#!/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 audioop import asyncio #import sys import logging import time import threading import helpers import static import data_handler import Hamlib 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_10 = threading.Thread(target=self.receive, args=[10], name="FREEDV_DECODER_THREAD") FREEDV_DECODER_THREAD_10.start() FREEDV_DECODER_THREAD_11 = threading.Thread(target=self.receive, args=[11], name="FREEDV_DECODER_THREAD") FREEDV_DECODER_THREAD_11.start() FREEDV_DECODER_THREAD_12 = threading.Thread(target=self.receive, args=[12], name="FREEDV_DECODER_THREAD") FREEDV_DECODER_THREAD_12.start() FREEDV_DECODER_THREAD_14 = threading.Thread(target=self.receive, args=[static.FREEDV_SIGNALLING_MODE], name="FREEDV_DECODER_THREAD") FREEDV_DECODER_THREAD_14.start() #--------------------------------------------CONFIGURE HAMLIB Hamlib.rig_set_debug(Hamlib.RIG_DEBUG_NONE) # Init RIG_MODEL_DUMMY self.my_rig = Hamlib.Rig(Hamlib.RIG_MODEL_DUMMY) self.my_rig.set_conf("rig_pathname", "/dev/Rig") self.my_rig.set_conf("retry", "5") self.my_rig.open () if static.HAMLIB_PTT_TYPE == 'RIG_PTT_RIG': self.hamlib_ptt_type = Hamlib.RIG_PTT_RIG elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_SERIAL_DTR': self.hamlib_ptt_type = Hamlib.RIG_PTT_SERIAL_DTR elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_SERIAL_RTS': self.hamlib_ptt_type = Hamlib.RIG_PTT_SERIAL_RTS elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_PARALLEL': self.hamlib_ptt_type = Hamlib.RIG_PTT_PARALLEL elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_RIG_MICDATA': self.hamlib_ptt_type = Hamlib.RIG_PTT_RIG_MICDATA elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_CM108': self.hamlib_ptt_type = Hamlib.RIG_PTT_CM108 else:# static.HAMLIB_PTT_TYPE == 'RIG_PTT_NONE': self.hamlib_ptt_type = Hamlib.RIG_PTT_NONE self.my_rig.set_ptt(self.hamlib_ptt_type,0) #-------------------------------------------------------------------------------------------------------- def transmit_signalling(self,ack_buffer): #print(ack_buffer) #static.ARQ_STATE = 'SENDING_ACK' state_before_transmit = static.CHANNEL_STATE static.CHANNEL_STATE = 'SENDING_SIGNALLING' static.PTT_STATE = True self.my_rig.set_ptt(self.hamlib_ptt_type,1) 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) #get n_tx_modem_samples which defines the size of the modulation object n_tx_preamble_modem_samples = self.c_lib.freedv_get_n_tx_preamble_modem_samples(freedv) mod_out = ctypes.c_short * n_tx_modem_samples mod_out = mod_out() mod_out_preamble = ctypes.c_short * n_tx_preamble_modem_samples #*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) 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 += bytes(mod_out) # -------------- transmit audio twice logging.debug("SEND SIGNALLING FRAME " + str(ack_buffer)) self.stream_tx.write(bytes(txbuffer)) self.my_rig.set_ptt(self.hamlib_ptt_type,0) static.PTT_STATE = False static.CHANNEL_STATE = state_before_transmit #static.CHANNEL_STATE = 'RECEIVING_SIGNALLING' #static.ARQ_STATE = 'RECEIVING_DATA' self.c_lib.freedv_close(freedv) time.sleep(0.5) #-------------------------------------------------------------------------------------------------------- # GET ARQ BURST FRAME VOM BUFFER AND MODULATE IT async def transmit_arq_burst(self): self.my_rig.set_ptt(self.hamlib_ptt_type,1) static.PTT_STATE = True state_before_transmit = static.CHANNEL_STATE static.CHANNEL_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 n_tx_preamble_modem_samples = self.c_lib.freedv_get_n_tx_preamble_modem_samples(freedv) mod_out = ctypes.c_short * n_tx_modem_samples mod_out = mod_out() mod_out_preamble = ctypes.c_short * n_tx_preamble_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) 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) 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 #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) # -------------- transmit audio self.stream_tx.write(bytes(txbuffer)) #static.ARQ_STATE = 'IDLE' static.CHANNEL_STATE = 'RECEIVING_SIGNALLING' static.PTT_STATE = False self.my_rig.set_ptt(self.hamlib_ptt_type,0) self.c_lib.freedv_close(freedv) #-------------------------------------------------------------------------------------------------------- def receive(self,mode): force = True self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte) freedv = self.c_lib.freedv_open(mode) bytes_per_frame = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv)/8) if mode == static.FREEDV_SIGNALLING_MODE: static.FREEDV_SIGNALLING_BYTES_PER_FRAME = bytes_per_frame static.FREEDV_SIGNALLING_PAYLOAD_PER_FRAME = bytes_per_frame - 2 self.c_lib.freedv_set_frames_per_burst(freedv, 1); elif mode == static.ARQ_DATA_CHANNEL_MODE: static.FREEDV_DATA_BYTES_PER_FRAME = bytes_per_frame static.FREEDV_DATA_PAYLOAD_PER_FRAME = bytes_per_frame - 2 self.c_lib.freedv_set_frames_per_burst(freedv, 0); else: pass bytes_out = (ctypes.c_ubyte * bytes_per_frame) bytes_out = bytes_out() #get pointer to bytes_out while static.FREEDV_RECEIVE == True: time.sleep(0.05) # stuck in sync counter stuck_in_sync_counter = 0 stuck_in_sync_10_counter = 0 # # here we do an unsync to be sure, the modem is in idle state and ready for new data self.c_lib.freedv_set_sync(freedv, 0) # here we do a buffer cleanup before returning to demod loop dummy_mod = bytes(self.c_lib.freedv_nin(freedv)) self.c_lib.freedv_rawdatarx(freedv, bytes_out, dummy_mod) #demod loop while (static.CHANNEL_STATE == 'RECEIVING_DATA' and static.ARQ_DATA_CHANNEL_MODE == mode) or (static.CHANNEL_STATE == 'RECEIVING_SIGNALLING' and static.FREEDV_SIGNALLING_MODE == mode): time.sleep(0.01) # refresh vars, so the correct parameters of the used mode are set static.FREEDV_DATA_BYTES_PER_FRAME = bytes_per_frame static.FREEDV_DATA_PAYLOAD_PER_FRAME = bytes_per_frame - 2 nin = self.c_lib.freedv_nin(freedv) #nin = int(nin*(static.AUDIO_SAMPLE_RATE_RX/static.MODEM_SAMPLE_RATE)) data_in = self.stream_rx.read(nin, exception_on_overflow = False) #print(audioop.rms(data_in, 2)) #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, bytes_out, data_in) # demodulate audio #logging.debug(self.c_lib.freedv_get_rx_status(freedv)) #print("listening-" + str(mode) + "-" + str(self.c_lib.freedv_get_rx_status(freedv))) #-------------STUCK IN SYNC DETECTOR stuck_in_sync_counter += 1 if self.c_lib.freedv_get_rx_status(freedv) == 10: stuck_in_sync_10_counter += 1 self.c_lib.freedv_set_sync(freedv, 0) logging.warning("MODEM | SYNC 10 TRIGGER | M:" + str(mode)) if stuck_in_sync_counter == 33 and self.c_lib.freedv_get_rx_status(freedv) == 10: logging.critical("MODEM | stuck in sync #1") self.c_lib.freedv_set_sync(freedv, 0) #FORCE UNSYNC stuck_in_sync_counter = 0 