openwebrx-clone/owrx/audio/chopper.py
2021-08-31 16:54:37 +02:00

79 lines
2.4 KiB
Python

from owrx.modes import Modes, AudioChopperMode
from itertools import groupby
import threading
from owrx.audio import ProfileSourceSubscriber
from owrx.audio.wav import AudioWriter
from csdr.chain import Chain
import pickle
import logging
logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)
class AudioChopper(threading.Thread, Chain, ProfileSourceSubscriber):
# TODO parser typing
def __init__(self, mode_str: str, parser):
self.parser = parser
self.doRun = True
self.writers = []
mode = Modes.findByModulation(mode_str)
if mode is None or not isinstance(mode, AudioChopperMode):
raise ValueError("Mode {} is not an audio chopper mode".format(mode_str))
self.profile_source = mode.get_profile_source()
super().__init__()
Chain.__init__(self, [])
def stop_writers(self):
while self.writers:
self.writers.pop().stop()
def setup_writers(self):
self.stop_writers()
sorted_profiles = sorted(self.profile_source.getProfiles(), key=lambda p: p.getInterval())
groups = {interval: list(group) for interval, group in groupby(sorted_profiles, key=lambda p: p.getInterval())}
writers = [
AudioWriter(self, interval, profiles) for interval, profiles in groups.items()
]
for w in writers:
w.start()
self.writers = writers
def setReader(self, reader):
super().setReader(reader)
self.start()
def stop(self):
self.reader.stop()
super().stop()
def run(self) -> None:
logger.debug("Audio chopper starting up")
self.setup_writers()
self.profile_source.subscribe(self)
while self.doRun:
data = None
try:
data = self.reader.read()
except ValueError:
pass
if data is None:
self.doRun = False
else:
for w in self.writers:
w.write(data.tobytes())
logger.debug("Audio chopper shutting down")
self.profile_source.unsubscribe(self)
self.stop_writers()
def onProfilesChanged(self):
logger.debug("profile change received, resetting writers...")
self.setup_writers()
def send(self, profile, line):
data = self.parser.parse(profile, line)
if data is not None:
self.writer.write(pickle.dumps(data))