forked from sdr/gr-osmosdr
104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2012 Free Software Foundation, Inc.
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* Copyright 2012 Dimitri Stolnikov <horiz0n@gmx.net>
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_RTLSDR_SOURCE_C_H
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#define INCLUDED_RTLSDR_SOURCE_C_H
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#include <osmosdr_api.h>
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#include <gr_sync_block.h>
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#include <gruel/thread.h>
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#include <boost/circular_buffer.hpp>
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#include <boost/thread/mutex.hpp>
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#include <boost/thread/condition_variable.hpp>
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class rtl_source_c;
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typedef struct rtlsdr_dev rtlsdr_dev_t;
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/*
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* We use boost::shared_ptr's instead of raw pointers for all access
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* to gr_blocks (and many other data structures). The shared_ptr gets
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* us transparent reference counting, which greatly simplifies storage
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* management issues. This is especially helpful in our hybrid
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* C++ / Python system.
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*
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* See http://www.boost.org/libs/smart_ptr/smart_ptr.htm
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*
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* As a convention, the _sptr suffix indicates a boost::shared_ptr
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*/
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typedef boost::shared_ptr<rtl_source_c> rtl_source_c_sptr;
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/*!
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* \brief Return a shared_ptr to a new instance of rtl_source_c.
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*
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* To avoid accidental use of raw pointers, rtl_source_c's
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* constructor is private. make_rtl_source_c is the public
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* interface for creating new instances.
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*/
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OSMOSDR_API rtl_source_c_sptr make_rtl_source_c (const std::string & args = "");
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/*!
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* \brief Provides a stream of complex samples.
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* \ingroup block
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*
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*/
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class OSMOSDR_API rtl_source_c : public gr_sync_block
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{
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private:
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// The friend declaration allows make_rtl_source_c to
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// access the private constructor.
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friend OSMOSDR_API rtl_source_c_sptr make_rtl_source_c (const std::string & args);
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/*!
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* \brief Provides a stream of complex samples.
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*/
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rtl_source_c (const std::string & args); // private constructor
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public:
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~rtl_source_c (); // public destructor
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int work( int noutput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items );
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double set_center_freq( double freq );
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double set_sample_rate( double rate );
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double get_sample_rate();
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double set_gain( double gain );
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private:
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static void _rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx);
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void rtlsdr_callback(unsigned char *buf, uint32_t len);
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static void _rtlsdr_wait(rtl_source_c *obj);
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void rtlsdr_wait();
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std::vector<gr_complex> _lut;
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rtlsdr_dev_t *_dev;
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gruel::thread _thread;
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boost::circular_buffer<unsigned short> _buf;
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boost::mutex _buf_mutex;
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boost::condition_variable _buf_cond;
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};
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#endif /* INCLUDED_RTLSDR_SOURCE_C_H */
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