2 Copyright (C) 2000-2001 Paul Davis
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.
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.
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.
21 #ifndef __ardour_region_h__
22 #define __ardour_region_h__
26 #include <ardour/ardour.h>
27 #include <ardour/logcurve.h>
28 #include <ardour/state_manager.h>
37 enum RegionEditState {
38 EditChangesNothing = 0,
43 struct RegionState : public StateManager::State {
45 RegionState (std::string why) : StateManager::State (why) {}
47 jack_nframes_t _start;
48 jack_nframes_t _length;
49 jack_nframes_t _position;
51 jack_nframes_t _sync_position;
54 mutable RegionEditState _first_edit;
57 class Region : public Stateful, public StateManager
65 DefaultFadeOut = 0x10,
76 RightOfSplit = 0x8000,
78 DoNotSaveState = 0x20000,
80 range_guarantoor = USHRT_MAX
83 static const Flag DefaultFlags = Flag (Opaque|DefaultFadeIn|DefaultFadeOut|FadeIn|FadeOut);
85 static Change FadeChanged;
86 static Change SyncOffsetChanged;
87 static Change MuteChanged;
88 static Change OpacityChanged;
89 static Change LockChanged;
90 static Change LayerChanged;
91 static Change HiddenChanged;
93 Region (jack_nframes_t start, jack_nframes_t length,
94 const string& name, layer_t = 0, Flag flags = DefaultFlags);
95 Region (const Region&, jack_nframes_t start, jack_nframes_t length, const string& name, layer_t = 0, Flag flags = DefaultFlags);
96 Region (const Region&);
97 Region (const XMLNode&);
100 ARDOUR::id_t id() const { return _id; }
102 /* Note: changing the name of a Region does not constitute an edit */
104 string name() const { return _name; }
105 void set_name (string str);
107 jack_nframes_t position () const { return _position; }
108 jack_nframes_t start () const { return _start; }
109 jack_nframes_t length() const { return _length; }
110 layer_t layer () const { return _layer; }
111 jack_nframes_t sync_offset(int& dir) const;
112 jack_nframes_t sync_position() const;
114 jack_nframes_t adjust_to_sync (jack_nframes_t);
116 /* first_frame() is an alias; last_frame() just hides some math */
118 jack_nframes_t first_frame() const { return _position; }
119 jack_nframes_t last_frame() const { return _position + _length - 1; }
121 bool hidden() const { return _flags & Hidden; }
122 bool muted() const { return _flags & Muted; }
123 bool opaque () const { return _flags & Opaque; }
124 bool envelope_active () const { return _flags & EnvelopeActive; }
125 bool locked() const { return _flags & Locked; }
126 bool automatic() const { return _flags & Automatic; }
127 bool whole_file() const { return _flags & WholeFile ; }
128 Flag flags() const { return _flags; }
130 virtual bool should_save_state () const { return !(_flags & DoNotSaveState); };
133 void thaw (const string& why);
135 bool covers (jack_nframes_t frame) const {
136 return _position <= frame && frame < _position + _length;
139 OverlapType coverage (jack_nframes_t start, jack_nframes_t end) const {
140 return ARDOUR::coverage (_position, _position + _length - 1, start, end);
143 virtual jack_nframes_t read_at (Sample *buf, Sample *mixdown_buffer,
144 float *gain_buffer, char * workbuf, jack_nframes_t position, jack_nframes_t cnt,
146 jack_nframes_t read_frames = 0,
147 jack_nframes_t skip_frames = 0) const = 0;
149 /* EDITING OPERATIONS */
151 void set_length (jack_nframes_t, void *src);
152 void set_start (jack_nframes_t, void *src);
153 void set_position (jack_nframes_t, void *src);
154 void set_position_on_top (jack_nframes_t, void *src);
155 void special_set_position (jack_nframes_t);
156 void nudge_position (long, void *src);
158 void move_to_natural_position (void *src);
160 void trim_start (jack_nframes_t new_position, void *src);
161 void trim_front (jack_nframes_t new_position, void *src);
162 void trim_end (jack_nframes_t new_position, void *src);
163 void trim_to (jack_nframes_t position, jack_nframes_t length, void *src);
165 void set_layer (layer_t l); /* ONLY Playlist can call this */
168 void raise_to_top ();
169 void lower_to_bottom ();
171 void set_sync_position (jack_nframes_t n);
172 void clear_sync_position ();
173 void set_hidden (bool yn);
174 void set_muted (bool yn);
175 void set_opaque (bool yn);
176 void set_envelope_active (bool yn);
177 void set_locked (bool yn);
179 virtual uint32_t read_data_count() const { return _read_data_count; }
181 ARDOUR::Playlist* playlist() const { return _playlist; }
183 virtual UndoAction get_memento() const = 0;
185 void set_playlist (ARDOUR::Playlist*);
187 virtual void lock_sources () {}
188 virtual void unlock_sources () {}
192 virtual XMLNode& state (bool);
193 XMLNode& get_state ();
194 int set_state (const XMLNode&);
196 sigc::signal<void,Region*> GoingAway;
198 /* This is emitted only when a new id is assigned. Therefore,
199 in a pure Region copy, it will not be emitted.
201 It must be emitted by derived classes, not Region
202 itself, to permit dynamic_cast<> to be used to
203 infer the type of Region.
206 static sigc::signal<void,Region*> CheckNewRegion;
208 virtual Region* get_parent() = 0;
210 uint64_t last_layer_op() const { return _last_layer_op; }
211 void set_last_layer_op (uint64_t when);
215 jack_nframes_t _start;
216 jack_nframes_t _length;
217 jack_nframes_t _position;
219 jack_nframes_t _sync_position;
222 mutable RegionEditState _first_edit;
226 ARDOUR::Playlist* _playlist;
227 mutable uint32_t _read_data_count; // modified in read()
228 Change pending_changed;
229 uint64_t _last_layer_op; // timestamp
231 XMLNode& get_short_state (); /* used only by Session */
233 /* state management */
235 void send_change (Change);
237 /* derived classes need these during their own state management calls */
239 void store_state (RegionState&) const;
240 Change restore_and_return_flags (RegionState&);
242 void trim_to_internal (jack_nframes_t position, jack_nframes_t length, void *src);
244 bool copied() const { return _flags & Copied; }
245 void maybe_uncopy ();
248 virtual bool verify_start (jack_nframes_t) = 0;
249 virtual bool verify_start_and_length (jack_nframes_t, jack_nframes_t) = 0;
250 virtual bool verify_start_mutable (jack_nframes_t&_start) = 0;
251 virtual bool verify_length (jack_nframes_t) = 0;
252 virtual void recompute_at_start () = 0;
253 virtual void recompute_at_end () = 0;
256 } /* namespace ARDOUR */
258 #endif /* __ardour_region_h__ */