media/libyuv/util/psnr.h@6474c204b198 (annotated)
media/libyuv/util/psnr.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright 2013 The LibYuv Project Authors. All rights reserved. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license |
| michael@0 | 5 | * that can be found in the LICENSE file in the root of the source |
| michael@0 | 6 | * tree. An additional intellectual property rights grant can be found |
| michael@0 | 7 | * in the file PATENTS. All contributing project authors may |
| michael@0 | 8 | * be found in the AUTHORS file in the root of the source tree. |
| michael@0 | 9 | */ |
| michael@0 | 10 | |
| michael@0 | 11 | // Get PSNR for video sequence. Assuming RAW 4:2:0 Y:Cb:Cr format |
| michael@0 | 12 | |
| michael@0 | 13 | #ifndef UTIL_PSNR_H_ // NOLINT |
| michael@0 | 14 | #define UTIL_PSNR_H_ |
| michael@0 | 15 | |
| michael@0 | 16 | #ifdef __cplusplus |
| michael@0 | 17 | extern "C" { |
| michael@0 | 18 | #endif |
| michael@0 | 19 | |
| michael@0 | 20 | #if !defined(INT_TYPES_DEFINED) && !defined(UINT8_TYPE_DEFINED) |
| michael@0 | 21 | typedef unsigned char uint8; |
| michael@0 | 22 | #define UINT8_TYPE_DEFINED |
| michael@0 | 23 | #endif |
| michael@0 | 24 | |
| michael@0 | 25 | static const double kMaxPSNR = 128.0; |
| michael@0 | 26 | |
| michael@0 | 27 | // PSNR formula: psnr = 10 * log10 (Peak Signal^2 * size / sse). |
| michael@0 | 28 | // Returns 128.0 (kMaxPSNR) if sse is 0 (perfect match). |
| michael@0 | 29 | double ComputePSNR(double sse, double size); |
| michael@0 | 30 | |
| michael@0 | 31 | // Computer Sum of Squared Error (SSE). |
| michael@0 | 32 | // Pass this to ComputePSNR for final result. |
| michael@0 | 33 | double ComputeSumSquareError(const uint8* org, const uint8* rec, int size); |
| michael@0 | 34 | |
| michael@0 | 35 | #ifdef __cplusplus |
| michael@0 | 36 | } // extern "C" |
| michael@0 | 37 | #endif |
| michael@0 | 38 | |
| michael@0 | 39 | #endif // UTIL_PSNR_H_ // NOLINT |
