411 lines
		
	
	
	
		
			18 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			411 lines
		
	
	
	
		
			18 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /*
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|              LUFA Library
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|      Copyright (C) Dean Camera, 2017.
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| 
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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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| /*
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|   Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
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| 
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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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| 
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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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| 
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| /** \file
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|  *  \brief Host mode driver for the library USB Audio 1.0 Class driver.
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|  *
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|  *  Host 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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| 
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| /** \ingroup Group_USBClassAudio
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|  *  \defgroup Group_USBClassAudioHost Audio 1.0 Class Host Mode Driver
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|  *
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|  *  \section Sec_USBClassAudioHost_Dependencies Module Source Dependencies
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|  *  The following files must be built with any user project that uses this module:
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|  *    - LUFA/Drivers/USB/Class/Host/AudioClassHost.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
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|  *
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|  *  \section Sec_USBClassAudioHost_ModDescription Module Description
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|  *  Host 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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| 
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| #ifndef __AUDIO_CLASS_HOST_H__
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| #define __AUDIO_CLASS_HOST_H__
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| 
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| 	/* Includes: */
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| 		#include "../../USB.h"
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| 		#include "../Common/AudioClassCommon.h"
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| 
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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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| 
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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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| 
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| 	/* Public Interface - May be used in end-application: */
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| 		/* Type Defines: */
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| 			/** \brief Audio Class Host Mode Configuration and State Structure.
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| 			 *
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| 			 *  Class state structure. An instance of this structure should be made within the user application,
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| 			 *  and passed to each of the Audio class driver functions as the \c AudioInterfaceInfo parameter. This
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| 			 *  stores each Audio interface's configuration and state information.
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| 			 */
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| 			typedef struct
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| 			{
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| 				struct
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| 				{
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| 					USB_Pipe_Table_t DataINPipe; /**< Data IN Pipe configuration table. */
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| 					USB_Pipe_Table_t DataOUTPipe; /**< Data OUT Pipe 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 IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
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| 					                *   after \ref Audio_Host_ConfigurePipes() is called and the Host state machine is in the
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| 					                *   Configured state.
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| 					                */
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| 					uint8_t ControlInterfaceNumber; /**< Interface index of the Audio Control interface within the attached device. */
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| 					uint8_t StreamingInterfaceNumber; /**< Interface index of the Audio Streaming interface within the attached device. */
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| 
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| 					uint8_t EnabledStreamingAltIndex; /**< Alternative setting index of the Audio Streaming interface when the stream is enabled. */
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| 				} State; /**< State data for the USB class interface within the device. All elements in this section
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| 						  *   <b>may</b> be set to initial values, but may also be ignored to default to sane values when
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| 						  *   the interface is enumerated.
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| 						  */
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| 			} USB_ClassInfo_Audio_Host_t;
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| 
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| 		/* Enums: */
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| 			/** Enum for the possible error codes returned by the \ref Audio_Host_ConfigurePipes() function. */
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| 			enum AUDIO_Host_EnumerationFailure_ErrorCodes_t
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| 			{
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| 				AUDIO_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
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| 				AUDIO_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
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| 				AUDIO_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible AUDIO interface was not found in the device's Configuration Descriptor. */
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| 				AUDIO_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
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| 			};
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| 
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| 		/* Function Prototypes: */
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| 			/** Host interface configuration routine, to configure a given Audio host interface instance using the Configuration
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| 			 *  Descriptor read from an attached USB device. This function automatically updates the given Audio Host instance's
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| 			 *  state values and configures the pipes required to communicate with the interface if it is found within the
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| 			 *  device. This should be called once after the stack has enumerated the attached device, while the host state
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| 			 *  machine is in the Addressed state.
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| 			 *
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| 			 *  \param[in,out] AudioInterfaceInfo    Pointer to a structure containing an Audio Class host configuration and state.
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| 			 *  \param[in]     ConfigDescriptorSize  Length of the attached device's Configuration Descriptor.
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| 			 *  \param[in]     ConfigDescriptorData  Pointer to a buffer containing the attached device's Configuration Descriptor.
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| 			 *
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| 			 *  \return A value from the \ref AUDIO_Host_EnumerationFailure_ErrorCodes_t enum.
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| 			 */
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| 			uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
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| 			                                  uint16_t ConfigDescriptorSize,
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| 			                                  void* ConfigDescriptorData) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
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| 
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| 			/** Starts or stops the audio streaming for the given configured Audio Host interface, allowing for audio samples to be
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| 			 *  send and/or received.
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| 			 *
