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e424a9de7a
BUG=204 TESTED=build\gyp_chromium -fninja -G msvs_version=2012 --depth=. libyuv_test.gyp & out\Release\psnr locally tested. Review URL: https://webrtc-codereview.appspot.com/1216005 git-svn-id: http://libyuv.googlecode.com/svn/trunk@612 16f28f9a-4ce2-e073-06de-1de4eb20be90
29 lines
943 B
C
29 lines
943 B
C
/*
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* Copyright 2013 The LibYuv Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// Get PSNR for video sequence. Assuming RAW 4:2:0 Y:Cb:Cr format
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#ifndef UTIL_PSNR_H_
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#define UTIL_PSNR_H_
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typedef unsigned char uint8;
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static const double kMaxPSNR = 128.0;
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// PSNR formula: psnr = 10 * log10 (Peak Signal^2 * size / sse).
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// Returns 128.0 (kMaxPSNR) if sse is 0 (perfect match).
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double ComputePSNR(double sse, double size);
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// Computer Sum of Squared Error (SSE).
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// Pass this to ComputePSNR for final result.
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double ComputeSumSquareError(const uint8* org, const uint8* rec, int size);
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#endif // UTIL_PSNR_H_
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