diff -r 000000000000 -r 4e1aa6a622a0 devicesrv_plat/accessory_policy_usb_audio_api/inc/accpolaudiounitbase.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devicesrv_plat/accessory_policy_usb_audio_api/inc/accpolaudiounitbase.h	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,239 @@
+/*
+ * Copyright (c) 2007 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:  Base class for audio unit objects.
+ *
+ */
+
+#ifndef ACCPOLAUDIOUNITBASE_H
+#define ACCPOLAUDIOUNITBASE_H
+
+// SYSTEM INCLUDES
+#include <accpolobjectbase.h>
+#include <accpolobjecttypes.h>
+
+// FORWARD DECLARATIONS
+class CAccPolAudioControlBase;
+
+/**
+ *  Base class for audio unit objects.
+ *
+ *  @accpolaudiodevicetopology.lib
+ */
+NONSHARABLE_CLASS ( CAccPolAudioUnitBase ) : public CAccPolObjectBase
+    {
+public:
+
+    /**
+     * Destructor.
+     */
+    virtual ~CAccPolAudioUnitBase();
+
+    /**
+     * Assign operator for audio unit base class.
+     *
+     * @param CAccPolAudioUnitBase, Const reference to base class to be copied.
+     * @return CAccPolAudioUnitBase, Reference to object pointer.
+     */
+    IMPORT_C CAccPolAudioUnitBase& operator= ( const CAccPolAudioUnitBase& );
+
+    /**
+     * Returns the audio unit Id.
+     *
+     * @return TUint8, Value of the audio unit Id.
+     */
+    IMPORT_C TUint8 UnitId() const;
+
+    /**
+     * Returns the source Id.
+     *
+     * in USB case, Id where this audio unit is linked.
+     * If audio unit cointains more than one Source Ids then the first item of the
+     * source Ids list is returned. Use GetSourceIds method to get list of source Ids.
+     *
+     * @return TUint8, Value of the source Id.
+     */
+    IMPORT_C TUint8 SourceId() const;
+
+    /**
+     * Returns an array which contains list of source Ids.
+     *
+     * in USB case, Id(s) where this audio unit is linked.
+     *
+     * @param aSourceIds, Array which inludes source Ids.
+     * @return void
+     */
+    IMPORT_C void GetSourceIds( RArray<TInt>& aSourceIds ) const;
+
+    /**
+     * Returns the source Id count.
+     *
+     * @return TInt, Source Id count.
+     */
+    IMPORT_C TInt SourceIdCount() const;
+
+    /**
+     * Source Id to store for this audio unit.
+     *
+     * @param aSourceId, Source Id to be stored.
+     * @return void.
+     */
+    IMPORT_C void AddSourceIdL( TUint8 aSourceId );
+
+    /**
+     * Get an audio control object according to the object type and channel number.
+     *
+     * @param aObjectType object type, Following object types are supported EAccPolAudioVolumeControlObject,
+     *                                                                      EAccPolAudioMuteControlObject,
+     *                                                                      EAccPolAudioInputControlObject.
+     * @param aChannel, Channel number. See accpolaudiotopologytypes.h.
+     * @param aAudioControl, On return contains an audio control object if found, otherwise NULL.
+     * @return Tbool, ETrue if audio control object found, otherwise EFalse.
+     */
+    IMPORT_C TBool GetAudioControlL( TTopologyConObjectType aObjectType,
+        TUint32 aChannel,
+        CAccPolAudioControlBase*& aAudioControl ) const;
+
+    /**
+     * Get a channel spesific audio control objects.
+     *
+     * @param aChannel, Channel number. See accpolaudiotopologytypes.h.
+     * @param aAudioControls, On return contains an audio control objects.
+     * If audio control objects not found empty array is returned.
+     * @return void.
+     */
+    IMPORT_C void GetAudioControlsL( TUint32 aChannel,
+        RPointerArray<CAccPolAudioControlBase>& aAudioControls ) const;
+
+    /**
+     * Gets all audio control objects of this audio unit.
