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79 lines
3.6 KiB
79 lines
3.6 KiB
#! /usr/bin/env python3
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# -*- coding: utf-8 -*-
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from meta import ly2Track, initCbox, start, connectPhysicalKeyboards
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def processMidiIn(eventLoop):
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"""cbox event: ("event address", None, [firstByte, pitch, velocit])
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Cbox event come in pairs
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first is the normal midi-event + channel
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channel = first & 0x0F
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mode = first & 0xF0
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Of course it doesn't need to be pitch and velocity.
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But this is easier to document than "data2, data3"
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Either call cbox.call_on_idle or cbox.get_new_events.
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Both will clean the event queue but only the latter will give us
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the results as python data.
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"""
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eventList = cbox.get_new_events()
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lenList = len(eventList)
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if lenList >= 2 and lenList % 2 == 0:
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for (address, uninterestingStuff, event) in eventList: #we are only interested in the event, which is a list again.
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#print (address, "event:", event, "playback:", cbox.Transport.status().playing)
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if address in ("/io/midi/event_time_samples", "/io/midi/event_time_ppqn", ):
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assert len(event) == 1
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#We are very strict at the moment. A timestamp is only allowed if there wasn't another timestamp waiting. It is strict because only simple_event with len==3 eat up the timestamp. Any other event will trigger an error.
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if processMidiIn.lastTimestamp:
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raise NotImplementedError("the previous event didn't eat up the timestamp")
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else:
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if address == "/io/midi/event_time_ppqn":
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assert cbox.Transport.status().playing == 1
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during_recording = True
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else:
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assert not cbox.Transport.status().playing == 1
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during_recording = False
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processMidiIn.lastTimestamp = event[0]
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elif address == "/io/midi/simple_event" and len(event) == 3: #we can only unpack the event after knowing its length.
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assert processMidiIn.lastTimestamp # Midi events are always preceded by timestamps
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first, second, third = event
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channel = first & 0x0F
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mode = first & 0xF0 #0x90 note on, 0x80 note off and so on.
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if mode == 0x90: #Note On. 144 in decimal
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midipitch = second
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velocity = third
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if during_recording:
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print("ON: {}, Channel: {}, Pitch: {}, Velocity: {}".format(processMidiIn.lastTimestamp, channel, midipitch, velocity))
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#else:
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# print("ON Time-Samples: {}, Channel: {}, Pitch: {}, Velocity: {}".format(processMidiIn.lastTimestamp, channel, midipitch, velocity))
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elif mode == 0x80: #Note Off. 128 in decimal
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midipitch = second
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velocity = third
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if during_recording:
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print("OFF: {}, Channel: {}, Pitch: {}, Velocity: {}".format(processMidiIn.lastTimestamp, channel, midipitch, velocity))
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#elif mode == 0xB0: #CC
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# ccNumber = second
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# ccValue = third
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#else:
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#discard the events
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processMidiIn.lastTimestamp = None
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else:
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raise NotImplementedError("Address type {} unknown".format(address))
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eventLoop.call_later(0.1, processMidiIn, eventLoop)
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processMidiIn.lastTimestamp = None
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scene, cbox, eventLoop = initCbox("test01", internalEventProcessor=False)
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#ly2Track(trackName="doWeNeedThis", lyString="c8")
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eventLoop.call_later(0.1, processMidiIn, eventLoop) #100ms
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connectPhysicalKeyboards()
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start()
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