midi_port.h

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/*
 * Copyright (C) 2006-2014 David Robillard <d@drobilla.net>
 * Copyright (C) 2007-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2007-2018 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2015-2019 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#pragma once
 
#include "midi++/parser.h"
 
#include "ardour/port.h"
#include "ardour/midi_buffer.h"
 
namespace ARDOUR {
 
class MidiBuffer;
class MidiEngine;
class ScaleProvider;
 
class LIBARDOUR_API MidiPort : public Port {
  public:
        ~MidiPort();
 
        DataType type () const {
                return DataType::MIDI;
        }
 
        void cycle_start (pframes_t nframes);
        void cycle_end (pframes_t nframes);
        void cycle_split ();
 
        void flush_buffers (pframes_t nframes);
        void transport_stopped ();
        void realtime_locate (bool);
        void reset ();
        void require_resolve ();
 
        bool input_active() const { return _input_active; }
        void set_input_active (bool yn);
 
        Buffer& get_buffer (pframes_t nframes) {
                return get_midi_buffer (nframes);
        }
 
        MidiBuffer& get_midi_buffer (pframes_t nframes);
 
        void set_trace (std::weak_ptr<MIDI::Parser> trace_parser);
        std::shared_ptr<MIDI::Parser> trace_parser() const;
 
        typedef std::function<bool(MidiBuffer&,MidiBuffer&)> MidiFilter;
        void set_inbound_filter (MidiFilter);
        int add_shadow_port (std::string const &, MidiFilter);
        std::shared_ptr<MidiPort> shadow_port() const { return _shadow_port; }
 
        void read_and_parse_entire_midi_buffer_with_no_speed_adjustment (pframes_t nframes, MIDI::Parser& parser, samplepos_t now);
 
        PBD::Signal<void(int)> NoteOn;
        PBD::Signal<void(int)> NoteOff;
 
        void set_scale_provider (ScaleProvider*);
 
        static bool sysex_midi_io_may_be_broken;
 
protected:
        friend class PortManager;
 
        MidiPort (const std::string& name, PortFlags);
 
private:
        MidiBuffer*                 _buffer;
        ScaleProvider*              _scale_provider;
        bool                        _resolve_required;
        bool                        _input_active;
        MidiFilter                  _inbound_midi_filter;
        std::shared_ptr<MidiPort> _shadow_port;
        MidiFilter                  _shadow_midi_filter;
        std::weak_ptr<MIDI::Parser> _trace_parser;
        bool                        _data_fetched_for_cycle;
 
        void resolve_notes (void* buffer, samplepos_t when);
        void pull_input (pframes_t nframes, bool adjust_speed);
        void parse_input (pframes_t nframes, MIDI::Parser& parser);
};
 
} // namespace ARDOUR