54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
from abc import ABCMeta
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from . import SdrSource
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import logging
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logger = logging.getLogger(__name__)
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class DirectSource(SdrSource, metaclass=ABCMeta):
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def onPropertyChange(self, changes):
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logger.debug("restarting sdr source due to property changes: {0}".format(changes))
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self.stop()
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self.sleepOnRestart()
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self.start()
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def getEventNames(self):
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return super().getEventNames() + [
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"nmux_memory",
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]
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def getNmuxCommand(self):
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props = self.sdrProps
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nmux_bufcnt = nmux_bufsize = 0
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while nmux_bufsize < props["samp_rate"] / 4:
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nmux_bufsize += 4096
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while nmux_bufsize * nmux_bufcnt < props["nmux_memory"] * 1e6:
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nmux_bufcnt += 1
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if nmux_bufcnt == 0 or nmux_bufsize == 0:
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raise ValueError(
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"Error: nmux_bufsize or nmux_bufcnt is zero. "
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"These depend on nmux_memory and samp_rate options in config_webrx.py"
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)
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return [
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"nmux --bufsize %d --bufcnt %d --port %d --address 127.0.0.1"
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% (
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nmux_bufsize,
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nmux_bufcnt,
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self.port,
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)
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]
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def getCommand(self):
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return super().getCommand() + self.getFormatConversion() + self.getNmuxCommand()
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# override this in subclasses, if necessary
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def getFormatConversion(self):
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return []
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# override this in subclasses, if necessary
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def sleepOnRestart(self):
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pass
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