+++ /dev/null
-/*
- LUFA Library
- Copyright (C) Dean Camera, 2011.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
-*/
-
-/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- * \brief Device mode driver for the library USB Audio 1.0 Class driver.
- *
- * Device mode driver for the library USB Audio 1.0 Class driver.
- *
- * \note This file should not be included directly. It is automatically included as needed by the USB module driver
- * dispatch header located in LUFA/Drivers/USB.h.
- */
-
-/** \ingroup Group_USBClassAudio
- * \defgroup Group_USBClassAudioDevice Audio 1.0 Class Device Mode Driver
- *
- * \section Sec_Dependencies Module Source Dependencies
- * The following files must be built with any user project that uses this module:
- * - LUFA/Drivers/USB/Class/Device/Audio.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
- *
- * \section Sec_ModDescription Module Description
- * Device Mode USB Class driver framework interface, for the Audio 1.0 USB Class driver.
- *
- * @{
- */
-
-#ifndef _AUDIO_CLASS_DEVICE_H_
-#define _AUDIO_CLASS_DEVICE_H_
-
- /* Includes: */
- #include "../../USB.h"
- #include "../Common/Audio.h"
-
- /* Enable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
- /* Preprocessor Checks: */
- #if !defined(__INCLUDE_FROM_AUDIO_DRIVER)
- #error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Type Defines: */
- /** \brief Audio Class Device Mode Configuration and State Structure.
- *
- * Class state structure. An instance of this structure should be made for each Audio interface
- * within the user application, and passed to each of the Audio class driver functions as the
- * \c AudioInterfaceInfo parameter. This stores each Audio interface's configuration and state information.
- */
- typedef struct
- {
- const struct
- {
- uint8_t StreamingInterfaceNumber; /**< Index of the Audio Streaming interface within the device this
- * structure controls.
- */
-
- uint8_t DataINEndpointNumber; /**< Endpoint number of the incoming Audio Streaming data, if available
- * (zero if unused).
- */
- uint16_t DataINEndpointSize; /**< Size in bytes of the incoming Audio Streaming data endpoint, if available
- * (zero if unused).
- */
-
- uint8_t DataOUTEndpointNumber; /**< Endpoint number of the outgoing Audio Streaming data, if available
- * (zero if unused).
- */
- uint16_t DataOUTEndpointSize; /**< Size in bytes of the outgoing Audio Streaming data endpoint, if available
- * (zero if unused).
- */
- } Config; /**< Config data for the USB class interface within the device. All elements in this section
- * <b>must</b> be set or the interface will fail to enumerate and operate correctly.
- */
- struct
- {
- bool InterfaceEnabled; /**< Set and cleared by the class driver to indicate if the host has enabled the streaming endpoints
- * of the Audio Streaming interface.
- */
- } State; /**< State data for the USB class interface within the device. All elements in this section
- * are reset to their defaults when the interface is enumerated.
- */
- } USB_ClassInfo_Audio_Device_t;
-
- /* Function Prototypes: */
- /** Configures the endpoints of a given Audio interface, ready for use. This should be linked to the library
- * \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing the
- * given Audio interface is selected.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- *
- * \return Boolean \c true if the endpoints were successfully configured, \c false otherwise.
- */
- bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Processes incoming control requests from the host, that are directed to the given Audio class interface. This should be
- * linked to the library \ref EVENT_USB_Device_ControlRequest() event.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- */
- void Audio_Device_ProcessControlRequest(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Audio class driver callback for the setting and retrieval of streaming endpoint properties. This callback must be implemented
- * in the user application to handle property manipulations on streaming audio endpoints.
- *
- * When the DataLength parameter is NULL, this callback should only indicate whether the specified operation is valid for
- * the given endpoint index, and should return as fast as possible. When non-NULL, this value may be altered for GET operations
- * to indicate the size of the retreived data.
- *
- * \note The length of the retrieved data stored into the Data buffer on GET operations should not exceed the initial value
- * of the \c DataLength parameter.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- * \param[in] EndpointProperty Property of the endpoint to get or set, a value from \ref Audio_ClassRequests_t.
- * \param[in] EndpointAddress Address of the streaming endpoint whose property is being referenced.
