Added new Host mode Audio Class driver.

Added new EVENT_Audio_StreamStartStopChange() event to the Audio Device Class driver to detect stream start/stop events.

3 files changed, 30 insertions, 4 deletions

diff --git a/LUFA/Drivers/USB/Class/Device/Audio.c b/LUFA/Drivers/USB/Class/Device/Audio.c
index dbf62dae2..60c091e7f 100644
--- a/LUFA/Drivers/USB/Class/Device/Audio.c
+++ b/LUFA/Drivers/USB/Class/Device/Audio.c
@@ -70,6 +70,7 @@ void Audio_Device_ProcessControlRequest(USB_ClassInfo_Audio_Device_t* const Audi
 				Endpoint_ClearStatusStage();
 
 				AudioInterfaceInfo->State.InterfaceEnabled = ((USB_ControlRequest.wValue & 0xFF) != 0);
+				EVENT_Audio_StreamStartStopChange(AudioInterfaceInfo);
 			}
 
 			break;
@@ -164,4 +165,9 @@ bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* const AudioIn
 	return true;
 }
 
+void Audio_Device_Event_Stub(void)
+{
+
+}
+
 #endif
diff --git a/LUFA/Drivers/USB/Class/Device/Audio.h b/LUFA/Drivers/USB/Class/Device/Audio.h
index cad87f3b6..7e7dad88d 100644
--- a/LUFA/Drivers/USB/Class/Device/Audio.h
+++ b/LUFA/Drivers/USB/Class/Device/Audio.h
@@ -101,9 +101,9 @@
 				           */
 				struct
 				{
-					bool     InterfaceEnabled; /**< Set and cleared by the class driver to indicate if the host has enabled the streaming endpoints
-												*   of the Audio Streaming interface.
-												*/
+					bool InterfaceEnabled; /**< Set and cleared by the class driver to indicate if the host has enabled the streaming endpoints
+					                        *   of the Audio Streaming interface.
+					                        */
 				} State; /**< State data for the USB class interface within the device. All elements in this section
 				          *   are reset to their defaults when the interface is enumerated.
 				          */
@@ -160,6 +160,14 @@
 			                                           uint16_t* const DataLength,
 			                                           uint8_t* Data);
 
+			/** Audio class driver event for an Audio Stream start/stop change. This event fires each time the device receives a stream enable or
+			 *  disable control request from the host, to start and stop the audio stream. The current state of the stream can be determined by the
+			 *  State.InterfaceEnabled value inside the Audio interface structure passed as a parameter.
+			 *
+			 *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state.
+			 */
+			void EVENT_Audio_StreamStartStopChange(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo);
+
 		/* Inline Functions: */
 			/** General management task for a given Audio class interface, required for the correct operation of the interface. This should
 			 *  be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().
@@ -348,6 +356,18 @@
 				  Endpoint_ClearIN();
 			}
 
+	/* Private Interface - For use in library only: */
+	#if !defined(__DOXYGEN__)
+		/* Function Prototypes: */
+			#if defined(__INCLUDE_FROM_AUDIO_DEVICE_C)
+				void Audio_Device_Event_Stub(void) ATTR_CONST;
+				
+				void EVENT_Audio_StreamStartStopChange(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
+				                                       ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(Audio_Device_Event_Stub);
+			#endif
+
+	#endif	
+
 	/* Disable C linkage for C++ Compilers: */
 		#if defined(__cplusplus)
 			}
diff --git a/LUFA/Drivers/USB/Class/Device/CDC.h b/LUFA/Drivers/USB/Class/Device/CDC.h
index 6f78a24dd..7dc565c82 100644
--- a/LUFA/Drivers/USB/Class/Device/CDC.h
+++ b/LUFA/Drivers/USB/Class/Device/CDC.h
@@ -177,7 +177,7 @@
 			/** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a
 			 *  control line state change (containing the virtual serial control line states, such as DTR) and may be hooked in the
 			 *  user program by declaring a handler function with the same name and parameters listed here. The new control line states
-			 *  are available in the ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as
+			 *  are available in the State.ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as
 			 *  a mask of CDC_CONTROL_LINE_OUT_* masks.
 			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.