mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
712 lines
30 KiB
Python
712 lines
30 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Created on Wed Dec 23 07:04:24 2020
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@author: DJ2LS
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"""
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import ctypes
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from ctypes import *
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import pathlib
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import pyaudio
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import audioop
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import asyncio
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#import sys
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import logging
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import time
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import threading
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import helpers
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import static
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import data_handler
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#import Hamlib
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import rigctld
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rigctld = rigctld.Rigctld()
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MODEM_STATS_NR_MAX = 320
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MODEM_STATS_NC_MAX = 51
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class MODEMSTATS(ctypes.Structure):
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_fields_ = [
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("Nc", ctypes.c_int),
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("snr_est", ctypes.c_float),
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("rx_symbols", (ctypes.c_float * MODEM_STATS_NR_MAX)*MODEM_STATS_NC_MAX),
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("nr", ctypes.c_int),
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("sync", ctypes.c_int),
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("foff", ctypes.c_float),
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("rx_timing", ctypes.c_float),
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("clock_offset", ctypes.c_float),
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("sync_metric", ctypes.c_float),
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("pre", ctypes.c_int),
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("post", ctypes.c_int),
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("uw_fails", ctypes.c_int),
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]
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class RF():
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def __init__(self):
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# -------------------------------------------- LOAD FREEDV
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libname = pathlib.Path().absolute() / "codec2/build_linux/src/libcodec2.so"
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self.c_lib = ctypes.CDLL(libname)
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# --------------------------------------------CREATE PYAUDIO INSTANCE
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self.p = pyaudio.PyAudio()
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# --------------------------------------------OPEN AUDIO CHANNEL RX
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self.stream_rx = self.p.open(format=pyaudio.paInt16,
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channels=static.AUDIO_CHANNELS,
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rate=static.AUDIO_SAMPLE_RATE_RX,
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frames_per_buffer=static.AUDIO_FRAMES_PER_BUFFER,
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input=True,
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input_device_index=static.AUDIO_INPUT_DEVICE
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)
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# --------------------------------------------OPEN AUDIO CHANNEL TX
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self.stream_tx = self.p.open(format=pyaudio.paInt16,
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channels=1,
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rate=static.AUDIO_SAMPLE_RATE_TX,
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frames_per_buffer=static.AUDIO_FRAMES_PER_BUFFER, # n_nom_modem_samples
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output=True,
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output_device_index=static.AUDIO_OUTPUT_DEVICE, # static.AUDIO_OUTPUT_DEVICE
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)
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self.streambuffer = bytes(0)
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self.audio_writing_to_stream = False
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# --------------------------------------------START DECODER THREAD
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FREEDV_DECODER_THREAD_10 = threading.Thread(target=self.receive, args=[10], name="FREEDV_DECODER_THREAD_10")
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FREEDV_DECODER_THREAD_10.start()
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#FREEDV_DECODER_THREAD_11 = threading.Thread(target=self.receive, args=[11], name="FREEDV_DECODER_THREAD_11")
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#FREEDV_DECODER_THREAD_11.start()
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FREEDV_DECODER_THREAD_12 = threading.Thread(target=self.receive, args=[12], name="FREEDV_DECODER_THREAD_12")
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FREEDV_DECODER_THREAD_12.start()
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FREEDV_DECODER_THREAD_14 = threading.Thread(target=self.receive, args=[static.FREEDV_SIGNALLING_MODE], name="FREEDV_DECODER_THREAD_14")
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FREEDV_DECODER_THREAD_14.start()
