openwebrx-clone/owrx/fft.py
2020-12-30 17:18:46 +01:00

80 lines
2.5 KiB
Python

from owrx.config import Config
from csdr import csdr
import threading
from owrx.source import SdrSource, SdrSourceEventClient
from owrx.property import PropertyStack
import logging
logger = logging.getLogger(__name__)
class SpectrumThread(csdr.output, SdrSourceEventClient):
def __init__(self, sdrSource):
self.sdrSource = sdrSource
super().__init__()
stack = PropertyStack()
stack.addLayer(0, self.sdrSource.props)
stack.addLayer(1, Config.get())
self.props = props = stack.filter(
"samp_rate",
"fft_size",
"fft_fps",
"fft_voverlap_factor",
"fft_compression",
"csdr_dynamic_bufsize",
"csdr_print_bufsizes",
"csdr_through",
"temporary_directory",
)
self.dsp = dsp = csdr.dsp(self)
dsp.nc_port = self.sdrSource.getPort()
dsp.setBuffer(self.sdrSource.getBuffer())
dsp.set_demodulator("fft")
self.subscriptions = [
props.wireProperty("samp_rate", dsp.set_samp_rate),
props.wireProperty("fft_size", dsp.set_fft_size),
props.wireProperty("fft_fps", dsp.set_fft_fps),
props.wireProperty("fft_compression", dsp.set_fft_compression),
props.wireProperty("temporary_directory", dsp.set_temporary_directory),
props.wireProperty("fft_voverlap_factor", dsp.set_fft_voverlap_factor),
]
dsp.csdr_dynamic_bufsize = props["csdr_dynamic_bufsize"]
dsp.csdr_print_bufsizes = props["csdr_print_bufsizes"]
dsp.csdr_through = props["csdr_through"]
logger.debug("Spectrum thread initialized successfully.")
def start(self):
self.sdrSource.addClient(self)
if self.sdrSource.isAvailable():
self.dsp.start()
def supports_type(self, t):
return t == "audio"
def receive_output(self, type, read_fn):
threading.Thread(target=self.pump(read_fn, self.sdrSource.writeSpectrumData)).start()
def stop(self):
self.dsp.stop()
self.sdrSource.removeClient(self)
for c in self.subscriptions:
c.cancel()
self.subscriptions = []
def getClientClass(self):
return SdrSource.CLIENT_USER
def onStateChange(self, state):
if state in [SdrSource.STATE_STOPPING, SdrSource.STATE_FAILED]:
self.dsp.stop()
elif state == SdrSource.STATE_RUNNING:
self.dsp.start()
def onBusyStateChange(self, state):
pass