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| 			 *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class host configuration and state.
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| 			 *  \param[in]     EnableStreaming     Boolean true to enable streaming of the specified interface, \c false to disable
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| 			 *
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| 			 *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
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| 			 */
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| 			uint8_t Audio_Host_StartStopStreaming(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
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| 			                                      const bool EnableStreaming) ATTR_NON_NULL_PTR_ARG(1);
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| 
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| 			/** Gets or sets the specified property of a streaming audio class endpoint that is bound to a pipe in the given
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| 			 *  class instance.
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| 			 *
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| 			 *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class host configuration and state.
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| 			 *  \param[in]     DataPipeIndex       Index of the data pipe whose bound endpoint is to be altered.
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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]     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.
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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 A value from the \ref USB_Host_SendControlErrorCodes_t enum.
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| 			 */
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| 			uint8_t Audio_Host_GetSetEndpointProperty(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
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| 			                                          const uint8_t DataPipeIndex,
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| 			                                          const uint8_t EndpointProperty,
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| 			                                          const uint8_t EndpointControl,
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| 			                                          const uint16_t DataLength,
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| 			                                          void* const Data) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(6);
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| 
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| 		/* Inline Functions: */
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| 			/** General management task for a given Audio host class interface, required for the correct operation of
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| 			 *  the interface. This should be called frequently in the main program loop, before the master USB management task
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| 			 *  \ref USB_USBTask().
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| 			 *
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| 			 *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class host configuration and state.
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| 			 */
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| 			static inline void Audio_Host_USBTask(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			                                      ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
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| 			static inline void Audio_Host_USBTask(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			{
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| 				(void)AudioInterfaceInfo;
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| 			}
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| 
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| 			/** Determines if the given audio interface is ready for a sample to be read from it, and selects the streaming
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| 			 *  IN pipe ready for reading.
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| 			 *
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| 			 *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or
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| 			 *       the call will fail.
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| 			 *
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| 			 *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state.
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| 			 *
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| 			 *  \return Boolean \c true if the given Audio interface has a sample to be read, \c false otherwise.
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| 			 */
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| 			static inline bool Audio_Host_IsSampleReceived(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			                                               ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
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| 			static inline bool Audio_Host_IsSampleReceived(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			{
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| 				if ((USB_HostState != HOST_STATE_Configured) || !(AudioInterfaceInfo->State.IsActive))
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| 				  return false;
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| 
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| 				bool SampleReceived = false;
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| 
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| 				Pipe_SelectPipe(AudioInterfaceInfo->Config.DataINPipe.Address);
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| 				Pipe_Unfreeze();
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| 				SampleReceived = Pipe_IsINReceived();
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| 				Pipe_Freeze();
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| 
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| 				return SampleReceived;
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| 			}
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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 OUT pipe ready for writing.
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| 			 *
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| 			 *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or
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| 			 *       the call will fail.
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| 			 *
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| 			 *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state.
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| 			 *
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| 			 *  \return Boolean \c true if the given Audio interface is ready to accept the next sample, \c false otherwise.
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| 			 */
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| 			static inline bool Audio_Host_IsReadyForNextSample(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			                                                   ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
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| 			static inline bool Audio_Host_IsReadyForNextSample(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			{
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| 				if ((USB_HostState != HOST_STATE_Configured) || !(AudioInterfaceInfo->State.IsActive))
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| 				  return false;
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| 
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| 				Pipe_SelectPipe(AudioInterfaceInfo->Config.DataOUTPipe.Address);
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| 				return Pipe_IsOUTReady();
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| 			}
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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_Host_IsSampleReceived() function to ensure
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| 			 *       that the correct pipe 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_Host_ReadSample8(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			                                            ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
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| 			static inline int8_t Audio_Host_ReadSample8(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			{
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| 				int8_t Sample;
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| 
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| 				(void)AudioInterfaceInfo;
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| 
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| 				Sample = Pipe_Read_8();
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| 
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| 				if (!(Pipe_BytesInPipe()))
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| 				{
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| 					Pipe_Unfreeze();
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| 					Pipe_ClearIN();
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| 					Pipe_Freeze();
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| 				}
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| 
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| 				return Sample;
