1 /*****************************************************************************
2 * geatures.c: control vlc with mouse gestures
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: gestures.c,v 1.2 2003/02/20 01:52:46 sigmunau Exp $
7 * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
35 #include "stream_control.h"
36 #include "input_ext-intf.h"
38 /*****************************************************************************
39 * intf_sys_t: description and status of interface
40 *****************************************************************************/
43 vlc_object_t * p_vout;
44 input_thread_t * p_input;
45 vlc_bool_t b_got_gesture;
46 vlc_bool_t b_button_pressed;
47 int i_mouse_x, i_mouse_y;
48 int i_last_x, i_last_y;
49 unsigned int i_pattern;
55 /*****************************************************************************
57 *****************************************************************************/
63 #define GESTURE( a, b, c, d ) (a | ( b << 4 ) | ( c << 8 ) | ( d << 12 ))
65 int E_(Open) ( vlc_object_t * );
66 void E_(Close) ( vlc_object_t * );
67 static int InitThread ( intf_thread_t *p_intf );
68 static int MouseEvent ( vlc_object_t *, char const *,
69 vlc_value_t, vlc_value_t, void * );
71 /* Exported functions */
72 static void RunIntf ( intf_thread_t *p_intf );
74 /*****************************************************************************
76 *****************************************************************************/
77 #define THRESHOLD_TEXT N_( "Motion threshold" )
78 #define THRESHOLD_LONGTEXT N_( \
79 "the amount of movement required for a mouse" \
80 " gesture to be recorded" )
82 #define BUTTON_TEXT N_( "Mouse button" )
83 #define BUTTON_LONGTEXT N_( \
84 "the mouse button to be held down during mouse gestures" )
86 static char *button_list[] = { "left", "middle", "right", NULL };
89 add_category_hint( N_( "Gestures" ), NULL, VLC_FALSE );
90 add_integer( "gestures-threshold", 30, NULL, THRESHOLD_TEXT, THRESHOLD_LONGTEXT, VLC_TRUE );
91 add_string_from_list( "gestures-button", "right", button_list, NULL,
92 BUTTON_TEXT, BUTTON_LONGTEXT, VLC_FALSE );
93 set_description( _("mouse gestures control module") );
95 set_capability( "interface", 0 );
96 set_callbacks( E_(Open), E_(Close) );
99 /*****************************************************************************
100 * OpenIntf: initialize interface
101 *****************************************************************************/
102 int E_(Open) ( vlc_object_t *p_this )
104 intf_thread_t *p_intf = (intf_thread_t *)p_this;
106 /* Allocate instance and initialize some members */
107 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
108 if( p_intf->p_sys == NULL )
113 p_intf->pf_run = RunIntf;
118 /*****************************************************************************
119 * gesture: return a subpattern within a pattern
120 *****************************************************************************/
121 static int gesture( int i_pattern, int i_num )
123 return ( i_pattern >> ( i_num * 4 ) ) & 0xF;
126 /*****************************************************************************
127 * CloseIntf: destroy dummy interface
128 *****************************************************************************/
129 void E_(Close) ( vlc_object_t *p_this )
131 intf_thread_t *p_intf = (intf_thread_t *)p_this;
133 /* Destroy structure */
134 free( p_intf->p_sys );
138 /*****************************************************************************
140 *****************************************************************************/
141 static void RunIntf( intf_thread_t *p_intf )
143 playlist_t * p_playlist = NULL;
144 p_intf->p_sys->p_vout = NULL;
146 if( InitThread( p_intf ) < 0 )
148 msg_Err( p_intf, "can't initialize intf" );
151 msg_Dbg( p_intf, "intf initialized" );
154 while( !p_intf->b_die )
156 vlc_mutex_lock( &p_intf->change_lock );
161 if( p_intf->p_sys->b_got_gesture )
164 switch( p_intf->p_sys->i_pattern )
167 p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
169 if( p_playlist == NULL )
174 playlist_Prev( p_playlist );
175 vlc_object_release( p_playlist );
178 p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
180 if( p_playlist == NULL )
185 playlist_Next( p_playlist );
186 vlc_object_release( p_playlist );
190 if (p_intf->p_sys->p_vout
191 && ((vout_thread_t *)p_intf->p_sys->p_vout)->b_fullscreen )
193 ((vout_thread_t *)p_intf->p_sys->p_vout)->i_changes |= VOUT_FULLSCREEN_CHANGE;
196 case GESTURE(DOWN,LEFT,UP,RIGHT):
197 msg_Dbg(p_intf, "A square!" );
202 p_intf->p_sys->i_num_gestures = 0;
