1 /*****************************************************************************
2 * gestures.c: control vlc with mouse gestures
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
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 /*****************************************************************************
36 * intf_sys_t: description and status of interface
37 *****************************************************************************/
40 vlc_object_t * p_vout;
41 input_thread_t * p_input;
42 vlc_bool_t b_got_gesture;
43 vlc_bool_t b_button_pressed;
44 int i_mouse_x, i_mouse_y;
45 int i_last_x, i_last_y;
46 unsigned int i_pattern;
52 /*****************************************************************************
54 *****************************************************************************/
60 #define GESTURE( a, b, c, d ) (a | ( b << 4 ) | ( c << 8 ) | ( d << 12 ))
62 int E_(Open) ( vlc_object_t * );
63 void E_(Close) ( vlc_object_t * );
64 static int InitThread ( intf_thread_t *p_intf );
65 static int MouseEvent ( vlc_object_t *, char const *,
66 vlc_value_t, vlc_value_t, void * );
68 /* Exported functions */
69 static void RunIntf ( intf_thread_t *p_intf );
71 /*****************************************************************************
73 *****************************************************************************/
74 #define THRESHOLD_TEXT N_( "Motion threshold (10-100)" )
75 #define THRESHOLD_LONGTEXT N_( \
76 "Amount of movement required for a mouse" \
77 " gesture to be recorded." )
79 #define BUTTON_TEXT N_( "Trigger button" )
80 #define BUTTON_LONGTEXT N_( \
81 "You can set the trigger button for mouse gestures here." )
83 static char *button_list[] = { "left", "middle", "right" };
84 static char *button_list_text[] = { N_("Left"), N_("Middle"), N_("Right") };
87 add_integer( "gestures-threshold", 30, NULL, THRESHOLD_TEXT, THRESHOLD_LONGTEXT, VLC_TRUE );
88 add_string( "gestures-button", "right", NULL,
89 BUTTON_TEXT, BUTTON_LONGTEXT, VLC_FALSE );
90 change_string_list( button_list, button_list_text, 0 );
91 set_description( _("Mouse gestures control interface") );
93 set_capability( "interface", 0 );
94 set_callbacks( E_(Open), E_(Close) );
97 /*****************************************************************************
98 * OpenIntf: initialize interface
99 *****************************************************************************/
100 int E_(Open) ( vlc_object_t *p_this )
102 intf_thread_t *p_intf = (intf_thread_t *)p_this;
104 /* Allocate instance and initialize some members */
105 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
106 if( p_intf->p_sys == NULL )
111 p_intf->pf_run = RunIntf;
116 /*****************************************************************************
117 * gesture: return a subpattern within a pattern
118 *****************************************************************************/
119 static int gesture( int i_pattern, int i_num )
121 return ( i_pattern >> ( i_num * 4 ) ) & 0xF;
124 /*****************************************************************************
125 * CloseIntf: destroy dummy interface
126 *****************************************************************************/
127 void E_(Close) ( vlc_object_t *p_this )
129 intf_thread_t *p_intf = (intf_thread_t *)p_this;
131 /* Destroy structure */
132 free( p_intf->p_sys );
136 /*****************************************************************************
138 *****************************************************************************/
139 static void RunIntf( intf_thread_t *p_intf )
141 playlist_t * p_playlist = NULL;
142 p_intf->p_sys->p_vout = NULL;
144 if( InitThread( p_intf ) < 0 )
146 msg_Err( p_intf, "can't initialize intf" );
149 msg_Dbg( p_intf, "intf initialized" );
152 while( !p_intf->b_die )
154 vlc_mutex_lock( &p_intf->change_lock );
159 if( p_intf->p_sys->b_got_gesture )
162 switch( p_intf->p_sys->i_pattern )
165 p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
167 if( p_playlist == NULL )
172 playlist_Prev( p_playlist );
173 vlc_object_release( p_playlist );
176 p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
178 if( p_playlist == NULL )
183 playlist_Next( p_playlist );
184 vlc_object_release( p_playlist );
186 case GESTURE(UP,RIGHT,NONE,NONE):
187 if (p_intf->p_sys->p_vout )
189 ((vout_thread_t *)p_intf->p_sys->p_vout)->i_changes |=
190 VOUT_FULLSCREEN_CHANGE;
193 case GESTURE(DOWN,RIGHT,NONE,NONE):
194 /* FIXME: Should close the vout!"*/
195 p_intf->p_vlc->b_die = VLC_TRUE;
197 case GESTURE(DOWN,LEFT,UP,RIGHT):
198 msg_Dbg(p_intf, "a square!" );
