/usr/include/gr_air_modes/preamble.h is in gr-air-modes 0.0.0.e47992d-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright 2013 Nick Foster
#
# This file is part of gr-air-modes
#
# gr-air-modes 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.
#
# gr-air-modes 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 gr-air-modes; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
*/
#ifndef INCLUDED_AIR_MODES_PREAMBLE_H
#define INCLUDED_AIR_MODES_PREAMBLE_H
#include <gnuradio/block.h>
#include <gr_air_modes/api.h>
namespace gr {
namespace air_modes {
/*!
* \brief mode select preamble detection
* \ingroup block
*/
class AIR_MODES_API preamble : virtual public gr::block
{
public:
typedef boost::shared_ptr<preamble> sptr;
static sptr make(int channel_rate, float threshold_db);
virtual void set_rate(int channel_rate) = 0;
virtual void set_threshold(float threshold_db) = 0;
virtual int get_rate(void) = 0;
virtual float get_threshold(void) = 0;
};
} // namespace air_modes
} // namespace gr
#endif /* INCLUDED_AIR_MODES_PREAMBLE_H */
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