/*
 * Copyright © 2018, VideoLAN and dav1d authors
 * 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 "src/cpu.h"
#include "src/cdef.h"

decl_cdef_dir_fn(BF(dav1d_cdef_find_dir, neon));

void BF(dav1d_cdef_padding4, neon)(uint16_t *tmp, const pixel *src,
                                   ptrdiff_t src_stride, const pixel (*left)[2],
                                   const pixel *const top, int h,
                                   enum CdefEdgeFlags edges);
void BF(dav1d_cdef_padding8, neon)(uint16_t *tmp, const pixel *src,
                                   ptrdiff_t src_stride, const pixel (*left)[2],
                                   const pixel *const top, int h,
                                   enum CdefEdgeFlags edges);

// Passing edges to this function, to allow it to switch to a more
// optimized version for fully edged cases. Using size_t for edges,
// to avoid ABI differences for passing more than one argument on the stack.
void BF(dav1d_cdef_filter4, neon)(pixel *dst, ptrdiff_t dst_stride,
                                  const uint16_t *tmp, int pri_strength,
                                  int sec_strength, int dir, int damping, int h,
                                  size_t edges HIGHBD_DECL_SUFFIX);
void BF(dav1d_cdef_filter8, neon)(pixel *dst, ptrdiff_t dst_stride,
                                  const uint16_t *tmp, int pri_strength,
                                  int sec_strength, int dir, int damping, int h,
                                  size_t edges HIGHBD_DECL_SUFFIX);

#define DEFINE_FILTER(w, h, tmp_stride)                                      \
static void                                                                  \
cdef_filter_##w##x##h##_neon(pixel *dst,                                     \
                             const ptrdiff_t stride,                         \
                             const pixel (*left)[2], const pixel *const top, \
                             const int pri_strength, const int sec_strength, \
                             const int dir, const int damping,               \
                             const enum CdefEdgeFlags edges                  \
                             HIGHBD_DECL_SUFFIX)                             \
{                                                                            \
    ALIGN_STK_16(uint16_t, tmp_buf, 12 * tmp_stride + 8,);                   \
    uint16_t *tmp = tmp_buf + 2 * tmp_stride + 8;                            \
    BF(dav1d_cdef_padding##w, neon)(tmp, dst, stride, left, top, h, edges);  \
    BF(dav1d_cdef_filter##w, neon)(dst, stride, tmp, pri_strength,           \
                                   sec_strength, dir, damping, h, edges      \
                                   HIGHBD_TAIL_SUFFIX);                      \
}

DEFINE_FILTER(8, 8, 16)
DEFINE_FILTER(4, 8, 8)
DEFINE_FILTER(4, 4, 8)


COLD void bitfn(dav1d_cdef_dsp_init_arm)(Dav1dCdefDSPContext *const c) {
    const unsigned flags = dav1d_get_cpu_flags();

    if (!(flags & DAV1D_ARM_CPU_FLAG_NEON)) return;

    c->dir = BF(dav1d_cdef_find_dir, neon);
    c->fb[0] = cdef_filter_8x8_neon;
    c->fb[1] = cdef_filter_4x8_neon;
    c->fb[2] = cdef_filter_4x4_neon;
}
