557 lines
22 KiB
Python
Executable File
557 lines
22 KiB
Python
Executable File
"""
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OpenWebRX csdr plugin: do the signal processing with csdr
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This file is part of OpenWebRX,
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an open-source SDR receiver software with a web UI.
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Copyright (c) 2013-2015 by Andras Retzler <randras@sdr.hu>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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import subprocess
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import os
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import signal
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import threading
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from functools import partial
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from owrx.wsjt import Ft8Chopper
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import logging
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logger = logging.getLogger(__name__)
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class output(object):
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def add_output(self, type, read_fn):
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pass
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def reset(self):
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pass
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class dsp(object):
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def __init__(self, output):
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self.samp_rate = 250000
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self.output_rate = 11025 #this is default, and cannot be set at the moment
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self.fft_size = 1024
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self.fft_fps = 5
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self.offset_freq = 0
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self.low_cut = -4000
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self.high_cut = 4000
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self.bpf_transition_bw = 320 #Hz, and this is a constant
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self.ddc_transition_bw_rate = 0.15 # of the IF sample rate
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self.running = False
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self.secondary_processes_running = False
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self.audio_compression = "none"
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self.fft_compression = "none"
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self.demodulator = "nfm"
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self.name = "csdr"
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self.base_bufsize = 512
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self.nc_port = 4951
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self.csdr_dynamic_bufsize = False
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self.csdr_print_bufsizes = False
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self.csdr_through = False
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self.squelch_level = 0
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self.fft_averages = 50
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self.iqtee = False
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self.iqtee2 = False
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self.secondary_demodulator = None
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self.secondary_fft_size = 1024
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self.secondary_process_fft = None
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self.secondary_process_demod = None
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self.pipe_names=["bpf_pipe", "shift_pipe", "squelch_pipe", "smeter_pipe", "meta_pipe", "iqtee_pipe",
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"iqtee2_pipe", "dmr_control_pipe"]
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self.secondary_pipe_names=["secondary_shift_pipe"]
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self.secondary_offset_freq = 1000
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self.unvoiced_quality = 1
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self.modification_lock = threading.Lock()
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self.output = output
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def chain(self,which):
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chain = ["nc -v 127.0.0.1 {nc_port}"]
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if self.csdr_dynamic_bufsize: chain += ["csdr setbuf {start_bufsize}"]
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if self.csdr_through: chain += ["csdr through"]
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if which == "fft":
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chain += [
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"csdr fft_cc {fft_size} {fft_block_size}",
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"csdr logpower_cf -70" if self.fft_averages == 0 else "csdr logaveragepower_cf -70 {fft_size} {fft_averages}",
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"csdr fft_exchange_sides_ff {fft_size}"
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]
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if self.fft_compression == "adpcm":
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chain += ["csdr compress_fft_adpcm_f_u8 {fft_size}"]
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return chain
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chain += [
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"csdr shift_addition_cc --fifo {shift_pipe}",
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"csdr fir_decimate_cc {decimation} {ddc_transition_bw} HAMMING",
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"csdr bandpass_fir_fft_cc --fifo {bpf_pipe} {bpf_transition_bw} HAMMING",
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"csdr squelch_and_smeter_cc --fifo {squelch_pipe} --outfifo {smeter_pipe} 5 {smeter_report_every}"
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]
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if self.secondary_demodulator:
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chain += [
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"csdr tee {iqtee_pipe}",
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"csdr tee {iqtee2_pipe}"
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]
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# safe some cpu cycles... no need to decimate if decimation factor is 1
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last_decimation_block = ["csdr fractional_decimator_ff {last_decimation}"] if self.last_decimation != 1.0 else []
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if which == "nfm":
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chain += [
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"csdr fmdemod_quadri_cf",
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"csdr limit_ff"
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]
