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/* -*- c++ -*- */
/*
* Copyright 2004 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_GR_FILE_SOURCE_H
#define INCLUDED_GR_FILE_SOURCE_H
#include <gr_core_api.h>
#include <gr_sync_block.h>
#include <boost/thread/mutex.hpp>
class gr_file_source;
typedef boost::shared_ptr<gr_file_source> gr_file_source_sptr;
GR_CORE_API gr_file_source_sptr
gr_make_file_source (size_t itemsize, const char *filename, bool repeat = false);
/*!
* \brief Read stream from file
* \ingroup source_blk
*/
class GR_CORE_API gr_file_source : public gr_sync_block
{
private:
size_t d_itemsize;
FILE *d_fp;
FILE *d_new_fp;
bool d_repeat;
bool d_updated;
protected:
gr_file_source(size_t itemsize, const char *filename, bool repeat);
void do_update();
boost::mutex fp_mutex;
public:
/*!
* \brief Create a file source.
*
* Opens \p filename as a source of items into a flowgraph. The data
* is expected to be in binary format, item after item. The \p
* itemsize of the block determines the conversion from bits to
* items.
*
* If \p repeat is turned on, the file will repeat the file after
* it's reached the end.
*
* \param itemsize the size of each item in the file, in bytes
* \param filename name of the file to source from
* \param repeat repeat file from start
*/
friend GR_CORE_API gr_file_source_sptr
gr_make_file_source(size_t itemsize,
const char *filename,
bool repeat);
~gr_file_source();
int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
/*!
* \brief Seek file to \p seek_point relative to \p whence
*
* \param seek_point sample offset in file
* \param whence one of SEEK_SET, SEEK_CUR, SEEK_END (man fseek)
*/
bool seek(long seek_point, int whence);
/*!
* \brief Opens a new file.
*
* \param filename name of the file to source from
* \param repeat repeat file from start
*/
void open(const char *filename, bool repeat);
/*!
* \brief Close the file handle.
*/
void close();
};
#endif /* INCLUDED_GR_FILE_SOURCE_H */
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