michael@0: /*
michael@0:  *  Copyright 2012 The LibYuv Project Authors. All rights reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS. All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: #include <stdio.h>
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: #include <time.h>
michael@0: 
michael@0: #include "libyuv/basic_types.h"
michael@0: #include "libyuv/compare.h"
michael@0: #include "libyuv/version.h"
michael@0: 
michael@0: int main(int argc, char** argv) {
michael@0:   if (argc < 1) {
michael@0:     printf("libyuv compare v%d\n", LIBYUV_VERSION);
michael@0:     printf("compare file1.yuv file2.yuv\n");
michael@0:     return -1;
michael@0:   }
michael@0:   char* name1 = argv[1];
michael@0:   char* name2 = (argc > 2) ? argv[2] : NULL;
michael@0:   FILE* fin1 = fopen(name1, "rb");
michael@0:   FILE* fin2 = name2 ? fopen(name2, "rb") : NULL;
michael@0: 
michael@0:   const int kBlockSize = 32768;
michael@0:   uint8 buf1[kBlockSize];
michael@0:   uint8 buf2[kBlockSize];
michael@0:   uint32 hash1 = 5381;
michael@0:   uint32 hash2 = 5381;
michael@0:   uint64 sum_square_err = 0;
michael@0:   uint64 size_min = 0;
michael@0:   int amt1 = 0;
michael@0:   int amt2 = 0;
michael@0:   do {
michael@0:     amt1 = static_cast<int>(fread(buf1, 1, kBlockSize, fin1));
michael@0:     if (amt1 > 0) hash1 = libyuv::HashDjb2(buf1, amt1, hash1);
michael@0:     if (fin2) {
michael@0:       amt2 = static_cast<int>(fread(buf2, 1, kBlockSize, fin2));
michael@0:       if (amt2 > 0) hash2 = libyuv::HashDjb2(buf2, amt2, hash2);
michael@0:       int amt_min = (amt1 < amt2) ? amt1 : amt2;
michael@0:       size_min += amt_min;
michael@0:       sum_square_err += libyuv::ComputeSumSquareError(buf1, buf2, amt_min);
michael@0:     }
michael@0:   } while (amt1 > 0 || amt2 > 0);
michael@0: 
michael@0:   printf("hash1 %x", hash1);
michael@0:   if (fin2) {
michael@0:     printf(", hash2 %x", hash2);
michael@0:     double mse = static_cast<double>(sum_square_err) /
michael@0:                  static_cast<double>(size_min);
michael@0:     printf(", mse %.2f", mse);
michael@0:     double psnr = libyuv::SumSquareErrorToPsnr(sum_square_err, size_min);
michael@0:     printf(", psnr %.2f\n", psnr);
michael@0:     fclose(fin2);
michael@0:   }
michael@0:   fclose(fin1);
michael@0: }