65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
/*
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* Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __libardour_mididm_h__
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#define __libardour_mididm_h__
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#include "ardour/types.h"
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#include "ardour/libardour_visibility.h"
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namespace ARDOUR {
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class PortEngine;
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class LIBARDOUR_API MIDIDM
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{
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public:
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MIDIDM (samplecnt_t sample_rate);
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int process (pframes_t nframes, PortEngine &pe, void *midi_in, void *midi_out);
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samplecnt_t latency (void) { return _cnt_total > 10 ? _avg_delay : 0; }
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samplecnt_t processed (void) { return _cnt_total; }
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double deviation (void) { return _cnt_total > 1 ? sqrt(_var_s / ((double)(_cnt_total - 1))) : 0; }
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bool ok (void) { return _cnt_total > 200; }
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bool have_signal (void) { return (_monotonic_cnt - _last_signal_tme) < (uint64_t) _sample_rate ; }
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private:
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int64_t parse_mclk (uint8_t const * const buf, pframes_t timestamp) const;
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int64_t parse_mtc (uint8_t const * const buf, pframes_t timestamp) const;
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samplecnt_t _sample_rate;
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uint64_t _monotonic_cnt;
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uint64_t _last_signal_tme;
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uint64_t _cnt_total;
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uint64_t _dly_total;
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uint32_t _min_delay;
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uint32_t _max_delay;
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double _avg_delay;
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double _var_m;
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double _var_s;
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};
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}
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#endif /* __libardour_mididm_h__ */
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