mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
Delete modem.py
This commit is contained in:
parent
d81d1e49e5
commit
6ad66452c7
1 changed files with 0 additions and 355 deletions
355
modem.py
355
modem.py
|
@ -1,355 +0,0 @@
|
|||
#!/usr/bin/env python3
|
||||
# -*- coding: utf-8 -*-
|
||||
"""
|
||||
Created on Wed Dec 23 07:04:24 2020
|
||||
|
||||
@author: DJ2LS
|
||||
"""
|
||||
|
||||
import ctypes
|
||||
from ctypes import *
|
||||
import pathlib
|
||||
import pyaudio
|
||||
import sys
|
||||
import logging
|
||||
import time
|
||||
import threading
|
||||
|
||||
import helpers
|
||||
import static
|
||||
import arq
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
class RF():
|
||||
|
||||
def __init__(self):
|
||||
#-------------------------------------------- LOAD FREEDV
|
||||
libname = pathlib.Path().absolute() / "codec2/build_linux/src/libcodec2.so"
|
||||
self.c_lib = ctypes.CDLL(libname)
|
||||
#--------------------------------------------CREATE PYAUDIO INSTANCE
|
||||
self.p = pyaudio.PyAudio()
|
||||
#--------------------------------------------GET SUPPORTED SAMPLE RATES FROM SOUND DEVICE
|
||||
#static.AUDIO_SAMPLE_RATE_RX = int(self.p.get_device_info_by_index(static.AUDIO_INPUT_DEVICE)['defaultSampleRate'])
|
||||
#static.AUDIO_SAMPLE_RATE_TX = int(self.p.get_device_info_by_index(static.AUDIO_OUTPUT_DEVICE)['defaultSampleRate'])
|
||||
static.AUDIO_SAMPLE_RATE_TX = 8000
|
||||
static.AUDIO_SAMPLE_RATE_RX = 8000
|
||||
#--------------------------------------------OPEN AUDIO CHANNEL RX
|
||||
self.stream_rx = self.p.open(format=pyaudio.paInt16,
|
||||
channels=static.AUDIO_CHANNELS,
|
||||
rate=static.AUDIO_SAMPLE_RATE_RX,
|
||||
frames_per_buffer=static.AUDIO_FRAMES_PER_BUFFER,
|
||||
input=True,
|
||||
input_device_index=static.AUDIO_INPUT_DEVICE,
|
||||
)
|
||||
#--------------------------------------------OPEN AUDIO CHANNEL TX
|
||||
self.stream_tx = self.p.open(format=pyaudio.paInt16,
|
||||
channels=1,
|
||||
rate=static.AUDIO_SAMPLE_RATE_TX,
|
||||
frames_per_buffer=static.AUDIO_FRAMES_PER_BUFFER, #n_nom_modem_samples
|
||||
output=True,
|
||||
output_device_index=static.AUDIO_OUTPUT_DEVICE, #static.AUDIO_OUTPUT_DEVICE
|
||||
)
|
||||
#--------------------------------------------START DECODER THREAD
|
||||
FREEDV_DECODER_THREAD = threading.Thread(target=self.receive, args=[static.FREEDV_DATA_MODE,static.FREEDV_SIGNALLING_MODE], name="FREEDV_DECODER_THREAD")
|
||||
FREEDV_DECODER_THREAD.start()
|
||||
|
||||
#--------------------------------------------------------------------------------------------------------
|
||||
def transmit_arq_ack(self,ack_buffer):
|
||||
#print(ack_buffer)
|
||||
static.ARQ_STATE = 'SENDING_ACK'
|
||||
|
||||
self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
|
||||
freedv = self.c_lib.freedv_open(static.FREEDV_SIGNALLING_MODE)
|
||||
bytes_per_frame = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv)/8)
|
||||
payload_per_frame = bytes_per_frame -2
|
||||
n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(freedv)
|
||||
n_tx_modem_samples = self.c_lib.freedv_get_n_tx_modem_samples(freedv)*2 #get n_tx_modem_samples which defines the size of the modulation object
|
||||
|
||||
mod_out = ctypes.c_short * n_tx_modem_samples
|
||||
mod_out = mod_out()
|
||||
mod_out_preamble = ctypes.c_short * (1760*2) #1760 for mode 10,11,12 #4000 for mode 9
|
||||
mod_out_preamble = mod_out_preamble()
|
||||
|
||||
buffer = bytearray(payload_per_frame) # use this if CRC16 checksum is required ( DATA1-3)
|
||||
buffer[:len(ack_buffer)] = ack_buffer # set buffersize to length of data which will be send
|
||||
|
||||
crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), payload_per_frame)) # generate CRC16
|
||||
crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
|
||||
buffer += crc # append crc16 to buffer
|
||||
data = (ctypes.c_ubyte * bytes_per_frame).from_buffer_copy(buffer)
|
||||
|
||||
preamble_bytes = self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble)
|
||||
self.c_lib.freedv_rawdatatx(freedv,mod_out,data) # modulate DATA and safe it into mod_out pointer
|
||||
txbuffer = bytearray()
|
||||
txbuffer += bytes(mod_out_preamble)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
txbuffer += bytes(mod_out)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
|
||||
# -------------- transmit audio twice
|
||||
|
||||
print("SEND SIGNALLING FRAME...................................")
