331 lines
12 KiB
Python
331 lines
12 KiB
Python
import subprocess
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from owrx.config import PropertyManager, FeatureDetector
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import threading
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import csdr
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import time
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import os
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import signal
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class RtlNmuxSource(object):
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types = {
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"rtl_sdr": {
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"command": "rtl_sdr -s {samp_rate} -f {center_freq} -p {ppm} -g {rf_gain} -",
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"format_conversion": "csdr convert_u8_f",
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},
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"hackrf": {
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"command": "hackrf_transfer -s {samp_rate} -f {center_freq} -g {rf_gain} -l{lna_gain} -a{rf_amp} -r-",
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"format_conversion": "csdr convert_s8_f"
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},
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"sdrplay": {
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"command": "rx_sdr -F CF32 -s {samp_rate} -f {center_freq} -p {ppm} -g {rf_gain} -",
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"format_conversion": None
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}
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}
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def setup(self):
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self.props = props = PropertyManager.getSharedInstance().collect(
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"rtl_type", "samp_rate", "nmux_memory", "iq_server_port", "center_freq", "ppm",
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"rf_gain", "lna_gain", "rf_amp"
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)
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def restart(name, value):
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print("would now restart rtl source due to property change: {0} changed to {1}".format(name, value))
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self.stop()
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self.start()
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props.wire(restart)
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self.start()
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def start(self):
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props = self.props
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featureDetector = FeatureDetector()
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if not featureDetector.is_available(props["rtl_type"]):
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print("The RTL source type {0} is not available. please check requirements.".format(props["rtl_type"]))
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return
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params = RtlNmuxSource.types[props["rtl_type"]]
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start_sdr_command = params["command"].format(
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samp_rate = props["samp_rate"],
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center_freq = props["center_freq"],
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ppm = props["ppm"],
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rf_gain = props["rf_gain"],
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lna_gain = props["lna_gain"],
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rf_amp = props["rf_amp"]
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)
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if params["format_conversion"] is not None:
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start_sdr_command += " | " + params["format_conversion"]
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nmux_bufcnt = nmux_bufsize = 0
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while nmux_bufsize < props["samp_rate"]/4: nmux_bufsize += 4096
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while nmux_bufsize * nmux_bufcnt < props["nmux_memory"] * 1e6: nmux_bufcnt += 1
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if nmux_bufcnt == 0 or nmux_bufsize == 0:
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print("[RtlNmuxSource] Error: nmux_bufsize or nmux_bufcnt is zero. These depend on nmux_memory and samp_rate options in config_webrx.py")
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return
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print("[RtlNmuxSource] nmux_bufsize = %d, nmux_bufcnt = %d" % (nmux_bufsize, nmux_bufcnt))
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cmd = start_sdr_command + " | nmux --bufsize %d --bufcnt %d --port %d --address 127.0.0.1" % (nmux_bufsize, nmux_bufcnt, props["iq_server_port"])
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self.process = subprocess.Popen(cmd, shell=True, preexec_fn=os.setpgrp)
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print("[RtlNmuxSource] Started rtl source: " + cmd)
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# TODO use this to monitor unexpected failures / shutdowns and react accordingly
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def wait_for_process_to_end():
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rc = self.process.wait()
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print("[RtlNmuxSource] shut down with RC={0}".format(rc))
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threading.Thread(target = wait_for_process_to_end).start()
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def stop(self):
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os.killpg(os.getpgid(self.process.pid), signal.SIGTERM)
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class SpectrumThread(threading.Thread):
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sharedInstance = None
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@staticmethod
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def getSharedInstance():
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if SpectrumThread.sharedInstance is None:
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SpectrumThread.sharedInstance = SpectrumThread()
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SpectrumThread.sharedInstance.start()
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return SpectrumThread.sharedInstance
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def __init__(self):
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self.clients = []
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self.doRun = True
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super().__init__()
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def run(self):
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props = PropertyManager.getSharedInstance().collect(
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"samp_rate", "fft_size", "fft_fps", "fft_voverlap_factor", "fft_compression",
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"csdr_dynamic_bufsize", "csdr_print_bufsizes", "csdr_through", "iq_server_port"
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)
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samp_rate = props["samp_rate"]
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fft_size = props["fft_size"]
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fft_fps = props["fft_fps"]
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fft_voverlap_factor = props["fft_voverlap_factor"]
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dsp = csdr.dsp()
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dsp.nc_port = props["iq_server_port"]
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dsp.set_demodulator("fft")
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dsp.set_samp_rate(samp_rate)
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dsp.set_fft_size(fft_size)
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dsp.set_fft_fps(fft_fps)
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dsp.set_fft_averages(int(round(1.0 * samp_rate / fft_size / fft_fps / (1.0 - fft_voverlap_factor))) if fft_voverlap_factor>0 else 0)
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dsp.set_fft_compression(props["fft_compression"])
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dsp.csdr_dynamic_bufsize = props["csdr_dynamic_bufsize"]
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dsp.csdr_print_bufsizes = props["csdr_print_bufsizes"]
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dsp.csdr_through = props["csdr_through"]
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print("[openwebrx-spectrum] Spectrum thread initialized successfully.")
