/*
* Copyright (c) 2004-2008 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: Reads RTP payload format containing G711 data.
*
*/
#ifndef G711PAYLOADFORMATREAD_H
#define G711PAYLOADFORMATREAD_H
// INCLUDES
#include <e32base.h>
#include "rtpheader.h"
#include "formatstatemachine.h"
#include "mccinternalcodecs.h"
// CLASS DECLARATION
/**
* Depacketizes RTP payload containing G711 data.
*
* @lib Mccg711plformat.dll
* @since Series 60 3.0
*/
class CG711PayloadFormatRead : public CPayloadFormatRead, public MPayloadFormatRead
{
public:
/**
* Two-phased constructor.
*/
static CG711PayloadFormatRead* NewL( MDataSource* aSource );
/**
* Destructor.
*/
virtual ~CG711PayloadFormatRead();
public: // New functions
/**
* Configures payload format with format spesific parameters.
* Leaves with KErrArgument if parameters are invalid.
*
* @since Series 60 3.0
* @param aConfigParams Configuration parameters
* @return void
*/
virtual void ConfigurePayloadFormatL( const TDesC8& aConfigParams );
public: // From CMMFFormatDecode
/**
* From CMMFFormatDecode. Gets the number of streams of the specified
* media type.
* @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo
* @return Number of audio streams
*/
TUint Streams( TUid aMediaType ) const;
/**
* From CMMFFormatDecode. Returns the time interval for one frame for
* the specified media type.
*
* @param aMediaType
* The media type id
*
* @return The frame time interval
*/
TTimeIntervalMicroSeconds FrameTimeInterval( TMediaId aMediaType ) const;
/** *** NOT SUPPORTED ***
* Return the clip duration for the given media
*
* @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo
*
* @return Clip duration in micro seconds
*/
TTimeIntervalMicroSeconds Duration( TMediaId aMediaType ) const;
/**
* Accessor funtion to return the number of channels
*
* @param
*
* @return Number of channels
*/
TUint NumChannels();
/**
* Accessor funtion to return the sampling rate
*
* @param
*
* @return Sampling rate
*/
TUint SampleRate();
/**
* Set the samplerate to the given value.
*
* @param aSampleRate
*
* @return error code KErrNotSupported if invalid samplerate, else
* return KErrNone
*/
TInt SetSampleRate( TUint aSampleRate );
public: // From MDataSource
/**
* Return the four CC code for the given media
*
* @param aMediaId contains the media type KUidMediaTypeAudio or
* KUidMediaTypeVideo
*
* @return FourCC code
*/
TFourCC SourceDataTypeCode( TMediaId aMediaId );
/**
* Set the source data type to the given four CC code for the given
* media
*
* @param aSourceFourCC fourCC code
* @param aMediaId contains the media type KUidMediaTypeAudio
* or KUidMediaTypeVideo
*
* @return error code KErrNotSupported if invalid
* media ID, else return KErrNone
*/
TInt SetSourceDataTypeCode( TFourCC aSourceFourCC,
TMediaId aMediaId );
/**
* Create a source buffer for the given media
*
* @param aMediaId contains the media type KUidMediaTypeAudio or
* KUidMediaTypeVideo
* @param aReference value of False is returned to caller if source
* buffer is created
*
* @return Pointer to source buffer created
*/
CMMFBuffer* CreateSourceBufferL( TMediaId aMediaId,
TBool &aReference );
/**
* Create a source buffer for the given media, setting frame size
* to match the given sink buffer
*
* @param aMediaId contains the media type KUidMediaTypeAudio or
* KUidMediaTypeVideo
* @param aSinkBuffer address of sink buffer
* @param aReference value of False is returned to caller if source
* buffer is created
*
* @return Pointer to source buffer created
*/
CMMFBuffer* CreateSourceBufferL( TMediaId aMediaId,
CMMFBuffer& aSinkBuffer,
TBool &aReference );
/**
* Read the next block of data from file into the given buffer
*
* @param aBuffer source data buffer for the AMR-NB data read
* @param aConsumer data sink pointer
* @param aMediaId contains the media type KUidMediaTypeAudio or
* KUidMediaTypeVideo
*
* @return
*/
void FillBufferL( CMMFBuffer* aBuffer,
MDataSink* aConsumer,
TMediaId aMediaId );
/**
* Log in to the source thread - this funtion merely passes the
* command to its source clip data source object. The source clip
* object will handle the thread log on procedures.
*
* @param aEventHandler address of event handler
*
* @return error code returned by source clip
*/
TInt SourceThreadLogon( MAsyncEventHandler& aEventHandler );
/**
* Log out of the source thread - this funtion merely passes the
* command to its source clip data source object. The source clip
* object will handle the thread log off procedures.