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FREEDV_PLAYBACK_THREAD = threading.Thread(target=self.play_audio, name="FREEDV_DECODER_THREAD_14")
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FREEDV_PLAYBACK_THREAD.start()
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# --------------------------------------------CONFIGURE HAMLIB
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'''
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# try to init hamlib
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try:
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Hamlib.rig_set_debug(Hamlib.RIG_DEBUG_NONE)
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self.my_rig = Hamlib.Rig(static.HAMLIB_DEVICE_ID)
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self.my_rig.set_conf("rig_pathname", static.HAMLIB_DEVICE_PORT)
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self.my_rig.set_conf("retry", "5")
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self.my_rig.set_conf("serial_speed", static.HAMLIB_SERIAL_SPEED)
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#self.my_rig.set_conf("dtr_state", "OFF")
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#my_rig.set_conf("rts_state", "OFF")
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#self.my_rig.set_conf("ptt_type", "RTS")
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#my_rig.set_conf("ptt_type", "RIG_PTT_SERIAL_RTS")
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self.my_rig.set_conf("serial_handshake", "None")
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self.my_rig.set_conf("stop_bits", "1")
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self.my_rig.set_conf("data_bits", "8")
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#my_rig.set_ptt(Hamlib.RIG_PTT_RIG,0)
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#my_rig.set_ptt(Hamlib.RIG_PTT_SERIAL_DTR,0)
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#my_rig.set_ptt(Hamlib.RIG_PTT_SERIAL_RTS,1)
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if static.HAMLIB_PTT_TYPE == 'RIG_PTT_RIG':
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self.hamlib_ptt_type = Hamlib.RIG_PTT_RIG
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elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_SERIAL_DTR':
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self.hamlib_ptt_type = Hamlib.RIG_PTT_SERIAL_DTR
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elif static.HAMLIB_PTT_TYPE == 'RTS':
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self.hamlib_ptt_type = Hamlib.RIG_PTT_SERIAL_RTS
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self.my_rig.set_conf("dtr_state", "OFF")
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self.my_rig.set_conf("ptt_type", "RTS")
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elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_PARALLEL':
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self.hamlib_ptt_type = Hamlib.RIG_PTT_PARALLEL
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elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_RIG_MICDATA':
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self.hamlib_ptt_type = Hamlib.RIG_PTT_RIG_MICDATA
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elif static.HAMLIB_PTT_TYPE == 'RIG_PTT_CM108':
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self.hamlib_ptt_type = Hamlib.RIG_PTT_CM108
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else: # static.HAMLIB_PTT_TYPE == 'RIG_PTT_NONE':
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self.hamlib_ptt_type = Hamlib.RIG_PTT_NONE
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self.my_rig.open()
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except:
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print("can't open rig")
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'''
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# --------------------------------------------------------------------------------------------------------
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def ptt_and_wait(self, state):
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if state:
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static.PTT_STATE = True
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#self.my_rig.set_ptt(self.hamlib_ptt_type, 1)
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rigctld.ptt_enable()
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ptt_togle_timeout = time.time() + 0.1
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while time.time() < ptt_togle_timeout:
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pass
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else:
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ptt_togle_timeout = time.time() + 0.5
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while time.time() < ptt_togle_timeout:
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pass
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static.PTT_STATE = False
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#self.my_rig.set_ptt(self.hamlib_ptt_type, 0)
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rigctld.ptt_disable()
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def play_audio(self):
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while True:
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time.sleep(0.01)
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while len(self.streambuffer) > 0:
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time.sleep(0.01)
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if len(self.streambuffer) > 0:
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self.audio_writing_to_stream = True
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self.streambuffer = bytes(self.streambuffer)
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# we need t wait a little bit until the buffer is filled. If we are not waiting, we are sending empty data
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time.sleep(0.1)
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self.stream_tx.write(self.streambuffer)
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self.streambuffer = bytes()
