sl@0: // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #ifndef __ASYNCFILEPARSER_H
sl@0: #define __ASYNCFILEPARSER_H
sl@0: 
sl@0: //  INCLUDES
sl@0: #include <e32base.h>
sl@0: #include "mp4atom.h"
sl@0: 
sl@0: // CONSTANTS
sl@0: 
sl@0: // FORWARD DECLARATIONS
sl@0: class RFile64;
sl@0: struct MP4HandleStruct;
sl@0: 
sl@0: // CLASS DECLARATION
sl@0: 
sl@0: /**
sl@0: *  Async file parser
sl@0: */
sl@0: NONSHARABLE_CLASS(CFileAsyncParser) : public CActive
sl@0:     {
sl@0: 	public: // Constructors and destructor
sl@0: 
sl@0:         /**
sl@0:         * Two-phased constructor.
sl@0:         */
sl@0:         static CFileAsyncParser* NewL( MP4HandleStruct* aHandle, RFile64& aFile );
sl@0: 
sl@0:         /**
sl@0:         * Destructor.
sl@0:         */
sl@0:         ~CFileAsyncParser();
sl@0:     
sl@0: 	public: // New functions
sl@0: 
sl@0:         /**
sl@0:         * Reads audio frames from file asynchronously
sl@0:         * @since 3.1
sl@0:         * @return Error code, KErrNone if no errors, otherwise one of the system wide error codes.
sl@0:         */
sl@0:         TInt ReadAudioFrames( mp4_u8 *buffer, mp4_i64 aPosition, mp4_u32 aBytesToRead );
sl@0: 
sl@0:         /**
sl@0:         * Reads video frames from file asynchronously
sl@0:         * @since 3.1
sl@0:         * @return Error code, KErrNone if no errors, otherwise one of the system wide error codes.
sl@0:         */
sl@0:         TInt ReadVideoFrame(  mp4_u8 *buffer, mp4_i64 aPosition, mp4_u32 aBytesToRead );
sl@0: 
sl@0: 	protected: // Functions from base classes
sl@0:         /**
sl@0:         * From CActive Cancels async request.
sl@0:         */
sl@0:         void DoCancel();
sl@0: 
sl@0:         /**
sl@0:         * From CActive Called when async request completes.
sl@0:         */
sl@0: 	    void RunL();
sl@0: 
sl@0: 	private:
sl@0:         /**
sl@0:         * C++ default constructor.
sl@0:         */
sl@0:         CFileAsyncParser();
sl@0: 
sl@0:         /**
sl@0:         * By default Symbian 2nd phase constructor is private.
sl@0:         */
sl@0:         void ConstructL( MP4HandleStruct* aHandle, RFile64& aFile );
sl@0:         
sl@0:         /**
sl@0:         * By default Symbian 2nd phase constructor is private.
sl@0:         */
sl@0:         TInt ReadDataAsync( mp4_u8 *buffer, mp4_i64 aPosition, mp4_u32 aBytesToRead );
sl@0:         
sl@0:         /**
sl@0:         * Return audio frames to observer
sl@0:         */
sl@0: 		void ReturnAudioFrames();
sl@0: 
sl@0:         /**
sl@0:         * Return video frame to observer
sl@0:         */
sl@0:         void ReturnVideoFrame();
sl@0: 
sl@0:         /**
sl@0:         * Calculates audio framecount in buffer
sl@0:         */        
sl@0:         TInt CalculateAudioFrameCount();
sl@0:         
sl@0: 	private:
sl@0: 		// Handle to parsed file structure.
sl@0: 		MP4HandleStruct* iHandle;
sl@0: 		
sl@0: 		// Disk buffer.
sl@0: 		HBufC8* iDiskBuffer;
sl@0: 		// Pointer to iDiskBuffer data
sl@0: 		TPtr8 iDiskBufferPointer;
sl@0: 		// Disk buffer size
sl@0: 		TInt iReadBufferSize;		
sl@0: 		// Position of last read Diskbuffer in file
sl@0: 		TInt64 iCurrentDiskReadPosition;
sl@0: 		// Position of last read inside iDiskBuffer.
sl@0: 		TUint iCurrentBufferReadPosition;
sl@0: 		// Whether on last parse request all data was found on internal buffer.
sl@0: 		TBool iAllDataInMemory;
sl@0: 		
sl@0: 		// Audio parameters to be filled.
sl@0: 		// Size of audio frame returned to client.
sl@0: 		mp4_u32 iAudioSize;
sl@0: 		// Number of audio frames in buffer.
sl@0: 		mp4_u32 iReturnedAudioFrames;
sl@0: 		// Audio frame presentation time in milliseconds from the beginning of the audio sequence.
sl@0: 		mp4_u32 iAudioTimeStamp; 		
sl@0: 		// 	Audio frame presentation time in timescale from the	beginning of the audio sequence
sl@0: 		mp4_u32 iAudioTimeStamp2; 		
sl@0: 	
sl@0: 		// Video parameter to be filled.
sl@0: 		// Size of video frame returned to client.
sl@0: 		mp4_u32 iVideoSize;
sl@0: 		// Whether returned video frame is keyframe or not.
sl@0: 		mp4_bool iVideoKeyFrame;
sl@0: 		// Video frame presentation time in milliseconds from the beginning of the video sequence.
sl@0: 		mp4_u32 iVideoTimeStamp; 		
sl@0: 		// Video frame presentation time in timescale from the	beginning of the video sequence
sl@0: 		mp4_u32 iVideoTimeStamp2; 		
sl@0: 		
sl@0: 		// Read logic variables.
sl@0: 		// Amount of bytes client wants to read
sl@0: 		TInt iBytesToRead;
sl@0: 		// Amount of bytes read.
sl@0: 		TInt64 iBytesRead;
sl@0: 		// Flag whether there is async writing going.
sl@0: 	    TBool iAsyncReadOngoing;
sl@0: 	    // Flag whether current read is audio.
sl@0: 	    TBool iProcessingAudio;
sl@0: 		// Write error code.
sl@0: 	    TInt iError;
sl@0: 
sl@0:         // Parsed file being read.
sl@0:         RFile64* iInputFile;
sl@0: 		// Output buffer being written to
sl@0: 		mp4_u8* iBuffer;
sl@0: };
sl@0: 
sl@0: #endif  //__ASYNCFILEPARSER_H
sl@0: // End of File