+++ /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 Host mode driver for the library USB Audio 1.0 Class driver.
- *
- * Host 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_USBClassAudioHost Audio 1.0 Class Host 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/Host/Audio.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
- *
- * \section Sec_ModDescription Module Description
- * Host Mode USB Class driver framework interface, for the Audio 1.0 USB Class driver.
- *
- * @{
- */
-
-#ifndef __AUDIO_CLASS_HOST_H__
-#define __AUDIO_CLASS_HOST_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 Host Mode Configuration and State Structure.
- *
- * Class state structure. An instance of this structure should be made 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 DataINPipeNumber; /**< Pipe number of the Audio interface's IN data pipe. If this interface should not
- * bind to an IN endpoint, this may be set to 0 to disable audio input streaming for
- * this driver instance.
- */
- uint8_t DataOUTPipeNumber; /**< Pipe number of the Audio interface's OUT data pipe. If this interface should not
- * bind to an OUT endpoint, this may be set to 0 to disable audio output streaming for
- * this driver instance.
- */
- } 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 IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
- * after \ref Audio_Host_ConfigurePipes() is called and the Host state machine is in the
- * Configured state.
- */
- uint8_t ControlInterfaceNumber; /**< Interface index of the Audio Control interface within the attached device. */
- uint8_t StreamingInterfaceNumber; /**< Interface index of the Audio Streaming interface within the attached device. */
-
- uint8_t EnabledStreamingAltIndex; /**< Alternative setting index of the Audio Streaming interface when the stream is enabled. */
-
- uint16_t DataINPipeSize; /**< Size in bytes of the Audio interface's IN data pipe. */
- uint16_t DataOUTPipeSize; /**< Size in bytes of the Audio interface's OUT data pipe. */
- } State; /**< State data for the USB class interface within the device. All elements in this section
- * <b>may</b> be set to initial values, but may also be ignored to default to sane values when
- * the interface is enumerated.
- */
- } USB_ClassInfo_Audio_Host_t;
-
- /* Enums: */
- /** Enum for the possible error codes returned by the \ref Audio_Host_ConfigurePipes() function. */
- enum AUDIO_Host_EnumerationFailure_ErrorCodes_t
- {
- AUDIO_ENUMERROR_NoError = 0, /**< Configuration Descriptor was processed successfully. */
- AUDIO_ENUMERROR_InvalidConfigDescriptor = 1, /**< The device returned an invalid Configuration Descriptor. */
- AUDIO_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible AUDIO interface was not found in the device's Configuration Descriptor. */
- AUDIO_ENUMERROR_PipeConfigurationFailed = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
- };
-
- /* Function Prototypes: */
- /** Host interface configuration routine, to configure a given Audio host interface instance using the Configuration
- * Descriptor read from an attached USB device. This function automatically updates the given Audio Host instance's
- * state values and configures the pipes required to communicate with the interface if it is found within the
- * device. This should be called once after the stack has enumerated the attached device, while the host state
- * machine is in the Addressed state.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class host configuration and state.
- * \param[in] ConfigDescriptorSize Length of the attached device's Configuration Descriptor.
- * \param[in] DeviceConfigDescriptor Pointer to a buffer containing the attached device's Configuration Descriptor.
- *
- * \return A value from the \ref AUDIO_Host_EnumerationFailure_ErrorCodes_t enum.
- */
- uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
- uint16_t ConfigDescriptorSize,
- void* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
-
- /** Starts or stops the audio streaming for the given configured Audio Host interface, allowing for audio samples to be
- * send and/or received.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class host configuration and state.
- * \param[in] EnableStreaming Boolean true to enable streaming of the specified interface, false to disable
- *
- * \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
- */
- uint8_t Audio_Host_StartStopStreaming(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
- const bool EnableStreaming) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Gets or sets the specified property of a streaming audio class endpoint that is bound to a pipe in the given
- * class instance.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class host configuration and state.
- * \param[in] DataPipeIndex Index of the data pipe whose bound endpoint is to be altered.
- * \param[in] EndpointProperty Property of the endpoint to get or set, a value from \ref Audio_ClassRequests_t.
- * \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.
- * \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 A value from the \ref USB_Host_SendControlErrorCodes_t enum.
- */
- uint8_t Audio_Host_GetSetEndpointProperty(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
- const uint8_t DataPipeIndex,
- const uint8_t EndpointProperty,
- const uint8_t EndpointControl,
- const uint16_t DataLength,
- void* const Data) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(6);
-
- /* Inline Functions: */
- /** General management task for a given Audio host 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 host configuration and state.
- */
- static inline void Audio_Host_USBTask(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline void Audio_Host_USBTask(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
- {
- (void)AudioInterfaceInfo;
- }
-
- /** Determines if the given audio interface is ready for a sample to be read from it, and selects the streaming
- * IN pipe ready for reading.
- *
- * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- *
- * \return Boolean \c true if the given Audio interface has a sample to be read, \c false otherwise.
- */
- static inline bool Audio_Host_IsSampleReceived(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
- static inline bool Audio_Host_IsSampleReceived(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
- {
- if ((USB_HostState != HOST_STATE_Configured) || !(AudioInterfaceInfo->State.IsActive))
- return false;
-
- bool SampleReceived = false;
-
- Pipe_SelectPipe(AudioInterfaceInfo->Config.DataINPipeNumber);
- Pipe_Unfreeze();
- SampleReceived = Pipe_IsINReceived();
- Pipe_Freeze();
-
- return SampleReceived;
- }
-
- /** 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.DataOUTPipeNumber);
- 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_Unfreeze();
- Pipe_ClearIN();
- Pipe_Freeze();
- }
-
- 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_Unfreeze();
- Pipe_ClearIN();
- Pipe_Freeze();
- }
-
- 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_Unfreeze();
- Pipe_ClearIN();
- Pipe_Freeze();
- }
-
- 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)
- {
- (void)AudioInterfaceInfo;
-
- Pipe_Write_8(Sample);
-
- if (!(Pipe_IsReadWriteAllowed()))
- {
- Pipe_Unfreeze();
- Pipe_ClearOUT();
- Pipe_WaitUntilReady();
- Pipe_Freeze();
- }
- }
-
- /** 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)
- {
- (void)AudioInterfaceInfo;
-
- Pipe_Write_16_LE(Sample);
-
- if (!(Pipe_IsReadWriteAllowed()))
- {
- Pipe_Unfreeze();
- Pipe_ClearOUT();
- Pipe_WaitUntilReady();
- Pipe_Freeze();
- }
- }
-
- /** 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)
- {
- (void)AudioInterfaceInfo;
-
- Pipe_Write_16_LE(Sample);
- Pipe_Write_8(Sample >> 16);
-
- if (!(Pipe_IsReadWriteAllowed()))
- {
- Pipe_Unfreeze();
- Pipe_ClearOUT();
- Pipe_WaitUntilReady();
- Pipe_Freeze();
- }
- }
-
- /* Private Interface - For use in library only: */
- #if !defined(__DOXYGEN__)
- /* Function Prototypes: */
- #if defined(__INCLUDE_FROM_AUDIO_HOST_C)
- static uint8_t DCOMP_Audio_Host_NextAudioControlInterface(void* CurrentDescriptor)
- ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
- static uint8_t DCOMP_Audio_Host_NextAudioStreamInterface(void* CurrentDescriptor)
- ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
- static uint8_t DCOMP_Audio_Host_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor)
- ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
- #endif
- #endif
-
- /* Disable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- }
- #endif
-
-#endif
-
-/** @} */
-
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