MpodAlsa.h

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//
// Copyright (C) 2007-2017 SIPez LLC.  All rights reserved.
//
// $$

#ifndef _MpodAlsa_h_
#define _MpodAlsa_h_

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

#ifdef __linux__
#include <sys/types.h>
#include <sys/soundcard.h>
#endif // __linux__


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


// MACROS
// EXTERNAL FUNCTIONS
// EXTERNAL VARIABLES
// CONSTANTS
#define MAX_DEVICE_NAME_SIZE 256

// STRUCTS
// TYPEDEFS
// FORWARD DECLARATIONS
class MpOutputDeviceManager;
class UtlContainer;


class MpodAlsa : public MpOutputDeviceDriver
{
    friend class MpAlsa;
/* //////////////////////////// PUBLIC //////////////////////////////////// */
public:

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


   MpodAlsa(const UtlString& name);
   virtual ~MpodAlsa();


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


   OsStatus enableDevice(unsigned samplesPerFrame,
                         unsigned samplesPerSec,
                         MpFrameTime currentFrameTime,
                         OsCallback &frameTicker);

   OsStatus disableDevice();

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

   OsStatus setNotificationMode(UtlBoolean bThreadNotification);


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

    static const char* getDefaultDeviceName();

    static int getDeviceNames(UtlContainer& devicesNames);

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


   virtual OsStatus canEnable();
   /* @see MpOutputDeviceDriver::canEnable */

   inline UtlBoolean isDeviceValid();


/* //////////////////////////// PROTECTED ///////////////////////////////// */
protected:
   MpAudioSample* mAudioFrame;  
   MpFrameTime mCurrentFrameTime; 
   UtlBoolean mNotificationThreadEn;

   MpAlsaContainer* mpCont; 

   OsStatus signalForNextFrame();

   void skipFrame();

/* //////////////////////////// PRIVATE /////////////////////////////////// */
private:
   MpAlsa *pDevWrapper;
   static char spDefaultDeviceName[MAX_DEVICE_NAME_SIZE];

   MpodAlsa(const MpodAlsa& rMpOutputDeviceDriver);

   MpodAlsa& operator=(const MpodAlsa& rhs);

   int mNullTickers;

};

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

UtlBoolean MpodAlsa::isDeviceValid()
{
   //printf("MpRsOdAlsa::isDeviceValid()\n"); fflush(stdout);
   return ((pDevWrapper != NULL) && pDevWrapper->isDeviceValid());
}

#endif  // _MpodAlsa_h_