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comparison: media/libvpx/vp9/encoder/vp9_psnr.c
media/libvpx/vp9/encoder/vp9_psnr.c
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| -1:000000000000 | 0:bef965dfca56 |
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| 1 /* | |
| 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include <math.h> | |
| 12 | |
| 13 #include "vpx_scale/yv12config.h" | |
| 14 | |
| 15 #define MAX_PSNR 100 | |
| 16 | |
| 17 double vp9_mse2psnr(double samples, double peak, double mse) { | |
| 18 double psnr; | |
| 19 | |
| 20 if (mse > 0.0) | |
| 21 psnr = 10.0 * log10(peak * peak * samples / mse); | |
| 22 else | |
| 23 psnr = MAX_PSNR; // Limit to prevent / 0 | |
| 24 | |
| 25 if (psnr > MAX_PSNR) | |
| 26 psnr = MAX_PSNR; | |
| 27 | |
| 28 return psnr; | |
| 29 } |
