| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. 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 www.aomedia.org/license/patent. |
| */ |
| |
| #ifndef AOM_AV1_COMMON_FILTER_H_ |
| #define AOM_AV1_COMMON_FILTER_H_ |
| |
| #include <assert.h> |
| |
| #include "config/aom_config.h" |
| |
| #include "aom/aom_integer.h" |
| #include "aom_dsp/aom_filter.h" |
| #include "aom_ports/mem.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define MAX_FILTER_TAP 8 |
| |
| typedef enum ATTRIBUTE_PACKED { |
| EIGHTTAP_REGULAR, |
| EIGHTTAP_SMOOTH, |
| MULTITAP_SHARP, |
| BILINEAR, |
| INTERP_FILTERS_ALL, |
| SWITCHABLE_FILTERS = BILINEAR, |
| SWITCHABLE = SWITCHABLE_FILTERS + 1, /* the last switchable one */ |
| EXTRA_FILTERS = INTERP_FILTERS_ALL - SWITCHABLE_FILTERS, |
| } InterpFilter; |
| |
| enum { |
| USE_2_TAPS_ORIG = 0, // This is used in temporal filtering. |
| USE_2_TAPS, |
| USE_4_TAPS, |
| USE_8_TAPS, |
| } UENUM1BYTE(SUBPEL_SEARCH_TYPE); |
| |
| // Pack two InterpFilter's into a uint32_t: since there are at most 10 filters, |
| // we can use 16 bits for each and have more than enough space. This reduces |
| // argument passing and unifies the operation of setting a (pair of) filters. |
| typedef uint32_t InterpFilters; |
| static INLINE InterpFilter av1_extract_interp_filter(InterpFilters filters, |
| int x_filter) { |
| return (InterpFilter)((filters >> (x_filter ? 16 : 0)) & 0xf); |
| } |
| |
| static INLINE InterpFilters av1_make_interp_filters(InterpFilter y_filter, |
| InterpFilter x_filter) { |
| uint16_t y16 = y_filter & 0xf; |
| uint16_t x16 = x_filter & 0xf; |
| return y16 | ((uint32_t)x16 << 16); |
| } |
| |
| static INLINE InterpFilters av1_broadcast_interp_filter(InterpFilter filter) { |
| return av1_make_interp_filters(filter, filter); |
| } |
| |
| static INLINE InterpFilter av1_unswitchable_filter(InterpFilter filter) { |
| return filter == SWITCHABLE ? EIGHTTAP_REGULAR : filter; |
| } |
| |
| /* (1 << LOG_SWITCHABLE_FILTERS) > SWITCHABLE_FILTERS */ |
| #define LOG_SWITCHABLE_FILTERS 2 |
| |
| #define MAX_SUBPEL_TAPS 12 |
| #define SWITCHABLE_FILTER_CONTEXTS ((SWITCHABLE_FILTERS + 1) * 4) |
| #define INTER_FILTER_COMP_OFFSET (SWITCHABLE_FILTERS + 1) |
| #define INTER_FILTER_DIR_OFFSET ((SWITCHABLE_FILTERS + 1) * 2) |
| |
| typedef struct InterpFilterParams { |
| const int16_t *filter_ptr; |
| uint16_t taps; |
| uint16_t subpel_shifts; |
| InterpFilter interp_filter; |
| } InterpFilterParams; |
| |
| DECLARE_ALIGNED(256, static const InterpKernel, |
| av1_bilinear_filters[SUBPEL_SHIFTS]) = { |
| { 0, 0, 0, 128, 0, 0, 0, 0 }, { 0, 0, 0, 120, 8, 0, 0, 0 }, |
| { 0, 0, 0, 112, 16, 0, 0, 0 }, { 0, 0, 0, 104, 24, 0, 0, 0 }, |
| { 0, 0, 0, 96, 32, 0, 0, 0 }, { 0, 0, 0, 88, 40, 0, 0, 0 }, |
| { 0, 0, 0, 80, 48, 0, 0, 0 }, { 0, 0, 0, 72, 56, 0, 0, 0 }, |
| { 0, 0, 0, 64, 64, 0, 0, 0 }, { 0, 0, 0, 56, 72, 0, 0, 0 }, |
| { 0, 0, 0, 48, 80, 0, 0, 0 }, { 0, 0, 0, 40, 88, 0, 0, 0 }, |
| { 0, 0, 0, 32, 96, 0, 0, 0 }, { 0, 0, 0, 24, 104, 0, 0, 0 }, |
| { 0, 0, 0, 16, 112, 0, 0, 0 }, { 0, 0, 0, 8, 120, 0, 0, 0 } |
| }; |
| |
| DECLARE_ALIGNED(256, static const InterpKernel, |
