1 /*****************************************************************************
2 * motion.c: control VLC with laptop built-in motion sensors
3 *****************************************************************************
4 * Copyright (C) 2006 - 2007 the VideoLAN team
7 * Author: Sam Hocevar <sam@zoy.org>
8 * Jérôme Decoodt <djc@videolan.org> (unimotion integration)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
31 #include <vlc_interface.h>
39 #include "unimotion.h"
42 /*****************************************************************************
43 * intf_sys_t: description and status of interface
44 *****************************************************************************/
47 enum { NO_SENSOR, HDAPS_SENSOR, AMS_SENSOR, UNIMOTION_SENSOR } sensor;
49 enum sms_hardware unimotion_hw;
53 vlc_bool_t b_use_rotate;
56 /*****************************************************************************
58 *****************************************************************************/
59 static int Open ( vlc_object_t * );
60 static void Close ( vlc_object_t * );
62 static void RunIntf( intf_thread_t *p_intf );
63 static int GetOrientation( intf_thread_t *p_intf );
65 #define USE_ROTATE_TEXT N_("Use the rotate video filter instead of transform")
67 /*****************************************************************************
69 *****************************************************************************/
71 set_shortname( _("motion"));
72 set_category( CAT_INTERFACE );
73 set_description( _("motion control interface") );
75 add_bool( "motion-use-rotate", 0, NULL,
76 USE_ROTATE_TEXT, USE_ROTATE_TEXT, VLC_FALSE );
78 set_capability( "interface", 0 );
79 set_callbacks( Open, Close );
82 /*****************************************************************************
83 * OpenIntf: initialise interface
84 *****************************************************************************/
85 int Open ( vlc_object_t *p_this )
87 intf_thread_t *p_intf = (intf_thread_t *)p_this;
91 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
92 if( p_intf->p_sys == NULL )
97 if( access( "/sys/devices/platform/hdaps/position", R_OK ) == 0 )
99 /* IBM HDAPS support */
100 f = fopen( "/sys/devices/platform/hdaps/calibrate", "r" );
104 fscanf( f, "(%d,%d)", &i_x, &i_y );
106 p_intf->p_sys->i_calibrate = i_x;
107 p_intf->p_sys->sensor = HDAPS_SENSOR;
111 p_intf->p_sys->sensor = NO_SENSOR;
114 else if( access( "/sys/devices/ams/x", R_OK ) == 0 )
116 /* Apple Motion Sensor support */
117 p_intf->p_sys->sensor = AMS_SENSOR;
120 else if( p_intf->p_sys->unimotion_hw = detect_sms() )
121 p_intf->p_sys->sensor = UNIMOTION_SENSOR;
125 /* No motion sensor support */
126 p_intf->p_sys->sensor = NO_SENSOR;
129 p_intf->pf_run = RunIntf;
131 p_intf->p_sys->b_use_rotate = config_GetInt( p_intf, "motion-use-rotate" );
136 /*****************************************************************************
137 * CloseIntf: destroy interface
138 *****************************************************************************/
139 void Close ( vlc_object_t *p_this )
141 intf_thread_t *p_intf = (intf_thread_t *)p_this;
143 free( p_intf->p_sys );
146 /*****************************************************************************
148 *****************************************************************************/
149 #define FILTER_LENGTH 16
150 #define LOW_THRESHOLD 800
151 #define HIGH_THRESHOLD 1000
152 static void RunIntf( intf_thread_t *p_intf )
154 int i_x, i_oldx = 0, i_sum = 0, i = 0;
155 int p_oldx[FILTER_LENGTH];
156 memset( p_oldx, 0, FILTER_LENGTH * sizeof( int ) );
158 while( !intf_ShouldDie( p_intf ) )
160 vout_thread_t *p_vout;
161 const char *psz_filter, *psz_type;
162 vlc_bool_t b_change = VLC_FALSE;
164 /* Wait a bit, get orientation, change filter if necessary */
165 msleep( INTF_IDLE_SLEEP );
167 i_x = GetOrientation( p_intf );
168 i_sum += i_x - p_oldx[i];
170 if( i == FILTER_LENGTH ) i = 0;
171 i_x = i_sum / FILTER_LENGTH;
173 if( p_intf->p_sys->b_use_rotate )
177 /* TODO: cache object pointer */
178 vlc_object_t *p_obj =
179 vlc_object_find_name( p_intf->p_libvlc, "rotate", FIND_CHILD );
182 var_SetInteger( p_obj, "rotate-deciangle",
183 ((3600+i_x/2)%3600) );
185 vlc_object_release( p_obj );
191 if( i_x < -HIGH_THRESHOLD && i_oldx > -LOW_THRESHOLD )
194 psz_filter = "transform";
197 else if( ( i_x > -LOW_THRESHOLD && i_oldx < -HIGH_THRESHOLD )
198 || ( i_x < LOW_THRESHOLD && i_oldx > HIGH_THRESHOLD ) )
204 else if( i_x > HIGH_THRESHOLD && i_oldx < LOW_THRESHOLD )
207 psz_filter = "transform";
216 p_vout = (vout_thread_t *)
217 vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_ANYWHERE );
223 config_PutPsz( p_vout, "transform-type", psz_type );
224 var_SetString( p_vout, "vout-filter", psz_filter );
225 vlc_object_release( p_vout );
232 #undef HIGH_THRESHOLD
234 /*****************************************************************************
235 * GetOrientation: get laptop orientation, range -1800 / +1800
236 *****************************************************************************/
237 static int GetOrientation( intf_thread_t *p_intf )
244 switch( p_intf->p_sys->sensor )
247 f = fopen( "/sys/devices/platform/hdaps/position", "r" );
254 fscanf( f, "(%d,%d)", &i_x, &i_y );
257 return ( i_x - p_intf->p_sys->i_calibrate ) * 10;
260 f = fopen( "/sys/devices/ams/x", "r" );
266 fscanf( f, "%d", &i_x);
269 return - i_x * 30; /* FIXME: arbitrary */
271 case UNIMOTION_SENSOR:
272 if( read_sms_raw( p_intf->p_sys->unimotion_hw, &i_x, &i_y, &i_z ) )
274 double d_norm = sqrt( i_x*i_x+i_z*i_z );
277 double d_x = i_x / d_norm;
279 return -asin(d_x)*3600/3.141;
281 return 3600 + asin(d_x)*3600/3.141;