Added new EVENT_Audio_StreamStartStopChange() event to the Audio Device Class driver to detect stream start/stop events.pull/1469/head
Dean Camera
14 years ago
parent
605ef921cc
commit
e572ee7ff2
File diff suppressed because one or more lines are too long
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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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@ -0,0 +1,355 @@
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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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/** \file
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* \brief Host mode driver for the library USB Audio Class driver.
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*
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* Host mode driver for the library USB Audio Class driver.
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*
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* \note This file should not be included directly. It is automatically included as needed by the USB module driver
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* dispatch header located in LUFA/Drivers/USB.h.
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*/
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/** \ingroup Group_USBClassAudio
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* \defgroup Group_USBClassAudioHost Audio Class Host Mode Driver
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*
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* \section Sec_Dependencies Module Source Dependencies
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* The following files must be built with any user project that uses this module:
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* - LUFA/Drivers/USB/Class/Host/Audio.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
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*
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* \section Sec_ModDescription Module Description
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* Host Mode USB Class driver framework interface, for the Audio USB Class driver.
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*
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* @{
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*/
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#ifndef __AUDIO_CLASS_HOST_H__
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#define __AUDIO_CLASS_HOST_H__
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/* Includes: */
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#include "../../USB.h"
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#include "../Common/Audio.h"
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/* Enable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Preprocessor Checks: */
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#if !defined(__INCLUDE_FROM_AUDIO_DRIVER)
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#error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
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#endif
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/* Public Interface - May be used in end-application: */
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/* Type Defines: */
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/** \brief Audio Class Host Mode Configuration and State Structure.
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*
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* Class state structure. An instance of this structure should be made within the user application,
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* and passed to each of the Audio class driver functions as the \c AudioInterfaceInfo parameter. This
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* stores each Audio interface's configuration and state information.
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*/
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typedef struct
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{
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const struct
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{
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uint8_t DataINPipeNumber; /**< Pipe number of the Audio interface's IN data pipe. */
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uint8_t DataOUTPipeNumber; /**< Pipe number of the Audio interface's OUT data pipe. */
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} Config; /**< Config data for the USB class interface within the device. All elements in this section
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* <b>must</b> be set or the interface will fail to enumerate and operate correctly.
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*/
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struct
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{
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bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
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* after \ref Audio_Host_ConfigurePipes() is called and the Host state machine is in the
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* Configured state.
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*/
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uint8_t ControlInterfaceNumber; /**< Interface index of the Audio Control interface within the attached device. */
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uint8_t StreamingInterfaceNumber; /**< Interface index of the Audio Streaming interface within the attached device. */
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uint8_t EnabledStreamingAltIndex; /**< Alternative setting index of the Audio Streaming interface when the stream is enabled. */
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uint16_t DataINPipeSize; /**< Size in bytes of the Audio interface's IN data pipe. */
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uint16_t DataOUTPipeSize; /**< Size in bytes of the Audio interface's OUT data pipe. */
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} State; /**< State data for the USB class interface within the device. All elements in this section
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* <b>may</b> be set to initial values, but may also be ignored to default to sane values when
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* the interface is enumerated.
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*/
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} USB_ClassInfo_Audio_Host_t;
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/* Enums: */
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/** Enum for the possible error codes returned by the \ref Audio_Host_ConfigurePipes() function. */
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enum AUDIO_Host_EnumerationFailure_ErrorCodes_t
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{
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AUDIO_ENUMERROR_NoError = 0, /**< Configuration Descriptor was processed successfully. */
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AUDIO_ENUMERROR_InvalidConfigDescriptor = 1, /**< The device returned an invalid Configuration Descriptor. */
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AUDIO_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible AUDIO interface was not found in the device's Configuration Descriptor. */
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AUDIO_ENUMERROR_PipeConfigurationFailed = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
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};
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/* Function Prototypes: */
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/** Host interface configuration routine, to configure a given Audio host interface instance using the Configuration
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* Descriptor read from an attached USB device. This function automatically updates the given Audio Host instance's
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* state values and configures the pipes required to communicate with the interface if it is found within the
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* device. This should be called once after the stack has enumerated the attached device, while the host state
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* machine is in the Addressed state.
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*
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* \note The pipe index numbers as given in the interface's configuration structure must not overlap with any other
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* interface, or pipe bank corruption will occur. Gaps in the allocated pipe numbers or non-sequential indexes
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* within a single interface is allowed, but no two interfaces of any type have have interleaved pipe indexes.
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* \n\n
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*
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* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class host configuration and state.
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* \param[in] ConfigDescriptorSize Length of the attached device's Configuration Descriptor.
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* \param[in] DeviceConfigDescriptor Pointer to a buffer containing the attached device's Configuration Descriptor.
