GNU Radio 3.5.3.2 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2005 Free Software Foundation, Inc. 00004 * 00005 * This file is part of GNU Radio 00006 * 00007 * GNU Radio is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 3, or (at your option) 00010 * any later version. 00011 * 00012 * GNU Radio is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with GNU Radio; see the file COPYING. If not, write to 00019 * the Free Software Foundation, Inc., 51 Franklin Street, 00020 * Boston, MA 02110-1301, USA. 00021 */ 00022 00023 #ifndef INCLUDED_GR_SKIPHEAD_H 00024 #define INCLUDED_GR_SKIPHEAD_H 00025 00026 #include <gr_core_api.h> 00027 #include <gr_sync_block.h> 00028 #include <stddef.h> // size_t 00029 00030 class gr_skiphead; 00031 typedef boost::shared_ptr<gr_skiphead> gr_skiphead_sptr; 00032 00033 GR_CORE_API gr_skiphead_sptr 00034 gr_make_skiphead (size_t itemsize, uint64_t nitems_to_skip); 00035 00036 00037 /*! 00038 * \brief skips the first N items, from then on copies items to the output 00039 * \ingroup slicedice_blk 00040 * 00041 * Useful for building test cases and sources which have metadata or junk at the start 00042 */ 00043 00044 class GR_CORE_API gr_skiphead : public gr_block 00045 { 00046 friend GR_CORE_API gr_skiphead_sptr gr_make_skiphead (size_t itemsize, uint64_t nitems_to_skip); 00047 gr_skiphead (size_t itemsize, uint64_t nitems_to_skip); 00048 00049 uint64_t d_nitems_to_skip; 00050 uint64_t d_nitems; // total items seen 00051 00052 public: 00053 00054 int general_work(int noutput_items, 00055 gr_vector_int &ninput_items, 00056 gr_vector_const_void_star &input_items, 00057 gr_vector_void_star &output_items); 00058 }; 00059 00060 #endif /* INCLUDED_GR_SKIPHEAD_H */