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// ----------------------------------------------------------------------------
//
// Copyright (C) 2003-2013 Fons Adriaensen <fons@linuxaudio.org>
//
// This program 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 of the License, or
// (at your option) any later version.
//
// This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
#ifndef __LFQUEUE_H
#define __LFQUEUE_H
class Fltlfq
{
public:
Fltlfq (int size, int chan);
~Fltlfq (void);
void reset (void) { _nwr = _iwr = _nrd = _ird = 0; }
int size (void) const { return _size; }
int chan (void) const { return _chan; }
float *wr_ptr (void) const { return _data + (_iwr * _chan); }
int wr_frames (void) const { return _size - (_nwr - _nrd); }
int wr_nowrap (int n) const { return (_size - _iwr < n) ? (_size - _iwr) : n; }
void wr_commit (int n)
{
_nwr += n;
_iwr += n;
if (_iwr >= _size) _iwr -= _size;
}
float *rd_ptr (void) { return _data + (_ird * _chan); }
int rd_frames (void) const { return _nwr - _nrd; }
int rd_nowrap (int n) const { return (_size - _ird < n) ? (_size - _ird) : n; }
void rd_commit (int n)
{
_nrd += n;
_ird += n;
if (_ird >= _size) _ird -= _size;
}
private:
int _size;
int _chan;
int _nwr;
int _iwr;
int _nrd;
int _ird;
float *_data;
};
#endif
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