libs/ardour/ardour/source.h

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifndef __ardour_source_h__
  21 #define __ardour_source_h__
  22
  23 #include <string>
  24 #include <set>
  25
  26 #include <glib.h>
  27
  28 #include <boost/utility.hpp>
  29 #include "pbd/statefuldestructible.h"
  30
  31 #include "ardour/ardour.h"
  32 #include "ardour/session_object.h"
  33 #include "ardour/data_type.h"
  34
  35 namespace ARDOUR {
  36
  37 class Session;
  38
  39 class Source : public SessionObject
  40 {
  41   public:
  42         enum Flag {
  43                 Writable = 0x1,
  44                 CanRename = 0x2,
  45                 Broadcast = 0x4,
  46                 Removable = 0x8,
  47                 RemovableIfEmpty = 0x10,
  48                 RemoveAtDestroy = 0x20,
  49                 NoPeakFile = 0x40,
  50                 Destructive = 0x80
  51         };
  52
  53         Source (Session&, DataType type, const std::string& name, Flag flags=Flag(0));
  54         Source (Session&, const XMLNode&);
  55
  56         virtual ~Source ();
  57
  58         DataType type() { return _type; }
  59
  60         time_t timestamp() const { return _timestamp; }
  61         void stamp (time_t when) { _timestamp = when; }
  62
  63         virtual bool       empty () const = 0;
  64         virtual framecnt_t length (framepos_t pos) const = 0;
  65         virtual void       update_length (framepos_t pos, framecnt_t cnt) = 0;
  66
  67         virtual framepos_t natural_position() const { return 0; }
  68
  69         void mark_for_remove();
  70
  71         virtual void mark_streaming_write_started () {}
  72         virtual void mark_streaming_write_completed () = 0;
  73
  74         virtual void session_saved() {}
  75
  76         XMLNode& get_state ();
  77         int set_state (const XMLNode&, int version);
  78
  79         bool         destructive() const       { return (_flags & Destructive); }
  80         bool         writable () const;
  81         virtual bool set_destructive (bool /*yn*/) { return false; }
  82         virtual bool length_mutable() const    { return false; }
  83
  84         static PBD::Signal1<void,Source*>             SourceCreated;
  85
  86         bool has_been_analysed() const;
  87         virtual bool can_be_analysed() const { return false; }
  88         virtual void set_been_analysed (bool yn);
  89         virtual bool check_for_analysis_data_on_disk();
  90
  91         PBD::Signal0<void> AnalysisChanged;
  92
  93         AnalysisFeatureList transients;
  94         std::string get_transients_path() const;
  95         int load_transients (const std::string&);
  96
  97         framepos_t    timeline_position() const { return _timeline_position; }
  98         virtual void set_timeline_position (framepos_t pos);
  99
 100         void set_allow_remove_if_empty (bool yn);
 101
 102         Glib::Mutex& mutex()       { return _lock; }
 103         Flag         flags() const { return _flags; }
 104
 105         virtual void inc_use_count ();
 106         virtual void dec_use_count ();
 107         int  use_count() const { return g_atomic_int_get (&_use_count); }
 108         bool used() const { return use_count() > 0; }
 109
 110   protected:
 111         DataType            _type;
 112         Flag                _flags;
 113         time_t              _timestamp;
 114         framepos_t           _timeline_position;
 115         bool                _analysed;
 116         mutable Glib::Mutex _lock;
 117         mutable Glib::Mutex _analysis_lock;
 118         Glib::Mutex         _playlist_lock;
 119         gint                _use_count; /* atomic */
 120
 121   private:
 122         void fix_writable_flags ();
 123 };
 124
 125 }
 126
 127 #endif /* __ardour_source_h__ */