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/*
* Copyright (C) 2013-2014 Robin Gareus <robin@gareus.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 2 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __libardour_mididm_h__
#define __libardour_mididm_h__
#include "ardour/types.h"
#include "ardour/libardour_visibility.h"
namespace ARDOUR {
class PortEngine;
class LIBARDOUR_API MIDIDM
{
public:
MIDIDM (framecnt_t sample_rate);
int process (pframes_t nframes, PortEngine &pe, void *midi_in, void *midi_out);
framecnt_t latency (void) { return _cnt_total > 10 ? _avg_delay : 0; }
framecnt_t processed (void) { return _cnt_total; }
double deviation (void) { return _cnt_total > 1 ? sqrt(_var_s / ((double)(_cnt_total - 1))) : 0; }
bool ok (void) { return _cnt_total > 200; }
bool have_signal (void) { return (_monotonic_cnt - _last_signal_tme) < (uint64_t) _sample_rate ; }
private:
int64_t parse_mclk (uint8_t* buf, pframes_t timestamp) const;
int64_t parse_mtc (uint8_t* buf, pframes_t timestamp) const;
framecnt_t _sample_rate;
uint64_t _monotonic_cnt;
uint64_t _last_signal_tme;
uint64_t _cnt_total;
uint64_t _dly_total;
uint32_t _min_delay;
uint32_t _max_delay;
double _avg_delay;
double _var_m;
double _var_s;
};
}
#endif /* __libardour_mididm_h__ */
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