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430 lines
14 KiB
430 lines
14 KiB
/*****************************************************************************
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* gestures.c: control vlc with mouse gestures
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*****************************************************************************
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* Copyright (C) 2004-2009 the VideoLAN team
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*
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* Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
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#include <vlc_common.h>
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#include <vlc_plugin.h>
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#include <vlc_interface.h>
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#include <vlc_vout.h>
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#include <vlc_player.h>
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#include <vlc_playlist.h>
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#include <vlc_vector.h>
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#include <assert.h>
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/*****************************************************************************
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* intf_sys_t: description and status of interface
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*****************************************************************************/
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typedef struct VLC_VECTOR(vout_thread_t *) vout_vector;
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struct intf_sys_t
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{
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vlc_playlist_t *playlist;
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vlc_player_listener_id *player_listener;
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vlc_mutex_t lock;
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vout_vector vout_vector;
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bool b_button_pressed;
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int i_last_x, i_last_y;
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unsigned int i_pattern;
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unsigned int i_num_gestures;
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int i_threshold;
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int i_button_mask;
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};
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/*****************************************************************************
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* Local prototypes.
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*****************************************************************************/
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#define UP 1
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#define DOWN 2
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#define LEFT 3
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#define RIGHT 4
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#define NONE 0
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#define GESTURE( a, b, c, d ) (a | ( b << 4 ) | ( c << 8 ) | ( d << 12 ))
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static int Open ( vlc_object_t * );
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static void Close ( vlc_object_t * );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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#define THRESHOLD_TEXT N_( "Motion threshold (10-100)" )
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#define THRESHOLD_LONGTEXT N_( \
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"Amount of movement required for a mouse gesture to be recorded." )
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#define BUTTON_TEXT N_( "Trigger button" )
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#define BUTTON_LONGTEXT N_( \
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"Trigger button for mouse gestures." )
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#define BUTTON_DEFAULT "left"
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static const char *const button_list[] = { "left", "middle", "right" };
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static const char *const button_list_text[] =
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{ N_("Left"), N_("Middle"), N_("Right") };
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vlc_module_begin ()
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set_shortname( N_("Gestures"))
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set_subcategory( SUBCAT_INTERFACE_CONTROL )
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add_integer( "gestures-threshold", 30,
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THRESHOLD_TEXT, THRESHOLD_LONGTEXT )
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add_string( "gestures-button", BUTTON_DEFAULT,
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BUTTON_TEXT, BUTTON_LONGTEXT )
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change_string_list( button_list, button_list_text )
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set_description( N_("Mouse gestures control interface") )
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set_capability( "interface", 0 )
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set_callbacks( Open, Close )
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vlc_module_end ()
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static void player_on_vout_changed(vlc_player_t *player,
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enum vlc_player_vout_action action,
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vout_thread_t *vout,
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enum vlc_vout_order order,
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vlc_es_id_t *es_id,
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void *data);
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static int MovedEvent( vlc_object_t *, char const *,
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vlc_value_t, vlc_value_t, void * );
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static int ButtonEvent( vlc_object_t *, char const *,
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vlc_value_t, vlc_value_t, void * );
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/*****************************************************************************
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* OpenIntf: initialize interface
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*****************************************************************************/
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static int Open ( vlc_object_t *p_this )
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{
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intf_thread_t *p_intf = (intf_thread_t *)p_this;
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/* Allocate instance and initialize some members */
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intf_sys_t *p_sys = p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
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if( unlikely(p_sys == NULL) )
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return VLC_ENOMEM;
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// Configure the module
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p_sys->playlist = vlc_intf_GetMainPlaylist(p_intf);
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vlc_mutex_init( &p_sys->lock );
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vlc_vector_init(&p_sys->vout_vector);
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static const struct vlc_player_cbs cbs =
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{
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.on_vout_changed = player_on_vout_changed,
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};
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vlc_player_t *player = vlc_playlist_GetPlayer(p_sys->playlist);
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vlc_player_Lock(player);
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p_sys->player_listener = vlc_player_AddListener(player, &cbs, p_intf);
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vlc_player_Unlock(player);
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if (!p_sys->player_listener)
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goto error;
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p_sys->b_button_pressed = false;
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p_sys->i_threshold = var_InheritInteger( p_intf, "gestures-threshold" );
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// Choose the tight button to use
