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327 lines
14 KiB
327 lines
14 KiB
/* |
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LUFA Library |
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Copyright (C) Dean Camera, 2010. |
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dean [at] fourwalledcubicle [dot] com |
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www.fourwalledcubicle.com |
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*/ |
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/* |
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Copyright 2010 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 Device mode driver for the library USB Audio Class driver. |
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* |
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* Device 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 class driver |
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* dispatch header located in LUFA/Drivers/USB/Class/Audio.h. |
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*/ |
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/** \ingroup Group_USBClassAudio |
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* @defgroup Group_USBClassAudioDevice Audio Class Device 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/Device/Audio.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i> |
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* |
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* \section Module Description |
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* Device 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_DEVICE_H_ |
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#define _AUDIO_CLASS_DEVICE_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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#include <string.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/Class/Audio.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 Device Mode Configuration and State Structure. |
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* |
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* Class state structure. An instance of this structure should be made for each Audio interface |
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* within the user application, and passed to each of the Audio class driver functions as the |
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* AudioInterfaceInfo parameter. This 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 StreamingInterfaceNumber; /**< Index of the Audio Streaming interface within the device this |
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* structure controls. |
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*/ |
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uint8_t DataINEndpointNumber; /**< Endpoint number of the incoming Audio Streaming data, if available |
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* (zero if unused). |
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*/ |
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uint16_t DataINEndpointSize; /**< Size in bytes of the incoming Audio Streaming data endpoint, if available |
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* (zero if unused). |
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*/ |
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uint8_t DataOUTEndpointNumber; /**< Endpoint number of the outgoing Audio Streaming data, if available |
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* (zero if unused). |
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*/ |
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uint16_t DataOUTEndpointSize; /**< Size in bytes of the outgoing Audio Streaming data endpoint, if available |
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* (zero if unused). |
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*/ |
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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 InterfaceEnabled; /**< Set and cleared by the class driver to indicate if the host has enabled the streaming endpoints |
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* of the Audio Streaming interface. |
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*/ |
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} State; /**< State data for the USB class interface within the device. All elements in this section |
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* are reset to their defaults when the interface is enumerated. |
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*/ |
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} USB_ClassInfo_Audio_Device_t; |
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/* Function Prototypes: */ |
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/** Configures the endpoints of a given Audio interface, ready for use. This should be linked to the library |
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* \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing the |
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* given Audio interface is selected. |
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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 true if the endpoints were successfully configured, false otherwise. |
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*/ |
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bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); |
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/** Processes incoming control requests from the host, that are directed to the given Audio class interface. This should be |
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* linked to the library \ref EVENT_USB_Device_UnhandledControlRequest() event. |
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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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void Audio_Device_ProcessControlRequest(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); |
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/* Inline Functions: */ |
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/** General management task for a given Audio class interface, required for the correct operation of the interface. This should |
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* be called frequently in the main program loop, before the master USB management task \ref USB_USBTask(). |
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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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static inline void Audio_Device_USBTask(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline void Audio_Device_USBTask(USB_ClassInfo_Audio_Device_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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* OUT endpoint ready for reading. |
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* |
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* \pre This function must only be called when the Device state machine is in the DEVICE_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 true if the given Audio interface has a sample to be read, false otherwise. |
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*/ |
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static inline bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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{ |
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if ((USB_DeviceState != DEVICE_STATE_Configured) || !(AudioInterfaceInfo->State.InterfaceEnabled)) |
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return false; |
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Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber); |
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return Endpoint_IsOUTReceived(); |
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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 |
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* the streaming IN endpoint ready for writing. |
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* |
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* \pre This function must only be called when the Device state machine is in the DEVICE_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 true if the given Audio interface is ready to accept the next sample, false otherwise. |
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*/ |
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static inline bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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{ |
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if ((USB_DeviceState != DEVICE_STATE_Configured) || !(AudioInterfaceInfo->State.InterfaceEnabled)) |
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return false; |
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Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber); |
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return Endpoint_IsINReady(); |
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} |
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/** Reads the next 8-bit audio sample from the current audio interface. |
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* |
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* \pre This should be preceded immediately by a call to the \ref Audio_Device_IsSampleReceived() function to ensure |
