*: a new mouse gestures interface, currently supporting back, forward, quit

fullscreen and a nice debug message when you draw a clockwise square. Video
output modules needs to be modified for this to work, but it should be minor
in modules supporting dvd navigation.

btw: it should be easy to add new gestures, ideas appreciated

modules/Makefile.am

@@ -28,6 +28,7 @@ EXTRA_DIST = \
 	codec/spudec/Modules.am \
 	control/lirc/Modules.am \
 	control/rc/Modules.am \
+	control/Modules.am \
 	demux/Modules.am \
 	demux/aac/Modules.am \
 	demux/avi/Modules.am \

modules/control/Modules.am

+SOURCES_gestures = modules/control/gestures.c

modules/control/gestures.c

+/*****************************************************************************
+ * geatures.c: control vlc with mouse gestures
+ *****************************************************************************
+ * Copyright (C) 2002 VideoLAN
+ * $Id: gestures.c,v 1.1 2003/02/09 23:42:06 sigmunau Exp $
+ *
+ * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h>                                      /* malloc(), free() */
+#include <string.h>
+#include <unistd.h>
+
+#include <vlc/vlc.h>
+#include <vlc/intf.h>
+#include <vlc/vout.h>
+
+#include "stream_control.h"
+#include "input_ext-intf.h"
+
+/*****************************************************************************
+ * intf_sys_t: description and status of interface
+ *****************************************************************************/
+struct intf_sys_t
+{
+    vlc_object_t *      p_vout;
+    input_thread_t *    p_input;
+    vlc_bool_t          b_got_gesture;
+    vlc_bool_t          b_button_pressed;
+    int                 i_mouse_x, i_mouse_y;
+    int                 i_last_x, i_last_y;
+    unsigned int        i_pattern;
+    int                 i_num_gestures;
+    int                 i_threshold;
+    int                 i_button_mask;
+};
+
+/*****************************************************************************
+ * Local prototypes.
+ *****************************************************************************/
+#define UP 1
+#define DOWN 2
+#define LEFT 3
+#define RIGHT 4
+#define NONE 0
+#define GESTURE( a, b, c, d ) (a | ( b << 4 ) | ( c << 8 ) | ( d << 12 ))
+
+int  E_(Open)   ( vlc_object_t * );
+void E_(Close)  ( vlc_object_t * );
+static int  InitThread     ( intf_thread_t *p_intf );
+static int  MouseEvent     ( vlc_object_t *, char const *,
+                             vlc_value_t, vlc_value_t, void * );
+
+/* Exported functions */
+static void RunIntf        ( intf_thread_t *p_intf );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+#define THRESHOLD_TEXT N_( "Motion threshold" )
+#define THRESHOLD_LONGTEXT N_( \
+    "the amount of movement required for a mouse" \
+    " gesture to be recorded" )
+
+#define BUTTON_TEXT N_( "Mouse button" )
+#define BUTTON_LONGTEXT N_( \
+    "the mouse button to be held down during mouse gestures" )
+
+static char *button_list[] = { "left", "middle", "right", NULL };
+
+vlc_module_begin();
+    add_category_hint( N_( "Gestures" ), NULL );
+    add_integer( "gestures-threshold", 30, NULL, THRESHOLD_TEXT, THRESHOLD_LONGTEXT );
+    add_string_from_list( "gestures-button", "right", button_list, NULL,
+                          BUTTON_TEXT, BUTTON_LONGTEXT );
+    set_description( _("mouse gestures control module") );
+
+    set_capability( "interface", 0 );
+    set_callbacks( E_(Open), E_(Close) );
+vlc_module_end();
+
+/*****************************************************************************
+ * OpenIntf: initialize interface
+ *****************************************************************************/
+int E_(Open) ( vlc_object_t *p_this )
+{
+    intf_thread_t *p_intf = (intf_thread_t *)p_this;
+
+    /* Allocate instance and initialize some members */
+    p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
+    if( p_intf->p_sys == NULL )
+    {
+        return( 1 );
+    };
+
+    p_intf->pf_run = RunIntf;
+
+    return( 0 );
+}
+
+/*****************************************************************************
+ * gesture: return a subpattern within a pattern
+ *****************************************************************************/
+static int gesture( int i_pattern, int i_num )
+{
+    return ( i_pattern >> ( i_num * 4 ) ) & 0xF;
