Feature
usb_audio_feature_unit_descriptor* Feature
fID = Feature->unit_id;
fSourceID = Feature->source_id;
uint8 channelsCount = (Feature->length - 6) / controlSize;
uint8* ControlsBitmapPointer = (uint8*)&Feature->r2.bma_controls[0];
controlSize = Feature->r1.control_size;
channelsCount = (Feature->length - 7) / Feature->r1.control_size;
ControlsBitmapPointer = &Feature->r1.bma_controls[0];
status_t Feature(main_item_data data);