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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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.
* This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef BACKENDS_MIXER_SDL_H
#define BACKENDS_MIXER_SDL_H
#include "backends/platform/sdl/sdl-sys.h"
#include "audio/mixer_intern.h"
/**
* SDL mixer manager. It wraps the actual implementation
* of the Audio:Mixer used by the engine, and setups
* the SDL audio subsystem and the callback for the
* audio mixer implementation.
*/
class SdlMixerManager {
public:
SdlMixerManager();
virtual ~SdlMixerManager();
/**
* Initialize and setups the mixer
*/
virtual void init();
/**
* Get the audio mixer implementation
*/
Audio::Mixer *getMixer() { return (Audio::Mixer *)_mixer; }
// Used by LinuxMoto Port
/**
* Pauses the audio system
*/
virtual void suspendAudio();
/**
* Resumes the audio system
*/
virtual int resumeAudio();
protected:
/** The mixer implementation */
Audio::MixerImpl *_mixer;
/**
* The obtained audio specification after opening the
* audio system.
*/
SDL_AudioSpec _obtainedRate;
/** State of the audio system */
bool _audioSuspended;
/**
* Returns the desired audio specification
*/
virtual SDL_AudioSpec getAudioSpec(uint32 rate);
/**
* Starts SDL audio
*/
virtual void startAudio();
/**
* Handles the audio callback
*/
virtual void callbackHandler(byte *samples, int len);
/**
* The mixer callback entry point. Static functions can't be overrided
* by subclasses, so it invokes the non-static function callbackHandler()
*/
static void sdlCallback(void *this_, byte *samples, int len);
};
#endif
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