1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libyuv/util/psnr.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,39 @@
1.4 +/*
1.5 + * Copyright 2013 The LibYuv Project Authors. All rights reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +// Get PSNR for video sequence. Assuming RAW 4:2:0 Y:Cb:Cr format
1.15 +
1.16 +#ifndef UTIL_PSNR_H_ // NOLINT
1.17 +#define UTIL_PSNR_H_
1.18 +
1.19 +#ifdef __cplusplus
1.20 +extern "C" {
1.21 +#endif
1.22 +
1.23 +#if !defined(INT_TYPES_DEFINED) && !defined(UINT8_TYPE_DEFINED)
1.24 +typedef unsigned char uint8;
1.25 +#define UINT8_TYPE_DEFINED
1.26 +#endif
1.27 +
1.28 +static const double kMaxPSNR = 128.0;
1.29 +
1.30 +// PSNR formula: psnr = 10 * log10 (Peak Signal^2 * size / sse).
1.31 +// Returns 128.0 (kMaxPSNR) if sse is 0 (perfect match).
1.32 +double ComputePSNR(double sse, double size);
1.33 +
1.34 +// Computer Sum of Squared Error (SSE).
1.35 +// Pass this to ComputePSNR for final result.
1.36 +double ComputeSumSquareError(const uint8* org, const uint8* rec, int size);
1.37 +
1.38 +#ifdef __cplusplus
1.39 +} // extern "C"
1.40 +#endif
1.41 +
1.42 +#endif // UTIL_PSNR_H_ // NOLINT
