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-rw-r--r--plugin_dvb.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/plugin_dvb.c b/plugin_dvb.c
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+++ b/plugin_dvb.c
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+/* $Id: plugin_dvb.c,v 1.1 2004/02/10 06:54:39 reinelt Exp $
+ *
+ * plugin for DVB status
+ *
+ * Copyright 2003 Michael Reinelt <reinelt@eunet.at>
+ * Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * $Log: plugin_dvb.c,v $
+ * Revision 1.1 2004/02/10 06:54:39 reinelt
+ * DVB plugin ported
+ *
+ */
+
+/*
+ * exported functions:
+ *
+ * int plugin_init_dvb (void)
+ * adds dvb() function
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+
+#include <linux/dvb/frontend.h>
+
+#include "debug.h"
+#include "plugin.h"
+#include "hash.h"
+
+static char *frontend="/dev/dvb/adapter0/frontend0";
+
+static HASH DVB = { 0, };
+
+static int get_dvb_stats (void)
+{
+ int age;
+ int fd;
+ unsigned short snr, sig;
+ unsigned long ber, ucb;
+ char val[16];
+
+ // reread every 1000 msec only
+ age=hash_age(&DVB, NULL, NULL);
+ if (age>0 && age<=1000) return 0;
+
+ // open frontend
+ fd = open(frontend, O_RDONLY);
+ if (fd==-1) {
+ error ("open(%s) failed: %s", frontend, strerror(errno));
+ return -1;
+ }
+
+ if (ioctl(fd, FE_READ_SIGNAL_STRENGTH, &sig)!=0) {
+ error("ioctl(FE_READ_SIGNAL_STRENGTH) failed: %s", strerror(errno));
+ sig=0;
+ }
+
+ if (ioctl(fd, FE_READ_SNR, &snr)!=0) {
+ error("ioctl(FE_READ_SNR) failed: %s", strerror(errno));
+ snr=0;
+ }
+
+ if (ioctl(fd, FE_READ_BER, &ber)!=0) {
+ error("ioctl(FE_READ_BER) failed: %s", strerror(errno));
+ ber=0;
+ }
+
+ if (ioctl(fd, FE_READ_UNCORRECTED_BLOCKS, &ucb)!=0) {
+ error("ioctl(FE_READ_UNCORRECTED_BLOCKS) failed: %s", strerror(errno));
+ ucb=0;
+ }
+
+ close (fd);
+
+ snprintf (val, sizeof(val), "%f", sig/65535.0);
+ hash_set (&DVB, "signal_strength", val);
+
+ snprintf (val, sizeof(val), "%f", snr/65535.0);
+ hash_set (&DVB, "snr", val);
+
+ snprintf (val, sizeof(val), "%lu", ber);
+ hash_set (&DVB, "ber", val);
+
+ snprintf (val, sizeof(val), "%lu", ucb);
+ hash_set (&DVB, "uncorrected_blocks", val);
+
+ return 0;
+}
+
+
+static void my_dvb (RESULT *result, RESULT *arg1)
+{
+ char *val;
+
+ if (get_dvb_stats()<0) {
+ SetResult(&result, R_STRING, "");
+ return;
+ }
+
+ val=hash_get(&DVB, R2S(arg1));
+ if (val==NULL) val="";
+
+ SetResult(&result, R_STRING, val);
+}
+
+int plugin_init_dvb (void)
+{
+ AddFunction ("dvb", 3, my_dvb);
+ return 0;
+}
+