audio_session-mmf.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: audio_session-mmf.h,v 1.1.2.2 2004/07/09 02:01:33 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
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 * The contents of this file, and the files included with this file,
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 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
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 * will apply. You may also obtain the license terms directly from
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 * This file is part of the Helix DNA Technology. RealNetworks is the
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 * ***** END LICENSE BLOCK ***** */

#ifndef _AUDIO_SESSION_H_
#define _AUDIO_SESSION_H_

#include <e32base.h>
#include <e32des8.h>
#include <stdio.h>
#include <SoundDevice.h>

#include "../audio_svr.h"
#include "hxslist.h"

class CHXSimpleList;

class HXSymbianAudioSession : public CSession, public MDevSoundObserver
{ 
  public:
    HXSymbianAudioSession(RThread& client, HXSymbianAudioServer* pServer);
    virtual ~HXSymbianAudioSession();

    static HXSymbianAudioSession* NewL(RThread& client,
                                       HXSymbianAudioServer* pServer);
    virtual void ServiceL(const RMessage& mesg);
    void NotifyDeviceTaken();

  protected:
    void Init();
    void Play();
    void Pause();
    void Write();
    void GetTime();
    void GetBlocksBuffered();
    void SetVolume();
    void GetVolume();
    void GetMaxVolume();
    void GetMinVolume();
    void Stop();

    void RequestDeviceTakenNotification();
    void CancelDeviceTakenNotification();

    //MDevSoundObserver callbacks
    void InitializeComplete(TInt aError);
    void BufferToBeFilled(CMMFBuffer* aBuffer);
    void PlayError(TInt aError);
    void BufferToBeEmptied(CMMFBuffer* aBuffer);
    void RecordError(TInt aError);
    void ConvertError(TInt aError);
    void DeviceMessage(TUid aMessageType, const TDesC8& aMsg);
    void ToneFinished(TInt aError);
    void SendEventToClient(const TMMFEvent& aEvent);
    

    void DoCleanup();

    UINT32 GetByteRate() const;
    UINT32 GetDeviceMs();

    BOOL ReadyToWrite() const;
    TInt WriteNextBuffer();

  private:
    
    HXSymbianAudioServer* m_pServer;    
    
    RMessage m_notifyRequest;
    RMessage m_InitMessage;
    bool     m_wantsNotify;
    TInt     m_reason;
    bool     m_open;

    CHXSimpleList     m_bufferList;
    BOOL              m_bPaused;
    CMMFDevSound*     m_pStream;
    TMMFCapabilities  m_Settings;
    TDes8*            m_pDataDesc;
    BOOL              m_bNeedBufferFilled;
    CMMFBuffer*       m_pData;
    BOOL              m_bBufferNeedsFilling;
    BOOL              m_bPlayInited;
    ULONG32           m_ulFirstTimeStamp;
    UINT              m_uSampleRate;
    ULONG32           m_ulPauseTime;
    ULONG32           m_ulStartTime;
    TInt              m_nLastSampleCount;
    TInt              m_nUnderflowSampleCount;
};

#endif // _AUDIO_SESSION_H_