Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / guicast / bctimer.h

diff --git a/cinelerra-5.1/guicast/bctimer.h b/cinelerra-5.1/guicast/bctimer.h
new file mode 100644 (file)
index 0000000..32e486f
--- /dev/null
+++ b/cinelerra-5.1/guicast/bctimer.h
@@ -0,0 +1,56 @@
+
+/*
+ * CINELERRA
+ * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
+ *
+ * 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
+ *
+ */
+
+#ifndef BCTIMER_H
+#define BCTIMER_H
+
+#include <stdint.h>
+#include <sys/time.h>
+
+
+class Timer
+{
+public:
+       Timer();
+       virtual ~Timer();
+
+// set last update to now
+       int update();
+// subtract milliseconds from current difference
+       void subtract(int64_t value);
+
+// get difference between now and last update in milliseconds
+// must be positive or error results
+       int64_t get_difference(struct timeval *result); // also stores in timeval
+       int64_t get_difference();
+
+// get difference in arbitrary units between now and last update
+       int64_t get_scaled_difference(long denominator);
+       static int delay(long milliseconds);
+
+private:
+       struct timeval current_time;
+       struct timeval new_time;
+};
+
+
+
+#endif