The Tor Browser: media/libyuv/util/psnr.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  *  Copyright 2013 The LibYuv 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  */

    11 // Get PSNR for video sequence. Assuming RAW 4:2:0 Y:Cb:Cr format

    13 #ifndef UTIL_PSNR_H_  // NOLINT

    14 #define UTIL_PSNR_H_

    16 #ifdef __cplusplus

    17 extern "C" {

    18 #endif

    20 #if !defined(INT_TYPES_DEFINED) && !defined(UINT8_TYPE_DEFINED)

    21 typedef unsigned char uint8;

    22 #define UINT8_TYPE_DEFINED

    23 #endif

    25 static const double kMaxPSNR = 128.0;

    27 // PSNR formula: psnr = 10 * log10 (Peak Signal^2 * size / sse).

    28 // Returns 128.0 (kMaxPSNR) if sse is 0 (perfect match).

    29 double ComputePSNR(double sse, double size);

    31 // Computer Sum of Squared Error (SSE).

    32 // Pass this to ComputePSNR for final result.

    33 double ComputeSumSquareError(const uint8* org, const uint8* rec, int size);

    35 #ifdef __cplusplus

    36 }  // extern "C"

    37 #endif

    39 #endif  // UTIL_PSNR_H_  // NOLINT

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