author | vnuitven <> |
Mon, 06 Sep 2010 18:50:40 +0530 | |
branch | rcs |
changeset 50 | 1d8943dd8be6 |
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: Class definition for the AMR/RTP payload format plugin |
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* |
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*/ |
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#ifndef AMRPAYLOADFORMATREAD_H |
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#define AMRPAYLOADFORMATREAD_H |
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// INCLUDES |
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#include <e32base.h> |
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#include <e32std.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 "amrpayloadformatter.h" |
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#include "streamformatter.h" |
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#include "mccinternalcodecs.h" |
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#include "mccinternalevents.h" |
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#ifdef FTD_ENABLED |
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#include <e32msgqueue.h> |
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#include "MccJBufferStats.h" |
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#endif |
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// FORWARD DECLARATIONS |
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class CAmrPayloadEncoder; |
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class CAmrPayloadDecoder; |
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// CLASS DECLARATION |
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/** |
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* The CAmrPayloadFormatRead class implements the MMF format plugin for decoding |
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* of RTP payloadformat for AMR codec. Refer to IETF RFC3267. |
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* This class receives AMR payload data from an RTP packet and converts it into |
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* one or more AMR frames. |
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* |
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* @lib MMccamrplformat.dll |
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* @since Series 60 3.0 |
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*/ |
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class CAmrPayloadFormatRead : public CPayloadFormatRead, public MPayloadFormatRead |
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{ |
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public: // Constructors and destructor |
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/** |
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* Two-phased constructor. |
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* @param aSource Source of the data for the payload format plugin |
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*/ |
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static CAmrPayloadFormatRead* NewL ( MDataSource* aSource ); |
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/** |
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* Destructor. |
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*/ |
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virtual ~CAmrPayloadFormatRead ( ); |
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public: // New functions |
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/** |
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* Cancel any requests from DataPath and Stop state machine also |
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* @since Series-60 2.1 |
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* @return None |
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*/ |
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virtual void CancelDlRequest( ); |
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/** |
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* Send full sink buffer with AMR 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 2.1 |
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* @return None |
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*/ |
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void SendDataToSinkL( ); |
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/* |
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* Fill the sink buffer by decoding the RTP payload into AMR 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 2.1 |
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* @return None |
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*/ |
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void FillSinkBufferL( ); |
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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 2.1 |
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* @return None |
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*/ |
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void FillSourceBufferL( ); |
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public: // From CMMFFormatDecode |
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/** |
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* From CMMFFormatDecode. Return number of audio streams for the given |
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* media Raw audio files can only have 1 audio stream. |
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* |
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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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* @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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* |
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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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* Set the packetizationrate to the given value. |
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* |
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* @param aPacketizationRate - [input] Number of AMR frame blocks per RTP packet |
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* |
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* @return error code KErrNotSupported if invalid packetizationrate, else return KErrNone |
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*/ |
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TInt SetSampleRate( TUint aSampleRate ); |
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/** |
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* From CMMFFormatDecode |
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*/ |
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TFourCC SinkDataTypeCode( TMediaId aMediaId ); |
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public: // From MDataSource. CAmrPayloadFormatRead is data source to the data path and AMR codec. |
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|
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/** |
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* From MDataSource. Read the next block of data from file into the |
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* 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 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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* From MDataSource. Primes the source. |
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* @since Series 60 3.0 |
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* @return None |
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*/ |
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void SourcePrimeL( ); |
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/** |
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* From MDataSource. Plays the source. |
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* @since Series 60 3.0 |
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* @return None |
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*/ |
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void SourcePlayL( ); |
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/** |
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* From MDataSource. Pauses the source. |
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* @since Series 60 3.0 |
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* @return None |
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*/ |
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void SourcePauseL( ); |
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/** |
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* From MDataSource. Stops the source. |
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* @since Series 60 3.0 |
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* @return None |
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*/ |
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void SourceStopL( ); |
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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 KUidMediaTypeVideo |
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* @param aReference value of False is returned to caller if source 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 to match |
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* the given sink buffer |
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* |
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* @param aMediaId contains the media type KUidMediaTypeAudio or 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 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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* 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 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 media |
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* |
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* @param aSourceFourCC fourCC code |
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* @param aMediaId contains the media type KUidMediaTypeAudio or KUidMediaTypeVideo |
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* |
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* @return error code KErrNotSupported if invalid 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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* Log in to the source thread - this funtion merely passes the command to |
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* its source clip data source object. The source clip object will handle |
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* 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 command to |
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* its source clip data source object. The source clip object will handle |
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* the thread log off procedures. |
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* |
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* @return None |
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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 None |
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*/ |
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void NegotiateSourceL( MDataSink& aDataSink ); |
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|
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|
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public: // From MDataSink. CAmrPayloadFormatRead is data sink to the RTP data source. |
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|
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/** |
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* Called after the data buffer is filled. Update the number of bytes read |
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* 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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* @param aHeaderInfo RTP packet header information |
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* @return None |