203 p_intf->p_sys->i_pattern = 0;
204 p_intf->p_sys->b_got_gesture = VLC_FALSE;
208 vlc_mutex_unlock( &p_intf->change_lock );
213 if( p_intf->p_sys->p_vout && p_intf->p_sys->p_vout->b_die )
215 var_DelCallback( p_intf->p_sys->p_vout, "mouse-moved",
216 MouseEvent, p_intf );
217 var_DelCallback( p_intf->p_sys->p_vout, "mouse-button-down",
218 MouseEvent, p_intf );
219 vlc_object_release( p_intf->p_sys->p_vout );
220 p_intf->p_sys->p_vout = NULL;
223 if( p_intf->p_sys->p_vout == NULL )
225 p_intf->p_sys->p_vout = vlc_object_find( p_intf,
226 VLC_OBJECT_VOUT, FIND_ANYWHERE );
227 if( p_intf->p_sys->p_vout )
229 var_AddCallback( p_intf->p_sys->p_vout, "mouse-moved",
230 MouseEvent, p_intf );
231 var_AddCallback( p_intf->p_sys->p_vout, "mouse-button-down",
232 MouseEvent, p_intf );
237 msleep( INTF_IDLE_SLEEP );
240 if( p_intf->p_sys->p_vout )
242 var_DelCallback( p_intf->p_sys->p_vout, "mouse-moved",
243 MouseEvent, p_intf );
244 var_DelCallback( p_intf->p_sys->p_vout, "mouse-button-down",
245 MouseEvent, p_intf );
246 vlc_object_release( p_intf->p_sys->p_vout );
250 /*****************************************************************************
252 *****************************************************************************/
253 static int InitThread( intf_thread_t * p_intf )
256 /* we might need some locking here */
259 input_thread_t * p_input;
261 p_input = vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_PARENT );
263 vlc_mutex_lock( &p_intf->change_lock );
265 p_intf->p_sys->p_input = p_input;
266 p_intf->p_sys->b_got_gesture = VLC_FALSE;
267 p_intf->p_sys->b_button_pressed = VLC_FALSE;
268 p_intf->p_sys->i_threshold = config_GetInt( p_intf, "gestures-threshold" );
269 psz_button = config_GetPsz( p_intf, "gestures-button" );
270 if ( !strcmp( psz_button, "left" ) )
272 p_intf->p_sys->i_button_mask = 1;
274 else if ( !strcmp( psz_button, "middle" ) )
276 p_intf->p_sys->i_button_mask = 2;
278 else if ( !strcmp( psz_button, "right" ) )
280 p_intf->p_sys->i_button_mask = 4;
283 p_intf->p_sys->i_pattern = 0;
284 p_intf->p_sys->i_num_gestures = 0;
285 vlc_mutex_unlock( &p_intf->change_lock );
295 /*****************************************************************************
296 * MouseEvent: callback for mouse events
297 *****************************************************************************/
298 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
299 vlc_value_t oldval, vlc_value_t newval, void *p_data )
304 signed int i_horizontal, i_vertical;
305 intf_thread_t *p_intf = (intf_thread_t *)p_data;
307 /* don't process new gestures before the last events are processed */
308 if( p_intf->p_sys->b_got_gesture ) {
312 vlc_mutex_lock( &p_intf->change_lock );
313 if( !strcmp(psz_var, "mouse-moved" ) && p_intf->p_sys->b_button_pressed ) {
314 var_Get( p_intf->p_sys->p_vout, "mouse-x", &val );
315 p_intf->p_sys->i_mouse_x = val.i_int;
316 var_Get( p_intf->p_sys->p_vout, "mouse-y", &val );
317 p_intf->p_sys->i_mouse_y = val.i_int;
318 i_horizontal = p_intf->p_sys->i_mouse_x -
319 p_intf->p_sys->i_last_x;
320 i_horizontal = i_horizontal / p_intf->p_sys->i_threshold;
321 i_vertical = p_intf->p_sys->i_mouse_y
322 - p_intf->p_sys->i_last_y;
323 i_vertical = i_vertical / p_intf->p_sys->i_threshold;
325 if ( i_horizontal < 0 )
327 msg_Dbg( p_intf, "left gesture(%d)", i_horizontal );
330 else if ( i_horizontal > 0 )
332 msg_Dbg( p_intf, "right gesture(%d)", i_horizontal );
335 if ( i_vertical < 0 )
337 msg_Dbg( p_intf, "up gesture(%d)", i_vertical );
340 else if ( i_vertical > 0 )
342 msg_Dbg( p_intf, "down gesture(%d)", i_vertical );
347 p_intf->p_sys->i_last_y = p_intf->p_sys->i_mouse_y;
348 p_intf->p_sys->i_last_x = p_intf->p_sys->i_mouse_x;
349 if( gesture(p_intf->p_sys->i_pattern, p_intf->p_sys->i_num_gestures - 1 ) != pattern )
351 p_intf->p_sys->i_pattern |= pattern << ( p_intf->p_sys->i_num_gestures * 4 );
352 p_intf->p_sys->i_num_gestures++;
357 if( !strcmp( psz_var, "mouse-button-down" ) && newval.i_int & p_intf->p_sys->i_button_mask
358 && !p_intf->p_sys->b_button_pressed )
360 p_intf->p_sys->b_button_pressed = VLC_TRUE;
361 var_Get( p_intf->p_sys->p_vout, "mouse-x", &val );
362 p_intf->p_sys->i_last_x = val.i_int;
363 var_Get( p_intf->p_sys->p_vout, "mouse-y", &val );
364 p_intf->p_sys->i_last_y = val.i_int;
366 if( !strcmp( psz_var, "mouse-button-down" ) && !( newval.i_int & p_intf->p_sys->i_button_mask )
367 && p_intf->p_sys->b_button_pressed )
369 p_intf->p_sys->b_button_pressed = VLC_FALSE;
370 p_intf->p_sys->b_got_gesture = VLC_TRUE;
373 vlc_mutex_unlock( &p_intf->change_lock );