- * \param[in] EndpointControl Parameter of the endpoint to get or set, a value from \ref Audio_EndpointControls_t.
- * \param[in,out] DataLength For SET operations, the length of the parameter data to set. For GET operations, the maximum
- * length of the retrieved data. When NULL, the function should return whether the given property
- * and parameter is valid for the requested endpoint without reading or modifying the Data buffer.
- * \param[in,out] Data Pointer to a location where the parameter data is stored for SET operations, or where
- * the retrieved data is to be stored for GET operations.
- *
- * \return Boolean true if the property get/set was successful, false otherwise
- */
- bool CALLBACK_Audio_Device_GetSetEndpointProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
- const uint8_t EndpointProperty,
- const uint8_t EndpointAddress,
- const uint8_t EndpointControl,
- uint16_t* const DataLength,
- uint8_t* Data);
-
- /** Audio class driver event for an Audio Stream start/stop change. This event fires each time the device receives a stream enable or
- * disable control request from the host, to start and stop the audio stream. The current state of the stream can be determined by the
- * State.InterfaceEnabled value inside the Audio interface structure passed as a parameter.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- */
- void EVENT_Audio_Device_StreamStartStop(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo);
-
- /* Inline Functions: */
- /** General management task for a given Audio class interface, required for the correct operation of the interface. This should
- * be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- */
- static inline void Audio_Device_USBTask(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline void Audio_Device_USBTask(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- {
- (void)AudioInterfaceInfo;
- }
-
- /** Determines if the given audio interface is ready for a sample to be read from it, and selects the streaming
- * OUT endpoint ready for reading.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- *
- * \return Boolean \c true if the given Audio interface has a sample to be read, \c false otherwise.
- */
- static inline bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- {
- if ((USB_DeviceState != DEVICE_STATE_Configured) || !(AudioInterfaceInfo->State.InterfaceEnabled))
- return false;
-
- Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber);
- return Endpoint_IsOUTReceived();
- }
-
- /** Determines if the given audio interface is ready to accept the next sample to be written to it, and selects
- * the streaming IN endpoint ready for writing.
- *
- * \pre This function must only be called when the Device state machine is in the \ref DEVICE_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_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- {
- if ((USB_DeviceState != DEVICE_STATE_Configured) || !(AudioInterfaceInfo->State.InterfaceEnabled))
- return false;
-
- Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber);
- return Endpoint_IsINReady();
- }
-
- /** 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_Device_IsSampleReceived() 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.
- *
- * \return Signed 8-bit audio sample from the audio interface.
- */
- static inline int8_t Audio_Device_ReadSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline int8_t Audio_Device_ReadSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- {
- int8_t Sample;
-
- (void)AudioInterfaceInfo;
-
- Sample = Endpoint_Read_8();
-
- if (!(Endpoint_BytesInEndpoint()))
- Endpoint_ClearOUT();
-
- 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_Device_IsSampleReceived() 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.
- *
- * \return Signed 16-bit audio sample from the audio interface.
- */
- static inline int16_t Audio_Device_ReadSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline int16_t Audio_Device_ReadSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- {
- int16_t Sample;
-
- (void)AudioInterfaceInfo;
-
- Sample = (int16_t)Endpoint_Read_16_LE();
-
- if (!(Endpoint_BytesInEndpoint()))
- Endpoint_ClearOUT();
-
- 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_Device_IsSampleReceived() 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.
- *
- * \return Signed 24-bit audio sample from the audio interface.
- */
- static inline int32_t Audio_Device_ReadSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline int32_t Audio_Device_ReadSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
- {
- int32_t Sample;
-
- (void)AudioInterfaceInfo;
-
- Sample = (((uint32_t)Endpoint_Read_8() << 16) | Endpoint_Read_16_LE());
-
- if (!(Endpoint_BytesInEndpoint()))
- Endpoint_ClearOUT();
-
- 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_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 8-bit audio sample.
- */
- static inline void Audio_Device_WriteSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
- const int8_t Sample) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline void Audio_Device_WriteSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
- const int8_t Sample)
- {
- Endpoint_Write_8(Sample);
-
- if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)
- 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.DataINEndpointSize)
- 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.DataINEndpointSize)
- 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
-
-/** @} */
-
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