ fprintf(stderr, "Unsupported sample format: %s\n", argv[3]);
+ return 1;
+ }
+ }
+ }
+
+ max = (1LL << (8 * len)) - 1;
+
+ 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);
+ }
}
-
- 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];
- sse += (a-b) * (a-b);
+
+ 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 += len) {
+ int64_t a = buf[0][j];
+ int64_t b = buf[1][j];
+ int dist;
+ if (len == 2) {
+ a = get_s16l(buf[0] + j);
+ b = get_s16l(buf[1] + j);
+ } else if (len == 4) {
+ a = get_f32l(buf[0] + j) * (1 << 24);
+ b = get_f32l(buf[1] + j) * (1 << 24);
+ } else {
+ a = buf[0][j];
+ b = buf[1][j];
+ }
+ sse += (a - b) * (a - b);
+ dist = abs(a - b);
+ if (dist > maxdist)
+ maxdist = dist;
}
+ size0 += s0;
+ size1 += s1;
+ if (s0 + s1 <= 0)
+ break;
}
-
- dev= int_sqrt((sse*F*F)/i);
-
- //FIXME someone should write a integer fixpoint log() function for bitexact PSNR scores ...
- printf("stddev:%3d.%02d bytes:%d\n", (int)(dev/F), (int)(dev%F), i);
-
+
+ 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 = 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),
+ maxdist, size0, size1);
return 0;
}
projects / ffmpeg / blobdiff