+}
+        
+/*****************************************************************************
+ * CloseIntf: destroy dummy interface
+ *****************************************************************************/
+void E_(Close) ( vlc_object_t *p_this )
+{
+    intf_thread_t *p_intf = (intf_thread_t *)p_this;
+
+    /* Destroy structure */
+    free( p_intf->p_sys );
+}
+
+
+/*****************************************************************************
+ * RunIntf: main loop
+ *****************************************************************************/
+static void RunIntf( intf_thread_t *p_intf )
+{
+    playlist_t * p_playlist = NULL;
+    p_intf->p_sys->p_vout = NULL;
+
+    if( InitThread( p_intf ) < 0 )
+    {
+        msg_Err( p_intf, "can't initialize intf" );
+        return;
+    }
+    msg_Dbg( p_intf, "intf initialized" );
+
+    /* Main loop */
+    while( !p_intf->b_die )
+    {
+        vlc_mutex_lock( &p_intf->change_lock );
+
+        /* 
+         * mouse cursor
+         */
+        if( p_intf->p_sys->b_got_gesture )
+        {
+            /* Do something */
+            switch( p_intf->p_sys->i_pattern )
+            {
+            case LEFT:
+                p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
+                                              FIND_ANYWHERE );
+                if( p_playlist == NULL )
+                {
+                    break;
+                }
+                
+                playlist_Prev( p_playlist );
+                vlc_object_release( p_playlist );
+                break;
+            case RIGHT:
+                p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
+                                              FIND_ANYWHERE );
+                if( p_playlist == NULL )
+                {
+                    break;
+                }
+                
+                playlist_Next( p_playlist );
+                vlc_object_release( p_playlist );
+                break;
+
+            case DOWN:
+                if (p_intf->p_sys->p_vout
+                    && ((vout_thread_t *)p_intf->p_sys->p_vout)->b_fullscreen )
+                {
+                    ((vout_thread_t *)p_intf->p_sys->p_vout)->i_changes |= VOUT_FULLSCREEN_CHANGE;
+                }
+                break;
+            case GESTURE(DOWN,LEFT,UP,RIGHT):
+                msg_Dbg(p_intf, "A square!" );
+                break;
+            default:
+                break;
+            }
+            p_intf->p_sys->i_num_gestures = 0;
+            p_intf->p_sys->i_pattern = 0;
+            p_intf->p_sys->b_got_gesture = VLC_FALSE;
+        }
+                
+
+        vlc_mutex_unlock( &p_intf->change_lock );
+
+        /* 
+         * video output
+         */
+        if( p_intf->p_sys->p_vout && p_intf->p_sys->p_vout->b_die )
+        {
+            var_DelCallback( p_intf->p_sys->p_vout, "mouse-moved",
+                             MouseEvent, p_intf );
+            var_DelCallback( p_intf->p_sys->p_vout, "mouse-button-down",
+                             MouseEvent, p_intf );
+            vlc_object_release( p_intf->p_sys->p_vout );
+            p_intf->p_sys->p_vout = NULL;
+        }
+
+        if( p_intf->p_sys->p_vout == NULL )
+        {
+            p_intf->p_sys->p_vout = vlc_object_find( p_intf,
+                                      VLC_OBJECT_VOUT, FIND_ANYWHERE );
+            if( p_intf->p_sys->p_vout )
+            {
+                var_AddCallback( p_intf->p_sys->p_vout, "mouse-moved",
+                                 MouseEvent, p_intf );
+                var_AddCallback( p_intf->p_sys->p_vout, "mouse-button-down",
+                                 MouseEvent, p_intf );
+            }
+        }
+
+        /* Wait a bit */
+        msleep( INTF_IDLE_SLEEP );
+    }
+
+    if( p_intf->p_sys->p_vout )
+    {
+        var_DelCallback( p_intf->p_sys->p_vout, "mouse-moved",
+                         MouseEvent, p_intf );
+        var_DelCallback( p_intf->p_sys->p_vout, "mouse-button-down",
+                         MouseEvent, p_intf );
+        vlc_object_release( p_intf->p_sys->p_vout );
+    }
+}
+
+/*****************************************************************************
+ * InitThread:
+ *****************************************************************************/
