fate: exit with error immediately if test command fails
[libav.git] / tests / tiny_psnr.c
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1/*
2 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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 *
244e1e64 11 * FFmpeg 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
244e1e64 17 * License along with FFmpeg; 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
1e90317b 27#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
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28#define F 100
29#define SIZE 2048
30
0c90161f 31uint64_t exp16_table[21]={
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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,
0c90161f 52 582360139072LL,
9e2a16e1 53};
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54
55#if 0
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56// 16.16 fixpoint exp()
57static unsigned int exp16(unsigned int a){
58 int i;
59 int out= 1<<16;
60
61 for(i=19;i>=0;i--){
62 if(a&(1<<i))
63 out= (out*exp16_table[i] + (1<<15))>>16;
64 }
9e2a16e1 65
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66 return out;
67}
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68#endif
69
9e2a16e1 70// 16.16 fixpoint log()
0c90161f 71static int64_t log16(uint64_t a){
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72 int i;
73 int out=0;
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74
75 if(a < 1<<16)
76 return -log16((1LL<<32) / a);
9e2a16e1 77 a<<=16;
115329f1 78
0c90161f 79 for(i=20;i>=0;i--){
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80 int64_t b= exp16_table[i];
81 if(a<(b<<16)) continue;
9e2a16e1 82 out |= 1<<i;
8176bd1a 83 a = ((a/b)<<16) + (((a%b)<<16) + b/2)/b;
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84 }
85 return out;
86}
87
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88static uint64_t int_sqrt(uint64_t a)
89{
90 uint64_t ret=0;
91 int s;
92 uint64_t ret_sq=0;
93
94 for(s=31; s>=0; s--){
95 uint64_t b= ret_sq + (1ULL<<(s*2)) + (ret<<s)*2;
96 if(b<=a){
97 ret_sq=b;
98 ret+= 1ULL<<s;
99 }
100 }
101 return ret;
102}
103
104int main(int argc,char* argv[]){
105 int i, j;
106 uint64_t sse=0;
107 uint64_t dev;
108 FILE *f[2];
109 uint8_t buf[2][SIZE];
9e2a16e1 110 uint64_t psnr;
ba96e97f 111 int len= argc<4 ? 1 : atoi(argv[3]);
0c90161f 112 int64_t max= (1<<(8*len))-1;
ba96e97f 113 int shift= argc<5 ? 0 : atoi(argv[4]);
b8889ea5 114 int skip_bytes = argc<6 ? 0 : atoi(argv[5]);
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115 int size0=0;
116 int size1=0;
cb0067ec 117 int maxdist = 0;
115329f1 118
0c90161f 119 if(argc<3){
b8889ea5 120 printf("tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n");
c43d77c1 121 printf("WAV headers are skipped automatically.\n");
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122 return -1;
123 }
115329f1 124
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125 f[0]= fopen(argv[1], "rb");
126 f[1]= fopen(argv[2], "rb");
e740c796 127 if(!f[0] || !f[1]){
cc8de8e8 128 fprintf(stderr, "Could not open input files.\n");
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129 return -1;
130 }
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131
132 for (i = 0; i < 2; i++) {
133 uint8_t *p = buf[i];
134 fread(p, 1, 12, f[i]);
135 if (!memcmp(p, "RIFF", 4) &&
136 !memcmp(p+8, "WAVE", 4)) {
137 fread(p, 1, 8, f[i]);
138 while (memcmp(p, "data", 4)) {
139 int s = p[4] | p[5]<<8 | p[6]<<16 | p[7]<<24;
140 fseek(f[i], s, SEEK_CUR);
141 fread(p, 1, 8, f[i]);
142 }
143 } else {
144 fseek(f[i], -12, SEEK_CUR);
145 }
146 }
147
f6dddd33 148 fseek(f[shift<0], abs(shift), SEEK_CUR);
67cbe681 149
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150 fseek(f[0],skip_bytes,SEEK_CUR);
151 fseek(f[1],skip_bytes,SEEK_CUR);
152
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153 for(;;){
154 int s0= fread(buf[0], 1, SIZE, f[0]);
155 int s1= fread(buf[1], 1, SIZE, f[1]);
115329f1 156
1e90317b 157 for(j=0; j<FFMIN(s0,s1); j++){
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158 int64_t a= buf[0][j];
159 int64_t b= buf[1][j];
cb0067ec 160 int dist;
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161 if(len==2){
162 a= (int16_t)(a | (buf[0][++j]<<8));
163 b= (int16_t)(b | (buf[1][ j]<<8));
164 }
67cbe681 165 sse += (a-b) * (a-b);
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166 dist = abs(a-b);
167 if (dist > maxdist) maxdist = dist;
67cbe681 168 }
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169 size0 += s0;
170 size1 += s1;
171 if(s0+s1<=0)
172 break;
67cbe681 173 }
115329f1 174
1e90317b 175 i= FFMIN(size0,size1)/len;
eeaa742c 176 if(!i) i=1;
0c90161f 177 dev= int_sqrt( ((sse/i)*F*F) + (((sse%i)*F*F) + i/2)/i );
9e2a16e1 178 if(sse)
b00803e0 179 psnr= ((2*log16(max<<16) + log16(i) - log16(sse))*284619LL*F + (1LL<<31)) / (1LL<<32);
9e2a16e1 180 else
1e90317b 181 psnr= 1000*F-1; //floating point free infinity :)
115329f1 182
cb0067ec 183 printf("stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5d bytes:%9d/%9d\n",
115329f1 184 (int)(dev/F), (int)(dev%F),
9e2a16e1 185 (int)(psnr/F), (int)(psnr%F),
cb0067ec 186 maxdist,
1e90317b 187 size0, size1);
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188 return 0;
189}
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190
191