25 lines
727 B
C
25 lines
727 B
C
/*
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* Copyright (c) 2014 The WebM 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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#include <math.h>
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#include "vpx/internal/vpx_psnr.h"
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#define MAX_PSNR 100.0
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double vpx_sse_to_psnr(double samples, double peak, double sse) {
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if (sse > 0.0) {
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const double psnr = 10.0 * log10(samples * peak * peak / sse);
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return psnr > MAX_PSNR ? MAX_PSNR : psnr;
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} else {
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return MAX_PSNR;
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}
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}
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