moved veejay-devel to veejay-current (current branch re-opened)

git-svn-id: svn://code.dyne.org/veejay/trunk@510 eb8d1916-c9e9-0310-b8de-cf0c9472ead5

veejay-current/utils/mjpeg_logging.c

@@ -0,0 +1,218 @@
+/*
+    $Id: mjpeg_logging.c,v 1.1.1.1 2004/10/27 23:48:57 niels Exp $
+
+    Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
+
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+
+extern int fred;
+#include "mjpeg_logging.h"
+
+static const char _rcsid[] = "$Id: ";
+
+#define MAX_DEFAULT_ID_SIZE 16
+#define DEFAULT_DEFAULT_ID "???"
+
+#ifdef HAVE___PROGNAME
+extern const char *__progname;
+#endif
+
+static log_level_t mjpeg_log_verbosity = 0;
+static char default_handler_id[MAX_DEFAULT_ID_SIZE];
+static char default_handler_id_is_set = 0;
+
+static int default_mjpeg_log_filter( log_level_t level )
+{
+  int verb_from_env;
+  if( mjpeg_log_verbosity == 0 )
+    {
+      char *mjpeg_verb_env = getenv("MJPEG_VERBOSITY");
+      if( mjpeg_verb_env != NULL )
+        {
+          verb_from_env = LOG_WARN-atoi(mjpeg_verb_env);
+          if( verb_from_env >= LOG_DEBUG && verb_from_env <= LOG_ERROR )
+            mjpeg_log_verbosity = verb_from_env;
+        }
+    }
+  return (level < LOG_WARN && level < mjpeg_log_verbosity);
+}
+
+static mjpeg_log_filter_t _filter = default_mjpeg_log_filter;
+
+static void
+default_mjpeg_log_handler(log_level_t level, const char message[])
+{
+  if( (*_filter)( level ) )
+    return;
+  switch(level) {
+  case LOG_ERROR:
+    fprintf(stderr, "E: %s\n", message);
+    break;
+  case LOG_DEBUG:
+    fprintf(stderr, "D: %s\n", message);
+    break;
+  case LOG_WARN:
+    fprintf(stderr, "W: %s\n", message);
+    break;
+  case LOG_INFO:
+    fprintf(stderr, "I: %s\n", message);
+    break;
+  default:
+    assert(0);
+  }
+}
+
+static mjpeg_log_handler_t _handler = default_mjpeg_log_handler;
+
+
+mjpeg_log_handler_t
+mjpeg_log_set_handler(mjpeg_log_handler_t new_handler)
+{
+  mjpeg_log_handler_t old_handler = _handler;
+
+  _handler = new_handler;
+
+  return old_handler;
+}
+
+/***************
+ *
+ * Set default log handlers degree of verboseity.
+ * 0 = quiet, 1 = info, 2 = debug
+ *
+ *************/
+
+int
+mjpeg_default_handler_verbosity(int verbosity)
+{
+  int prev_verb = mjpeg_log_verbosity;
+  mjpeg_log_verbosity = LOG_WARN - verbosity;
+  return prev_verb;
+}
+
+/*
+ * Set identifier string used by default handler
+ *
+ */
+int
+mjpeg_default_handler_identifier(const char *new_id)
+{
+  const char *s;
+  if (new_id == NULL) {
+    default_handler_id_is_set = 0;
+    return 0;
+  }
+  /* find basename of new_id (remove any directory prefix) */
+  if ((s = strrchr(new_id, '/')) == NULL)
+    s = new_id;
+  else
+    s = s + 1;
+  strncpy(default_handler_id, s, MAX_DEFAULT_ID_SIZE);
+  default_handler_id[MAX_DEFAULT_ID_SIZE-1] = '\0';
+  default_handler_id_is_set = 1;
+  return 0;
+}
+
+
+static void
+mjpeg_logv(log_level_t level, const char format[], va_list args)
+{
+  char buf[1024] = { 0, };
+
+  /* TODO: Original had a re-entrancy error trap to assist bug
+     finding.  To make this work with multi-threaded applications a
+     lock is needed hence delete.
+  */
+
+  
+  vsnprintf(buf, sizeof(buf)-1, format, args);
+
+  _handler(level, buf);
+}
+
+void
+mjpeg_log(log_level_t level, const char format[], ...)
+{
+  va_list args;
+  va_start (args, format);
+  mjpeg_logv(level, format, args);
+  va_end (args);
+}
+
+void
+mjpeg_debug(const char format[], ...)
+{
+  va_list args;
+  va_start (args, format);
+  mjpeg_logv(LOG_DEBUG, format, args);
+  va_end (args);
+}
+
+void
+mjpeg_info(const char format[], ...)
+{
+  va_list args;
+  va_start (args, format);
+  mjpeg_logv(LOG_INFO, format, args);
+  va_end (args);
+}
+
+void
+mjpeg_warn(const char format[], ...)
+{
+  va_list args;
+  va_start (args, format);
+  mjpeg_logv(LOG_WARN, format, args);
+  va_end (args);
+}
+
+void
+mjpeg_error(const char format[], ...)
+{
+  va_list args;
+  va_start (args, format);
+  mjpeg_logv(LOG_ERROR, format, args);
+  va_end (args);
+}
+
+void
+mjpeg_error_exit1(const char format[], ...)
+{
+  va_list args;
+  va_start( args, format );
+  mjpeg_logv( LOG_ERROR, format, args);
+  va_end(args);           
+  exit(EXIT_FAILURE);
+}
+
+
+/* 
+ * Local variables:
+ *  c-file-style: "gnu"
+ *  tab-width: 8
+ *  indent-tabs-mode: nil
+ * End:
+ */