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self.audio_writing_to_stream = False
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# --------------------------------------------------------------------------------------------------------
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def transmit_signalling(self, data_out, count):
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state_before_transmit = static.CHANNEL_STATE
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static.CHANNEL_STATE = 'SENDING_SIGNALLING'
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print(static.CHANNEL_STATE)
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self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
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freedv = self.c_lib.freedv_open(static.FREEDV_SIGNALLING_MODE)
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bytes_per_frame = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv) / 8)
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payload_per_frame = bytes_per_frame - 2
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n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(freedv)
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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
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n_tx_preamble_modem_samples = self.c_lib.freedv_get_n_tx_preamble_modem_samples(freedv)
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n_tx_postamble_modem_samples = self.c_lib.freedv_get_n_tx_postamble_modem_samples(freedv)
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mod_out = ctypes.c_short * n_tx_modem_samples
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mod_out = mod_out()
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mod_out_preamble = ctypes.c_short * n_tx_preamble_modem_samples # *2 #1760 for mode 10,11,12 #4000 for mode 9
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mod_out_preamble = mod_out_preamble()
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mod_out_postamble = ctypes.c_short * n_tx_postamble_modem_samples # *2 #1760 for mode 10,11,12 #4000 for mode 9
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mod_out_postamble = mod_out_postamble()
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buffer = bytearray(payload_per_frame) # use this if CRC16 checksum is required ( DATA1-3)
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buffer[:len(data_out)] = data_out # set buffersize to length of data which will be send
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crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), payload_per_frame)) # generate CRC16
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crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
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buffer += crc # append crc16 to buffer
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data = (ctypes.c_ubyte * bytes_per_frame).from_buffer_copy(buffer)
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self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble)
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self.c_lib.freedv_rawdatatx(freedv, mod_out, data) # modulate DATA and safe it into mod_out pointer
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self.c_lib.freedv_rawdatapostambletx(freedv, mod_out_postamble)
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self.streambuffer = bytearray()
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self.streambuffer += bytes(mod_out_preamble)
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self.streambuffer += bytes(mod_out)
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self.streambuffer += bytes(mod_out_postamble)
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converted_audio = audioop.ratecv(self.streambuffer,2,1,static.MODEM_SAMPLE_RATE, static.AUDIO_SAMPLE_RATE_TX, None)
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self.streambuffer = bytes(converted_audio[0])
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# append frame again with as much as in count defined
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for i in range(1, count):
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self.streambuffer += bytes(converted_audio[0])
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print(len(self.streambuffer))
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#self.streambuffer += bytes(converted_audio[0])
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print(len(self.streambuffer))
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# -------------- transmit audio
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#logging.debug("SENDING SIGNALLING FRAME " + str(data_out))
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##state_before_transmit = static.CHANNEL_STATE
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##static.CHANNEL_STATE = 'SENDING_SIGNALLING'
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self.ptt_and_wait(True)
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self.audio_writing_to_stream = True
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# wait until audio has been processed
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while self.audio_writing_to_stream:
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time.sleep(0.01)
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static.CHANNEL_STATE = 'SENDING_SIGNALLING'
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self.ptt_and_wait(False)
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## we have a problem with the receiving state
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##static.CHANNEL_STATE = state_before_transmit
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if state_before_transmit != 'RECEIVING_DATA':
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static.CHANNEL_STATE = 'RECEIVING_SIGNALLING'
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else:
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static.CHANNEL_STATE = state_before_transmit
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self.c_lib.freedv_close(freedv)
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# --------------------------------------------------------------------------------------------------------
