/*
LUFA Library
- Copyright (C) Dean Camera, 2010.
+ Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ 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
*/
/** \ingroup Group_USBClassAudio
- * @defgroup Group_USBClassAudioDevice Audio Class Device Mode Driver
+ * \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:
#include "../../USB.h"
#include "../Common/Audio.h"
- #include <string.h>
-
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
#endif
- #if defined(__INCLUDE_FROM_AUDIO_DEVICE_C) && defined(NO_STREAM_CALLBACKS)
- #error The NO_STREAM_CALLBACKS compile time option cannot be used in projects using the library Class drivers.
- #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
- * AudioInterfaceInfo parameter. This stores each Audio interface's configuration and state information.
+ * \c AudioInterfaceInfo parameter. This stores each Audio interface's configuration and state information.
*/
typedef struct
{
*/
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.
*/
* \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing the
* given Audio interface is selected.
*
- * \note The endpoint index numbers as given in the interface's configuration structure must not overlap with any other
- * interface, or endpoint bank corruption will occur. Gaps in the allocated endpoint numbers or non-sequential indexes
- * within a single interface is allowed, but no two interfaces of any type have have interleaved endpoint indexes.
- *
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
*
- * \return Boolean true if the endpoints were successfully configured, false otherwise.
+ * \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);
* \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
*
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
*
- * \return Boolean true if the given Audio interface has a sample to be read, false otherwise.
+ * \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;
*
* \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
*
- * \return Boolean true if the given Audio interface is ready to accept the next sample, false otherwise.
+ * \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;
/** 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
- * ensure the correct endpoint is selected and ready for data.
+ * 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.
*
(void)AudioInterfaceInfo;
- Sample = Endpoint_Read_Byte();
+ Sample = Endpoint_Read_8();
if (!(Endpoint_BytesInEndpoint()))
Endpoint_ClearOUT();
(void)AudioInterfaceInfo;
- Sample = (int16_t)Endpoint_Read_Word_LE();
+ Sample = (int16_t)Endpoint_Read_16_LE();
if (!(Endpoint_BytesInEndpoint()))
Endpoint_ClearOUT();
(void)AudioInterfaceInfo;
- Sample = (((uint32_t)Endpoint_Read_Byte() << 16) | Endpoint_Read_Word_LE());
+ Sample = (((uint32_t)Endpoint_Read_8() << 16) | Endpoint_Read_16_LE());
if (!(Endpoint_BytesInEndpoint()))
Endpoint_ClearOUT();
static inline void Audio_Device_WriteSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
const int8_t Sample)
{
- Endpoint_Write_Byte(Sample);
+ Endpoint_Write_8(Sample);
if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)
Endpoint_ClearIN();
static inline void Audio_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
const int16_t Sample)
{
- Endpoint_Write_Word_LE(Sample);
+ Endpoint_Write_16_LE(Sample);
if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)
Endpoint_ClearIN();
static inline void Audio_Device_WriteSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
const int32_t Sample)
{
- Endpoint_Write_Word_LE(Sample);
- Endpoint_Write_Byte(Sample >> 16);
+ 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)
}
projects / pub / USBasp.git / blobdiff