movenc: Make tkhd "enabled" flag QuickTime compatible
[libav.git] / tests / tiny_psnr.c
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1/*
2 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
3 *
2912e87a 4 * This file is part of Libav.
244e1e64 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
244e1e64 9 * version 2.1 of the License, or (at your option) any later version.
67cbe681 10 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
2912e87a 17 * License along with Libav; if not, write to the Free Software
5509bffa 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
21#include <stdio.h>
ba96e97f 22#include <stdlib.h>
c43d77c1 23#include <string.h>
67cbe681 24#include <inttypes.h>
9e2a16e1 25#include <assert.h>
67cbe681 26
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27#include "libavutil/intfloat.h"
28
b481bbc3 29#define FFMIN(a, b) ((a) > (b) ? (b) : (a))
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30#define F 100
31#define SIZE 2048
32
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33uint64_t exp16_table[21] = {
34 65537,
35 65538,
36 65540,
37 65544,
38 65552,
39 65568,
40 65600,
41 65664,
42 65793,
43 66050,
44 66568,
45 67616,
46 69763,
47 74262,
48 84150,
49 108051,
50 178145,
51 484249,
52 3578144,
53 195360063,
54 582360139072LL,
9e2a16e1 55};
e9b67fe4 56
9e2a16e1 57// 16.16 fixpoint log()
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58static int64_t log16(uint64_t a)
59{
9e2a16e1 60 int i;
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61 int out = 0;
62
63 if (a < 1 << 16)
64 return -log16((1LL << 32) / a);
65 a <<= 16;
66
67 for (i = 20; i >= 0; i--) {
68 int64_t b = exp16_table[i];
69 if (a < (b << 16))
70 continue;
71 out |= 1 << i;
72 a = ((a / b) << 16) + (((a % b) << 16) + b / 2) / b;
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73 }
74 return out;
75}
76
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77static uint64_t int_sqrt(uint64_t a)
78{
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79 uint64_t ret = 0;
80 uint64_t ret_sq = 0;
67cbe681 81 int s;
67cbe681 82
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83 for (s = 31; s >= 0; s--) {
84 uint64_t b = ret_sq + (1ULL << (s * 2)) + (ret << s) * 2;
85 if (b <= a) {
86 ret_sq = b;
87 ret += 1ULL << s;
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88 }
89 }
90 return ret;
91}
92
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93static int16_t get_s16l(uint8_t *p)
94{
95 union {
96 uint16_t u;
97 int16_t s;
98 } v;
99 v.u = p[0] | p[1] << 8;
100 return v.s;
101}
102
103static float get_f32l(uint8_t *p)
104{
105 union av_intfloat32 v;
106 v.i = p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
107 return v.f;
108}
109
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110int main(int argc, char *argv[])
111{
67cbe681 112 int i, j;
b481bbc3 113 uint64_t sse = 0;
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114 uint64_t dev;
115 FILE *f[2];
116 uint8_t buf[2][SIZE];
9e2a16e1 117 uint64_t psnr;
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118 int len = 1;
119 int64_t max;
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120 int shift = argc < 5 ? 0 : atoi(argv[4]);
121 int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
122 int size0 = 0;
123 int size1 = 0;
124 int maxdist = 0;
125
126 if (argc < 3) {
b8889ea5 127 printf("tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n");
c43d77c1 128 printf("WAV headers are skipped automatically.\n");
3ec8d24a 129 return 1;
67cbe681 130 }
115329f1 131
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132 if (argc > 3) {
133 if (!strcmp(argv[3], "u8")) {
134 len = 1;
135 } else if (!strcmp(argv[3], "s16")) {
136 len = 2;
137 } else if (!strcmp(argv[3], "f32")) {
138 len = 4;
139 } else {
140 char *end;
141 len = strtol(argv[3], &end, 0);
3dc06b69 142 if (*end || len < 1 || len > 2) {
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143 fprintf(stderr, "Unsupported sample format: %s\n", argv[3]);
144 return 1;
145 }
146 }
147 }
148
bf868c4a 149 max = (1LL << (8 * len)) - 1;
9f1280de 150
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151 f[0] = fopen(argv[1], "rb");
152 f[1] = fopen(argv[2], "rb");
153 if (!f[0] || !f[1]) {
cc8de8e8 154 fprintf(stderr, "Could not open input files.\n");
3ec8d24a 155 return 1;
e740c796 156 }
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157
158 for (i = 0; i < 2; i++) {
159 uint8_t *p = buf[i];
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160 if (fread(p, 1, 12, f[i]) != 12)
161 return 1;
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162 if (!memcmp(p, "RIFF", 4) &&
163 !memcmp(p + 8, "WAVE", 4)) {
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164 if (fread(p, 1, 8, f[i]) != 8)
165 return 1;
c43d77c1 166 while (memcmp(p, "data", 4)) {
b481bbc3 167 int s = p[4] | p[5] << 8 | p[6] << 16 | p[7] << 24;
c43d77c1 168 fseek(f[i], s, SEEK_CUR);
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169 if (fread(p, 1, 8, f[i]) != 8)
170 return 1;
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171 }
172 } else {
173 fseek(f[i], -12, SEEK_CUR);
174 }
175 }
176
b481bbc3 177 fseek(f[shift < 0], abs(shift), SEEK_CUR);
67cbe681 178
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179 fseek(f[0], skip_bytes, SEEK_CUR);
180 fseek(f[1], skip_bytes, SEEK_CUR);
b8889ea5 181
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182 for (;;) {
183 int s0 = fread(buf[0], 1, SIZE, f[0]);
184 int s1 = fread(buf[1], 1, SIZE, f[1]);
115329f1 185
9f1280de 186 for (j = 0; j < FFMIN(s0, s1); j += len) {
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187 int64_t a = buf[0][j];
188 int64_t b = buf[1][j];
cb0067ec 189 int dist;
b481bbc3 190 if (len == 2) {
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191 a = get_s16l(buf[0] + j);
192 b = get_s16l(buf[1] + j);
193 } else if (len == 4) {
194 a = get_f32l(buf[0] + j) * (1 << 24);
195 b = get_f32l(buf[1] + j) * (1 << 24);
196 } else {
197 a = buf[0][j];
198 b = buf[1][j];
0c90161f 199 }
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200 sse += (a - b) * (a - b);
201 dist = abs(a - b);
202 if (dist > maxdist)
203 maxdist = dist;
67cbe681 204 }
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205 size0 += s0;
206 size1 += s1;
b481bbc3 207 if (s0 + s1 <= 0)
1e90317b 208 break;
67cbe681 209 }
115329f1 210
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211 i = FFMIN(size0, size1) / len;
212 if (!i)
213 i = 1;
214 dev = int_sqrt(((sse / i) * F * F) + (((sse % i) * F * F) + i / 2) / i);
215 if (sse)
216 psnr = ((2 * log16(max << 16) + log16(i) - log16(sse)) *
217 284619LL * F + (1LL << 31)) / (1LL << 32);
9e2a16e1 218 else
b481bbc3 219 psnr = 1000 * F - 1; // floating point free infinity :)
115329f1 220
cb0067ec 221 printf("stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5d bytes:%9d/%9d\n",
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222 (int)(dev / F), (int)(dev % F),
223 (int)(psnr / F), (int)(psnr % F),
224 maxdist, size0, size1);
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225 return 0;
226}