1 /* 2 * Copyright (c) 2013 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_COMMON_VP9_SCALE_H_ 12 #define VP9_COMMON_VP9_SCALE_H_ 13 14 #include "vp9/common/vp9_mv.h" 15 #include "vpx_dsp/vpx_convolve.h" 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 #define REF_SCALE_SHIFT 14 22 #define REF_NO_SCALE (1 << REF_SCALE_SHIFT) 23 #define REF_INVALID_SCALE -1 24 25 struct scale_factors { 26 int x_scale_fp; // horizontal fixed point scale factor 27 int y_scale_fp; // vertical fixed point scale factor 28 int x_step_q4; 29 int y_step_q4; 30 31 int (*scale_value_x)(int val, const struct scale_factors *sf); 32 int (*scale_value_y)(int val, const struct scale_factors *sf); 33 34 convolve_fn_t predict[2][2][2]; // horiz, vert, avg 35 #if CONFIG_VP9_HIGHBITDEPTH 36 highbd_convolve_fn_t highbd_predict[2][2][2]; // horiz, vert, avg 37 #endif 38 }; 39 40 MV32 vp9_scale_mv(const MV *mv, int x, int y, const struct scale_factors *sf); 41 42 #if CONFIG_VP9_HIGHBITDEPTH 43 void vp9_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w, 44 int other_h, int this_w, int this_h, 45 int use_high); 46 #else 47 void vp9_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w, 48 int other_h, int this_w, int this_h); 49 #endif 50 51 static INLINE int vp9_is_valid_scale(const struct scale_factors *sf) { 52 return sf->x_scale_fp != REF_INVALID_SCALE && 53 sf->y_scale_fp != REF_INVALID_SCALE; 54 } 55 56 static INLINE int vp9_is_scaled(const struct scale_factors *sf) { 57 return vp9_is_valid_scale(sf) && 58 (sf->x_scale_fp != REF_NO_SCALE || sf->y_scale_fp != REF_NO_SCALE); 59 } 60 61 static INLINE int valid_ref_frame_size(int ref_width, int ref_height, 62 int this_width, int this_height) { 63 return 2 * this_width >= ref_width && 2 * this_height >= ref_height && 64 this_width <= 16 * ref_width && this_height <= 16 * ref_height; 65 } 66 67 #ifdef __cplusplus 68 } // extern "C" 69 #endif 70 71 #endif // VP9_COMMON_VP9_SCALE_H_ 72