*
* @param
* @return
*/
void SourceThreadLogoff();
/**
* Negotiate source settings (buffer size) to match
* given source object
*
* @param aDataSink address of sink object
*
* @return
*/
void NegotiateSourceL( MDataSink& aDataSink );
/**
* From MDataSource Primes the source.
* @since
* @param None
*/
void SourcePrimeL();
/**
* From MDataSource Plays the source.
* @since
* @param None
*/
void SourcePlayL();
/**
* From MDataSource Pauses the source.
* @since
* @param None
*/
void SourcePauseL();
/**
* From MDataSource Stops the source.
* @since
* @param None
*/
void SourceStopL();
public: // From MDataSink
/**
* Called after the data buffer is filled. Update the number of bytes
* read and the current read position for the next read operation.
*
* @param aBuffer data buffer filled
*
* @return
*/
virtual void DataBufferFilledL( CMMFBuffer* aBuffer,
const TRtpRecvHeader& aRecvHeader );
/**
* Gets the data type code for the sink specified by the media ID.
* Format decode may act in role of MDataSink.
*
* @param aMediaId Media ID
* @return The data sink type code
*/
TFourCC SinkDataTypeCode( TMediaId aMediaId );
public: // From MPayloadFormatRead
/**
* Send full sink buffer with G.711 frames to data path.
* Sink buffer is decided on one of the two frame buffers
* Called by the state machine.
* @since Series 60 3.0
* @param None
*/
void SendDataToSinkL();
/**
* Fill the sink buffer by decoding the RTP payload into G.711 frames
* Sink buffer is decided on one of the two frame buffers
* Called by the state machine.
* @since Series 60 3.0
* @param None
*/
void FillSinkBufferL();
/**
* Request the RTPSource to fill the source buffer with RTP payload
* Source buffer is decided by the RTPSource.
* Called by the state machine.
* @since Series 60 3.0
* @param None
*/
void FillSourceBufferL();
private:
/**
* C++ default constructor.
*/
CG711PayloadFormatRead();
/**
* By default Symbian 2nd phase constructor is private.
*
* @param aConf Decoder Configuration params
*/
void ConstructL( MDataSource* aSource );
/**
* Decode audio frames from RTP payload to the audio frame array.
* Next decoded frame may be requested by GetNextFrameL().
*
* @since Series 60 3.0
* @param aSourceBuffer RTP payload to be decoded
* @return Number of decoded frames
*/
TInt DecodePayload( TDes8& aSourceBuffer );
/**
* Return next decoded audio frame.
* @since Series 60 3.0
* @param aToBuffer - [output] Buffer to place decoded frame
* @return Boolean indicating whether decoded frames are remaining.
*/
TBool GetNextFrame( TDes8& aToBuffer );
/**
* Update payload format with format spesific parameters.
* Leaves with KErrArgument if parameters are invalid.
*
* @since Series 60 3.0
* @param aCodecInfo Configuration parameters
* @return void
*/
void UpdateConfigurationL( TMccCodecInfo& aCodecInfo );
/**
* Creates a buffer used in data transfer between format read and
* its datasource.
*
* @since Series 60 3.2
* @param aSize Suggested buffer size
* @param aIsOwnBuffer Indicates ownership of the buffer
* @return Created buffer
*/
CMMFDataBuffer* CreateClipBufferL( TUint aSize, TBool& aIsOwnBuffer );
private: // Data
enum TCurrentBuffer
{
EBufferOne = 0,
EBufferTwo
};
// the fourCC
TFourCC iFourCC;
// Format decoding state machine
CFormatDecodeStateMachine* iStateMachine;
// ETrue if decoded frames are remaining
TBool iBufferToReadExists;
// Number of frames expected to receive in RTP payload
TUint8 iFramesPerPacket;
// Frame time interval in micro seconds
TTimeIntervalMicroSeconds iFrameTimeInterval;
// Buffer to store depacketized G711 frames
CMMFDataBuffer* iFrameBufferOne;
// Alternate buffer to store depacketized G711 frames
CMMFDataBuffer* iFrameBufferTwo;
// Flag to indicate which buffer is in use
TCurrentBuffer iCurrentBuffer;
// Buffer to hold payload got from data source;
CMMFDataBuffer* iSourceBuffer;
// Indicates whether payload read has ownership of source buffer
TBool iSourceBufOwnership;
// Flag to indicate that received frame was comfort noise
TBool iCnFrame;
// Current index in set of audio frames decoded from last payload
TInt iFrameIndex;
// Contains pointers to audio frames in received payload
RArray<TPtr8> iFrameArray;
// RTP Header
TRtpRecvHeader iRecvHeader;
// Parameters relating to RTP data encoding
TMccCodecInfo iCInfo;
#ifdef TEST_EUNIT
// For EUnit test cases
friend class UT_CG711PayloadFormatRead;
#endif
};
#endif /* G711PAYLOADFORMATREAD_H */
// End of File