AsyncAudioSelector.h

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#ifndef ASYNC_AUDIO_SELECTOR_INCLUDED
#define ASYNC_AUDIO_SELECTOR_INCLUDED
 
 
/****************************************************************************
 *
 * System Includes
 *
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#include <map>
 
 
/****************************************************************************
 *
 * Project Includes
 *
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#include <AsyncAudioSource.h>
 
 
/****************************************************************************
 *
 * Local Includes
 *
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/****************************************************************************
 *
 * Forward declarations
 *
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/****************************************************************************
 *
 * Namespace
 *
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namespace Async
{
 
 
/****************************************************************************
 *
 * Forward declarations of classes inside of the declared namespace
 *
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/****************************************************************************
 *
 * Defines & typedefs
 *
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/****************************************************************************
 *
 * Exported Global Variables
 *
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/****************************************************************************
 *
 * Class definitions
 *
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class AudioSelector : public AudioSource
{
  public:
    AudioSelector(void);
  
    ~AudioSelector(void);
  
    void addSource(AudioSource *source);
    
    void removeSource(AudioSource *source);
    
    void setSelectionPrio(AudioSource *source, int prio);
    
    void enableAutoSelect(AudioSource *source, int prio);
 
    void disableAutoSelect(AudioSource *source);
    
    bool autoSelectEnabled(const AudioSource *source) const;
 
    void selectSource(AudioSource *source);
 
    AudioSource *selectedSource(void) const;
 
    void setFlushWait(AudioSource *source, bool flush_wait);
 
    virtual void resumeOutput(void);
 
  protected:
    virtual void allSamplesFlushed(void);
    
  private:
    typedef enum
    {
      STATE_IDLE, STATE_WRITING, STATE_STOPPED, STATE_FLUSHING
    } StreamState;
 
    class Branch;
    typedef std::map<Async::AudioSource *, Branch *> BranchMap;
    
    BranchMap   m_branch_map;
    Branch *    m_selected_branch;
    StreamState m_stream_state;
    
    AudioSelector(const AudioSelector&);
    AudioSelector& operator=(const AudioSelector&);
    void selectBranch(Branch *branch);
    Branch *selectedBranch(void) const { return m_selected_branch; }
    void selectHighestPrioActiveBranch(bool clear_if_no_active);
    int branchWriteSamples(const float *samples, int count);
    void branchFlushSamples(void);
    
    friend class Branch;
    
};  /* class AudioSelector */
 
 
} /* namespace */
 
#endif /* ASYNC_AUDIO_SELECTOR_INCLUDED */
 
 
 
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