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/* -*- c++ -*- */
/*
* Copyright 2012 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_BLOCKS_FILE_META_SOURCE_IMPL_H
#define INCLUDED_BLOCKS_FILE_META_SOURCE_IMPL_H
#include <blocks/file_meta_source.h>
#include <gr_tags.h>
#include <gruel/pmt.h>
#include <gruel/thread.h>
#include <blocks/file_meta_sink.h>
using namespace pmt;
namespace gr {
namespace blocks {
class file_meta_source_impl : public file_meta_source
{
private:
enum meta_state_t {
STATE_INLINE=0,
STATE_DETACHED
};
size_t d_itemsize;
double d_samp_rate;
pmt_t d_time_stamp;
size_t d_seg_size;
bool d_updated;
bool d_repeat;
gruel::mutex d_mutex;
FILE *d_new_fp, *d_new_hdr_fp;
FILE *d_fp, *d_hdr_fp;
meta_state_t d_state;
std::vector<gr_tag_t> d_tags;
protected:
bool _open(FILE **fp, const char *filename);
bool read_header(pmt_t &hdr, pmt_t &extras);
void parse_header(pmt_t hdr, uint64_t offset,
std::vector<gr_tag_t> &tags);
void parse_extras(pmt_t extras, uint64_t offset,
std::vector<gr_tag_t> &tags);
public:
file_meta_source_impl(const std::string &filename,
bool repeat=false,
bool detached_header=false,
const std::string &hdr_filename="");
~file_meta_source_impl();
bool open(const std::string &filename,
const std::string &hdr_filename="");
void close();
void do_update();
int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
} /* namespace blocks */
} /* namespace gr */
#endif /* INCLUDED_BLOCKS_FILE_META_SOURCE_IMPL_H */
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