mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
139 lines
4.3 KiB
Python
139 lines
4.3 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 sys
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import logging
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import time
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import threading
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import sys
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import argparse
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#--------------------------------------------GET PARAMETER INPUTS
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parser = argparse.ArgumentParser(description='Simons TEST TNC')
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parser.add_argument('--bursts', dest="N_BURSTS", default=0, type=int)
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parser.add_argument('--frames', dest="N_FRAMES_PER_BURST", default=0, type=int)
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parser.add_argument('--mode', dest="FREEDV_MODE", default=0, type=int)
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parser.add_argument('--input', dest="DATA_INPUT", type=str)
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parser.add_argument('--audioinput', dest="AUDIO_INPUT", default=0, type=int)
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parser.add_argument('--debug', dest="DEBUGGING_MODE", action="store_true")
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args = parser.parse_args()
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N_BURSTS = args.N_BURSTS
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N_FRAMES_PER_BURST = args.N_FRAMES_PER_BURST
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DATA_INPUT = args.DATA_INPUT
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AUDIO_INPUT_DEVICE = args.AUDIO_INPUT
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FREEDV_MODE = args.FREEDV_MODE
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DEBUGGING_MODE = args.DEBUGGING_MODE
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# 1024 good for mode 6
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AUDIO_FRAMES_PER_BUFFER = 2048
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MODEM_SAMPLE_RATE = 8000
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#-------------------------------------------- LOAD FREEDV
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libname = "libcodec2.so"
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c_lib = ctypes.CDLL(libname)
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#--------------------------------------------CREATE PYAUDIO INSTANCE
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#--------------------------------------------GET SUPPORTED SAMPLE RATES FROM SOUND DEVICE
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#--------------------------------------------OPEN AUDIO CHANNEL RX
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if DATA_INPUT == "audio":
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p = pyaudio.PyAudio()
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AUDIO_SAMPLE_RATE_RX = int(p.get_device_info_by_index(AUDIO_INPUT_DEVICE)['defaultSampleRate'])
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stream_rx = p.open(format=pyaudio.paInt16,
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channels=1,
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rate=AUDIO_SAMPLE_RATE_RX,
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frames_per_buffer=AUDIO_FRAMES_PER_BUFFER,
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input=True,
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input_device_index=AUDIO_INPUT_DEVICE,
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)
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# GENERAL PARAMETERS
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c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
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# DATA CHANNEL INITIALISATION
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freedv = c_lib.freedv_open(FREEDV_MODE)
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bytes_per_frame = int(c_lib.freedv_get_bits_per_modem_frame(freedv)/8)
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n_max_modem_samples = c_lib.freedv_get_n_max_modem_samples(freedv)
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bytes_out = (ctypes.c_ubyte * bytes_per_frame) #bytes_per_frame
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bytes_out = bytes_out() #get pointer from bytes_out
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c_lib.freedv_set_frames_per_burst(freedv,N_FRAMES_PER_BURST)
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total_n_bytes = 0
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rx_total_frames = 0
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rx_frames = 0
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rx_bursts = 0
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receive = True
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while receive == True:
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time.sleep(0.01)
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data_in = b''
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if DATA_INPUT == "audio":
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nin = c_lib.freedv_nin(freedv)
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nin_converted = int(nin*(AUDIO_SAMPLE_RATE_RX/MODEM_SAMPLE_RATE))
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if DEBUGGING_MODE == True:
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print("-----------------------------")
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print("NIN: " + str(nin) + " [ " + str(nin_converted) + " ]")
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data_in = stream_rx.read(nin_converted, exception_on_overflow = False)
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data_in = audioop.ratecv(data_in,2,1,AUDIO_SAMPLE_RATE_RX, MODEM_SAMPLE_RATE, None)
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data_in = data_in[0].rstrip(b'\x00')
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else:
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nin = c_lib.freedv_nin(freedv)*2
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data_in = sys.stdin.buffer.read(nin)
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c_lib.freedv_rawdatarx.argtype = [ctypes.POINTER(ctypes.c_ubyte), bytes_out, data_in] # check if really neccessary
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nbytes = c_lib.freedv_rawdatarx(freedv, bytes_out, data_in) # demodulate audio
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total_n_bytes = total_n_bytes + nbytes
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if DEBUGGING_MODE == True:
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print("SYNC: " + str(c_lib.freedv_get_rx_status(freedv)))
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if nbytes == bytes_per_frame:
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rx_total_frames = rx_total_frames + 1
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rx_frames = rx_frames + 1
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if rx_frames == N_FRAMES_PER_BURST:
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rx_frames = 0
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rx_bursts = rx_bursts + 1
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#c_lib.freedv_set_sync(freedv,0) #this should be automatically done by c_lib.freedv_set_frames_per_burst(freedv,N_FRAMES_PER_BURST)
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if rx_bursts == N_BURSTS:
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receive = False
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print("------------------------------")
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print("BURSTS: " + str(rx_bursts))
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print("TOTAL RECEIVED BYTES: " + str(total_n_bytes))
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print("RECEIVED FRAMES: " + str(rx_total_frames))
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