author | hgs |
Fri, 22 Oct 2010 10:31:17 +0530 | |
changeset 6 | d5507cf6801c |
parent 0 | 5752a19fdefe |
permissions | -rw-r--r-- |
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// Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// |
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#ifndef ImageConversionPlugin_h |
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#define ImageConversionPlugin_h |
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#include <icl/imagedata.h> |
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#include <icl/imagecodec.h> |
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#include <imageconversion.h> |
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#include <icl/imageconversionextension.h> |
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class CImageDecoderPriv; |
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class CImageEncoderPriv; |
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class CImageReadCodec; |
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class CImageWriteCodec; |
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class TBufPtr8; |
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/** |
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@publishedAll |
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@released |
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The PluginAPI for Image Converter Library decoder plugins. |
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Intended for use by plugin writers only. |
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*/ |
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class CImageDecoderPlugin : public CBase |
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{ |
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friend class CImageDecoderPriv; |
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public: |
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IMPORT_C ~CImageDecoderPlugin(); |
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IMPORT_C virtual TInt NumberOfImageComments() const; |
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IMPORT_C virtual HBufC* ImageCommentL(TInt aCommentNumber) const; |
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IMPORT_C virtual TInt NumberOfFrameComments(TInt aFrameNumber) const; |
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IMPORT_C virtual HBufC* FrameCommentL(TInt aFrameNumber, TInt aCommentNumber) const; |
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/** |
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Returns the image type and sub-type for a given frame of the image that |
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has just been opened. |
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This is a virtual function that each individual plugin must implement. |
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@param aFrameNumber |
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The frame index for type and sub-type information should be returned. |
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@param aImageType |
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On return contains the image type UID for the specified frame. |
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@param aImageSubType |
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On return contains the image sub-type UID for the specified frame. If the sub-type does |
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not exist KNullUid is returned. |
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*/ |
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virtual void ImageType(TInt aFrameNumber, TUid& aImageType, TUid& aImageSubType) const = 0; |
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protected: |
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IMPORT_C CImageDecoderPlugin(); |
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IMPORT_C virtual void Cleanup(); |
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IMPORT_C virtual void ReadFrameHeadersL(); |
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/** |
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Invokes the ReadFrameHeadersL() method of the supplied plugin. |
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The plugin's version of ReadFrameHeadersL() should read the image header information, create |
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the required codec and read the frame headers. |
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This is a virtual function that each individual plugin must implement. |
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*/ |
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virtual void ScanDataL() = 0; |
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IMPORT_C virtual TInt FrameHeaderBlockSize(TInt aFrameNumber) const; |
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IMPORT_C virtual TInt FrameBlockSize(TInt aFrameNumber) const; |
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/** |
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Returns the codec specific frame information stored in resource files. |
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This is a virtual function that each individual plugin must implement. |
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@param aFs |
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A handle to a file server session. |
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@param aFrameNumber |
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The frame number to which the codec specific frame information |
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applies (optional, defaults to zero). |
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@return A pointer to a newly allocated CFrameInfoStrings object. |
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Ownership is transferred to the caller. |
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*/ |
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IMPORT_C virtual CFrameInfoStrings* FrameInfoStringsL(RFs& aFs, TInt aFrameNumber = 0) = 0; |
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IMPORT_C void OpenExtraResourceFileLC(RFs& aFs, const TUid aUid, RResourceFile& aResourceFile) const; |
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IMPORT_C void ReadDataL(TInt aPosition, TPtrC8& aReadBuffer, TInt aLength); |
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IMPORT_C virtual void InitConvertL(); |
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IMPORT_C void RequestInitL(TInt aFrameNumber); |
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IMPORT_C virtual void DoConvert(); |
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IMPORT_C void PrepareForProcessFrameL(); |
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IMPORT_C void HandleProcessFrameResult(TInt aErrCode, TFrameState aCodecState); |
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IMPORT_C TBufPtr8& SourceData(); |
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IMPORT_C void RequestComplete(TInt aReason); |
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IMPORT_C void SelfComplete(TInt aReason); |
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IMPORT_C void SetSelfPending(); |
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IMPORT_C TBool IsImageHeaderProcessingComplete() const; |
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IMPORT_C CImageReadCodec* ImageReadCodec() const; |
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IMPORT_C void SetImageReadCodec(CImageReadCodec* aImageReadCodec); |
