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77 lines
2.0 KiB
77 lines
2.0 KiB
5 years ago
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import os
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import sys
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import struct
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import time
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import unittest
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sys.path = ["./py"] + sys.path
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import cbox
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global Document
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global Transport
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Document = cbox.Document
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Transport = cbox.Transport
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# Make sure playback doesn't start prematurely
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Transport.stop()
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song = Document.get_song()
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# Delete all the tracks and patterns
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song.clear()
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# Add the first track
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trk = song.add_track()
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trk.clear_clips()
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# Create a binary blob that contains the MIDI events
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pblob = bytes()
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for noteindex in range(20):
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# note on
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pblob += cbox.Pattern.serialize_event(noteindex * 24, 0x90, 36+noteindex*3, 127)
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# note off
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pblob += cbox.Pattern.serialize_event(noteindex * 24 + 23, 0x90, 36+noteindex*3, 0)
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# This will be the length of the pattern (in pulses). It should be large enough
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# to fit all the events
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pattern_len = 10 * 24 * 2
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# Create a new pattern object using events from the blob
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pattern = song.pattern_from_blob(pblob, pattern_len)
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# Add an instance (clip) of the pattern to the track at position 0
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# The clip will contain the whole pattern (it is also possible to insert
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# a single slice of the pattern)
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clip = trk.add_clip(0, 0, pattern_len, pattern)
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# Stop the song at the end
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#song.set_loop(pattern_len, pattern_len)
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song.set_loop(pattern_len, pattern_len)
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# Set tempo - the argument must be a float
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Transport.set_tempo(160.0)
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# Send the updated song data to the realtime thread
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song.update_playback()
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# Flush
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Transport.stop()
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print ("Song length (seconds) is %f" % (cbox.Transport.ppqn_to_samples(pattern_len) * 1.0 / Transport.status().sample_rate))
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# The /master object API doesn't have any nice Python wrapper yet, so accessing
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# it is a bit ugly, still - it works
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# Start playback
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Transport.play()
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print ("Playing")
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while True:
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# Get transport information - current position (samples and pulses), current tempo etc.
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master = Transport.status()
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print (master.pos_ppqn)
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# Query JACK ports, new USB devices etc.
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cbox.call_on_idle()
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time.sleep(0.1)
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