author | hgs |
Fri, 03 Sep 2010 10:32:33 +0300 | |
changeset 35 | 35844111a233 |
parent 0 | 9b3e960ffc8a |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2004 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: Header file for audio codec data class which is specific to each codec type |
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* |
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*/ |
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#ifndef CCMRAUDIOCODECDATA_H |
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#define CCMRAUDIOCODECDATA_H |
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// INCLUDES |
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#include <CCMRMediaSink.h> |
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#include <e32base.h> |
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#include <mmf/common/mmffourcc.h> |
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/** |
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* Audio codec type (SW/HW) |
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*/ |
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enum TCMRCodecType |
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{ |
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ECodecTypeSW, |
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ECodecTypeHW, |
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ECodecTypeNA |
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}; |
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// FORWARD DECLARATIONS |
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class MDataSource; |
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// CLASS DECLARATION |
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/** |
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* Base class for audio codec data |
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* |
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* @lib |
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* @since 2.6 |
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*/ |
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class CCMRAudioCodecData : public CBase |
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{ |
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public: // Constructors and destructor |
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/** |
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* C++ default constructor. |
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*/ |
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inline CCMRAudioCodecData(TFourCC aFourCC, TInt aBitRate, CCMRMediaBuffer::TBufferType aBufferType, TCMRCodecType aType) |
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: iFourCC(aFourCC), iBitRate(aBitRate), iSampleRate( 8000 ), iChannels( 1 ), |
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iBufferType(aBufferType), iConfigData(NULL), iCodecSWHWType(aType) {}; |
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/** |
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* Destructor. |
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*/ |
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virtual ~CCMRAudioCodecData(); |
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public: // New functions |
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/** |
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* Check if the codec is supported in this configuration |
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* @return TBool ETrue if supported |
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*/ |
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virtual TBool Supported() = 0; |
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/** |
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* Set channel mode for the codec, leaves by default. |
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*/ |
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virtual inline void SetChannelModeL(TUint /*aChannelMode*/) { User::Leave(KErrNotSupported); }; |
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/** |
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* Return the number of channels supported |
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* @return TUint number of channels (1/2) |
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*/ |
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virtual inline TUint GetNumChannels() const { return iChannels; }; |
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/** |
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* Set sample rate for the codec, leaves by default, but can be overridden, then leaves if not supported |
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*/ |
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virtual inline void SetSampleRateL(TUint /*aSampleRate*/) { User::Leave(KErrNotSupported); }; |
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/** |
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* Return the supported sample rate for the codec |
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* @return TUint sample rate (Hz) |
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*/ |
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virtual inline TUint GetSampleRate() const { return iSampleRate; }; |
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/** |
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* Get codec's type/location: SW for CMMFCodecs and HW for HW Devices |
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* @return ECodecTypeSW/ECodecTypeHW/ECodecTypeNA |
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*/ |
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inline TCMRCodecType GetCodecSWHWTypeL() { return iCodecSWHWType; }; |
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/** |
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* Return frame duration in microseconds |
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* @return TReal duration in microseconds |
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*/ |
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virtual inline TReal GetFrameDurationUs() const { return 20000; }; |
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/** |
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* Return preferred duration of PCM capture in microseconds, relevant only for CMMFCodecs |
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* @return TReal duration in milliseconds |
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*/ |
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virtual TReal GetPCMCaptureDurationMs() const = 0; |
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/** |
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* Set bitrate for the codec |
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* @param aBitRate in bps |
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* @return void |
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*/ |
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virtual void SetBitRateL(TInt aBitRate) = 0; |
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/** |
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* Get the current bitrate |
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* @return TInt bitrate in bps |
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*/ |
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virtual TInt GetBitRateL() const = 0; |
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/** |
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* Get the configuration parameters for the codec |
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* @param aDataSource MMF audio input |
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* @return TDes8* configuration parameter structure |
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*/ |
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virtual TDes8* GetCodecConfigParamL(MDataSource* aDataSource) = 0; |
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/** |
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* Get the FourCC of the codec |
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* @return TFourCC |
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*/ |
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virtual TFourCC GetCodecFourCCL() const; |
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/** |
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* Reads the framelength from the header of the given buffer |
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* @param const TUint8* aBuf |
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* @return TInt frame length in bytes |
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*/ |
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virtual TInt FrameLength( const TUint8* aBuf, TInt aDataLen ) const = 0; |
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|
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/** |
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* Returns max coded frame length for the codec. Client can then e.g. allocate buffers based on it |
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* @return TInt Max frame length in bytes |
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*/ |
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virtual TInt MaxFrameLengthL() const = 0; |
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|
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/** |
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* Returns the max used buffer length for this codec. Client can then e.g. allocate buffers based on it |
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* @return TInt Max frame length in bytes |
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*/ |
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virtual TInt MaxBufferLength() const = 0; |
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/** |
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* Returns the CCMRMediaSink/CCMRMediaBuffer compatible type of the codec buffer |
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* @return CCMRMediaBuffer::TBufferType buffer type |
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*/ |
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virtual CCMRMediaBuffer::TBufferType BufferType() const; |
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/** |
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* Configures sample DevSound HW device |
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* @since 2.1 |
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* @return TInt error code |
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*/ |
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virtual TInt AudioHWConfigL(MDataSource* aDataSource, const TDesC8& aParams ) = 0; |
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|
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/** |
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* Get the decoder configuration info |
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* @return HBufC8* info structure |
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*/ |
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virtual HBufC8* GetDecoderConfigInfoLC(); |
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/** |
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* Get the Uid of the SW codec we support |
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* @return TUid Uid |
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*/ |
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virtual TUid SWCodecUid() = 0; |
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/** |
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* Get the preferred samplecount per PCM inputbuffer. |
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* @return TInt samplecount. |
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*/ |
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virtual TInt PreferredSampleCountPerInputBuffer() = 0; |
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|
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/** |
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* Get the preferred framecount per PCM inputbuffer. |
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* @return TInt samplecount. |
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*/ |
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virtual TInt PreferredFrameCountPerInputBuffer() = 0; |
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|
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protected: // member data |
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// FourCC of the codec |
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TFourCC iFourCC; |
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|
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// The selected bitrate of the codec |
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TInt iBitRate; |
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|
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// The selected samplerate of the codec |
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TInt iSampleRate; |
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|
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// The selected channel mode of the codec |
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TInt iChannels; |
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|
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// CCMRMediaSink/CCMRMediaBuffer compatible type of the codec buffer |
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CCMRMediaBuffer::TBufferType iBufferType; |
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// Configuration data structure |
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TDes8* iConfigData; |
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private: |
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// type/location of the codec: HW or SW |
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TCMRCodecType iCodecSWHWType; |
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}; |
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#endif // CCMRAUDIOCODECDATA_H |
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// End of File |