[lcd4linux @ 2004-02-10 06:54:38 by reinelt]

DVB plugin ported

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@360 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

1 files changed, 137 insertions, 0 deletions

diff --git a/plugin_dvb.c b/plugin_dvb.c
new file mode 100644
index 0000000..b44f396
--- /dev/null
+++ b/plugin_dvb.c
@@ -0,0 +1,137 @@
+/* $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;
+}
+