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Diffstat (limited to 'ffmpeg/tests/tiny_psnr.c')
-rw-r--r--ffmpeg/tests/tiny_psnr.c319
1 files changed, 0 insertions, 319 deletions
diff --git a/ffmpeg/tests/tiny_psnr.c b/ffmpeg/tests/tiny_psnr.c
deleted file mode 100644
index b4fc02c..0000000
--- a/ffmpeg/tests/tiny_psnr.c
+++ /dev/null
@@ -1,319 +0,0 @@
-/*
- * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
- *
- * 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 2.1 of the License, or (at your option) any later version.
- *
- * 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 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 <math.h>
-#include <float.h>
-#include <limits.h>
-
-#include "libavutil/intfloat.h"
-#include "libavutil/intreadwrite.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,
-};
-
-#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)
-{
- 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_sq = 0;
- int 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;
-}
-
-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;
-}
-
-static double get_f64l(uint8_t *p)
-{
- return av_int2double(AV_RL64(p));
-}
-
-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;
- uint8_t buf[2][SIZE];
- int64_t max = (1LL << (8 * len)) - 1;
- int size0 = 0;
- int size1 = 0;
- uint64_t maxdist = 0;
- double maxdist_d = 0.0;
- int noseek;
-
- noseek = fseek(f[0], 0, SEEK_SET) ||
- fseek(f[1], 0, SEEK_SET);
-
- if (!noseek) {
- 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 += len) {
- switch (len) {
- case 1:
- case 2: {
- 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 {
- a = buf[0][j];
- b = buf[1][j];
- }
- sse += (a - b) * (a - b);
- dist = abs(a - b);
- if (dist > maxdist)
- maxdist = dist;
- break;
- }
- case 4:
- case 8: {
- double dist, a, b;
- if (len == 8) {
- a = get_f64l(buf[0] + j);
- b = get_f64l(buf[1] + j);
- } else {
- a = get_f32l(buf[0] + j);
- b = get_f32l(buf[1] + j);
- }
- dist = fabs(a - b);
- sse_d += (a - b) * (a - b);
- if (dist > maxdist_d)
- maxdist_d = dist;
- break;
- }
- }
- }
- size0 += s0;
- size1 += s1;
- if (s0 + s1 <= 0)
- break;
- }
-
- i = FFMIN(size0, size1) / len;
- if (!i)
- i = 1;
- switch (len) {
- case 1:
- case 2: {
- uint64_t psnr;
- uint64_t 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:%5"PRIu64" bytes:%9d/%9d\n",
- (int)(dev / F), (int)(dev % F),
- (int)(psnr / F), (int)(psnr % F),
- maxdist, size0, size1);
- 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) {
- 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");
-
- maxdist = maxdist_d * scale;
-
- printf("stddev:%10.2f PSNR:%s MAXDIFF:%10"PRIu64" bytes:%9d/%9d\n",
- dev * scale, psnr_str, maxdist, size0, size1);
- 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\n", argv[3]);
- return 1;
- }
- }
- }
-
- if (argc < 3) {
- printf("tiny_psnr <file1> <file2> [<elem size> [<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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