GNU Radio 3.4.0 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_MESSAGE_SOURCE_H 00024 #define INCLUDED_GR_MESSAGE_SOURCE_H 00025 00026 #include <gr_sync_block.h> 00027 #include <gr_message.h> 00028 #include <gr_msg_queue.h> 00029 00030 class gr_message_source; 00031 typedef boost::shared_ptr<gr_message_source> gr_message_source_sptr; 00032 00033 gr_message_source_sptr gr_make_message_source (size_t itemsize, int msgq_limit=0); 00034 gr_message_source_sptr gr_make_message_source (size_t itemsize, gr_msg_queue_sptr msgq); 00035 00036 /*! 00037 * \brief Turn received messages into a stream 00038 * \ingroup source_blk 00039 */ 00040 class gr_message_source : public gr_sync_block 00041 { 00042 private: 00043 size_t d_itemsize; 00044 gr_msg_queue_sptr d_msgq; 00045 gr_message_sptr d_msg; 00046 unsigned d_msg_offset; 00047 bool d_eof; 00048 00049 friend gr_message_source_sptr 00050 gr_make_message_source(size_t itemsize, int msgq_limit); 00051 friend gr_message_source_sptr 00052 gr_make_message_source(size_t itemsize, gr_msg_queue_sptr msgq); 00053 00054 protected: 00055 gr_message_source (size_t itemsize, int msgq_limit); 00056 gr_message_source (size_t itemsize, gr_msg_queue_sptr msgq); 00057 00058 public: 00059 ~gr_message_source (); 00060 00061 gr_msg_queue_sptr msgq() const { return d_msgq; } 00062 00063 int work (int noutput_items, 00064 gr_vector_const_void_star &input_items, 00065 gr_vector_void_star &output_items); 00066 }; 00067 00068 #endif /* INCLUDED_GR_MESSAGE_SOURCE_H */