git.sesse.net Git - vlc/blob - modules/control/gestures.c

   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 $
   6  *
   7  * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
   8  *
   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.
  13  *
  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.
  18  *
  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  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28 #include <string.h>
  29 #include <unistd.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/intf.h>
  33 #include <vlc/vout.h>
  34
  35 #include "stream_control.h"
  36 #include "input_ext-intf.h"
  37
  38 /*****************************************************************************
  39  * intf_sys_t: description and status of interface
  40  *****************************************************************************/
  41 struct intf_sys_t
  42 {
  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;
  50     int                 i_num_gestures;
  51     int                 i_threshold;
  52     int                 i_button_mask;
  53 };
  54
  55 /*****************************************************************************
  56  * Local prototypes.
  57  *****************************************************************************/
  58 #define UP 1
  59 #define DOWN 2
  60 #define LEFT 3
  61 #define RIGHT 4
  62 #define NONE 0
  63 #define GESTURE( a, b, c, d ) (a | ( b << 4 ) | ( c << 8 ) | ( d << 12 ))
  64
  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 * );
  70
  71 /* Exported functions */
  72 static void RunIntf        ( intf_thread_t *p_intf );
  73
  74 /*****************************************************************************
  75  * Module descriptor
  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" )
  81
  82 #define BUTTON_TEXT N_( "Mouse button" )
  83 #define BUTTON_LONGTEXT N_( \
  84     "the mouse button to be held down during mouse gestures" )
  85
  86 static char *button_list[] = { "left", "middle", "right", NULL };
  87
  88 vlc_module_begin();
  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") );
  94
  95     set_capability( "interface", 0 );
  96     set_callbacks( E_(Open), E_(Close) );
  97 vlc_module_end();
  98
  99 /*****************************************************************************
 100  * OpenIntf: initialize interface
 101  *****************************************************************************/
 102 int E_(Open) ( vlc_object_t *p_this )
 103 {
 104     intf_thread_t *p_intf = (intf_thread_t *)p_this;
 105
 106     /* Allocate instance and initialize some members */
 107     p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
 108     if( p_intf->p_sys == NULL )
 109     {
 110         return( 1 );
 111     };
 112
 113     p_intf->pf_run = RunIntf;
 114
 115     return( 0 );
 116 }
 117
 118 /*****************************************************************************
 119  * gesture: return a subpattern within a pattern
 120  *****************************************************************************/
 121 static int gesture( int i_pattern, int i_num )
 122 {
 123     return ( i_pattern >> ( i_num * 4 ) ) & 0xF;
 124 }
 125
 126 /*****************************************************************************
 127  * CloseIntf: destroy dummy interface
 128  *****************************************************************************/
 129 void E_(Close) ( vlc_object_t *p_this )
 130 {
 131     intf_thread_t *p_intf = (intf_thread_t *)p_this;
 132
 133     /* Destroy structure */
 134     free( p_intf->p_sys );
 135 }
 136
 137
 138 /*****************************************************************************
 139  * RunIntf: main loop
 140  *****************************************************************************/
 141 static void RunIntf( intf_thread_t *p_intf )
 142 {
 143     playlist_t * p_playlist = NULL;
 144     p_intf->p_sys->p_vout = NULL;
 145
 146     if( InitThread( p_intf ) < 0 )
 147     {
 148         msg_Err( p_intf, "can't initialize intf" );
 149         return;
 150     }
 151     msg_Dbg( p_intf, "intf initialized" );
 152
 153     /* Main loop */
 154     while( !p_intf->b_die )
 155     {
 156         vlc_mutex_lock( &p_intf->change_lock );
 157
 158         /*
 159          * mouse cursor
 160          */
 161         if( p_intf->p_sys->b_got_gesture )
 162         {
 163             /* Do something */
 164             switch( p_intf->p_sys->i_pattern )
 165             {
 166             case LEFT:
 167                 p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
 168                                               FIND_ANYWHERE );
 169                 if( p_playlist == NULL )
 170                 {
 171                     break;
 172                 }
 173
 174                 playlist_Prev( p_playlist );
 175                 vlc_object_release( p_playlist );
