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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_RECONINTRA_H_
#define AOM_AV1_COMMON_RECONINTRA_H_
#include <stdlib.h>
#include "aom/aom_integer.h"
#include "av1/common/av1_common_int.h"
#include "av1/common/blockd.h"
#ifdef __cplusplus
extern "C" {
#endif
void av1_init_intra_predictors(void);
void av1_predict_intra_block_facade(const AV1_COMMON *cm, MACROBLOCKD *xd,
int plane, int blk_col, int blk_row,
TX_SIZE tx_size);
void av1_predict_intra_block(const MACROBLOCKD *xd, BLOCK_SIZE sb_size,
int enable_intra_edge_filter, int wpx, int hpx,
TX_SIZE tx_size, PREDICTION_MODE mode,
int angle_delta, int use_palette,
FILTER_INTRA_MODE filter_intra_mode,
const uint8_t *ref, int ref_stride, uint8_t *dst,
int dst_stride, int col_off, int row_off,
int plane);
// Mapping of interintra to intra mode for use in the intra component
static const PREDICTION_MODE interintra_to_intra_mode[INTERINTRA_MODES] = {
DC_PRED, V_PRED, H_PRED, SMOOTH_PRED
};
// Mapping of intra mode to the interintra mode
static const INTERINTRA_MODE intra_to_interintra_mode[INTRA_MODES] = {
II_DC_PRED, II_V_PRED, II_H_PRED, II_V_PRED, II_SMOOTH_PRED, II_V_PRED,
II_H_PRED, II_H_PRED, II_V_PRED, II_SMOOTH_PRED, II_SMOOTH_PRED
};
#define FILTER_INTRA_SCALE_BITS 4
static INLINE int av1_is_directional_mode(PREDICTION_MODE mode) {
return mode >= V_PRED && mode <= D67_PRED;
}
static INLINE int av1_is_diagonal_mode(PREDICTION_MODE mode) {
return mode >= D45_PRED && mode <= D67_PRED;
}
static INLINE int av1_use_angle_delta(BLOCK_SIZE bsize) {
return bsize >= BLOCK_8X8;
}
static INLINE int av1_allow_intrabc(const AV1_COMMON *const cm) {
return frame_is_intra_only(cm) && cm->features.allow_screen_content_tools &&
cm->features.allow_intrabc;
}
static INLINE int av1_filter_intra_allowed_bsize(const AV1_COMMON *const cm,
BLOCK_SIZE bs) {
if (!cm->seq_params->enable_filter_intra || bs == BLOCK_INVALID) return 0;
return block_size_wide[bs] <= 32 && block_size_high[bs] <= 32;
}
static INLINE int av1_filter_intra_allowed(const AV1_COMMON *const cm,
const MB_MODE_INFO *mbmi) {
return mbmi->mode == DC_PRED &&
mbmi->palette_mode_info.palette_size[0] == 0 &&
av1_filter_intra_allowed_bsize(cm, mbmi->bsize);
}
extern const int8_t av1_filter_intra_taps[FILTER_INTRA_MODES][8][8];
static const int16_t dr_intra_derivative[90] = {
// More evenly spread out angles and limited to 10-bit
// Values that are 0 will never be used
// Approx angle
0, 0, 0, //
1023, 0, 0, // 3, ...
547, 0, 0, // 6, ...
372, 0, 0, 0, 0, // 9, ...
273, 0, 0, // 14, ...
215, 0, 0, // 17, ...
178, 0, 0, // 20, ...
151, 0, 0, // 23, ... (113 & 203 are base angles)
132, 0, 0, // 26, ...
116, 0, 0, // 29, ...
102, 0, 0, 0, // 32, ...
90, 0, 0, // 36, ...
80, 0, 0, // 39, ...
71, 0, 0, // 42, ...
64, 0, 0, // 45, ... (45 & 135 are base angles)
57, 0, 0, // 48, ...
51, 0, 0, // 51, ...
45, 0, 0, 0, // 54, ...
40, 0, 0, // 58, ...
35, 0, 0, // 61, ...
31, 0, 0, // 64, ...
27, 0, 0, // 67, ... (67 & 157 are base angles)
23, 0, 0, // 70, ...
19, 0, 0, // 73, ...
15, 0, 0, 0, 0, // 76, ...
11, 0, 0, // 81, ...
7, 0, 0, // 84, ...
3, 0, 0, // 87, ...
};
// Get the shift (up-scaled by 256) in X w.r.t a unit change in Y.
// If angle > 0 && angle < 90, dx = -((int)(256 / t));
// If angle > 90 && angle < 180, dx = (int)(256 / t);
// If angle > 180 && angle < 270, dx = 1;
static INLINE int av1_get_dx(int angle) {
if (angle > 0 && angle < 90) {
return dr_intra_derivative[angle];
} else if (angle > 90 && angle < 180) {
return dr_intra_derivative[180 - angle];
} else {
// In this case, we are not really going to use dx. We may return any value.
return 1;
}
}
// Get the shift (up-scaled by 256) in Y w.r.t a unit change in X.
// If angle > 0 && angle < 90, dy = 1;
// If angle > 90 && angle < 180, dy = (int)(256 * t);
// If angle > 180 && angle < 270, dy = -((int)(256 * t));
static INLINE int av1_get_dy(int angle) {
if (angle > 90 && angle < 180) {
return dr_intra_derivative[angle - 90];
} else if (angle > 180 && angle < 270) {
return dr_intra_derivative[270 - angle];
} else {
// In this case, we are not really going to use dy. We may return any value.
return 1;
}
}
static INLINE int av1_use_intra_edge_upsample(int bs0, int bs1, int delta,
int type) {
const int d = abs(delta);
const int blk_wh = bs0 + bs1;
if (d == 0 || d >= 40) return 0;
return type ? (blk_wh <= 8) : (blk_wh <= 16);
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_COMMON_RECONINTRA_H_
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