1 /* 2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AOM_DSP_SSIM_H_ 13 #define AOM_AOM_DSP_SSIM_H_ 14 15 #define MAX_SSIM_DB 100.0; 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 #include "config/aom_config.h" 22 23 #include "aom_scale/yv12config.h" 24 25 // metrics used for calculating ssim, ssim2, dssim, and ssimc 26 typedef struct { 27 // source sum ( over 8x8 region ) 28 uint32_t sum_s; 29 30 // reference sum (over 8x8 region ) 31 uint32_t sum_r; 32 33 // source sum squared ( over 8x8 region ) 34 uint32_t sum_sq_s; 35 36 // reference sum squared (over 8x8 region ) 37 uint32_t sum_sq_r; 38 39 // sum of source times reference (over 8x8 region) 40 uint32_t sum_sxr; 41 42 // calculated ssim score between source and reference 43 double ssim; 44 } Ssimv; 45 46 // metrics collected on a frame basis 47 typedef struct { 48 // ssim consistency error metric ( see code for explanation ) 49 double ssimc; 50 51 // standard ssim 52 double ssim; 53 54 // revised ssim ( see code for explanation) 55 double ssim2; 56 57 // ssim restated as an error metric like sse 58 double dssim; 59 60 // dssim converted to decibels 61 double dssimd; 62 63 // ssimc converted to decibels 64 double ssimcd; 65 } Metrics; 66 67 double aom_get_ssim_metrics(uint8_t *img1, int img1_pitch, uint8_t *img2, 68 int img2_pitch, int width, int height, Ssimv *sv2, 69 Metrics *m, int do_inconsistency); 70 71 double aom_calc_ssim(const YV12_BUFFER_CONFIG *source, 72 const YV12_BUFFER_CONFIG *dest, double *weight); 73 74 double aom_calc_fastssim(const YV12_BUFFER_CONFIG *source, 75 const YV12_BUFFER_CONFIG *dest, double *ssim_y, 76 double *ssim_u, double *ssim_v, uint32_t bd, 77 uint32_t in_bd); 78 79 double aom_highbd_calc_ssim(const YV12_BUFFER_CONFIG *source, 80 const YV12_BUFFER_CONFIG *dest, double *weight, 81 uint32_t bd, uint32_t in_bd); 82 83 #ifdef __cplusplus 84 } // extern "C" 85 #endif 86 87 #endif // AOM_AOM_DSP_SSIM_H_ 88