midi_surface.h

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/*
 * Copyright (C) 2022 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.
 */
 
#define ABSTRACT_UI_EXPORTS
#include "pbd/abstract_ui.h"
 
#include "control_protocol/control_protocol.h"
#include "midi++/types.h"
 
#include "midi_byte_array.h"
 
namespace MIDI {
        class Parser;
        class Port;
}
 
namespace ARDOUR {
        class Bundle;
        class Port;
        class MidiBuffer;
}
 
struct MidiSurfaceRequest : public BaseUI::BaseRequestObject {
  public:
        MidiSurfaceRequest () {}
        ~MidiSurfaceRequest () {}
};
 
class MIDISurface : public ARDOUR::ControlProtocol
                  , public AbstractUI<MidiSurfaceRequest>
{
  public:
        MIDISurface (ARDOUR::Session&, std::string const & name, std::string const & port_name_prefix, bool use_pad_filter);
        ~MIDISurface ();
 
        std::shared_ptr<ARDOUR::Port> input_port();
        std::shared_ptr<ARDOUR::Port> output_port();
 
        // Bundle to represent our input ports
        std::shared_ptr<ARDOUR::Bundle> _input_bundle;
        // Bundle to represent our output ports
        std::shared_ptr<ARDOUR::Bundle> _output_bundle;
 
        ARDOUR::Session & get_session() { return *session; }
 
        /* These two names are used in a port registration handler to try to
           automatically connect the device when it is discovered.
 
           If the value returned by these methods begins with a colon, they
           will be assumed to be regular expressions, and passed (without the
           leading colon) into the constructor of a std::regex using
           std::regex::extended syntax.
 
           Otherwise, they are assumed to be unique string identifiers, and are
           merely searched for in port names with std::string::find().
        */
        virtual std::string input_port_name () const = 0;
        virtual std::string output_port_name () const = 0;
 
        void write (const MidiByteArray&);
        void write (MIDI::byte const *, size_t);
 
        XMLNode& get_state() const;
        int set_state (const XMLNode & node, int version);
 
        std::list<std::shared_ptr<ARDOUR::Bundle> > bundles ();
 
        PBD::Signal<void()> ConnectionChange;
 
        CONTROL_PROTOCOL_THREADS_NEED_TEMPO_MAP_DECL();
 
        virtual bool midi_input_handler (Glib::IOCondition ioc, MIDI::Port* port);
        void midi_connectivity_established (bool);
 
  protected:
        bool with_pad_filter;
        bool _in_use;
        bool _data_required;
        std::string port_name_prefix;
        MIDI::Port* _input_port;
        MIDI::Port* _output_port;
 
        std::shared_ptr<ARDOUR::Port> _async_in;
        std::shared_ptr<ARDOUR::Port> _async_out;
 
        void do_request (MidiSurfaceRequest*);
 
        virtual void connect_to_parser ();
        virtual void connect_to_port_parser (MIDI::Port&);
        virtual void handle_midi_pitchbend_message (MIDI::Parser&, MIDI::pitchbend_t) {}
        virtual void handle_midi_polypressure_message (MIDI::Parser&, MIDI::EventTwoBytes*) {}
        virtual void handle_midi_controller_message (MIDI::Parser&, MIDI::EventTwoBytes*) {}
        virtual void handle_midi_note_on_message (MIDI::Parser&, MIDI::EventTwoBytes*) {}
        virtual void handle_midi_note_off_message (MIDI::Parser&, MIDI::EventTwoBytes*) {}
        virtual void handle_midi_sysex (MIDI::Parser&, MIDI::byte *, size_t) {}
 
 
        virtual void thread_init ();
 
        PBD::ScopedConnectionList session_connections;
 
        virtual void connect_session_signals ();
        virtual void notify_record_state_changed () {}
        virtual void notify_transport_state_changed () {}
        virtual void notify_loop_state_changed () {}
        virtual void notify_parameter_changed (std::string) {}
        virtual void notify_solo_active_changed (bool) {}
 
        virtual void port_registration_handler ();
        virtual bool pad_filter (ARDOUR::MidiBuffer& in, ARDOUR::MidiBuffer& out) const { return false; }
 
        enum ConnectionState {
                InputConnected = 0x1,
                OutputConnected = 0x2
        };
 
        int _connection_state;
 
        PBD::ScopedConnectionList port_connections;
 
        virtual int ports_acquire ();
        virtual void ports_release ();
 
        virtual int begin_using_device ();
        virtual int stop_using_device ();
        virtual int device_acquire () = 0;
        virtual void device_release () = 0;
 
        void drop ();
        void port_setup ();
 
  private:
        bool connection_handler (std::weak_ptr<ARDOUR::Port>, std::string name1, std::weak_ptr<ARDOUR::Port>, std::string name2, bool yn);
};