GNU Radio Manual and C++ API Reference  3.7.9.2
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file_source.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2012 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * GNU Radio is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 3, or (at your option)
10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with GNU Radio; see the file COPYING. If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street,
20  * Boston, MA 02110-1301, USA.
21  */
22 
23 #ifndef INCLUDED_BLOCKS_FILE_SOURCE_H
24 #define INCLUDED_BLOCKS_FILE_SOURCE_H
25 
26 #include <gnuradio/blocks/api.h>
27 #include <gnuradio/sync_block.h>
28 
29 namespace gr {
30  namespace blocks {
31 
32  /*!
33  * \brief Read stream from file
34  * \ingroup file_operators_blk
35  */
36  class BLOCKS_API file_source : virtual public sync_block
37  {
38  public:
39 
40  // gr::blocks::file_source::sptr
41  typedef boost::shared_ptr<file_source> sptr;
42 
43  /*!
44  * \brief Create a file source.
45  *
46  * Opens \p filename as a source of items into a flowgraph. The
47  * data is expected to be in binary format, item after item. The
48  * \p itemsize of the block determines the conversion from bits
49  * to items.
50  *
51  * If \p repeat is turned on, the file will repeat the file after
52  * it's reached the end.
53  *
54  * \param itemsize the size of each item in the file, in bytes
55  * \param filename name of the file to source from
56  * \param repeat repeat file from start
57  */
58  static sptr make(size_t itemsize, const char *filename, bool repeat = false);
59 
60  /*!
61  * \brief seek file to \p seek_point relative to \p whence
62  *
63  * \param seek_point sample offset in file
64  * \param whence one of SEEK_SET, SEEK_CUR, SEEK_END (man fseek)
65  */
66  virtual bool seek(long seek_point, int whence) = 0;
67 
68  /*!
69  * \brief Opens a new file.
70  *
71  * \param filename name of the file to source from
72  * \param repeat repeat file from start
73  */
74  virtual void open(const char *filename, bool repeat) = 0;
75 
76  /*!
77  * \brief Close the file handle.
78  */
79  virtual void close() = 0;
80  };
81 
82  } /* namespace blocks */
83 } /* namespace gr */
84 
85 #endif /* INCLUDED_BLOCKS_FILE_SOURCE_H */
Read stream from file.
Definition: file_source.h:36
boost::shared_ptr< file_source > sptr
Definition: file_source.h:41
Include this header to use the message passing features.
Definition: logger.h:131
#define BLOCKS_API
Definition: gr-blocks/include/gnuradio/blocks/api.h:30
synchronous 1:1 input to output with historyOverride work to provide the signal processing implementa...
Definition: sync_block.h:37
repeat each input repeat times
Definition: repeat.h:36
BLOCKS_API size_t itemsize(vector_type type)