* configuration is provided, returns the maximum possible capabilities
* of the device.
*
- * @param device_ctx a reference to the associated AVHWDeviceContext.
+ * @param ref a reference to the associated AVHWDeviceContext.
* @param hwconfig a filled HW-specific configuration structure, or NULL
* to return the maximum possible capabilities of the device.
* @return AVHWFramesConstraints structure describing the constraints