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initial work on freedv / codec2 support, refs #126

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This commit is contained in:
Jakob Ketterl
2020-07-28 00:28:20 +02:00
parent 9b187140ff
commit 7e5409160e
3 changed files with 17 additions and 1 deletions
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13
csdr/csdr.py
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@ -301,6 +301,15 @@ class dsp(object):
chain += ["csdr amdemod_cf", "csdr fastdcblock_ff"]
chain += last_decimation_block
chain += ["csdr agc_ff", "csdr limit_ff", "csdr convert_f_s16"]
elif which == "freedv":
chain += ["csdr realpart_cf"]
chain += last_decimation_block
chain += [
"csdr agc_ff",
"csdr convert_f_s16",
"freedv_rx 1600 - -",
"sox -t raw -r 8000 -e signed-integer -b 16 -c 1 --buffer 32 - -t raw -r {output_rate} -e signed-integer -b 16 -c 1 - ",
]
elif which == "ssb":
chain += ["csdr realpart_cf"]
chain += last_decimation_block
@ -571,6 +580,8 @@ class dsp(object):
return 48000
elif self.isWsjtMode() or self.isJs8():
return 12000
elif self.get_demodulator() == "freedv":
return 8000
return self.get_output_rate()
def isDigitalVoice(self, demodulator=None):
@ -664,7 +675,7 @@ class dsp(object):
def set_squelch_level(self, squelch_level):
self.squelch_level = squelch_level
# no squelch required on digital voice modes
actual_squelch = -150 if self.isDigitalVoice() or self.isPacket() or self.isPocsag() else self.squelch_level
actual_squelch = -150 if self.isDigitalVoice() or self.isPacket() or self.isPocsag() or self.get_demodulator() == "freedv" else self.squelch_level
if self.running:
self.pipes["squelch_pipe"].write("%g\n" % (self.convertToLinear(actual_squelch)))