Commit e572ee7f authored by Dean Camera's avatar Dean Camera
Browse files

Added new Host mode Audio Class driver.

Added new EVENT_Audio_StreamStartStopChange() event to the Audio Device Class driver to detect stream start/stop events.
parent 605ef921
This diff is collapsed.
......@@ -43,11 +43,12 @@
* \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>
* - LUFA/Drivers/USB/Class/Host/Audio.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
*
* \section Sec_ModDescription Module Description
* Audio Class Driver module. This module contains an internal implementation of the USB Audio 1.0 Class, for Device
* USB mode only. User applications can use this class driver instead of implementing the Audio class manually via
* the low-level LUFA APIs.
* Audio Class Driver module. This module contains an internal implementation of the USB Audio 1.0 Class, for both
* Device and Host USB modes. User applications can use this class driver instead of implementing the Audio class
* manually via the low-level LUFA APIs.
*
* This module is designed to simplify the user code by exposing only the required interface needed to interface with
* Hosts or Devices using the USB Audio Class.
......@@ -69,6 +70,10 @@
#include "Device/Audio.h"
#endif
#if defined(USB_CAN_BE_HOST)
#include "Host/Audio.h"
#endif
#endif
/** @} */
......
......@@ -70,6 +70,7 @@ void Audio_Device_ProcessControlRequest(USB_ClassInfo_Audio_Device_t* const Audi
Endpoint_ClearStatusStage();
AudioInterfaceInfo->State.InterfaceEnabled = ((USB_ControlRequest.wValue & 0xFF) != 0);
EVENT_Audio_StreamStartStopChange(AudioInterfaceInfo);
}
break;
......@@ -164,4 +165,9 @@ bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* const AudioIn
return true;
}
void Audio_Device_Event_Stub(void)
{
}
#endif
......@@ -101,9 +101,9 @@
*/
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.
*/
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.
*/
......@@ -160,6 +160,14 @@
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_StreamStartStopChange(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().
......@@ -348,6 +356,18 @@
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_StreamStartStopChange(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)
}
......
......@@ -177,7 +177,7 @@
/** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a
* control line state change (containing the virtual serial control line states, such as DTR) and may be hooked in the
* user program by declaring a handler function with the same name and parameters listed here. The new control line states
* are available in the ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as
* are available in the State.ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as
* a mask of CDC_CONTROL_LINE_OUT_* masks.
*
* \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
......
/*
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.
*/
#define __INCLUDE_FROM_USB_DRIVER
#include "../../Core/USBMode.h"
#if defined(USB_CAN_BE_HOST)
#define __INCLUDE_FROM_AUDIO_DRIVER
#define __INCLUDE_FROM_AUDIO_HOST_C
#include "Audio.h"
uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
uint16_t ConfigDescriptorSize,
void* ConfigDescriptorData)
{
USB_Descriptor_Endpoint_t* DataINEndpoint = NULL;
USB_Descriptor_Endpoint_t* DataOUTEndpoint = NULL;
USB_Descriptor_Interface_t* AudioControlInterface = NULL;
USB_Descriptor_Interface_t* AudioStreamingInterface = NULL;
memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));
if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
return AUDIO_ENUMERROR_InvalidConfigDescriptor;
while (!(DataINEndpoint) || !(DataOUTEndpoint))
{
if (!(AudioControlInterface) ||
USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
DComp_NextAudioInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
{
if (!(AudioControlInterface) ||
USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
{
if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
DComp_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
{
return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
}
AudioControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
DComp_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
{
return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
}
}
AudioStreamingInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
continue;
}
USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
DataINEndpoint = EndpointData;
else
DataOUTEndpoint = EndpointData;
}
