1 /* 2 * Copyright (c) 2011 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_FILTER_H_ 12 #define VP9_COMMON_VP9_FILTER_H_ 13 14 #include "vpx_config.h" 15 #include "vpx/vpx_integer.h" 16 17 #define SUBPEL_BITS 4 18 #define SUBPEL_MASK ((1 << SUBPEL_BITS) - 1) 19 #define SUBPEL_SHIFTS (1 << SUBPEL_BITS) 20 #define SUBPEL_TAPS 8 21 22 extern const int16_t vp9_bilinear_filters[SUBPEL_SHIFTS][SUBPEL_TAPS]; 23 extern const int16_t vp9_sub_pel_filters_6[SUBPEL_SHIFTS][SUBPEL_TAPS]; 24 extern const int16_t vp9_sub_pel_filters_8[SUBPEL_SHIFTS][SUBPEL_TAPS]; 25 extern const int16_t vp9_sub_pel_filters_8s[SUBPEL_SHIFTS][SUBPEL_TAPS]; 26 extern const int16_t vp9_sub_pel_filters_8lp[SUBPEL_SHIFTS][SUBPEL_TAPS]; 27 28 // The VP9_BILINEAR_FILTERS_2TAP macro returns a pointer to the bilinear 29 // filter kernel as a 2 tap filter. 30 #define BILINEAR_FILTERS_2TAP(x) \ 31 (vp9_bilinear_filters[(x)] + SUBPEL_TAPS/2 - 1) 32 33 #endif // VP9_COMMON_VP9_FILTER_H_ 34
