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https://github.com/netfun2000/lcd4linux.git
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e824693d64
compile problem with missing frontend.h fixed git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@369 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/* $Id: plugin_dvb.c,v 1.2 2004/02/16 13:03:37 reinelt Exp $
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*
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* plugin for DVB status
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*
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* Copyright 2003 Michael Reinelt <reinelt@eunet.at>
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* Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* $Log: plugin_dvb.c,v $
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* Revision 1.2 2004/02/16 13:03:37 reinelt
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* compile problem with missing frontend.h fixed
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*
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* Revision 1.1 2004/02/10 06:54:39 reinelt
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* DVB plugin ported
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*
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*/
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/*
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* exported functions:
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*
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* int plugin_init_dvb (void)
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* adds dvb() function
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*
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <asm/types.h>
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#ifdef HAVE_LINUX_DVB_FRONTEND_H
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#include <linux/dvb/frontend.h>
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#else
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#warning linux/dvb/frontend.h not found: using hardcoded ioctl definitions
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#define FE_READ_BER _IOR('o', 70, __u32)
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#define FE_READ_SIGNAL_STRENGTH _IOR('o', 71, __u16)
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#define FE_READ_SNR _IOR('o', 72, __u16)
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#define FE_READ_UNCORRECTED_BLOCKS _IOR('o', 73, __u32)
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#endif
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#include "debug.h"
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#include "plugin.h"
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#include "hash.h"
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static char *frontend="/dev/dvb/adapter0/frontend0";
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static HASH DVB = { 0, };
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static int get_dvb_stats (void)
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{
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int age;
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int fd;
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unsigned short snr, sig;
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unsigned long ber, ucb;
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char val[16];
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// reread every 1000 msec only
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age=hash_age(&DVB, NULL, NULL);
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if (age>0 && age<=1000) return 0;
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// open frontend
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fd = open(frontend, O_RDONLY);
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if (fd==-1) {
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error ("open(%s) failed: %s", frontend, strerror(errno));
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return -1;
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}
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if (ioctl(fd, FE_READ_SIGNAL_STRENGTH, &sig)!=0) {
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error("ioctl(FE_READ_SIGNAL_STRENGTH) failed: %s", strerror(errno));
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sig=0;
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}
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if (ioctl(fd, FE_READ_SNR, &snr)!=0) {
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error("ioctl(FE_READ_SNR) failed: %s", strerror(errno));
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snr=0;
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}
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if (ioctl(fd, FE_READ_BER, &ber)!=0) {
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error("ioctl(FE_READ_BER) failed: %s", strerror(errno));
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ber=0;
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}
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if (ioctl(fd, FE_READ_UNCORRECTED_BLOCKS, &ucb)!=0) {
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error("ioctl(FE_READ_UNCORRECTED_BLOCKS) failed: %s", strerror(errno));
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ucb=0;
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}
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close (fd);
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snprintf (val, sizeof(val), "%f", sig/65535.0);
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hash_set (&DVB, "signal_strength", val);
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snprintf (val, sizeof(val), "%f", snr/65535.0);
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hash_set (&DVB, "snr", val);
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snprintf (val, sizeof(val), "%lu", ber);
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hash_set (&DVB, "ber", val);
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snprintf (val, sizeof(val), "%lu", ucb);
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hash_set (&DVB, "uncorrected_blocks", val);
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return 0;
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}
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static void my_dvb (RESULT *result, RESULT *arg1)
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{
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char *val;
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if (get_dvb_stats()<0) {
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SetResult(&result, R_STRING, "");
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return;
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}
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val=hash_get(&DVB, R2S(arg1));
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if (val==NULL) val="";
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SetResult(&result, R_STRING, val);
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}
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int plugin_init_dvb (void)
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{
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AddFunction ("dvb", 3, my_dvb);
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return 0;
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}
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