author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 08:44:37 +0200 | |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003 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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*/ |
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#ifndef __VEDVIDEOCLIPINFO_H__ |
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#define __VEDVIDEOCLIPINFO_H__ |
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#include "VedCommon.h" |
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#include <gdi.h> |
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#define KFrameIndexBestThumb (-1) // search for best possible thumbnail from video |
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|
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/* |
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* Forward declarations. |
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*/ |
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class CFbsBitmap; |
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class CVedVideoClipInfo; |
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class CVedVideoClipGenerator; |
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|
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/** |
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* Observer for notifying that video clip info |
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* is ready for reading. |
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* |
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* @see CVedVideoClipInfo |
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*/ |
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class MVedVideoClipInfoObserver |
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{ |
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public: |
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/** |
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* Called to notify that video clip info is ready |
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* for reading. |
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* |
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* Possible error codes: |
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* - <code>KErrNotFound</code> if there is no file with the specified name |
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* in the specified directory (but the directory exists) |
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* - <code>KErrPathNotFound</code> if the specified directory |
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* does not exist |
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* - <code>KErrUnknown</code> if the specified file is of unknown format |
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* |
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* @param aInfo video clip info |
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* @param aError <code>KErrNone</code> if info is ready |
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* for reading; one of the system wide |
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* error codes if reading file failed |
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*/ |
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virtual void NotifyVideoClipInfoReady(CVedVideoClipInfo& aInfo, |
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TInt aError) = 0; |
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}; |
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|
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|
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/** |
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* Observer for notifying that video clip frame has been completed. |
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* |
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* @see CVedVideoClipInfo |
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*/ |
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class MVedVideoClipFrameObserver |
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{ |
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public: |
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/** |
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* Called to notify that video clip frame has been completed. |
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* |
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* @param aInfo video clip info |
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* @param aError <code>KErrNone</code> if frame was |
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* completed successfully; one of the system wide |
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* error codes if generating frame failed |
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* @param aFrame pointer to frame if it was completed successfully; |
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* <code>NULL</code> if generating frame failed |
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*/ |
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virtual void NotifyVideoClipFrameCompleted(CVedVideoClipInfo& aInfo, |
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TInt aError, |
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CFbsBitmap* aFrame) = 0; |
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}; |
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|
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/** |
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* Utility class for getting information about video clip files. |
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*/ |
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class CVedVideoClipInfo : public CBase |
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{ |
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public: |
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|
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/* Constructors & destructor. */ |
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|
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/** |
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* Constructs a new CVedVideoClipInfo object to get information |
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* about the specified video clip file. The specified observer |
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* is notified when info is ready for reading. This method |
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* may leave if no resources are available to construct |
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* a new object. |
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* The file will be opened in EFileShareReadersOnly mode by default, |
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* and the same mode should be used by the client too if it need to open |
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* the file at the same time. |
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* |
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* Possible leave codes: |
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* - <code>KErrNoMemory</code> if memory allocation fails |
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* |
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* @param aFileName name of video clip file |
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* @param aObserver observer to notify when info is ready for reading |
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* |
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* @return pointer to a new CVedVideoClipInfo instance |
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*/ |
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IMPORT_C static CVedVideoClipInfo* NewL(const TDesC& aFileName, |
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MVedVideoClipInfoObserver& aObserver); |
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|
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/** |
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* Constructs a new CVedVideoClipInfo object to get information |
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* about the specified video clip file. The constructed object |
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* is left in the cleanup stack. The specified observer |
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* is notified when info is ready for reading. This method |
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* may leave if no resources are available to construct a new |
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* object. |
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* The file will be opened in EFileShareReadersOnly mode by default, |
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* and the same mode should be used by the client too if it need to open |
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* the file at the same time. |
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* |
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* Possible leave codes: |
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* - <code>KErrNoMemory</code> if memory allocation fails |
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* |
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* @param aFileName name of video clip file |
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* @param aObserver observer to notify when info is ready for reading |