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*/ |
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virtual void DataBufferFilledL( CMMFBuffer* aBuffer, |
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const TRtpRecvHeader& aHeaderInfo ); |
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|
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public: |
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|
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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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|
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/** |
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* Update 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 aCodecInfo Configuration parameters |
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* @return void |
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*/ |
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virtual void UpdateConfigurationL( const TMccCodecInfo& aCodecInfo ); |
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private: |
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/** |
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* C++ default constructor. |
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*/ |
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CAmrPayloadFormatRead( ); |
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324 |
|
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/** |
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* By default Symbian 2nd phase constructor is private. |
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* |
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* @param aSource Source of the data for the payload format plugin |
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*/ |
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void ConstructL( MDataSource* aSource ); |
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331 |
|
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/** |
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* Reads data starting from the given position into the source buffer |
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* |
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* @param aBuffer RTP payload buffer |
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* |
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* @return TBool indication of finish decoding RTP payload |
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*/ |
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TBool DoRead( CMMFBuffer* aBuffer ); |
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|
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341 |
/** |
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* Send Amr event to the client . |
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* |
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* @param aEventType |
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*/ |
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void SendAmrEventToClient( TMccInternalEventType aEventType ); |
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347 |
|
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/** |
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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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358 |
|
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/** |
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* Gives corresponding bitrate for mode request |
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* @param aModeRequest |
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* @return bitrate |
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*/ |
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TInt ConvertModeToBitrate( TAmrModeRequest aModeRequest ); |
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365 |
|
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private: // data |
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367 |
|
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// True if this AMR narrow band read, False if wideband |
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TBool iIsNb; |
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370 |
|
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371 |
// Data source providing RTP data |
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MDataSource* iRtpDataSource; |
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373 |
|
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// The fourCC for AMR-NB |
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TFourCC iFourCC; |
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376 |
|
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// Flag used to determine which buffer is currently used as a sink buffer |
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enum TCurrentBuffer |
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379 |
{ |
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EBufferOne = 0, |
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EBufferTwo |
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}; |
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383 |
|
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// Sampling rate from clip header |
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TInt iSamplingRate; |
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386 |
|
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// Number of channels from clip header |
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TUint iChannels; |
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389 |
|
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// Mode from clip header |
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TInt iMode; |
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392 |
|
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// Payload decoder |
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CAmrPayloadDecoder* iPayloadDecoder; |
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395 |
|
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TMediaId iMediaId; |
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397 |
|
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398 |
// Data buffer passed from RtpSource |
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399 |
CMMFBuffer* iBufferToRead; |
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400 |
|
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// Indicates are there frames not decoded remaining |
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TBool iBufferToReadExists; |
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403 |
|
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404 |
// Number of frames decoded from RTP packet |
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TInt iNumOfFrames; |
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406 |
|
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// Frame index indicating are all frames decoded passed to datapath |
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TInt iCurrentFrame; |
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409 |
|
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// Maximum number of frames expected to receive in one RTP packet |
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TInt iFramesPerPacket; |
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412 |
|
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// AMR mode request, used to construct RTP AMR payload header |
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TAmrModeRequest iCmr; |
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415 |
|
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// Format decoding state machine |
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CFormatDecodeStateMachine* iStateMachine; |
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418 |
|
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// Buffer to store depacketized AMR frames |
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CMMFDataBuffer* iFrameBufferOne; |
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421 |
|
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// Alternate buffer to store depacketized AMR frames |
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CMMFDataBuffer* iFrameBufferTwo; |
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424 |
|
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// Flag to indicate which buffer is in use |
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426 |
TCurrentBuffer iCurrentBuffer; |
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427 |
|
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// Buffer to hold payload got from data source |
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CMMFDataBuffer* iSourceBuffer; |
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430 |
|
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// Indicates whether payload read has ownership of source buffer |
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TBool iSourceBufOwnership; |
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|
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// Flag to indicate the outstanding request from data path |
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TBool iFillRequested; |
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436 |
|
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// Encoder |
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TStreamEncoder iStreamEncoder; |
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439 |
|
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// RTP Header |
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TRtpRecvHeader iRecvHeader; |
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442 |
|
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// Parameters relating to RTP data decoding |
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TMccCodecInfo iCInfo; |
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|
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// MMF AsyncEventHandler |
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MAsyncEventHandler* iEventHandler; |
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|
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#ifdef FTD_ENABLED |
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// Message queue carrying jitter buffer statistics |
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RMsgQueue<TMccJBufferStats> iJBufStatsQueue; |
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452 |
|
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// For RTP packet loss detection |
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TUint32 iLatestSeqNum; |
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|
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// Number of frames decoded after starting |
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TUint32 iTotalFrames; |
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|
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// Number of frames lost due to packet loss |
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TUint32 iLostFrames; |
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#endif |
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462 |
|
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private: // Friend classes |
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|
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#ifdef TEST_EUNIT |
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friend class UT_CAmrPayloadFormatRead; |
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#endif |
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|
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}; |
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|
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#endif //AMRPAYLOADFORMATREAD_H |