3 * Copyright 2004 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
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)
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.
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.
23 #ifndef INCLUDED_GR_SYNC_BLOCK_H
24 #define INCLUDED_GR_SYNC_BLOCK_H
29 * \brief synchronous 1:1 input to output with history
32 * Override work to provide the signal processing implementation.
34 class gr_sync_block : public gr_block
38 gr_sync_block (const std::string &name,
39 gr_io_signature_sptr input_signature,
40 gr_io_signature_sptr output_signature);
45 * \brief just like gr_block::general_work, only this arranges to call consume_each for you
47 * The user must override work to define the signal processing code
49 virtual int work (int noutput_items,
50 gr_vector_const_void_star &input_items,
51 gr_vector_void_star &output_items) = 0;
54 // gr_sync_block overrides these to assist work
55 void forecast (int noutput_items, gr_vector_int &ninput_items_required);
56 int general_work (int noutput_items,
57 gr_vector_int &ninput_items,
58 gr_vector_const_void_star &input_items,
59 gr_vector_void_star &output_items);
61 int fixed_rate_ninput_to_noutput(int ninput);
62 int fixed_rate_noutput_to_ninput(int noutput);
65 #endif /* INCLUDED_GR_SYNC_BLOCK_H */