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char *psz_button = var_InheritString( p_intf, "gestures-button" );
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if( psz_button && !strcmp( psz_button, "left" ) )
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p_sys->i_button_mask = 1;
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else if( psz_button && !strcmp( psz_button, "middle" ) )
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p_sys->i_button_mask = 2;
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else // psz_button == "right"
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p_sys->i_button_mask = 4;
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free( psz_button );
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p_sys->i_pattern = 0;
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p_sys->i_num_gestures = 0;
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return VLC_SUCCESS;
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error:
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vlc_vector_clear(&p_sys->vout_vector);
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free(p_sys);
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return VLC_EGENERIC;
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}
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/*****************************************************************************
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* gesture: return a subpattern within a pattern
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*****************************************************************************/
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static inline unsigned gesture( unsigned i_pattern, unsigned i_num )
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{
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return ( i_pattern >> ( i_num * 4 ) ) & 0xF;
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}
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/*****************************************************************************
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* CloseIntf: destroy dummy interface
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*****************************************************************************/
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static void Close ( vlc_object_t *p_this )
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{
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intf_thread_t *p_intf = (intf_thread_t *)p_this;
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intf_sys_t *p_sys = p_intf->p_sys;
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vlc_player_t *player = vlc_playlist_GetPlayer(p_sys->playlist);
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vlc_player_Lock(player);
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vlc_player_RemoveListener(player, p_sys->player_listener);
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vlc_player_Unlock(player);
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/* Destroy the callbacks (the order matters!) */
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vout_thread_t *vout;
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vlc_vector_foreach(vout, &p_sys->vout_vector)
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{
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var_DelCallback(vout, "mouse-moved", MovedEvent, p_intf);
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var_DelCallback(vout, "mouse-button-down", ButtonEvent, p_intf);
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vout_Release(vout);
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}
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vlc_vector_clear(&p_sys->vout_vector);
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/* Destroy structure */
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free( p_sys );
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}
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static void ProcessGesture( intf_thread_t *p_intf )
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{
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intf_sys_t *p_sys = p_intf->p_sys;
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vlc_playlist_t *playlist = p_sys->playlist;
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vlc_player_t *player = vlc_playlist_GetPlayer(playlist);
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/* Do something */
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/* If you modify this, please try to follow this convention:
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Start with LEFT, RIGHT for playback related commands
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and UP, DOWN, for other commands */
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vlc_playlist_Lock(playlist);
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switch( p_sys->i_pattern )
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{
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case LEFT:
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case RIGHT:
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{
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msg_Dbg( p_intf, "Go %s in the movie!",
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p_sys->i_pattern == LEFT ? "backward" : "forward" );
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int it = var_InheritInteger( p_intf , "short-jump-size" );
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if( it > 0 )
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{
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vlc_tick_t jump = p_sys->i_pattern == LEFT ? -it : it;
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vlc_player_JumpTime(player, vlc_tick_from_sec(jump));
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}
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break;
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}
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case GESTURE(LEFT,UP,NONE,NONE):
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msg_Dbg( p_intf, "Going slower." );
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vlc_player_DecrementRate(player);
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break;
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case GESTURE(RIGHT,UP,NONE,NONE):
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msg_Dbg( p_intf, "Going faster." );
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vlc_player_IncrementRate(player);
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break;
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case GESTURE(LEFT,RIGHT,NONE,NONE):
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case GESTURE(RIGHT,LEFT,NONE,NONE):
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{
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msg_Dbg( p_intf, "Play/Pause" );
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vlc_player_TogglePause(player);
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break;
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}
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case GESTURE(LEFT,DOWN,NONE,NONE):
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vlc_playlist_Prev(playlist);
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break;
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case GESTURE(RIGHT,DOWN,NONE,NONE):
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vlc_playlist_Next(playlist);
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break;
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case UP:
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msg_Dbg(p_intf, "Louder");
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vlc_player_aout_IncrementVolume(player, 1, NULL);
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break;
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case DOWN:
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msg_Dbg(p_intf, "Quieter");
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vlc_player_aout_DecrementVolume(player, 1, NULL);
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break;
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case GESTURE(UP,DOWN,NONE,NONE):
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case GESTURE(DOWN,UP,NONE,NONE):
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msg_Dbg( p_intf, "Mute sound" );
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vlc_player_aout_ToggleMute(player);
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break;
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case GESTURE(UP,RIGHT,NONE,NONE):
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case GESTURE(DOWN,RIGHT,NONE,NONE):
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{
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enum es_format_category_e cat =
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p_sys->i_pattern == GESTURE(UP,RIGHT,NONE,NONE) ?
