www.pudn.com > helix.src.0812.rar > audio_svr.h

/* ***** BEGIN LICENSE BLOCK *****  
 * Version: RCSL 1.0/RPSL 1.0  
 *   
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.  
 *       
 * The contents of this file, and the files included with this file, are  
 * subject to the current version of the RealNetworks Public Source License  
 * Version 1.0 (the "RPSL") available at  
 * http://www.helixcommunity.org/content/rpsl unless you have licensed  
 * the file under the RealNetworks Community Source License Version 1.0  
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,  
 * in which case the RCSL will apply. You may also obtain the license terms  
 * directly from RealNetworks.  You may not use this file except in  
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks  
 * applicable to this file, the RCSL.  Please see the applicable RPSL or  
 * RCSL for the rights, obligations and limitations governing use of the  
 * contents of the file.   
 *   
 * This file is part of the Helix DNA Technology. RealNetworks is the  
 * developer of the Original Code and owns the copyrights in the portions  
 * it created.  
 *   
 * This file, and the files included with this file, is distributed and made  
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER  
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,  
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS  
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.  
 *  
 * Technology Compatibility Kit Test Suite(s) Location:  
 *    http://www.helixcommunity.org/content/tck  
 *  
 * Contributor(s):  
 *   
 * ***** END LICENSE BLOCK ***** */  
  
/* 
 *  Description:  
 *   
 *  This file contains three class definitions; HXSymbianAudioServer, 
 *  HXSymbianAudioSession, and HXSymbianAudioClient. Their purpose is 
 *  to allow us to hide the Symbian CMdaAudioOutputStream interface. 
 * 
 */ 
#ifndef _AUDIO_SVR_H 
#define _AUDIO_SVR_H 
 
#include  
#include  
#include  
 
#include "hxcom.h" 
#include "hxausvc.h" 
 
/* 
 * class HXSymbianAudioServer 
 * 
 * This class specializes the Symbian OS CServer class in order to 
 * implement a server to respond to requests from one or more clients. 
 */ 
class HXSymbianAudioServer : public CServer { 
public: 
    HXSymbianAudioServer(); 
    virtual ~HXSymbianAudioServer(); 
 
    enum Commands { 
	EAS_Init, 
	EAS_Write, 
	EAS_CancelWrite, 
	EAS_Play, 
	EAS_Pause, 
	EAS_GetTime, 
	EAS_GetBlocksBuffered, 
	EAS_SetVolume, 
	EAS_GetVolume, 
	EAS_GetMaxVolume, 
	EAS_GetMinVolume, 
	EAS_Stop, 
	EAS_RequestDeviceTakenNotification, 
	EAS_CancelDeviceTakenNotification 
    }; 
 
    virtual CSharableSession* NewSessionL(const TVersion& aVersion) const; 
    void AddSession(); 
    void DelSession(); 
    TInt RunError(TInt aError); 
    void NotifyDeviceTaken(); 
 
    static HBufC* AllocServerName(); 
 
private: 
    int m_sessionCount;		// session count 
}; 
 
 
/*  
 * class HXSymbianAudioClient 
 * 
 */ 
class HXSymbianAudioClient : public RSessionBase { 
public: 
    HXSymbianAudioClient(); 
				// initialize audio device 
    TInt Init(int channels, int sampleRate); 
 
    TInt Write(const IHXBuffer* pAudioBuf); 
 
    void Write(const IHXBuffer* pAudioBuf, TRequestStatus& aStatus); 
 
    void CancelWrite(); 
				// get the current time played out in ms 
    TUint GetTime(); 
				// get the number of blocks buffered in device 
    TUint GetBlocksBuffered(); 
				// enable playback 
    TInt Play(); 
				// pause playback 
    void Pause(); 
				// stop playback 
    void Stop(); 
				// returns true if not playing 
    bool Stopped(); 
				// get the current volume 
    TInt GetVolume() const; 
				// get the max volume 
    TInt GetMaxVolume() const; 
				// get the min volume 
    TInt GetMinVolume() const; 
				// set the current volume 
    void SetVolume(TInt volume); 
     
    void RequestDeviceTakenNotification(TRequestStatus& status); 
 
    void CancelDeviceTakenNotification(); 
 
				// start a session with the server 
    TInt Connect(); 
 
private: 
    bool m_stopped; 
}; 
 
#endif // _AUDIO_SVR_H