|
||||
print(ack_buffer)
|
||||
self.stream_tx.write(bytes(txbuffer))
|
||||
print("........................................................")
|
||||
self.stream_tx.write(bytes(txbuffer))
|
||||
|
||||
print("...................................DONE!")
|
||||
|
||||
static.ARQ_STATE = 'RECEIVING_DATA'
|
||||
#--------------------------------------------------------------------------------------------------------
|
||||
# GET ARQ BURST FRAME VOM BUFFER AND MODULATE IT
|
||||
def transmit_arq_burst(self):
|
||||
static.ARQ_STATE = 'SENDING_DATA'
|
||||
|
||||
self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
|
||||
freedv = self.c_lib.freedv_open(static.FREEDV_DATA_MODE)
|
||||
static.FREEDV_DATA_BYTES_PER_FRAME = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv)/8)
|
||||
static.FREEDV_DATA_PAYLOAD_PER_FRAME = static.FREEDV_DATA_BYTES_PER_FRAME -2
|
||||
|
||||
n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(freedv)
|
||||
n_tx_modem_samples = self.c_lib.freedv_get_n_tx_modem_samples(freedv)*2 #get n_tx_modem_samples which defines the size of the modulation object
|
||||
|
||||
mod_out = ctypes.c_short * n_tx_modem_samples
|
||||
mod_out = mod_out()
|
||||
mod_out_preamble = ctypes.c_short * (n_tx_modem_samples*2) #1760 for mode 10,11,12 #4000 for mode 9
|
||||
mod_out_preamble = mod_out_preamble()
|
||||
|
||||
self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble);
|
||||
txbuffer = bytearray()
|
||||
txbuffer += bytes(mod_out_preamble)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
|
||||
if static.ARQ_RPT_RECEIVED == False:
|
||||
for n in range(0,static.ARQ_TX_N_FRAMES_PER_BURST):
|
||||
|
||||
#---------------------------BUILD ARQ BURST ---------------------------------------------------------------------
|
||||
frame_type = 10 + n + 1 #static.ARQ_TX_N_FRAMES_PER_BURST
|
||||
frame_type = bytes([frame_type])
|
||||
|
||||
payload_data = bytes(static.TX_BUFFER[static.ARQ_N_SENT_FRAMES + n])
|
||||
|
||||
n_current_arq_frame = static.ARQ_N_SENT_FRAMES + n + 1
|
||||
static.ARQ_TX_N_CURRENT_ARQ_FRAME = n_current_arq_frame.to_bytes(2, byteorder='big')
|
||||
|
||||
n_total_arq_frame = len(static.TX_BUFFER)
|
||||
static.ARQ_TX_N_TOTAL_ARQ_FRAMES = n_total_arq_frame.to_bytes(2, byteorder='big')
|
||||
|
||||
arqframe = frame_type + \
|
||||
bytes([static.ARQ_TX_N_FRAMES_PER_BURST]) + \
|
||||
static.ARQ_TX_N_CURRENT_ARQ_FRAME + \
|
||||
static.ARQ_TX_N_TOTAL_ARQ_FRAMES + \
|
||||
static.DXCALLSIGN_CRC8 + \
|
||||
static.MYCALLSIGN_CRC8 + \
|
||||
payload_data
|
||||
|
||||
#print(arqframe)
|
||||
|
||||
buffer = bytearray(static.FREEDV_DATA_PAYLOAD_PER_FRAME) # create TX buffer
|
||||
buffer[:len(arqframe)] = arqframe # set buffersize to length of data which will be send
|
||||
|
||||
crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), static.FREEDV_DATA_PAYLOAD_PER_FRAME)) # generate CRC16
