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