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chain += last_decimation_block
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chain += [
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"csdr deemphasis_nfm_ff {output_rate}",
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"csdr convert_f_s16"
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]
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elif self.isDigitalVoice(which):
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chain += [
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"csdr fmdemod_quadri_cf",
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"dc_block "
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]
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chain += last_decimation_block
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# dsd modes
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if which in [ "dstar", "nxdn" ]:
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chain += [
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"csdr limit_ff",
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"csdr convert_f_s16"
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]
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if which == "dstar":
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chain += ["dsd -fd -i - -o - -u {unvoiced_quality} -g -1 "]
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elif which == "nxdn":
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chain += ["dsd -fi -i - -o - -u {unvoiced_quality} -g -1 "]
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chain += ["CSDR_FIXED_BUFSIZE=32 csdr convert_s16_f"]
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max_gain = 5
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# digiham modes
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else:
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chain += [
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"rrc_filter",
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"gfsk_demodulator"
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]
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if which == "dmr":
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chain += [
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"dmr_decoder --fifo {meta_pipe} --control-fifo {dmr_control_pipe}",
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"mbe_synthesizer -f -u {unvoiced_quality}"
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]
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elif which == "ysf":
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chain += [
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"ysf_decoder --fifo {meta_pipe}",
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"mbe_synthesizer -y -f -u {unvoiced_quality}"
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]
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max_gain = 0.0005
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chain += [
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"digitalvoice_filter -f",
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"CSDR_FIXED_BUFSIZE=32 csdr agc_ff 160000 0.8 1 0.0000001 {max_gain}".format(max_gain=max_gain),
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"sox -t raw -r 8000 -e floating-point -b 32 -c 1 --buffer 32 - -t raw -r {output_rate} -e signed-integer -b 16 -c 1 - "
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]
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elif which == "am":
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chain += [
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"csdr amdemod_cf",
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"csdr fastdcblock_ff"
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]
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chain += last_decimation_block
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chain += [
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"csdr agc_ff",
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"csdr limit_ff",
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"csdr convert_f_s16"
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]
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elif which == "ssb":
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chain += ["csdr realpart_cf"]
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chain += last_decimation_block
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chain += [
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"csdr agc_ff",
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"csdr limit_ff",
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"csdr convert_f_s16"
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]
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if self.audio_compression=="adpcm":
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chain += ["csdr encode_ima_adpcm_i16_u8"]
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return chain
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def secondary_chain(self, which):
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secondary_chain_base="cat {input_pipe} | "
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if which == "fft":
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return secondary_chain_base+"csdr realpart_cf | csdr fft_fc {secondary_fft_input_size} {secondary_fft_block_size} | csdr logpower_cf -70 " + (" | csdr compress_fft_adpcm_f_u8 {secondary_fft_size}" if self.fft_compression=="adpcm" else "")
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elif which == "bpsk31":
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return secondary_chain_base + "csdr shift_addition_cc --fifo {secondary_shift_pipe} | " + \
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"csdr bandpass_fir_fft_cc -{secondary_bpf_cutoff} {secondary_bpf_cutoff} {secondary_bpf_cutoff} | " + \
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"csdr simple_agc_cc 0.001 0.5 | " + \
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"csdr timing_recovery_cc GARDNER {secondary_samples_per_bits} 0.5 2 --add_q | " + \
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"CSDR_FIXED_BUFSIZE=1 csdr dbpsk_decoder_c_u8 | " + \
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"CSDR_FIXED_BUFSIZE=1 csdr psk31_varicode_decoder_u8_u8"
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elif which == "ft8":
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chain = secondary_chain_base + "csdr realpart_cf | "
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if self.last_decimation != 1.0 :
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chain += "csdr fractional_decimator_ff {last_decimation} | "
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chain += "csdr agc_ff | csdr limit_ff | csdr convert_f_s16"
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return chain
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def set_secondary_demodulator(self, what):
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if self.get_secondary_demodulator() == what:
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return
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self.secondary_demodulator = what
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self.restart()
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def secondary_fft_block_size(self):
