author | Mikael Laine <mikael.laine@ixonos.com> |
Fri, 29 Jan 2010 14:08:33 +0200 | |
changeset 0 | 951a5db380a0 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010 Ixonos Plc. |
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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 the "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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* Ixonos Plc |
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* |
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* Description: |
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* |
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*/ |
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#ifndef __CPROCENCODER_H__ |
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#define __CPROCENCODER_H__ |
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#include <e32base.h> |
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#include <f32file.h> |
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#include <MMFCodec.h> |
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#include "AudCommon.h" |
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#include "ProcConstants.h" |
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class CProcEncoder : public CBase |
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{ |
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public: |
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/* |
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* Symbian constructors |
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*/ |
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static CProcEncoder* NewL(); |
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static CProcEncoder* NewLC(); |
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/* |
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* Destructor |
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*/ |
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~CProcEncoder(); |
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/* |
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* Initializes encoder |
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* |
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* @param aAudioType target audio type, EAudAMR and EAudAAC_MPEG4 supported |
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* @param aTargetSamplingRate target sampling rate, 8000, 16000 supported, later 48000 |
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* @param aChannelMode target channel mode EAudSingleChannel supported, stereo later |
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* |
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* @return ETrue if successful, EFalse if not |
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* |
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*/ |
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TBool InitL(TAudType aAudioType, TInt aTargetSamplingRate, TChannelMode aChannelMode, TInt aBitrate); |
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/* |
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* Feed the encoder |
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* If the encoder has enough data, output is written to aEncBuffer |
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* |
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* @param aRawFrame input for the encoder, must have the same sample rate |
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* and channel mode as the desired target |
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* @param aEncBuffer buffer for output |
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* @param aOutputDurationMilli duration of the output buffer in return |
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* |
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* @return ETrue if data was written to aEncBuffer, EFalse otherwise |
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* |
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*/ |
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TBool FillEncBufferL(const TDesC8& aRawFrame, HBufC8* aEncBuffer, TInt& aOutputDurationMilli); |
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/* |
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* Returns the destination audio type |
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* |
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* @return destination audio type |
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*/ |
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TAudType DestAudType(); |
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protected: |
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// constructL |
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void ConstructL(); |
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// C++ constructor |
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CProcEncoder(); |
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// reallocates a data buffer |
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void ReAllocBufferL( CMMFDataBuffer* aBuffer, TInt aNewMaxSize ); |
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// feed codec |
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void FeedCodecL( CMMFCodec* aCodec, CMMFDataBuffer* aSourceBuffer, CMMFDataBuffer* aDestBuffer ); |
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// encodeL |
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TCodecProcessResult EncodeL( CMMFCodec* aCodec, CMMFDataBuffer* aInBuffer, CMMFDataBuffer* aOutBuffer); |
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// is the destination codec supported? |
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TBool GetIsSupportedDestCodec(); |
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// configure AMR encoder |
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void ConfigureAMREncoderL(); |
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// configure AAC encoder |
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void ConfigureAACEncoderL(); |
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// set destination codec |
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void SetDestCodecL(); |
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// is codec available? |
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TBool CheckIfCodecAvailableL(const TDesC8& aCodecFourCCString, const TUid& aCodecUId); |
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protected: |
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// target audio type |
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TAudType iAudioType; |
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// is encoder ready for processing |
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TBool iReady; |
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// Input buffer for raw data |
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CMMFDataBuffer* iSourceInputBuffer; |
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// Input buffer for encoder (alternative output buffer for decoder). |
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CMMFDataBuffer* iDestInputBuffer; |
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// Codec used in decoding input audio to PCM16 |
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CMMFCodec* iDestCodec; |
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// Samplerate to encode to. |
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TInt iToSampleRate; |
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// Number of channels in output and input |
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TInt iToChannels; |
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// target bitrate |
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TInt iToBitRate; |
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// output duration |
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TInt iOutputFrameDurationMilli; |
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// sometimes more than one AMR frame are written to the output with one call |
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TInt iNumberOfFramesInOutputBuffer; |
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// buffer for output |
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HBufC8* iEncBuffer; |
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}; |
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#endif |