add BCR bridge

.gitignore

@@ -8,3 +8,5 @@ obj
 doc/html
 doc/xml
 doc/_build
+site-packages
+pyvenv.cfg

bridge/bridge.py

@@ -0,0 +1,165 @@
+#!bridge/bin/python3
+
+import alsa_midi
+from bindings.capmix import capmix, EVENT
+
+from alsa_midi import SequencerClient, ControlChangeEvent
+
+monitors = ['a','b','c','d']
+mutes = { (ch+1): { mon: 0 for mon in monitors } for ch in range(0, 16) }
+stereo = { (ch+1): 0 for ch in range(0,16) }
+
+labels = [
+	'  Mic ',
+	'Guitar',
+	'Deluge',
+	'Opsix',
+	'Phatty',
+	' SM10 ',
+	'Circuit',
+	' JUNO ',
+]
+control_map = {
+	1, 3, 5, 7, 9, 11, 13, 15,
+	257, 259, 261, 263, 265, 267, 269, 271,
+}
+
+def print_monitor_mutes():
+	print("\0337\033[H\033[2K   ", end='')
+	for ch in range(0, 16):
+		print("%4d  " % (ch+1), end='')
+	print()
+	print("\033[2K", end='')
+	for ch in range(0, 16, 2):
+		st = "STEREO" if stereo[ch+1] else ""
+		print("  %10s" % st, end='')
+	print()
+	for mon in monitors:
+		print("\033[2K", end='')
+		print("%2s " % (mon.upper()), end='')
+		for ch in range(0, 16):
+			value = mutes[ch+1][mon]
+			if value == 0:
+				msg = "----"
+			else:
+				msg = "MUTE"
+			print("%5s " % (msg), end='')
+		print()
+	print("\033[2K")
+	print("\033[2K",end='')
+	for label in labels:
+		print("  %10s" % label, end='')
+	print()
+	print("\033[2K")
+	print("\0338", end='')
+
+nrpn_msb = 0
+nrpn_lsb = 0
+def bcr_listener(event):
+	global nrpn_msb, nrpn_lsb
+	if event.channel != 15:
+		return
+	if event.param == 99: # MSB
+		nrpn_msb = event.value
+	if event.param == 98: # LSB
+		nrpn_lsb = event.value
+	if event.param == 6: # data
+		handle_nrpn(nrpn_msb, nrpn_lsb, event.value)
+
+	print(repr(event))
+	print_monitor_mutes()
+
+def handle_nrpn(msb, lsb, value):
+	param = ""
+	if msb >= 0 and msb <= 3:
+		mon = monitors[msb]
+		param = "input_monitor." + mon
+	if lsb >= 1 and lsb <= 16:
+		ch = lsb
+		param += ".channel." + str(ch) + ".mute"
+		value = 1 if value > 0 else 0
+	addr = capmix.parse_addr(param)
+	capmix.put(addr, value)
+
+queue = []
+def main():
+	# setup MIDI I/O
+	client = SequencerClient("midipi")
+	port = client.create_port("io")
+	client_ports = client.list_ports()
+	# rtpmidi needed to access the BCR-2000
+	bcr_ports = list(filter(lambda x: x is not None, [ x if x.name == 'mioXL-16-BCR' else None for x in client_ports ]))
+	if len(bcr_ports) > 0:
+		bcr_port = bcr_ports[0]
+		port.connect_to(bcr_port)
+		port.connect_from(bcr_port)
+	else:
+		print("Unable to connect to BCR-2000")
+
+	# setup capmix
+	capmix.set_model(4)
+	def listener(event):
+		global queue
+		value = event.value()
+		addr = capmix.format_addr(event.addr)
+		if 'input_monitor.' in addr:
+			dirty = True
+			if '.mute' in addr:
+				ch  = ((event.addr & 0x0f00) >> 8) + 1
+				mon = monitors[(event.addr & 0xf000) >> 12]
+				mute = value.unpacked.discrete
+				mutes[ch][mon] = mute
+				queue += [[ord(mon) - ord('a'), ch, 0 if mute == 0 else 127]]
+			elif '.stereo' in addr:
+				ch  = ((event.addr & 0x0f00) >> 8) + 1
+				stereo[ch] = value.unpacked.discrete
+
+		print("addr=%x=%s type=%s v=%s" % (event.addr, addr, event.type_name(), value))
+		print_monitor_mutes()
+
+	def bcr_listen(client):
+		event = client.event_input(timeout=0.01)
+		if event:
+			bcr_listener(event)
+
+	def bcr_sync(client):
+		global queue
+		for msg in queue:
+			event = ControlChangeEvent(channel=15, param=99, value=msg[0])
+			client.event_output(event, port=port)
+			#print(repr(event))
+
+			event = ControlChangeEvent(channel=15, param=98, value=msg[1])
+			client.event_output(event, port=port)
+			#print(repr(event))
+
+			event = ControlChangeEvent(channel=15, param=6, value=msg[2])
+			client.event_output(event, port=port)
+			#print(repr(event))
+		client.drain_output()
+
+		queue = []
+
+	ok = capmix.connect(listener)
+	if not ok:
+		print("Unable to connect to STUDIO-CAPTURE")
+
+	try:
+		if ok:
+			for ch in range(0,16,2):
+				capmix.get(capmix.parse_addr("input_monitor.a.channel.{}.stereo".format(ch+1)))
+			for ch in range(0,16):
+				for mon in monitors:
+					capmix.get(capmix.parse_addr("input_monitor.{}.channel.{}.mute".format(mon, ch+1)))
+		while True:
+			if ok:
+				x = capmix.listen()
+				bcr_sync(client)
+			bcr_listen(client)
+	except KeyboardInterrupt:
+		pass
+	capmix.disconnect()
+	print("Done.")
+
+if __name__ == '__main__':
+	main()

bridge/requirements.txt

@@ -0,0 +1,7 @@
+alsa-midi==1.0.2
+cffi==1.16.0
+construct==2.10.70
+future==1.0.0
+pycparser==2.21
+pymidi==0.5.0
+six==1.16.0