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101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef BACKENDS_MIXER_SDL_H
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#define BACKENDS_MIXER_SDL_H
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#include "backends/platform/sdl/sdl-sys.h"
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#include "audio/mixer_intern.h"
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/**
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* SDL mixer manager. It wraps the actual implementation
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* of the Audio:Mixer used by the engine, and setups
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* the SDL audio subsystem and the callback for the
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* audio mixer implementation.
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*/
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class SdlMixerManager {
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public:
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SdlMixerManager();
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virtual ~SdlMixerManager();
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/**
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* Initialize and setups the mixer
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*/
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virtual void init();
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/**
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* Get the audio mixer implementation
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*/
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Audio::Mixer *getMixer() { return (Audio::Mixer *)_mixer; }
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// Used by LinuxMoto Port
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/**
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* Pauses the audio system
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*/
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virtual void suspendAudio();
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/**
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* Resumes the audio system
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*/
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virtual int resumeAudio();
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protected:
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/** The mixer implementation */
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Audio::MixerImpl *_mixer;
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/**
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* The obtained audio specification after opening the
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* audio system.
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*/
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SDL_AudioSpec _obtainedRate;
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/** State of the audio system */
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bool _audioSuspended;
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/**
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* Returns the desired audio specification
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*/
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virtual SDL_AudioSpec getAudioSpec(uint32 rate);
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/**
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* Starts SDL audio
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*/
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virtual void startAudio();
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/**
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* Handles the audio callback
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*/
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virtual void callbackHandler(byte *samples, int len);
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/**
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* The mixer callback entry point. Static functions can't be overrided
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* by subclasses, so it invokes the non-static function callbackHandler()
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*/
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static void sdlCallback(void *this_, byte *samples, int len);
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};
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#endif
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