author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 13 Oct 2010 14:59:15 +0300 | |
branch | RCL_3 |
changeset 59 | b0e4b01681c5 |
parent 0 | 1bce908db942 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2004-2006 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: Reads RTP payload format containing ILBC data. |
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* |
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*/ |
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#ifndef ILBCPAYLOADFORMATREAD_H |
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#define ILBCPAYLOADFORMATREAD_H |
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// INCLUDES |
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#include <e32base.h> |
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#include <mmf/server/mmfformat.h> |
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#include "rtpheader.h" |
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#include "formatstatemachine.h" |
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#include "mccinternalcodecs.h" |
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// CLASS DECLARATION |
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/** |
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* Depacketizes RTP payload containing ILBC data. |
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* |
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* @lib MMCCIlbcPlFormat.dll |
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* @since Series 60 3.0 |
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*/ |
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class CIlbcPayloadFormatRead : public CPayloadFormatRead, |
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public MAsyncEventHandler, |
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public MPayloadFormatRead |
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{ |
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public: |
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/** |
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* Two-phased constructor. |
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* @param aSource Data source configuration parameters |
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*/ |
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static CIlbcPayloadFormatRead* NewL ( MDataSource* aSource ); |
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/** |
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* Destructor. |
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*/ |
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virtual ~CIlbcPayloadFormatRead(); |
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public: // New functions |
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/** |
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* Configures payload format with format spesific parameters. |
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* Leaves with KErrArgument if parameters are invalid. |
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* |
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* @since Series 60 3.0 |
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* @param aConfigParams Configuration parameters |
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* @return void |
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*/ |
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virtual void ConfigurePayloadFormatL( const TDesC8& aConfigParams ); |
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public: // From CMMFFormatDecode |
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/** |
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* Return number of audio streams for the given media |
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* Raw audio files can only have 1 audio stream |
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* @since Series 60 3.0 |
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* @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo |
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* @return Number of audio streams |
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*/ |
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TUint Streams( TUid aMediaType ) const; |
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/** |
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* Return the frame time interval for the given media |
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* |
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* @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo |
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* |
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* @return Time interval in micro seconds |
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*/ |
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TTimeIntervalMicroSeconds FrameTimeInterval( TMediaId aMediaType ) const; |
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/** *** NOT SUPPORTED *** |
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* Return the clip duration for the given media |
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* |
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* @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo |
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* |
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* @return Clip duration in micro seconds |
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*/ |
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TTimeIntervalMicroSeconds Duration( TMediaId aMediaType ) const; |
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/** |
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* Accessor funtion to return the number of channels |
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* |
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* @param |
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* |
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* @return Number of channels |
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*/ |
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TUint NumChannels(); |
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/** |
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* Accessor funtion to return the sampling rate |
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* |
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* @param |
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* |
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* @return Sampling rate |
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*/ |
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TUint SampleRate(); |
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|
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/** |
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* Set the samplerate to the given value. |
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* |
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* @param aSampleRate |
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* |
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* @return error code KErrNotSupported if invalid samplerate, else |
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* return KErrNone |
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*/ |
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TInt SetSampleRate( TUint aSampleRate ); |
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|
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public: // From MDataSource |
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|
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/** |
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* Return the four CC code for the given media |
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* |
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* @param aMediaId contains the media type KUidMediaTypeAudio or |
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* KUidMediaTypeVideo |
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* |
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* @return FourCC code |
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*/ |
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TFourCC SourceDataTypeCode( TMediaId aMediaId ); |
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|
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/** |
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* Set the source data type to the given four CC code for the given |
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* media |
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* |
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* @param aSourceFourCC fourCC code |
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* @param aMediaId contains the media type KUidMediaTypeAudio |
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* or KUidMediaTypeVideo |
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* |
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* @return error code KErrNotSupported if invalid |
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* media ID, else return KErrNone |
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*/ |
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TInt SetSourceDataTypeCode( TFourCC aSourceFourCC, |
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TMediaId aMediaId ); |
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|
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/** |
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* Create a source buffer for the given media |
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* |
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* @param aMediaId contains the media type KUidMediaTypeAudio or |
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* KUidMediaTypeVideo |
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* @param aReference value of False is returned to caller if source |
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* buffer is created |
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* |
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* @return Pointer to source buffer created |
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*/ |
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CMMFBuffer* CreateSourceBufferL( TMediaId aMediaId, |
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TBool &aReference ); |
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|
