MpidCoreAudio.h

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//
// Copyright (C) 2007 SIPez LLC.
// Licensed to SIPfoundry under a Contributor Agreement.
//
// Copyright (C) 2007 SIPfoundry Inc.
// Licensed by SIPfoundry under the LGPL license.
//
// $$

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

#ifndef _MpidCoreAudio_h_
#define _MpidCoreAudio_h_

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


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

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

class MpidCoreAudio : public MpInputDeviceDriver
{
/* //////////////////////////// PUBLIC //////////////////////////////////// */
public:

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


   MpidCoreAudio(const UtlString& name,
                 MpInputDeviceManager& deviceManager);
   ~MpidCoreAudio();


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


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

   OsStatus disableDevice();


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



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


   UtlBoolean isDeviceValid();
   

/* //////////////////////////// PROTECTED ///////////////////////////////// */
protected:
   AudioUnit mInputUnit;            
   AudioConverterRef mConverter;    
   CoreAudioHardware mDevice;       
   
   double mInputSampleRate;         
   MpAudioSample* mAudioFrame;      

   void* mTempBuffer;           
   void* mTempBufferHalf;       
   unsigned mTempBufferHalfSize; 
   unsigned mInputFrameSize;     
   
   void pushFrame();

   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:

   MpidCoreAudio(const MpidCoreAudio& rMpInputDeviceDriver);

   MpidCoreAudio& operator=(const MpidCoreAudio& rhs);

};

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

#endif  // _MpidCoreAudio_h_