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*
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* \return A value from the \ref AUDIO_Host_EnumerationFailure_ErrorCodes_t enum.
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*/
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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* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
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/** Starts or stops the audio streaming for the given configured Audio Host interface, allowing for audio samples to be
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* send and/or received.
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*
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* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class host configuration and state.
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* \param[in] EnableStreaming Boolean true to enable streaming of the specified interface, false to disable
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*
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* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
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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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/* Inline Functions: */
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/** General management task for a given Audio host class interface, required for the correct operation of
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* the interface. This should be called frequently in the main program loop, before the master USB management task
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* \ref USB_USBTask().
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*
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* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class host configuration and state.
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*/
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static inline void Audio_Host_USBTask(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo);
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||||||
|
static inline void Audio_Host_USBTask(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
{
|
||||||
|
(void)AudioInterfaceInfo;
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Determines if the given audio interface is ready for a sample to be read from it, and selects the streaming
|
||||||
|
* IN pipe ready for reading.
|
||||||
|
*
|
||||||
|
* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or
|
||||||
|
* the call will fail.
|
||||||
|
*
|
||||||
|
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
|
||||||
|
*
|
||||||
|
* \return Boolean \c true if the given Audio interface has a sample to be read, \c false otherwise.
|
||||||
|
*/
|
||||||
|
static inline bool Audio_Host_IsSampleReceived(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||||||
|
static inline bool Audio_Host_IsSampleReceived(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
{
|
||||||
|
if ((USB_HostState != HOST_STATE_Configured) || !(AudioInterfaceInfo->State.IsActive))
|
||||||
|
return false;
|
||||||
|
|
||||||
|
Pipe_SelectPipe(AudioInterfaceInfo->Config.DataOUTPipeNumber);
|
||||||
|
return Pipe_IsINReceived();
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Determines if the given audio interface is ready to accept the next sample to be written to it, and selects
|
||||||
|
* the streaming OUT pipe ready for writing.
|
||||||
|
*
|
||||||
|
* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or
|
||||||
|
* the call will fail.
|
||||||
|
*
|
||||||
|
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
|
||||||
|
*
|
||||||
|
* \return Boolean \c true if the given Audio interface is ready to accept the next sample, \c false otherwise.
|
||||||
|
*/
|
||||||
|
static inline bool Audio_Host_IsReadyForNextSample(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||||||
|
static inline bool Audio_Host_IsReadyForNextSample(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
{
|
||||||
|
if ((USB_HostState != HOST_STATE_Configured) || !(AudioInterfaceInfo->State.IsActive))
|
||||||
|
return false;
|
||||||
|
|
||||||
|
Pipe_SelectPipe(AudioInterfaceInfo->Config.DataINPipeNumber);
|
||||||
|
return Pipe_IsOUTReady();
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Reads the next 8-bit audio sample from the current audio interface.
|
||||||
|
*
|
||||||
|
* \pre This should be preceded immediately by a call to the \ref Audio_Host_IsSampleReceived() function to ensure
|
||||||
|
* that the correct pipe is selected and ready for data.
|
||||||
|
*
|
||||||
|
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
|
||||||
|
*
|
||||||
|
* \return Signed 8-bit audio sample from the audio interface.
|
||||||
|
*/
|
||||||
|
static inline int8_t Audio_Host_ReadSample8(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||||||
|
static inline int8_t Audio_Host_ReadSample8(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
{
|
||||||
|
int8_t Sample;
|
||||||
|
|
||||||
|
(void)AudioInterfaceInfo;
|
||||||
|
|
||||||
|
Sample = Pipe_Read_8();
|
||||||
|
|
||||||
|
if (!(Pipe_BytesInPipe()))
|
||||||
|
Pipe_ClearIN();
|
||||||
|
|
||||||
|
return Sample;
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Reads the next 16-bit audio sample from the current audio interface.
|
||||||
|
*
|
||||||
|
* \pre This should be preceded immediately by a call to the \ref Audio_Host_IsSampleReceived() function to ensure
|
||||||
|
* that the correct pipe is selected and ready for data.
|
||||||
|
*
|
||||||
|
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
|
||||||
|
*
|
||||||
|
* \return Signed 16-bit audio sample from the audio interface.
|
||||||
|
*/
|
||||||
|
static inline int16_t Audio_Host_ReadSample16(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||||||
|
static inline int16_t Audio_Host_ReadSample16(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
{
|
||||||
|
int16_t Sample;
|
||||||
|
|
||||||
|
(void)AudioInterfaceInfo;
|
||||||
|
|
||||||
|
Sample = (int16_t)Pipe_Read_16_LE();
|
||||||
|
|
||||||
|
if (!(Pipe_BytesInPipe()))
|
||||||
|
Pipe_ClearIN();
|
||||||
|
|
||||||
|
return Sample;
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Reads the next 24-bit audio sample from the current audio interface.