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IMPORT_C const TFrameInfo& ImageInfo() const; |
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IMPORT_C void SetImageInfo(const TFrameInfo& aImageInfo); |
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IMPORT_C TInt NumberOfFrames() const; |
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IMPORT_C const TImageDataBlock* ImageData(TInt aIndex) const; |
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IMPORT_C TInt InsertImageData(const TImageDataBlock* aEntry, TInt aPos); |
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IMPORT_C TInt AppendImageData(const TImageDataBlock* aEntry); |
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IMPORT_C void RemoveImageData(TInt aPos); |
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IMPORT_C TInt ImageDataCount() const; |
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IMPORT_C TInt AppendImageDataBuffer(const HBufC8* aImageBuffer); |
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IMPORT_C TInt DataLength() const; |
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IMPORT_C void SetDataLength(TInt aDataLength); |
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IMPORT_C TInt Position() const; |
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IMPORT_C void SetPosition(const TInt aPosition); |
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IMPORT_C TInt StartPosition() const; |
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IMPORT_C void SetStartPosition(TInt aDataLength); |
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IMPORT_C const CFbsBitmap& Destination() const; |
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IMPORT_C TBool ValidDestination() const; |
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IMPORT_C const CFbsBitmap& DestinationMask() const; |
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IMPORT_C TBool ValidDestinationMask() const; |
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IMPORT_C const TFrameInfo& FrameInfo(TInt aFrameNumber = 0) const; |
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IMPORT_C const CFrameImageData& FrameData(TInt aFrameNumber = 0) const; |
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IMPORT_C TInt SourceLength() const; |
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IMPORT_C virtual void HandleCustomSyncL(TInt aParam); |
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IMPORT_C virtual void InitCustomAsyncL(TInt aParam); |
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IMPORT_C virtual void NotifyComplete(); |
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IMPORT_C TBool AmInThread() const; |
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IMPORT_C TBool ShouldAbort() const; |
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IMPORT_C void SetThumbnailData(HBufC8* aThumbnailData); |
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IMPORT_C CImageDecoder::TOptions DecoderOptions() const; |
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private: |
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TBool ValidProperties() const; |
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IMPORT_C virtual void EnableMaskGeneration(); |
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IMPORT_C virtual void NotifyImageTypeChangeL(TInt aImageType); |
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// Future proofing |
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IMPORT_C virtual void ReservedVirtual1(); |
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public: |
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/** |
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@publishedAll |
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@released |
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Called by the framework to obtain a pointer to a codec implemented extension. |
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@param aExtUid Extension UID normally prefixed KUidImageConv. @see icl_uids.hrh . |
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@param aExtPtr Returns a ptr to the extension implemented by the codec plugin. |
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*/ |
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IMPORT_C virtual void GetExtensionL(TUid aExtUid, MImageConvExtension*& aExtPtr); |
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/** |
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@publishedAll |
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@released |
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Called by the framework on the plugin to apply a clipping rectangle to the image. |
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Sets the area of interest of the image to be decoded. |
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@param aClipRect A pointer to a TRect that specifies the |
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location and size of the region to be decoded. This |
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rectangle must have positive width and height values as |
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per TRect::IsNormalized() and TRect::Normalize(). |
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Passing in a NULL value will clear the clipping rectangle. |
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Note that a clipping rectangle may not be valid for all frames of an image. |
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@leave KErrNotSupported if clipping is not supported by the codec plugin. |
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@leave Other system-wide error codes. |
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*/ |
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IMPORT_C virtual void SetClippingRectL(const TRect* aClipRect); |
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/** |
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@publishedAll |
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@released |
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Called by framework on plugin to get the size of decoded image. |
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Get the size of the decoded image for the given frame. The calculation will account for any clipping rectangle set, |
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scaling applied through the TImageConvScaler extension and any operation applied through TImageConvOperation. |
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If TImageConvScaler::SetScalingL(.. has been called then the size of the bitmap passed to CImageDecoder::Convert must match the size returned from |
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this function. |
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@param aSize |
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Returns the size of the decoded image. |
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@param aFrameNumber |
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The frame number. |
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@return KErrArgument if an error in calculation is detected e.g. if clipping rectangle is outside of the overall frame boundary. |
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@return Other system wide errors. |
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*/ |
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IMPORT_C virtual TInt GetDestinationSize(TSize& aSize, TInt aFrameNumber = 0); |
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private: |
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CImageDecoderPriv* iProperties; // not owned |