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/** |
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* Create a source buffer for the given media, setting frame size |
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* to match the given sink buffer |
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* |
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* @param aMediaId contains the media type KUidMediaTypeAudio or |
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* KUidMediaTypeVideo |
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* @param aSinkBuffer address of sink buffer |
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* @param aReference value of False is returned to caller if source |
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* buffer is created |
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* |
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* @return Pointer to source buffer created |
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*/ |
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CMMFBuffer* CreateSourceBufferL( TMediaId aMediaId, |
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CMMFBuffer& aSinkBuffer, |
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TBool &aReference ); |
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|
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/** |
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* Read the next block of data from file into the given buffer |
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* |
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* @param aBuffer source data buffer for the AMR-NB data read |
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* @param aConsumer data sink pointer |
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* @param aMediaId contains the media type KUidMediaTypeAudio or |
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* KUidMediaTypeVideo |
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* |
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* @return |
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*/ |
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void FillBufferL( CMMFBuffer* aBuffer, |
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MDataSink* aConsumer, |
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TMediaId aMediaId ); |
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|
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/** |
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* Log in to the source thread - this funtion merely passes the |
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* command to its source clip data source object. The source clip |
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* object will handle the thread log on procedures. |
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* |
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* @param aEventHandler address of event handler |
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* |
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* @return error code returned by source clip |
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*/ |
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TInt SourceThreadLogon( MAsyncEventHandler& aEventHandler ); |
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|
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/** |
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* Log out of the source thread - this funtion merely passes the |
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* command to its source clip data source object. The source clip |
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* object will handle the thread log off procedures. |
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* |
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* @param |
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* @return |
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*/ |
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void SourceThreadLogoff(); |
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|
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/** |
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* Negotiate source settings (buffer size) to match |
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* given source object |
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* |
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* @param aDataSink address of sink object |
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* |
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* @return |
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*/ |
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void NegotiateSourceL( MDataSink& aDataSink ); |
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|
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/** |
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* From MDataSource Primes the source. |
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* @since |
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* @param None |
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*/ |
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void SourcePrimeL(); |
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|
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/** |
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* From MDataSource Plays the source. |
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* @since |
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* @param None |
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*/ |
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void SourcePlayL(); |
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|
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/** |
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* From MDataSource Pauses the source. |
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* @since |
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* @param None |
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*/ |
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void SourcePauseL(); |
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|
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/** |
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* From MDataSource Stops the source. |
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* @since |
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* @param None |
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*/ |
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void SourceStopL(); |
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public: // From MDataSink |
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/** |
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* Called after the data buffer is filled. Update the number of bytes |
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* read and the current read position for the next read operation. |
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* |
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* @param aBuffer data buffer filled |
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* |
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* @return |
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*/ |
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virtual void DataBufferFilledL( CMMFBuffer* aBuffer, |
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const TRtpRecvHeader& aRecvHeader ); |
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|
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/** |
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* Gets the data type code for the sink specified by the media ID. |
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* Format decode may act in role of MDataSink. |
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* |
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* @param aMediaId Media ID |
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* @return The data sink type code |
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*/ |
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TFourCC SinkDataTypeCode( TMediaId aMediaId ); |
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|
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public: // From MAsyncEventHandler |
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virtual TInt SendEventToClient(const TMMFEvent& /*aEvent*/) |
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{return KErrNone;} |
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|
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public: // From MPayloadFormatRead |
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|
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/** |
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* Send full sink buffer with iLBC frames to data path. |
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* Sink buffer is decided on one of the two frame buffers |
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* Called by the state machine. |
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* @since Series 60 3.0 |
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* @param None |
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*/ |
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void SendDataToSinkL(); |
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|
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/** |
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* Fill the sink buffer by decoding the RTP payload into iLBC frames |
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* Sink buffer is decided on one of the two frame buffers |
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* Called by the state machine. |
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* @since Series 60 3.0 |
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* @param None |
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*/ |
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void FillSinkBufferL(); |
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|
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/** |
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* Request the RTPSource to fill the source buffer with RTP payload |
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* Source buffer is decided by the RTPSource. |
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* Called by the state machine. |
