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/* -*- c++ -*- */
/*
* Copyright 2008,2009,2013 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_WAVFILE_SINK_IMPL_H
#define INCLUDED_GR_WAVFILE_SINK_IMPL_H
#include <gnuradio/blocks/wavfile_sink.h>
namespace gr {
namespace blocks {
class wavfile_sink_impl : public wavfile_sink
{
private:
unsigned d_sample_rate;
int d_nchans;
unsigned d_sample_count;
int d_bytes_per_sample;
int d_bytes_per_sample_new;
int d_max_sample_val;
int d_min_sample_val;
int d_normalize_shift;
int d_normalize_fac;
FILE *d_fp;
FILE *d_new_fp;
bool d_updated;
boost::mutex d_mutex;
/*!
* \brief Convert a sample value within [-1;+1] to a corresponding
* short integer value
*/
short convert_to_short(float sample);
/*!
* \brief If any file changes have occurred, update now. This is called
* internally by work() and thus doesn't usually need to be called by
* hand.
*/
void do_update();
/*!
* \brief Writes information to the WAV header which is not available
* a-priori (chunk size etc.) and closes the file. Not thread-safe and
* assumes d_fp is a valid file pointer, should thus only be called by
* other methods.
*/
void close_wav();
protected:
bool stop();
public:
wavfile_sink_impl(const char *filename,
int n_channels,
unsigned int sample_rate,
int bits_per_sample);
~wavfile_sink_impl();
bool open(const char* filename);
void close();
void set_sample_rate(unsigned int sample_rate);
void set_bits_per_sample(int bits_per_sample);
int bits_per_sample();
unsigned int sample_rate();
int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
} /* namespace blocks */
} /* namespace gr */
#endif /* INCLUDED_GR_WAVFILE_SINK_IMPL_H */
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