author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:43:02 +0300 | |
branch | RCL_3 |
changeset 45 | 095bea5f582e |
parent 0 | 71ca22bcf22a |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002 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: Definition of an abstract base class for file format parsers |
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* |
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*/ |
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#ifndef __PARSER_H__ |
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#define __PARSER_H__ |
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// INCLUDES |
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#ifndef __E32BASE_H__ |
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#include <e32base.h> |
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#endif |
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// CONSTANTS |
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// MACROS |
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// DATA TYPES |
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// FUNCTION PROTOTYPES |
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// FORWARD DECLARATIONS |
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// CLASS DECLARATION |
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/** |
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* Base class for file format parser |
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* ?other_description_lines |
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*/ |
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class CParser : public CBase |
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{ |
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public: // Constants |
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enum TErrorCode |
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{ |
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EInternalAssertionFailure = -2200, |
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EParserNotEnoughData = -2201, |
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EParserEndOfStream = -2202, |
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EParserBufferTooSmall = -2203, |
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EParserUnsupportedFormat = -2204, |
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EParserStreamCorrupted = -2205, |
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EParserFailure = -2206 |
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}; |
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// file format |
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enum TFileFormat { |
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EFileFormatUnrecognized = 0, |
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EFileFormat3GP, |
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EFileFormatMP4 |
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}; |
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// video format |
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enum TVideoFormat { |
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EVideoFormatNone = 0, |
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EVideoFormatH263Profile0Level10, |
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EVideoFormatH263Profile0Level45, |
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EVideoFormatMPEG4, |
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EVideoFormatAVCProfileBaseline, |
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EVideoFormatAVCProfileMain, |
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EVideoFormatAVCProfileExtended |
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}; |
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#ifdef __VIDEOEDIT__ |
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enum TProcessingMode |
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{ |
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EParseOnly = 1, |
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EParseAndDecode, |
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EDecodeOnly |
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}; |
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#endif |
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public: // Data structures |
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// common stream parameters |
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struct TStreamParameters |
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{ |
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TBool iHaveVideo; // is there video in the stream ? |
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TFileFormat iFileFormat; // file format |
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TVideoFormat iVideoFormat; // video format |
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TUint iVideoWidth; // width of a video frame |
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TUint iVideoHeight; // height of a video frame |
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TInt64 iVideoPicturePeriodNsec; // one PCF tick period in nanoseconds |
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TUint iVideoIntraFrequency; // intra frame frequency in stream |
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TUint iStreamLength; // stream length in milliseconds |
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TUint iVideoLength; |
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TBool iCanSeek; // TRUE if seeking in file is possible |
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TUint iStreamSize; // stream size in bytes |
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TUint iStreamBitrate; // stream average bitrate |
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TUint iMaxPacketSize; // The maximum media packet size |
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TUint iLogicalChannelNumberVideo; // Logical channel number for video data |
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TUint iReferencePicturesNeeded; // Number of reference pictures |
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// the video decoder needs to store. |
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TUint iNumScalabilityLayers; // The number of different scalability layers used |
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TReal iFrameRate; |
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TUint iVideoTimeScale; |
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}; |
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public: // New functions |
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/** |
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* Parses the stream header. |
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* @param aStreamParameters Stream parameters |
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*/ |
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virtual TInt ParseHeaderL(TStreamParameters& aStreamParameters) = 0; |
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/** |
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* Resets the parser to initial state. |
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* => If input stream is in a file, rewinds it. |
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* => If input is written to parser, all buffered bytes are flushed |
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* @param aStreamParameters Stream parameters |
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*/ |
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virtual TInt Reset() = 0; |
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/** |
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* Gets the number of frames in the current clip |
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* |
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* @return Number of frames |
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*/ |
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inline TInt GetNumberOfFramesInClip() { return iNumberOfFrames; } |
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virtual TInt GetNumberOfVideoFrames() = 0; |
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// virtual TInt GetNumberOfFrames() = 0; |
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/** |
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* Seeks to intra frame before given time |
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* |
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* @param aStartTime Time in microseconds to seek |
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* @param aIndex Index of the frame at aStartTime, if known. 0 otherwise |
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* |
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* @return Number of frames |
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*/ |
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virtual TInt SeekOptimalIntraFrame(TTimeIntervalMicroSeconds aStartTime, TInt aIndex) = 0; |
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/** |
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* Gets the size of video frame at given index |
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* |
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* @param aIndex Index of the frame |
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* |
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* @return Size of frame in bytes |
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*/ |
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virtual TInt GetVideoFrameSize(TInt aIndex) = 0; |
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/** |
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* Gets the timestamp of video frame at given index |
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* |
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* @param aIndex Index of the frame |
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* @param aTimeStamp Output: timestamp in ticks |
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* |
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* @return Timestamp in milliseconds |
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*/ |
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virtual TInt GetVideoFrameStartTime(TInt aIndex, TInt* aTimeStampInTicks) = 0; |
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/** |
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* Gets the type of video frame at given index |
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* |
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* @param aIndex Index of the frame |
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* |
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* @return Frame type: 1 = INTRA, 0 = INTER |
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*/ |
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virtual TInt8 GetVideoFrameType(TInt aIndex) = 0; |
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/** |
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* Gets the start frame index of the current clip |
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* |
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* @return Frame index |
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*/ |
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inline TInt GetStartFrameIndex() { return iStartFrameIndex; } |
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public: // Data |
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// stream parameters |
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TStreamParameters iStreamParameters; |
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// ETrue if parsing this clip for the first time |
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TBool iFirstTimeClipParsing; |
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// number of frames in output clip |
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TInt iOutputNumberOfFrames; |
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|
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protected: // Data |
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|
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// current frame number |
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TInt iFrameNumber; |
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// number of frames in current clip |
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TInt iNumberOfFrames; |
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// index of the first included frame |
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TInt iStartFrameIndex; |
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}; |
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#endif // __PARSER_H__ |
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// End of File |