|
||||||
|
*
|
||||||
|
* \pre This should be preceded immediately by a call to the \ref Audio_Host_IsSampleReceived() function to ensure
|
||||||
|
* that the correct pipe is selected and ready for data.
|
||||||
|
*
|
||||||
|
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
|
||||||
|
*
|
||||||
|
* \return Signed 24-bit audio sample from the audio interface.
|
||||||
|
*/
|
||||||
|
static inline int32_t Audio_Host_ReadSample24(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||||||
|
static inline int32_t Audio_Host_ReadSample24(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
|
||||||
|
{
|
||||||
|
int32_t Sample;
|
||||||
|
|
||||||
|
(void)AudioInterfaceInfo;
|
||||||
|
|
||||||
|
Sample = (((uint32_t)Pipe_Read_8() << 16) | Pipe_Read_16_LE());
|
||||||
|
|
||||||
|
if (!(Pipe_BytesInPipe()))
|
||||||
|
Pipe_ClearIN();
|
||||||
|
|
||||||
|
return Sample;
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Writes the next 8-bit audio sample to the current audio interface.
|
||||||
|
*
|
||||||
|
* \pre This should be preceded immediately by a call to the \ref Audio_Host_IsReadyForNextSample() function to
|
||||||
|
* ensure that the correct pipe is selected and ready for data.
|
||||||
|
*
|
||||||
|
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
|
||||||
|
* \param[in] Sample Signed 8-bit audio sample.
|
||||||
|
*/
|
||||||
|
static inline void Audio_Host_WriteSample8(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
|
||||||
|
const int8_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||||||
|
static inline void Audio_Host_WriteSample8(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
|
||||||
|
const int8_t Sample)
|
||||||
|
{
|
||||||
|
Pipe_Write_8(Sample);
|
||||||
|
|
||||||
|
if (Pipe_BytesInPipe() == AudioInterfaceInfo->State.DataINPipeSize)
|
||||||
|
Pipe_ClearOUT();
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Writes the next 16-bit audio sample to the current audio interface.
|
||||||
|
*
|
||||||
|
* \pre This should be preceded immediately by a call to the \ref Audio_Host_IsReadyForNextSample() function to
|
||||||
|
* ensure that the correct pipe is selected and ready for data.
|
||||||
|
*
|
||||||
|
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
|
||||||
|
* \param[in] Sample Signed 16-bit audio sample.
|
||||||
|
*/
|
||||||
|
static inline void Audio_Host_WriteSample16(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
|
||||||
|
const int16_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||||||
|
static inline void Audio_Host_WriteSample16(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
|
||||||
|
const int16_t Sample)
|
||||||
|
{
|
||||||
|
Pipe_Write_16_LE(Sample);
|
||||||
|
|
||||||
|
if (Pipe_BytesInPipe() == AudioInterfaceInfo->State.DataINPipeSize)
|
||||||
|
Pipe_ClearOUT();
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Writes the next 24-bit audio sample to the current audio interface.
|
||||||
|
*
|
||||||
|
* \pre This should be preceded immediately by a call to the \ref Audio_Host_IsReadyForNextSample() function to
|
||||||
|
* ensure that the correct pipe is selected and ready for data.
|
||||||
|
*
|
||||||
|
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
|
||||||
|
* \param[in] Sample Signed 24-bit audio sample.
|
||||||
|
*/
|
||||||
|
static inline void Audio_Host_WriteSample24(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
|
||||||
|
const int32_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||||||
|
static inline void Audio_Host_WriteSample24(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
|
||||||
|
const int32_t Sample)
|
||||||
|
{
|
||||||
|
Pipe_Write_16_LE(Sample);
|
||||||
|
Pipe_Write_8(Sample >> 16);
|
||||||
|
|
||||||
|
if (Pipe_BytesInPipe() == AudioInterfaceInfo->State.DataINPipeSize)
|
||||||
|
Pipe_ClearOUT();
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Private Interface - For use in library only: */
|
||||||
|
#if !defined(__DOXYGEN__)
|
||||||
|
/* Function Prototypes: */
|
||||||
|
#if defined(__INCLUDE_FROM_AUDIO_HOST_C)
|
||||||
|
static uint8_t DComp_NextAudioControlInterface(void* CurrentDescriptor);
|
||||||
|
static uint8_t DComp_NextAudioStreamInterface(void* CurrentDescriptor);
|
||||||
|
static uint8_t DComp_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor);
|
||||||
|
#endif
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Disable C linkage for C++ Compilers: */
|
||||||
|
#if defined(__cplusplus)
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/** @} */
|
||||||
|
|
||||||
Loading…
Reference in new issue