2.3.4 Library Interface
This section describes the Application Programming Interface (API) functions of the USB Device Audio 1.0 Library.
Refer to each section for a detailed description.
a) Functions
| Name | Description |
| USB_DEVICE_AUDIO_EventHandlerSet | This function registers an event handler for the specified Audio function driver instance. |
| USB_DEVICE_AUDIO_Read | This function requests a data read from the USB Device Audio Function Driver Layer. |
| USB_DEVICE_AUDIO_TransferCancel | This function cancels a scheduled Audio Device data transfer. |
| USB_DEVICE_AUDIO_Write | This function requests a data write to the USB Device Audio Function Driver Layer. |
| USB_DEVICE_AUDIO_StatusSend | This function requests a Status write to the USB Device Audio Function Driver Layer. |
b) Data Types and Constants
| Name | Description |
| USB_DEVICE_AUDIO_INDEX | USB Device Audio function driver index. |
| USB_DEVICE_AUDIO_TRANSFER_HANDLE | USB Device Audio Function Driver transfer handle definition. |
| USB_DEVICE_AUDIO_EVENT | USB Device Audio Function Driver events. |
| USB_DEVICE_AUDIO_RESULT | USB Device Audio Function Driver USB Device Audio result enumeration. |
| USB_DEVICE_AUDIO_TRANSFER_HANDLE_INVALID | USB Device Audio Function Driver invalid transfer handle definition. |
| USB_DEVICE_AUDIO_EVENT_DATA_READ_COMPLETE | USB Device Audio Function Driver audio read and write complete event data. |
| USB_DEVICE_AUDIO_EVENT_DATA_WRITE_COMPLETE | USB Device Audio Function Driver audio read and write complete event data. |
| USB_DEVICE_AUDIO_EVENT_HANDLER | USB Device Audio event handler function pointer type. |
| USB_DEVICE_AUDIO_EVENT_RESPONSE | USB Device Audio Function Driver event callback response type. |
| USB_DEVICE_AUDIO_EVENT_RESPONSE_NONE | USB Device Audio Function Driver event handler response type none. |
| USB_DEVICE_AUDIO_FUNCTION_DRIVER | USB Device Audio Function Driver function pointer. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_CUR | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_CUR. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_MAX | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_MAX. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_MEM | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_MEM. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_MIN | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_MIN. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_RES | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_GET_RES. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_CUR | USB Device Audio Function Driver set and get request data. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_MAX | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_MAX. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_MEM | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_MEM. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_MIN | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_MIN. |
| USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_RES | This is type USB_DEVICE_AUDIO_EVENT_DATA_CONTROL_SET_RES. |
| USB_DEVICE_AUDIO_EVENT_DATA_ENTITY_GET_STAT | This is type USB_DEVICE_AUDIO_EVENT_DATA_ENTITY_GET_STAT. |
| USB_DEVICE_AUDIO_EVENT_DATA_INTERFACE_SETTING_CHANGED | USB Device Audio Function Driver alternate interface setting event data. |
| USB_DEVICE_AUDIO_INIT | USB Device Audio Function Driver initialization data structure. |
| USB_DEVICE_AUDIO_EVENT_DATA_STATUS_SEND_COMPLETE | USB Device Audio Function Driver Status Send complete event data. |