1 /* Copyright (c) 2013 The Chromium OS Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 */ 5 6 #include <math.h> 7 #include <stdio.h> 8 #include <stdlib.h> 9 #include <sys/types.h> 10 #include <sys/stat.h> 11 #include <fcntl.h> 12 #include <unistd.h> 13 #include "raw.h" 14 15 /* Compare the difference between two raw files */ 16 17 static inline double max(double a, double b) 18 { 19 return (a > b) ? a : b; 20 } 21 22 int main(int argc, char **argv) 23 { 24 size_t frame1, frame2; 25 float *data1, *data2; 26 size_t i, n, changed; 27 double diff = 0; 28 double maxdiff = 0; 29 30 if (argc != 3) { 31 fprintf(stderr, "usage: cmpraw 1.raw 2.raw\n"); 32 exit(1); 33 } 34 35 data1 = read_raw(argv[1], &frame1); 36 data2 = read_raw(argv[2], &frame2); 37 38 if (frame1 != frame2) { 39 fprintf(stderr, "mismatch size (%zu vs %zu)\n", frame1, frame2); 40 exit(1); 41 } 42 43 n = frame1 * 2; 44 changed = 0; 45 for (i = 0; i < n; i++) { 46 if (data1[i] != data2[i]) { 47 changed++; 48 diff += fabs(data1[i] - data2[i]); 49 maxdiff = max(fabs(data1[i] - data2[i]), maxdiff); 50 } 51 } 52 printf("avg diff = %g, max diff = %g, changed = %.3f%%\n", 53 diff / n, maxdiff * 32768, changed*100.0f/n); 54 55 free(data1); 56 free(data2); 57 return 0; 58 } 59
