1 /* 2 * Copyright (c) 2014 The WebM 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 VP9_ENCODER_VP9_SSIM_H_ 12 #define VP9_ENCODER_VP9_SSIM_H_ 13 14 #ifdef __cplusplus 15 extern "C" { 16 #endif 17 18 #include "vpx_scale/yv12config.h" 19 20 // metrics used for calculating ssim, ssim2, dssim, and ssimc 21 typedef struct { 22 // source sum ( over 8x8 region ) 23 uint64_t sum_s; 24 25 // reference sum (over 8x8 region ) 26 uint64_t sum_r; 27 28 // source sum squared ( over 8x8 region ) 29 uint64_t sum_sq_s; 30 31 // reference sum squared (over 8x8 region ) 32 uint64_t sum_sq_r; 33 34 // sum of source times reference (over 8x8 region) 35 uint64_t sum_sxr; 36 37 // calculated ssim score between source and reference 38 double ssim; 39 } Ssimv; 40 41 // metrics collected on a frame basis 42 typedef struct { 43 // ssim consistency error metric ( see code for explanation ) 44 double ssimc; 45 46 // standard ssim 47 double ssim; 48 49 // revised ssim ( see code for explanation) 50 double ssim2; 51 52 // ssim restated as an error metric like sse 53 double dssim; 54 55 // dssim converted to decibels 56 double dssimd; 57 58 // ssimc converted to decibels 59 double ssimcd; 60 } Metrics; 61 62 double vp9_get_ssim_metrics(uint8_t *img1, int img1_pitch, uint8_t *img2, 63 int img2_pitch, int width, int height, Ssimv *sv2, 64 Metrics *m, int do_inconsistency); 65 66 double vp9_calc_ssim(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest, 67 double *weight); 68 69 double vp9_calc_ssimg(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest, 70 double *ssim_y, double *ssim_u, double *ssim_v); 71 72 double vp9_calc_fastssim(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest, 73 double *ssim_y, double *ssim_u, double *ssim_v); 74 75 double vp9_psnrhvs(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest, 76 double *ssim_y, double *ssim_u, double *ssim_v); 77 78 #if CONFIG_VP9_HIGHBITDEPTH 79 double vp9_highbd_calc_ssim(YV12_BUFFER_CONFIG *source, 80 YV12_BUFFER_CONFIG *dest, 81 double *weight, 82 unsigned int bd); 83 84 double vp9_highbd_calc_ssimg(YV12_BUFFER_CONFIG *source, 85 YV12_BUFFER_CONFIG *dest, 86 double *ssim_y, 87 double *ssim_u, 88 double *ssim_v, 89 unsigned int bd); 90 #endif // CONFIG_VP9_HIGHBITDEPTH 91 92 #ifdef __cplusplus 93 } // extern "C" 94 #endif 95 96 #endif // VP9_ENCODER_VP9_SSIM_H_ 97