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| 			}
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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_Host_IsSampleReceived() function to ensure
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| 			 *       that the correct pipe 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_Host_ReadSample16(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			                                              ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
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| 			static inline int16_t Audio_Host_ReadSample16(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			{
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| 				int16_t Sample;
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| 
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| 				(void)AudioInterfaceInfo;
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| 
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| 				Sample = (int16_t)Pipe_Read_16_LE();
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| 
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| 				if (!(Pipe_BytesInPipe()))
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| 				{
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| 					Pipe_Unfreeze();
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| 					Pipe_ClearIN();
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| 					Pipe_Freeze();
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| 				}
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| 
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| 				return Sample;
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| 			}
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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_Host_IsSampleReceived() function to ensure
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| 			 *       that the correct pipe 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_Host_ReadSample24(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			                                              ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
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| 			static inline int32_t Audio_Host_ReadSample24(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo)
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| 			{
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| 				int32_t Sample;
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| 
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| 				(void)AudioInterfaceInfo;
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| 
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| 				Sample = (((uint32_t)Pipe_Read_8() << 16) | Pipe_Read_16_LE());
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| 
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| 				if (!(Pipe_BytesInPipe()))
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| 				{
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| 					Pipe_Unfreeze();
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| 					Pipe_ClearIN();
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| 					Pipe_Freeze();
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| 				}
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| 
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| 				return Sample;
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| 			}
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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_Host_IsReadyForNextSample() function to
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| 			 *       ensure that the correct pipe 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_Host_WriteSample8(USB_ClassInfo_Audio_Host_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_Host_WriteSample8(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
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| 			                                           const int8_t Sample)
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| 			{
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| 				(void)AudioInterfaceInfo;
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| 
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| 				Pipe_Write_8(Sample);
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| 
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| 				if (!(Pipe_IsReadWriteAllowed()))
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| 				{
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| 					Pipe_Unfreeze();
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| 					Pipe_ClearOUT();
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| 					Pipe_WaitUntilReady();
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| 					Pipe_Freeze();
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| 				}
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| 			}
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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_Host_IsReadyForNextSample() function to
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| 			 *       ensure that the correct pipe 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_Host_WriteSample16(USB_ClassInfo_Audio_Host_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_Host_WriteSample16(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
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| 			                                            const int16_t Sample)
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| 			{
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| 				(void)AudioInterfaceInfo;
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| 
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| 				Pipe_Write_16_LE(Sample);
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| 
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| 				if (!(Pipe_IsReadWriteAllowed()))
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| 				{
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| 					Pipe_Unfreeze();
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| 					Pipe_ClearOUT();
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| 					Pipe_WaitUntilReady();
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| 					Pipe_Freeze();
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| 				}
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| 			}
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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_Host_IsReadyForNextSample() function to
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| 			 *       ensure that the correct pipe 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_Host_WriteSample24(USB_ClassInfo_Audio_Host_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_Host_WriteSample24(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
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| 			                                            const int32_t Sample)
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| 			{
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| 				(void)AudioInterfaceInfo;
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| 
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| 				Pipe_Write_16_LE(Sample);
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| 				Pipe_Write_8(Sample >> 16);
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| 
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| 				if (!(Pipe_IsReadWriteAllowed()))
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| 				{
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| 					Pipe_Unfreeze();
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| 					Pipe_ClearOUT();
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| 					Pipe_WaitUntilReady();
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| 					Pipe_Freeze();
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| 				}
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| 			}
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| 
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| 	/* Private Interface - For use in library only: */
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| 	#if !defined(__DOXYGEN__)
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| 		/* Function Prototypes: */
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| 			#if defined(__INCLUDE_FROM_AUDIO_HOST_C)
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| 				static uint8_t DCOMP_Audio_Host_NextAudioControlInterface(void* CurrentDescriptor)
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| 				                                                          ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
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| 				static uint8_t DCOMP_Audio_Host_NextAudioStreamInterface(void* CurrentDescriptor)
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| 				                                                         ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
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| 				static uint8_t DCOMP_Audio_Host_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor)
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| 				                                                               ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
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| 			#endif
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| 	#endif
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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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| 
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| #endif
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| 
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| /** @} */
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| 
 | 
