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Monday the 6th of February 2012 @ 08:56am

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LibN2L N2L Home Older News Downloads Documentation (n2l5) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Documentation (libN2L-4) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Bugtracker Project Page Report a Bug Bug List Related Things Life 2130 Devel Game Journal

LibN2L-4 Library Code Reference Classes Compounds Files Members Method Index Full Reference cAudioMixer.h Go to the documentation of this file. /************************************************************************ Nova-2 Library (libN2L, or simply n2l) Game development C++ Library Copyright (C) 2003 Aaron Cameron This library 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 2.1 of the License, or (at your option) any later version. This library 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 this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA A copy of the GNU Lesser General Public License has been provided with this library in the file 'COPYING'. Contact information for the author of this library has been provided with this library in the file 'AUTHOR'. ************************************************************************/ #ifndef _n2l4_cAudioMixer_H #define _n2l4_cAudioMixer_H #include "n2l/n2l.h" #include "audio/types.h" #include "SDL_mixer.h" #include <map> /******************************************************************************/ namespace n2l { class cAudioSource; class cAudioMixer { private: class cSubSysHolder { public: cSubSysHolder(); ~cSubSysHolder(); }; public: typedef tUint tFrequency; typedef tSint tMixChannels; typedef enum { Format_U8 = AUDIO_U8, Format_S8 = AUDIO_S8, Format_U16LSB = AUDIO_U16LSB, Format_S16LSB = AUDIO_S16LSB, Format_U16MSB = AUDIO_U16MSB, Format_S16MSB = AUDIO_S16MSB, Format_U16SYS = AUDIO_U16SYS, Format_S16SYS = AUDIO_S16SYS, Format_Unknown } tFormat; typedef enum { Fading_None = MIX_NO_FADING, Fading_Out = MIX_FADING_OUT, Fading_In = MIX_FADING_IN } tFadeStatus; typedef enum { Channels_Mono = 1, Channels_Stereo = 2 } tSoundChannels; typedef enum { SoundDriver_Auto, SoundDriver_OpenBSD, SoundDriver_DSP, SoundDriver_ALSA, SoundDriver_Audio, SoundDriver_AL, SoundDriver_ARTSC, SoundDriver_ESD, SoundDriver_NAS, SoundDriver_DMA, SoundDriver_DSound, SoundDriver_WaveOut, SoundDriver_BeOS, SoundDriver_MacOSSoundManager, SoundDriver_AIX, SoundDriver_AHI, SoundDriver_Disk, SoundDriver_Null, // Pseudo driver. Just skips initialization SoundDriver_NumSoundDrivers } tSoundDriver; static const tFrequency DefaultFrequency; static const tFormat DefaultFormat; static const tSoundChannels DefaultSoundChannels; static const tSint DefaultChunkSize; static const tMixChannels DefaultMixingChannels; static const tMixChannels MusicChannel; static cAutoPtr<cSubSysHolder> smSubSysHolder; static void setDriver( const tSoundDriver &iDriver ); static const tSoundDriver getDriver(); static void openAudio( const tFrequency iFrequency = DefaultFrequency, const tFormat iFormat = DefaultFormat, const tSoundChannels iSoundChannels = DefaultSoundChannels, const tSint iChunkSize = DefaultChunkSize ); static void closeAudio(); static const tFrequency frequency(); static const tFormat format(); static const tUint sampleSize(); static const tString &formatAsString(); static const tSoundChannels soundChannels(); static void allocateMixingChannels( const tMixChannels iNum ); static const tUint numChannelsPlaying(); static const tUint numFreeChannels(); static const tUint numChannels(); static void musicVolume( const tSint iVolume ); static void musicVolume( const tFloat iVolume ); static void fadeOutMusic( const tUint iMilliseconds ); static const tFadeStatus musicFadeStatus(); static void channelVolume( const tAudioChannel iChannel, const tFloat &iVolume ); inline static const tBool inited() { return smInited; } static const tString &driverName( const tSoundDriver &iDriver ); static const tString &driverName(); static void registerSource( cAudioSource *ioSource ); static void unregisterSource( cAudioSource *ioSource ); private: typedef std::map<tAudioChannel, cAudioSource*> tChannelSourceMap; static tBool smInited; static tMixChannels smNumMixingChannels; static tSoundDriver smDriver; static tChannelSourceMap mChannelSourceMap; static void boundCheckFrequency( const tFrequency iFrequency ); static void boundCheckFormat( const tFormat iFormat ); static void boundCheckSoundChannels( const tSoundChannels iChannels ); static void boundCheckChunkSize( const tSint iChunkSize ); static void boundCheckSoundDriver( const tSoundDriver &iDriver ); static const tString &envStringForDriver( const tSoundDriver &iDriver ); static void mixerSampleFinishedCallback( int iChannel ); }; // class } // namespace #endif

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