105 lines
2.3 KiB
C++
105 lines
2.3 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 __libbackend_alsa_midi_h__
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#define __libbackend_alsa_midi_h__
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#include <stdint.h>
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#include <poll.h>
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#include <pthread.h>
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#include "pbd/ringbuffer.h"
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#include "ardour/types.h"
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/* max bytes per individual midi-event
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* events larger than this are ignored */
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#define MaxAlsaMidiEventSize (256)
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namespace ARDOUR {
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class AlsaMidiIO {
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public:
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AlsaMidiIO ();
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virtual ~AlsaMidiIO ();
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int state (void) const { return _state; }
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int start ();
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int stop ();
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void setup_timing (const size_t samples_per_period, const float samplerate);
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void sync_time(uint64_t);
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virtual void* main_process_thread () = 0;
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const std::string & name () const { return _name; }
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protected:
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pthread_t _main_thread;
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pthread_mutex_t _notify_mutex;
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pthread_cond_t _notify_ready;
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int _state;
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bool _running;
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int _npfds;
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struct pollfd *_pfds;
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double _sample_length_us;
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double _period_length_us;
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size_t _samples_per_period;
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uint64_t _clock_monotonic;
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struct MidiEventHeader {
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uint64_t time;
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size_t size;
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MidiEventHeader(const uint64_t t, const size_t s)
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: time(t)
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, size(s) {}
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};
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PBD::RingBuffer<uint8_t>* _rb;
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std::string _name;
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virtual void init (const char *device_name, const bool input) = 0;
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};
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class AlsaMidiOut : virtual public AlsaMidiIO
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{
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public:
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AlsaMidiOut ();
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int send_event (const pframes_t, const uint8_t *, const size_t);
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};
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class AlsaMidiIn : virtual public AlsaMidiIO
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{
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public:
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AlsaMidiIn ();
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size_t recv_event (pframes_t &, uint8_t *, size_t &);
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protected:
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int queue_event (const uint64_t, const uint8_t *, const size_t);
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};
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} // namespace
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#endif
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