| av1_sub_pel_filters_8[SUBPEL_SHIFTS]) = { |
| { 0, 0, 0, 128, 0, 0, 0, 0 }, { 0, 2, -6, 126, 8, -2, 0, 0 }, |
| { 0, 2, -10, 122, 18, -4, 0, 0 }, { 0, 2, -12, 116, 28, -8, 2, 0 }, |
| { 0, 2, -14, 110, 38, -10, 2, 0 }, { 0, 2, -14, 102, 48, -12, 2, 0 }, |
| { 0, 2, -16, 94, 58, -12, 2, 0 }, { 0, 2, -14, 84, 66, -12, 2, 0 }, |
| { 0, 2, -14, 76, 76, -14, 2, 0 }, { 0, 2, -12, 66, 84, -14, 2, 0 }, |
| { 0, 2, -12, 58, 94, -16, 2, 0 }, { 0, 2, -12, 48, 102, -14, 2, 0 }, |
| { 0, 2, -10, 38, 110, -14, 2, 0 }, { 0, 2, -8, 28, 116, -12, 2, 0 }, |
| { 0, 0, -4, 18, 122, -10, 2, 0 }, { 0, 0, -2, 8, 126, -6, 2, 0 } |
| }; |
| |
| DECLARE_ALIGNED(256, static const InterpKernel, |
| av1_sub_pel_filters_8sharp[SUBPEL_SHIFTS]) = { |
| { 0, 0, 0, 128, 0, 0, 0, 0 }, { -2, 2, -6, 126, 8, -2, 2, 0 }, |
| { -2, 6, -12, 124, 16, -6, 4, -2 }, { -2, 8, -18, 120, 26, -10, 6, -2 }, |
| { -4, 10, -22, 116, 38, -14, 6, -2 }, { -4, 10, -22, 108, 48, -18, 8, -2 }, |
| { -4, 10, -24, 100, 60, -20, 8, -2 }, { -4, 10, -24, 90, 70, -22, 10, -2 }, |
| { -4, 12, -24, 80, 80, -24, 12, -4 }, { -2, 10, -22, 70, 90, -24, 10, -4 }, |
| { -2, 8, -20, 60, 100, -24, 10, -4 }, { -2, 8, -18, 48, 108, -22, 10, -4 }, |
| { -2, 6, -14, 38, 116, -22, 10, -4 }, { -2, 6, -10, 26, 120, -18, 8, -2 }, |
| { -2, 4, -6, 16, 124, -12, 6, -2 }, { 0, 2, -2, 8, 126, -6, 2, -2 } |
| }; |
| |
| DECLARE_ALIGNED(256, static const InterpKernel, |
| av1_sub_pel_filters_8smooth[SUBPEL_SHIFTS]) = { |
| { 0, 0, 0, 128, 0, 0, 0, 0 }, { 0, 2, 28, 62, 34, 2, 0, 0 }, |
| { 0, 0, 26, 62, 36, 4, 0, 0 }, { 0, 0, 22, 62, 40, 4, 0, 0 }, |
| { 0, 0, 20, 60, 42, 6, 0, 0 }, { 0, 0, 18, 58, 44, 8, 0, 0 }, |
| { 0, 0, 16, 56, 46, 10, 0, 0 }, { 0, -2, 16, 54, 48, 12, 0, 0 }, |
| { 0, -2, 14, 52, 52, 14, -2, 0 }, { 0, 0, 12, 48, 54, 16, -2, 0 }, |
| { 0, 0, 10, 46, 56, 16, 0, 0 }, { 0, 0, 8, 44, 58, 18, 0, 0 }, |
| { 0, 0, 6, 42, 60, 20, 0, 0 }, { 0, 0, 4, 40, 62, 22, 0, 0 }, |
| { 0, 0, 4, 36, 62, 26, 0, 0 }, { 0, 0, 2, 34, 62, 28, 2, 0 } |
| }; |
| |
| static const InterpFilterParams |
| av1_interp_filter_params_list[SWITCHABLE_FILTERS + 1] = { |
| { (const int16_t *)av1_sub_pel_filters_8, SUBPEL_TAPS, SUBPEL_SHIFTS, |
| EIGHTTAP_REGULAR }, |
| { (const int16_t *)av1_sub_pel_filters_8smooth, SUBPEL_TAPS, |
| SUBPEL_SHIFTS, EIGHTTAP_SMOOTH }, |
| { (const int16_t *)av1_sub_pel_filters_8sharp, SUBPEL_TAPS, SUBPEL_SHIFTS, |
| MULTITAP_SHARP }, |
| { (const int16_t *)av1_bilinear_filters, SUBPEL_TAPS, SUBPEL_SHIFTS, |
| BILINEAR } |
| }; |
| |
| // A special 2-tap bilinear filter for IntraBC chroma. IntraBC uses full pixel |
| // MV for luma. If sub-sampling exists, chroma may possibly use half-pel MV. |
| DECLARE_ALIGNED(256, static const int16_t, av1_intrabc_bilinear_filter[2]) = { |
| 64, |
| 64, |
| }; |
| |
| static const InterpFilterParams av1_intrabc_filter_params = { |
| av1_intrabc_bilinear_filter, 2, 0, BILINEAR |
| }; |
| |
| DECLARE_ALIGNED(256, static const InterpKernel, |
| av1_sub_pel_filters_4[SUBPEL_SHIFTS]) = { |
| { 0, 0, 0, 128, 0, 0, 0, 0 }, { 0, 0, -4, 126, 8, -2, 0, 0 }, |
| { 0, 0, -8, 122, 18, -4, 0, 0 }, { 0, 0, -10, 116, 28, -6, 0, 0 }, |
