GNU Radio 3.6.5 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2012 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_BLOCKS_FILE_META_SOURCE_IMPL_H 00024 #define INCLUDED_BLOCKS_FILE_META_SOURCE_IMPL_H 00025 00026 #include <blocks/file_meta_source.h> 00027 #include <gr_tags.h> 00028 #include <gruel/pmt.h> 00029 #include <gruel/thread.h> 00030 00031 #include <blocks/file_meta_sink.h> 00032 00033 using namespace pmt; 00034 00035 namespace gr { 00036 namespace blocks { 00037 00038 class file_meta_source_impl : public file_meta_source 00039 { 00040 private: 00041 enum meta_state_t { 00042 STATE_INLINE=0, 00043 STATE_DETACHED 00044 }; 00045 00046 size_t d_itemsize; 00047 double d_samp_rate; 00048 pmt_t d_time_stamp; 00049 size_t d_seg_size; 00050 bool d_updated; 00051 bool d_repeat; 00052 00053 gruel::mutex d_mutex; 00054 FILE *d_new_fp, *d_new_hdr_fp; 00055 FILE *d_fp, *d_hdr_fp; 00056 meta_state_t d_state; 00057 00058 std::vector<gr_tag_t> d_tags; 00059 00060 protected: 00061 bool _open(FILE **fp, const char *filename); 00062 bool read_header(pmt_t &hdr, pmt_t &extras); 00063 void parse_header(pmt_t hdr, uint64_t offset, 00064 std::vector<gr_tag_t> &tags); 00065 void parse_extras(pmt_t extras, uint64_t offset, 00066 std::vector<gr_tag_t> &tags); 00067 00068 public: 00069 file_meta_source_impl(const std::string &filename, 00070 bool repeat=false, 00071 bool detached_header=false, 00072 const std::string &hdr_filename=""); 00073 00074 ~file_meta_source_impl(); 00075 00076 bool open(const std::string &filename, 00077 const std::string &hdr_filename=""); 00078 void close(); 00079 void do_update(); 00080 00081 int work(int noutput_items, 00082 gr_vector_const_void_star &input_items, 00083 gr_vector_void_star &output_items); 00084 }; 00085 00086 } /* namespace blocks */ 00087 } /* namespace gr */ 00088 00089 #endif /* INCLUDED_BLOCKS_FILE_META_SOURCE_IMPL_H */