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# GET ARQ BURST FRAME VOM BUFFER AND MODULATE IT
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def transmit_arq_burst(self):
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# we could place this timing part inside the modem...
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# lets see if this is a good idea..
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static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time()) # we need to update our timeout timestamp
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static.ARQ_START_OF_BURST = int(time.time()) # we need to update our timeout timestamp
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self.my_rig.set_ptt(self.hamlib_ptt_type, 1)
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state_before_transmit = static.CHANNEL_STATE
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static.CHANNEL_STATE = 'SENDING_DATA'
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self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
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freedv = self.c_lib.freedv_open(static.ARQ_DATA_CHANNEL_MODE)
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static.FREEDV_DATA_BYTES_PER_FRAME = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv) / 8)
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static.FREEDV_DATA_PAYLOAD_PER_FRAME = static.FREEDV_DATA_BYTES_PER_FRAME - 2
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n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(freedv)
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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
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n_tx_preamble_modem_samples = self.c_lib.freedv_get_n_tx_preamble_modem_samples(freedv)
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n_tx_postamble_modem_samples = self.c_lib.freedv_get_n_tx_postamble_modem_samples(freedv)
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mod_out = ctypes.c_short * n_tx_modem_samples
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mod_out = mod_out()
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mod_out_preamble = ctypes.c_short * n_tx_preamble_modem_samples # *2 #1760 for mode 10,11,12 #4000 for mode 9
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mod_out_preamble = mod_out_preamble()
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mod_out_postamble = ctypes.c_short * n_tx_postamble_modem_samples # *2 #1760 for mode 10,11,12 #4000 for mode 9
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mod_out_postamble = mod_out_postamble()
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self.streambuffer = bytearray()
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self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble)
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self.streambuffer += bytes(mod_out_preamble)
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if not static.ARQ_RPT_RECEIVED:
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for n in range(0, static.ARQ_TX_N_FRAMES_PER_BURST):
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# ---------------------------BUILD ARQ BURST ---------------------------------------------------------------------
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frame_type = 10 + n + 1 # static.ARQ_TX_N_FRAMES_PER_BURST
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frame_type = bytes([frame_type])
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payload_data = bytes(static.TX_BUFFER[static.ARQ_N_SENT_FRAMES + n])
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n_current_arq_frame = static.ARQ_N_SENT_FRAMES + n + 1
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static.ARQ_TX_N_CURRENT_ARQ_FRAME = n_current_arq_frame.to_bytes(2, byteorder='big')
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n_total_arq_frame = len(static.TX_BUFFER)
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static.ARQ_TX_N_TOTAL_ARQ_FRAMES = n_total_arq_frame
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arqframe = frame_type + \
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bytes([static.ARQ_TX_N_FRAMES_PER_BURST]) + \
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static.ARQ_TX_N_CURRENT_ARQ_FRAME + \
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n_total_arq_frame.to_bytes(2, byteorder='big') + \
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static.DXCALLSIGN_CRC8 + \
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static.MYCALLSIGN_CRC8 + \
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payload_data
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buffer = bytearray(static.FREEDV_DATA_PAYLOAD_PER_FRAME) # create TX buffer
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buffer[:len(arqframe)] = arqframe # set buffersize to length of data which will be send
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crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), static.FREEDV_DATA_PAYLOAD_PER_FRAME)) # generate CRC16
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crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
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buffer += crc # append crc16 to buffer
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data = (ctypes.c_ubyte * static.FREEDV_DATA_BYTES_PER_FRAME).from_buffer_copy(buffer)
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self.c_lib.freedv_rawdatatx(freedv, mod_out, data) # modulate DATA and safe it into mod_out pointer
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self.streambuffer += bytes(mod_out)
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elif static.ARQ_RPT_RECEIVED:
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for n in range(0, len(static.ARQ_RPT_FRAMES)):
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missing_frame = int.from_bytes(static.ARQ_RPT_FRAMES[n], "big")
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# ---------------------------BUILD ARQ BURST ---------------------------------------------------------------------
