playlist.h

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/*
    Copyright (C) 2000 Paul Davis

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __ardour_playlist_h__
#define __ardour_playlist_h__

#include <string>
#include <set>
#include <map>
#include <list>
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <boost/utility.hpp>

#include <sys/stat.h>

#include <glib.h>

#include "pbd/undo.h"
#include "pbd/stateful.h"
#include "pbd/statefuldestructible.h"
#include "pbd/sequence_property.h"
#include "pbd/stacktrace.h"

#include "evoral/types.hpp"

#include "ardour/ardour.h"
#include "ardour/region.h"
#include "ardour/session_object.h"
#include "ardour/data_type.h"

namespace ARDOUR  {

class Session;
class Playlist;
class Crossfade;

namespace Properties {
        /* fake the type, since regions are handled by SequenceProperty which doesn't
           care about such things.
        */
        LIBARDOUR_API extern PBD::PropertyDescriptor<bool> regions;
}

class LIBARDOUR_API RegionListProperty : public PBD::SequenceProperty<std::list<boost::shared_ptr<Region> > >
{
  public:
        RegionListProperty (Playlist&);

        RegionListProperty* clone () const;
        void get_content_as_xml (boost::shared_ptr<Region>, XMLNode &) const;
        boost::shared_ptr<Region> get_content_from_xml (XMLNode const &) const;

  private:
        RegionListProperty* create () const;

        /* copy construction only by ourselves */
        RegionListProperty (RegionListProperty const & p);

        friend class Playlist;
        /* we live and die with our playlist, no lifetime management needed */
        Playlist& _playlist;
};

class LIBARDOUR_API Playlist : public SessionObject , public boost::enable_shared_from_this<Playlist>
{
public:
        static void make_property_quarks ();

        Playlist (Session&, const XMLNode&, DataType type, bool hidden = false);
        Playlist (Session&, std::string name, DataType type, bool hidden = false);
        Playlist (boost::shared_ptr<const Playlist>, std::string name, bool hidden = false);
        Playlist (boost::shared_ptr<const Playlist>, framepos_t start, framecnt_t cnt, std::string name, bool hidden = false);

        virtual ~Playlist ();

        void update (const RegionListProperty::ChangeRecord&);
        void clear_owned_changes ();
        void rdiff (std::vector<Command*>&) const;

        boost::shared_ptr<Region> region_by_id (const PBD::ID&) const;

        uint32_t max_source_level () const;

        void set_region_ownership ();

        virtual void clear (bool with_signals=true);
        virtual void dump () const;

        void use();
        void release();
        bool used () const { return _refcnt != 0; }

        bool set_name (const std::string& str);
        int sort_id() { return _sort_id; }

        const DataType& data_type() const { return _type; }

        bool frozen() const { return _frozen; }
        void set_frozen (bool yn);

        bool hidden() const { return _hidden; }
        bool empty() const;
        uint32_t n_regions() const;
        bool all_regions_empty() const;
        std::pair<framepos_t, framepos_t> get_extent () const;
        std::pair<framepos_t, framepos_t> get_extent_with_endspace() const;
        layer_t top_layer() const;

        EditMode get_edit_mode() const { return _edit_mode; }
        void set_edit_mode (EditMode);

        /* Editing operations */

        void add_region (boost::shared_ptr<Region>, framepos_t position, float times = 1, bool auto_partition = false);
        void remove_region (boost::shared_ptr<Region>);
        void remove_region_by_source (boost::shared_ptr<Source>);
        void get_equivalent_regions (boost::shared_ptr<Region>, std::vector<boost::shared_ptr<Region> >&);
        void get_region_list_equivalent_regions (boost::shared_ptr<Region>, std::vector<boost::shared_ptr<Region> >&);
        void get_source_equivalent_regions (boost::shared_ptr<Region>, std::vector<boost::shared_ptr<Region> >&);
        void replace_region (boost::shared_ptr<Region> old, boost::shared_ptr<Region> newr, framepos_t pos);
        void split_region (boost::shared_ptr<Region>, framepos_t position);
        void split (framepos_t at);
        void shift (framepos_t at, frameoffset_t distance, bool move_intersected, bool ignore_music_glue);
        void partition (framepos_t start, framepos_t end, bool cut = false);
        void duplicate (boost::shared_ptr<Region>, framepos_t position, float times);
        void nudge_after (framepos_t start, framecnt_t distance, bool forwards);
        boost::shared_ptr<Region> combine (const RegionList&);
        void uncombine (boost::shared_ptr<Region>);
        void fade_range (std::list<AudioRange>&);

        void shuffle (boost::shared_ptr<Region>, int dir);
        void ripple (framepos_t at, framecnt_t distance, RegionList *exclude);
        void ripple (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude) {
                 RegionList el;
                 if (exclude)
                         el.push_back (exclude);
                 ripple (at, distance, &el);
        }

        void update_after_tempo_map_change ();

