jack_api_example.py

   1 from calfbox import cbox
   2 import time
   3
   4 def cmd_dumper(cmd, fb, args):
   5     print ("%s(%s)" % (cmd, ",".join(list(map(repr,args)))))
   6
   7 cbox.init_engine()
   8
   9 cbox.Config.add_section("drumpattern:pat1", """
  10 title=Straight - Verse
  11 beats=4
  12 track1=bd
  13 track2=sd
  14 track3=hh
  15 track4=ho
  16 bd_note=c1
  17 sd_note=d1
  18 hh_note=f#1
  19 ho_note=a#1
  20 bd_trigger=9... .... 9.6. ....
  21 sd_trigger=.... 9..5 .2.. 9...
  22 hh_trigger=9353 7353 7353 73.3
  23 ho_trigger=.... .... .... ..3.
  24 """)
  25
  26 cbox.Config.set("io", "use_usb", 0)
  27 cbox.start_audio(cmd_dumper)
  28
  29 global Document
  30 Document = cbox.Document
  31
  32 status = cbox.JackIO.status()
  33 client_name = status.client_name
  34 print ("Client name: %s" % client_name)
  35 print ("Audio inputs: %d, outputs: %d" % (status.audio_inputs, status.audio_outputs))
  36 print ("Sample rate: %d frames/sec" % (status.sample_rate))
  37 print ("JACK period: %d frames" % (status.buffer_size))
  38 uuid = cbox.JackIO.create_midi_output('drums')
  39 cbox.JackIO.autoconnect_midi_output(uuid, '*alsa_pcm:.*')
  40 cbox.JackIO.rename_midi_output(uuid, 'kettles')
  41
  42 uuid_in = cbox.JackIO.create_midi_input('extra')
  43 cbox.JackIO.autoconnect_midi_input(uuid_in, '*alsa_pcm:.*')
  44 cbox.JackIO.rename_midi_input(uuid_in, 'extra_port')
  45
  46 uuid2 = cbox.JackIO.create_midi_output('violins')
  47
  48 status = cbox.JackIO.status()
  49 print ("Before deleting, MIDI outputs: %s" % status.midi_output)
  50
  51 cbox.JackIO.delete_midi_output(uuid2)
  52 status = cbox.JackIO.status()
  53 print ("After deleting, MIDI outputs: %s" % status.midi_output)
  54
  55 print ("Physical audio inputs: %s" % (",".join(cbox.JackIO.get_ports(".*", cbox.JackIO.AUDIO_TYPE, cbox.JackIO.PORT_IS_SOURCE | cbox.JackIO.PORT_IS_PHYSICAL))))
  56 print ("Physical audio outputs: %s" % (",".join(cbox.JackIO.get_ports(".*", cbox.JackIO.AUDIO_TYPE, cbox.JackIO.PORT_IS_SINK | cbox.JackIO.PORT_IS_PHYSICAL))))
  57 print ("Physical MIDI inputs: %s" % (",".join(cbox.JackIO.get_ports(".*", cbox.JackIO.MIDI_TYPE, cbox.JackIO.PORT_IS_SOURCE | cbox.JackIO.PORT_IS_PHYSICAL))))
  58 print ("Physical MIDI outputs: %s" % (",".join(cbox.JackIO.get_ports(".*", cbox.JackIO.MIDI_TYPE, cbox.JackIO.PORT_IS_SINK | cbox.JackIO.PORT_IS_PHYSICAL))))
  59
  60 inputs = cbox.JackIO.get_ports(".*", cbox.JackIO.AUDIO_TYPE, cbox.JackIO.PORT_IS_SOURCE | cbox.JackIO.PORT_IS_PHYSICAL)
  61 outputs = cbox.JackIO.get_ports(".*", cbox.JackIO.AUDIO_TYPE, cbox.JackIO.PORT_IS_SINK | cbox.JackIO.PORT_IS_PHYSICAL)
  62 cbox.JackIO.port_connect(inputs[0], outputs[0])
  63 cbox.JackIO.port_connect(inputs[1], outputs[1])
  64
  65 scene = Document.get_scene()
  66 scene.clear()
  67 instrument = scene.add_new_instrument_layer("test_sampler", "sampler").get_instrument()
  68 pgm_no = instrument.engine.get_unused_program()
  69 pgm = instrument.engine.load_patch_from_file(pgm_no, 'synthbass.sfz', 'SynthBass')
  70 instrument.engine.set_patch(1, pgm_no)
  71 instrument.engine.set_patch(10, pgm_no)
  72
  73 song = Document.get_song()
  74 track = song.add_track()
  75 track.set_external_output(uuid)
  76 print ("Track outputs to: %s:%s" % (client_name, track.status().external_output))
  77 pattern = song.load_drum_pattern("pat1")
  78 track.add_clip(0, 0, pattern.status().loop_end, pattern)
  79 song.set_loop(0, pattern.status().loop_end)
  80 song.update_playback()
  81 cbox.Transport.play()
  82
  83 print("Ready!")
  84
  85 while True:
  86     events = cbox.get_new_events()
  87     if events:
  88         print (events)
  89     time.sleep(0.05)