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* ensure the correct endpoint is selected and ready for data. |
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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 Signed 8-bit audio sample from the audio interface. |
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*/ |
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static inline int8_t Audio_Device_ReadSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline int8_t Audio_Device_ReadSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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{ |
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int8_t Sample; |
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(void)AudioInterfaceInfo; |
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Sample = Endpoint_Read_Byte(); |
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if (!(Endpoint_BytesInEndpoint())) |
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Endpoint_ClearOUT(); |
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return Sample; |
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} |
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/** Reads the next 16-bit audio sample from the current audio interface. |
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* |
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* \pre This should be preceded immediately by a call to the \ref Audio_Device_IsSampleReceived() function to ensure |
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* that the correct endpoint is selected and ready for data. |
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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 Signed 16-bit audio sample from the audio interface. |
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*/ |
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static inline int16_t Audio_Device_ReadSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline int16_t Audio_Device_ReadSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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{ |
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int16_t Sample; |
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(void)AudioInterfaceInfo; |
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Sample = (int16_t)Endpoint_Read_Word_LE(); |
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if (!(Endpoint_BytesInEndpoint())) |
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Endpoint_ClearOUT(); |
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return Sample; |
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} |
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/** Reads the next 24-bit audio sample from the current audio interface. |
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* |
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* \pre This should be preceded immediately by a call to the \ref Audio_Device_IsSampleReceived() function to ensure |
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* that the correct endpoint is selected and ready for data. |
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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 Signed 24-bit audio sample from the audio interface. |
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*/ |
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static inline int32_t Audio_Device_ReadSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline int32_t Audio_Device_ReadSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) |
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{ |
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int32_t Sample; |
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(void)AudioInterfaceInfo; |
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Sample = (((uint32_t)Endpoint_Read_Byte() << 16) | Endpoint_Read_Word_LE()); |
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if (!(Endpoint_BytesInEndpoint())) |
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Endpoint_ClearOUT(); |
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return Sample; |
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} |
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/** Writes the next 8-bit audio sample to the current audio interface. |
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* |
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* \pre This should be preceded immediately by a call to the \ref Audio_Device_IsReadyForNextSample() function to |
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* ensure that the correct endpoint is selected and ready for data. |
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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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* \param[in] Sample Signed 8-bit audio sample. |
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*/ |
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static inline void Audio_Device_WriteSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, |
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const int8_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline void Audio_Device_WriteSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, |
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const int8_t Sample) |
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{ |
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Endpoint_Write_Byte(Sample); |
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if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize) |
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Endpoint_ClearIN(); |
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} |
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/** Writes the next 16-bit audio sample to the current audio interface. |
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* |
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* \pre This should be preceded immediately by a call to the \ref Audio_Device_IsReadyForNextSample() function to |
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* ensure that the correct endpoint is selected and ready for data. |
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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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* \param[in] Sample Signed 16-bit audio sample. |
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*/ |
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static inline void Audio_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, |
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const int16_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline void Audio_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, |
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const int16_t Sample) |
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{ |
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Endpoint_Write_Word_LE(Sample); |
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if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize) |
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Endpoint_ClearIN(); |
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} |
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/** Writes the next 24-bit audio sample to the current audio interface. |
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* |
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* \pre This should be preceded immediately by a call to the \ref Audio_Device_IsReadyForNextSample() function to |
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* ensure that the correct endpoint is selected and ready for data. |
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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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* \param[in] Sample Signed 24-bit audio sample. |
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*/ |
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static inline void Audio_Device_WriteSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, |
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const int32_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE; |
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static inline void Audio_Device_WriteSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, |
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const int32_t Sample) |
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{ |
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Endpoint_Write_Byte(Sample >> 16); |
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Endpoint_Write_Word_LE(Sample); |
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if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize) |
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Endpoint_ClearIN(); |
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} |
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/* Disable C linkage for C++ Compilers: */ |
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#if defined(__cplusplus) |
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} |
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#endif |
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#endif |
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/** @} */
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