comimgff.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 COMIMGFF_H
- #define COMIMGFF_H
- // Forward declarations
- typedef _INTERFACE IHXRequest IHXRequest;
- typedef _INTERFACE IHXFormatResponse IHXFormatResponse;
- typedef _INTERFACE IHXFileObject IHXFileObject;
- typedef _INTERFACE IHXBuffer IHXBuffer;
- typedef _INTERFACE IHXPacket IHXPacket;
- typedef _INTERFACE IHXCommonClassFactory IHXCommonClassFactory;
- class CCommonImageFileFormat : public CHXBaseCountingObject,
- public IHXPlugin,
- public IHXFileFormatObject,
- public IHXFileResponse,
- public IHXFileMimeMapperResponse
- {
- public:
- CCommonImageFileFormat();
- virtual ~CCommonImageFileFormat();
- // IUnknown methods
- STDMETHOD(QueryInterface) (THIS_ REFIID riid, void** ppvObj);
- STDMETHOD_(UINT32,AddRef) (THIS);
- STDMETHOD_(UINT32,Release) (THIS);
- // IHXPlugin methods
- STDMETHOD(GetPluginInfo) (THIS_ REF(BOOL) rbLoadMultiple,
- REF(const char*) rpszDescription,
- REF(const char*) rpszCopyright,
- REF(const char*) rpszMoreInfoURL,
- REF(UINT32) rulVersionNumber);
- STDMETHOD(InitPlugin) (THIS_ IUnknown* pContext);
- // IHXFileFormatObject methods
- STDMETHOD(GetFileFormatInfo) (THIS_ REF(const char**) rppszFileMimeTypes,
- REF(const char**) rppszFileExtensions,
- REF(const char**) rppszFileOpenNames);
- STDMETHOD(InitFileFormat) (THIS_ IHXRequest* pRequest,
- IHXFormatResponse* pFormatResponse,
- IHXFileObject* pFileObject);
- STDMETHOD(GetFileHeader) (THIS);
- STDMETHOD(GetStreamHeader) (THIS_ UINT16 usStreamNum);
- STDMETHOD(GetPacket) (THIS_ UINT16 usStreamNum);
- STDMETHOD(Seek) (THIS_ UINT32 ulRequestedTime);
- STDMETHOD(Close) (THIS);
- // IHXFileResponse methods
- STDMETHOD(InitDone) (THIS_ HX_RESULT status);
- STDMETHOD(SeekDone) (THIS_ HX_RESULT status);
- STDMETHOD(ReadDone) (THIS_ HX_RESULT status, IHXBuffer* pBuffer);
- STDMETHOD(WriteDone) (THIS_ HX_RESULT status);
- STDMETHOD(CloseDone) (THIS_ HX_RESULT status);
- // IHXFileMimeMapperResponse methods
- STDMETHOD(MimeTypeFound) (THIS_ HX_RESULT status, const char* pMimeType);
- // CCommonImageFileFormat methods
- static HX_RESULT STDAPICALLTYPE HXCreateInstance(IUnknown** ppIUnknown);
- protected:
- enum
- {
- kStateReady,
- kStateIFFInitDonePending,
- kStateIFFCloseDonePending,
- kStateIFFMimeTypeFoundPending,
- kStateGSHSeekDonePending,
- kStateGSHReadDonePending,
- kStateGSHCloseDonePending,
- kStateGPSeekDonePending,
- kStateGPReadDonePending,
- kStateGPCloseDonePending,
- kStateSeekInitDonePending,
- kInitialHeaderReadSize = 512,
- kBitrate = 12000,
- kPreroll = 1000,
- kDuration = 5000,
- kPacketSize = 1450
- };
- INT32 m_lRefCount;
- IUnknown* m_pContext;
- IHXFileObject* m_pFileObject;
- IHXFormatResponse* m_pFormatResponse;
- IHXCommonClassFactory* m_pCommonClassFactory;
- IHXFileMimeMapper* m_pFileMimeMapper;
- IHXBuffer* m_pURLStr;
- IHXBuffer* m_pMimeTypeStr;
- UINT32 m_ulState;
- UINT32 m_ulFileOffset;
- UINT32 m_ulDesiredFileOffset;
- UINT32 m_ulRequestedFileOffset;
- UINT32 m_ulHeaderReadSize;
- BOOL m_bFileObjectOpen;
- static const char* const m_pszDescription;
- static const char* const m_pszCopyright;
- static const char* const m_pszMoreInfoURL;
- static const char* const m_ppszFileMimeTypes[];
- static const char* const m_ppszFileExtensions[];
- static const char* const m_ppszFileOpenNames[];
- static const char* const m_ppszStreamMimeType[];
- HX_RESULT ParseWidthHeight(IHXBuffer* pBuffer, BOOL bIsWBMP, REF(UINT32) rulWidth,
- REF(UINT32) rulHeight, REF(UINT32) rulImageType);
- BOOL IsWBMP(IHXBuffer* pMimeTypeStr, IHXBuffer* pURLStr);
- //Start at pBuf and find the next JPEG marker header. Changes pBuf
- //to point to the start of the marker header found and sets
- //ucMarkerType to the marker found. pBuf must not point to a
- //marker on the first call unless you want to skip it.
- BOOL _GetNextJPGMarker( BYTE** pBuf, BYTE* pBufEnd, BYTE* ucMarkerType );
- //Parses the JPEG SOF segments to get the image size.
- BOOL _ParseJPGSOFSegment( BYTE* pBuf,
- BYTE* pBufEnd,
- UINT32& ulWidth,
- UINT32& ulHeight );
- //Looks up segment size
- BOOL _HasSize( BYTE marker );
- BOOL _IsJPEG( BYTE* pBuf, BYTE* pBufEnd );
- };
- #endif /* #ifdef COMIMGFF_H */