The Tor Browser: media/libyuv/util/compare.cc@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  *  Copyright 2012 The LibYuv Project Authors. All rights reserved.

     3  *

     4  *  Use of this source code is governed by a BSD-style license

     5  *  that can be found in the LICENSE file in the root of the source

     6  *  tree. An additional intellectual property rights grant can be found

     7  *  in the file PATENTS. All contributing project authors may

     8  *  be found in the AUTHORS file in the root of the source tree.

     9  */

    11 #include <stdio.h>

    12 #include <stdlib.h>

    13 #include <string.h>

    14 #include <time.h>

    16 #include "libyuv/basic_types.h"

    17 #include "libyuv/compare.h"

    18 #include "libyuv/version.h"

    20 int main(int argc, char** argv) {

    21   if (argc < 1) {

    22     printf("libyuv compare v%d\n", LIBYUV_VERSION);

    23     printf("compare file1.yuv file2.yuv\n");

    24     return -1;

    25   }

    26   char* name1 = argv[1];

    27   char* name2 = (argc > 2) ? argv[2] : NULL;

    28   FILE* fin1 = fopen(name1, "rb");

    29   FILE* fin2 = name2 ? fopen(name2, "rb") : NULL;

    31   const int kBlockSize = 32768;

    32   uint8 buf1[kBlockSize];

    33   uint8 buf2[kBlockSize];

    34   uint32 hash1 = 5381;

    35   uint32 hash2 = 5381;

    36   uint64 sum_square_err = 0;

    37   uint64 size_min = 0;

    38   int amt1 = 0;

    39   int amt2 = 0;

    40   do {

    41     amt1 = static_cast<int>(fread(buf1, 1, kBlockSize, fin1));

    42     if (amt1 > 0) hash1 = libyuv::HashDjb2(buf1, amt1, hash1);

    43     if (fin2) {

    44       amt2 = static_cast<int>(fread(buf2, 1, kBlockSize, fin2));

    45       if (amt2 > 0) hash2 = libyuv::HashDjb2(buf2, amt2, hash2);

    46       int amt_min = (amt1 < amt2) ? amt1 : amt2;

    47       size_min += amt_min;

    48       sum_square_err += libyuv::ComputeSumSquareError(buf1, buf2, amt_min);

    49     }

    50   } while (amt1 > 0 || amt2 > 0);

    52   printf("hash1 %x", hash1);

    53   if (fin2) {

    54     printf(", hash2 %x", hash2);

    55     double mse = static_cast<double>(sum_square_err) /

    56                  static_cast<double>(size_min);

    57     printf(", mse %.2f", mse);

    58     double psnr = libyuv::SumSquareErrorToPsnr(sum_square_err, size_min);

    59     printf(", psnr %.2f\n", psnr);

    60     fclose(fin2);

    61   }

    62   fclose(fin1);

    63 }

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