+static int InitThread( intf_thread_t * p_intf )
+{
+    char *psz_button;
+    /* we might need some locking here */
+    if( !p_intf->b_die )
+    {
+        input_thread_t * p_input;
+
+        p_input = vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_PARENT );
+
+        vlc_mutex_lock( &p_intf->change_lock );
+
+        p_intf->p_sys->p_input = p_input;
+        p_intf->p_sys->b_got_gesture = VLC_FALSE;
+        p_intf->p_sys->b_button_pressed = VLC_FALSE;
+        p_intf->p_sys->i_threshold = config_GetInt( p_intf, "gestures-threshold" );
+        psz_button = config_GetPsz( p_intf, "gestures-button" );
+        if ( !strcmp( psz_button, "left" ) )
+        {
+            p_intf->p_sys->i_button_mask = 1;
+        }
+        else if ( !strcmp( psz_button, "middle" ) )
+        {
+            p_intf->p_sys->i_button_mask = 2;
+        }
+        else if ( !strcmp( psz_button, "right" ) )
+        {
+            p_intf->p_sys->i_button_mask = 4;
+        }
+
+        p_intf->p_sys->i_pattern = 0;
+        p_intf->p_sys->i_num_gestures = 0;
+        vlc_mutex_unlock( &p_intf->change_lock );
+
+        return 0;
+    }
+    else
+    {
+        return -1;
+    }
+}
+
+/*****************************************************************************
+ * MouseEvent: callback for mouse events
+ *****************************************************************************/
+static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
+                       vlc_value_t oldval, vlc_value_t newval, void *p_data )
+{
+    vlc_value_t val;
+    int pattern = 0;
+    
+    signed int i_horizontal, i_vertical;
+    intf_thread_t *p_intf = (intf_thread_t *)p_data;
+
+    /* don't process new gestures before the last events are processed */
+    if( p_intf->p_sys->b_got_gesture ) {
+        return VLC_SUCCESS;
+    }
+
+    vlc_mutex_lock( &p_intf->change_lock );
+    if( !strcmp(psz_var, "mouse-moved" ) && p_intf->p_sys->b_button_pressed ) {
+        var_Get( p_intf->p_sys->p_vout, "mouse-x", &val );
+        p_intf->p_sys->i_mouse_x = val.i_int;
+        var_Get( p_intf->p_sys->p_vout, "mouse-y", &val );
+        p_intf->p_sys->i_mouse_y = val.i_int;
+        i_horizontal = p_intf->p_sys->i_mouse_x -
+            p_intf->p_sys->i_last_x;
+        i_horizontal = i_horizontal / p_intf->p_sys->i_threshold;
+        i_vertical = p_intf->p_sys->i_mouse_y
+            - p_intf->p_sys->i_last_y;
+        i_vertical = i_vertical / p_intf->p_sys->i_threshold;
+        
+        if ( i_horizontal < 0 )
+        {
+            msg_Dbg( p_intf, "left gesture(%d)", i_horizontal );
+            pattern = LEFT;
+        }
+        else if ( i_horizontal > 0 )
+        {
+            msg_Dbg( p_intf, "right gesture(%d)", i_horizontal );
+            pattern = RIGHT;
+        }
+        if ( i_vertical < 0 )
+        {
+            msg_Dbg( p_intf, "up gesture(%d)", i_vertical );
+            pattern = UP;
+        }
+        else if ( i_vertical > 0 )
+        {
+            msg_Dbg( p_intf, "down gesture(%d)", i_vertical );
+            pattern = DOWN;
+        }
+        if (pattern )
+        {
+            p_intf->p_sys->i_last_y = p_intf->p_sys->i_mouse_y;
+            p_intf->p_sys->i_last_x = p_intf->p_sys->i_mouse_x;
+            if( gesture(p_intf->p_sys->i_pattern, p_intf->p_sys->i_num_gestures - 1 ) != pattern )
+            {
+                p_intf->p_sys->i_pattern |= pattern << ( p_intf->p_sys->i_num_gestures * 4 );
+                p_intf->p_sys->i_num_gestures++;
+            }
+        }
+
+    }
+    if( !strcmp( psz_var, "mouse-button-down" ) && newval.i_int & p_intf->p_sys->i_button_mask
+        && !p_intf->p_sys->b_button_pressed )
+    {
+        p_intf->p_sys->b_button_pressed = VLC_TRUE;
+        var_Get( p_intf->p_sys->p_vout, "mouse-x", &val );
+        p_intf->p_sys->i_last_x = val.i_int;
+        var_Get( p_intf->p_sys->p_vout, "mouse-y", &val );
+        p_intf->p_sys->i_last_y = val.i_int;
+    }
+    if( !strcmp( psz_var, "mouse-button-down" ) && !( newval.i_int & p_intf->p_sys->i_button_mask )
+        && p_intf->p_sys->b_button_pressed )
+    {
+        p_intf->p_sys->b_button_pressed = VLC_FALSE;
+        p_intf->p_sys->b_got_gesture = VLC_TRUE;
+    }
+
+    vlc_mutex_unlock( &p_intf->change_lock );
+
+    return VLC_SUCCESS;
+}

