101 lines
3.2 KiB
Python
101 lines
3.2 KiB
Python
import os
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import subprocess
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from functools import reduce
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from operator import and_
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import logging
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logger = logging.getLogger(__name__)
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class UnknownFeatureException(Exception):
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pass
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class FeatureDetector(object):
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features = {
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"core": [ "csdr", "nmux" ],
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"rtl_sdr": [ "rtl_sdr" ],
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"sdrplay": [ "rx_tools" ],
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"hackrf": [ "hackrf_transfer" ],
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"digital_voice_digiham": [ "digiham", "sox" ],
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"digital_voice_dsd": [ "dsd", "sox" ]
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}
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def feature_availability(self):
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return {name: self.is_available(name) for name in FeatureDetector.features}
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def is_available(self, feature):
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return self.has_requirements(self.get_requirements(feature))
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def get_requirements(self, feature):
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try:
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return FeatureDetector.features[feature]
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except KeyError:
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raise UnknownFeatureException("Feature \"{0}\" is not known.".format(feature))
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def has_requirements(self, requirements):
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passed = True
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for requirement in requirements:
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methodname = "has_" + requirement
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if hasattr(self, methodname) and callable(getattr(self, methodname)):
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passed = passed and getattr(self, methodname)()
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else:
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logger.error("detection of requirement {0} not implement. please fix in code!".format(requirement))
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return passed
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def command_is_runnable(self, command):
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return os.system("{0} 2>/dev/null >/dev/null".format(command)) != 32512
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def has_csdr(self):
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return self.command_is_runnable("csdr")
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def has_nmux(self):
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return self.command_is_runnable("nmux --help")
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def has_rtl_sdr(self):
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return self.command_is_runnable("rtl_sdr --help")
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def has_rx_tools(self):
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return self.command_is_runnable("rx_sdr --help")
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"""
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To use a HackRF, compile the HackRF host tools from its "stdout" branch:
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git clone https://github.com/mossmann/hackrf/
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cd hackrf
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git fetch
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git checkout origin/stdout
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cd host
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mkdir build
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cd build
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cmake .. -DINSTALL_UDEV_RULES=ON
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make
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sudo make install
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"""
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def has_hackrf_transfer(self):
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# TODO i don't have a hackrf, so somebody doublecheck this.
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# TODO also check if it has the stdout feature
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return self.command_is_runnable("hackrf_transfer --help")
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def command_exists(self, command):
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return os.system("which {0}".format(command)) == 0
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def has_digiham(self):
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# the digiham tools expect to be fed via stdin, they will block until their stdin is closed.
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def check_with_stdin(command):
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try:
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process = subprocess.Popen(command, stdin=subprocess.PIPE)
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process.communicate("")
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return process.wait() == 0
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except FileNotFoundError:
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return False
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return reduce(and_,
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map(
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check_with_stdin,
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["rrc_filter", "ysf_decoder", "dmr_decoder", "mbe_synthesizer"]
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),
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True)
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def has_dsd(self):
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return self.command_is_runnable("dsd")
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def has_sox(self):
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return self.command_is_runnable("sox") |