        boost::shared_ptr<Playlist> cut  (std::list<AudioRange>&, bool result_is_hidden = true);
        boost::shared_ptr<Playlist> copy (std::list<AudioRange>&, bool result_is_hidden = true);
        int                         paste (boost::shared_ptr<Playlist>, framepos_t position, float times);

        const RegionListProperty& region_list () const { return regions; }

        boost::shared_ptr<RegionList> regions_at (framepos_t frame);
        uint32_t                   count_regions_at (framepos_t) const;
        boost::shared_ptr<RegionList> regions_touched (framepos_t start, framepos_t end);
        boost::shared_ptr<RegionList> regions_with_start_within (Evoral::Range<framepos_t>);
        boost::shared_ptr<RegionList> regions_with_end_within (Evoral::Range<framepos_t>);
        uint32_t                   region_use_count (boost::shared_ptr<Region>) const;
        boost::shared_ptr<Region>  find_region (const PBD::ID&) const;
        boost::shared_ptr<Region>  top_region_at (framepos_t frame);
        boost::shared_ptr<Region>  top_unmuted_region_at (framepos_t frame);
        boost::shared_ptr<Region>  find_next_region (framepos_t frame, RegionPoint point, int dir);
        framepos_t                 find_next_region_boundary (framepos_t frame, int dir);
        bool                       region_is_shuffle_constrained (boost::shared_ptr<Region>);
        bool                       has_region_at (framepos_t const) const;

        bool uses_source (boost::shared_ptr<const Source> src) const;

        framepos_t find_next_transient (framepos_t position, int dir);

        void foreach_region (boost::function<void (boost::shared_ptr<Region>)>);

        XMLNode& get_state ();
        virtual int set_state (const XMLNode&, int version);
        XMLNode& get_template ();

        PBD::Signal1<void,bool> InUse;
        PBD::Signal0<void>      ContentsChanged;
        PBD::Signal1<void,boost::weak_ptr<Region> > RegionAdded;
        PBD::Signal1<void,boost::weak_ptr<Region> > RegionRemoved;
        PBD::Signal0<void>      NameChanged;
        PBD::Signal0<void>      LayeringChanged;

        PBD::Signal2<void,std::list< Evoral::RangeMove<framepos_t> > const &, bool> RangesMoved;

        PBD::Signal1<void,std::list< Evoral::Range<framepos_t> > const &> RegionsExtended;

        static std::string bump_name (std::string old_name, Session&);

        void freeze ();
        void thaw (bool from_undo = false);

        void raise_region (boost::shared_ptr<Region>);
        void lower_region (boost::shared_ptr<Region>);
        void raise_region_to_top (boost::shared_ptr<Region>);
        void lower_region_to_bottom (boost::shared_ptr<Region>);

        const PBD::ID& get_orig_track_id () const { return _orig_track_id; }
        void set_orig_track_id (const PBD::ID& did);

        /* destructive editing */

        virtual bool destroy_region (boost::shared_ptr<Region>) = 0;

        void sync_all_regions_with_regions ();

        /* special case function used by UI selection objects, which have playlists that actually own the regions
           within them.
        */

        void drop_regions ();

        virtual boost::shared_ptr<Crossfade> find_crossfade (const PBD::ID &) const {
                return boost::shared_ptr<Crossfade> ();
        }

        framepos_t find_next_top_layer_position (framepos_t) const;
        uint32_t combine_ops() const { return _combine_ops; }

        void set_layer (boost::shared_ptr<Region>, double);

        void set_capture_insertion_in_progress (bool yn);
        
  protected:
        friend class Session;

  protected:
    class RegionReadLock : public Glib::Threads::RWLock::ReaderLock {
    public:
        RegionReadLock (Playlist *pl) : Glib::Threads::RWLock::ReaderLock (pl->region_lock) {}
        ~RegionReadLock() {}
    };

    class RegionWriteLock : public Glib::Threads::RWLock::WriterLock {
    public:
            RegionWriteLock (Playlist *pl, bool do_block_notify = true) 
                    : Glib::Threads::RWLock::WriterLock (pl->region_lock)
                    , playlist (pl)
                    , block_notify (do_block_notify) {
                    if (block_notify) {
                            playlist->delay_notifications();
                    }
            }

        ~RegionWriteLock() {
                Glib::Threads::RWLock::WriterLock::release ();
                if (block_notify) {
                        playlist->release_notifications ();
                }
        }
        Playlist *playlist;
        bool block_notify;
    };