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return (self.samp_rate/self.decimation)/(self.fft_fps*2) #*2 is there because we do FFT on real signal here
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def secondary_decimation(self):
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return 1 #currently unused
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def secondary_bpf_cutoff(self):
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if self.secondary_demodulator == "bpsk31":
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return 31.25 / self.if_samp_rate()
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return 0
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def secondary_bpf_transition_bw(self):
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if self.secondary_demodulator == "bpsk31":
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return 31.25 / self.if_samp_rate()
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return 0
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def secondary_samples_per_bits(self):
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if self.secondary_demodulator == "bpsk31":
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return int(round(self.if_samp_rate()/31.25))&~3
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return 0
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def secondary_bw(self):
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if self.secondary_demodulator == "bpsk31":
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return 31.25
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def start_secondary_demodulator(self):
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if not self.secondary_demodulator: return
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logger.debug("[openwebrx] starting secondary demodulator from IF input sampled at %d"%self.if_samp_rate())
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secondary_command_fft=self.secondary_chain("fft")
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secondary_command_demod=self.secondary_chain(self.secondary_demodulator)
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self.try_create_pipes(self.secondary_pipe_names, secondary_command_demod + secondary_command_fft)
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secondary_command_fft=secondary_command_fft.format(
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input_pipe=self.iqtee_pipe,
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secondary_fft_input_size=self.secondary_fft_size,
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secondary_fft_size=self.secondary_fft_size,
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secondary_fft_block_size=self.secondary_fft_block_size(),
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)
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secondary_command_demod=secondary_command_demod.format(
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input_pipe=self.iqtee2_pipe,
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secondary_shift_pipe=self.secondary_shift_pipe,
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secondary_decimation=self.secondary_decimation(),
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secondary_samples_per_bits=self.secondary_samples_per_bits(),
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secondary_bpf_cutoff=self.secondary_bpf_cutoff(),
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secondary_bpf_transition_bw=self.secondary_bpf_transition_bw(),
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if_samp_rate=self.if_samp_rate(),
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last_decimation=self.last_decimation
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)
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logger.debug("[openwebrx-dsp-plugin:csdr] secondary command (fft) = %s", secondary_command_fft)
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logger.debug("[openwebrx-dsp-plugin:csdr] secondary command (demod) = %s", secondary_command_demod)
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my_env=os.environ.copy()
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#if self.csdr_dynamic_bufsize: my_env["CSDR_DYNAMIC_BUFSIZE_ON"]="1";
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if self.csdr_print_bufsizes: my_env["CSDR_PRINT_BUFSIZES"]="1";
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self.secondary_process_fft = subprocess.Popen(secondary_command_fft, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setpgrp, env=my_env)
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logger.debug("[openwebrx-dsp-plugin:csdr] Popen on secondary command (fft)")
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self.secondary_process_demod = subprocess.Popen(secondary_command_demod, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setpgrp, env=my_env) #TODO digimodes
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logger.debug("[openwebrx-dsp-plugin:csdr] Popen on secondary command (demod)") #TODO digimodes
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self.secondary_processes_running = True
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self.output.add_output("secondary_fft", partial(self.secondary_process_fft.stdout.read, int(self.get_secondary_fft_bytes_to_read())))
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if self.get_secondary_demodulator() == "ft8":
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chopper = Ft8Chopper(self.secondary_process_demod.stdout)
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chopper.start()
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else:
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self.output.add_output("secondary_demod", partial(self.secondary_process_demod.stdout.read, 1))
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#open control pipes for csdr and send initialization data
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if self.secondary_shift_pipe != None: #TODO digimodes
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self.secondary_shift_pipe_file=open(self.secondary_shift_pipe,"w") #TODO digimodes
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self.set_secondary_offset_freq(self.secondary_offset_freq) #TODO digimodes
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def set_secondary_offset_freq(self, value):
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self.secondary_offset_freq=value
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if self.secondary_processes_running and hasattr(self, "secondary_shift_pipe_file"):
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self.secondary_shift_pipe_file.write("%g\n"%(-float(self.secondary_offset_freq)/self.if_samp_rate()))
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self.secondary_shift_pipe_file.flush()
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def stop_secondary_demodulator(self):
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if self.secondary_processes_running == False: return
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self.try_delete_pipes(self.secondary_pipe_names)
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if self.secondary_process_fft:
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try:
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os.killpg(os.getpgid(self.secondary_process_fft.pid), signal.SIGTERM)
