audrend.h
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:15k
- /* ***** 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 _AUDREND_H_
- #define _AUDREND_H_
- /****************************************************************************
- * Includes
- */
- #include "audrendf.h"
- #include "hxplugn.h"
- #include "hxrendr.h"
- #include "hxasm.h"
- #include "hxmon.h"
- #include "hxcore.h"
- #include "hxtick.h"
- #include "hxerror.h"
- #include "audstats.h"
- #define AUDREND_INITIAL_NUMSTREAMPTRS 4
- /****************************************************************************
- * CAudioRenderer
- */
- class CAudioRenderer : public IHXPlugin,
- public IHXRenderer,
- public IHXStatistics,
- public IHXInterruptSafe,
- public IHXDryNotification
- {
- protected:
- typedef enum
- {
- stopped,
- buffering,
- playing,
- paused,
- seeking
- } PlayState;
-
- static const char* const zm_pDescription;
- static const char* const zm_pCopyright;
- static const char* const zm_pMoreInfoURL;
- static const char* const zm_pStreamMimeTypes[];
- HX_RESULT InitAudioStream (IHXValues* pHeader,
- IHXAudioStream** ppAudioStream);
- HX_RESULT DoAudio (UINT32 &ulAudioTime,
- AUDIO_STATE audioState = AUDIO_NORMAL);
- HX_RESULT WriteToAudioServices (HXAudioData* pAudioData);
- HX_RESULT AttemptToSatisfyDryRequest (UINT32 ulAudioTimeWanted);
- void CalculateMaxTimeStamp(HXAudioData* pAudioData);
- HX_RESULT CheckForAudioStreamChange(REF(BOOL) rbAudioStreamChanged);
- BOOL HasAudioFormatChanged();
- HX_RESULT IncrementAudioStream();
- BOOL IsRebuffering() const;
- void StartRebuffer(UINT32 ulAudioWantedTime);
- void EndRebuffer();
- IHXAudioPlayer* m_pAudioPlayer;
- IHXAudioStream** m_ppAudioStream;
- UINT32 m_ulNumAudioStreams;
- UINT32 m_ulCurAudioStream;
-
- UINT32 m_ulPreroll;
- UINT32 m_ulDelay;
- UINT32 m_ulDuration;
- UINT32 m_ulAudioWantedTime;
- UINT32 m_ulLastWriteTime;
- UINT32 m_ulBaseWriteTime;
- INT32 m_lTimeOffset;
- PlayState m_PlayState;
-
- HX_BITFIELD m_bDoneWritingPackets:1;
- HX_BITFIELD m_bEndOfPackets:1;
- HX_BITFIELD m_bProcessingPacket:1;
- HX_BITFIELD m_bInSeekMode:1;
- HX_BITFIELD m_bFirstPacket:1;
- HX_BITFIELD m_bDelayOffsetSet:1;
- HX_BITFIELD m_bCanChangeAudioStream : 1;
- HXMutex* m_pMutex;
- HX_RESULT CheckStreamVersions (IHXValues* pHeader);
- virtual HX_RESULT CheckAudioServices() {return HXR_OK;}
- public:
- /*
- * Costructor
- */
- CAudioRenderer();
- /*
- * IUnknown methods
- */
- STDMETHOD(QueryInterface) (THIS_
- REFIID riid,
- void** ppvObj);
- STDMETHOD_(UINT32,AddRef) (THIS);
- STDMETHOD_(UINT32,Release) (THIS);
- /*
- * IHXPlugin methods
- */
- /************************************************************************
- * Method:
- * IHXPlugin::GetPluginInfo
- * Purpose:
- * Returns the basic information about this plugin. Including:
- *
- * bLoadMultiple whether or not this plugin DLL can be loaded
- * multiple times. All File Formats must set
- * this value to TRUE.
- * pDescription which is used in about UIs (can be NULL)
- * pCopyright which is used in about UIs (can be NULL)
- * pMoreInfoURL which is used in about UIs (can be NULL)
- */
- STDMETHOD(GetPluginInfo) (THIS_
- REF(BOOL) /*OUT*/ bLoadMultiple,
- REF(const char*) /*OUT*/ pDescription,
- REF(const char*) /*OUT*/ pCopyright,
- REF(const char*) /*OUT*/ pMoreInfoURL,
- REF(ULONG32) /*OUT*/ ulVersionNumber
- );
- /************************************************************************
- * Method:
- * IHXPlugin::InitPlugin
- * Purpose:
- * Initializes the plugin for use. This interface must always be
- * called before any other method is called. This is primarily needed
- * so that the plugin can have access to the context for creation of
- * IHXBuffers and IMalloc.
