adhoc_example.py

   1 import os
   2 import sys
   3 import struct
   4 import time
   5 import unittest
   6
   7 sys.path = ["./py"] + sys.path
   8
   9 import cbox
  10
  11 global Document
  12 global Transport
  13 Document = cbox.Document
  14 Transport = cbox.Transport
  15
  16 song = Document.get_song()
  17
  18 # Delete all the tracks and patterns
  19 song.clear()
  20
  21 # Create a binary blob that contains the MIDI events
  22 pblob = bytes()
  23 for noteindex in range(20):
  24     # note on
  25     pblob += cbox.Pattern.serialize_event(noteindex * 12, 0x90, 36+noteindex*3, 127)
  26     # note off
  27     pblob += cbox.Pattern.serialize_event(noteindex * 12 + 11, 0x90, 36+noteindex*3, 0)
  28
  29 # This will be the length of the pattern (in pulses). It should be large enough
  30 # to fit all the events
  31 pattern_len = 10 * 24 * 2
  32
  33 # Create a new pattern object using events from the blob
  34 pattern = song.pattern_from_blob(pblob, pattern_len)
  35
  36 retrig = 10
  37 while True:
  38     retrig -= 1
  39     if retrig <= 0:
  40         print ("Triggering adhoc pattern with ID 1")
  41         Document.get_scene().play_pattern(pattern, 240, 1)
  42         retrig = 10
  43     # Query JACK ports, new USB devices etc.
  44     cbox.call_on_idle()
  45     time.sleep(0.1)