1 /*****************************************************************************
2 * gestures.c: control vlc with mouse gestures
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
5 * $Id: gestures.c,v 1.7 2004/01/25 16:17:03 anil 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 (10-100)" )
78 #define THRESHOLD_LONGTEXT N_( \
79 "Amount of movement required for a mouse" \
80 " gesture to be recorded." )
82 #define BUTTON_TEXT N_( "Trigger button" )
83 #define BUTTON_LONGTEXT N_( \
84 "You can set the trigger button for mouse gestures here." )
86 static char *button_list[] = { "left", "middle", "right" };
87 static char *button_list_text[] = { N_("Left"), N_("Middle"), N_("Right") };
90 add_integer( "gestures-threshold", 30, NULL, THRESHOLD_TEXT, THRESHOLD_LONGTEXT, VLC_TRUE );
91 add_string( "gestures-button", "right", NULL,
92 BUTTON_TEXT, BUTTON_LONGTEXT, VLC_FALSE );
93 change_string_list( button_list, button_list_text, 0 );
94 set_description( _("Mouse gestures control interface") );
96 set_capability( "interface", 0 );
97 set_callbacks( E_(Open), E_(Close) );
100 /*****************************************************************************
101 * OpenIntf: initialize interface
102 *****************************************************************************/
103 int E_(Open) ( vlc_object_t *p_this )
105 intf_thread_t *p_intf = (intf_thread_t *)p_this;
107 /* Allocate instance and initialize some members */
108 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
109 if( p_intf->p_sys == NULL )
114 p_intf->pf_run = RunIntf;
119 /*****************************************************************************
120 * gesture: return a subpattern within a pattern
121 *****************************************************************************/
122 static int gesture( int i_pattern, int i_num )
124 return ( i_pattern >> ( i_num * 4 ) ) & 0xF;
127 /*****************************************************************************
128 * CloseIntf: destroy dummy interface
129 *****************************************************************************/
130 void E_(Close) ( vlc_object_t *p_this )
132 intf_thread_t *p_intf = (intf_thread_t *)p_this;
134 /* Destroy structure */
135 free( p_intf->p_sys );
139 /*****************************************************************************
141 *****************************************************************************/
142 static void RunIntf( intf_thread_t *p_intf )
144 playlist_t * p_playlist = NULL;
145 p_intf->p_sys->p_vout = NULL;
147 if( InitThread( p_intf ) < 0 )
149 msg_Err( p_intf, "can't initialize intf" );
152 msg_Dbg( p_intf, "intf initialized" );
155 while( !p_intf->b_die )
157 vlc_mutex_lock( &p_intf->change_lock );
162 if( p_intf->p_sys->b_got_gesture )
165 switch( p_intf->p_sys->i_pattern )
168 p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
170 if( p_playlist == NULL )
175 playlist_Prev( p_playlist );
176 vlc_object_release( p_playlist );
179 p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
181 if( p_playlist == NULL )
186 playlist_Next( p_playlist );
187 vlc_object_release( p_playlist );
189 case GESTURE(UP,RIGHT,NONE,NONE):
190 if (p_intf->p_sys->p_vout )
192 ((vout_thread_t *)p_intf->p_sys->p_vout)->i_changes |=
193 VOUT_FULLSCREEN_CHANGE;
196 case GESTURE(DOWN,RIGHT,NONE,NONE):
197 /* FIXME: Should close the vout!"*/
198 p_intf->p_vlc->b_die = VLC_TRUE;
200 case GESTURE(DOWN,LEFT,UP,RIGHT):
201 msg_Dbg(p_intf, "a square!" );
206 p_intf->p_sys->i_num_gestures = 0;
207 p_intf->p_sys->i_pattern = 0;
208 p_intf->p_sys->b_got_gesture = VLC_FALSE;
212 vlc_mutex_unlock( &p_intf->change_lock );
217 if( p_intf->p_sys->p_vout && p_intf->p_sys->p_vout->b_die )
219 var_DelCallback( p_intf->p_sys->p_vout, "mouse-moved",
220 MouseEvent, p_intf );
221 var_DelCallback( p_intf->p_sys->p_vout, "mouse-button-down",
222 MouseEvent, p_intf );
223 vlc_object_release( p_intf->p_sys->p_vout );
224 p_intf->p_sys->p_vout = NULL;
227 if( p_intf->p_sys->p_vout == NULL )
229 p_intf->p_sys->p_vout = vlc_object_find( p_intf,