|
||||
crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
|
||||
buffer += crc # append crc16 to buffer
|
||||
|
||||
data = (ctypes.c_ubyte * static.FREEDV_DATA_BYTES_PER_FRAME).from_buffer_copy(buffer)
|
||||
self.c_lib.freedv_rawdatatx(freedv,mod_out,data) # modulate DATA and safe it into mod_out pointer
|
||||
txbuffer += bytes(mod_out)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
|
||||
elif static.ARQ_RPT_RECEIVED == True:
|
||||
|
||||
for n in range(0,len(static.ARQ_RPT_FRAMES)):
|
||||
|
||||
missing_frame = int.from_bytes(static.ARQ_RPT_FRAMES[n], "big")
|
||||
|
||||
#---------------------------BUILD ARQ BURST ---------------------------------------------------------------------
|
||||
frame_type = 10 + missing_frame #static.ARQ_TX_N_FRAMES_PER_BURST
|
||||
frame_type = bytes([frame_type])
|
||||
|
||||
payload_data = bytes(static.TX_BUFFER[static.ARQ_N_SENT_FRAMES + missing_frame - 1])
|
||||
|
||||
n_current_arq_frame = static.ARQ_N_SENT_FRAMES + missing_frame
|
||||
static.ARQ_TX_N_CURRENT_ARQ_FRAME = n_current_arq_frame.to_bytes(2, byteorder='big')
|
||||
|
||||
n_total_arq_frame = len(static.TX_BUFFER)
|
||||
static.ARQ_TX_N_TOTAL_ARQ_FRAMES = n_total_arq_frame.to_bytes(2, byteorder='big')
|
||||
|
||||
arqframe = frame_type + \
|
||||
bytes([static.ARQ_TX_N_FRAMES_PER_BURST]) + \
|
||||
static.ARQ_TX_N_CURRENT_ARQ_FRAME + \
|
||||
static.ARQ_TX_N_TOTAL_ARQ_FRAMES + \
|
||||
static.DXCALLSIGN_CRC8 + \
|
||||
static.MYCALLSIGN_CRC8 + \
|
||||
payload_data
|
||||
|
||||
buffer = bytearray(static.FREEDV_DATA_PAYLOAD_PER_FRAME) # create TX buffer
|
||||
buffer[:len(arqframe)] = arqframe # set buffersize to length of data which will be send
|
||||
|
||||
crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), static.FREEDV_DATA_PAYLOAD_PER_FRAME)) # generate CRC16
|
||||
crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
|
||||
buffer += crc # append crc16 to buffer
|
||||
|
||||
data = (ctypes.c_ubyte * static.FREEDV_DATA_BYTES_PER_FRAME).from_buffer_copy(buffer)
|
||||
self.c_lib.freedv_rawdatatx(freedv,mod_out,data) # modulate DATA and safe it into mod_out pointer
|
||||
txbuffer += bytes(mod_out)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
|
||||
|
||||
# -------------- transmit audio
|
||||
self.stream_tx.write(bytes(txbuffer))
|
||||
#time.sleep(0.5)
|
||||
static.ARQ_STATE = 'IDLE'
|
||||
#static.ARQ_STATE = 'RECEIVING_SIGNALLING'
|
||||
|
||||
#--------------------------------------------------------------------------------------------------------
|
||||
def receive(self,data_mode,signalling_mode):
|
||||
force = False
|
||||
|
||||
self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
|
||||
|
||||
freedv_data = self.c_lib.freedv_open(data_mode)
|
||||
