diff -r 71ca22bcf22a -r 5a06f39ad45b khronosfws/openmax_al/src/engine/xadevicevolumeitf.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/khronosfws/openmax_al/src/engine/xadevicevolumeitf.c	Fri Apr 16 15:29:42 2010 +0300
@@ -0,0 +1,211 @@
+/*
+* Copyright (c) 2009 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: 
+*
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "xaglobals.h"
+#include "xadevicevolumeitf.h"
+#ifdef _GSTREAMER_BACKEND_  
+#include "XADeviceVolumeItfAdaptation.h"
+#endif
+
+static XADeviceVolumeItfImpl* GetImpl(XADeviceVolumeItf self)
+{
+    if( self )
+    {
+        XADeviceVolumeItfImpl* impl = (XADeviceVolumeItfImpl*)(*self);
+        if( impl && (impl == impl->self) )
+        {
+            return impl;
+        }
+    }
+    return NULL;
+}
+
+/**
+ * Base interface XADeviceVolumeItf implementation
+ */
+
+/* XAresult XADeviceVolumeItfImpl_GetVolumeScale( XADeviceVolumeItf self,
+ *                                                XAuint32 deviceID,
+ *                                                XAint32* pMinValue,
+ *                                                XAint32* pMaxValue,
+ *                                                XAboolean* pIsMillibelScale)
+ * Description: Gets the properties of the volume scale supported by the given device.
+ */
+XAresult XADeviceVolumeItfImpl_GetVolumeScale( XADeviceVolumeItf self,
+                                               XAuint32 deviceID,
+                                               XAint32* pMinValue,
+                                               XAint32* pMaxValue,
+                                               XAboolean* pIsMillibelScale)
+{
+    XADeviceVolumeItfImpl* impl = GetImpl(self);
+    XAresult ret = XA_RESULT_SUCCESS;
+    XAboolean supported = XA_BOOLEAN_FALSE;
+    DEBUG_API("->XADeviceVolumeItfImpl_GetVolumeScale");
+    if( !impl || !pMinValue || !pMaxValue || !pIsMillibelScale )
+    {
+        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
+        DEBUG_API("<-XADeviceVolumeItfImpl_GetVolumeScale");
+        return XA_RESULT_PARAMETER_INVALID;
+    }
+
+#ifdef _GSTREAMER_BACKEND_  
+    ret = XADeviceVolumeItfAdapt_IsDeviceIDSupported(impl->adapCtx, deviceID, &supported);
+#endif
+    if( ret != XA_RESULT_SUCCESS || supported != XA_BOOLEAN_TRUE )
+    {
+        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
+        DEBUG_API("<-XADeviceVolumeItfImpl_GetVolumeScale");
+        return XA_RESULT_PARAMETER_INVALID;
+    }
+
+    *pMinValue = impl->minVolume;
+    *pMaxValue = impl->maxVolume;
+    *pIsMillibelScale = impl->ismBscale;
+
+    DEBUG_API("<-XADeviceVolumeItfImpl_GetVolumeScale");
+    return ret;
+}
+
+/* XAresult XADeviceVolumeItfImpl_SetVolume( XADeviceVolumeItf self,
+ *                                           XAuint32 deviceID,
+ *                                           XAint32 volume)
+ * Description: Sets the device's volume.
+ */
+XAresult XADeviceVolumeItfImpl_SetVolume( XADeviceVolumeItf self,
+                                          XAuint32 deviceID,
+                                          XAint32 volume)
+{
+    XADeviceVolumeItfImpl* impl = GetImpl(self);
+    XAresult ret = XA_RESULT_SUCCESS;
+#ifdef _GSTREAMER_BACKEND_  
+    XAboolean supported = XA_BOOLEAN_FALSE;
+#endif
+    DEBUG_API("->XADeviceVolumeItfImpl_SetVolume");
+
+    if( !impl || volume < impl->minVolume || volume > impl->maxVolume )
+    {
+        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
+        DEBUG_API("<-XADeviceVolumeItfImpl_SetVolume");
+        return XA_RESULT_PARAMETER_INVALID;
+    }
+
+#ifdef _GSTREAMER_BACKEND_  
+    ret = XADeviceVolumeItfAdapt_IsDeviceIDSupported(impl->adapCtx, deviceID, &supported);
+    if( ret != XA_RESULT_SUCCESS || supported != XA_BOOLEAN_TRUE )
+    {
+        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
+        DEBUG_API("<-XADeviceVolumeItfImpl_SetVolume");
+        return XA_RESULT_PARAMETER_INVALID;
+    }
+
+    ret = XADeviceVolumeItfAdapt_SetVolume(impl->adapCtx, deviceID, volume);
+
+    if( ret == XA_RESULT_SUCCESS )
+    {
+        impl->curVolume = volume;
+    }
+#endif
+    DEBUG_API("<-XADeviceVolumeItfImpl_SetVolume");
+    return ret;
+}
+
+/* XAresult XADeviceVolumeItfImpl_GetVolume( XADeviceVolumeItf self,
+ *                                           XAuint32 deviceID,
+ *                                           XAint32 * pVolume)
+ * Description: Gets the device's volume.