- */
- STDMETHOD(InitPlugin) (THIS_
- IUnknown* /*IN*/ pContext);
-
- /*
- * IHXRenderer methods
- */
- /************************************************************************
- * Method:
- * IHXRenderer::GetRendererInfo
- * Purpose:
- * Returns information vital to the instantiation of rendering
- * plugins.
- */
- STDMETHOD(GetRendererInfo) (THIS_
- REF(const char**) /*OUT*/ pStreamMimeTypes,
- REF(UINT32) /*OUT*/ unInitialGranularity
- );
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::StartStream
- // Purpose:
- // Called by client engine to inform the renderer of the stream it
- // will be rendering. The stream interface can provide access to
- // its source or player. This method also provides access to the
- // primary client controller interface.
- //
- STDMETHOD (StartStream) (THIS_
- IHXStream* pStream,
- IHXPlayer* pPlayer);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::EndStream
- // Purpose:
- // Called by client engine to inform the renderer that the stream
- // is was rendering is closed.
- //
- STDMETHOD (EndStream) (THIS);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::OnHeader
- // Purpose:
- // Called by client engine when a header for this renderer is
- // available. The header will arrive before any packets.
- //
- STDMETHOD (OnHeader) (THIS_
- IHXValues* pHeader);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::OnPacket
- // Purpose:
- // Called by client engine when a packet for this renderer is
- // due.
- //
- STDMETHOD (OnPacket) (THIS_
- IHXPacket* pPacket,
- LONG32 lTimeOffset);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::OnTimeSync
- // Purpose:
- // Called by client engine to inform the renderer of the current
- // time relative to the streams synchronized time-line. The
- // renderer should use this time value to update its display or
- // render it's stream data accordingly.
- //
- STDMETHOD (OnTimeSync) (THIS_
- ULONG32 ulTime);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::OnPreSeek
- // Purpose:
- // Called by client engine to inform the renderer that a seek is
- // about to occur. The render is informed the last time for the
- // stream's time line before the seek, as well as the first new
- // time for the stream's time line after the seek will be completed.
- //
- STDMETHOD (OnPreSeek) (THIS_
- ULONG32 ulOldTime,
- ULONG32 ulNewTime);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::OnPostSeek
- // Purpose:
- // Called by client engine to inform the renderer that a seek has
- // just occured. The render is informed the last time for the
- // stream's time line before the seek, as well as the first new
- // time for the stream's time line after the seek.
- //
- STDMETHOD (OnPostSeek) (THIS_
- ULONG32 ulOldTime,
- ULONG32 ulNewTime);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::OnPause
- // Purpose:
- // Called by client engine to inform the renderer that a pause has
- // just occured. The render is informed the last time for the
- // stream's time line before the pause.
- //
- STDMETHOD (OnPause) (THIS_
- ULONG32 ulTime);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::OnBegin
- // Purpose:
- // Called by client engine to inform the renderer that a begin or
- // resume has just occured. The render is informed the first time
- // for the stream's time line after the resume.
- //
- STDMETHOD (OnBegin) (THIS_
- ULONG32 ulTime);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::OnBuffering
- // Purpose:
- // Called by client engine to inform the renderer that buffering
- // of data is occuring. The render is informed of the reason for
- // the buffering (start-up of stream, seek has occured, network
- // congestion, etc.), as well as percentage complete of the
- // buffering process.
- //
- STDMETHOD (OnBuffering) (THIS_
- ULONG32 ulFlags,
- UINT16 unPercentComplete);
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IHXRenderer::GetDisplayType
- // Purpose:
- // Called by client engine to ask the renderer for it's preferred
- // display type. When layout information is not present, the
- // renderer will be asked for it's prefered display type. Depending
- // on the display type a buffer of additional information may be
- // needed. This buffer could contain information about preferred
- // window size.
