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