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AUD_SDLMixer.cpp

/*
 * $Id$
 *
 * ***** BEGIN LGPL LICENSE BLOCK *****
 *
 * Copyright 2009 Jörg Hermann Müller
 *
 * This file is part of AudaSpace.
 *
 * AudaSpace 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 3 of the License, or
 * (at your option) any later version.
 *
 * AudaSpace 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 Lesser General Public License
 * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ***** END LGPL LICENSE BLOCK *****
 */

#include "AUD_SDLMixer.h"
#include "AUD_SDLMixerFactory.h"

#include <SDL.h>

00031 AUD_SDLMixer::AUD_SDLMixer()
{
      m_factory = NULL;
}

AUD_SDLMixer::~AUD_SDLMixer()
{
      if(m_factory)
      {
            delete m_factory; AUD_DELETE("factory")
      }
}

00044 AUD_IReader* AUD_SDLMixer::prepare(AUD_IReader* reader)
{
      m_factory->setReader(reader);
      return m_factory->createReader();
}

00050 void AUD_SDLMixer::setSpecs(AUD_Specs specs)
{
      m_samplesize = AUD_SAMPLE_SIZE(specs);
      if(m_factory)
      {
            delete m_factory; AUD_DELETE("factory")
      }
      m_factory = new AUD_SDLMixerFactory(specs); AUD_NEW("factory")
}

00060 void AUD_SDLMixer::add(sample_t* buffer, AUD_Specs specs, int length,
                                 float volume)
{
      AUD_SDLMixerBuffer buf;
      buf.buffer = buffer;
      buf.length = length;
      buf.volume = volume;
      m_buffers.push_back(buf);
}

00070 void AUD_SDLMixer::superpose(sample_t* buffer, int length, float volume)
{
      AUD_SDLMixerBuffer buf;

      while(!m_buffers.empty())
      {
            buf = m_buffers.front();
            m_buffers.pop_front();
            SDL_MixAudio((Uint8*)buffer,
                               (Uint8*)buf.buffer,
                               buf.length * m_samplesize,
                               (int)(SDL_MIX_MAXVOLUME * volume * buf.volume));
      }
}

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