mirror of
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397 lines
20 KiB
C
397 lines
20 KiB
C
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2017.
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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 2017 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 disclaims 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 1.0 Class driver.
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*
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* Device mode driver for the library USB Audio 1.0 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_USBClassAudioDevice Audio 1.0 Class Device Mode Driver
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*
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* \section Sec_USBClassAudioDevice_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/AudioClassDevice.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
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*
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* \section Sec_USBClassAudioDevice_ModDescription Module Description
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* Device Mode USB Class driver framework interface, for the Audio 1.0 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/AudioClassCommon.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 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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* \c 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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struct
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{
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uint8_t ControlInterfaceNumber; /**< Index of the Audio Control interface within the device this
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* structure controls.
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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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USB_Endpoint_Table_t DataINEndpoint; /**< Data IN endpoint configuration table. */
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USB_Endpoint_Table_t DataOUTEndpoint; /**< Data OUT endpoint configuration table. */
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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 \c true if the endpoints were successfully configured, \c 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_ControlRequest() 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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/** Audio class driver callback for the setting and retrieval of streaming endpoint properties. This callback must be implemented
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* in the user application to handle property manipulations on streaming audio endpoints.
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*
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* When the DataLength parameter is NULL, this callback should only indicate whether the specified operation is valid for
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* the given endpoint index, and should return as fast as possible. When non-NULL, this value may be altered for GET operations
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* to indicate the size of the retrieved data.
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*
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* \note The length of the retrieved data stored into the Data buffer on GET operations should not exceed the initial value
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* of the \c DataLength parameter.
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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] EndpointProperty Property of the endpoint to get or set, a value from \ref Audio_ClassRequests_t.
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* \param[in] EndpointAddress Address of the streaming endpoint whose property is being referenced.
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* \param[in] EndpointControl Parameter of the endpoint to get or set, a value from \ref Audio_EndpointControls_t.
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* \param[in,out] DataLength For SET operations, the length of the parameter data to set. For GET operations, the maximum
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* length of the retrieved data. When NULL, the function should return whether the given property
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* and parameter is valid for the requested endpoint without reading or modifying the Data buffer.
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* \param[in,out] Data Pointer to a location where the parameter data is stored for SET operations, or where
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* the retrieved data is to be stored for GET operations.
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*
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* \return Boolean \c true if the property GET/SET was successful, \c false otherwise
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*/
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bool CALLBACK_Audio_Device_GetSetEndpointProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
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const uint8_t EndpointProperty,
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const uint8_t EndpointAddress,
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const uint8_t EndpointControl,
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uint16_t* const DataLength,
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uint8_t* Data) ATTR_NON_NULL_PTR_ARG(1);
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/** Audio class driver callback for the setting and retrieval of streaming interface properties. This callback must be implemented
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* in the user application to handle property manipulations on streaming audio interfaces.
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*
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* When the DataLength parameter is NULL, this callback should only indicate whether the specified operation is valid for
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* the given entity and should return as fast as possible. When non-NULL, this value may be altered for GET operations
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* to indicate the size of the retrieved data.
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*
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* \note The length of the retrieved data stored into the Data buffer on GET operations should not exceed the initial value
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* of the \c DataLength parameter.
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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] Property Property of the interface to get or set, a value from \ref Audio_ClassRequests_t.
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* \param[in] EntityAddress Address of the audio entity whose property is being referenced.
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* \param[in] Parameter Parameter of the entity to get or set, specific to each type of entity (see USB Audio specification).
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* \param[in,out] DataLength For SET operations, the length of the parameter data to set. For GET operations, the maximum
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* length of the retrieved data. When NULL, the function should return whether the given property
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* and parameter is valid for the requested endpoint without reading or modifying the Data buffer.
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* \param[in,out] Data Pointer to a location where the parameter data is stored for SET operations, or where
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* the retrieved data is to be stored for GET operations.
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*
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* \return Boolean \c true if the property GET/SET was successful, \c false otherwise
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*/
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bool CALLBACK_Audio_Device_GetSetInterfaceProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
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const uint8_t Property,
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const uint8_t EntityAddress,
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const uint16_t Parameter,
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uint16_t* const DataLength,
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uint8_t* Data) ATTR_NON_NULL_PTR_ARG(1);
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/** Audio class driver event for an Audio Stream start/stop change. This event fires each time the device receives a stream enable or
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* disable control request from the host, to start and stop the audio stream. The current state of the stream can be determined by the
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* State.InterfaceEnabled value inside the Audio interface structure passed as a parameter.
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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 EVENT_Audio_Device_StreamStartStop(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo);
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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 \ref 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 \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_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.DataOUTEndpoint.Address);
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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 \ref 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 \c true if the given Audio interface is ready to accept the next sample, \c 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.DataINEndpoint.Address);
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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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* 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 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_8();
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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_16_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_8() << 16) | Endpoint_Read_16_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)
|
||
|
|
{
|
||
|
|
Endpoint_Write_8(Sample);
|
||
|
|
|
||
|
|
if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpoint.Size)
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** 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_Device_IsReadyForNextSample() function to
|
||
|
|
* ensure that the correct endpoint 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_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
|
||
|
|
const int16_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||
|
|
static inline void Audio_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
|
||
|
|
const int16_t Sample)
|
||
|
|
{
|
||
|
|
Endpoint_Write_16_LE(Sample);
|
||
|
|
|
||
|
|
if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpoint.Size)
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** 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_Device_IsReadyForNextSample() function to
|
||
|
|
* ensure that the correct endpoint 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_Device_WriteSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
|
||
|
|
const int32_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
|
||
|
|
static inline void Audio_Device_WriteSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
|
||
|
|
const int32_t Sample)
|
||
|
|
{
|
||
|
|
Endpoint_Write_16_LE(Sample);
|
||
|
|
Endpoint_Write_8(Sample >> 16);
|
||
|
|
|
||
|
|
if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpoint.Size)
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Private Interface - For use in library only: */
|
||
|
|
#if !defined(__DOXYGEN__)
|
||
|
|
/* Function Prototypes: */
|
||
|
|
#if defined(__INCLUDE_FROM_AUDIO_DEVICE_C)
|
||
|
|
void Audio_Device_Event_Stub(void) ATTR_CONST;
|
||
|
|
|
||
|
|
void EVENT_Audio_Device_StreamStartStop(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
|
||
|
|
ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(Audio_Device_Event_Stub);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Disable C linkage for C++ Compilers: */
|
||
|
|
#if defined(__cplusplus)
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** @} */
|
||
|
|
|