freedv_signalling = self.c_lib.freedv_open(signalling_mode)
|
||||
|
||||
static.FREEDV_DATA_BYTES_PER_FRAME = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv_data)/8)
|
||||
static.FREEDV_DATA_PAYLOAD_PER_FRAME = static.FREEDV_DATA_BYTES_PER_FRAME -2
|
||||
static.FREEDV_SIGNALLING_BYTES_PER_FRAME = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv_signalling)/8)
|
||||
static.FREEDV_SIGNALLING_PAYLOAD_PER_FRAME = static.FREEDV_SIGNALLING_BYTES_PER_FRAME -2
|
||||
|
||||
data_bytes_out = (ctypes.c_ubyte * static.FREEDV_DATA_BYTES_PER_FRAME)
|
||||
data_bytes_out = data_bytes_out() #get pointer from bytes_out
|
||||
|
||||
signalling_bytes_out = (ctypes.c_ubyte * static.FREEDV_SIGNALLING_BYTES_PER_FRAME)
|
||||
signalling_bytes_out = signalling_bytes_out() #get pointer from bytes_out
|
||||
|
||||
# with this we can interrupt receiving
|
||||
while static.FREEDV_RECEIVE == True:
|
||||
time.sleep(0.01)
|
||||
|
||||
# stuck in sync counter
|
||||
stuck_in_sync_counter = 0
|
||||
stuck_in_sync_10_counter = 0
|
||||
#
|
||||
|
||||
while static.ARQ_STATE == 'RECEIVING_DATA':
|
||||
time.sleep(0.01)
|
||||
|
||||
nin = self.c_lib.freedv_nin(freedv_data)
|
||||
nin = int(nin*(static.AUDIO_SAMPLE_RATE_RX/static.MODEM_SAMPLE_RATE))
|
||||
|
||||
data_in = self.stream_rx.read(nin, exception_on_overflow = False)
|
||||
data_in = data_in.rstrip(b'\x00')
|
||||
|
||||
#print(data_in)
|
||||
|
||||
self.c_lib.freedv_rawdatarx.argtype = [ctypes.POINTER(ctypes.c_ubyte), data_bytes_out, data_in] # check if really neccessary
|
||||
nbytes = self.c_lib.freedv_rawdatarx(freedv_data, data_bytes_out, data_in) # demodulate audio
|
||||
print(self.c_lib.freedv_get_rx_status(freedv_data))
|
||||
|
||||
|
||||
#-------------STUCK IN SYNC DETECTOR
|
||||
stuck_in_sync_counter += 1
|
||||
if self.c_lib.freedv_get_rx_status(freedv_data) == 10:
|
||||
stuck_in_sync_10_counter += 1
|
||||
|
||||
|
||||
#print(stuck_in_sync_counter)
|
||||
#if stuck_in_sync_counter == 33 and self.c_lib.freedv_get_rx_status(freedv_data) == 10:
|
||||
# print("stuck in sync #1 --> DOING UNSYNC")
|
||||
# self.c_lib.freedv_set_sync(freedv_data, 0) #FORCE UNSYNC
|
||||
# stuck_in_sync_counter = 0
|
||||
# stuck_in_sync_10_counter = 0
|
||||
# data_in = None
|
||||
|
||||
|
||||
if stuck_in_sync_counter >= 66 and stuck_in_sync_10_counter >= 2:
|
||||
logging.warning("modem stuck in sync")
|
||||
self.c_lib.freedv_set_sync(freedv_data, 0) #FORCE UNSYNC
|
||||
stuck_in_sync_counter = 0
|
||||
stuck_in_sync_10_counter = 0
|
||||
data_in = None
|
||||
#-----------------------------------
|
||||
|
||||
|
||||
if nbytes == static.FREEDV_DATA_BYTES_PER_FRAME:
|
||||
|
||||
# counter reset for stuck in sync counter
|
||||
stuck_in_sync_counter = 0
|
||||
stuck_in_sync_10_counter = 0
|
||||
#
|
||||
|
||||
# CHECK IF FRAMETYPE IS BETWEEN 10 and 50 ------------------------
|
