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 *****************************************************************************/
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37 #include <vlc_interface.h>
45 #include "unimotion.h"
48 /*****************************************************************************
49 * intf_sys_t: description and status of interface
50 *****************************************************************************/
53 enum { NO_SENSOR, HDAPS_SENSOR, AMS_SENSOR, APPLESMC_SENSOR,
54 UNIMOTION_SENSOR } sensor;
56 enum sms_hardware unimotion_hw;
63 /*****************************************************************************
65 *****************************************************************************/
66 static int Open ( vlc_object_t * );
67 static void Close ( vlc_object_t * );
69 static void RunIntf( intf_thread_t *p_intf );
70 static int GetOrientation( intf_thread_t *p_intf );
72 #define USE_ROTATE_TEXT N_("Use the rotate video filter instead of transform")
74 /*****************************************************************************
76 *****************************************************************************/
78 set_shortname( N_("motion"))
79 set_category( CAT_INTERFACE )
80 set_subcategory( SUBCAT_INTERFACE_CONTROL )
81 set_description( N_("motion control interface") )
82 set_help( N_("Use HDAPS, AMS, APPLESMC or UNIMOTION motion sensors " \
83 "to rotate the video") )
85 add_bool( "motion-use-rotate", false, NULL,
86 USE_ROTATE_TEXT, USE_ROTATE_TEXT, false )
88 set_capability( "interface", 0 )
89 set_callbacks( Open, Close )
92 /*****************************************************************************
93 * OpenIntf: initialise interface
94 *****************************************************************************/
95 int Open ( vlc_object_t *p_this )
97 intf_thread_t *p_intf = (intf_thread_t *)p_this;
101 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
102 if( p_intf->p_sys == NULL )
107 if( access( "/sys/devices/platform/hdaps/position", R_OK ) == 0 )
109 /* IBM HDAPS support */
110 f = fopen( "/sys/devices/platform/hdaps/calibrate", "r" );
114 fscanf( f, "(%d,%d)", &i_x, &i_y );
116 p_intf->p_sys->i_calibrate = i_x;
117 p_intf->p_sys->sensor = HDAPS_SENSOR;
121 p_intf->p_sys->sensor = NO_SENSOR;
124 else if( access( "/sys/devices/ams/x", R_OK ) == 0 )
126 /* Apple Motion Sensor support */
127 p_intf->p_sys->sensor = AMS_SENSOR;
129 else if( access( "/sys/devices/applesmc.768/position", R_OK ) == 0 )
131 /* Apple SMC (newer macbooks) */
132 /* Should be factorised with HDAPS */
133 f = fopen( "/sys/devices/applesmc.768/calibrate", "r" );
137 fscanf( f, "(%d,%d)", &i_x, &i_y );
139 p_intf->p_sys->i_calibrate = i_x;
140 p_intf->p_sys->sensor = APPLESMC_SENSOR;
144 p_intf->p_sys->sensor = NO_SENSOR;
148 else if((p_intf->p_sys->unimotion_hw = detect_sms()))
149 p_intf->p_sys->sensor = UNIMOTION_SENSOR;
153 /* No motion sensor support */
154 p_intf->p_sys->sensor = NO_SENSOR;
157 p_intf->pf_run = RunIntf;
159 p_intf->p_sys->b_use_rotate = config_GetInt( p_intf, "motion-use-rotate" );
164 /*****************************************************************************
165 * CloseIntf: destroy interface
166 *****************************************************************************/
167 void Close ( vlc_object_t *p_this )
169 intf_thread_t *p_intf = (intf_thread_t *)p_this;
171 free( p_intf->p_sys );
174 /*****************************************************************************
176 *****************************************************************************/
177 #define FILTER_LENGTH 16
178 #define LOW_THRESHOLD 800
179 #define HIGH_THRESHOLD 1000
180 static void RunIntf( intf_thread_t *p_intf )
182 int i_x, i_oldx = 0, i_sum = 0, i = 0;
183 int p_oldx[FILTER_LENGTH];
184 memset( p_oldx, 0, FILTER_LENGTH * sizeof( int ) );
188 vout_thread_t *p_vout;
189 const char *psz_filter, *psz_type;
190 bool b_change = false;
192 /* Wait a bit, get orientation, change filter if necessary */
193 msleep( INTF_IDLE_SLEEP );
195 int canc = vlc_savecancel();
196 i_x = GetOrientation( p_intf );
197 i_sum += i_x - p_oldx[i];
199 if( i == FILTER_LENGTH ) i = 0;
200 i_x = i_sum / FILTER_LENGTH;
202 if( p_intf->p_sys->b_use_rotate )
206 /* TODO: cache object pointer */
207 vlc_object_t *p_obj =
208 vlc_object_find_name( p_intf->p_libvlc, "rotate", FIND_CHILD );
211 var_SetInteger( p_obj, "rotate-deciangle",
212 ((3600+i_x/2)%3600) );
214 vlc_object_release( p_obj );
220 if( i_x < -HIGH_THRESHOLD && i_oldx > -LOW_THRESHOLD )
223 psz_filter = "transform";
226 else if( ( i_x > -LOW_THRESHOLD && i_oldx < -HIGH_THRESHOLD )
227 || ( i_x < LOW_THRESHOLD && i_oldx > HIGH_THRESHOLD ) )
233 else if( i_x > HIGH_THRESHOLD && i_oldx < LOW_THRESHOLD )
236 psz_filter = "transform";
242 p_vout = (vout_thread_t *)
243 vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_ANYWHERE );
246 config_PutPsz( p_vout, "transform-type", psz_type );
247 var_SetString( p_vout, "vout-filter", psz_filter );
248 vlc_object_release( p_vout );
254 vlc_restorecancel( canc );
259 #undef HIGH_THRESHOLD
261 /*****************************************************************************
262 * GetOrientation: get laptop orientation, range -1800 / +1800
263 *****************************************************************************/
264 static int GetOrientation( intf_thread_t *p_intf )
267 int i_x, i_y, i_z = 0;
269 switch( p_intf->p_sys->sensor )
272 f = fopen( "/sys/devices/platform/hdaps/position", "r" );
279 fscanf( f, "(%d,%d)", &i_x, &i_y );
282 return ( i_x - p_intf->p_sys->i_calibrate ) * 10;
285 f = fopen( "/sys/devices/ams/x", "r" );
291 fscanf( f, "%d", &i_x);
294 return - i_x * 30; /* FIXME: arbitrary */
296 case APPLESMC_SENSOR:
297 f = fopen( "/sys/devices/applesmc.768/position", "r" );
304 fscanf( f, "(%d,%d,%d)", &i_x, &i_y, &i_z );
307 return ( i_x - p_intf->p_sys->i_calibrate ) * 10;
310 case UNIMOTION_SENSOR:
311 if( read_sms_raw( p_intf->p_sys->unimotion_hw, &i_x, &i_y, &i_z ) )
313 double d_norm = sqrt( i_x*i_x+i_z*i_z );
316 double d_x = i_x / d_norm;
318 return -asin(d_x)*3600/3.141;
320 return 3600 + asin(d_x)*3600/3.141;