Downmixer no longer does audio unit uniit/reinit on input format change; base node class handles that now.

When a PCMPlayer input is disconnected, stop the pending buffer timer from firing and drain the pending queue.

CocoaSplit/CAMultiAudio/CAMultiAudioDownmixer.m

@@ -193,11 +193,7 @@
 {
     bool retVal;
     NSDictionary *saveData = [self saveDataForPrivateRestore];
-    AudioUnitUninitialize(self.audioUnit);
     retVal = [super setInputStreamFormat:format bus:bus];
-    [self willInitializeNode];
-    AudioUnitInitialize(self.audioUnit);
-    [self didInitializeNode];
     [self restoreDataFromPrivateRestore:saveData];
     return retVal;
 }

CocoaSplit/CAMultiAudio/CAMultiAudioNode.m

@@ -304,7 +304,7 @@ UInt32 inNumberFrames,
 -(bool)setInputStreamFormat:(AVAudioFormat *)format bus:(UInt32)bus
 {
 
-    AudioUnitUninitialize(self.audioUnit);
+    //AudioUnitUninitialize(self.audioUnit);
     
     OSStatus err = AudioUnitSetProperty(self.audioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, bus, format.streamDescription, sizeof(AudioStreamBasicDescription));
 
@@ -324,7 +324,7 @@ UInt32 inNumberFrames,
 
 -(bool)setOutputStreamFormat:(AVAudioFormat *)format bus:(UInt32)bus
 {
-    AudioUnitUninitialize(self.audioUnit);
+    //AudioUnitUninitialize(self.audioUnit);
 
     OSStatus err = AudioUnitSetProperty(self.audioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, bus, format.streamDescription, sizeof(AudioStreamBasicDescription));
 

CocoaSplit/CAMultiAudio/CAMultiAudioPCMPlayer.m

@@ -207,6 +207,21 @@
     [self.pauseBuffer removeAllObjects];
 }
 
+-(void)drainPendingBuffers
+{
+    @synchronized (self) {
+        [_pendingBuffers removeAllObjects];
+    }
+}
+-(void)didRemoveInput
+{
+    if (_pendingTimer)
+    {
+        dispatch_source_cancel(_pendingTimer);
+    }
+    [self drainPendingBuffers];
+}
+
 
 -(void)dealloc
 {