[janderwald] 44559: [MMIXER] - Add more error checks - Fix a bug MMixerGetControlsFromPinByConnectionIndex which pre-early stopped the enumeration of mixer controls - Only add guids which can be later be resolved to mixer control - Check if no a topology connection has no links connected

Author: janderwald
Date: Sun Dec 13 12:32:44 2009
New Revision: 44559

URL: http://svn.reactos.org/svn/reactos?rev=44559&view=rev
Log:
[MMIXER]
- Add more error checks
- Fix a bug MMixerGetControlsFromPinByConnectionIndex which pre-early stopped the
enumeration of mixer controls
- Only add guids which can be later be resolved to mixer control
- Check if no a topology connection has no links connected

Modified:
    trunk/reactos/lib/drivers/sound/mmixer/controls.c
    trunk/reactos/lib/drivers/sound/mmixer/sup.c

Modified: trunk/reactos/lib/drivers/sound/mmixer/controls.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/sound/mmixer/c…
==============================================================================
--- trunk/reactos/lib/drivers/sound/mmixer/controls.c [iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/sound/mmixer/controls.c [iso-8859-1] Sun Dec 13 12:32:44
2009
@@ -96,6 +96,12 @@
     else
         NodeIndex = CurConnection->ToNode;
 
+    if (NodeIndex > NodeTypes->Count)
+    {
+        // reached end of pin connection
+        return MM_STATUS_SUCCESS;
+    }
+
     /* get target node type of current connection */
     NodeType = MMixerGetNodeType(NodeTypes, NodeIndex);
 
@@ -124,7 +130,7 @@
         Status = MMixerGetNodeIndexes(MixerContext, NodeConnections, NodeIndex, TRUE,
TRUE, &NodeConnectionCount, &NodeConnection);
     }
 
-    if (Status != MM_STATUS_SUCCESS)
+    if (Status == MM_STATUS_SUCCESS)
     {
         for(Index = 0; Index < NodeConnectionCount; Index++)
         {
@@ -332,6 +338,7 @@
     LPWSTR PinName;
     GUID NodeType;
     ULONG BytesReturned, ControlCount, Index;
+    LPGUID Node;
     PULONG Nodes;
 
     if (!bTargetPin)
@@ -414,8 +421,14 @@
     {
         if (Nodes[Index])
         {
-            // found a node
-            ControlCount++;
+            // get node type
+            Node = MMixerGetNodeType(NodeTypes, Index);
+
+            if (MMixerGetControlTypeFromTopologyNode(Node))
+            {
+                // found a node which can be resolved to a type
+                ControlCount++;
+            }
         }
     }
 
@@ -457,14 +470,20 @@
         {
             if (Nodes[Index])
             {
-                /* store the node index for retrieving / setting details */
-                SrcLine->NodeIds[ControlCount] = Index;
-
-                Status = MMixerAddMixerControl(MixerContext, MixerInfo, hDevice,
NodeTypes, Index, SrcLine, &SrcLine->LineControls[ControlCount]);
-                if (Status == MM_STATUS_SUCCESS)
+                // get node type
+                Node = MMixerGetNodeType(NodeTypes, Index);
+
+                if (MMixerGetControlTypeFromTopologyNode(Node))
                 {
-                    /* increment control count on success */
-                    ControlCount++;
+                    /* store the node index for retrieving / setting details */
+                    SrcLine->NodeIds[ControlCount] = Index;
+
+                    Status = MMixerAddMixerControl(MixerContext, MixerInfo, hDevice,
NodeTypes, Index, SrcLine, &SrcLine->LineControls[ControlCount]);
+                    if (Status == MM_STATUS_SUCCESS)
+                    {
+                        /* increment control count on success */
+                        ControlCount++;
+                    }
                 }
             }
         }
@@ -902,8 +921,6 @@
         return Status;
     }
 
-
-
     RtlZeroMemory(Pins, sizeof(ULONG) * PinCount);
     // now get the target pins of the ADC / DAC node
     Status = MMixerGetTargetPins(MixerContext, NodeTypes, NodeConnections, NodeIndex,
bInputMixer, Pins, PinCount);

Modified: trunk/reactos/lib/drivers/sound/mmixer/sup.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/sound/mmixer/s…
==============================================================================
--- trunk/reactos/lib/drivers/sound/mmixer/sup.c [iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/sound/mmixer/sup.c [iso-8859-1] Sun Dec 13 12:32:44 2009
@@ -251,6 +251,13 @@
         Connection++;
     }
 
+    if (!Count)
+    {
+        *NodeReferenceCount = 0;
+        *NodeReference = NULL;
+        return MM_STATUS_SUCCESS;
+    }
+
     ASSERT(Count != 0);
 
     /* now allocate node index array */