chromium/third_party/dav1d/libdav1d/src/warpmv.c

/*
 * 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.
 */

#include "config.h"

#include <stdlib.h>

#include "common/intops.h"

#include "src/warpmv.h"

static const uint16_t div_lut[257] = …;

static inline int iclip_wmp(const int v) { … }

static inline int resolve_divisor_32(const unsigned d, int *const shift) { … }

int dav1d_get_shear_params(Dav1dWarpedMotionParams *const wm) { … }

static int resolve_divisor_64(const uint64_t d, int *const shift) { … }

static int get_mult_shift_ndiag(const int64_t px,
                                const int idet, const int shift)
{ … }

static int get_mult_shift_diag(const int64_t px,
                               const int idet, const int shift)
{ … }

void dav1d_set_affine_mv2d(const int bw4, const int bh4,
                           const mv mv, Dav1dWarpedMotionParams *const wm,
                           const int bx4, const int by4)
{ … }

int dav1d_find_affine_int(const int (*pts)[2][2], const int np,
                          const int bw4, const int bh4,
                          const mv mv, Dav1dWarpedMotionParams *const wm,
                          const int bx4, const int by4)
{ … }