1 /*

     2 * Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 * Name        : logicalbuffersink.h

    16 * Part of     : ACL Logical Layer

    17 *

    18 */

    19 

    20 

    21 

    22 #ifndef LOGICALBUFFERSINK_H

    23 #define LOGICALBUFFERSINK_H

    24 

    25 #include <e32base.h>

    26 #include <f32file.h>

    27 #include <a3f/a3f_trace_utils.h>

    28 #include <a3f/mbuffersink.h>

    29 #include <a3f/maudiodataconsumer.h>

    30 

    31 #include "audioprocessingunit.h"

    32 

    33 #include <a3f/maudioprocessingunitobserver.h>

    34 

    35 

    36 class MLogicalSettingObserver;

    37 

    38 /**

    39 This is the implementation of CAudioSink API.

    40 

    41 @see CAudioComponent

    42 */

    43 NONSHARABLE_CLASS(CLogicalBufferSink) : public CAudioProcessingUnit,

    44 										public MMMFBufferSink,

    45 										public MMMFAudioDataConsumer

    46 	{

    47 friend class CAudioContext;

    48 friend class CLogicalAudioStream;

    49 

    50 public:

    51 

    52 	/**

    53 	Destructor.

    54 

    55 	Deletes all objects and releases all resource owned by this instance.

    56 	*/

    57 	virtual ~CLogicalBufferSink();

    58 

    59 	// from class MBufferSink

    60 	TInt SetDataConsumer(MMMFAudioDataConsumer& aConsumer);

    61 	TInt BufferEmptied(CMMFBuffer* aBuffer);

    62 	TInt BuffersDiscarded();

    63 

    64 	// from class CAudioProcessingUnit

    65 	virtual TBool IsTypeOf(TUid aTypeId) const;

    66 	virtual TAny* Interface(TUid aType);

    67 

    68 	// from MMMFAudioDataConsumer

    69 	void BufferToBeEmptied(MMMFBufferSink* aSink, CMMFBuffer* aBuffer);

    70 	void DiscardBuffers(MMMFBufferSink* aSink);

    71 	/**

    72 	Create a new instance.

    73 

    74 	@return CBufferSink* a pointer to the created instance.

    75 	*/

    76 	static CLogicalBufferSink* NewL(TAny* aParameters);

    77 

    78 private:

    79 

    80 	void ConstructL();

    81 

    82 	CLogicalBufferSink(TAny* aParameters);

    83 

    84 protected:

    85 	// The adaptation buffer sink

    86 	MMMFBufferSink* iAdaptationBufferSink;

    87 

    88 private:

    89 	// The client which requests data

    90 	MMMFAudioDataConsumer *iConsumer;

    91 

    92 	CMMFBuffer* iBuffer;

    93 	};

    94 

    95 #endif // LOGICALBUFFERSINK_H