/*****************************************************************************
 * This file is part of Kvazaar HEVC encoder.
 *
 * Copyright (C) 2013-2015 Tampere University of Technology and others (see
 * COPYING file).
 *
 * Kvazaar is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 *
 * Kvazaar is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with Kvazaar.  If not, see <http://www.gnu.org/licenses/>.
 ****************************************************************************/

/*
 * \file
 */

#include <string.h>
#include <stdlib.h>

#include "cu.h"
#include "threads.h"


void coefficients_blit(const coefficient * const orig, coefficient * const dst,
                         const unsigned width, const unsigned height,
                         const unsigned orig_stride, const unsigned dst_stride)
{
  unsigned y;

  for (y = 0; y < height; ++y) {
    memcpy(&dst[y*dst_stride], &orig[y*orig_stride], width * sizeof(coefficient));
  }
}

unsigned coefficients_calc_abs(const coefficient *const buf, const int buf_stride,
                        const int width)
{
  int sum = 0;
  int y, x;

  for (y = 0; y < width; ++y) {
    for (x = 0; x < width; ++x) {
      sum += abs(buf[x + y * buf_stride]);
    }
  }

  return sum;
}

cu_array_t * cu_array_alloc(const int width_in_scu, const int height_in_scu) {
  unsigned cu_array_size = height_in_scu * width_in_scu;
  cu_array_t *cua;
  cua = MALLOC(cu_array_t, 1);
  cua->data = (cu_info*)malloc(sizeof(cu_info) * cu_array_size);
  cua->refcount = 1;
  FILL_ARRAY(cua->data, 0, cu_array_size);
  return cua;
}

int cu_array_free(cu_array_t * const cua)
{
  int32_t new_refcount;
  if (!cua) return 1;
  
  new_refcount = ATOMIC_DEC(&(cua->refcount));
  //Still we have some references, do nothing
  if (new_refcount > 0) return 1;
  
  FREE_POINTER(cua->data);
  free(cua);

  return 1;
}