libGizmod/AlsaMixer.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 __AlsaMixer_h
#define __AlsaMixer_h

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

#include "AlsaMixerInterface.hpp"
#include "AlsaMixerElements.hpp"
#include "AlsaSoundCardInterface.hpp"
#include <string>
#include <vector>
#include <alsa/asoundlib.h>

// Namespace

namespace Gizmod {

// Typedefs

// AlsaMixer Class Definition

class AlsaMixer : public AlsaMixerInterface, public AlsaMixerElements {
public: 
        // public member variables
        
        // public functions
        std::string                     getName() const;                
        std::string                     getNameShort() const;           
        bool                            setSwitchCapture(bool Enable);  
        bool                            setSwitchPlayback(bool Enable); 
        bool                            setVolumeCapture(long Volume);  
        bool                            setVolumeCapturePercent(float Percent); 
        bool                            setVolumePlayback(long Volume); 
        bool                            setVolumePlaybackPercent(float Percent); 
        int                             signalMixerEvent();             

        // construction / deconstruction
        AlsaMixer();
        AlsaMixer(AlsaSoundCardInterface * piSoundCard, snd_mixer_elem_t * MixerElement, std::string MixerName, std::string MixerNameUnique, unsigned int MixerID);
        virtual ~AlsaMixer();
        
        // public static functions
        static int                      MixerElemCallback(snd_mixer_elem_t * MixerElement, unsigned int EventMask); 

private:
        // private functions
        void                            init();                         
        int                             mixerElemCallback(snd_mixer_elem_t * MixerElement, unsigned int EventMask); 
        void                            populateInfo();                 
        void                            shutdown();                     
                
        // private member variables
        AlsaInterface *                 mpiAlsa;                        
        snd_mixer_elem_t *              mMixerElement;                  
        std::string                     mMixerName;                     
        std::string                     mMixerNameUnique;               
        unsigned int                    mMixerID;                       
        AlsaMixerElements               mOldState;                      
        AlsaSoundCardInterface *        mpiSoundCard;                   
        
private: 
        // serialization
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version) {
                ar & boost::serialization::base_object<AlsaMixerElements>(*this);
                ar & mMixerName;
                ar & mMixerNameUnique;
                ar & mMixerID;
                ar & mOldState;
        }                               
};


} // Gizmod namespace

#endif // __AlsaMixer_h

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