MpodCoreAudio.h

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//
// Copyright (C) 2009 SIPez LLC.
// Licensed to SIPfoundry under a Contributor Agreement.
//
// Copyright (C) 2009 SIPfoundry Inc.
// Licensed by SIPfoundry under the LGPL license.
//
// $$

// Author: Sergey Kostanbaev <Sergey DOT Kostanbaev AT sipez DOT com>

#ifndef _MpodCoreAudio_h_
#define _MpodCoreAudio_h_

// SYSTEM INCLUDES
#include <pthread.h>
#include <semaphore.h>

// APPLICATION INCLUDES
#include "mp/MpOutputDeviceDriver.h"
#include "mp/MpCoreAudioHardware.h"


// MACROS
// EXTERNAL FUNCTIONS
// EXTERNAL VARIABLES
// CONSTANTS
// STRUCTS
// TYPEDEFS
// FORWARD DECLARATIONS
class MpOutputDeviceManager;


class MpodCoreAudio : public MpOutputDeviceDriver
{
/* //////////////////////////// PUBLIC //////////////////////////////////// */
public:

/* ============================ CREATORS ================================== */


   MpodCoreAudio(const UtlString& name);
   ~MpodCoreAudio();


/* ============================ MANIPULATORS ============================== */


   OsStatus enableDevice(unsigned samplesPerFrame,
                         unsigned samplesPerSec,
                         MpFrameTime currentFrameTime);

   OsStatus disableDevice();

   OsStatus pushFrame(unsigned int numSamples,
                      const MpAudioSample* samples,
                      MpFrameTime frameTime);

   OsStatus setTickerNotification(OsNotification *pFrameTicker);


/* ============================ ACCESSORS ================================= */



/* ============================ INQUIRY =================================== */




/* //////////////////////////// PROTECTED ///////////////////////////////// */
protected:
   AudioUnit mOutputUnit;           
   AudioConverterRef mConverter;    
   CoreAudioHardware mDevice;       
   
   double mOutputSampleRate;        
   MpAudioSample* mAudioFrame;      
   MpAudioSample* mAudioFrameData;  
   
   OsNotification *pNotificator;    
   MpFrameTime mCurrentFrameTime;   

   OsStatus signalForNextFrame();

   void skipFrame();

   bool setAudioUnitFormat(const AudioStreamBasicDescription& ds);
   
   bool initResempler(const AudioStreamBasicDescription& ds);
   
   bool setBuffers();
   
   static 
   void propertyListener(void * inRefCon,
                         AudioUnit ci,
                         AudioUnitPropertyID inID,
                         AudioUnitScope inScope,
                         AudioUnitElement inElement);
   
   static
   OSStatus renderProc(void * inRefCon,
                       AudioUnitRenderActionFlags* inActionFlags,
                       const AudioTimeStamp * inTimeStamp,
                       UInt32 inBusNumber,
                       UInt32 inNumFrames,
                       AudioBufferList * ioData);
   
   static
   OSStatus ACproc(AudioConverterRef inAudioConverter, 
                   UInt32 * ioDataPackets,
                   AudioBufferList* ioData,
                   AudioStreamPacketDescription ** inUserData,
                   void *inUData);
   
/* //////////////////////////// PRIVATE /////////////////////////////////// */
private:

   MpodCoreAudio(const MpodCoreAudio& rMpOutputDeviceDriver);

   MpodCoreAudio& operator=(const MpodCoreAudio& rhs);


};

/* ============================ INLINE METHODS ============================ */


#endif  // _MpodCoreAudio_h_