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midi1: Add the ability to specify iJack #51

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midi1: Add the ability to specify iJack #51

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11 changes: 10 additions & 1 deletion usb_protocol/emitters/descriptors/midi1.py
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Original file line number Diff line number Diff line change
Expand Up @@ -28,8 +28,17 @@ def add_source(self, sourceId, sourcePin=1):
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):
self.add_subordinate_descriptor(MidiOutJackDescriptorFootEmitter())
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()
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