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douglas_peucker.h
1 /**********************************************************
2 *
3 * mp3splt-gtk -- utility based on mp3splt,
4 * for mp3/ogg splitting without decoding
5 *
6 * Copyright (c) 2005-2013 Alexandru Munteanu - m@ioalex.net
7 *
8 * http://mp3splt.sourceforge.net/
9 *
10 *********************************************************/
11
12 /**********************************************************
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 2
17 * of the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
27 * USA.
28 *
29 *********************************************************/
30
31 #ifndef DOUGLAS_PEUCKER_H
32 #define DOUGLAS_PEUCKER_H
33
34 #include "external_includes.h"
35 #include "ui_types.h"
36
37 typedef struct {
38 gdouble distance;
39 gint index;
40 } distance_and_index;
41
42 typedef struct {
43 GdkPoint point;
44 gint index;
45 } douglas_point;
46
47 GPtrArray *splt_douglas_peucker(GArray *gdk_points, void (*callback)(ui_state *ui),
48 ui_state *ui, gdouble threshold_to_discard_points, ...);
49 void splt_douglas_peucker_free(GPtrArray *douglas_peucker_ptr_array);
50
51 //for unit tests
52 gdouble splt_find_distance(GdkPoint first, GdkPoint second);
53 gdouble splt_find_perpendicular_distance(GdkPoint point,
54 GdkPoint segment_begin_point, GdkPoint segment_end_point);
55 distance_and_index *splt_find_point_with_maximum_distance(GArray *douglas_points,
56 GdkPoint first_point, GdkPoint last_point);
57
58 #endif
59
distance_and_index
Definition: douglas_peucker.h:37
ui_state
Definition: ui_types.h:485
douglas_point
Definition: douglas_peucker.h:42