AsyncAudioStreamStateDetector.h

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#ifndef ASYNC_AUDIO_STREAM_STATE_DETECTOR_INCLUDED
#define ASYNC_AUDIO_STREAM_STATE_DETECTOR_INCLUDED
 
 
/****************************************************************************
 *
 * System Includes
 *
 ****************************************************************************/
 
#include <sigc++/sigc++.h>
 
 
/****************************************************************************
 *
 * Project Includes
 *
 ****************************************************************************/
 
#include <AsyncAudioPassthrough.h>
 
 
/****************************************************************************
 *
 * Local Includes
 *
 ****************************************************************************/
 
 
 
/****************************************************************************
 *
 * Forward declarations
 *
 ****************************************************************************/
 
 
 
/****************************************************************************
 *
 * Namespace
 *
 ****************************************************************************/
 
namespace Async
{
 
 
/****************************************************************************
 *
 * Forward declarations of classes inside of the declared namespace
 *
 ****************************************************************************/
 
  
 
/****************************************************************************
 *
 * Defines & typedefs
 *
 ****************************************************************************/
 
 
 
/****************************************************************************
 *
 * Exported Global Variables
 *
 ****************************************************************************/
 
 
 
/****************************************************************************
 *
 * Class definitions
 *
 ****************************************************************************/
 
class AudioStreamStateDetector : public AudioPassthrough, public sigc::trackable
{
  public:
    AudioStreamStateDetector(void) : stream_state(STREAM_IDLE) {}
  
    virtual ~AudioStreamStateDetector(void) {}
  
    virtual int writeSamples(const float *samples, int count)
    {
      if (stream_state != STREAM_ACTIVE)
      {
        stream_state = STREAM_ACTIVE;
        sigStreamStateChanged(true, false);
      }
      return AudioPassthrough::writeSamples(samples, count);
    }
    
    virtual void flushSamples(void)
    {
      if (stream_state != STREAM_FLUSHING)
      {
        stream_state = STREAM_FLUSHING;
        sigStreamStateChanged(false, false);
      }
      AudioPassthrough::flushSamples();
    }
    
    virtual void allSamplesFlushed(void)
    {
      if (stream_state != STREAM_IDLE)
      {
        stream_state = STREAM_IDLE;
        sigStreamStateChanged(false, true);
      }
      AudioPassthrough::allSamplesFlushed();
    }
 
    bool isIdle(void)     const { return (stream_state == STREAM_IDLE); }
 
    bool isActive(void)   const { return (stream_state == STREAM_ACTIVE); }
 
    bool isFlushing(void) const { return (stream_state == STREAM_FLUSHING); }
    
    sigc::signal<void, bool, bool> sigStreamStateChanged;
    
    
  private:
    AudioStreamStateDetector(const AudioStreamStateDetector&);
    AudioStreamStateDetector& operator=(const AudioStreamStateDetector&);
 
    typedef enum
    {
      STREAM_IDLE, STREAM_ACTIVE, STREAM_FLUSHING
    } StreamState;
 
    StreamState stream_state;
    
}; /* AudioStreamStateDetector */
 
 
} /* namespace */
 
#endif /* ASYNC_AUDIO_STREAM_STATE_DETECTOR_INCLUDED */
 
 
 
/*
 * This file has not been truncated
 */