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* |
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* @return pointer to a new CVedVideoClipInfo instance |
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*/ |
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IMPORT_C static CVedVideoClipInfo* NewLC(const TDesC& aFileName, |
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MVedVideoClipInfoObserver& aObserver); |
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|
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/* General property methods. */ |
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|
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|
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/** |
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* Returns a descriptive name for the clip. Panics if info is not yet |
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* ready for reading. |
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* |
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* @return descriptive name of the clip |
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*/ |
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virtual TPtrC DescriptiveName() const = 0; |
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|
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/** |
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* Returns the file name of the clip. Panics if there is no file |
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* associated with this clip or info is not yet ready for reading. |
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* |
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* @return file name of the clip |
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*/ |
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virtual TPtrC FileName() const = 0; |
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|
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/** |
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* Returns the generator of the clip. Panics if there is no video clip |
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* generator associated with the clip or info is not yet ready for reading. |
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* |
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* @return generator of the clip |
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*/ |
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virtual CVedVideoClipGenerator* Generator() const = 0; |
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|
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/** |
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* Returns the class of the clip. |
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* |
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* @return class of the clip |
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*/ |
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virtual TVedVideoClipClass Class() const = 0; |
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|
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/** |
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* Returns the video format of the clip. Panics if there is no file |
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* associated with this clip or info is not yet ready for reading. |
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* |
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* @return video format of the clip |
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*/ |
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virtual TVedVideoFormat Format() const = 0; |
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|
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/** |
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* Returns the video type of the clip. Panics if there is no file |
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* associated with this clip or info is not yet ready for reading. |
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* |
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* @return video type of the clip |
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*/ |
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virtual TVedVideoType VideoType() const = 0; |
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|
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/** |
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* Returns the resolution of the clip. Panics if info |
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* is not yet ready for reading. |
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* |
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* @return resolution of the clip |
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*/ |
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virtual TSize Resolution() const = 0; |
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|
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/** |
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* Returns whether this video clip has an audio track or not. |
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* Panics if info is not yet ready for reading. |
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* |
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* @return <code>ETrue</code> if clip has an audio track; |
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* <code>EFalse</code> otherwise |
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*/ |
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virtual TBool HasAudio() const = 0; |
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|
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/** |
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* Returns the audio type of the clip audio track. Panics if there is no file |
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* associated with this clip or info is not yet ready for reading. |
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* |
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* @return audio type of the clip audio track |
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*/ |
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virtual TVedAudioType AudioType() const = 0; |
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/** |
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* Returns the channel mode of the audio if applicable. |
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* |
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* @return channel mode |
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*/ |
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virtual TVedAudioChannelMode AudioChannelMode() const = 0; |
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/** |
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* Returns the sampling rate in kilohertz. |
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* |
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* @return sampling rate |
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*/ |
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virtual TInt AudioSamplingRate() const = 0; |
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/** |
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* Returns the duration of the clip in microseconds. Panics if info |
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* is not yet ready for reading. |
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* |
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* @return duration of the clip |
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*/ |
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virtual TTimeIntervalMicroSeconds Duration() const = 0; |
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/* Video frame property methods. */ |
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/** |
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* Returns the number of video frames in this clip. Panics if info |
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* is not yet ready for reading. |
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* |
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* @return number of video frames in this clip |
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*/ |
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virtual TInt VideoFrameCount() const = 0; |
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|
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/** |
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* Returns the start time of the video frame at the specified index. |
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* Panics if info is not yet ready for reading or the index is illegal. |
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* |
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* @param aIndex index |
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* |
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* @return start time of the video frame at the specified index in microseconds |
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*/ |
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virtual TTimeIntervalMicroSeconds VideoFrameStartTimeL(TInt aIndex) = 0; |
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|
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/** |
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* Returns the end time of the video frame at the specified index. |