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friend class RCImageDecoderPrivTestBase; |
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}; |
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/** |
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@publishedAll |
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@released |
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The plugin API for Image Converter Library encoder plugins. |
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Intended for use by plugin writers only. |
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*/ |
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class CImageEncoderPlugin : public CBase |
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{ |
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friend class CImageEncoderPriv; |
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public: |
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IMPORT_C ~CImageEncoderPlugin(); |
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protected: |
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IMPORT_C CImageEncoderPlugin(); |
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IMPORT_C virtual void Cleanup(); |
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IMPORT_C virtual void InitConvertL(); |
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IMPORT_C void RequestInitL(); |
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IMPORT_C virtual void DoConvert(); |
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IMPORT_C void HandleProcessFrameResult(TInt aErrCode, TFrameState aCodecState); |
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IMPORT_C TBufPtr8& DestinationData(); |
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IMPORT_C void FinishConvertL(); |
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IMPORT_C void WriteDataL(TInt aPosition,const TDesC8& aDes); |
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IMPORT_C void WriteDataPositionIncL(TInt aPosition,const TDesC8& aDes); |
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IMPORT_C const CFbsBitmap& Source() const; |
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IMPORT_C TBool ValidSource() const; |
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IMPORT_C CImageWriteCodec* ImageWriteCodec() const; |
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IMPORT_C void SetImageWriteCodec(CImageWriteCodec* aImageWriteCodec) const; |
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IMPORT_C TInt& StartPosition() const; |
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IMPORT_C TInt& Position() const; |
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IMPORT_C const TSize& FrameInfoOverallSizeInPixels() const; |
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/** |
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Allocates the specific codec used for the encoding and passes |
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ownership to the plugin. |
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This is a pure virtual function that each individual plugin must implement. |
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@param aFrameImageData |
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The parameters which can be passed on to the encoding algorithm. |
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This data might be used to determine the exact codec created. |
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@return An error code indicating if the function call was successful. KErrNone on success, otherwise |
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another of the system-wide error codes. |
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*/ |
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virtual void PrepareEncoderL(const CFrameImageData* aFrameImageData) = 0; |
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/** |
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May be used to fill in additional fields at the end of the encoding |
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process, which it may not have been possible to do earlier. |
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This is a pure virtual function that each individual plugin must implement. |
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*/ |
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virtual void UpdateHeaderL() = 0; |
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IMPORT_C TInt CurrentImageSizeL() const; |
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IMPORT_C void RequestComplete(TInt aReason); |
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IMPORT_C void SelfComplete(TInt aReason); |
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IMPORT_C void SetSelfPending(); |
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IMPORT_C virtual void HandleCustomSyncL(TInt aParam); |
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IMPORT_C virtual void InitCustomAsyncL(TInt aParam); |
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IMPORT_C virtual void NotifyComplete(); |
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IMPORT_C TBool AmInThread() const; |
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IMPORT_C TBool ShouldAbort() const; |
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IMPORT_C CImageEncoder::TOptions EncoderOptions() const; |
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private: |
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TBool ValidProperties() const; |
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IMPORT_C virtual void WriteThumbnailL(); |
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/** |
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Originally only used by the jpeg codec, but now in use as a generic pre-convert async step |
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*/ |
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IMPORT_C virtual void WriteExifDataL(TRequestStatus*& aScaleCompletionStatus); |
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IMPORT_C virtual void SetThumbnail(TBool aDoGenerateThumbnail); |
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IMPORT_C virtual void ReservedVirtual1(); |
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IMPORT_C virtual void ReservedVirtual2(); |
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IMPORT_C virtual void ReservedVirtual3(); |
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public: |
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/** |
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@publishedAll |
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@released |
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Called by the framework to obtain a pointer to a codec implemented extension. |
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@param aExtUid Extension UID normally prefixed KUidImageConv. @see icl_uids.hrh . |
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@param aExtPtr. Returns a ptr to the extension implemented by the codec plugin. |
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*/ |
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IMPORT_C virtual void GetExtensionL(TUid aExtUid, MImageConvExtension*& aExtPtr); |
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private: |
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CImageEncoderPriv* iProperties; // not owned |
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}; |
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#endif //ImageConversionPlugin_h |
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