fate: qtrle: disable audio in all tests
[libav.git] / tests / tiny_psnr.c
1 /*
2 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
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
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <inttypes.h>
25 #include <assert.h>
26
27 #define FFMIN(a, b) ((a) > (b) ? (b) : (a))
28 #define F 100
29 #define SIZE 2048
30
31 uint64_t exp16_table[21] = {
32 65537,
33 65538,
34 65540,
35 65544,
36 65552,
37 65568,
38 65600,
39 65664,
40 65793,
41 66050,
42 66568,
43 67616,
44 69763,
45 74262,
46 84150,
47 108051,
48 178145,
49 484249,
50 3578144,
51 195360063,
52 582360139072LL,
53 };
54
55 // 16.16 fixpoint log()
56 static int64_t log16(uint64_t a)
57 {
58 int i;
59 int out = 0;
60
61 if (a < 1 << 16)
62 return -log16((1LL << 32) / a);
63 a <<= 16;
64
65 for (i = 20; i >= 0; i--) {
66 int64_t b = exp16_table[i];
67 if (a < (b << 16))
68 continue;
69 out |= 1 << i;
70 a = ((a / b) << 16) + (((a % b) << 16) + b / 2) / b;
71 }
72 return out;
73 }
74
75 static uint64_t int_sqrt(uint64_t a)
76 {
77 uint64_t ret = 0;
78 uint64_t ret_sq = 0;
79 int s;
80
81 for (s = 31; s >= 0; s--) {
82 uint64_t b = ret_sq + (1ULL << (s * 2)) + (ret << s) * 2;
83 if (b <= a) {
84 ret_sq = b;
85 ret += 1ULL << s;
86 }
87 }
88 return ret;
89 }
90
91 int main(int argc, char *argv[])
92 {
93 int i, j;
94 uint64_t sse = 0;
95 uint64_t dev;
96 FILE *f[2];
97 uint8_t buf[2][SIZE];
98 uint64_t psnr;
99 int len = argc < 4 ? 1 : atoi(argv[3]);
100 int64_t max = (1 << (8 * len)) - 1;
101 int shift = argc < 5 ? 0 : atoi(argv[4]);
102 int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
103 int size0 = 0;
104 int size1 = 0;
105 int maxdist = 0;
106
107 if (argc < 3) {
108 printf("tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n");
109 printf("WAV headers are skipped automatically.\n");
110 return 1;
111 }
112
113 f[0] = fopen(argv[1], "rb");
114 f[1] = fopen(argv[2], "rb");
115 if (!f[0] || !f[1]) {
116 fprintf(stderr, "Could not open input files.\n");
117 return 1;
118 }
119
120 for (i = 0; i < 2; i++) {
121 uint8_t *p = buf[i];
122 if (fread(p, 1, 12, f[i]) != 12)
123 return 1;
124 if (!memcmp(p, "RIFF", 4) &&
125 !memcmp(p + 8, "WAVE", 4)) {
126 if (fread(p, 1, 8, f[i]) != 8)
127 return 1;
128 while (memcmp(p, "data", 4)) {
129 int s = p[4] | p[5] << 8 | p[6] << 16 | p[7] << 24;
130 fseek(f[i], s, SEEK_CUR);
131 if (fread(p, 1, 8, f[i]) != 8)
132 return 1;
133 }
134 } else {
135 fseek(f[i], -12, SEEK_CUR);
136 }
137 }
138
139 fseek(f[shift < 0], abs(shift), SEEK_CUR);
140
141 fseek(f[0], skip_bytes, SEEK_CUR);
142 fseek(f[1], skip_bytes, SEEK_CUR);
143
144 for (;;) {
145 int s0 = fread(buf[0], 1, SIZE, f[0]);
146 int s1 = fread(buf[1], 1, SIZE, f[1]);
147
148 for (j = 0; j < FFMIN(s0, s1); j++) {
149 int64_t a = buf[0][j];
150 int64_t b = buf[1][j];
151 int dist;
152 if (len == 2) {
153 a = (int16_t)(a | (buf[0][++j] << 8));
154 b = (int16_t)(b | (buf[1][ j] << 8));
155 }
156 sse += (a - b) * (a - b);
157 dist = abs(a - b);
158 if (dist > maxdist)
159 maxdist = dist;
160 }
161 size0 += s0;
162 size1 += s1;
163 if (s0 + s1 <= 0)
164 break;
165 }
166
167 i = FFMIN(size0, size1) / len;
168 if (!i)
169 i = 1;
170 dev = int_sqrt(((sse / i) * F * F) + (((sse % i) * F * F) + i / 2) / i);
171 if (sse)
172 psnr = ((2 * log16(max << 16) + log16(i) - log16(sse)) *
173 284619LL * F + (1LL << 31)) / (1LL << 32);
174 else
175 psnr = 1000 * F - 1; // floating point free infinity :)
176
177 printf("stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5d bytes:%9d/%9d\n",
178 (int)(dev / F), (int)(dev % F),
179 (int)(psnr / F), (int)(psnr % F),
180 maxdist, size0, size1);
181 return 0;
182 }