mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
69 lines
1.8 KiB
Python
69 lines
1.8 KiB
Python
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
"""
|
|
Created on Fri Dec 11 16:58:35 2020
|
|
|
|
@author: DJ2LS
|
|
"""
|
|
|
|
|
|
import ctypes
|
|
from ctypes import *
|
|
import pathlib
|
|
|
|
import logging
|
|
import sound
|
|
|
|
|
|
|
|
class FreeDV():
|
|
|
|
def __init__(self):
|
|
|
|
libname = pathlib.Path().absolute() / "libcodec2.so"
|
|
self.c_lib = ctypes.CDLL(libname)
|
|
|
|
self.audio = sound.Audio()
|
|
|
|
|
|
self.freedv = self.c_lib.freedv_open(3)
|
|
self.bytes_per_frame = int(self.c_lib.freedv_get_bits_per_modem_frame(self.freedv)/8)
|
|
self.payload_per_frame = self.bytes_per_frame -2
|
|
|
|
|
|
logging.info("FreeDV Initialized")
|
|
|
|
|
|
# MODULATION-OUT OBJECT
|
|
def ModulationOut(self):
|
|
return (c_short * self.c_lib.freedv_get_n_nom_modem_samples(self.freedv))
|
|
|
|
# MODULATION-IN OBJECT
|
|
def ModulationIn(self):
|
|
return (c_short * self.c_lib.freedv_get_n_nom_modem_samples(self.freedv))
|
|
|
|
# DataFrame
|
|
def DataFrame(self):
|
|
return (ctypes.c_short * self.bytes_per_frame)
|
|
|
|
# GET DATA AND MODULATE IT
|
|
def Modulate(self,data_out):
|
|
|
|
mod_out = self.ModulationOut()() # new modulation object and get pointer to it
|
|
|
|
data = (ctypes.c_short * self.bytes_per_frame).from_buffer_copy(data_out)
|
|
#self.freedv_rawdatapreambletx(self.freedv, mod_out) # SEND PREAMBLE
|
|
self.c_lib.freedv_rawdatatx(self.freedv,mod_out,data) # SEND DATA
|
|
#logging.info(bytes(mod_out))
|
|
return mod_out
|
|
|
|
|
|
# DEMODULATE DATA AND RETURN IT
|
|
def Demodulate(self,modulation_in):
|
|
|
|
mod_in = self.ModulationIn()() # new modulation object and get pointer to it
|
|
data_in = self.DataFrame()()
|
|
self.c_lib.freedv_rawdatarx(self.freedv, data_in, mod_in)
|
|
|
|
return data_in
|
|
|