for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
{
uint16_t Size;
uint8_t Type;
uint8_t Token;
uint8_t EndpointAddress;
bool DoubleBanked;
if (PipeNum == AudioInterfaceInfo->Config.DataINPipeNumber)
{
Size = DataINEndpoint->EndpointSize;
EndpointAddress = DataINEndpoint->EndpointAddress;
Token = PIPE_TOKEN_IN;
Type = EP_TYPE_BULK;
DoubleBanked = true;
AudioInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
}
else if (PipeNum == AudioInterfaceInfo->Config.DataOUTPipeNumber)
{
Size = DataOUTEndpoint->EndpointSize;
EndpointAddress = DataOUTEndpoint->EndpointAddress;
Token = PIPE_TOKEN_OUT;
Type = EP_TYPE_ISOCHRONOUS;
DoubleBanked = true;
AudioInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
}
else
{
continue;
}
if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
{
return AUDIO_ENUMERROR_PipeConfigurationFailed;
}
}
AudioInterfaceInfo->State.ControlInterfaceNumber = AudioControlInterface->InterfaceNumber;
AudioInterfaceInfo->State.StreamingInterfaceNumber = AudioStreamingInterface->InterfaceNumber;
AudioInterfaceInfo->State.EnabledStreamingAltIndex = AudioStreamingInterface->AlternateSetting;
AudioInterfaceInfo->State.IsActive = true;
return AUDIO_ENUMERROR_NoError;
}
static uint8_t DComp_NextAudioControlInterface(void* CurrentDescriptor)
{
USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
if (Header->Type == DTYPE_Interface)
{
USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
if ((Interface->Class == AUDIO_CSCP_AudioClass) &&
(Interface->SubClass == AUDIO_CSCP_ControlSubclass) &&
(Interface->Protocol == AUDIO_CSCP_ControlProtocol))
{
return DESCRIPTOR_SEARCH_Found;
}
}
return DESCRIPTOR_SEARCH_NotFound;
}
static uint8_t DComp_NextAudioStreamInterface(void* CurrentDescriptor)
{
USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
if (Header->Type == DTYPE_Interface)
{
USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
if ((Interface->Class == AUDIO_CSCP_AudioClass) &&
(Interface->SubClass == AUDIO_CSCP_AudioStreamingSubclass) &&
(Interface->Protocol == AUDIO_CSCP_StreamingProtocol))
{
return DESCRIPTOR_SEARCH_Found;
}
}
return DESCRIPTOR_SEARCH_NotFound;
}
static uint8_t DComp_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor)
{
USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
if (Header->Type == DTYPE_Endpoint)
{
USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);
if ((Endpoint->Attributes & EP_TYPE_MASK) == EP_TYPE_ISOCHRONOUS)
return DESCRIPTOR_SEARCH_Found;
}
else if (Header->Type == DTYPE_Interface)
{
return DESCRIPTOR_SEARCH_Fail;
}
return DESCRIPTOR_SEARCH_NotFound;
}
uint8_t AUDIO_Host_StartStopStreaming(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
bool EnableStreaming)
{
if (!(AudioInterfaceInfo->State.IsActive))
return HOST_SENDCONTROL_DeviceDisconnected;
return USB_Host_SetInterfaceAltSetting(AudioInterfaceInfo->State.StreamingInterfaceNumber,
EnableStreaming ? AudioInterfaceInfo->State.EnabledStreamingAltIndex : 0);
}
#endif
/*
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 Class driver.
*
* Host mode driver for the library USB Audio 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 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 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. */
uint8_t DataOUTPipeNumber; /**< Pipe number of the Audio interface's OUT data pipe. */
} 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.
*
* \note The pipe index numbers as given in the interface's configuration structure must not overlap with any other
* interface, or pipe bank corruption will occur. Gaps in the allocated pipe numbers or non-sequential indexes
* within a single interface is allowed, but no two interfaces of any type have have interleaved pipe indexes.
* \n\n
*
* \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,
bool EnableStreaming);
/* 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);
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;
Pipe_SelectPipe(AudioInterfaceInfo->Config.DataOUTPipeNumber);
return Pipe_IsINReceived();
}
/** 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.DataINPipeNumber);
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_ClearIN();
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_ClearIN();
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_ClearIN();
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)
{
Pipe_Write_8(Sample);
if (Pipe_BytesInPipe() == AudioInterfaceInfo->State.DataINPipeSize)
Pipe_ClearOUT();
}
/** 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;