MASoundMemory.cpp

/*
 *  This file is part of the AiBO+ project
 *
 *  Copyright (C) 2005-2016 Csaba Kertész (csaba.kertesz@gmail.com)
 *
 *  AiBO+ is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  AiBO+ 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */

#include "MASoundMemory.hpp"

#include <MCDefs.hpp>

MASoundMemory::MASoundMemory(const std::string& display_name, MC::BinaryDataSPtr sound_data) :
  MASoundBase(display_name), Data(sound_data)
{
  Data->SetPosition(0);
}


int MASoundMemory::GetSize() const
{
  return Data->GetSize() / sizeof(int16_t);
}


bool MASoundMemory::IsValid() const
{
  return true;
}


bool MASoundMemory::IsCached() const
{
  return true;
}


void MASoundMemory::AddToBuffer(int position, int count, int32_t* buffer)
{
  if (count < 1)
    return;

  const int Size = GetSize();
  const int Position = MCBound(0, position, Size-1);
  int Duration = (Position+count > Size ? Size-Position : count);

  // An other safety check
  if (Duration < 0)
    Duration = 0;

  int16_t* SrcPtr = ((int16_t*)(void*)Data->GetData())+Position;
  int32_t* DestPtr = buffer;

  for (int i = 0; i < Duration; ++i)
  {
    *DestPtr += (int32_t)*SrcPtr;
    DestPtr++;
    SrcPtr++;
  }
}