+ */
+XAresult XADeviceVolumeItfImpl_GetVolume( XADeviceVolumeItf self,
+                                          XAuint32 deviceID,
+                                          XAint32 * pVolume)
+{
+    XADeviceVolumeItfImpl* impl = GetImpl(self);
+    XAresult ret = XA_RESULT_SUCCESS;
+    XAboolean supported = XA_BOOLEAN_FALSE;
+    DEBUG_API("->XADeviceVolumeItfImpl_GetVolume");
+
+    if( !impl || !pVolume )
+    {
+        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
+        DEBUG_API("<-XADeviceVolumeItfImpl_GetVolume");
+        return XA_RESULT_PARAMETER_INVALID;
+    }
+
+#ifdef _GSTREAMER_BACKEND_  
+    ret = XADeviceVolumeItfAdapt_IsDeviceIDSupported(impl->adapCtx, deviceID, &supported);
+#endif
+    if( ret != XA_RESULT_SUCCESS || supported != XA_BOOLEAN_TRUE )
+    {
+        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
+        DEBUG_API("<-XADeviceVolumeItfImpl_GetVolume");
+        return XA_RESULT_PARAMETER_INVALID;
+    }
+    *pVolume = impl->curVolume;
+    DEBUG_API("<-XADeviceVolumeItfImpl_GetVolume");
+    return XA_RESULT_SUCCESS;
+}
+
+/**
+ * XADeviceVolumeItfImpl -specific methods
+ **/
+#ifdef _GSTREAMER_BACKEND_  
+/**
+ * XADeviceVolumeItfImpl* XADeviceVolumeItfImpl_Create(XAAdaptationBaseCtx *adapCtx)
+ * Description: Allocate and initialize DeviceVolumeImpl
+ **/
+XADeviceVolumeItfImpl* XADeviceVolumeItfImpl_Create(XAAdaptationBaseCtx *adapCtx)
+{
+    XADeviceVolumeItfImpl* self = (XADeviceVolumeItfImpl*)
+        calloc(1,sizeof(XADeviceVolumeItfImpl));
+    DEBUG_API("->XADeviceVolumeItfImpl_Create");
+
+    if(self)
+    {
+        /* init itf default implementation */
+        self->itf.GetVolumeScale =
+            XADeviceVolumeItfImpl_GetVolumeScale;
+        self->itf.GetVolume =
+            XADeviceVolumeItfImpl_GetVolume;
+        self->itf.SetVolume =
+            XADeviceVolumeItfImpl_SetVolume;
+
+        /* init variables */
+        /* these values are replaced by adaptation in init phase */
+        self->curVolume = DEFAULTDEVICEVOLUME;
+        self->minVolume = DEFAULTDEVICEMINVOLUME;
+        self->maxVolume = DEFAULTDEVICEMAXVOLUME;
+        self->ismBscale = DEFAULTSCALEISMILLIBEL;
+
+        self->adapCtx = adapCtx;
+        self->self = self;
+    }
+    DEBUG_API("<-XADeviceVolumeItfImpl_Create");
+    return self;
+}
+#endif
+/* void XADeviceVolumeItfImpl_Free(XADeviceVolumeItfImpl* self)
+ * Description: Free all resources reserved at XADeviceVolumeItfImpl_Create
+ */
+void XADeviceVolumeItfImpl_Free(XADeviceVolumeItfImpl* self)
+{
+    DEBUG_API("->XADeviceVolumeItfImpl_Free");
+    assert(self==self->self);
+    free(self);
+    DEBUG_API("<-XADeviceVolumeItfImpl_Free");
+}