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dsp.start()
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if props["csdr_dynamic_bufsize"]:
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dsp.read(8) #dummy read to skip bufsize & preamble
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print("[openwebrx-spectrum] Note: CSDR_DYNAMIC_BUFSIZE_ON = 1")
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print("[openwebrx-spectrum] Spectrum thread started.")
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bytes_to_read=int(dsp.get_fft_bytes_to_read())
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while self.doRun:
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data=dsp.read(bytes_to_read)
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if len(data) == 0:
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time.sleep(1)
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else:
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for c in self.clients:
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c.write_spectrum_data(data)
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dsp.stop()
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print("spectrum thread shut down")
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def add_client(self, c):
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self.clients.append(c)
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def remove_client(self, c):
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self.clients.remove(c)
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if not self.clients:
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self.shutdown()
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def shutdown(self):
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print("shutting down spectrum thread")
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SpectrumThread.sharedInstance = None
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self.doRun = False
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class DspManager(object):
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def __init__(self, handler):
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self.doRun = True
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self.handler = handler
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self.localProps = PropertyManager.getSharedInstance().collect(
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"audio_compression", "fft_compression", "digimodes_fft_size", "csdr_dynamic_bufsize",
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"csdr_print_bufsizes", "csdr_through", "iq_server_port", "digimodes_enable", "samp_rate"
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)
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self.dsp = csdr.dsp()
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#dsp_initialized=False
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self.localProps.getProperty("audio_compression").wire(self.dsp.set_audio_compression)
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self.localProps.getProperty("fft_compression").wire(self.dsp.set_fft_compression)
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self.dsp.set_offset_freq(0)
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self.dsp.set_bpf(-4000,4000)
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self.localProps.getProperty("digimodes_fft_size").wire(self.dsp.set_secondary_fft_size)
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self.dsp.nc_port = self.localProps["iq_server_port"]
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self.dsp.csdr_dynamic_bufsize = self.localProps["csdr_dynamic_bufsize"]
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self.dsp.csdr_print_bufsizes = self.localProps["csdr_print_bufsizes"]
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self.dsp.csdr_through = self.localProps["csdr_through"]
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self.localProps.getProperty("samp_rate").wire(self.dsp.set_samp_rate)
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#do_secondary_demod=False
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self.localProps.getProperty("output_rate").wire(self.dsp.set_output_rate)
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self.localProps.getProperty("offset_freq").wire(self.dsp.set_offset_freq)
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self.localProps.getProperty("squelch_level").wire(self.dsp.set_squelch_level)
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def set_low_cut(cut):
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bpf = self.dsp.get_bpf()
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bpf[0] = cut
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self.dsp.set_bpf(*bpf)
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self.localProps.getProperty("low_cut").wire(set_low_cut)
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def set_high_cut(cut):
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bpf = self.dsp.get_bpf()
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bpf[1] = cut
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self.dsp.set_bpf(*bpf)
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self.localProps.getProperty("high_cut").wire(set_high_cut)
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def set_mod(mod):
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if (self.dsp.get_demodulator() == mod): return
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self.dsp.stop()
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self.dsp.set_demodulator(mod)
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self.dsp.start()
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self.localProps.getProperty("mod").wire(set_mod)
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if (self.localProps["digimodes_enable"]):
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def set_secondary_mod(mod):
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if mod == False: mod = None
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if self.dsp.get_secondary_demodulator() == mod: return
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self.stopSecondaryThreads()
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self.dsp.stop()
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if mod is None:
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self.dsp.set_secondary_demodulator(None)
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else:
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self.dsp.set_secondary_demodulator(mod)
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self.handler.write_secondary_dsp_config({
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"secondary_fft_size":self.localProps["digimodes_fft_size"],
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"if_samp_rate":self.dsp.if_samp_rate(),
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"secondary_bw":self.dsp.secondary_bw()
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})
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self.dsp.start()
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if mod:
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self.startSecondaryThreads()
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self.localProps.getProperty("secondary_mod").wire(set_secondary_mod)
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self.localProps.getProperty("secondary_offset_freq").wire(self.dsp.set_secondary_offset_freq)
