#!/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/DATAC0 FRAME while ACK_TIMEOUT >= time.time(): time.sleep(0.01) time.sleep(1) stream_tx.close() p.terminate()