203 p_intf->p_sys->i_num_gestures = 0;
204 p_intf->p_sys->i_pattern = 0;
205 p_intf->p_sys->b_got_gesture = VLC_FALSE;
209 vlc_mutex_unlock( &p_intf->change_lock );
214 if( p_intf->p_sys->p_vout && p_intf->p_sys->p_vout->b_die )
216 var_DelCallback( p_intf->p_sys->p_vout, "mouse-moved",
217 MouseEvent, p_intf );
218 var_DelCallback( p_intf->p_sys->p_vout, "mouse-button-down",
219 MouseEvent, p_intf );
220 vlc_object_release( p_intf->p_sys->p_vout );
221 p_intf->p_sys->p_vout = NULL;
224 if( p_intf->p_sys->p_vout == NULL )
226 p_intf->p_sys->p_vout = vlc_object_find( p_intf,
227 VLC_OBJECT_VOUT, FIND_ANYWHERE );
228 if( p_intf->p_sys->p_vout )
230 var_AddCallback( p_intf->p_sys->p_vout, "mouse-moved",
231 MouseEvent, p_intf );
232 var_AddCallback( p_intf->p_sys->p_vout, "mouse-button-down",
233 MouseEvent, p_intf );
238 msleep( INTF_IDLE_SLEEP );
241 if( p_intf->p_sys->p_vout )
243 var_DelCallback( p_intf->p_sys->p_vout, "mouse-moved",
244 MouseEvent, p_intf );
245 var_DelCallback( p_intf->p_sys->p_vout, "mouse-button-down",
246 MouseEvent, p_intf );
247 vlc_object_release( p_intf->p_sys->p_vout );
251 /*****************************************************************************
253 *****************************************************************************/
254 static int InitThread( intf_thread_t * p_intf )
257 /* we might need some locking here */
260 input_thread_t * p_input;
262 p_input = vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_PARENT );
264 vlc_mutex_lock( &p_intf->change_lock );
266 p_intf->p_sys->p_input = p_input;
267 p_intf->p_sys->b_got_gesture = VLC_FALSE;
268 p_intf->p_sys->b_button_pressed = VLC_FALSE;
269 p_intf->p_sys->i_threshold = config_GetInt( p_intf, "gestures-threshold" );
270 psz_button = config_GetPsz( p_intf, "gestures-button" );
271 if ( !strcmp( psz_button, "left" ) )
273 p_intf->p_sys->i_button_mask = 1;
275 else if ( !strcmp( psz_button, "middle" ) )
277 p_intf->p_sys->i_button_mask = 2;
279 else if ( !strcmp( psz_button, "right" ) )
281 p_intf->p_sys->i_button_mask = 4;
284 p_intf->p_sys->i_pattern = 0;
285 p_intf->p_sys->i_num_gestures = 0;
286 vlc_mutex_unlock( &p_intf->change_lock );
296 /*****************************************************************************
297 * MouseEvent: callback for mouse events
298 *****************************************************************************/
299 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
300 vlc_value_t oldval, vlc_value_t newval, void *p_data )
305 signed int i_horizontal, i_vertical;
306 intf_thread_t *p_intf = (intf_thread_t *)p_data;
308 /* don't process new gestures before the last events are processed */
309 if( p_intf->p_sys->b_got_gesture ) {
313 vlc_mutex_lock( &p_intf->change_lock );
314 if( !strcmp(psz_var, "mouse-moved" ) && p_intf->p_sys->b_button_pressed ) {
315 var_Get( p_intf->p_sys->p_vout, "mouse-x", &val );
316 p_intf->p_sys->i_mouse_x = val.i_int;
317 var_Get( p_intf->p_sys->p_vout, "mouse-y", &val );
318 p_intf->p_sys->i_mouse_y = val.i_int;
319 i_horizontal = p_intf->p_sys->i_mouse_x -
320 p_intf->p_sys->i_last_x;
321 i_horizontal = i_horizontal / p_intf->p_sys->i_threshold;
322 i_vertical = p_intf->p_sys->i_mouse_y
323 - p_intf->p_sys->i_last_y;
324 i_vertical = i_vertical / p_intf->p_sys->i_threshold;
326 if ( i_horizontal < 0 )
328 msg_Dbg( p_intf, "left gesture(%d)", i_horizontal );
331 else if ( i_horizontal > 0 )
333 msg_Dbg( p_intf, "right gesture(%d)", i_horizontal );
336 if ( i_vertical < 0 )
338 msg_Dbg( p_intf, "up gesture(%d)", i_vertical );
341 else if ( i_vertical > 0 )
343 msg_Dbg( p_intf, "down gesture(%d)", i_vertical );
348 p_intf->p_sys->i_last_y = p_intf->p_sys->i_mouse_y;
349 p_intf->p_sys->i_last_x = p_intf->p_sys->i_mouse_x;
350 if( gesture(p_intf->p_sys->i_pattern, p_intf->p_sys->i_num_gestures - 1 ) != pattern )
352 p_intf->p_sys->i_pattern |= pattern << ( p_intf->p_sys->i_num_gestures * 4 );
353 p_intf->p_sys->i_num_gestures++;
358 if( !strcmp( psz_var, "mouse-button-down" ) && newval.i_int & p_intf->p_sys->i_button_mask
359 && !p_intf->p_sys->b_button_pressed )
361 p_intf->p_sys->b_button_pressed = VLC_TRUE;
362 var_Get( p_intf->p_sys->p_vout, "mouse-x", &val );
363 p_intf->p_sys->i_last_x = val.i_int;
364 var_Get( p_intf->p_sys->p_vout, "mouse-y", &val );
365 p_intf->p_sys->i_last_y = val.i_int;
367 if( !strcmp( psz_var, "mouse-button-down" ) && !( newval.i_int & p_intf->p_sys->i_button_mask )
368 && p_intf->p_sys->b_button_pressed )
370 p_intf->p_sys->b_button_pressed = VLC_FALSE;
371 p_intf->p_sys->b_got_gesture = VLC_TRUE;
374 vlc_mutex_unlock( &p_intf->change_lock );