 176                 break;
 177             case RIGHT:
 178                 p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
 179                                               FIND_ANYWHERE );
 180                 if( p_playlist == NULL )
 181                 {
 182                     break;
 183                 }
 184
 185                 playlist_Next( p_playlist );
 186                 vlc_object_release( p_playlist );
 187                 break;
 188
 189             case DOWN:
 190                 if (p_intf->p_sys->p_vout
 191                     && ((vout_thread_t *)p_intf->p_sys->p_vout)->b_fullscreen )
 192                 {
 193                     ((vout_thread_t *)p_intf->p_sys->p_vout)->i_changes |= VOUT_FULLSCREEN_CHANGE;
 194                 }
 195                 break;
 196             case GESTURE(DOWN,LEFT,UP,RIGHT):
 197                 msg_Dbg(p_intf, "A square!" );
 198                 break;
 199             default:
 200                 break;
 201             }
 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;
 205         }
 206
 207
 208         vlc_mutex_unlock( &p_intf->change_lock );
 209
 210         /*
 211          * video output
 212          */
 213         if( p_intf->p_sys->p_vout && p_intf->p_sys->p_vout->b_die )
 214         {
 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;
 221         }
 222
 223         if( p_intf->p_sys->p_vout == NULL )
 224         {
 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 )
 228             {
 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 );
 233             }
 234         }
 235
 236         /* Wait a bit */
 237         msleep( INTF_IDLE_SLEEP );
 238     }
 239
 240     if( p_intf->p_sys->p_vout )
 241     {
 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 );
 247     }
 248 }
 249
 250 /*****************************************************************************
 251  * InitThread:
 252  *****************************************************************************/
 253 static int InitThread( intf_thread_t * p_intf )
 254 {
 255     char *psz_button;
 256     /* we might need some locking here */
 257     if( !p_intf->b_die )
 258     {
 259         input_thread_t * p_input;
 260
 261         p_input = vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_PARENT );
 262
 263         vlc_mutex_lock( &p_intf->change_lock );
 264
 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" ) )
 271         {
 272             p_intf->p_sys->i_button_mask = 1;
 273         }
 274         else if ( !strcmp( psz_button, "middle" ) )
 275         {
 276             p_intf->p_sys->i_button_mask = 2;
 277         }
 278         else if ( !strcmp( psz_button, "right" ) )
 279         {
 280             p_intf->p_sys->i_button_mask = 4;
 281         }
 282
 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 );
 286
 287         return 0;
 288     }
 289     else
 290     {
 291         return -1;
 292     }
 293 }
 294
 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 )
 300 {
 301     vlc_value_t val;
 302     int pattern = 0;
 303
 304     signed int i_horizontal, i_vertical;
 305     intf_thread_t *p_intf = (intf_thread_t *)p_data;
 306
 307     /* don't process new gestures before the last events are processed */
 308     if( p_intf->p_sys->b_got_gesture ) {
 309         return VLC_SUCCESS;
 310     }
 311
 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;
 324
 325         if ( i_horizontal < 0 )
 326         {
 327             msg_Dbg( p_intf, "left gesture(%d)", i_horizontal );
 328             pattern = LEFT;
 329         }
 330         else if ( i_horizontal > 0 )
 331         {
 332             msg_Dbg( p_intf, "right gesture(%d)", i_horizontal );
 333             pattern = RIGHT;
 334         }
 335         if ( i_vertical < 0 )
 336         {
 337             msg_Dbg( p_intf, "up gesture(%d)", i_vertical );
 338             pattern = UP;
 339         }
 340         else if ( i_vertical > 0 )
 341         {
 342             msg_Dbg( p_intf, "down gesture(%d)", i_vertical );
 343             pattern = DOWN;
 344         }
 345         if (pattern )
 346         {
 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 )
 350             {
 351                 p_intf->p_sys->i_pattern |= pattern << ( p_intf->p_sys->i_num_gestures * 4 );
 352                 p_intf->p_sys->i_num_gestures++;
 353             }
 354         }
 355
 356     }
 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 )
 359     {
 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;
 365     }
 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 )
 368     {
 369         p_intf->p_sys->b_button_pressed = VLC_FALSE;
 370         p_intf->p_sys->b_got_gesture = VLC_TRUE;
 371     }
 372
 373     vlc_mutex_unlock( &p_intf->change_lock );
 374
 375     return VLC_SUCCESS;
 376 }