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AUDIO_ES : SPU_ES;
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vlc_player_SelectNextTrack(player, cat, VLC_VOUT_ORDER_PRIMARY);
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break;
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}
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case GESTURE(UP,LEFT,NONE,NONE):
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{
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vlc_player_vout_ToggleFullscreen(player);
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break;
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}
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case GESTURE(DOWN,LEFT,NONE,NONE):
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vlc_playlist_Unlock(playlist);
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/* FIXME: Should close the vout!"*/
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libvlc_Quit( vlc_object_instance(p_intf) );
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break;
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case GESTURE(DOWN,LEFT,UP,RIGHT):
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case GESTURE(UP,RIGHT,DOWN,LEFT):
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msg_Dbg( p_intf, "a square was drawn!" );
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break;
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}
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vlc_playlist_Unlock(playlist);
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p_sys->i_num_gestures = 0;
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p_sys->i_pattern = 0;
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}
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static int MovedEvent(vlc_object_t *this, char const *psz_var,
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vlc_value_t oldval, vlc_value_t newval, void *data)
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{
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VLC_UNUSED(this); VLC_UNUSED(psz_var); VLC_UNUSED(oldval);
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intf_thread_t *intf = data;
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intf_sys_t *sys = intf->p_sys;
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vlc_mutex_lock(&sys->lock);
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if (sys->b_button_pressed)
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{
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unsigned int pattern = 0;
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int xdelta = newval.coords.x - sys->i_last_x;
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xdelta /= sys->i_threshold;
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int ydelta = newval.coords.y - sys->i_last_y;
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ydelta /= sys->i_threshold;
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char const *dir;
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unsigned int delta;
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if (abs(xdelta) > abs(ydelta))
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{
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pattern = xdelta < 0 ? LEFT : RIGHT;
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dir = xdelta < 0 ? "left" : "right";
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delta = abs(xdelta);
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}
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else if (abs(ydelta) > 0)
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{
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pattern = ydelta < 0 ? UP : DOWN;
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dir = ydelta < 0 ? "up" : "down";
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delta = abs(ydelta);
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}
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if (pattern)
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{
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sys->i_last_x = newval.coords.x;
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sys->i_last_y = newval.coords.y;
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if (sys->i_num_gestures > 0 &&
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gesture(sys->i_pattern, sys->i_num_gestures - 1) != pattern)
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{
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sys->i_pattern |= pattern << (sys->i_num_gestures * 4);
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sys->i_num_gestures++;
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}
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else if (sys->i_num_gestures == 0)
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{
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sys->i_pattern = pattern;
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sys->i_num_gestures = 1;
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}
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msg_Dbg(intf, "%s gesture (%u)", dir, delta);
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}
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}
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vlc_mutex_unlock(&sys->lock);
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return VLC_SUCCESS;
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}
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static int ButtonEvent( vlc_object_t *p_this, char const *psz_var,
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vlc_value_t oldval, vlc_value_t val, void *p_data )
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{
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intf_thread_t *p_intf = p_data;
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intf_sys_t *p_sys = p_intf->p_sys;
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(void) psz_var; (void) oldval;
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vlc_mutex_lock( &p_sys->lock );
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if( val.i_int & p_sys->i_button_mask )
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{
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if( !p_sys->b_button_pressed )
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{
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p_sys->b_button_pressed = true;
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var_GetCoords( p_this, "mouse-moved",
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&p_sys->i_last_x, &p_sys->i_last_y );
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}
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}
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else
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{
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if( p_sys->b_button_pressed )
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{
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p_sys->b_button_pressed = false;
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ProcessGesture( p_intf );
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}
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}
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vlc_mutex_unlock( &p_sys->lock );
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return VLC_SUCCESS;
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}
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static void
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player_on_vout_changed(vlc_player_t *player,
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enum vlc_player_vout_action action,
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vout_thread_t *vout,
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enum vlc_vout_order order,
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vlc_es_id_t *es_id, void *data)
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{
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VLC_UNUSED(player); VLC_UNUSED(order);
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intf_thread_t *intf = data;
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intf_sys_t *sys = intf->p_sys;
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if (vlc_es_id_GetCat(es_id) != VIDEO_ES)
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return;
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switch (action)
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{
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case VLC_PLAYER_VOUT_STARTED:
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if (vlc_vector_push(&sys->vout_vector, vout))
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{
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vout_Hold(vout);
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var_AddCallback(vout, "mouse-moved", MovedEvent, intf);
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var_AddCallback(vout, "mouse-button-down", ButtonEvent, intf);
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}
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break;
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case VLC_PLAYER_VOUT_STOPPED:
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for (size_t i = 0; i < sys->vout_vector.size; ++i)
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{
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vout_thread_t *it = sys->vout_vector.data[i];
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if (it == vout)
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{
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vlc_vector_remove(&sys->vout_vector, i);
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var_DelCallback(vout, "mouse-moved", MovedEvent, intf);
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var_DelCallback(vout, "mouse-button-down", ButtonEvent, intf);
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vout_Release(vout);
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break;
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}
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}
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break;
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default:
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vlc_assert_unreachable();
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}
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}
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