ahoneybun/qmk_firmware
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added new CALLBACK_Audio_Device_GetSetInterfaceProperty() callback to the Audio Device Class driver.

Browse source
This commit is contained in:
Dean Camera 2012-01-28 18:07:35 +00:00
parent dd312cead4
commit a147cee95f
6 changed files with 139 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

32
Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
View file

@ -271,3 +271,35 @@ bool CALLBACK_Audio_Device_GetSetEndpointProperty(USB_ClassInfo_Audio_Device_t*
return false;
}
/** Audio class driver callback for the setting and retrieval of streaming interface properties. This callback must be implemented
* in the user application to handle property manipulations on streaming audio interfaces.
*
* When the DataLength parameter is NULL, this callback should only indicate whether the specified operation is valid for
* the given entity 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] Property Property of the interface to get or set, a value from \ref Audio_ClassRequests_t.
* \param[in] EntityAddress Address of the audio entity whose property is being referenced.
* \param[in] Parameter Parameter of the entity to get or set, specific to each type of entity (see USB Audio specification).
* \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 \c true if the property GET/SET was successful, \c false otherwise
*/
bool CALLBACK_Audio_Device_GetSetInterfaceProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
const uint8_t Property,
const uint8_t EntityAddress,
const uint16_t Parameter,
uint16_t* const DataLength,
uint8_t* Data)
{
/* No audio interface entities in the device descriptor, thus no properties to get or set. */
return false;
}