gecko/media/libyuv/util/psnr.h
Randell Jesup 5b18a38cd7 Bug 813645 - Move libyuv to media/libyuv r=glandium
--HG--
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2014-01-30 19:55:04 -05:00

40 lines
1.1 KiB
C

/*
* Copyright 2013 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.
*/
// Get PSNR for video sequence. Assuming RAW 4:2:0 Y:Cb:Cr format
#ifndef UTIL_PSNR_H_ // NOLINT
#define UTIL_PSNR_H_
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(INT_TYPES_DEFINED) && !defined(UINT8_TYPE_DEFINED)
typedef unsigned char uint8;
#define UINT8_TYPE_DEFINED
#endif
static const double kMaxPSNR = 128.0;
// PSNR formula: psnr = 10 * log10 (Peak Signal^2 * size / sse).
// Returns 128.0 (kMaxPSNR) if sse is 0 (perfect match).
double ComputePSNR(double sse, double size);
// Computer Sum of Squared Error (SSE).
// Pass this to ComputePSNR for final result.
double ComputeSumSquareError(const uint8* org, const uint8* rec, int size);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // UTIL_PSNR_H_ // NOLINT