FreeDATA/modem/data cemetery/test/ping.py
2023-12-17 12:35:21 +01:00

214 lines
7 KiB
Python

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import argparse
import ctypes
import pathlib
import threading
import time
import pyaudio
# --------------------------------------------GET PARAMETER INPUTS
parser = argparse.ArgumentParser(description="Simons TEST TNC")
parser.add_argument("--bursts", dest="N_BURSTS", default=0, type=int)
parser.add_argument("--frames", dest="N_FRAMES_PER_BURST", default=0, type=int)
parser.add_argument("--delay", dest="DELAY_BETWEEN_BURSTS", default=0, type=int)
parser.add_argument("--txmode", dest="FREEDV_TX_MODE", default=0, type=int)
parser.add_argument("--rxmode", dest="FREEDV_RX_MODE", default=0, type=int)
parser.add_argument("--audiooutput", dest="AUDIO_OUTPUT", default=0, type=int)
parser.add_argument("--audioinput", dest="AUDIO_INPUT", default=0, type=int)
parser.add_argument("--debug", dest="DEBUGGING_MODE", action="store_true")
args, _ = parser.parse_known_args()
N_BURSTS = args.N_BURSTS
N_FRAMES_PER_BURST = args.N_FRAMES_PER_BURST
DELAY_BETWEEN_BURSTS = args.DELAY_BETWEEN_BURSTS / 1000
AUDIO_OUTPUT_DEVICE = args.AUDIO_OUTPUT
AUDIO_INPUT_DEVICE = args.AUDIO_INPUT
# 1024 good for mode 6
AUDIO_FRAMES_PER_BUFFER = 2048
MODEM_SAMPLE_RATE = 8000
FREEDV_TX_MODE = args.FREEDV_TX_MODE
FREEDV_RX_MODE = args.FREEDV_RX_MODE
DEBUGGING_MODE = args.DEBUGGING_MODE
# -------------------------------------------- LOAD FREEDV
libname = pathlib.Path().absolute() / "codec2/build_linux/src/libcodec2.so"
c_lib = ctypes.CDLL(str(libname))
# --------------------------------------------CREATE PYAUDIO INSTANCE
p = pyaudio.PyAudio()
# --------------------------------------------GET SUPPORTED SAMPLE RATES FROM SOUND DEVICE
# AUDIO_SAMPLE_RATE_TX = int(p.get_device_info_by_index(AUDIO_OUTPUT_DEVICE)['defaultSampleRate'])
# AUDIO_SAMPLE_RATE_RX = int(p.get_device_info_by_index(AUDIO_INPUT_DEVICE)['defaultSampleRate'])
AUDIO_SAMPLE_RATE_TX = 8000
AUDIO_SAMPLE_RATE_RX = 8000
# --------------------------------------------OPEN AUDIO CHANNEL TX
stream_tx = p.open(
format=pyaudio.paInt16,
channels=1,
rate=AUDIO_SAMPLE_RATE_TX,
frames_per_buffer=AUDIO_FRAMES_PER_BUFFER, # n_nom_modem_samples
output=True,
output_device_index=AUDIO_OUTPUT_DEVICE,
)
stream_rx = p.open(
format=pyaudio.paInt16,
channels=1,
rate=AUDIO_SAMPLE_RATE_RX,
frames_per_buffer=AUDIO_FRAMES_PER_BUFFER,
input=True,
input_device_index=AUDIO_INPUT_DEVICE,
)
def receive():
c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
freedv = c_lib.freedv_open(FREEDV_RX_MODE)
bytes_per_frame = int(c_lib.freedv_get_bits_per_modem_frame(freedv) / 8)
payload_per_frame = bytes_per_frame - 2
n_nom_modem_samples = c_lib.freedv_get_n_nom_modem_samples(freedv)
n_tx_modem_samples = c_lib.freedv_get_n_tx_modem_samples(
freedv
) # get n_tx_modem_samples which defines the size of the modulation object # --> *2
bytes_out = ctypes.c_ubyte * bytes_per_frame # bytes_per_frame
bytes_out = bytes_out() # get pointer from bytes_out
rx_total_frames = 0
rx_frames = 0
