| /* |
| * 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_CONVOLVE_H_ |
| #define AOM_AV1_COMMON_CONVOLVE_H_ |
| #include "av1/common/filter.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| typedef uint16_t CONV_BUF_TYPE; |
| typedef struct ConvolveParams { |
| int do_average; |
| CONV_BUF_TYPE *dst; |
| int dst_stride; |
| int round_0; |
| int round_1; |
| int plane; |
| int is_compound; |
| int use_dist_wtd_comp_avg; |
| int fwd_offset; |
| int bck_offset; |
| } ConvolveParams; |
| |
| #define ROUND0_BITS 3 |
| #define COMPOUND_ROUND1_BITS 7 |
| #define WIENER_ROUND0_BITS 3 |
| |
| #define WIENER_CLAMP_LIMIT(r0, bd) (1 << ((bd) + 1 + FILTER_BITS - r0)) |
| |
| typedef void (*aom_convolve_fn_t)(const uint8_t *src, int src_stride, |
| uint8_t *dst, int dst_stride, int w, int h, |
| const InterpFilterParams *filter_params_x, |
| const InterpFilterParams *filter_params_y, |
| const int subpel_x_qn, const int subpel_y_qn, |
| ConvolveParams *conv_params); |
| |
| typedef void (*aom_highbd_convolve_fn_t)( |
| const uint16_t *src, int src_stride, uint16_t *dst, int dst_stride, int w, |
| int h, const InterpFilterParams *filter_params_x, |
| const InterpFilterParams *filter_params_y, const int subpel_x_qn, |
| const int subpel_y_qn, ConvolveParams *conv_params, int bd); |
| |
| struct AV1Common; |
| struct scale_factors; |
| |
| void av1_convolve_2d_facade(const uint8_t *src, int src_stride, uint8_t *dst, |
| int dst_stride, int w, int h, |
| const InterpFilterParams *interp_filters[2], |
| const int subpel_x_qn, int x_step_q4, |
| const int subpel_y_qn, int y_step_q4, int scaled, |
| ConvolveParams *conv_params); |
| |
| static INLINE ConvolveParams get_conv_params_no_round(int cmp_index, int plane, |
| CONV_BUF_TYPE *dst, |
| int dst_stride, |
| int is_compound, int bd) { |
| ConvolveParams conv_params; |
| assert(IMPLIES(cmp_index, is_compound)); |
| |
| conv_params.is_compound = is_compound; |
| conv_params.use_dist_wtd_comp_avg = 0; |
| conv_params.round_0 = ROUND0_BITS; |
| conv_params.round_1 = is_compound ? COMPOUND_ROUND1_BITS |
| : 2 * FILTER_BITS - conv_params.round_0; |
| #if CONFIG_AV1_HIGHBITDEPTH |
| const int intbufrange = bd + FILTER_BITS - conv_params.round_0 + 2; |
| assert(IMPLIES(bd < 12, intbufrange <= 16)); |
| if (intbufrange > 16) { |
| conv_params.round_0 += intbufrange - 16; |
| if (!is_compound) conv_params.round_1 -= intbufrange - 16; |
| } |
| #else |
| (void)bd; |
| #endif // CONFIG_AV1_HIGHBITDEPTH |
| // TODO(yunqing): The following dst should only be valid while |
| // is_compound = 1; |
| conv_params.dst = dst; |
| conv_params.dst_stride = dst_stride; |
| conv_params.plane = plane; |
| |
| // By default, set do average to 1 if this is the second single prediction |
| // in a compound mode. |
| conv_params.do_average = cmp_index; |
| return conv_params; |
| } |
| |
| static INLINE ConvolveParams get_conv_params(int do_average, int plane, |
| int bd) { |
| return get_conv_params_no_round(do_average, plane, NULL, 0, 0, bd); |
| } |
| |
| static INLINE ConvolveParams get_conv_params_wiener(int bd) { |
| ConvolveParams conv_params; |
| (void)bd; |
| conv_params.do_average = 0; |
| conv_params.is_compound = 0; |
| conv_params.round_0 = WIENER_ROUND0_BITS; |
| conv_params.round_1 = 2 * FILTER_BITS - conv_params.round_0; |
| const int intbufrange = bd + FILTER_BITS - conv_params.round_0 + 2; |
| assert(IMPLIES(bd < 12, intbufrange <= 16)); |
| if (intbufrange > 16) { |
| conv_params.round_0 += intbufrange - 16; |
| conv_params.round_1 -= intbufrange - 16; |
| } |
| conv_params.dst = NULL; |
| conv_params.dst_stride = 0; |
| conv_params.plane = 0; |
| return conv_params; |
| } |
| |
| void av1_highbd_convolve_2d_facade(const uint8_t *src8, int src_stride, |
| uint8_t *dst, int dst_stride, int w, int h, |
| const InterpFilterParams *interp_filters[2], |
| const int subpel_x_qn, int x_step_q4, |
| const int subpel_y_qn, int y_step_q4, |
| int scaled, ConvolveParams *conv_params, |
| int bd); |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AV1_COMMON_CONVOLVE_H_ |