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except ProcessLookupError:
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# been killed by something else, ignore
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pass
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if self.secondary_process_demod:
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try:
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os.killpg(os.getpgid(self.secondary_process_demod.pid), signal.SIGTERM)
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except ProcessLookupError:
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# been killed by something else, ignore
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pass
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self.secondary_processes_running = False
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def get_secondary_demodulator(self):
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return self.secondary_demodulator
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def set_secondary_fft_size(self,secondary_fft_size):
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#to change this, restart is required
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self.secondary_fft_size=secondary_fft_size
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def set_audio_compression(self,what):
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self.audio_compression = what
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def set_fft_compression(self,what):
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self.fft_compression = what
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def get_fft_bytes_to_read(self):
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if self.fft_compression=="none": return self.fft_size*4
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if self.fft_compression=="adpcm": return (self.fft_size/2)+(10/2)
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def get_secondary_fft_bytes_to_read(self):
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if self.fft_compression=="none": return self.secondary_fft_size*4
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if self.fft_compression=="adpcm": return (self.secondary_fft_size/2)+(10/2)
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def set_samp_rate(self,samp_rate):
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self.samp_rate=samp_rate
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self.calculate_decimation()
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if self.running: self.restart()
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def calculate_decimation(self):
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(self.decimation, self.last_decimation, _) = self.get_decimation(self.samp_rate, self.get_audio_rate())
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def get_decimation(self, input_rate, output_rate):
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decimation=1
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while input_rate / (decimation+1) >= output_rate:
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decimation += 1
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fraction = float(input_rate / decimation) / output_rate
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intermediate_rate = input_rate / decimation
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return (decimation, fraction, intermediate_rate)
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def if_samp_rate(self):
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return self.samp_rate/self.decimation
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def get_name(self):
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return self.name
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def get_output_rate(self):
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return self.output_rate
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def get_audio_rate(self):
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if self.isDigitalVoice():
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return 48000
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elif self.secondary_demodulator == "ft8":
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return 12000
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return self.get_output_rate()
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def isDigitalVoice(self, demodulator = None):
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if demodulator is None:
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demodulator = self.get_demodulator()
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return demodulator in ["dmr", "dstar", "nxdn", "ysf"]
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def set_output_rate(self,output_rate):
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self.output_rate=output_rate
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self.calculate_decimation()
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def set_demodulator(self,demodulator):
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if (self.demodulator == demodulator): return
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self.demodulator=demodulator
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self.calculate_decimation()
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self.restart()
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def get_demodulator(self):
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return self.demodulator
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def set_fft_size(self,fft_size):
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self.fft_size=fft_size
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self.restart()
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def set_fft_fps(self,fft_fps):
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self.fft_fps=fft_fps
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self.restart()
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def set_fft_averages(self,fft_averages):
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self.fft_averages=fft_averages
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self.restart()
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def fft_block_size(self):
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if self.fft_averages == 0: return self.samp_rate/self.fft_fps
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else: return self.samp_rate/self.fft_fps/self.fft_averages
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def set_offset_freq(self,offset_freq):
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self.offset_freq=offset_freq
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if self.running:
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self.modification_lock.acquire()
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self.shift_pipe_file.write("%g\n"%(-float(self.offset_freq)/self.samp_rate))
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self.shift_pipe_file.flush()
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self.modification_lock.release()
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def set_bpf(self,low_cut,high_cut):
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self.low_cut=low_cut
