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+--- Thread: rtmidi problem after running the code x times (/thread-33163.html)
rtmidi problem after running the code x times - philipbergwerf - Apr-03-2021
def midi_input():
class Collector(threading.Thread):
def __init__(self, device, port):
threading.Thread.__init__(self)
self.setDaemon(True)
self.port = port
self.portName = device.getPortName(port)
self.device = device
self.quit = False
def run(self):
self.device.openPort(self.port)
self.device.ignoreTypes(True, False, True)
while True:
if self.quit:
return
msg = self.device.getMessage(2500)
if msg:
if msg.isNoteOn():
if midi_record_toggle == 1:
note = msg.getNoteNumber() - 20
textw.insert(textw.index(INSERT), number2pitch[note])
render('q', papercolor)
dev = rtmidi.RtMidiIn()
for i in range(dev.getPortCount()):
device = rtmidi.RtMidiIn()
print('OPENING',dev.getPortName(i))
collector = Collector(device, i)
collector.start()
sys.stdin.read(1)
for c in collectors:
c.quit = True
threading.Thread(target=midi_input).start()I am running this using threading. I don't know what the risks are... The code runs fine but if I run it more than 16 times it gives an Error: 'ALSA lib seq_hw.c:466:(snd_seq_hw_open) open /dev/snd/seq failed: Cannot allocate memory. I think it doesn't close the midi port/process but I don't know how to close this correctly. I noticed that Sunvox(a really cool synth) gives the same error on midi input after I messed up with my code. Is there anything suspicious about my code? how am I supposed to use threading; I used this to make a while loop run while other functions are still working. I took the code from a GitHub page and modified it a little. Thanks!
RE: rtmidi problem after running the code x times - philipbergwerf - Apr-04-2021
I found the solution to this problem. I made a variable 'midiswitch' that is standard set to 1 and when the program closes it is set to 0. The while loop checks if the variable is 0 and closes the loop if so.
def midi_input():
class Collector(threading.Thread):
def __init__(self, device, port):
threading.Thread.__init__(self)
self.setDaemon(True)
self.port = port
self.portName = device.getPortName(port)
self.device = device
self.quit = False
def run(self):
self.device.openPort(self.port)
self.device.ignoreTypes(True, False, True)
while True:
if midiswitch == 0:
return
msg = self.device.getMessage(2500)
if msg:
if msg.isNoteOn():
if midi_record_toggle == 1:
note = msg.getNoteNumber() - 20
if shiftkey == 0:
textw.insert(textw.index(INSERT), number2pitch[note])
elif shiftkey == 1:
textw.insert(textw.index(INSERT), '_'+number2pitch[note])
renderkey()
dev = rtmidi.RtMidiIn()
for i in range(dev.getPortCount()):
device = rtmidi.RtMidiIn()
print('OPENING',dev.getPortName(i))
collector = Collector(device, i)
collector.start()
threading.Thread(target=midi_input).start()