+     *
+     * @param aAudioControls on return, contains the audio control objects. If any of an audio control objects not found
+     *        empty array is returned.
+     * @return void.
+     */
+    IMPORT_C void GetAudioControlsL( RPointerArray<CAccPolAudioControlBase>& aAudioControls ) const;
+
+    /**
+     * Get a next audio unit object where this audio unit is linked.
+     *
+     * If audio unit cointains several source id links then the first linked audio unit is returned.
+     *
+     * @param aAudioUnit, On return contains the audio unit object if found, otherwise NULL.
+     * @return Tbool, ETrue if audio unit object found, otherwise EFalse.
+     */
+    IMPORT_C TBool GetNextAudioUnitL( CAccPolAudioUnitBase*& aAudioUnit ) const;
+
+    /**
+     * Get a previous audio unit object where this audio unit is linked.
+     *
+     * @param aAudioUnit, On return contains the audio unit object if found, otherwise NULL.
+     * @return Tbool, ETrue if audio unit object found, otherwise EFalse.
+     */
+    IMPORT_C TBool GetPreviousAudioUnitL( CAccPolAudioUnitBase*& aAudioUnit ) const;
+
+    /**
+     * Get a list of audio units where this audio unit is linked.
+     *
+     * @param aAudioUnits, On return contains an audio unit objects.
+     * If any of an audio unit objects not found empty array is returned.
+     * @return void.
+     */
+    IMPORT_C void GetAudioUnitListL( RPointerArray<CAccPolAudioUnitBase>& aAudioUnits ) const;
+
+    /**
+     * Add an audio control object for this audio unit.
+     *
+     * @param aAudioControl an audio control object to be stored.
+     * @return void.
+     */
+    IMPORT_C void AddControlL( CAccPolAudioControlBase& aAudioControl );
+
+public:
+
+    /**
+     * Returns the previous audio unit Id ( internal use only ).
+     */
+    TUint8 PreviousUnitId() const;
+
+    /**
+     * Sets the previous audio unit Id ( internal use only ).
+     */
+    void SetPreviousUnitId( TUint8 aPreUnitId );
+
+protected:
+
+    /**
+     * Externalize audio control base class.
+     *
+     * @param aStream, Write stream object.
+     * @return void.
+     */
+    IMPORT_C void ExternalizeAudioUnitBaseL( RWriteStream& aStream ) const;
+
+    /**
+     * Internalize audio control base class.
+     *
+     * @param aStream, Read stream object.
+     * @return void.
+     */
+    IMPORT_C void InternalizeAudioUnitBaseL( RReadStream& aStream );
+
+protected:
+
+    /**
+     * C++ default constructor.
+     */
+    CAccPolAudioUnitBase( const TTopologyConObjectType aObjecType,
+        CAccPolObjectCon* aObject = NULL );
+
+    /**
+     * C++ constructor.
+     */
+    CAccPolAudioUnitBase ( const TUint8 aUnitId,
+        const TTopologyConObjectType aObjecType );
+
+    /**
+     * C++ constructor.
+     */
+    CAccPolAudioUnitBase ( const TUint8 aUnitId,
+        const TUint8 aSourceId,
+        const TTopologyConObjectType aObjecType );
+
+private:
+    void CopyL ( const CAccPolAudioUnitBase& aAudioUnitBaseObject );
+    
+private:
+
+    /**
+     * Audio unit Id.
+     */
+    TUint8 iUnitId;
+
+    /**
+     * Audio unit Source Ids.
+     */
+    RArray<TInt> iSourceId;
+
+    /**
+     * Previous audio unit Id.
+     */
+    TUint8 iPreUnitId;
+
+    /**
+     * Control objects of this audio unit.
+     */
+    RPointerArray<CAccPolAudioControlBase> iAudioControls;
+    };
+
+#endif // ACCPOLAUDIOUNITBASE_H