AsyncAudioProcessor.h

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#ifndef ASYNC_AUDIO_PROCESSOR_INCLUDED
#define ASYNC_AUDIO_PROCESSOR_INCLUDED
 
 
/****************************************************************************
 *
 * System Includes
 *
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#include <sigc++/sigc++.h>
#include <string>
 
 
/****************************************************************************
 *
 * Project Includes
 *
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/****************************************************************************
 *
 * Local Includes
 *
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#include <AsyncAudioSource.h>
#include <AsyncAudioSink.h>
 
 
 
/****************************************************************************
 *
 * 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 AudioProcessor : public AudioSink, public AudioSource, public sigc::trackable
{
  public:
    AudioProcessor(void);
  
    virtual ~AudioProcessor(void);
  
    int writeSamples(const float *samples, int len);
    
    void flushSamples(void);
 
    void resumeOutput(void);
    
    void allSamplesFlushed(void);
    
 
  protected:
    void setInputOutputSampleRate(int input_rate, int output_rate);
    
    virtual void processSamples(float *dest, const float *src, int count) = 0;
    
    
  private:
    static const int BUFSIZE = 256;
    
    float       buf[BUFSIZE];
    int         buf_cnt;
    bool        do_flush;
    bool        input_stopped;
    bool        output_stopped;
    int         input_rate;
    int         output_rate;
    float       *input_buf;
    int         input_buf_cnt;
    int         input_buf_size;
    
    AudioProcessor(const AudioProcessor&);
    AudioProcessor& operator=(const AudioProcessor&);
    void writeFromBuf(void);
 
};  /* class AudioProcessor */
 
 
} /* namespace */
 
#endif /* ASYNC_AUDIO_PROCESSOR_INCLUDED */
 
 
 
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