/*
 *  Copyright (c) 2023 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include <assert.h>

#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/arm/vpx_convolve8_neon.h"
#include "vpx_dsp/vpx_dsp_common.h"
#include "vpx_ports/mem.h"

void vpx_convolve8_neon_i8mm(const uint8_t *src, ptrdiff_t src_stride,
                             uint8_t *dst, ptrdiff_t dst_stride,
                             const InterpKernel *filter, int x0_q4,
                             int x_step_q4, int y0_q4, int y_step_q4, int w,
                             int h) {
  /* Given our constraints: w <= 64, h <= 64, taps == 8 we can reduce the
   * maximum buffer size to 64 * (64 + 7). */
  uint8_t temp[64 * 71];

  /* Account for the vertical phase needing 3 lines prior and 4 lines post. */
  const int intermediate_height = h + 7;

  assert(y_step_q4 == 16);
  assert(x_step_q4 == 16);

  /* Filter starting 3 lines back. */
  vpx_convolve8_2d_horiz_neon_i8mm(src - src_stride * 3, src_stride, temp, w,
                                   filter, x0_q4, x_step_q4, y0_q4, y_step_q4,
                                   w, intermediate_height);

  /* Step into the temp buffer 3 lines to get the actual frame data. */
  vpx_convolve8_vert_neon_i8mm(temp + w * 3, w, dst, dst_stride, filter, x0_q4,
                               x_step_q4, y0_q4, y_step_q4, w, h);
}

void vpx_convolve8_avg_neon_i8mm(const uint8_t *src, ptrdiff_t src_stride,
                                 uint8_t *dst, ptrdiff_t dst_stride,
                                 const InterpKernel *filter, int x0_q4,
                                 int x_step_q4, int y0_q4, int y_step_q4, int w,
                                 int h) {
  uint8_t temp[64 * 71];
  const int intermediate_height = h + 7;

  assert(y_step_q4 == 16);
  assert(x_step_q4 == 16);

  vpx_convolve8_2d_horiz_neon_i8mm(src - src_stride * 3, src_stride, temp, w,
                                   filter, x0_q4, x_step_q4, y0_q4, y_step_q4,
                                   w, intermediate_height);

  vpx_convolve8_avg_vert_neon_i8mm(temp + w * 3, w, dst, dst_stride, filter,
                                   x0_q4, x_step_q4, y0_q4, y_step_q4, w, h);
}
