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Diffstat (limited to 'gnuradio-runtime/include/gr_sync_decimator.h')
| -rw-r--r-- | gnuradio-runtime/include/gr_sync_decimator.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/gnuradio-runtime/include/gr_sync_decimator.h b/gnuradio-runtime/include/gr_sync_decimator.h new file mode 100644 index 0000000000..c799ee0f7c --- /dev/null +++ b/gnuradio-runtime/include/gr_sync_decimator.h @@ -0,0 +1,69 @@ +/* -*- c++ -*- */ +/* + * Copyright 2004 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio 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. + * + * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef INCLUDED_GR_SYNC_DECIMATOR_H +#define INCLUDED_GR_SYNC_DECIMATOR_H + +#include <gr_runtime_api.h> +#include <gr_sync_block.h> + +/*! + * \brief synchronous N:1 input to output with history + * \ingroup base_blk + * + * Override work to provide the signal processing implementation. + */ +class GR_RUNTIME_API gr_sync_decimator : public gr_sync_block +{ + private: + unsigned d_decimation; + + protected: + gr_sync_decimator (void){} //allows pure virtual interface sub-classes + gr_sync_decimator (const std::string &name, + gr_io_signature_sptr input_signature, + gr_io_signature_sptr output_signature, + unsigned decimation); + public: + + unsigned decimation () const { return d_decimation; } + void set_decimation (unsigned decimation) + { + d_decimation = decimation; + set_relative_rate (1.0 / decimation); + } + + // gr_sync_decimator overrides these to assist work + void forecast (int noutput_items, gr_vector_int &ninput_items_required); + int general_work (int noutput_items, + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + + // derived classes should override work + + int fixed_rate_ninput_to_noutput(int ninput); + int fixed_rate_noutput_to_ninput(int noutput); +}; + + +#endif /* INCLUDED_GR_SYNC_DECIMATOR_H */ |