- //
- STDMETHOD (GetDisplayType) (THIS_
- REF(HX_DISPLAY_TYPE) ulFlags,
- REF(IHXBuffer*) pBuffer);
- /************************************************************************
- * Method:
- * IHXRenderer::OnEndofPackets
- * Purpose:
- * Called by client engine to inform the renderer that all the
- * packets have been delivered. However, if the user seeks before
- * EndStream() is called, renderer may start getting packets again
- * and the client engine will eventually call this function again.
- */
- STDMETHOD(OnEndofPackets) (THIS);
-
- /*
- * IHXDryNotification methods
- */
- /************************************************************************
- * Method:
- * IHXDryNotificationOnDryNotification
- * Purpose:
- * This function is called when it is time to write to audio device
- * and there is not enough data in the audio stream. The renderer can
- * then decide to add more data to the audio stream. This should be
- * done synchronously within the call to this function.
- * It is OK to not write any data. Silence will be played instead.
- */
- STDMETHOD(OnDryNotification) (THIS_
- UINT32 /*IN*/ ulCurrentStreamTime,
- UINT32 /*IN*/ ulMinimumDurationRequired);
- /*
- * IHXStatistics methods
- */
- STDMETHOD(InitializeStatistics) (THIS_ UINT32 ulRegistryID);
- STDMETHOD(UpdateStatistics) (THIS);
- /*
- * IHXInterruptSafe methods
- */
- /************************************************************************
- * Method:
- * IHXInterruptSafe::IsInterruptSafe
- * Purpose:
- * This is the function that will be called to determine if
- * interrupt time execution is supported.
- */
- STDMETHOD_(BOOL,IsInterruptSafe) (THIS)
- { return TRUE; };
- IUnknown* GetContext(void)
- {
- return m_pContext;
- }
- static LONG32 CmpTime(ULONG32 ulTime1, ULONG32 ulTime2)
- {
- return ((LONG32) (ulTime1 - ulTime2));
- }
- /************************************************************************
- * Public Statistics Methods
- */
- #if defined(HELIX_FEATURE_STATS)
- HX_RESULT ReportStat(AudioStatEntryID eEntryID, char* pVal)
- {
- return m_pAudioStats->ReportStat(eEntryID, pVal);
- }
-
- HX_RESULT ReportStat(AudioStatEntryID eEntryID, INT32 lVal)
- {
- return m_pAudioStats->ReportStat(eEntryID, lVal);
- }
- #else // HELIX_FEATURE_STATS
- HX_RESULT ReportStat(AudioStatEntryID eEntryID, char* pVal)
- {
- return HXR_OK;
- }
-
- HX_RESULT ReportStat(AudioStatEntryID eEntryID, INT32 lVal)
- {
- return HXR_OK;
- }
- #endif // HELIX_FEATURE_STATS
- protected:
- virtual ~CAudioRenderer();
- /*
- * Renderer's customizable fuctions - can be called any time
- */
- /*
- * Fixed Renderer Configuration - must be callable at any time
- */
- virtual const char* GetUpgradeMimeType(void);
- virtual const char* GetRendererName(void);
- virtual const char* GetCodecName(void);
- virtual const char* GetCodecFourCC(void);
- /*
- * Renderer Configuration - must be callable any time
- * after reception of the header
- */
- virtual void GetStreamVersion(ULONG32 &ulThisMajorVersion,
- ULONG32 &ulThisMinorVersion);
- virtual void GetContentVersion(ULONG32 &ulThisMajorVersion,
- ULONG32 &ulThisMinorVersion);
- virtual CAudioFormat* CreateFormatObject(IHXValues* pHeader);
- /*
- * Renderer's member variables sharable with the derived renderer
- */
- IUnknown* m_pContext;
- IHXStream* m_pStream;
- IHXBackChannel* m_pBackChannel;
- IHXValues* m_pHeader;
- IHXErrorMessages* m_pErrorMessages;
- IHXCommonClassFactory* m_pCommonClassFactory;
- IHXPreferences* m_pPreferences;
- IHXRegistry* m_pRegistry;
- ULONG32 m_ulRegistryID;
- CAudioFormat* m_pAudioFormat;
- #if defined(HELIX_FEATURE_STATS)
- CAudioStatistics* m_pAudioStats;
- #else
- void* m_pAudioStats;
- #endif /* HELIX_FEATURE_STATS */
- LONG32 m_lRefCount;
- };
- #endif // _AUDREND_H_