        RegionListProperty   regions;  /* the current list of regions in the playlist */
        std::set<boost::shared_ptr<Region> > all_regions; /* all regions ever added to this playlist */
        PBD::ScopedConnectionList region_state_changed_connections;
        DataType        _type;
        int             _sort_id;
        mutable gint    block_notifications;
        mutable gint    ignore_state_changes;
        std::set<boost::shared_ptr<Region> > pending_adds;
        std::set<boost::shared_ptr<Region> > pending_removes;
        RegionList       pending_bounds;
        bool             pending_contents_change;
        bool             pending_layering;

        std::list< Evoral::RangeMove<framepos_t> > pending_range_moves;
        std::list< Evoral::Range<framepos_t> >     pending_region_extensions;
        uint32_t         in_set_state;
        bool             in_undo;
        bool             first_set_state;
        bool            _hidden;
        bool            _splicing;
        bool            _rippling;
        bool            _shuffling;
        bool            _nudging;
        uint32_t        _refcnt;
        EditMode        _edit_mode;
        bool             in_flush;
        bool             in_partition;
        bool            _frozen;
        bool            _capture_insertion_underway;
        uint32_t         subcnt;
        PBD::ID         _orig_track_id;
        uint32_t        _combine_ops;

        void init (bool hide);

        bool holding_state () const {
                return g_atomic_int_get (&block_notifications) != 0 ||
                        g_atomic_int_get (&ignore_state_changes) != 0;
        }

        void delay_notifications ();
        void release_notifications (bool from_undo = false);
        virtual void flush_notifications (bool from_undo = false);
        void clear_pending ();

        void _set_sort_id ();

        boost::shared_ptr<RegionList> regions_touched_locked (framepos_t start, framepos_t end);

        void notify_region_removed (boost::shared_ptr<Region>);
        void notify_region_added (boost::shared_ptr<Region>);
        void notify_layering_changed ();
        void notify_contents_changed ();
        void notify_state_changed (const PBD::PropertyChange&);
        void notify_region_moved (boost::shared_ptr<Region>);
        void notify_region_start_trimmed (boost::shared_ptr<Region>);
        void notify_region_end_trimmed (boost::shared_ptr<Region>);

        void mark_session_dirty();

        void region_changed_proxy (const PBD::PropertyChange&, boost::weak_ptr<Region>);
        virtual bool region_changed (const PBD::PropertyChange&, boost::shared_ptr<Region>);

        void region_bounds_changed (const PBD::PropertyChange&, boost::shared_ptr<Region>);
        void region_deleted (boost::shared_ptr<Region>);

        void sort_regions ();

        void possibly_splice (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude = boost::shared_ptr<Region>());
        void possibly_splice_unlocked(framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude = boost::shared_ptr<Region>());

        void core_splice (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude);
        void splice_locked (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude);
        void splice_unlocked (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude);

        void core_ripple (framepos_t at, framecnt_t distance, RegionList *exclude);
        void ripple_locked (framepos_t at, framecnt_t distance, RegionList *exclude);
        void ripple_unlocked (framepos_t at, framecnt_t distance, RegionList *exclude);


        virtual void remove_dependents (boost::shared_ptr<Region> /*region*/) {}

        virtual XMLNode& state (bool);

        bool add_region_internal (boost::shared_ptr<Region>, framepos_t position);

        int remove_region_internal (boost::shared_ptr<Region>);
        void copy_regions (RegionList&) const;
        void partition_internal (framepos_t start, framepos_t end, bool cutting, RegionList& thawlist);

        std::pair<framepos_t, framepos_t> _get_extent() const;

        boost::shared_ptr<Playlist> cut_copy (boost::shared_ptr<Playlist> (Playlist::*pmf)(framepos_t, framecnt_t, bool),
                                              std::list<AudioRange>& ranges, bool result_is_hidden);
        boost::shared_ptr<Playlist> cut (framepos_t start, framecnt_t cnt, bool result_is_hidden);
        boost::shared_ptr<Playlist> copy (framepos_t start, framecnt_t cnt, bool result_is_hidden);

        void relayer ();

        void begin_undo ();
        void end_undo ();

        void _split_region (boost::shared_ptr<Region>, framepos_t position);

        typedef std::pair<boost::shared_ptr<Region>, boost::shared_ptr<Region> > TwoRegions;

        /* this is called before we create a new compound region */
        virtual void pre_combine (std::vector<boost::shared_ptr<Region> >&) {}
        /* this is called before we create a new compound region */
        virtual void post_combine (std::vector<boost::shared_ptr<Region> >&, boost::shared_ptr<Region>) {}
        /* this is called before we remove a compound region and replace it
           with its constituent regions
        */
        virtual void pre_uncombine (std::vector<boost::shared_ptr<Region> >&, boost::shared_ptr<Region>) {}

  private:
        friend class RegionReadLock;
        friend class RegionWriteLock;
        mutable Glib::Threads::RWLock region_lock;

  private:
        void setup_layering_indices (RegionList const &);
        void coalesce_and_check_crossfades (std::list<Evoral::Range<framepos_t> >);
        boost::shared_ptr<RegionList> find_regions_at (framepos_t);

        framepos_t _end_space;  //this is used when we are pasting a range with extra space at the end
};

} /* namespace ARDOUR */

#endif  /* __ardour_playlist_h__ */