88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
/* -*- C++ -*- */
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/*
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* Copyright 2008 Steve Glass
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*
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* This file is part of OP25.
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*
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* OP25 is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* OP25 is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with OP25; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Boston, MA
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* 02110-1301, USA.
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*/
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#include <cerrno>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <fcntl.h>
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#include <sstream>
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#include <stdexcept>
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#include <stdint.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <termios.h>
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#include <vc55_imbe_decoder.h>
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#include <op25_yank.h>
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using namespace std;
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vc55_imbe_decoder::vc55_imbe_decoder()
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{
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const char *dev = getenv("IMBE_DEV");
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const char *default_dev = "/dev/ttyS0";
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dev = dev ? dev : default_dev;
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d_fd = open(dev, O_WRONLY | O_NOCTTY);
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if(-1 != d_fd) {
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struct termios options;
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if(-1 != tcgetattr(d_fd, &options)) {
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cfsetospeed(&options, B115200);
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options.c_cflag |= (CLOCAL | CREAD | CS8);
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options.c_cflag &= ~(CSTOPB | PARENB | CRTSCTS | IXON);
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if(-1 == tcsetattr(d_fd, TCSANOW, &options)) {
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ostringstream msg;
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msg << "tcsetattr(fd, TCSANOW, &options): " << strerror(errno) << endl;
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msg << "func: " << __PRETTY_FUNCTION__ << endl;
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msg << "file: " << __FILE__ << endl;
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msg << "line: " << __LINE__ << endl;
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throw runtime_error(msg.str());
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}
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}
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} else {
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perror("open(dev, O_WRONLY | O_NOCTTY)"); // a warning, not an error
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}
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}
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vc55_imbe_decoder::~vc55_imbe_decoder()
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{
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if(-1 != d_fd) {
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close(d_fd);
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}
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}
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void
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vc55_imbe_decoder::decode(const voice_codeword& cw)
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{
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if(-1 != d_fd) {
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uint8_t packet[20];
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packet[0] = 0x56;
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packet[1] = 0xf0;
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extract(cw, 0, 144, &packet[2]);
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if(-1 == write(d_fd, packet, sizeof(packet))) {
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perror("write(d_fd, packet, sizeof(packet))");
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close(d_fd);
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d_fd = -1;
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}
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}
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}
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