/*
 *  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
