GNU Radio 3.4.0 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2006 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_STREAM_MUX_H 00024 #define INCLUDED_GR_STREAM_MUX_H 00025 00026 00027 #include <gr_block.h> 00028 #include <vector> 00029 00030 /*! 00031 * \brief Creates a stream muxing block to multiplex many streams into 00032 * one with a specified format. 00033 * \ingroup converter_blk 00034 * 00035 * \param itemsize the item size of the stream 00036 * \param length a vector (list/tuple) specifying the number of 00037 * items from each stream the mux together. 00038 * Warning: this requires that at least as many items 00039 * per stream are available or the system will wait 00040 * indefinitely for the items. 00041 * 00042 */ 00043 class gr_stream_mux; 00044 typedef boost::shared_ptr<gr_stream_mux> gr_stream_mux_sptr; 00045 00046 00047 00048 gr_stream_mux_sptr 00049 gr_make_stream_mux (size_t itemsize, const std::vector<int> &lengths); 00050 00051 00052 /*! 00053 * \brief Stream muxing block to multiplex many streams into 00054 * one with a specified format. 00055 * 00056 * Muxes N streams together producing an output stream that 00057 * contains N0 items from the first stream, N1 items from the second, 00058 * etc. and repeats: 00059 * 00060 * [N0, N1, N2, ..., Nm, N0, N1, ...] 00061 */ 00062 00063 class gr_stream_mux : public gr_block 00064 { 00065 friend gr_stream_mux_sptr 00066 gr_make_stream_mux (size_t itemsize, const std::vector<int> &lengths); 00067 00068 protected: 00069 gr_stream_mux (size_t itemsize, const std::vector<int> &lengths); 00070 00071 private: 00072 size_t d_itemsize; 00073 unsigned int d_stream; // index of currently selected stream 00074 int d_residual; // number if items left to put into current stream 00075 gr_vector_int d_lengths; // number if items to pack per stream 00076 00077 void increment_stream(); 00078 00079 public: 00080 ~gr_stream_mux(void); 00081 00082 void forecast (int noutput_items, gr_vector_int &ninput_items_required); 00083 00084 int general_work(int noutput_items, 00085 gr_vector_int &ninput_items, 00086 gr_vector_const_void_star &input_items, 00087 gr_vector_void_star &output_items); 00088 00089 }; 00090 00091 00092 #endif