Added new EVENT_Audio_StreamStartStopChange() event to the Audio Device Class driver to detect stream start/stop events.
Dean Camera
14 years ago
parent
605ef921cc
commit
e572ee7ff2
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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) |
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{ |
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(void)AudioInterfaceInfo; |
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} |
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/** Determines if the given audio interface is ready for a sample to be read from it, and selects the streaming
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* IN pipe ready for reading. |
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* |
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* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or |
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* the call will fail. |
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* |
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* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state. |
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* |
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* \return Boolean \c true if the given Audio interface has a sample to be read, \c false otherwise. |
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*/ |
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static inline bool Audio_Host_IsSampleReceived(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo) |
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ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline bool Audio_Host_IsSampleReceived(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo) |
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{ |
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if ((USB_HostState != HOST_STATE_Configured) || !(AudioInterfaceInfo->State.IsActive)) |
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return false; |
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Pipe_SelectPipe(AudioInterfaceInfo->Config.DataOUTPipeNumber); |
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return Pipe_IsINReceived(); |
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} |
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/** 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