230 VLC_OBJECT_VOUT, FIND_ANYWHERE );
231 if( p_intf->p_sys->p_vout )
233 var_AddCallback( p_intf->p_sys->p_vout, "mouse-moved",
234 MouseEvent, p_intf );
235 var_AddCallback( p_intf->p_sys->p_vout, "mouse-button-down",
236 MouseEvent, p_intf );
241 msleep( INTF_IDLE_SLEEP );
244 if( p_intf->p_sys->p_vout )
246 var_DelCallback( p_intf->p_sys->p_vout, "mouse-moved",
247 MouseEvent, p_intf );
248 var_DelCallback( p_intf->p_sys->p_vout, "mouse-button-down",
249 MouseEvent, p_intf );
250 vlc_object_release( p_intf->p_sys->p_vout );
254 /*****************************************************************************
256 *****************************************************************************/
257 static int InitThread( intf_thread_t * p_intf )
260 /* we might need some locking here */
263 input_thread_t * p_input;
265 p_input = vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_PARENT );
267 vlc_mutex_lock( &p_intf->change_lock );
269 p_intf->p_sys->p_input = p_input;
270 p_intf->p_sys->b_got_gesture = VLC_FALSE;
271 p_intf->p_sys->b_button_pressed = VLC_FALSE;
272 p_intf->p_sys->i_threshold = config_GetInt( p_intf, "gestures-threshold" );
273 psz_button = config_GetPsz( p_intf, "gestures-button" );
274 if ( !strcmp( psz_button, "left" ) )
276 p_intf->p_sys->i_button_mask = 1;
278 else if ( !strcmp( psz_button, "middle" ) )
280 p_intf->p_sys->i_button_mask = 2;
282 else if ( !strcmp( psz_button, "right" ) )
284 p_intf->p_sys->i_button_mask = 4;
287 p_intf->p_sys->i_pattern = 0;
288 p_intf->p_sys->i_num_gestures = 0;
289 vlc_mutex_unlock( &p_intf->change_lock );
299 /*****************************************************************************
300 * MouseEvent: callback for mouse events
301 *****************************************************************************/
302 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
303 vlc_value_t oldval, vlc_value_t newval, void *p_data )
308 signed int i_horizontal, i_vertical;
309 intf_thread_t *p_intf = (intf_thread_t *)p_data;
311 /* don't process new gestures before the last events are processed */
312 if( p_intf->p_sys->b_got_gesture ) {
316 vlc_mutex_lock( &p_intf->change_lock );
317 if( !strcmp(psz_var, "mouse-moved" ) && p_intf->p_sys->b_button_pressed ) {
318 var_Get( p_intf->p_sys->p_vout, "mouse-x", &val );
319 p_intf->p_sys->i_mouse_x = val.i_int;
320 var_Get( p_intf->p_sys->p_vout, "mouse-y", &val );
321 p_intf->p_sys->i_mouse_y = val.i_int;
322 i_horizontal = p_intf->p_sys->i_mouse_x -
323 p_intf->p_sys->i_last_x;
324 i_horizontal = i_horizontal / p_intf->p_sys->i_threshold;
325 i_vertical = p_intf->p_sys->i_mouse_y
326 - p_intf->p_sys->i_last_y;
327 i_vertical = i_vertical / p_intf->p_sys->i_threshold;
329 if ( i_horizontal < 0 )
331 msg_Dbg( p_intf, "left gesture(%d)", i_horizontal );
334 else if ( i_horizontal > 0 )
336 msg_Dbg( p_intf, "right gesture(%d)", i_horizontal );
339 if ( i_vertical < 0 )
341 msg_Dbg( p_intf, "up gesture(%d)", i_vertical );
344 else if ( i_vertical > 0 )
346 msg_Dbg( p_intf, "down gesture(%d)", i_vertical );
351 p_intf->p_sys->i_last_y = p_intf->p_sys->i_mouse_y;
352 p_intf->p_sys->i_last_x = p_intf->p_sys->i_mouse_x;
353 if( gesture(p_intf->p_sys->i_pattern, p_intf->p_sys->i_num_gestures - 1 ) != pattern )
355 p_intf->p_sys->i_pattern |= pattern << ( p_intf->p_sys->i_num_gestures * 4 );
356 p_intf->p_sys->i_num_gestures++;
361 if( !strcmp( psz_var, "mouse-button-down" ) && newval.i_int & p_intf->p_sys->i_button_mask
362 && !p_intf->p_sys->b_button_pressed )
364 p_intf->p_sys->b_button_pressed = VLC_TRUE;
365 var_Get( p_intf->p_sys->p_vout, "mouse-x", &val );
366 p_intf->p_sys->i_last_x = val.i_int;
367 var_Get( p_intf->p_sys->p_vout, "mouse-y", &val );
368 p_intf->p_sys->i_last_y = val.i_int;
370 if( !strcmp( psz_var, "mouse-button-down" ) && !( newval.i_int & p_intf->p_sys->i_button_mask )
371 && p_intf->p_sys->b_button_pressed )
373 p_intf->p_sys->b_button_pressed = VLC_FALSE;
374 p_intf->p_sys->b_got_gesture = VLC_TRUE;
377 vlc_mutex_unlock( &p_intf->change_lock );