midi_model.h

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/*
 * Copyright (C) 2007-2016 David Robillard <d@drobilla.net>
 * Copyright (C) 2008-2012 Hans Baier <hansfbaier@googlemail.com>
 * Copyright (C) 2008-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2009-2011 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2015 André Nusser <andre.nusser@googlemail.com>
 * Copyright (C) 2016 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.
 */
 
#ifndef __ardour_midi_model_h__
#define __ardour_midi_model_h__
 
#include <deque>
#include <map>
#include <queue>
#include <utility>
 
#include <glibmm/threads.h>
 
#include "pbd/command.h"
 
#include "ardour/libardour_visibility.h"
#include "ardour/automation_list.h"
#include "ardour/automatable_sequence.h"
#include "ardour/source.h"
#include "ardour/types.h"
#include "ardour/types.h"
#include "ardour/variant.h"
 
#include "evoral/Note.h"
#include "evoral/Sequence.h"
 
namespace ARDOUR {
 
class Session;
class MidiSource;
 
class LIBARDOUR_API MidiModel : public AutomatableSequence<Temporal::Beats> {
public:
        typedef Temporal::Beats TimeType;
 
        MidiModel (MidiSource&);
 
        class LIBARDOUR_API DiffCommand : public PBD::Command {
        public:
 
                DiffCommand (std::shared_ptr<MidiModel> m, const std::string& name);
 
                const std::string& name () const { return _name; }
 
                virtual void operator() () = 0;
                virtual void undo () = 0;
 
                virtual int set_state (const XMLNode&, int version) = 0;
                virtual XMLNode & get_state () const = 0;
 
                std::shared_ptr<MidiModel> model() const { return _model; }
 
        protected:
                std::shared_ptr<MidiModel> _model;
                const std::string            _name;
 
        };
 
        class LIBARDOUR_API NoteDiffCommand : public DiffCommand {
        public:
 
                NoteDiffCommand (std::shared_ptr<MidiModel> m, const std::string& name) : DiffCommand (m, name) {}
                NoteDiffCommand (std::shared_ptr<MidiModel> m, const XMLNode& node);
 
                enum Property {
                        NoteNumber,
                        Velocity,
                        StartTime,
                        Length,
                        Channel
                };
 
                void operator() ();
                void undo ();
 
                int set_state (const XMLNode&, int version);
                XMLNode & get_state () const;
 
                void add (const NotePtr note);
                void remove (const NotePtr note);
                void side_effect_remove (const NotePtr note);
 
                void change (const NotePtr note, Property prop, uint8_t new_value) {
                        change(note, prop, Variant(new_value));
                }
 
                void change (const NotePtr note, Property prop, TimeType new_time) {
                        change(note, prop, Variant(new_time));
                }
 
                void change (const NotePtr note, Property prop, const Variant& new_value);
 
                bool adds_or_removes() const {
                        return !_added_notes.empty() || !_removed_notes.empty();
                }
 
                NoteDiffCommand& operator+= (const NoteDiffCommand& other);
 
                static Variant get_value (const NotePtr note, Property prop);
 
                static Variant::Type value_type (Property prop);
 
                struct NoteChange {
                        NoteDiffCommand::Property property;
                        NotePtr note;
                        uint32_t note_id;
                        Variant old_value;
                        Variant new_value;
                };
 
                typedef std::list<NoteChange>                                    ChangeList;
                typedef std::list< std::shared_ptr< Evoral::Note<TimeType> > > NoteList;
 
                const ChangeList& changes()       const { return _changes; }
                const NoteList&   added_notes()   const { return _added_notes; }
                const NoteList&   removed_notes() const { return _removed_notes; }
 
        private:
                ChangeList _changes;
                NoteList   _added_notes;
                NoteList   _removed_notes;
 
                std::set<NotePtr> side_effect_removals;
 
                XMLNode &marshal_change(const NoteChange&) const;
                NoteChange unmarshal_change(XMLNode *xml_note);
 
                XMLNode &marshal_note(const NotePtr note) const;
                NotePtr unmarshal_note(XMLNode *xml_note);
        };
 
        /* Currently this class only supports changes of sys-ex time, but could be expanded */
        class LIBARDOUR_API SysExDiffCommand : public DiffCommand {
        public:
                SysExDiffCommand (std::shared_ptr<MidiModel> m, const std::string& name) : DiffCommand (m, name) {}
                SysExDiffCommand (std::shared_ptr<MidiModel> m, const XMLNode& node);
 
                enum Property {
                        Time,
                };
 
                int set_state (const XMLNode&, int version);
                XMLNode & get_state () const;
 
                void remove (SysExPtr sysex);
                void operator() ();
                void undo ();
 
                void change (std::shared_ptr<Evoral::Event<TimeType> >, TimeType);
 
        private:
                struct Change {
                        Change () : sysex_id (0) {}
                        std::shared_ptr<Evoral::Event<TimeType> > sysex;
                        gint sysex_id;
                        SysExDiffCommand::Property property;
                        TimeType old_time;
                        TimeType new_time;
                };
 
                typedef std::list<Change> ChangeList;
                ChangeList _changes;
 
                std::list<SysExPtr> _removed;
 
