1 files changed, 89 insertions, 0 deletions
diff --git a/common.c b/common.c
new file mode 100644
index 0000000..1ff6b65
--- /dev/null
+++ b/common.c
@@ -0,0 +1,89 @@
+#include "common.h"
+
+void log(int level, const char * fmt, ...) {
+  char tmpstr[BUFSIZ];
+  char timestr[16];
+  va_list ap;
+  time_t now;
+  struct tm local;
+
+  if (PvrSetup.LogLevel >= level) {
+    va_start(ap, fmt);
+    time(&now);
+    localtime_r(&now, &local);
+    vsnprintf(tmpstr, sizeof(tmpstr), fmt, ap);
+    strftime(timestr, sizeof(timestr), "%H:%M:%S", &local);
+    printf("pvrinput: %s %s\n", timestr, tmpstr);
+    switch (level) {
+      case pvrERROR:
+         esyslog("%s",tmpstr);
+         break;
+      case pvrINFO:
+         isyslog("%s",tmpstr);
+         break;
+      case pvrDEBUG1:
+      case pvrDEBUG2:
+      default:
+         dsyslog("%s",tmpstr);
+         break;
+      }
+    va_end(ap);
+    }
+}
+
+/*
+function IOCTL
+retries the ioctl given six times before giving up,
+improves stability if device/driver is actually busy
+*/
+int IOCTL(int fd, int cmd, void *data) {
+  if (fd <0) {
+    log(pvrERROR, "Error IOCTL %s: %s is not open", cmd, fd);
+    return (-1);
+    }
+  for (int retry = 5; retry >= 0; ) {
+    if (ioctl(fd, cmd, data) != 0) {
+      if (retry){
+        usleep(20000); /* 20msec */
+        retry--;
+        continue;
+        }
+      return -1;
+      }
+    else
+      return 0;  /* all went okay :) */
+    }
+  return 0;  /* should never reach this */
+}
+
+/*
+This function takes a ivtv V4L2 integer value
+and returns it as rounded 0..100% integer value
+-wirbel-
+*/
+
+int IntVal2Percent(int NumVal, int MinVal, int MaxVal){
+ double t=0;
+ log(pvrDEBUG1, "IntVal2Percent(NumVal=%d, MinVal=%d, MaxVal=%d)\n",
+    NumVal, MinVal, MaxVal);    
+ t=(double) (MaxVal - MinVal);
+ t=(NumVal-MinVal)/t;    
+ t=100.0*t + 0.5;    /* rounding to nearest int) */
+ return (int) t;
+}
+
+/*
+This function takes a 0..100% integer value
+and returns it as rounded ivtv V4L2 integer value
+-wirbel-
+*/
+
+int Percent2IntVal(int Percent, int MinVal, int MaxVal){
+ double t=0;
+ log(pvrDEBUG1, "Percent2IntVal(Percent=%d, MinVal=%d, MaxVal=%d)\n",
+    Percent, MinVal, MaxVal);
+ t=Percent/100.0;
+ t=0.5 + t*(MaxVal-MinVal);  /* +0.5 is rounding to int */
+ t=MinVal+t;
+ return (int) t;
+}