stuck_in_sync_10_counter = 0 if stuck_in_sync_counter >= 66 and stuck_in_sync_10_counter >= 2: logging.critical("MODEM | stuck in sync #2") self.c_lib.freedv_set_sync(freedv, 0) #FORCE UNSYNC stuck_in_sync_counter = 0 stuck_in_sync_10_counter = 0 #----------------------------------- # forward data only if broadcast or we are the receiver if nbytes == bytes_per_frame and bytes(bytes_out[1:2]) == static.MYCALLSIGN_CRC8 or bytes(bytes_out[1:2]) == b'\x01': self.calculate_ber(freedv) # 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(bytes_out[:1]), "big") frame = frametype - 10 n_frames_per_burst = int.from_bytes(bytes(bytes_out[1:2]), "big") #self.c_lib.freedv_set_frames_per_burst(freedv_data, n_frames_per_burst); if 50 >= frametype >= 10: if frame != 3 or force == True: data_handler.arq_data_received(bytes(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: logging.debug("FULL BURST BUFFER ---> UNSYNC") self.c_lib.freedv_set_sync(freedv, 0) else: logging.critical("---------------------------SIMULATED MISSING FRAME") force = True # BURST ACK elif frametype == 60: logging.debug("ACK RECEIVED....") data_handler.burst_ack_received() # FRAME ACK elif frametype == 61: logging.debug("FRAME ACK RECEIVED....") data_handler.frame_ack_received() # FRAME RPT elif frametype == 62: logging.debug("REPEAT REQUEST RECEIVED....") data_handler.burst_rpt_received(bytes_out[:-2]) # CQ FRAME elif frametype == 200: logging.debug("CQ RECEIVED....") data_handler.received_cq(bytes_out[:-2]) # PING FRAME elif frametype == 210: logging.debug("PING RECEIVED....") data_handler.received_ping(bytes_out[:-2]) # PING ACK elif frametype == 211: logging.debug("PING ACK RECEIVED....") data_handler.received_ping_ack(bytes_out[:-2]) # ARQ CONNECT elif frametype == 220: logging.debug("ARQ CONNECT RECEIVED....") data_handler.arq_received_connect(bytes_out[:-2]) # ARQ CONNECT ACK / KEEP ALIVE elif frametype == 221: logging.debug("ARQ CONNECT ACK RECEIVED / KEEP ALIVE....") data_handler.arq_received_connect_keep_alive(bytes_out[:-2]) # ARQ CONNECT ACK / KEEP ALIVE elif frametype == 222: logging.debug("ARQ DISCONNECT RECEIVED") data_handler.arq_disconnect_received(bytes_out[:-2]) # ARQ FILE TRANSFER RECEIVED! elif frametype == 225: logging.debug("ARQ arq_received_data_channel_opener RECEIVED") data_handler.arq_received_data_channel_opener(bytes_out[:-2]) # ARQ CHANNEL IS OPENED elif frametype == 226: logging.debug("ARQ arq_received_channel_is_open RECEIVED") data_handler.arq_received_channel_is_open(bytes_out[:-2]) # ARQ CONNECT ACK / KEEP ALIVE elif frametype == 230: logging.debug("BEACON RECEIVED") else: logging.info("OTHER FRAME: " + str(bytes_out[:-2])) print(frametype) # DO UNSYNC AFTER LAST BURST by checking the frame nums agains the total frames per burst if frame == n_frames_per_burst: logging.debug("LAST FRAME ---> UNSYNC") self.c_lib.freedv_set_sync(freedv, 0) #FORCE UNSYNC # clear bytes_out buffer to be ready for next frames after successfull decoding bytes_out = (ctypes.c_ubyte * bytes_per_frame) bytes_out = bytes_out() #get pointer to bytes_out def calculate_ber(self,freedv): Tbits = self.c_lib.freedv_get_total_bits(freedv) Terrs = self.c_lib.freedv_get_total_bit_errors(freedv) if Tbits != 0: ber = (Terrs/Tbits)*100 static.BER = int(ber) self.c_lib.freedv_set_total_bit_errors(freedv,0) self.c_lib.freedv_set_total_bits(freedv,0)