hxaudev.h
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上传日期:2007-06-06
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- /* ***** 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 ***** */
- #ifndef _HXAUDEV_H_
- #define _HXAUDEV_H_
- #include "hxprefs.h"
- // forward decls
- struct IHXAudioDeviceResponse;
- struct IHXScheduler;
- class CHXAudioSession;
- typedef struct _HXAudioFormat HXAudioFormat;
- typedef struct _HXAudioData HXAudioData;
- typedef enum device_state
- {
- E_DEV_CLOSED,
- E_DEV_OPENED,
- E_DEV_PAUSED,
- E_DEV_RESUMED
- } E_DEVICE_STATE;
- /****************************************************************************
- *
- * Class:
- *
- * CHXAudioDevice
- *
- * Purpose:
- *
- * PN implementation of audio device object.
- *
- */
- class CHXAudioDevice: public IHXAudioDevice
- {
- private:
- LONG32 m_lRefCount;
- BOOL m_bBuffer;
- HX_RESULT m_wLastError;
- IHXAudioDeviceResponse* m_pDeviceResponse;
- protected:
- IUnknown* m_pContext; // context.
- UINT16 m_uMinVolume; // Client's min volume
- UINT16 m_uMaxVolume; // Client's max volume
- UINT16 m_uCurVolume; // Current volume
- UINT16 m_uSampFrameSize; // Frame size.
- HXAudioFormat m_AudioFmt; // Device format
- BOOL m_bPaused; // Whether device is supposed to be paused!
- ULONG32 m_ulCurrentTime;
- ULONG32 m_ulLastSysTime;
- ULONG32 m_ulGranularity;
- ULONG32 m_ulBytesPerGran;
- IHXScheduler* m_pScheduler;
- E_DEVICE_STATE m_eState;
- char* m_pdevName;
- virtual HX_RESULT _Imp_Open(const HXAudioFormat* pAudioFormat ) = 0;
- virtual HX_RESULT _Imp_Close(void) = 0;
- virtual HX_RESULT _Imp_Seek(ULONG32 ulSeekTime) = 0;
- virtual HX_RESULT _Imp_Pause(void) = 0;
- virtual HX_RESULT _Imp_Resume(void) = 0;
- virtual HX_RESULT _Imp_Write(const HXAudioData* pAudioData) = 0;
- virtual BOOL _Imp_SupportsVolume(void) = 0;
- virtual HX_RESULT _Imp_SetVolume(const UINT16 uVolume) = 0;
- virtual UINT16 _Imp_GetVolume(void) = 0;
- virtual HX_RESULT _Imp_Reset(void) = 0;
- virtual HX_RESULT _Imp_Drain(void) = 0;
- virtual HX_RESULT _Imp_CheckFormat(const HXAudioFormat* pAudioFormat) = 0;
- virtual HX_RESULT _Imp_GetCurrentTime(ULONG32& ulCurrentTime) = 0;
- virtual INT16 _Imp_GetAudioFd(void) = 0;
- virtual UINT16 _NumberOfBlocksRemainingToPlay(void) = 0;
- virtual BOOL _IsWaveOutDevice(void);
- virtual ~CHXAudioDevice();
- PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME
- //This give the audio devices a chance to init themselves after
- //the context has been set. This is called from Init() and defaults
- //to a noop.
- virtual void _initAfterContext();
-
- public:
- char* getDevName(void)
- {
- return m_pdevName;
- }
- static CHXAudioDevice *Create(IHXPreferences* pPrefs);
- CHXAudioDevice()
- : m_lRefCount(0)
- , m_pDeviceResponse(0)
- , m_uMinVolume(0)
- , m_uMaxVolume(0)
- , m_uCurVolume(0)
- , m_uSampFrameSize(0)
- , m_ulCurrentTime(0)
- , m_ulLastSysTime(0)
- , m_ulGranularity(0)
- , m_ulBytesPerGran(0)
- , m_bPaused(0)
- , m_pScheduler(0)
- , m_pContext(0)
- , m_eState(E_DEV_CLOSED)
- , m_pdevName(0)
- {
- };
- /* This function calls GetCurrentAudioTime() to get the
- * an accurate time from the audio playback system.
- */
- HX_RESULT OnTimeSync();
- /* A HACK until GetCurrentTime() is implemented.
- */
- void SetGranularity(ULONG32 ulGranularity, ULONG32 ulBytesPerGran)
- {
- m_ulGranularity = ulGranularity;
- m_ulBytesPerGran = ulBytesPerGran;
- };
- /*
- * IUnknown methods
- */
- STDMETHOD(QueryInterface) (THIS_
- REFIID riid,
- void** ppvObj);
- STDMETHOD_(ULONG32,AddRef) (THIS);
- STDMETHOD_(ULONG32,Release) (THIS);
- void Init(IUnknown* pContext);
- /*
- * IHXAudioDevice methods
- */
- STDMETHOD(Open) (THIS_
- const HXAudioFormat* pAudioFormat,
- IHXAudioDeviceResponse* pDeviceResponse
- );
- STDMETHOD(Close) (THIS_
- const BOOL bFlush ) ;
- STDMETHOD(Pause) (THIS);
- STDMETHOD(Resume) (THIS);
- STDMETHOD(Write) (THIS_
- const HXAudioData* pAudioData
- );
- STDMETHOD(SetBuffering) (THIS_
- const BOOL bSetBuffering) ;
- STDMETHOD_(BOOL,InitVolume) (THIS_
- const UINT16 uMinVolume,
- const UINT16 uMaxVolume) ;
- STDMETHOD(SetVolume) (THIS_
- const UINT16 uVolume) ;
- STDMETHOD_(UINT16,GetVolume) (THIS);
- STDMETHOD(Reset) (THIS);
- STDMETHOD(Drain) (THIS);
- STDMETHOD(CheckFormat) (THIS_
- const HXAudioFormat* pAudioFormat);
- /* This function returns the most accurate audio playback time
- * that can be ascertained from platform specific calls.
- */
- STDMETHOD(GetCurrentAudioTime) (THIS_
- REF(ULONG32) ulCurrentTime);
- STDMETHOD(GetAudioFd) (THIS);
- HX_RESULT Seek( UINT32 ulSeekTime);
-
- E_DEVICE_STATE GetState(void)
- {
- return m_eState;
- };
- UINT16 NumberOfBlocksRemainingToPlay();
- BOOL IsWaveOutDevice();
- };
- #endif /* HXAUDEV_H_ */