The Tor Browser / file comparison
comparison: media/libvpx/vp8/encoder/psnr.c
media/libvpx/vp8/encoder/psnr.c
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
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| -1:000000000000 | 0:3c2c237a3782 |
|---|---|
| 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 | |
| 12 #include "vpx_scale/yv12config.h" | |
| 13 #include "math.h" | |
| 14 #include "vp8/common/systemdependent.h" /* for vp8_clear_system_state() */ | |
| 15 | |
| 16 #define MAX_PSNR 100 | |
| 17 | |
| 18 double vp8_mse2psnr(double Samples, double Peak, double Mse) | |
| 19 { | |
| 20 double psnr; | |
| 21 | |
| 22 if ((double)Mse > 0.0) | |
| 23 psnr = 10.0 * log10(Peak * Peak * Samples / Mse); | |
| 24 else | |
| 25 psnr = MAX_PSNR; /* Limit to prevent / 0 */ | |
| 26 | |
| 27 if (psnr > MAX_PSNR) | |
| 28 psnr = MAX_PSNR; | |
| 29 | |
| 30 return psnr; | |
| 31 } |
