text: /*******************************************************************************
   * Copyright 2009-2016 Jörg Müller
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   ******************************************************************************/
  
  #include "util/Buffer.h"
  
  #include <algorithm>
  #include <cstring>
  #include <cstdlib>
  
  #define ALIGNMENT 32
  #define ALIGN(a) (a + ALIGNMENT - ((long long)a & (ALIGNMENT-1)))
  
  AUD_NAMESPACE_BEGIN
  
  Buffer::Buffer(int size)
  {
  	m_size = size;
  	m_buffer = (data_t*) std::malloc(size + ALIGNMENT);
  }
  
  Buffer::~Buffer()
  {
  	std::free(m_buffer);
  }
  
  sample_t* Buffer::getBuffer() const
  {
  	return (sample_t*) ALIGN(m_buffer);
  }
  
  int Buffer::getSize() const
  {
  	return m_size;
  }
  
  void Buffer::resize(int size, bool keep)
  {
  	if(keep)
  	{
  		data_t* buffer = (data_t*) std::malloc(size + ALIGNMENT);
  
  		std::memcpy(ALIGN(buffer), ALIGN(m_buffer), std::min(size, m_size));
  
  		std::free(m_buffer);
  		m_buffer = buffer;
  	}
  	else
  		m_buffer = (data_t*) std::realloc(m_buffer, size + ALIGNMENT);
  
  	m_size = size;
  }
  
  void Buffer::assureSize(int size, bool keep)
  {
  	if(m_size < size)
  		resize(size, keep);
  }
  
  AUD_NAMESPACE_END
  