/*

 * Copyright © 2018, VideoLAN and dav1d authors

 * Copyright © 2018, Two Orioles, LLC

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice, this

 *    list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR

 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef DAV1D_SRC_IPRED_PREPARE_H

#define DAV1D_SRC_IPRED_PREPARE_H

#include <stddef.h>

#include <stdint.h>

#include "common/bitdepth.h"

#include "src/env.h"

#include "src/intra_edge.h"

#include "src/levels.h"

/*

 * Luma intra edge preparation.

 *

 * x/y/start/w/h are in luma block (4px) units:

 * - x and y are the absolute block positions in the image;

 * - start/w/h are the *dependent tile* boundary positions. In practice, start

 *   is the horizontal tile start, w is the horizontal tile end, the vertical

 *   tile start is assumed to be 0 and h is the vertical image end.

 *

 * edge_flags signals which edges are available for this transform-block inside

 * the given partition, as well as for the partition inside the superblock

 * structure.

 *

 * dst and stride are pointers to the top/left position of the current block,

 * and can be used to locate the top, left, top/left, top/right and bottom/left

 * edge pointers also.

 *

 * angle is the angle_delta [-3..3] on input, and the absolute angle on output.

 *

 * mode is the intra prediction mode as coded in the bitstream. The return value

 * is this same mode, converted to an index in the DSP functions.

 *

 * tw/th are the size of the transform block in block (4px) units.

 *

 * topleft_out is a pointer to scratch memory that will be filled with the edge

 * pixels. The memory array should have space to be indexed in the [-2*w,2*w]

 * range, in the following order:

 * - [0] will be the top/left edge pixel;

 * - [1..w] will be the top edge pixels (1 being left-most, w being right-most);

 * - [w+1..2*w] will be the top/right edge pixels;

 * - [-1..-w] will be the left edge pixels (-1 being top-most, -w being bottom-

 *   most);

 * - [-w-1..-2*w] will be the bottom/left edge pixels.

 * Each edge may remain uninitialized if it is not used by the returned mode

 * index. If edges are not available (because the edge position is outside the

 * tile dimensions or because edge_flags indicates lack of edge availability),

 * they will be extended from nearby edges as defined by the av1 spec.

 */

enum IntraPredMode

    bytefn(dav1d_prepare_intra_edges)(int x, int have_left, int y, int have_top,

                                      int w, int h, enum EdgeFlags edge_flags,

                                      const pixel *dst, ptrdiff_t stride,

                                      const pixel *prefilter_toplevel_sb_edge,

                                      enum IntraPredMode mode, int *angle,

                                      int tw, int th, int filter_edge,

                                      pixel *topleft_out HIGHBD_DECL_SUFFIX);

// These flags are OR'd with the angle argument into intra predictors.

// ANGLE_USE_EDGE_FILTER_FLAG signals that edges should be convolved

// with a filter before using them to predict values in a block.

// ANGLE_SMOOTH_EDGE_FLAG means that edges are smooth and should use

// reduced filter strength.

#define ANGLE_USE_EDGE_FILTER_FLAG 1024

#define ANGLE_SMOOTH_EDGE_FLAG      512

static inline int sm_flag(const BlockContext *const b, const int idx) {

    if (!b->intra[idx]) return 0;

    const enum IntraPredMode m = b->mode[idx];

    return (m == SMOOTH_PRED || m == SMOOTH_H_PRED ||

            m == SMOOTH_V_PRED) ? ANGLE_SMOOTH_EDGE_FLAG : 0;

}

Unexecuted instantiation: recon_tmpl.c:sm_flag

Unexecuted instantiation: ipred_prepare_tmpl.c:sm_flag

static inline int sm_uv_flag(const BlockContext *const b, const int idx) {

    const enum IntraPredMode m = b->uvmode[idx];

    return (m == SMOOTH_PRED || m == SMOOTH_H_PRED ||

            m == SMOOTH_V_PRED) ? ANGLE_SMOOTH_EDGE_FLAG : 0;

}

Unexecuted instantiation: recon_tmpl.c:sm_uv_flag

Unexecuted instantiation: ipred_prepare_tmpl.c:sm_uv_flag

#endif /* DAV1D_SRC_IPRED_PREPARE_H */