1 files changed, 63 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/general/gr_throttle.h b/gnuradio-core/src/lib/general/gr_throttle.h
new file mode 100644
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+++ b/gnuradio-core/src/lib/general/gr_throttle.h
@@ -0,0 +1,63 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio 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.
+ * 
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#ifndef INCLUDED_GR_THROTTLE_H
+#define INCLUDED_GR_THROTTLE_H
+
+#include <gr_sync_block.h>
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+class gr_throttle;
+typedef boost::shared_ptr<gr_throttle> gr_throttle_sptr;
+
+
+gr_throttle_sptr gr_make_throttle(size_t itemsize, double samples_per_sec);
+
+/*!
+ * \brief throttle flow of samples such that the average rate does not exceed samples_per_sec.
+ * \ingroup block
+ *
+ * input: one stream of itemsize; output: one stream of itemsize
+ */
+class gr_throttle : public gr_sync_block
+{
+  friend gr_throttle_sptr gr_make_throttle(size_t itemsize, double samples_per_sec);
+  size_t		d_itemsize;
+  double		d_samples_per_sec;
+  double		d_total_samples;
+#ifdef HAVE_SYS_TIME_H
+  struct timeval	d_start;
+#endif
+
+  gr_throttle(size_t itemsize, double samples_per_sec);
+
+public:
+  ~gr_throttle();
+
+  int work (int noutput_items,
+	    gr_vector_const_void_star &input_items,
+	    gr_vector_void_star &output_items);
+};
+ 
+
+#endif /* INCLUDED_GR_THROTTLE_H */