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-rw-r--r--tests/tiny_psnr.c168
1 files changed, 103 insertions, 65 deletions
diff --git a/tests/tiny_psnr.c b/tests/tiny_psnr.c
index 66eaf82..b35ed81 100644
--- a/tests/tiny_psnr.c
+++ b/tests/tiny_psnr.c
@@ -1,20 +1,20 @@
/*
* Copyright (c) 2003 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
*/
@@ -22,9 +22,9 @@
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
-#include <assert.h>
#include <math.h>
#include <float.h>
+#include <limits.h>
#include "libavutil/intfloat.h"
#include "libavutil/intreadwrite.h"
@@ -57,6 +57,21 @@ uint64_t exp16_table[21] = {
582360139072LL,
};
+#if 0
+// 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;
+}
+#endif
+
// 16.16 fixpoint log()
static int64_t log16(uint64_t a)
{
@@ -115,79 +130,47 @@ static double get_f64l(uint8_t *p)
return av_int2double(AV_RL64(p));
}
-int main(int argc, char *argv[])
+static int run_psnr(FILE *f[2], int len, int shift, int skip_bytes)
{
int i, j;
uint64_t sse = 0;
double sse_d = 0.0;
- FILE *f[2];
uint8_t buf[2][SIZE];
- int len = 1;
- int64_t max;
- int shift = argc < 5 ? 0 : atoi(argv[4]);
- int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
+ int64_t max = (1LL << (8 * len)) - 1;
int size0 = 0;
int size1 = 0;
uint64_t maxdist = 0;
double maxdist_d = 0.0;
+ int noseek;
- if (argc < 3) {
- printf("tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n");
- printf("WAV headers are skipped automatically.\n");
- return 1;
- }
+ noseek = fseek(f[0], 0, SEEK_SET) ||
+ fseek(f[1], 0, SEEK_SET);
- 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 if (!strcmp(argv[3], "f64")) {
- len = 8;
- } else {
- char *end;
- len = strtol(argv[3], &end, 0);
- if (*end || len < 1 || len > 2) {
- fprintf(stderr, "Unsupported sample format: %s\n", argv[3]);
+ if (!noseek) {
+ for (i = 0; i < 2; i++) {
+ uint8_t *p = buf[i];
+ if (fread(p, 1, 12, f[i]) != 12)
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 (!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);
}
- } else {
- fseek(f[i], -12, SEEK_CUR);
}
- }
- fseek(f[shift < 0], abs(shift), SEEK_CUR);
+ fseek(f[shift < 0], abs(shift), SEEK_CUR);
- fseek(f[0], skip_bytes, SEEK_CUR);
- fseek(f[1], skip_bytes, 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]);
@@ -197,8 +180,7 @@ int main(int argc, char *argv[])
switch (len) {
case 1:
case 2: {
- int64_t a = buf[0][j];
- int64_t b = buf[1][j];
+ int64_t a, b;
int dist;
if (len == 2) {
a = get_s16l(buf[0] + j);
@@ -255,16 +237,17 @@ int main(int argc, char *argv[])
(int)(dev / F), (int)(dev % F),
(int)(psnr / F), (int)(psnr % F),
maxdist, size0, size1);
- break;
+ return psnr;
}
case 4:
case 8: {
char psnr_str[64];
+ double psnr = INT_MAX;
double dev = sqrt(sse_d / i);
uint64_t scale = (len == 4) ? (1ULL << 24) : (1ULL << 32);
if (sse_d) {
- double psnr = 2 * log(DBL_MAX) - log(i / sse_d);
+ psnr = 2 * log(DBL_MAX) - log(i / sse_d);
snprintf(psnr_str, sizeof(psnr_str), "%5.02f", psnr);
} else
snprintf(psnr_str, sizeof(psnr_str), "inf");
@@ -273,8 +256,63 @@ int main(int argc, char *argv[])
printf("stddev:%10.2f PSNR:%s MAXDIFF:%10"PRIu64" bytes:%9d/%9d\n",
dev * scale, psnr_str, maxdist, size0, size1);
- break;
+ return psnr;
+ }
+ }
+ return -1;
+}
+
+int main(int argc, char *argv[])
+{
+ FILE *f[2];
+ int len = 1;
+ int shift_first= argc < 5 ? 0 : atoi(argv[4]);
+ int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
+ int shift_last = shift_first + (argc < 7 ? 0 : atoi(argv[6]));
+ int shift;
+ int max_psnr = -1;
+ int max_psnr_shift = 0;
+
+ 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 if (!strcmp(argv[3], "f64")) {
+ len = 8;
+ } else {
+ char *end;
+ len = strtol(argv[3], &end, 0);
+ if (*end || len < 1 || len > 2) {
+ fprintf(stderr, "Unsupported sample format: %s\nSupported: u8, s16, f32, f64\n", argv[3]);
+ return 1;
+ }
+ }
}
+
+ if (argc < 3) {
+ printf("tiny_psnr <file1> <file2> [<elem size>|u8|s16|f32|f64 [<shift> [<skip bytes> [<shift search range>]]]]\n");
+ printf("WAV headers are skipped automatically.\n");
+ return 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 (shift = shift_first; shift <= shift_last; shift++) {
+ int psnr = run_psnr(f, len, shift, skip_bytes);
+ if (psnr > max_psnr || (shift < 0 && psnr == max_psnr)) {
+ max_psnr = psnr;
+ max_psnr_shift = shift;
+ }
}
+ if (shift_last > shift_first)
+ printf("Best PSNR is %3d.%02d for shift %i\n", (int)(max_psnr / F), (int)(max_psnr % F), max_psnr_shift);
return 0;
}
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