Line data    Source code

       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           0 : static INLINE int vp9_is_valid_scale(const struct scale_factors *sf) {
      52           0 :   return sf->x_scale_fp != REF_INVALID_SCALE &&
      53           0 :          sf->y_scale_fp != REF_INVALID_SCALE;
      54             : }
      55             : 
      56           0 : static INLINE int vp9_is_scaled(const struct scale_factors *sf) {
      57           0 :   return vp9_is_valid_scale(sf) &&
      58           0 :          (sf->x_scale_fp != REF_NO_SCALE || sf->y_scale_fp != REF_NO_SCALE);
      59             : }
      60             : 
      61           0 : static INLINE int valid_ref_frame_size(int ref_width, int ref_height,
      62             :                                        int this_width, int this_height) {
      63           0 :   return 2 * this_width >= ref_width && 2 * this_height >= ref_height &&
      64           0 :          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_