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self.high_cut=high_cut
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if self.running:
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self.modification_lock.acquire()
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self.bpf_pipe_file.write( "%g %g\n"%(float(self.low_cut)/self.if_samp_rate(), float(self.high_cut)/self.if_samp_rate()) )
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self.bpf_pipe_file.flush()
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self.modification_lock.release()
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def get_bpf(self):
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return [self.low_cut, self.high_cut]
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def set_squelch_level(self, squelch_level):
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self.squelch_level=squelch_level
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#no squelch required on digital voice modes
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actual_squelch = 0 if self.isDigitalVoice() else self.squelch_level
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if self.running:
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self.modification_lock.acquire()
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self.squelch_pipe_file.write("%g\n"%(float(actual_squelch)))
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self.squelch_pipe_file.flush()
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self.modification_lock.release()
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def set_unvoiced_quality(self, q):
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self.unvoiced_quality = q
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self.restart()
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def get_unvoiced_quality(self):
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return self.unvoiced_quality
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def set_dmr_filter(self, filter):
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if self.dmr_control_pipe_file:
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self.dmr_control_pipe_file.write("{0}\n".format(filter))
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self.dmr_control_pipe_file.flush()
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def mkfifo(self,path):
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try:
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os.unlink(path)
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except:
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pass
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os.mkfifo(path)
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def ddc_transition_bw(self):
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return self.ddc_transition_bw_rate*(self.if_samp_rate()/float(self.samp_rate))
|
|
|
|
def try_create_pipes(self, pipe_names, command_base):
|
|
for pipe_name in pipe_names:
|
|
if "{"+pipe_name+"}" in command_base:
|
|
setattr(self, pipe_name, self.pipe_base_path+pipe_name)
|
|
self.mkfifo(getattr(self, pipe_name))
|
|
else:
|
|
setattr(self, pipe_name, None)
|
|
|
|
def try_delete_pipes(self, pipe_names):
|
|
for pipe_name in pipe_names:
|
|
pipe_path = getattr(self,pipe_name,None)
|
|
if pipe_path:
|
|
try: os.unlink(pipe_path)
|
|
except Exception:
|
|
logger.exception("try_delete_pipes()")
|
|
|
|
def start(self):
|
|
self.modification_lock.acquire()
|
|
if (self.running):
|
|
self.modification_lock.release()
|
|
return
|
|
self.running = True
|
|
|
|
command_base = " | ".join(self.chain(self.demodulator))
|
|
logger.debug(command_base)
|
|
|
|
#create control pipes for csdr
|
|
self.pipe_base_path="/tmp/openwebrx_pipe_{myid}_".format(myid=id(self))
|
|
|
|
self.try_create_pipes(self.pipe_names, command_base)
|
|
|
|
#run the command
|
|
command=command_base.format( bpf_pipe=self.bpf_pipe, shift_pipe=self.shift_pipe, decimation=self.decimation,
|
|
last_decimation=self.last_decimation, fft_size=self.fft_size, fft_block_size=self.fft_block_size(), fft_averages=self.fft_averages,
|
|
bpf_transition_bw=float(self.bpf_transition_bw)/self.if_samp_rate(), ddc_transition_bw=self.ddc_transition_bw(),
|
|
flowcontrol=int(self.samp_rate*2), start_bufsize=self.base_bufsize*self.decimation, nc_port=self.nc_port,
|
|
squelch_pipe=self.squelch_pipe, smeter_pipe=self.smeter_pipe, meta_pipe=self.meta_pipe, iqtee_pipe=self.iqtee_pipe, iqtee2_pipe=self.iqtee2_pipe,
|
|
output_rate = self.get_output_rate(), smeter_report_every = int(self.if_samp_rate()/6000),
|
|
unvoiced_quality = self.get_unvoiced_quality(), dmr_control_pipe = self.dmr_control_pipe)
|
|
|
|
logger.debug("[openwebrx-dsp-plugin:csdr] Command = %s", command)
|
|
my_env=os.environ.copy()
|
|
if self.csdr_dynamic_bufsize: my_env["CSDR_DYNAMIC_BUFSIZE_ON"]="1";
|
|
if self.csdr_print_bufsizes: my_env["CSDR_PRINT_BUFSIZES"]="1";
|
|
self.process = subprocess.Popen(command, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setpgrp, env=my_env)
|
|
|
|
def watch_thread():
|
|
rc = self.process.wait()
|
|
logger.debug("dsp thread ended with rc=%d", rc)
|
|
if (rc == 0 and self.running and not self.modification_lock.locked()):
|
|
logger.debug("restarting since rc = 0, self.running = true, and no modification")
|
|
self.restart()
|
|
|
|
threading.Thread(target = watch_thread).start()
|
|
|
|
self.output.add_output("audio", partial(self.process.stdout.read, int(self.get_fft_bytes_to_read()) if self.demodulator == "fft" else 256))
|
|
|
|
# open control pipes for csdr
|
|
if self.bpf_pipe:
|
|
self.bpf_pipe_file = open(self.bpf_pipe, "w")
|
|
if self.shift_pipe:
|
|
self.shift_pipe_file = open(self.shift_pipe, "w")
|
|
if self.squelch_pipe:
|
|
self.squelch_pipe_file = open(self.squelch_pipe, "w")
|
|
self.start_secondary_demodulator()
|
|
|
|
self.modification_lock.release()
|
|
|
|
# send initial config through the pipes
|
|
if self.squelch_pipe:
|
|
self.set_squelch_level(self.squelch_level)
|
|
if self.shift_pipe:
|
|
self.set_offset_freq(self.offset_freq)
|
|
if self.bpf_pipe:
|
|
self.set_bpf(self.low_cut, self.high_cut)
|
|
if self.smeter_pipe:
|
|
self.smeter_pipe_file=open(self.smeter_pipe,"r")
|
|
def read_smeter():
|
|
raw = self.smeter_pipe_file.readline()
|
|
if len(raw) == 0:
|
|
return None
|
|
else:
|
|
return float(raw.rstrip("\n"))
|
|
self.output.add_output("smeter", read_smeter)
|
|
if self.meta_pipe != None:
|
|
# TODO make digiham output unicode and then change this here
|
|
self.meta_pipe_file=open(self.meta_pipe, "r", encoding="cp437")
|
|
def read_meta():
|
|
raw = self.meta_pipe_file.readline()
|
|
if len(raw) == 0:
|
|
return None
|
|
else:
|
|
return raw.rstrip("\n")
|
|
self.output.add_output("meta", read_meta)
|
|
|
|
if self.dmr_control_pipe:
|
|
self.dmr_control_pipe_file = open(self.dmr_control_pipe, "w")
|
|
|
|
def stop(self):
|
|
self.modification_lock.acquire()
|
|
self.running = False
|
|
if hasattr(self, "process"):
|
|
try:
|
|
os.killpg(os.getpgid(self.process.pid), signal.SIGTERM)
|
|
except ProcessLookupError:
|
|
# been killed by something else, ignore
|
|
pass
|
|
self.stop_secondary_demodulator()
|
|
|
|
self.try_delete_pipes(self.pipe_names)
|
|
|
|
self.modification_lock.release()
|
|
|
|
def restart(self):
|
|
if not self.running: return
|
|
self.stop()
|
|
self.start()
|
|
|
|
def __del__(self):
|
|
self.stop()
|
|
del(self.process)
|