lots of details relating to MIDI file management; try to ignore ALSA sequencer MIDI...

[ardour.git] / libs / ardour / ardour / source.h

diff --git a/libs/ardour/ardour/source.h b/libs/ardour/ardour/source.h
index 1ffca509fd972ca52b060d3fa3760c52560ac04f..6f750e6fd00573b1523ce880c35623cbc5f7d576 100644 (file)
--- a/libs/ardour/ardour/source.h
+++ b/libs/ardour/ardour/source.h
@@ -23,21 +23,20 @@
 #include <string>
 #include <set>
 
+#include <glib.h>
+
 #include <boost/utility.hpp>
-#include <sigc++/signal.h>
 #include "pbd/statefuldestructible.h"
 
 #include "ardour/ardour.h"
 #include "ardour/session_object.h"
 #include "ardour/data_type.h"
-#include "ardour/readable.h"
 
 namespace ARDOUR {
 
 class Session;
-class Playlist;
 
-class Source : public SessionObject, public boost::noncopyable
+class Source : public SessionObject
 {
   public:
        enum Flag {
@@ -61,12 +60,13 @@ class Source : public SessionObject, public boost::noncopyable
        time_t timestamp() const { return _timestamp; }
        void stamp (time_t when) { _timestamp = when; }
 
-       virtual sframes_t length (sframes_t pos) const = 0;
-       virtual void      update_length (sframes_t pos, sframes_t cnt) = 0;
+       virtual bool       empty () const = 0;
+       virtual framecnt_t length (framepos_t pos) const = 0;
+       virtual void       update_length (framepos_t pos, framecnt_t cnt) = 0;
 
        virtual const Glib::ustring& path() const = 0;
 
-       virtual nframes64_t natural_position() const { return 0; }
+       virtual framepos_t natural_position() const { return 0; }
 
        void mark_for_remove();
 
@@ -77,29 +77,21 @@ class Source : public SessionObject, public boost::noncopyable
 
        XMLNode& get_state ();
        int set_state (const XMLNode&, int version);
-       
+
        bool         destructive() const       { return (_flags & Destructive); }
        bool         writable () const         { return (_flags & Writable); }
        virtual bool set_destructive (bool /*yn*/) { return false; }
        virtual bool length_mutable() const    { return false; }
 
-       void use ()    { _in_use++; }
-       void disuse () { if (_in_use) { _in_use--; } }
-
-       void add_playlist (boost::shared_ptr<ARDOUR::Playlist>);
-       void remove_playlist (boost::weak_ptr<ARDOUR::Playlist>);
-
-       uint32_t used() const;
-
-       static sigc::signal<void,Source*>             SourceCreated;
-       sigc::signal<void,boost::shared_ptr<Source> > Switched;
+       static PBD::Signal1<void,Source*>             SourceCreated;
+       PBD::Signal1<void,boost::shared_ptr<Source> > Switched;
 
        bool has_been_analysed() const;
        virtual bool can_be_analysed() const { return false; }
        virtual void set_been_analysed (bool yn);
        virtual bool check_for_analysis_data_on_disk();
 
-       sigc::signal<void> AnalysisChanged;
+       PBD::Signal0<void> AnalysisChanged;
 
        AnalysisFeatureList transients;
        std::string get_transients_path() const;
@@ -113,6 +105,11 @@ class Source : public SessionObject, public boost::noncopyable
        Glib::Mutex& mutex()       { return _lock; }
        Flag         flags() const { return _flags; }
 
+        void inc_use_count () { g_atomic_int_inc (&_use_count); }
+        void dec_use_count ();
+        int  use_count() const { return g_atomic_int_get (&_use_count); }
+        bool used() const { return use_count() > 0; }
+
   protected:
        DataType            _type;
        Flag                _flags;
@@ -122,12 +119,9 @@ class Source : public SessionObject, public boost::noncopyable
        mutable Glib::Mutex _lock;
        mutable Glib::Mutex _analysis_lock;
        Glib::Mutex         _playlist_lock;
-
-       typedef std::map<boost::shared_ptr<ARDOUR::Playlist>, uint32_t > PlaylistMap;
-       PlaylistMap _playlists;
+        gint                _use_count; /* atomic */
 
   private:
-       uint32_t _in_use;
        void fix_writable_flags ();
 };