/*

 *  Copyright (c) 2015 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 <stdlib.h>

#include "./vpx_config.h"

#include "./vpx_dsp_rtcd.h"

#include "vpx/vpx_integer.h"

#include "vpx_ports/mem.h"

void vpx_subtract_block_c(int rows, int cols, int16_t *diff_ptr,

                          ptrdiff_t diff_stride, const uint8_t *src_ptr,

                          ptrdiff_t src_stride, const uint8_t *pred_ptr,

                          ptrdiff_t pred_stride) {

  int r, c;

  for (r = 0; r < rows; r++) {

    for (c = 0; c < cols; c++) diff_ptr[c] = src_ptr[c] - pred_ptr[c];

    diff_ptr += diff_stride;

    pred_ptr += pred_stride;

    src_ptr += src_stride;

  }

}

#if CONFIG_VP9_HIGHBITDEPTH

void vpx_highbd_subtract_block_c(int rows, int cols, int16_t *diff_ptr,

                                 ptrdiff_t diff_stride, const uint8_t *src8_ptr,

                                 ptrdiff_t src_stride, const uint8_t *pred8_ptr,

                                 ptrdiff_t pred_stride, int bd) {

  int r, c;

  uint16_t *src = CONVERT_TO_SHORTPTR(src8_ptr);

  uint16_t *pred = CONVERT_TO_SHORTPTR(pred8_ptr);

  (void)bd;

  for (r = 0; r < rows; r++) {

    for (c = 0; c < cols; c++) {

      diff_ptr[c] = src[c] - pred[c];

    }

    diff_ptr += diff_stride;

    pred += pred_stride;

    src += src_stride;

  }

}

#endif  // CONFIG_VP9_HIGHBITDEPTH