||||
frametype = int.from_bytes(bytes(data_bytes_out[:1]), "big")
|
||||
frame = frametype - 10
|
||||
n_frames_per_burst = int.from_bytes(bytes(data_bytes_out[1:2]), "big")
|
||||
|
||||
if 50 >= frametype >= 10:
|
||||
if frame != 3 or force == True:
|
||||
arq.data_received(bytes(data_bytes_out[:-2])) #send payload data to arq checker without CRC16
|
||||
|
||||
#print("static.ARQ_RX_BURST_BUFFER.count(None) " + str(static.ARQ_RX_BURST_BUFFER.count(None)))
|
||||
if static.ARQ_RX_BURST_BUFFER.count(None) <= 1:
|
||||
print("FULL BURST BUFFER ---> UNSYNC")
|
||||
self.c_lib.freedv_set_sync(freedv_data, 0)
|
||||
|
||||
else:
|
||||
print("---------------------------SIMULATED MISSING FRAME")
|
||||
force = True
|
||||
else:
|
||||
print("MODE: " + str(data_mode) + " DATA: " + str(bytes(data_bytes_out)))
|
||||
|
||||
|
||||
# DO UNSYNC AFTER LAST BURST by checking the frame numbers agains the total frames per burst
|
||||
if frame == n_frames_per_burst:
|
||||
print("LAST FRAME ---> UNSYNC")
|
||||
self.c_lib.freedv_set_sync(freedv_data, 0) #FORCE UNSYNC
|
||||
|
||||
|
||||
|
||||
while static.ARQ_STATE == 'IDLE' or static.ARQ_STATE == 'RECEIVING_SIGNALLING':
|
||||
time.sleep(0.01)
|
||||
|
||||
nin = self.c_lib.freedv_nin(freedv_signalling)
|
||||
nin = int(nin*(static.AUDIO_SAMPLE_RATE_RX/static.MODEM_SAMPLE_RATE))
|
||||
|
||||
data_in = self.stream_rx.read(nin, exception_on_overflow = False)
|
||||
data_in = data_in.rstrip(b'\x00')
|
||||
|
||||
self.c_lib.freedv_rawdatarx.argtype = [ctypes.POINTER(ctypes.c_ubyte), signalling_bytes_out, data_in] # check if really neccessary
|
||||
nbytes = self.c_lib.freedv_rawdatarx(freedv_signalling, signalling_bytes_out, data_in) # demodulate audio
|
||||
|
||||
# CHECK IF FRAME CONTAINS ACK------------------------
|
||||
|
||||
if nbytes == static.FREEDV_SIGNALLING_BYTES_PER_FRAME:
|
||||
self.c_lib.freedv_set_sync(freedv_signalling, 0)
|
||||
frametype = int.from_bytes(bytes(signalling_bytes_out[:1]), "big")
|
||||
|
||||
# BURST ACK
|
||||
if frametype == 60:
|
||||
print("ACK RECEIVED....")
|
||||
arq.burst_ack_received()
|
||||
|
||||
# FRAME ACK
|
||||
elif frametype == 61:
|
||||
print("FRAME ACK RECEIVED....")
|
||||
arq.frame_ack_received()
|
||||
|
||||
# FRAME RPT
|
||||
elif frametype == 62:
|
||||
print("REPEAT REQUEST RECEIVED....")
|
||||
arq.burst_rpt_received(signalling_bytes_out[:-2])
|
||||
|
||||
else:
|
||||
print("OTHER FRAME: " + str(signalling_bytes_out[:-2]))
|
||||
|
||||
|
||||
rxstatus = self.c_lib.freedv_get_rx_status(freedv_signalling)
|
||||
print("ACK-" + str(rxstatus))
|
||||
#print(rxstatus)
|
||||
if nbytes == static.FREEDV_SIGNALLING_BYTES_PER_FRAME or rxstatus == 10:
|
||||
self.c_lib.freedv_set_sync(freedv_signalling, 0) #FORCE UNSYNC
|
||||
|
Loading…
Reference in a new issue