--- /dev/null
+/*****************************************************************************
+ * motion.c: control VLC with laptop built-in motion sensors
+ *****************************************************************************
+ * Copyright (C) 2006 the VideoLAN team
+ * $Id$
+ *
+ * Author: Sam Hocevar <sam@zoy.org>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h> /* malloc(), free() */
+#include <string.h>
+
+#include <vlc/vlc.h>
+#include <vlc/intf.h>
+#include <vlc/vout.h>
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+/*****************************************************************************
+ * intf_sys_t: description and status of interface
+ *****************************************************************************/
+struct intf_sys_t
+{
+ enum { NO_SENSOR, HDAPS_SENSOR, AMS_SENSOR } sensor;
+
+ int i_last_x, i_calibrate;
+ int i_threshold;
+};
+
+/*****************************************************************************
+ * Local prototypes.
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close ( vlc_object_t * );
+
+static void RunIntf( intf_thread_t *p_intf );
+static int GetOrientation( intf_thread_t *p_intf );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ set_shortname( _("motion"));
+ set_category( CAT_INTERFACE );
+ set_description( _("motion control interface") );
+
+ set_capability( "interface", 0 );
+ set_callbacks( Open, Close );
+vlc_module_end();
+
+/*****************************************************************************
+ * OpenIntf: initialise interface
+ *****************************************************************************/
+int Open ( vlc_object_t *p_this )
+{
+ intf_thread_t *p_intf = (intf_thread_t *)p_this;
+ FILE *f;
+ int i_x, i_y;
+
+ p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
+ if( p_intf->p_sys == NULL )
+ {
+ return VLC_ENOMEM;
+ }
+
+ if( access( "/sys/devices/platform/hdaps/position", R_OK ) == 0 )
+ {
+ /* IBM HDAPS support */
+ f = fopen( "/sys/devices/platform/hdaps/calibrate", "r" );
+ if( f )
+ {
+ i_x = i_y = 0;
+ fscanf( f, "(%d,%d)", &i_x, &i_y );
+ fclose( f );
+ p_intf->p_sys->i_calibrate = i_x;
+ p_intf->p_sys->sensor = HDAPS_SENSOR;
+ }
+ else
+ {
+ p_intf->p_sys->sensor = NO_SENSOR;
+ }
+ }
+ else if( access( "/sys/devices/ams/x", R_OK ) == 0 )
+ {
+ /* Apple Motion Sensor support */
+ p_intf->p_sys->sensor = AMS_SENSOR;
+ }
+ else
+ {
+ /* No motion sensor support */
+ p_intf->p_sys->sensor = NO_SENSOR;
+ }
+
+ p_intf->pf_run = RunIntf;
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * CloseIntf: destroy interface
+ *****************************************************************************/
+void Close ( vlc_object_t *p_this )
+{
+ intf_thread_t *p_intf = (intf_thread_t *)p_this;
+
+ free( p_intf->p_sys );
+}
+
+/*****************************************************************************
+ * RunIntf: main loop
+ *****************************************************************************/
+static void RunIntf( intf_thread_t *p_intf )
+{
+ int i_x, i_oldx = 0;
+
+ while( !p_intf->b_die )
+ {
+#define LOW_THRESHOLD 80
+#define HIGH_THRESHOLD 100
+ vout_thread_t *p_vout;
+ char *psz_filter, *psz_type;
+ vlc_bool_t b_change = VLC_FALSE;
+
+ /* Wait a bit, get orientation, change filter if necessary */
+ msleep( INTF_IDLE_SLEEP );
+
+ i_x = GetOrientation( p_intf );
+
+ if( i_x < -HIGH_THRESHOLD && i_oldx > -LOW_THRESHOLD )
+ {
+ b_change = VLC_TRUE;
+ psz_filter = "transform";
+ psz_type = "270";
+ }
+ else if( ( i_x > -LOW_THRESHOLD && i_oldx < -HIGH_THRESHOLD )
+ || ( i_x < LOW_THRESHOLD && i_oldx > HIGH_THRESHOLD ) )
+ {
+ b_change = VLC_TRUE;
+ psz_filter = "";
+ psz_type = "";
+ }
+ else if( i_x > HIGH_THRESHOLD && i_oldx < LOW_THRESHOLD )
+ {
+ b_change = VLC_TRUE;
+ psz_filter = "transform";
+ psz_type = "90";
+ }
+
+ if( !b_change )
+ {
+ continue;
+ }
+
+ p_vout = (vout_thread_t *)
+ vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_ANYWHERE );
+ if( !p_vout )
+ {
+ continue;
+ }
+
+ config_PutPsz( p_vout, "transform-type", psz_type );
+ var_SetString( p_vout, "vout-filter", psz_filter );
+ vlc_object_release( p_vout );
+
+ i_oldx = i_x;
+ }
+}
+
+/*****************************************************************************
+ * GetOrientation: get laptop orientation, range -180 / +180
+ *****************************************************************************/
+static int GetOrientation( intf_thread_t *p_intf )
+{
+ FILE *f;
+ int i_x, i_y;
+
+ switch( p_intf->p_sys->sensor )
+ {
+ case HDAPS_SENSOR:
+ f = fopen( "/sys/devices/platform/hdaps/position", "r" );
+ if( !f )
+ {
+ return 0;
+ }
+
+ i_x = i_y = 0;
+ fscanf( f, "(%d,%d)", &i_x, &i_y );
+ fclose( f );
+
+ return i_x - p_intf->p_sys->i_calibrate;
+
+ case AMS_SENSOR:
+ f = fopen( "/sys/devices/ams/x", "r" );
+ if( !f )
+ {
+ return 0;
+ }
+
+ fscanf( f, "%d", &i_x);
+ fclose( f );
+
+ return - i_x * 3; /* FIXME: arbitrary */
+
+ default:
+ return 0;
+ }
+}
+