                XMLNode & marshal_change (const Change &) const;
                Change unmarshal_change (XMLNode *);
        };
 
        class LIBARDOUR_API PatchChangeDiffCommand : public DiffCommand {
        public:
                PatchChangeDiffCommand (std::shared_ptr<MidiModel>, const std::string &);
                PatchChangeDiffCommand (std::shared_ptr<MidiModel>, const XMLNode &);
 
                int set_state (const XMLNode &, int version);
                XMLNode & get_state () const;
 
                void operator() ();
                void undo ();
 
                void add (PatchChangePtr);
                void remove (PatchChangePtr);
                void change_time (PatchChangePtr, TimeType);
                void change_channel (PatchChangePtr, uint8_t);
                void change_program (PatchChangePtr, uint8_t);
                void change_bank (PatchChangePtr, int);
 
                enum Property {
                        Time,
                        Channel,
                        Program,
                        Bank
                };
 
        private:
                struct Change {
                        PatchChangePtr patch;
                        Property       property;
                        gint           patch_id;
                        TimeType       old_time;
                        union {
                                uint8_t    old_channel;
                                int        old_bank;
                                uint8_t    old_program;
                        };
                        TimeType       new_time;
                        union {
                                uint8_t    new_channel;
                                uint8_t    new_program;
                                int        new_bank;
                        };
 
                    Change() : patch_id (-1) {}
                };
 
                typedef std::list<Change> ChangeList;
                ChangeList _changes;
 
                std::list<PatchChangePtr> _added;
                std::list<PatchChangePtr> _removed;
 
                XMLNode & marshal_change (const Change &) const;
                Change unmarshal_change (XMLNode *);
 
                XMLNode & marshal_patch_change (constPatchChangePtr) const;
                PatchChangePtr unmarshal_patch_change (XMLNode *);
        };
 
        void create_mapping_stash (Temporal::Beats const & offset);
        void rebuild_from_mapping_stash (Temporal::Beats const & offset);
 
        MidiModel::NoteDiffCommand* new_note_diff_command (const std::string& name = "midi edit");
        MidiModel::SysExDiffCommand* new_sysex_diff_command (const std::string& name = "midi edit");
 
        MidiModel::PatchChangeDiffCommand* new_patch_change_diff_command (const std::string& name = "midi edit");
 
        void apply_diff_command_as_commit (Session& session, PBD::Command* cmd);
 
        void apply_diff_command_as_commit (Session* session, PBD::Command* cmd) { if (session) { apply_diff_command_as_commit (*session, cmd); } }
 
        void apply_diff_command_as_subcommand (Session& session, PBD::Command* cmd);
 
        void apply_diff_command_only (Session& session, PBD::Command* cmd);
 
        bool sync_to_source (const Source::WriterLock& source_lock);
 
        bool write_to(std::shared_ptr<MidiSource>     source,
                      const Source::WriterLock& source_lock);
 
        bool write_section_to(std::shared_ptr<MidiSource>     source,
                              const Source::WriterLock& source_lock,
                              Temporal::Beats                   begin = Temporal::Beats(),
                              Temporal::Beats                   end   = std::numeric_limits<Temporal::Beats>::max(),
                              bool                              offset_events = false);
 
        // MidiModel doesn't use the normal AutomationList serialisation code
        // since controller data is stored in the .mid
        XMLNode& get_state() const;
        int set_state(const XMLNode&) { return 0; }
 
        PBD::Signal0<void> ContentsChanged;
        PBD::Signal1<void, Temporal::timecnt_t> ContentsShifted;
 
        std::shared_ptr<Evoral::Note<TimeType> > find_note (NotePtr);
        PatchChangePtr find_patch_change (Evoral::event_id_t);
        std::shared_ptr<Evoral::Note<TimeType> > find_note (Evoral::event_id_t);
        std::shared_ptr<Evoral::Event<TimeType> > find_sysex (Evoral::event_id_t);
 
        InsertMergePolicy insert_merge_policy () const;
        void set_insert_merge_policy (InsertMergePolicy);
 
        std::shared_ptr<Evoral::Control> control_factory(const Evoral::Parameter& id);
 
        void insert_silence_at_start (TimeType);
        void transpose (NoteDiffCommand *, const NotePtr, int);
 
  protected:
        int resolve_overlaps_unlocked (const NotePtr, void* arg = 0);
 
  protected:
        friend class NoteDiffCommand;
        friend class SysExDiffCommand;
        friend class PatchChangeDiffCommand;
 
        MidiSource& midi_source() const { return _midi_source; }
 
  private:
        struct WriteLockImpl : public AutomatableSequence<TimeType>::WriteLockImpl {
                WriteLockImpl(Source::WriterLock* slock, Glib::Threads::RWLock& s, Glib::Threads::Mutex& c)
                        : AutomatableSequence<TimeType>::WriteLockImpl(s, c)
                        , source_lock (slock)
                {}
                ~WriteLockImpl() {
                        delete source_lock;
                }
                Source::WriterLock* source_lock;
        };
 
public:
        WriteLock edit_lock();
 
private:
        friend class DeltaCommand;
 
        void source_interpolation_changed (Evoral::Parameter const&, AutomationList::InterpolationStyle);
        void source_automation_state_changed (Evoral::Parameter const&, AutoState);
        void control_list_interpolation_changed (Evoral::Parameter const&, AutomationList::InterpolationStyle);
        void automation_list_automation_state_changed (Evoral::Parameter const&, AutoState);
 
        void control_list_marked_dirty ();
 
        PBD::ScopedConnectionList _midi_source_connections;
 
        MidiSource& _midi_source;
        InsertMergePolicy _insert_merge_policy;
 
        typedef std::map<void*,superclock_t> TempoMappingStash;
        TempoMappingStash tempo_mapping_stash;
 
};
 
} /* namespace ARDOUR */
 
#endif /* __ardour_midi_model_h__ */