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.
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Dean Camera
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commit
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11 changed files with 621 additions and 22 deletions
208
LUFA/Drivers/USB/Class/Host/Audio.c
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208
LUFA/Drivers/USB/Class/Host/Audio.c
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2011.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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#define __INCLUDE_FROM_USB_DRIVER
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#include "../../Core/USBMode.h"
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#if defined(USB_CAN_BE_HOST)
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#define __INCLUDE_FROM_AUDIO_DRIVER
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#define __INCLUDE_FROM_AUDIO_HOST_C
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#include "Audio.h"
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uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
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uint16_t ConfigDescriptorSize,
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void* ConfigDescriptorData)
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{
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USB_Descriptor_Endpoint_t* DataINEndpoint = NULL;
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USB_Descriptor_Endpoint_t* DataOUTEndpoint = NULL;
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USB_Descriptor_Interface_t* AudioControlInterface = NULL;
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USB_Descriptor_Interface_t* AudioStreamingInterface = NULL;
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memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));
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if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
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return AUDIO_ENUMERROR_InvalidConfigDescriptor;
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while (!(DataINEndpoint) || !(DataOUTEndpoint))
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{
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if (!(AudioControlInterface) ||
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USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
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DComp_NextAudioInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
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{
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if (!(AudioControlInterface) ||
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USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
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DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
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{
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if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
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DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
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{
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return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
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}
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AudioControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
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if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
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DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
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{
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return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
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}
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}
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AudioStreamingInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
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continue;
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}
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USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
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if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
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DataINEndpoint = EndpointData;
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else
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DataOUTEndpoint = EndpointData;
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}
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for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
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{
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uint16_t Size;
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uint8_t Type;
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uint8_t Token;
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uint8_t EndpointAddress;
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bool DoubleBanked;
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if (PipeNum == AudioInterfaceInfo->Config.DataINPipeNumber)
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{
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Size = DataINEndpoint->EndpointSize;
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EndpointAddress = DataINEndpoint->EndpointAddress;
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Token = PIPE_TOKEN_IN;
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Type = EP_TYPE_BULK;
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DoubleBanked = true;
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AudioInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
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}
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else if (PipeNum == AudioInterfaceInfo->Config.DataOUTPipeNumber)
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{
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Size = DataOUTEndpoint->EndpointSize;
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EndpointAddress = DataOUTEndpoint->EndpointAddress;
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Token = PIPE_TOKEN_OUT;
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Type = EP_TYPE_ISOCHRONOUS;
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DoubleBanked = true;
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AudioInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
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}
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else
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{
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continue;
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}
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if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
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DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
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{
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return AUDIO_ENUMERROR_PipeConfigurationFailed;
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}
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}
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AudioInterfaceInfo->State.ControlInterfaceNumber = AudioControlInterface->InterfaceNumber;
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AudioInterfaceInfo->State.StreamingInterfaceNumber = AudioStreamingInterface->InterfaceNumber;
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AudioInterfaceInfo->State.EnabledStreamingAltIndex = AudioStreamingInterface->AlternateSetting;
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AudioInterfaceInfo->State.IsActive = true;
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return AUDIO_ENUMERROR_NoError;
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}
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static uint8_t DComp_NextAudioControlInterface(void* CurrentDescriptor)
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{
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USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
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if (Header->Type == DTYPE_Interface)
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{
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USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
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if ((Interface->Class == AUDIO_CSCP_AudioClass) &&
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(Interface->SubClass == AUDIO_CSCP_ControlSubclass) &&
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(Interface->Protocol == AUDIO_CSCP_ControlProtocol))
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{
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return DESCRIPTOR_SEARCH_Found;
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}
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}
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return DESCRIPTOR_SEARCH_NotFound;
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}
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static uint8_t DComp_NextAudioStreamInterface(void* CurrentDescriptor)
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{
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USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
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if (Header->Type == DTYPE_Interface)
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{
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USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
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if ((Interface->Class == AUDIO_CSCP_AudioClass) &&
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(Interface->SubClass == AUDIO_CSCP_AudioStreamingSubclass) &&
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(Interface->Protocol == AUDIO_CSCP_StreamingProtocol))
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{
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return DESCRIPTOR_SEARCH_Found;
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}
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}
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return DESCRIPTOR_SEARCH_NotFound;
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}
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static uint8_t DComp_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor)
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{
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USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
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if (Header->Type == DTYPE_Endpoint)
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{
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USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);
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if ((Endpoint->Attributes & EP_TYPE_MASK) == EP_TYPE_ISOCHRONOUS)
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return DESCRIPTOR_SEARCH_Found;
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}
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else if (Header->Type == DTYPE_Interface)
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{
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return DESCRIPTOR_SEARCH_Fail;
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}
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return DESCRIPTOR_SEARCH_NotFound;
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}
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uint8_t AUDIO_Host_StartStopStreaming(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
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bool EnableStreaming)
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{
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if (!(AudioInterfaceInfo->State.IsActive))
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return HOST_SENDCONTROL_DeviceDisconnected;
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return USB_Host_SetInterfaceAltSetting(AudioInterfaceInfo->State.StreamingInterfaceNumber,
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EnableStreaming ? AudioInterfaceInfo->State.EnabledStreamingAltIndex : 0);
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}
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#endif
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