camappengine/StillConverter/Inc/CaeStillDecoder.h
changeset 15 50d5061ee01e
parent 14 34024902876b
child 17 880d946921e4
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14:34024902876b 15:50d5061ee01e
     1 /*
       
     2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).
       
     3 * All rights reserved.
       
     4 * This component and the accompanying materials are made available
       
     5 * under the terms of "Eclipse Public License v1.0"
       
     6 * which accompanies this distribution, and is available
       
     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8 *
       
     9 * Initial Contributors:
       
    10 * Nokia Corporation - initial contribution.
       
    11 *
       
    12 * Contributors:
       
    13 *
       
    14 * Description:  Still Image Decoder for Camera Application Engine
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 
       
    20 #ifndef CAESTILLDECODER_H
       
    21 #define CAESTILLDECODER_H
       
    22 
       
    23 // INCLUDES
       
    24 #include <e32base.h>
       
    25 #include <s32file.h>
       
    26 #include <imageconversion.h>
       
    27 #include <ecam.h>
       
    28 
       
    29 
       
    30 // CLASS DECLARATION
       
    31 
       
    32 /**
       
    33 *  Still decoder observer class.
       
    34 *  User of CCaeStillDecoder class must derive from this interface.
       
    35 *
       
    36 * @lib CAESTILLCONVERTER.LIB
       
    37 * @since 2.1
       
    38 */
       
    39 class MCaeStillDecoderObserver
       
    40     {
       
    41     public:
       
    42         /**
       
    43         * Called back by CCaeStillDecoder when it completes conversion (decoding) to CFbsBitmap image.
       
    44         * @since 2.1
       
    45         * @param aImageData Source image (as JPEG)
       
    46         * @param aBitmap Converted Symbian OS bitmap image
       
    47         * @param aError Error code KErrNone to indicate success or a standard Symbian OS error code
       
    48         * @param aImageSize Decoded image size
       
    49         * @return void
       
    50         */
       
    51         virtual void McaesdoCFbsBitmapImageReady( 
       
    52             HBufC8* aImageData, 
       
    53             CFbsBitmap* aBitmap, 
       
    54             TInt aError,
       
    55             TInt aImageSize ) = 0;
       
    56     };
       
    57 
       
    58 
       
    59 // CLASS DECLARATION
       
    60 
       
    61 /**
       
    62 * Still Decoder class.
       
    63 * Implements still image decoding for Camera Application Engine 
       
    64 * using Symbian Image Conversion Library (ICL)
       
    65 *
       
    66 * @lib CAESTILLCONVERTER.LIB
       
    67 * @since 2.1
       
    68 */
       
    69 NONSHARABLE_CLASS( CCaeStillDecoder ) : public CCaeStillConverter
       
    70     {
       
    71     public:  // Constructor and destructor    
       
    72         /**
       
    73         * Two-phased constructor.
       
    74         */
       
    75         IMPORT_C static CCaeStillDecoder* NewL();
       
    76 
       
    77         /**
       
    78         * Destructor.
       
    79         */
       
    80         IMPORT_C virtual ~CCaeStillDecoder();
       
    81 
       
    82     public: // From CCaeStillConverter:
       
    83 
       
    84         void SetImageCodecL( 
       
    85         	TUid aCodecUid );
       
    86         	
       
    87     public: // New functions
       
    88         /**
       
    89         * Sets Still Decoder observer.
       
    90         * @since 2.1
       
    91         * @param aObserver Still Decoder observer
       
    92         * @return void
       
    93         */
       
    94         IMPORT_C void SetObserver( 
       
    95             MCaeStillDecoderObserver* aObserver );
       
    96 
       
    97         /** 
       
    98         * Creates the CImageItem object, places it in the internal queue and 
       
    99         * starts the memory image conversion where the memory image (e.g. JPEG) 
       
   100         * is converted to bitmap. 
       
   101         * @param aImageBuffer Memory image to convert. Ownership is given.
       
   102         * @param aTargetBitmapMode Target/destination bitmap color mode
       
   103         * @param aTargetBitmapSize Target/destination bitmap size without free scaling decoder
       
   104         * @param aFullyScaledTargetBitmapSize Target/destination bitmap size with free scaling decoder
       
   105         * @return void
       
   106         */
       
   107         IMPORT_C void ConvertHBufC8ToCFbsBitmapL( 
       
   108             HBufC8* aImageBuffer,
       
   109             TDisplayMode aTargetBitmapMode,
       
   110             const TSize& aTargetBitmapSize,
       
   111             const TSize& aFullyScaledTargetBitmapSize = TSize( 0, 0 ) );
       
   112 
       
   113         /**
       
   114         * Destroys all allocations for decoding, as the images from the queue.
       
   115         * @return void
       
   116         */
       
   117         IMPORT_C void Cleanup();
       
   118 
       
   119     protected: // Constructors
       
   120         /**
       
   121         * C++ constructor.
       
   122         */
       
   123         CCaeStillDecoder();
       
   124 
       
   125         /**
       
   126         * Symbian 2nd phase constructor that can leave.
       
   127         */
       
   128         void ConstructL();
       
   129 
       
   130     private: // From CCaeStillConverter:
       
   131         
       
   132         /**
       
   133         * From CActive, implements cancellation of an outstanding request.
       
   134         * @return void
       
   135         */
       
   136         void DoCancel();
       
   137 
       
   138     protected: // From CCaeStillConverter
       
   139         
       
   140         void ConvertL();
       
   141    
       
   142         void ConversionComplete( 
       
   143             TInt aError );
       
   144 
       
   145     private: // Data
       
   146 
       
   147         // Still Decoder observer.
       
   148         MCaeStillDecoderObserver* iObserver;
       
   149 
       
   150         // Pointer to ICL decoder object.
       
   151         CImageDecoder* iDecoder;
       
   152 
       
   153         // Pointer to decoded image.
       
   154         CFbsBitmap* iDecodedImage;
       
   155 
       
   156         // Class wide file server handle for file operations
       
   157         RFs iFs;
       
   158     };
       
   159 
       
   160 
       
   161 #endif // CAESTILLDECODER_H   
       
   162 
       
   163 
       
   164 // End of File