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* @since Series 60 3.0 |
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* @param None |
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*/ |
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void FillSourceBufferL(); |
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|
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protected: // New functions |
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|
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protected: // Functions from base classes |
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|
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private: // New functions |
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|
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/** |
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* Decode audio frames from RTP payload to the audio frame array. |
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* Next decoded frame may be requested by GetNextFrameL(). |
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* |
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* @since Series 60 3.0 |
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* @param aSourceBuffer RTP payload to be decoded |
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* @return Number of decoded frames |
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*/ |
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TInt DecodePayload( const TDesC8& aSourceBuffer ); |
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|
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/** |
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* Return next decoded audio frame. |
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* @since Series 60 3.0 |
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* @param aToBuffer - [output] Buffer to place decoded frame |
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* @return Boolean indicating whether decoded frames are remaining. |
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*/ |
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TBool GetNextFrame( TDes8& aToBuffer ); |
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328 |
|
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/** |
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* Update payload format with format spesific parameters. |
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* |
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* @since Series 60 3.0 |
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* @param aCodecInfo Codec info |
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* @return void |
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*/ |
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void UpdateConfigurationL( const TMccCodecInfo& aCodecInfo ); |
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337 |
|
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338 |
/** |
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* Configures the formatter based on input parameters. |
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* |
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341 |
* @since Series 60 3.0 |
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* @param aCodecInfo Codec info |
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* @return void |
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*/ |
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void DoConfigurePayloadFormatL( const TMccCodecInfo& aCodecInfo ); |
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346 |
|
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private: |
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348 |
|
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349 |
/** |
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* C++ default constructor. |
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*/ |
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CIlbcPayloadFormatRead (); |
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353 |
|
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354 |
/** |
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* By default Symbian 2nd phase constructor is private. |
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* |
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* @param aConf Decoder Configuration params |
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*/ |
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void ConstructL ( MDataSource* aSource ); |
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360 |
|
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361 |
/** |
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* Creates a buffer used in data transfer between format read and |
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* its datasource. |
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* |
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* @since Series 60 3.2 |
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* @param aSize Suggested buffer size |
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* @param aIsOwnBuffer Indicates ownership of the buffer |
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* @return Created buffer |
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*/ |
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CMMFDataBuffer* CreateClipBufferL( TUint aSize, TBool& aIsOwnBuffer ); |
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371 |
|
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private: // Data |
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373 |
|
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enum TCurrentBuffer |
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375 |
{ |
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EBufferOne = 0, |
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EBufferTwo |
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}; |
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379 |
|
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// the fourCC |
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TFourCC iFourCC; |
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382 |
|
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// Format decoding state machine |
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CFormatDecodeStateMachine* iStateMachine; |
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385 |
|
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// ETrue if decoded frames are remaining |
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TBool iBufferToReadExists; |
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388 |
|
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// Number of frames decoded from received RTP payload |
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TInt iNumOfFrames; |
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// Data sink that requested "FillBuffer". |
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MDataSink* iSink; |
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393 |
|
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// Frame time interval in micro seconds |
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TTimeIntervalMicroSeconds iFrameTimeInterval; |
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396 |
|
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// Buffer to store depacketized Ilbc frames |
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CMMFDataBuffer* iFrameBufferOne; |
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399 |
|
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// Alternative buffer to store depacketized Ilbc frames |
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CMMFDataBuffer* iFrameBufferTwo; |
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402 |
|
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// Flag to indicate which buffer is in use |
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TCurrentBuffer iCurrentBuffer; |
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405 |
|
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// Buffer to hold payload got from data source; |
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CMMFDataBuffer* iSourceBuffer; |
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408 |
|
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// Indicates whether payload read has ownership of source buffer |
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TBool iSourceBufOwnership; |
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411 |
|
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TMediaId iMediaId; |
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413 |
|
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// Flag to indicate that received frame was comfort noise |
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TBool iCnFrame; |
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416 |
|
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// Current index in set of audio frames decoded from last payload |
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418 |
TInt iFrameIndex; |
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419 |
|
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// Contains pointers to audio frames in received payload |
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RArray<TPtr8> iFrameArray; |
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422 |
|
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// RTP Header |
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TRtpRecvHeader iRecvHeader; |
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425 |
|
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// Parameters relating to RTP data encoding |
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TMccCodecInfo iCInfo; |
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428 |
|
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// Friend class for testing |
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#ifdef TEST_EUNIT |
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friend class UT_CIlbcPayloadFormatRead; |
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#endif |
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}; |
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#endif /* ILBCPAYLOADFORMATREAD_H */ |
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// End of File |