www.pudn.com > SoundMixer_Example_v1_0.zip > CMixerThread.h

   /* 
    * 
============================================================================ 
    *  Name     : CMixerThread.h 
    *  Part of  : SoundMixer 
    *  Created  : 03/01/2003 by Forum Nokia 
    *  Description: 
    *     This is the project specification file for SoundMixer. 
    *     Initial content was generated by Series 60 AppWizard. 
    * 
    *  Version  : 1.0.0 
    *  Copyright: Forum Nokia 
    * 
============================================================================ 
    */ 
 
#ifndef __CMIXERTHREAD_H__ 
#define __CMIXERTHREAD_H__ 
 
// INCLUDES 
#include  
#include  
#include  
#include "TAudioShared.h" 
 
// CLASS DECLARATION 
 
/** 
*	CMixerThread is a class which is created to new thread 
*	for performance reasons. This class takes care of mixing 
*	maximum of 16 channels of sampled sound to audio output 
*	stream. Messages between client thread and mixer thread 
*	are handled via exceptions. 
*/ 
 
class CMixerThread 
	: CBase 
	, MMdaAudioOutputStreamCallback 
	{ 
	public: 
 
		/// Thread entry point 
		static TInt ThreadFunction( TAny* aData ); 
 
		/// Default destructor 
		~CMixerThread(); 
		 
	private: 
 
		/// Default constructor 
		/// @param aData data pointer from creator thread 
		CMixerThread( TAny* aData ); 
 
		/// Two phased constructor 
		/// @param aData data pointer from creator thread 
		static CMixerThread* Create( TAny* aData ); 
 
		/// Second phase constructor 
		TInt Construct(); 
 
		/// Second phase constructor which can leave 
		void ConstructL(); 
 
		/// static exception handler function 
		/// @param aExc exception code 
		static void ExcHandler( TExcType aExc ); 
 
		/// exception handler function 
		/// @param aExc exception code 
		void HandleException( TExcType aExc ); 
 
		/// starts mixer 
		void StartMixer(); 
 
		/// stops mixer 
		void StopMixer(); 
 
	private: // MMdaAudioOutputStreamCallback 
		 
		void MaoscPlayComplete( TInt aError ); 
		void MaoscBufferCopied( TInt aError, const TDesC8& aBuffer ); 
		void MaoscOpenComplete( TInt aError ); 
 
 
	private: 
		 
		/// Fill mixing buffer with new data 
		void FillBuffer(); 
 
 
		 
	private: 
 
		CTrapCleanup*			iCleanupStack; 
		CActiveScheduler*		iActiveScheduler; 
		CMdaAudioOutputStream*	iStream; 
		TMdaAudioDataSettings	iSet; 
 
		TInt16*					iBuffer;	// buffer to CMdaAudioOutput 
		TInt*					iMixBuffer;	// 32-bit buffer to mixing 
		TPtrC8					iBufferPtr;	// pointer to iBuffer 
		 
		TInt					iError;		// contains CMdaAudioOutput errors 
 
		TAudioShared&			iShared;	// reference to shared data with client 
 
		// current sample data pointers 
		TInt16* iAudioData[ KMaxChannels ]; 
 
		// These are shifted by KAudioShift 
		TInt iAudioPos[ KMaxChannels ]; 
		TInt iAudioEnd[ KMaxChannels ]; 
		TInt iRepStart[ KMaxChannels ]; 
		TInt iRepEnd[ KMaxChannels ];		 
 
	}; 
 
 
#endif