1/* 2 * Copyright 2011 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 */ 10 11#ifndef INCLUDE_LIBYUV_COMPARE_H_ // NOLINT 12#define INCLUDE_LIBYUV_COMPARE_H_ 13 14#include "libyuv/basic_types.h" 15 16#ifdef __cplusplus 17namespace libyuv { 18extern "C" { 19#endif 20 21// Compute a hash for specified memory. Seed of 5381 recommended. 22LIBYUV_API 23uint32 HashDjb2(const uint8* src, uint64 count, uint32 seed); 24 25// Sum Square Error - used to compute Mean Square Error or PSNR. 26LIBYUV_API 27uint64 ComputeSumSquareError(const uint8* src_a, 28 const uint8* src_b, int count); 29 30LIBYUV_API 31uint64 ComputeSumSquareErrorPlane(const uint8* src_a, int stride_a, 32 const uint8* src_b, int stride_b, 33 int width, int height); 34 35static const int kMaxPsnr = 128; 36 37LIBYUV_API 38double SumSquareErrorToPsnr(uint64 sse, uint64 count); 39 40LIBYUV_API 41double CalcFramePsnr(const uint8* src_a, int stride_a, 42 const uint8* src_b, int stride_b, 43 int width, int height); 44 45LIBYUV_API 46double I420Psnr(const uint8* src_y_a, int stride_y_a, 47 const uint8* src_u_a, int stride_u_a, 48 const uint8* src_v_a, int stride_v_a, 49 const uint8* src_y_b, int stride_y_b, 50 const uint8* src_u_b, int stride_u_b, 51 const uint8* src_v_b, int stride_v_b, 52 int width, int height); 53 54LIBYUV_API 55double CalcFrameSsim(const uint8* src_a, int stride_a, 56 const uint8* src_b, int stride_b, 57 int width, int height); 58 59LIBYUV_API 60double I420Ssim(const uint8* src_y_a, int stride_y_a, 61 const uint8* src_u_a, int stride_u_a, 62 const uint8* src_v_a, int stride_v_a, 63 const uint8* src_y_b, int stride_y_b, 64 const uint8* src_u_b, int stride_u_b, 65 const uint8* src_v_b, int stride_v_b, 66 int width, int height); 67 68#ifdef __cplusplus 69} // extern "C" 70} // namespace libyuv 71#endif 72 73#endif // INCLUDE_LIBYUV_COMPARE_H_ NOLINT 74