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frame_type = 10 + missing_frame # static.ARQ_TX_N_FRAMES_PER_BURST
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frame_type = bytes([frame_type])
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try:
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payload_data = bytes(static.TX_BUFFER[static.ARQ_N_SENT_FRAMES + missing_frame - 1])
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except:
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print("modem buffer selection problem with ARQ RPT frames")
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n_current_arq_frame = static.ARQ_N_SENT_FRAMES + missing_frame
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static.ARQ_TX_N_CURRENT_ARQ_FRAME = n_current_arq_frame.to_bytes(2, byteorder='big')
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n_total_arq_frame = len(static.TX_BUFFER)
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static.ARQ_TX_N_TOTAL_ARQ_FRAMES = n_total_arq_frame
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arqframe = frame_type + \
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bytes([static.ARQ_TX_N_FRAMES_PER_BURST]) + \
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static.ARQ_TX_N_CURRENT_ARQ_FRAME + \
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n_total_arq_frame.to_bytes(2, byteorder='big') + \
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static.DXCALLSIGN_CRC8 + \
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static.MYCALLSIGN_CRC8 + \
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payload_data
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buffer = bytearray(static.FREEDV_DATA_PAYLOAD_PER_FRAME) # create TX buffer
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buffer[:len(arqframe)] = arqframe # set buffersize to length of data which will be send
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crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), static.FREEDV_DATA_PAYLOAD_PER_FRAME)) # generate CRC16
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crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
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buffer += crc # append crc16 to buffer
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data = (ctypes.c_ubyte * static.FREEDV_DATA_BYTES_PER_FRAME).from_buffer_copy(buffer)
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self.c_lib.freedv_rawdatatx(freedv, mod_out, data) # modulate DATA and safe it into mod_out pointer
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self.streambuffer += bytes(mod_out)
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self.c_lib.freedv_rawdatapostambletx(freedv, mod_out_postamble)
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self.streambuffer += bytes(mod_out_postamble)
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converted_audio = audioop.ratecv(self.streambuffer,2,1,static.MODEM_SAMPLE_RATE, static.AUDIO_SAMPLE_RATE_TX, None)
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self.streambuffer = bytes(converted_audio[0])
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# -------------- transmit audio
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self.ptt_and_wait(True)
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self.audio_writing_to_stream = True
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# wait until audio has been processed
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while self.audio_writing_to_stream:
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time.sleep(0.01)
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static.CHANNEL_STATE = 'SENDING_DATA'
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static.CHANNEL_STATE = 'RECEIVING_SIGNALLING'
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self.ptt_and_wait(False)
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self.c_lib.freedv_close(freedv)
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# --------------------------------------------------------------------------------------------------------
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def receive(self, mode):
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force = False
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|
|
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
|
|
self.c_lib.freedv_set_frames_per_burst(freedv, 0)
|
|
|
|
bytes_out = (ctypes.c_ubyte * bytes_per_frame)
|
|
bytes_out = bytes_out() # get pointer to bytes_out
|
|
|
|
while static.FREEDV_RECEIVE == True:
|
|
time.sleep(0.01)
|
|
|
|
# lets get the frequency, mode and bandwith
|
|
self.get_radio_stats()
|
|
|
|
# lets get scatter data
|
|
self.get_scatter(freedv)
|
|
|
|
# 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
|
|
if 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
|
|
|
|
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)
|
|
|
|
#self.calculate_fft(data_in)
|
|
|
|
|
|
data_in = audioop.ratecv(data_in,2,1,static.AUDIO_SAMPLE_RATE_RX, static.MODEM_SAMPLE_RATE, None)
|
|
data_in = data_in[0]
|
|
|
|
static.AUDIO_RMS = audioop.rms(data_in, 2)
|
|
nbytes = self.c_lib.freedv_rawdatarx(freedv, bytes_out, data_in) # demodulate audio
|
|
#print("listening-" + str(mode) + " - " + "nin: " + str(nin) + " - " + str(self.c_lib.freedv_get_rx_status(freedv)))
|
|
|
|
self.calculate_snr(freedv)
|
|
|
|
# forward data only if broadcast or we are the receiver
|
|
# bytes_out[1:2] == callsign check for signalling frames, bytes_out[6:7] == callsign check for data frames, bytes_out[1:2] == b'\x01' --> broadcasts like CQ
|
|
# we could also create an own function, which returns True. In this case we could add callsign blacklists and so on
|
|
|
|
|
|
|
|
# lets get scatter data
|
|
self.get_scatter(freedv)
|
|
if nbytes == bytes_per_frame and bytes(bytes_out[1:2]) == static.MYCALLSIGN_CRC8 or bytes(bytes_out[6:7]) == static.MYCALLSIGN_CRC8 or bytes(bytes_out[1:2]) == b'\x01':
|
|
|
|
self.calculate_snr(freedv)
|
|
#static.SCATTER = []
|
|
|
|
# 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])
|
|
|
|
# FRAME NAK
|
|
elif frametype == 63:
|
|
logging.debug("FRAME NAK RECEIVED....")
|
|
data_handler.frame_nack_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.info("ARQ CONNECT RECEIVED....")
