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-rw-r--r--media/libyuv/util/compare.cc63
1 files changed, 63 insertions, 0 deletions
diff --git a/media/libyuv/util/compare.cc b/media/libyuv/util/compare.cc
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+++ b/media/libyuv/util/compare.cc
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+/*
+ * Copyright 2012 The LibYuv Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "libyuv/basic_types.h"
+#include "libyuv/compare.h"
+#include "libyuv/version.h"
+
+int main(int argc, char** argv) {
+ if (argc < 1) {
+ printf("libyuv compare v%d\n", LIBYUV_VERSION);
+ printf("compare file1.yuv file2.yuv\n");
+ return -1;
+ }
+ char* name1 = argv[1];
+ char* name2 = (argc > 2) ? argv[2] : NULL;
+ FILE* fin1 = fopen(name1, "rb");
+ FILE* fin2 = name2 ? fopen(name2, "rb") : NULL;
+
+ const int kBlockSize = 32768;
+ uint8 buf1[kBlockSize];
+ uint8 buf2[kBlockSize];
+ uint32 hash1 = 5381;
+ uint32 hash2 = 5381;
+ uint64 sum_square_err = 0;
+ uint64 size_min = 0;
+ int amt1 = 0;
+ int amt2 = 0;
+ do {
+ amt1 = static_cast<int>(fread(buf1, 1, kBlockSize, fin1));
+ if (amt1 > 0) hash1 = libyuv::HashDjb2(buf1, amt1, hash1);
+ if (fin2) {
+ amt2 = static_cast<int>(fread(buf2, 1, kBlockSize, fin2));
+ if (amt2 > 0) hash2 = libyuv::HashDjb2(buf2, amt2, hash2);
+ int amt_min = (amt1 < amt2) ? amt1 : amt2;
+ size_min += amt_min;
+ sum_square_err += libyuv::ComputeSumSquareError(buf1, buf2, amt_min);
+ }
+ } while (amt1 > 0 || amt2 > 0);
+
+ printf("hash1 %x", hash1);
+ if (fin2) {
+ printf(", hash2 %x", hash2);
+ double mse = static_cast<double>(sum_square_err) /
+ static_cast<double>(size_min);
+ printf(", mse %.2f", mse);
+ double psnr = libyuv::SumSquareErrorToPsnr(sum_square_err, size_min);
+ printf(", psnr %.2f\n", psnr);
+ fclose(fin2);
+ }
+ fclose(fin1);
+}