| { 0, 0, -12, 110, 38, -8, 0, 0 }, { 0, 0, -12, 102, 48, -10, 0, 0 }, |
| { 0, 0, -14, 94, 58, -10, 0, 0 }, { 0, 0, -12, 84, 66, -10, 0, 0 }, |
| { 0, 0, -12, 76, 76, -12, 0, 0 }, { 0, 0, -10, 66, 84, -12, 0, 0 }, |
| { 0, 0, -10, 58, 94, -14, 0, 0 }, { 0, 0, -10, 48, 102, -12, 0, 0 }, |
| { 0, 0, -8, 38, 110, -12, 0, 0 }, { 0, 0, -6, 28, 116, -10, 0, 0 }, |
| { 0, 0, -4, 18, 122, -8, 0, 0 }, { 0, 0, -2, 8, 126, -4, 0, 0 } |
| }; |
| DECLARE_ALIGNED(256, static const InterpKernel, |
| av1_sub_pel_filters_4smooth[SUBPEL_SHIFTS]) = { |
| { 0, 0, 0, 128, 0, 0, 0, 0 }, { 0, 0, 30, 62, 34, 2, 0, 0 }, |
| { 0, 0, 26, 62, 36, 4, 0, 0 }, { 0, 0, 22, 62, 40, 4, 0, 0 }, |
| { 0, 0, 20, 60, 42, 6, 0, 0 }, { 0, 0, 18, 58, 44, 8, 0, 0 }, |
| { 0, 0, 16, 56, 46, 10, 0, 0 }, { 0, 0, 14, 54, 48, 12, 0, 0 }, |
| { 0, 0, 12, 52, 52, 12, 0, 0 }, { 0, 0, 12, 48, 54, 14, 0, 0 }, |
| { 0, 0, 10, 46, 56, 16, 0, 0 }, { 0, 0, 8, 44, 58, 18, 0, 0 }, |
| { 0, 0, 6, 42, 60, 20, 0, 0 }, { 0, 0, 4, 40, 62, 22, 0, 0 }, |
| { 0, 0, 4, 36, 62, 26, 0, 0 }, { 0, 0, 2, 34, 62, 30, 0, 0 } |
| }; |
| |
| // For w<=4, MULTITAP_SHARP is the same as EIGHTTAP_REGULAR |
| static const InterpFilterParams av1_interp_4tap[SWITCHABLE_FILTERS + 1] = { |
| { (const int16_t *)av1_sub_pel_filters_4, SUBPEL_TAPS, SUBPEL_SHIFTS, |
| EIGHTTAP_REGULAR }, |
| { (const int16_t *)av1_sub_pel_filters_4smooth, SUBPEL_TAPS, SUBPEL_SHIFTS, |
| EIGHTTAP_SMOOTH }, |
| { (const int16_t *)av1_sub_pel_filters_4, SUBPEL_TAPS, SUBPEL_SHIFTS, |
| EIGHTTAP_REGULAR }, |
| { (const int16_t *)av1_bilinear_filters, SUBPEL_TAPS, SUBPEL_SHIFTS, |
| BILINEAR }, |
| }; |
| |
| static INLINE const InterpFilterParams * |
| av1_get_interp_filter_params_with_block_size(const InterpFilter interp_filter, |
| const int w) { |
| if (w <= 4) return &av1_interp_4tap[interp_filter]; |
| return &av1_interp_filter_params_list[interp_filter]; |
| } |
| |
| static INLINE const InterpFilterParams *get_4tap_interp_filter_params( |
| const InterpFilter interp_filter) { |
| return &av1_interp_4tap[interp_filter]; |
| } |
| |
| static INLINE const int16_t *av1_get_interp_filter_kernel( |
| const InterpFilter interp_filter, int subpel_search) { |
| assert(subpel_search >= USE_2_TAPS); |
| return (subpel_search == USE_2_TAPS) |
| ? av1_interp_4tap[BILINEAR].filter_ptr |
| : ((subpel_search == USE_4_TAPS) |
| ? av1_interp_4tap[interp_filter].filter_ptr |
| : av1_interp_filter_params_list[interp_filter].filter_ptr); |
| } |
| |
| static INLINE const int16_t *av1_get_interp_filter_subpel_kernel( |
| const InterpFilterParams *const filter_params, const int subpel) { |
| return filter_params->filter_ptr + filter_params->taps * subpel; |
| } |
| |
| static INLINE const InterpFilterParams *av1_get_filter(int subpel_search) { |
| assert(subpel_search >= USE_2_TAPS); |
| |
| switch (subpel_search) { |
| case USE_2_TAPS: return get_4tap_interp_filter_params(BILINEAR); |
| case USE_4_TAPS: return get_4tap_interp_filter_params(EIGHTTAP_REGULAR); |
| case USE_8_TAPS: return &av1_interp_filter_params_list[EIGHTTAP_REGULAR]; |
| default: assert(0); return NULL; |
| } |
| } |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AV1_COMMON_FILTER_H_ |