rx_bursts = 0
receive = True
total_n_bytes = 0
while receive:
time.sleep(0.01)
nin = c_lib.freedv_nin(freedv)
nin_converted = int(nin * (AUDIO_SAMPLE_RATE_RX / MODEM_SAMPLE_RATE))
if DEBUGGING_MODE:
print("-----------------------------")
print(f"NIN: {str(nin)} [ {nin_converted} ]")
data_in = stream_rx.read(nin_converted, exception_on_overflow=False)
data_in = data_in.rstrip(b"\x00")
c_lib.freedv_rawdatarx.argtype = [
ctypes.POINTER(ctypes.c_ubyte),
bytes_out,
data_in,
] # check if really neccessary
nbytes = c_lib.freedv_rawdatarx(freedv, bytes_out, data_in) # demodulate audio
total_n_bytes = total_n_bytes + nbytes
if DEBUGGING_MODE:
print(f"SYNC: {str(c_lib.freedv_get_rx_status(freedv))}")
if nbytes == bytes_per_frame:
rx_total_frames = rx_total_frames + 1
rx_frames = rx_frames + 1
if rx_frames == N_FRAMES_PER_BURST:
rx_frames = 0
rx_bursts = rx_bursts + 1
c_lib.freedv_set_sync(freedv, 0)
burst = bytes_out[0]
n_total_burst = bytes_out[1]
frame = bytes_out[2]
n_total_frame = bytes_out[3]
print(
f"RX | PONG | BURST [{str(burst)}/{str(n_total_burst)}] FRAME [{str(frame)}/{str(n_total_frame)}]"
)
print("-----------------------------------------------------------------")
c_lib.freedv_set_sync(freedv, 0)
if rx_bursts == N_BURSTS:
receive = False
RECEIVE = threading.Thread(target=receive, name="RECEIVE THREAD")
RECEIVE.start()
c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
freedv = c_lib.freedv_open(FREEDV_TX_MODE)
bytes_per_frame = int(c_lib.freedv_get_bits_per_modem_frame(freedv) / 8)
n_nom_modem_samples = c_lib.freedv_get_n_nom_modem_samples(freedv)
n_tx_modem_samples = c_lib.freedv_get_n_tx_modem_samples(
freedv
) # get n_tx_modem_samples which defines the size of the modulation object # --> *2
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()
print(f"BURSTS: {str(N_BURSTS)} FRAMES: {str(N_FRAMES_PER_BURST)}")
print("-----------------------------------------------------------------")
payload_per_frame = bytes_per_frame - 2
for i in range(N_BURSTS):
c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble)
txbuffer = bytearray()
txbuffer += bytes(mod_out_preamble)
for n in range(N_FRAMES_PER_BURST):
data_out = bytearray()
data_out += bytes([i + 1])
data_out += bytes([N_BURSTS])
data_out += bytes([n + 1])
data_out += bytes([N_FRAMES_PER_BURST])
buffer = bytearray(
payload_per_frame
) # use this if CRC16 checksum is required ( DATA1-3)
buffer[
: len(data_out)
] = data_out # set buffer size to length of data which will be sent
crc = ctypes.c_ushort(
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)
c_lib.freedv_rawdatatx(
freedv, mod_out, data
) # modulate DATA and safe it into mod_out pointer
txbuffer += bytes(mod_out)
print(
f"TX | PING | BURST [{str(i + 1)}/{str(N_BURSTS)}] FRAME [{str(n + 1)}/{str(N_FRAMES_PER_BURST)}]"
)
stream_tx.write(bytes(txbuffer))
ACK_TIMEOUT = time.time() + 3
txbuffer = bytearray()
# time.sleep(DELAY_BETWEEN_BURSTS)
# WAIT UNTIL WE RECEIVD AN ACK/datac13 FRAME
while ACK_TIMEOUT >= time.time():
time.sleep(0.01)
time.sleep(1)
stream_tx.close()
p.terminate()