X-Git-Url: http://git.linex4red.de/pub/lufa.git/blobdiff_plain/605ef921cc189d9a55ce3787a2ac1dd78ef4d14e..e572ee7ff271a3f454fcd8a5fb0d2079bbda4be2:/LUFA/Drivers/USB/Class/Host/Audio.c

diff --git a/LUFA/Drivers/USB/Class/Host/Audio.c b/LUFA/Drivers/USB/Class/Host/Audio.c
new file mode 100644
index 000000000..7397ef986
--- /dev/null
+++ b/LUFA/Drivers/USB/Class/Host/Audio.c
@@ -0,0 +1,208 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaim all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+#define  __INCLUDE_FROM_USB_DRIVER
+#include "../../Core/USBMode.h"
+
+#if defined(USB_CAN_BE_HOST)
+
+#define  __INCLUDE_FROM_AUDIO_DRIVER
+#define  __INCLUDE_FROM_AUDIO_HOST_C
+#include "Audio.h"
+
+uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
+                                  uint16_t ConfigDescriptorSize,
+                                  void* ConfigDescriptorData)
+{
+	USB_Descriptor_Endpoint_t*  DataINEndpoint          = NULL;
+	USB_Descriptor_Endpoint_t*  DataOUTEndpoint         = NULL;
+	USB_Descriptor_Interface_t* AudioControlInterface   = NULL;
+	USB_Descriptor_Interface_t* AudioStreamingInterface = NULL;
+
+	memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));
+
+	if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
+	  return AUDIO_ENUMERROR_InvalidConfigDescriptor;
+
+	while (!(DataINEndpoint) || !(DataOUTEndpoint))
+	{
+		if (!(AudioControlInterface) ||
+		    USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+		                              DComp_NextAudioInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
+		{
+			if (!(AudioControlInterface) ||
+			    USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+			                              DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+			{
+				if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+											  DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				{
+					return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
+				}
+
+				AudioControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);			
+
+				if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+										  DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				{
+					return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
+				}
+			}
+
+			AudioStreamingInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
+
+			continue;
+		}
+
+		USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
+
+		if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
+		  DataINEndpoint  = EndpointData;
+		else
+		  DataOUTEndpoint = EndpointData;
+	}
+
+	for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
+	{
+		uint16_t Size;
+		uint8_t  Type;
+		uint8_t  Token;
+		uint8_t  EndpointAddress;
+		bool     DoubleBanked;
+
+		if (PipeNum == AudioInterfaceInfo->Config.DataINPipeNumber)
+		{
+			Size            = DataINEndpoint->EndpointSize;
+			EndpointAddress = DataINEndpoint->EndpointAddress;
+			Token           = PIPE_TOKEN_IN;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = true;
+
+			AudioInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
+		}
+		else if (PipeNum == AudioInterfaceInfo->Config.DataOUTPipeNumber)
+		{
+			Size            = DataOUTEndpoint->EndpointSize;
+			EndpointAddress = DataOUTEndpoint->EndpointAddress;
+			Token           = PIPE_TOKEN_OUT;
+			Type            = EP_TYPE_ISOCHRONOUS;
+			DoubleBanked    = true;
+
+			AudioInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
+		}
+		else
+		{
+			continue;
+		}
+		
+		if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
+		                         DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
+		{
+			return AUDIO_ENUMERROR_PipeConfigurationFailed;
+		}
+	}
+
+	AudioInterfaceInfo->State.ControlInterfaceNumber    = AudioControlInterface->InterfaceNumber;
+	AudioInterfaceInfo->State.StreamingInterfaceNumber  = AudioStreamingInterface->InterfaceNumber;
+	AudioInterfaceInfo->State.EnabledStreamingAltIndex  = AudioStreamingInterface->AlternateSetting;
+	AudioInterfaceInfo->State.IsActive = true;
+	
+	return AUDIO_ENUMERROR_NoError;
+}
+
+static uint8_t DComp_NextAudioControlInterface(void* CurrentDescriptor)
+{
+	USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
+
+	if (Header->Type == DTYPE_Interface)
+	{
+		USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
+
+		if ((Interface->Class    == AUDIO_CSCP_AudioClass) &&
+		    (Interface->SubClass == AUDIO_CSCP_ControlSubclass) &&
+		    (Interface->Protocol == AUDIO_CSCP_ControlProtocol))
+		{
+			return DESCRIPTOR_SEARCH_Found;
+		}
+	}
+
+	return DESCRIPTOR_SEARCH_NotFound;
+}
+
+static uint8_t DComp_NextAudioStreamInterface(void* CurrentDescriptor)
+{
+	USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
+
+	if (Header->Type == DTYPE_Interface)
+	{
+		USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
+
+		if ((Interface->Class    == AUDIO_CSCP_AudioClass) &&
+		    (Interface->SubClass == AUDIO_CSCP_AudioStreamingSubclass) &&
+		    (Interface->Protocol == AUDIO_CSCP_StreamingProtocol))
+		{
+			return DESCRIPTOR_SEARCH_Found;
+		}
+	}
+
+	return DESCRIPTOR_SEARCH_NotFound;
+}
+
+static uint8_t DComp_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor)
+{
+	USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
+
+	if (Header->Type == DTYPE_Endpoint)
+	{
+		USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);
+
+		if ((Endpoint->Attributes & EP_TYPE_MASK) == EP_TYPE_ISOCHRONOUS)
+		  return DESCRIPTOR_SEARCH_Found;
+	}
+	else if (Header->Type == DTYPE_Interface)
+	{
+		return DESCRIPTOR_SEARCH_Fail;
+	}
+
+	return DESCRIPTOR_SEARCH_NotFound;
+}
+
+uint8_t AUDIO_Host_StartStopStreaming(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
+			                          bool EnableStreaming)
+{
+	if (!(AudioInterfaceInfo->State.IsActive))
+	  return HOST_SENDCONTROL_DeviceDisconnected;
+
+	return USB_Host_SetInterfaceAltSetting(AudioInterfaceInfo->State.StreamingInterfaceNumber,
+	                                       EnableStreaming ? AudioInterfaceInfo->State.EnabledStreamingAltIndex : 0);
+}
+
+#endif
+