openwebrx-clone/owrx/dsp.py

from owrx.meta import MetaParser
from owrx.wsjt import WsjtParser
from owrx.js8 import Js8Parser
from owrx.aprs import AprsParser
from owrx.pocsag import PocsagParser
from owrx.source import SdrSource
from owrx.property import PropertyStack, PropertyLayer
from owrx.modes import Modes
from csdr import csdr
import threading

import logging

logger = logging.getLogger(__name__)


class DspManager(csdr.output):
    def __init__(self, handler, sdrSource):
        self.handler = handler
        self.sdrSource = sdrSource
        self.parsers = {
            "meta": MetaParser(self.handler),
            "wsjt_demod": WsjtParser(self.handler),
            "packet_demod": AprsParser(self.handler),
            "pocsag_demod": PocsagParser(self.handler),
            "js8_demod": Js8Parser(self.handler),
        }

        self.props = PropertyStack()
        # local demodulator properties not forwarded to the sdr
        self.props.addLayer(0, PropertyLayer().filter(
            "output_rate",
            "squelch_level",
            "secondary_mod",
            "low_cut",
            "high_cut",
            "offset_freq",
            "mod",
            "secondary_offset_freq",
            "dmr_filter",
        ))
        # properties that we inherit from the sdr
        self.props.addLayer(1, self.sdrSource.getProps().filter(
            "audio_compression",
            "fft_compression",
            "digimodes_fft_size",
            "csdr_dynamic_bufsize",
            "csdr_print_bufsizes",
            "csdr_through",
            "digimodes_enable",
            "samp_rate",
            "digital_voice_unvoiced_quality",
            "temporary_directory",
            "center_freq",
            "start_mod",
            "start_freq",
        ))

        self.dsp = csdr.dsp(self)
        self.dsp.nc_port = self.sdrSource.getPort()

        def set_low_cut(cut):
            bpf = self.dsp.get_bpf()
            bpf[0] = cut
            self.dsp.set_bpf(*bpf)

        def set_high_cut(cut):
            bpf = self.dsp.get_bpf()
            bpf[1] = cut
            self.dsp.set_bpf(*bpf)

        def set_dial_freq(key, value):
            freq = self.props["center_freq"] + self.props["offset_freq"]
            for parser in self.parsers.values():
                parser.setDialFrequency(freq)

        if "start_mod" in self.props:
            self.dsp.set_demodulator(self.props["start_mod"])
            mode = Modes.findByModulation(self.props["start_mod"])

            if mode and mode.bandpass:
                self.dsp.set_bpf(mode.bandpass.low_cut, mode.bandpass.high_cut)
            else:
                self.dsp.set_bpf(-4000, 4000)

        if "start_freq" in self.props and "center_freq" in self.props:
            self.dsp.set_offset_freq(self.props["start_freq"] - self.props["center_freq"])
        else:
            self.dsp.set_offset_freq(0)

        self.subscriptions = [
            self.props.wireProperty("audio_compression", self.dsp.set_audio_compression),
            self.props.wireProperty("fft_compression", self.dsp.set_fft_compression),
            self.props.wireProperty("digimodes_fft_size", self.dsp.set_secondary_fft_size),
            self.props.wireProperty("samp_rate", self.dsp.set_samp_rate),
            self.props.wireProperty("output_rate", self.dsp.set_output_rate),
            self.props.wireProperty("offset_freq", self.dsp.set_offset_freq),
            self.props.wireProperty("center_freq", self.dsp.set_center_freq),
            self.props.wireProperty("squelch_level", self.dsp.set_squelch_level),
            self.props.wireProperty("low_cut", set_low_cut),
            self.props.wireProperty("high_cut", set_high_cut),
            self.props.wireProperty("mod", self.dsp.set_demodulator),
            self.props.wireProperty("digital_voice_unvoiced_quality", self.dsp.set_unvoiced_quality),
            self.props.wireProperty("dmr_filter", self.dsp.set_dmr_filter),
            self.props.wireProperty("temporary_directory", self.dsp.set_temporary_directory),
            self.props.filter("center_freq", "offset_freq").wire(set_dial_freq),
        ]

        self.dsp.csdr_dynamic_bufsize = self.props["csdr_dynamic_bufsize"]
        self.dsp.csdr_print_bufsizes = self.props["csdr_print_bufsizes"]
        self.dsp.csdr_through = self.props["csdr_through"]

        if self.props["digimodes_enable"]:

            def set_secondary_mod(mod):
                if mod == False:
                    mod = None
                self.dsp.set_secondary_demodulator(mod)
                if mod is not None:
                    self.handler.write_secondary_dsp_config(
                        {
                            "secondary_fft_size": self.props["digimodes_fft_size"],
                            "if_samp_rate": self.dsp.if_samp_rate(),
                            "secondary_bw": self.dsp.secondary_bw(),
                        }
                    )

            self.subscriptions += [
                self.props.wireProperty("secondary_mod", set_secondary_mod),
                self.props.wireProperty("secondary_offset_freq", self.dsp.set_secondary_offset_freq),
            ]

        self.sdrSource.addClient(self)

        super().__init__()

    def start(self):
        if self.sdrSource.isAvailable():
            self.dsp.start()

    def receive_output(self, t, read_fn):
        logger.debug("adding new output of type %s", t)
        writers = {
            "audio": self.handler.write_dsp_data,
            "smeter": self.handler.write_s_meter_level,
            "secondary_fft": self.handler.write_secondary_fft,
            "secondary_demod": self.handler.write_secondary_demod,
        }
        for demod, parser in self.parsers.items():
            writers[demod] = parser.parse

        write = writers[t]

        threading.Thread(target=self.pump(read_fn, write)).start()

    def stop(self):
        self.dsp.stop()
        self.sdrSource.removeClient(self)
        for sub in self.subscriptions:
            sub.cancel()
        self.subscriptions = []

    def setProperty(self, prop, value):
        self.props[prop] = value

    def getClientClass(self):
        return SdrSource.CLIENT_USER

    def onStateChange(self, state):
        if state == SdrSource.STATE_RUNNING:
            logger.debug("received STATE_RUNNING, attempting DspSource restart")
            self.dsp.start()
        elif state == SdrSource.STATE_STOPPING:
            logger.debug("received STATE_STOPPING, shutting down DspSource")
            self.dsp.stop()
        elif state == SdrSource.STATE_FAILED:
            logger.debug("received STATE_FAILED, shutting down DspSource")
            self.dsp.stop()

    def onBusyStateChange(self, state):
        pass