/* * 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;} 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;} #endif /* DAV1D_SRC_IPRED_PREPARE_H */