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AUD_SDLDevice.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_SDLDevice.h"
#include "AUD_IReader.h"

00030 void AUD_SDLDevice::SDL_mix(void *data, Uint8* buffer, int length)
{
      AUD_SDLDevice* device = (AUD_SDLDevice*)data;

      device->mix((sample_t*)buffer, length/AUD_SAMPLE_SIZE(device->m_specs));
}

00037 AUD_SDLDevice::AUD_SDLDevice(AUD_Specs specs, int buffersize)
{
      if(specs.channels == AUD_CHANNELS_INVALID)
            specs.channels = AUD_CHANNELS_STEREO;
      if(specs.format == AUD_FORMAT_INVALID)
            specs.format = AUD_FORMAT_S16;
      if(specs.rate == AUD_RATE_INVALID)
            specs.rate = AUD_RATE_44100;

      m_specs = specs;

      SDL_AudioSpec format, obtained;

      format.freq = m_specs.rate;
      if(m_specs.format == AUD_FORMAT_U8)
            format.format = AUDIO_U8;
      else
            format.format = AUDIO_S16SYS;
      format.channels = m_specs.channels;
      format.samples = buffersize;
      format.callback = AUD_SDLDevice::SDL_mix;
      format.userdata = this;

      if(SDL_OpenAudio(&format, &obtained) != 0)
            AUD_THROW(AUD_ERROR_SDL);

      m_specs.rate = (AUD_SampleRate)obtained.freq;
      m_specs.channels = (AUD_Channels)obtained.channels;
      if(obtained.format == AUDIO_U8)
            m_specs.format = AUD_FORMAT_U8;
      else if(obtained.format == AUDIO_S16LSB || obtained.format == AUDIO_S16MSB)
            m_specs.format = AUD_FORMAT_S16;
      else
            AUD_THROW(AUD_ERROR_SDL);

      m_mixer = new AUD_SDLMixer(); AUD_NEW("mixer")
      m_mixer->setSpecs(m_specs);

      create();
}

00078 AUD_SDLDevice::~AUD_SDLDevice()
{
      lock();
      SDL_CloseAudio();
      unlock();

      destroy();
}

00087 void AUD_SDLDevice::playing(bool playing)
{
      SDL_PauseAudio(playing ? 0 : 1);
}

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