midi_scene_changer.h

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/*
 * Copyright (C) 2014-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2014 David Robillard <d@drobilla.net>
 *
 * 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 <glibmm/threads.h>
 
#include "ardour/midi_port.h"
#include "ardour/scene_changer.h"
 
namespace ARDOUR
{
 
class MIDISceneChange;
 
class MIDISceneChanger : public SceneChanger
{
    public:
        MIDISceneChanger (Session&);
        ~MIDISceneChanger ();
 
        void run (samplepos_t start, samplepos_t end);
        void set_input_port (std::shared_ptr<MidiPort>);
        void set_output_port (std::shared_ptr<MidiPort>);
 
        uint8_t bank_at (samplepos_t, uint8_t channel);
        uint8_t program_at (samplepos_t, uint8_t channel);
 
        void set_recording (bool);
        void locate (samplepos_t);
 
        PBD::Signal<void()> MIDIInputActivity;
 
        PBD::Signal<void()> MIDIOutputActivity;
 
    private:
        typedef std::multimap<samplepos_t,std::shared_ptr<MIDISceneChange> > Scenes;
 
        std::shared_ptr<MidiPort> input_port;
        std::shared_ptr<MidiPort> output_port;
        Glib::Threads::RWLock scene_lock;
        Scenes scenes;
        bool _recording;
        bool have_seen_bank_changes;
        samplepos_t last_program_message_time;
        unsigned short current_bank;
        int last_delivered_program;
        int last_delivered_bank;
 
        void gather (const Locations::LocationList&);
        bool recording () const;
        void jump_to (int bank, int program);
        void rt_deliver (MidiBuffer&, samplepos_t, std::shared_ptr<MIDISceneChange>);
        void non_rt_deliver (std::shared_ptr<MIDISceneChange>);
 
        void bank_change_input (MIDI::Parser&, unsigned short, int channel);
        void program_change_input (MIDI::Parser&, MIDI::byte, int channel);
        void locations_changed ();
 
        PBD::ScopedConnectionList incoming_connections;
};
 
} // namespace