libGizmod/Alsa.hpp

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/*
  
  Copyright (c) 2007, Tim Burrell
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at 

        http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and 
  limitations under the License. 
  
*/

#ifndef __Alsa_h
#define __Alsa_h

#if HAVE_CONFIG_H
#include "config.h"
#endif

#include "AlsaEvent.hpp"
#include "AlsaSoundCard.hpp"
#include "AlsaMixer.hpp"
#include <string>
#include <vector>
#include <list>
#include <alsa/asoundlib.h>
#include <boost/shared_ptr.hpp>

// Namespace

namespace Gizmod {

// Typedefs

// Alsa Class Definition

class Alsa : public AlsaInterface { friend class AlsaMixer;
public: 
        // public functions
        void                            init();                 
        AlsaMixer const *               getDefaultMixerSwitch();
        AlsaMixer const *               getDefaultMixerVolume();
        size_t                          getNumSoundCards();     
        AlsaSoundCard const *           getSoundCard(int Index);
        void                            toggleMuteAllCards();   
        virtual void                    onAlsaEventMixerElementAttach(AlsaEvent const & Event, AlsaSoundCard const & SoundCard, AlsaMixer const & Mixer); 
        virtual void                    onAlsaEventMixerElementChange(AlsaEvent const & Event, AlsaSoundCard const & SoundCard, AlsaMixer const & Mixer); 
        virtual void                    onAlsaEventMixerElementDetach(AlsaEvent const & Event, AlsaSoundCard const & SoundCard, AlsaMixer const & Mixer); 
        virtual void                    onAlsaEventSoundCardAttach(AlsaEvent const & Event, AlsaSoundCard const & SoundCard); 
        virtual void                    onAlsaEventSoundCardDetach(AlsaEvent const & Event, AlsaSoundCard const & SoundCard); 
        void                            registerDefaultMixerPriority(std::string MixerName); 
        void                            shutdown();             

        // construction / deconstruction
        Alsa();
        virtual ~Alsa();
        
        // public static functions

private:
        // private functions
        void                            _onAlsaEventMixerElementChange(AlsaEvent const & Event, AlsaSoundCard const & SoundCard, AlsaMixer & Mixer); 
                
        // private member variables
        std::list<std::string>          mDefaultMixerPriorities;
        int                             mDefaultMixerVolumePriority; 
        int                             mDefaultMixerSwitchPriority; 
        AlsaMixer *                     mpDefaultMixerSwitch;   
        AlsaMixer *                     mpDefaultMixerVolume;   
        bool                            mMuted;                 
        std::vector< boost::shared_ptr<AlsaSoundCard> > mSoundCards; 
};


} // Gizmod namespace

#endif // __Alsa_h

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