GNU Radio C++ API
gr_file_source.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2004 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_GR_FILE_SOURCE_H
24 #define INCLUDED_GR_FILE_SOURCE_H
25 
26 #include <gr_core_api.h>
27 #include <gr_sync_block.h>
28 
29 class gr_file_source;
31 
33 gr_make_file_source (size_t itemsize, const char *filename, bool repeat = false);
34 
35 /*!
36  * \brief Read stream from file
37  * \ingroup source_blk
38  */
39 
41 {
42  friend GR_CORE_API gr_file_source_sptr gr_make_file_source (size_t itemsize,
43  const char *filename,
44  bool repeat);
45  private:
46  size_t d_itemsize;
47  void *d_fp;
48  bool d_repeat;
49 
50  protected:
51  gr_file_source (size_t itemsize, const char *filename, bool repeat);
52 
53  public:
54  ~gr_file_source ();
55 
56  int work (int noutput_items,
57  gr_vector_const_void_star &input_items,
58  gr_vector_void_star &output_items);
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  bool seek (long seek_point, int whence);
67 };
68 
69 #endif /* INCLUDED_GR_FILE_SOURCE_H */