|
|
data_handler.arq_received_connect(bytes_out[:-2])
|
|
|
|
# ARQ CONNECT ACK / KEEP ALIVE
|
|
elif frametype == 221:
|
|
logging.info("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")
|
|
data_handler.received_beacon(bytes_out[:-2])
|
|
|
|
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")
|
|
|
|
bytes_out = (ctypes.c_ubyte * bytes_per_frame)
|
|
bytes_out = bytes_out() # get pointer to bytes_out
|
|
|
|
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
|
|
|
|
else:
|
|
# for debugging purposes to receive all data
|
|
pass
|
|
# print(bytes_out[:-2])
|
|
def get_scatter(self, freedv):
|
|
modemStats = MODEMSTATS()
|
|
self.c_lib.freedv_get_modem_extended_stats.restype = None
|
|
self.c_lib.freedv_get_modem_extended_stats(freedv, ctypes.byref(modemStats))
|
|
|
|
|
|
scatterdata = []
|
|
for i in range(MODEM_STATS_NC_MAX):
|
|
for j in range(MODEM_STATS_NR_MAX):
|
|
#check if odd or not to get every 2nd item for x
|
|
if (j % 2) == 0:
|
|
xsymbols = modemStats.rx_symbols[i][j]
|
|
ysymbols = modemStats.rx_symbols[i][j+1]
|
|
# check if value 0.0 or has real data
|
|
if xsymbols != 0.0 and ysymbols != 0.0:
|
|
scatterdata.append({"x" : xsymbols, "y" : ysymbols })
|
|
|
|
# only append scatter data if new data arrived
|
|
if len(scatterdata) > 0:
|
|
static.SCATTER = scatterdata
|
|
|
|
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)
|
|
|
|
def calculate_snr(self, freedv):
|
|
|
|
modem_stats_snr = c_float()
|
|
modem_stats_sync = c_int()
|
|
|
|
self.c_lib.freedv_get_modem_stats(freedv,byref(modem_stats_sync), byref(modem_stats_snr))
|
|
modem_stats_snr = modem_stats_snr.value
|
|
try:
|
|
static.SNR = round(modem_stats_snr,1)
|
|
except:
|
|
static.SNR = 0
|
|
|
|
def get_radio_stats(self):
|
|
|
|
static.HAMLIB_FREQUENCY = rigctld.get_frequency()
|
|
static.HAMLIB_MODE = rigctld.get_mode()[0]
|
|
static.HAMLIB_BANDWITH = rigctld.get_mode()[1]
|
|
|
|
|
|
def calculate_fft(self, data_in):
|
|
data_in_array = np.frombuffer(data_in, dtype=np.int16)
|
|
#print(fft_raw)
|
|
#fft_raw = fft(data_in_array)
|
|
#print(fft_raw)
|
|
#fft_raw = data_in.hex()
|
|
#print(fft_raw)
|
|
#static.FFT = fft_raw.tolist()
|
|
#fft_raw = fft_raw.tobytes()
|
|
|
|
#rate = 48000
|
|
#M = 1024
|
|
#freqs, times, Sx = signal.spectrogram(data_in_array, fs=rate, window='hanning', nperseg=1024, noverlap=M - 100, detrend=False, scaling='spectrum', return_onesided=True)
|
|
|
|
#freqs, times, Sx = signal.spectrogram(data_in_array, fs=rate, return_onesided=True, axis=-1)
|
|
|
|
|
|
|
|
|
|
#print(Sx)
|
|
|
|
#fft_raw = Sx.tobytes()
|
|
#print(fft_raw)
|
|
#static.FFT = fft_raw.hex()
|
|
#static.FFT = fft_raw
|
|
#data_in = np.frombuffer(data_in, dtype=np.int16)
|
|
#data = fft(data_in)
|
|
#print(data)
|
|
#data = getFFT(data_in, 48000, 2048)
|
|
#print(data)
|
|
|
|
#data = abs(data) * 2 / np.sum(8192)
|
|
|
|
#data = abs(data) // np.sum(1024)
|
|
|
|
|
|
#data = np.frombuffer(data_in, dtype=np.int16)
|
|
#data.resize((1,2048))
|
|
#data = np.delete(data,0)
|
|
|
|
|
|
#data = data.tobytes()
|
|
#print(data)
|
|
#static.FFT = data.tolist()
|
|
#static.FFT = data.hex()
|
|
|
|
def getFFT(data, rate, chunk_size, log_scale=False):
|
|
data = data * np.hamming(len(data))
|
|
try:
|
|
FFT = np.abs(np.fft.rfft(data)[1:])
|
|
except:
|
|
FFT = np.fft.fft(data)
|
|
left, right = np.split(np.abs(FFT), 2)
|
|
FFT = np.add(left, right[::-1])
|
|
|
|
#fftx = np.fft.fftfreq(chunk_size, d=1.0/rate)
|
|
#fftx = np.split(np.abs(fftx), 2)[0]
|
|
|
|
if log_scale:
|
|
try:
|
|
FFT = np.multiply(20, np.log10(FFT))
|
|
except Exception as e:
|
|
print('Log(FFT) failed: %s' %str(e))
|
|
|
|
return FFT
|
|
|
|
|
|
|