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super().__init__()
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def start(self):
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self.dsp.start()
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threading.Thread(target = self.readDspOutput).start()
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threading.Thread(target = self.readSMeterOutput).start()
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def startSecondaryThreads(self):
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self.runSecondary = True
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self.secondaryDemodThread = threading.Thread(target = self.readSecondaryDemod)
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self.secondaryDemodThread.start()
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self.secondaryFftThread = threading.Thread(target = self.readSecondaryFft)
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self.secondaryFftThread.start()
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def stopSecondaryThreads(self):
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self.runSecondary = False
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self.secondaryDemodThread = None
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self.secondaryFftThread = None
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def readDspOutput(self):
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while (self.doRun):
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data = self.dsp.read(256)
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if len(data) != 256:
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time.sleep(1)
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else:
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self.handler.write_dsp_data(data)
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def readSMeterOutput(self):
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while (self.doRun):
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level = self.dsp.get_smeter_level()
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self.handler.write_s_meter_level(level)
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def readSecondaryDemod(self):
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while (self.runSecondary):
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data = self.dsp.read_secondary_demod(1)
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self.handler.write_secondary_demod(data)
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def readSecondaryFft(self):
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while (self.runSecondary):
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data = self.dsp.read_secondary_fft(int(self.dsp.get_secondary_fft_bytes_to_read()))
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self.handler.write_secondary_fft(data)
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def stop(self):
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self.doRun = False
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self.runSecondary = False
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self.dsp.stop()
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def setProperty(self, prop, value):
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self.localProps.getProperty(prop).setValue(value)
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class CpuUsageThread(threading.Thread):
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sharedInstance = None
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@staticmethod
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def getSharedInstance():
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if CpuUsageThread.sharedInstance is None:
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CpuUsageThread.sharedInstance = CpuUsageThread()
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CpuUsageThread.sharedInstance.start()
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return CpuUsageThread.sharedInstance
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def __init__(self):
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self.clients = []
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self.doRun = True
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self.last_worktime = 0
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self.last_idletime = 0
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super().__init__()
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def run(self):
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while self.doRun:
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time.sleep(3)
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try:
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cpu_usage = self.get_cpu_usage()
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except:
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cpu_usage = 0
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for c in self.clients:
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c.write_cpu_usage(cpu_usage)
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print("cpu usage thread shut down")
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def get_cpu_usage(self):
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try:
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f = open("/proc/stat","r")
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except:
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return 0 #Workaround, possibly we're on a Mac
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line = ""
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while not "cpu " in line: line=f.readline()
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f.close()
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spl = line.split(" ")
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worktime = int(spl[2]) + int(spl[3]) + int(spl[4])
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idletime = int(spl[5])
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dworktime = (worktime - self.last_worktime)
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didletime = (idletime - self.last_idletime)
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rate = float(dworktime) / (didletime+dworktime)
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self.last_worktime = worktime
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self.last_idletime = idletime
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if (self.last_worktime==0): return 0
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return rate
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def add_client(self, c):
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self.clients.append(c)
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def remove_client(self, c):
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self.clients.remove(c)
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if not self.clients:
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self.shutdown()
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def shutdown(self):
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print("shutting down cpu usage thread")
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CpuUsageThread.sharedInstance = None
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self.doRun = False
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