/*
  *  Copyright 2011 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef INCLUDE_LIBYUV_COMPARE_H_  // NOLINT
 #define INCLUDE_LIBYUV_COMPARE_H_
 
 #include "libyuv/basic_types.h"
 
 #ifdef __cplusplus
 namespace libyuv {
 extern "C" {
 #endif
 
 // Compute a hash for specified memory.  Seed of 5381 recommended.
 uint32 HashDjb2(const uint8* src, uint64 count, uint32 seed);
 
 // Sum Square Error - used to compute Mean Square Error or PSNR
 uint64 ComputeSumSquareError(const uint8* src_a,
                              const uint8* src_b, int count);
 
 uint64 ComputeSumSquareErrorPlane(const uint8* src_a, int stride_a,
                                   const uint8* src_b, int stride_b,
                                   int width, int height);
 
 static const int kMaxPsnr = 128;
 
 double SumSquareErrorToPsnr(uint64 sse, uint64 count);
 
 double CalcFramePsnr(const uint8* src_a, int stride_a,
                      const uint8* src_b, int stride_b,
                      int width, int height);
 
 double I420Psnr(const uint8* src_y_a, int stride_y_a,
                 const uint8* src_u_a, int stride_u_a,
                 const uint8* src_v_a, int stride_v_a,
                 const uint8* src_y_b, int stride_y_b,
                 const uint8* src_u_b, int stride_u_b,
                 const uint8* src_v_b, int stride_v_b,
                 int width, int height);
 
 double CalcFrameSsim(const uint8* src_a, int stride_a,
                      const uint8* src_b, int stride_b,
                      int width, int height);
 
 double I420Ssim(const uint8* src_y_a, int stride_y_a,
                 const uint8* src_u_a, int stride_u_a,
                 const uint8* src_v_a, int stride_v_a,
                 const uint8* src_y_b, int stride_y_b,
                 const uint8* src_u_b, int stride_u_b,
                 const uint8* src_v_b, int stride_v_b,
                 int width, int height);
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif
 
 #endif  // INCLUDE_LIBYUV_COMPARE_H_  NOLINT