| /* |
| * Copyright (c) 2021, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 3-Clause Clear License |
| * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear |
| * License was not distributed with this source code in the LICENSE file, you |
| * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. If the |
| * Alliance for Open Media Patent License 1.0 was not distributed with this |
| * source code in the PATENTS file, you can obtain it at |
| * aomedia.org/license/patent-license/. |
| */ |
| |
| #ifndef AOM_AOM_DSP_AOM_FILTER_H_ |
| #define AOM_AOM_DSP_AOM_FILTER_H_ |
| |
| #include "aom/aom_integer.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define FILTER_BITS 7 |
| |
| #define SUBPEL_BITS 4 |
| #define SUBPEL_MASK ((1 << SUBPEL_BITS) - 1) |
| #define SUBPEL_SHIFTS (1 << SUBPEL_BITS) |
| #define SUBPEL_TAPS 8 |
| |
| #define SCALE_SUBPEL_BITS 10 |
| #define SCALE_SUBPEL_SHIFTS (1 << SCALE_SUBPEL_BITS) |
| #define SCALE_SUBPEL_MASK (SCALE_SUBPEL_SHIFTS - 1) |
| #define SCALE_EXTRA_BITS (SCALE_SUBPEL_BITS - SUBPEL_BITS) |
| #define SCALE_EXTRA_OFF ((1 << SCALE_EXTRA_BITS) / 2) |
| |
| #define RS_SUBPEL_BITS 6 |
| #define RS_SUBPEL_MASK ((1 << RS_SUBPEL_BITS) - 1) |
| #define RS_SCALE_SUBPEL_BITS 14 |
| #define RS_SCALE_SUBPEL_MASK ((1 << RS_SCALE_SUBPEL_BITS) - 1) |
| #define RS_SCALE_EXTRA_BITS (RS_SCALE_SUBPEL_BITS - RS_SUBPEL_BITS) |
| #define RS_SCALE_EXTRA_OFF (1 << (RS_SCALE_EXTRA_BITS - 1)) |
| |
| typedef int16_t InterpKernel[SUBPEL_TAPS]; |
| |
| #define BIL_SUBPEL_BITS 3 |
| #define BIL_SUBPEL_SHIFTS (1 << BIL_SUBPEL_BITS) |
| |
| // 2 tap bilinear filters |
| static const uint8_t bilinear_filters_2t[BIL_SUBPEL_SHIFTS][2] = { |
| { 128, 0 }, { 112, 16 }, { 96, 32 }, { 80, 48 }, |
| { 64, 64 }, { 48, 80 }, { 32, 96 }, { 16, 112 }, |
| }; |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AOM_DSP_AOM_FILTER_H_ |