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/*
* 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_
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