--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devicesrv_plat/accessory_policy_usb_audio_api/inc/accpolaudiocontrolbase.h	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,137 @@
+/*
+ * 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 control objects.
+ *
+ */
+
+#ifndef ACCPOLAUDIOCONTROLBASE_H
+#define ACCPOLAUDIOCONTROLBASE_H
+
+// SYSTEM INCLUDES
+#include <accpolobjectbase.h>
+#include <accpolobjecttypes.h>
+
+// DATA TYPES
+/**
+ * Supported audio controls for feature unit.
+ */
+const TUint32 KAccMuteControl   = 0x1; // 00000 00000 00000 00001
+const TUint32 KAccVolumeControl = 0x2; // 00000 00000 00000 00010
+
+/**
+ * Predefined channel types.
+ */
+const TUint32 KAccMasterChannel     = 0x0;
+const TUint32 KAccLeftFrontChannel  = 0x1; // 00000 00000 00000 00001
+const TUint32 KAccRightFrontChannel = 0x2; // 00000 00000 00000 00010
+const TUint32 KAccChannelCount      = 3;
+
+/**
+ *  Base class for audio control objects.
+ *
+ *  @accpolaudiodevicetopology.lib
+ */
+NONSHARABLE_CLASS ( CAccPolAudioControlBase ) : public CAccPolObjectBase
+    {
+public:
+
+    /**
+     * Destructor.
+     */
+    virtual ~CAccPolAudioControlBase();
+
+    /**
+     * Assign operator for audio control base class.
+     *
+     * @param CAccPolAudioControlBase, Const reference to object to be copied.
+     * @return CAccPolAudioControlBase, Reference to object pointer.
+     */
+    IMPORT_C CAccPolAudioControlBase& operator= ( const CAccPolAudioControlBase& );
+
+    /**
+     * Returns the audio unit Id, where the audio control parameters are associated.
+     *
+     * @return TInt, Value of the audio unit Id.
+     */
+    IMPORT_C TUint8 UnitId() const;
+
+    /**
+     * Sets the unit Id.
+     *
+     * @param aUnitId, Unit Id to be stored.
+     * @return void.
+     */
+    IMPORT_C void SetUnitId( TUint8 aUnitId );
+
+    /**
+     * Sets a channel number where this audio control parameter(s) is/are associated.
+     *
+     * @param aChannel, Channel number. See accpolaudiotopologytypes.h.
+     * @return void.
+     */
+    IMPORT_C void SetChannel( TUint32 aChannel );
+
+    /**
+     * Returns the channel number where the audio control parameter(s) is/are associated.
+     *
+     * @return TUint32, Value of channel number.
+     */
+    IMPORT_C TUint32 Channel() const;
+
+protected:
+
+    /**
+     * Externalize audio control base class.
+     *
+     * @param aStream, Write stream object.
+     * @return void.
+     */
+    IMPORT_C void ExternalizeAudioControlbaseL( RWriteStream& aStream ) const;
+
+    /**
+     * Internalize audio control base class.
+     *
+     * @param aStream, Read stream object.
+     * @return void.
+     */
+    IMPORT_C void InternalizeAudioControlbaseL( RReadStream& aStream );
+
+protected:
+
+    /**
+     * C++ default constructor.
+     */
+    CAccPolAudioControlBase( TTopologyConObjectType aObjectType,
+        CAccPolObjectCon* aObject = NULL );
+
+    /**
+     * C++ default constructor.
+     */
+    CAccPolAudioControlBase( TTopologyConObjectType aObjectType,
+        TUint32 aChannel );
+
+private:
+
+    /**
+     * Unit Id.
+     */
+    TUint8 iUnitId;
+
+    /**
+     * Channel number.
+     */
+    TUint32 iChannel;
+    };
+
+#endif // ACCPOLAUDIOCONTROLBASE_H