pxrndcod.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 PXRNDCOD_H
- #define PXRNDCOD_H
- /****************************************************************************
- *
- * Typical Usage of IHXRealPixRendererCodec:
- *
- * Assume: a) We have an image file which is broken up into N contiguous
- * IHXBuffers, labelled buffer 0 to buffer N-1.
- * b) We have already identified the correct codec for our image format
- * by calling GetRendererCodecInfo() and/or ValidInputData().
- * c) The image in the file has F frames, labelled frame 0 through
- * frame F-1
- *
- * 1. Call GetHeaderInfo(), passing in buffer 0
- * 2. Call GetFrameInfo() F times (with ulFrameNum going from 0 to F-1)
- * 3. Allocate F output buffers, each of the appropriate size.
- * 4. Call SetDecompressParam() F times.
- * 5. Call Decompress() N times, passing in buffers 0 through N-1.
- * 6. Call FinishDecompress().
- *
- ****************************************************************************/
- typedef _INTERFACE IHXRealPixRendererCodec IHXRealPixRendererCodec;
- typedef _INTERFACE IHXValues IHXValues;
- #define DECOMPRESS_STATUS_INPROGRESS 0
- #define DECOMPRESS_STATUS_FINISHED 1
- #define DECOMPRESS_STATUS_ABORTED -1
- /****************************************************************************
- *
- * Interface: IHXRealPixRendererCodec
- *
- * Purpose: Interface between RealPix renderer and codec
- *
- * IID_IHXRealPixRendererCodec: {10552E61-C6F1-11d2-8A4F-28909A000000}
- *
- ****************************************************************************/
- DEFINE_GUID(IID_IHXRealPixRendererCodec, 0x10552e61, 0xc6f1, 0x11d2, 0x8a, 0x4f,
- 0x28, 0x90, 0x9a, 0x0, 0x0, 0x0);
- #undef INTERFACE
- #define INTERFACE IHXRealPixRendererCodec
- DECLARE_INTERFACE_(IHXRealPixRendererCodec, IUnknown)
- {
- /*
- * IUnknown methods
- */
- STDMETHOD(QueryInterface) (THIS_ REFIID riid, void **ppvObj) PURE;
- STDMETHOD_(UINT32,AddRef) (THIS) PURE;
- STDMETHOD_(UINT32,Release) (THIS) PURE;
- /*
- * IHXRealPixRendererCodec Methods
- */
- /************************************************************************
- * Method:
- * IHXRealPixRendererCodec::GetRendererCodecInfo()
- * Purpose:
- * Returns the information about the codec: an array of mime types
- * which this codec supports, and the highest supported content and
- * stream version.
- */
- STDMETHOD(GetRendererCodecInfo) (THIS_ REF(const char**) rppszFileMimeType,
- REF(UINT32) rulHighestSupportedContentVersion,
- REF(UINT32) rulHighestSupportedStreamVersion) PURE;
- /************************************************************************
- * Method:
- * IHXRealPixRendererCodec::ValidInputData()
- * Purpose:
- * Determines whether the input buffer contains data which can
- * be decoded by this codec.
- */
- STDMETHOD(ValidInputData) (THIS_ IHXBuffer* pBuffer, REF(BOOL) rbValid) PURE;
- /************************************************************************
- * Method:
- * IHXRealPixRendererCodec::GetHeaderInfo()
- * Purpose:
- * This method passes in the header of the compressed
- * image and finds out information about the image, such as the
- * number of frames. Also, a session handle is
- * returned as an out parameter. This session handle should be used
- * for all successive calls regarding this image.
- * Special-case or codec-specific header info may be returned in rpImageInfo
- * if necessary.
- */
- STDMETHOD(GetHeaderInfo) (THIS_ IHXBuffer* pBuffer,
- IHXBuffer* pOpaqueImageData,
- REF(HXxSize) rImageDim,
- REF(UINT32) rulNumFrames,
- REF(IHXValues*) rpImageInfo,
- REF(UINT32) rulSessionHandle) PURE;
- /************************************************************************
- * Method:
- * IHXRealPixRendererCodec::GetFrameInfo()
- * Purpose:
- * This method finds out information about each
- * frame in a multi-frame image. Special or codec-specific information
- * about each frame may be returned in rpFrameInfo.
- */
- STDMETHOD(GetFrameInfo) (THIS_ UINT32 ulSessionHandle,
- UINT32 ulFrameNum,
- REF(HXxRect) rFrameDim,
- REF(IHXValues*) rpFrameInfo) PURE;
- /************************************************************************
- * Method:
- * IHXRealPixRendererCodec::SetDecompressParam()
- * Purpose:
- * This methods sets the decompression parameters, such as the
- * output width and height. It also sets the output buffer and
- * gives the color and pixel format to which the image should be
- * decoded. Additional codec-specific decompression parameters
- * can be set in pMoreParam.
- */
- STDMETHOD(SetDecompressParam) (THIS_ UINT32 ulSessionHandle,
- UINT32 ulFrameNum,
- IHXBuffer* pOutputBuffer,
- HXxSize cFrameDim,
- UINT32 ulRowStride,
- UINT32 ulBitsPerPixel,
- UINT32 ulColorFormat,
- BOOL bRowsInverted,
- IHXValues* pMoreParam) PURE;
- /************************************************************************
- * Method:
- * IHXRealPixRendererCodec::Decompress()
- * Purpose:
- * This method actually decodes the compressed data in pBuffer into
- * the appropriate output buffer.
- */
- STDMETHOD(Decompress) (THIS_ UINT32 ulSessionHandle,
- IHXBuffer* pBuffer,
- IHXBuffer* pOpaquePacketData) PURE;
- /************************************************************************
- * Method:
- * IHXRealPixRendererCodec::GetDecompressStatus()
- * Purpose:
- * This method gets returns the status of the decompression. If the
- * status returns DECODE_STATUS_INPROGRESS, then decompression is
- * progressing OK and the codec is expecting more data. If the status
- * is DECODE_STATUS_FINISHED, then the end of the image has been
- * reached and the codec is not expecting any more data. If the
- * status is DECODE_STATUS_ABORTED, then the decompression was
- * aborted and the codec will not accept any more data for this
- * decompression session.
- */
- STDMETHOD(GetDecompressStatus) (THIS_ UINT32 ulSessionHandle,
- REF(INT32) rlStatus) PURE;
- /************************************************************************
- * Method:
- * IHXRealPixRendererCodec::FinishDecompress()
- * Purpose:
- * This method informs the codec that the caller is finished
- * with this decompression session and the codec can release
- * any resources allocated for this session. The codec should
- * be prepared to accept FinishDecompress() at any time after
- * GetHeaderInfo().
- */
- STDMETHOD(FinishDecompress) (THIS_ UINT32 ulSessionHandle) PURE;
- };
- #endif