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* Panics if info is not yet ready for reading or the index is illegal. |
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* |
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* @param aIndex index |
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* |
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* @return end time of the video frame at the specified index in microseconds |
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*/ |
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virtual TTimeIntervalMicroSeconds VideoFrameEndTimeL(TInt aIndex) = 0; |
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|
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/** |
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* Returns the duration of the video frame at the specified index. |
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* Panics if info is not yet ready for reading or the index is illegal. |
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* |
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* @param aIndex index |
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* |
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* @return duration of the video frame at the specified index in microseconds |
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*/ |
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virtual TTimeIntervalMicroSeconds VideoFrameDurationL(TInt aIndex) = 0; |
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|
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/** |
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* Returns the size of the video frame at the specified index. |
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* Panics if there is no file associated with this clip, or info is not |
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* yet ready for reading, or the index is illegal. |
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* |
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* @param aIndex index |
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* |
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* @return size of the video frame at the specified index in bytes |
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*/ |
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virtual TInt VideoFrameSizeL(TInt aIndex) = 0; |
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|
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/** |
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* Returns whether the video frame at the specified index is an intra |
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* frame or not. Panics if info is not yet ready for reading or |
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* the index is illegal. |
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* |
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* @param aIndex index |
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* |
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* @return <code>ETrue</code>, if the video frame at the specified index is an |
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* intra frame; <code>EFalse</code>, otherwise |
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*/ |
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virtual TBool VideoFrameIsIntraL(TInt aIndex) = 0; |
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|
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/** |
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* Returns the video frame index at the specified time. Panics if info is not yet |
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* ready for reading or the time is illegal. |
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* |
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* @param aTime time |
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* |
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* @return video frame index at the specified time |
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*/ |
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virtual TInt GetVideoFrameIndexL(TTimeIntervalMicroSeconds aTime) = 0; |
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|
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/* Frame methods. */ |
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/** |
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* Generates a bitmap of the given frame from video clip. |
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* The frame bitmap is scaled to the specified resolution and converted |
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* to the specified display mode. This method is asynchronous. The frame |
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* is generated in background and the observer is notified when the frame |
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* is complete. This method panics if info is not yet ready for reading or |
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* the resolution is illegal. |
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* |
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* Possible leave codes: |
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* - <code>KErrNoMemory</code> if memory allocation fails |
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* - <code>KErrNotSupported</code>, if the specified combination of |
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* parameters is not supported |
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* |
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* @param aObserver observer to be notified when the frame is completed |
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* @param aIndex index of frame, or KFrameIndexBestThumb to look for |
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* most suitable thumbnail frame. |
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* @param aResolution resolution of the desired frame bitmap, or |
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* <code>NULL</code> if the frame should be |
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* in the original resolution |
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* @param aDisplayMode desired display mode; or <code>ENone</code> if |
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* any display mode is acceptable |
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* @param aEnhance apply image enhancement algorithms to improve |
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* frame quality; note that this may considerably |
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* increase the processing time needed to prepare |
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* the frame |
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* @param aPriority priority of the frame generation |
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*/ |
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virtual void GetFrameL(MVedVideoClipFrameObserver& aObserver, |
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TInt aIndex = KFrameIndexBestThumb, |
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TSize* const aResolution = 0, |
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TDisplayMode aDisplayMode = ENone, |
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TBool aEnhance = EFalse, |
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TInt aPriority = CActive::EPriorityIdle) = 0; |
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/** |
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* Cancels frame generation. If no frame is currently being |
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* generated, the function does nothing. |
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*/ |
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virtual void CancelFrame() = 0; |
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|
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/** |
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* Sets the transcode factor. |
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* |
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* @param aFactor transcode factor |
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*/ |
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virtual void SetTranscodeFactor(TVedTranscodeFactor aFactor) = 0; |
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/** |
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* Returns the transcode factor. |
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* |
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* @return transcode factor. |
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*/ |
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virtual TVedTranscodeFactor TranscodeFactor() = 0; |
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/** |
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* Returns whether video clip is MMSCompatible. |
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* |
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* @return ETrue if compatible with MMS |
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*/ |
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virtual TBool IsMMSCompatible() = 0; |
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}; |
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#endif // __VEDVIDEOCLIPINFO_H__ |
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