Fix bugs in the Host mode Audio class driver.

Demos/Host/LowLevel/AudioInputHost/ConfigDescriptor.c

@@ -92,7 +92,7 @@ uint8_t ProcessConfigurationDescriptor(void)
 			{
 				/* Find a new Audio Control interface if the current one doesn't contain a compatible streaming interface */
 				if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-											  DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				                              DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 				{
 					/* Descriptor not found, error out */
 					return NoCompatibleInterfaceFound;
@@ -103,7 +103,7 @@ uint8_t ProcessConfigurationDescriptor(void)
 
 				/* Find the next Audio Streaming interface within that Audio Control interface */
 				if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-										  DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				                              DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 				{
 					/* Descriptor not found, error out */
 					return NoCompatibleInterfaceFound;

Demos/Host/LowLevel/AudioOutputHost/ConfigDescriptor.c

@@ -88,11 +88,11 @@ uint8_t ProcessConfigurationDescriptor(void)
 			/* Check if we haven't found an Audio Control interface yet, or if we have run out of related Audio Streaming interfaces */
 			if (!(AudioControlInterface) ||
 			    USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-			                              DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				                          DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 			{
 				/* Find a new Audio Control interface if the current one doesn't contain a compatible streaming interface */
 				if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-											  DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				                              DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 				{
 					/* Descriptor not found, error out */
 					return NoCompatibleInterfaceFound;
@@ -103,7 +103,7 @@ uint8_t ProcessConfigurationDescriptor(void)
 
 				/* Find the next Audio Streaming interface within that Audio Control interface */
 				if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-										  DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				                              DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 				{
 					/* Descriptor not found, error out */
 					return NoCompatibleInterfaceFound;

LUFA/Drivers/USB/Class/Host/Audio.c

@@ -62,7 +62,7 @@ uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfa
 			                              DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 			{
 				if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
-											  DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				                              DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 				{
 					return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
 				}
@@ -70,7 +70,7 @@ uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfa
 				AudioControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);			
 
 				if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
-										  DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				                              DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 				{
 					return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
 				}
@@ -102,7 +102,7 @@ uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfa
 			Size            = DataINEndpoint->EndpointSize;
 			EndpointAddress = DataINEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
-			Type            = EP_TYPE_BULK;
+			Type            = EP_TYPE_ISOCHRONOUS;
 			DoubleBanked    = true;
 
 			AudioInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
@@ -211,6 +211,9 @@ uint8_t Audio_GetSetEndpointProperty(USB_ClassInfo_Audio_Host_t* const AudioInte
 			                         uint16_t const DataLength,
 			                         void* const Data)
 {
+	if (!(AudioInterfaceInfo->State.IsActive))
+	  return HOST_SENDCONTROL_DeviceDisconnected;
+
 	uint8_t RequestType;
 	uint8_t EndpointAddress;
 

LUFA/Drivers/USB/Class/Host/Audio.h

@@ -79,8 +79,14 @@
 			{
 				const struct
 				{
-					uint8_t  DataINPipeNumber; /**< Pipe number of the Audio interface's IN data pipe. */
+					uint8_t  DataINPipeNumber; /**< Pipe number of the Audio interface's IN data pipe. If this interface should not
-					uint8_t  DataOUTPipeNumber; /**< Pipe number of the Audio interface's OUT data pipe. */
+					                            *   bind to an IN endpoint, this may be set to 0 to disable audio input streaming for
+					                            *   this driver instance.
+					                            */
+					uint8_t  DataOUTPipeNumber; /**< Pipe number of the Audio interface's OUT data pipe. If this interface should not
+					                            *   bind to an OUT endpoint, this may be set to 0 to disable audio output streaming for
+					                            *   this driver instance.
+					                            */
 				} Config; /**< Config data for the USB class interface within the device. All elements in this section
 				           *   <b>must</b> be set or the interface will fail to enumerate and operate correctly.
 				           */
@@ -325,10 +331,11 @@
 			{
 				Pipe_Write_8(Sample);
 
-				if (Pipe_BytesInPipe() == AudioInterfaceInfo->State.DataOUTPipeSize)
+				if (!(Pipe_IsReadWriteAllowed()))
 				{
 					Pipe_Unfreeze();
 					Pipe_ClearOUT();
+					Pipe_WaitUntilReady();
 					Pipe_Freeze();
 				}
 			}
@@ -348,10 +355,11 @@
 			{
 				Pipe_Write_16_LE(Sample);
 
-				if (Pipe_BytesInPipe() == AudioInterfaceInfo->State.DataOUTPipeSize)
+				if (!(Pipe_IsReadWriteAllowed()))
 				{
 					Pipe_Unfreeze();
 					Pipe_ClearOUT();
+					Pipe_WaitUntilReady();
 					Pipe_Freeze();
 				}
 			}
@@ -372,10 +380,11 @@
 				Pipe_Write_16_LE(Sample);
 				Pipe_Write_8(Sample >> 16);
 
-				if (Pipe_BytesInPipe() == AudioInterfaceInfo->State.DataOUTPipeSize)
+				if (!(Pipe_IsReadWriteAllowed()))
 				{
 					Pipe_Unfreeze();
 					Pipe_ClearOUT();
+					Pipe_WaitUntilReady();
 					Pipe_Freeze();
 				}
 			}