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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#ifndef AOM_DSP_SSIM_H_
#define AOM_DSP_SSIM_H_
#define MAX_SSIM_DB 100.0;
#ifdef __cplusplus
extern "C" {
#endif
#include "./aom_config.h"
#include "aom_scale/yv12config.h"
// metrics used for calculating ssim, ssim2, dssim, and ssimc
typedef struct {
// source sum ( over 8x8 region )
uint32_t sum_s;
// reference sum (over 8x8 region )
uint32_t sum_r;
// source sum squared ( over 8x8 region )
uint32_t sum_sq_s;
// reference sum squared (over 8x8 region )
uint32_t sum_sq_r;
// sum of source times reference (over 8x8 region)
uint32_t sum_sxr;
// calculated ssim score between source and reference
double ssim;
} Ssimv;
// metrics collected on a frame basis
typedef struct {
// ssim consistency error metric ( see code for explanation )
double ssimc;
// standard ssim
double ssim;
// revised ssim ( see code for explanation)
double ssim2;
// ssim restated as an error metric like sse
double dssim;
// dssim converted to decibels
double dssimd;
// ssimc converted to decibels
double ssimcd;
} Metrics;
double aom_get_ssim_metrics(uint8_t *img1, int img1_pitch, uint8_t *img2,
int img2_pitch, int width, int height, Ssimv *sv2,
Metrics *m, int do_inconsistency);
double aom_calc_ssim(const YV12_BUFFER_CONFIG *source,
const YV12_BUFFER_CONFIG *dest, double *weight);
double aom_calc_fastssim(const YV12_BUFFER_CONFIG *source,
const YV12_BUFFER_CONFIG *dest, double *ssim_y,
double *ssim_u, double *ssim_v, uint32_t bd,
uint32_t in_bd);
#if CONFIG_HIGHBITDEPTH
double aom_highbd_calc_ssim(const YV12_BUFFER_CONFIG *source,
const YV12_BUFFER_CONFIG *dest, double *weight,
uint32_t bd, uint32_t in_bd);
#endif // CONFIG_HIGHBITDEPTH
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_DSP_SSIM_H_
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