--- /dev/null
+/* -*- c++ -*- */
+/*
+ * Copyright 2009 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 3, 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., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GR_HISTO_SINK_F_H
+#define INCLUDED_GR_HISTO_SINK_F_H
+
+#include <gr_sync_block.h>
+#include <gr_msg_queue.h>
+#include <pthread.h>
+
+class gr_histo_sink_f;
+typedef boost::shared_ptr<gr_histo_sink_f> gr_histo_sink_f_sptr;
+
+gr_histo_sink_f_sptr gr_make_histo_sink_f (gr_msg_queue_sptr msgq);
+
+/*!
+ * \brief Histogram module.
+ * \ingroup sink_blk
+ */
+class gr_histo_sink_f : public gr_sync_block
+{
+private:
+ gr_msg_queue_sptr d_msgq;
+ unsigned int d_num_bins;
+ unsigned int d_frame_size;
+ unsigned int d_sample_count;
+ unsigned int *d_bins;
+ float *d_samps;
+ pthread_mutex_t d_mutex;
+
+ friend gr_histo_sink_f_sptr gr_make_histo_sink_f (gr_msg_queue_sptr msgq);
+ gr_histo_sink_f (gr_msg_queue_sptr msgq);
+ void send_frame(void);
+ void clear(void);
+
+public:
+ ~gr_histo_sink_f (void);
+
+ int work (int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items);
+
+ unsigned int get_frame_size(void);
+ unsigned int get_num_bins(void);
+
+ void set_frame_size(unsigned int frame_size);
+ void set_num_bins(unsigned int num_bins);
+
+};
+
+#endif /* INCLUDED_GR_HISTO_SINK_F_H */