modules/video_output/x11/xcommon.c

@@ -2,7 +2,7 @@
  * xcommon.c: Functions common to the X11 and XVideo plugins
  *****************************************************************************
  * Copyright (C) 1998-2001 VideoLAN
- * $Id: xcommon.c,v 1.13 2003/02/01 18:54:10 sam Exp $
+ * $Id: xcommon.c,v 1.14 2003/02/09 23:42:06 sigmunau Exp $
  *
  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  *          Samuel Hocevar <sam@zoy.org>
@@ -613,6 +613,9 @@ static int ManageVideo( vout_thread_t *p_vout )
             switch( ((XButtonEvent *)&xevent)->button )
             {
                 case Button1:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int |= 1;
+                    var_Set( p_vout, "mouse-button-down", val );
                     
                     /* detect double-clicks */
                     if( ( ((XButtonEvent *)&xevent)->time -
@@ -624,12 +627,29 @@ static int ManageVideo( vout_thread_t *p_vout )
                     p_vout->p_sys->i_time_button_last_pressed =
                         ((XButtonEvent *)&xevent)->time;
                     break;
+                case Button2:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int |= 2;
+                    var_Set( p_vout, "mouse-button-down", val );
+                    break;
+                
+                case Button3:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int |= 4;
+                    var_Set( p_vout, "mouse-button-down", val );
+                    break;
                 
                 case Button4:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int |= 8;
+                    var_Set( p_vout, "mouse-button-down", val );
                     input_Seek( p_vout, 15, INPUT_SEEK_SECONDS | INPUT_SEEK_CUR );
                     break;
 
                 case Button5:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int |= 16;
+                    var_Set( p_vout, "mouse-button-down", val );
                     input_Seek( p_vout, -15, INPUT_SEEK_SECONDS | INPUT_SEEK_CUR );
                     break;
             }
@@ -640,13 +660,26 @@ static int ManageVideo( vout_thread_t *p_vout )
             switch( ((XButtonEvent *)&xevent)->button )
             {
                 case Button1:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int &= ~1;
+                    var_Set( p_vout, "mouse-button-down", val );
+
                     val.b_bool = VLC_TRUE;
                     var_Set( p_vout, "mouse-clicked", val );
                     break;
                     
+                case Button2:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int &= ~2;
+                    var_Set( p_vout, "mouse-button-down", val );
+                    break;
+                    
                 case Button3:
                     {
                         intf_thread_t *p_intf;
+                        var_Get( p_vout, "mouse-button-down", &val );
+                        val.i_int &= ~4;
+                        var_Set( p_vout, "mouse-button-down", val );
                         p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
                                                           FIND_ANYWHERE );
                         if( p_intf )
@@ -656,6 +689,19 @@ static int ManageVideo( vout_thread_t *p_vout )
                         }
                     }
                     break;
+
+                case Button4:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int &= ~8;
+                    var_Set( p_vout, "mouse-button-down", val );
+                    break;
+
+                case Button5:
+                    var_Get( p_vout, "mouse-button-down", &val );
+                    val.i_int &= ~16;
+                    var_Set( p_vout, "mouse-button-down", val );
+                    break;
+                    
             }
         }
         /* Mouse move */

src/video_output/video_output.c

@@ -5,7 +5,7 @@
  * thread, and destroy a previously oppened video output thread.
  *****************************************************************************
  * Copyright (C) 2000-2001 VideoLAN
- * $Id: video_output.c,v 1.211 2003/01/30 19:14:17 gbazin Exp $
+ * $Id: video_output.c,v 1.212 2003/02/09 23:42:06 sigmunau Exp $
  *
  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  *
@@ -327,6 +327,7 @@ vout_thread_t * __vout_Create( vlc_object_t *p_parent,
     /* Mouse coordinates */
     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
+    var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
     var_Create( p_vout, "key-pressed", VLC_VAR_STRING );