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DJ2LS 2020-12-20 16:41:34 +01:00 committed by GitHub
parent 37c367c7b8
commit 90785dee85
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1 changed files with 64 additions and 48 deletions
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112
test/TEST_RX.py
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@ -13,25 +13,20 @@ import pathlib
import binascii #required for string.to_bytes() function
import sys
import audioop
import base64
def main():
modem = FreeDV() #Load FreeDV Class as "modem"
#data = b'TEST' #byte string which will be send
#data = sys.stdin.read()
modem.Demodulate()
#for line in sys.stdin.buffer:
# print(line)
# data = sys.stdin.buffer.read()
#data = sys.stdin.flush()
#data = audioop.ratecv(data,2,1,48000, 8000, None)
#print(data)
# demodulated_data = modem.Demodulate(data) #Call Modulate function, which modulates data and prints it to the terminal
# #print(line)
# modem.Demodulate(line)
data = sys.stdin.buffer.read()
demodulated_data = modem.Demodulate(data)
class FreeDV():
@ -45,11 +40,13 @@ class FreeDV():
self.bytes_per_frame = int(self.c_lib.freedv_get_bits_per_modem_frame(self.freedv)/8) #get bytes per frame from selected waveform
self.payload_per_frame = self.bytes_per_frame -2 #get frame payload because of 2byte CRC16 checksum
self.n_max_modem_samples = self.c_lib.freedv_get_n_max_modem_samples(self.freedv)
self.n_max_modem_samples = self.c_lib.freedv_get_n_max_modem_samples(self.freedv)
self.nin = self.c_lib.freedv_nin(self.freedv)
print("N MAX MODEM SAMPLES: " + str(self.n_max_modem_samples))
print("NIN: " + str(self.nin))
print("BYTES PER FRAME: " + str(self.bytes_per_frame))
# MODULATION-IN OBJECT
def ModulationIn(self):
return (c_short * self.n_max_modem_samples) ##
@ -58,36 +55,55 @@ class FreeDV():
# Pointer for changing buffer data type
def FrameBytes(self):
return (c_ubyte * self.bytes_per_frame)
# Modulate function which returns modulated data
def Demodulate(self,data_in):
buffer = bytearray(len(self.ModulationIn()())*sizeof(c_short)) # create empty byte array
#buffer = bytearray(40000)
buffer[:len(data_in)] = data_in # copy across what we have
modulation = self.ModulationIn() # get an empty modulation array
modulation = modulation.from_buffer_copy(buffer) # copy buffer across and get a pointer to it.
#print(bytes(modulation))
bytes_out = self.FrameBytes()() # initilize a pointer to where bytes will be outputed
#print(data_in)
nbytes = self.c_lib.freedv_rawdatarx(self.freedv, bytes_out, data_in)
nin = self.c_lib.freedv_nin(self.freedv)
#print(len(modulation))
#print(len(data_in))
#print(len(buffer))
#print(self.n_max_modem_samples)
#print(nin)
print(self.c_lib.freedv_get_sync(self.freedv))
if nbytes != 0:
print(bytes(bytes_out))
#return (c_ubyte * 2)
print(bytes(bytes_out))
#print(nbytes)
#print(self.c_lib.freedv_get_total_bits_coded(self.freedv))
#print(self.c_lib.freedv_get_total_bit_errors_coded(self.freedv))
main()
# Modulate function which returns modulated data
def Demodulate(self):
nin = self.c_lib.freedv_nin(self.freedv)
while self.c_lib.freedv_nin(self.freedv) == nin:
#nin = self.c_lib.freedv_nin(self.freedv)
#print(nin)
samples = self.c_lib.freedv_nin(self.freedv) ### MIT DER *2 funktioniert das irgendwie recht zuverlässig bei mode 5!
print(samples)
data_in = sys.stdin.buffer.read(samples)
#buffer = bytearray(len(self.ModulationIn()())*sizeof(c_short)) # create empty byte array
#buffer = bytearray(len(self.ModulationIn()())*self.n_max_modem_samples) # create empty byte array
buffer = bytearray(1848) # N MAX SAMPLES * 2
print("BUFFER LENGTH: " + str(len(buffer)))
buffer[:len(data_in)] = data_in # copy across what we have
modulation = self.ModulationIn() # get an empty modulation array
modulation = modulation.from_buffer_copy(buffer) # copy buffer across and get a pointer to it.
print("MODULATION LENGTH: " + str(len(modulation)))
bytes_out = self.FrameBytes()() # initilize a pointer to where bytes will be outputed
nbytes = self.c_lib.freedv_rawdatarx(self.freedv, bytes_out, data_in)
if nbytes > 0:
print(bytes(bytes_out))
#print(nbytes)
main()