#
# This file is part of usb_protocol.
#
""" Convenience emitters for USB MIDI Class 1 descriptors. """
from .. import emitter_for_format
from ...emitters.descriptor import ComplexDescriptorEmitter
from ...types.descriptors.midi1 import *
[docs]
class ClassSpecificMidiStreamingInterfaceDescriptorEmitter(ComplexDescriptorEmitter):
DESCRIPTOR_FORMAT = ClassSpecificMidiStreamingInterfaceHeaderDescriptor
def _pre_emit(self):
# Figure out the total length of our descriptor, including subordinates.
subordinate_length = sum(len(sub) for sub in self._subordinates)
self.wTotalLength = subordinate_length + self.DESCRIPTOR_FORMAT.sizeof()
[docs]
class MidiOutJackDescriptorEmitter(ComplexDescriptorEmitter):
DESCRIPTOR_FORMAT = MidiOutJackDescriptorHead
[docs]
def add_subordinate_descriptor(self, subordinate):
subordinate = subordinate.emit()
self._subordinates.append(subordinate)
[docs]
def add_source(self, sourceId, sourcePin=1):
sourceDescriptor = MidiOutJackDescriptorElementEmitter()
sourceDescriptor.baSourceID = sourceId
sourceDescriptor.BaSourcePin = sourcePin
self.add_subordinate_descriptor(sourceDescriptor)
def __setattr__(self, name, value):
if name == "iJack":
self._iJack = value
else:
return super().__setattr__(name, value)
def _pre_emit(self):
foot = MidiOutJackDescriptorFootEmitter()
if hasattr(self, "_iJack"):
foot.iJack = self._iJack
self.add_subordinate_descriptor(foot)
# Figure out the total length of our descriptor, including subordinates.
subordinate_length = sum(len(sub) for sub in self._subordinates)
self.bLength = subordinate_length + self.DESCRIPTOR_FORMAT.sizeof()
[docs]
class ClassSpecificMidiStreamingBulkDataEndpointDescriptorEmitter(ComplexDescriptorEmitter):
DESCRIPTOR_FORMAT = ClassSpecificMidiStreamingBulkDataEndpointDescriptorHead
[docs]
def add_subordinate_descriptor(self, subordinate):
subordinate = subordinate.emit()
self._subordinates.append(subordinate)
[docs]
def add_associated_jack(self, jackID):
jackDescriptor = ClassSpecificMidiStreamingBulkDataEndpointDescriptorElementEmitter()
jackDescriptor.baAssocJackID = jackID
self.add_subordinate_descriptor(jackDescriptor)
def _pre_emit(self):
# Figure out the total length of our descriptor, including subordinates.
subordinate_length = sum(len(sub) for sub in self._subordinates)
self.bLength = subordinate_length + self.DESCRIPTOR_FORMAT.sizeof()
StandardMidiStreamingInterfaceDescriptorEmitter = emitter_for_format(StandardMidiStreamingInterfaceDescriptor)
ClassSpecificMidiStreamingInterfaceHeaderDescriptorEmitter = emitter_for_format(ClassSpecificMidiStreamingInterfaceHeaderDescriptor)
MidiInJackDescriptorEmitter = emitter_for_format(MidiInJackDescriptor)
MidiOutJackDescriptorHeadEmitter = emitter_for_format(MidiOutJackDescriptorHead)
MidiOutJackDescriptorElementEmitter = emitter_for_format(MidiOutJackDescriptorElement)
MidiOutJackDescriptorFootEmitter = emitter_for_format(MidiOutJackDescriptorFoot)
StandardMidiStreamingBulkDataEndpointDescriptorEmitter = emitter_for_format(StandardMidiStreamingBulkDataEndpointDescriptor)
ClassSpecificMidiStreamingBulkDataEndpointDescriptorHeadEmitter = emitter_for_format(ClassSpecificMidiStreamingBulkDataEndpointDescriptorHead)
ClassSpecificMidiStreamingBulkDataEndpointDescriptorElementEmitter = emitter_for_format(ClassSpecificMidiStreamingBulkDataEndpointDescriptorElement)