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_plugin.h>
36 #include <vlc_interface.h>
44 #include "unimotion.h"
47 /*****************************************************************************
48 * intf_sys_t: description and status of interface
49 *****************************************************************************/
52 enum { NO_SENSOR, HDAPS_SENSOR, AMS_SENSOR, UNIMOTION_SENSOR } sensor;
54 enum sms_hardware unimotion_hw;
61 /*****************************************************************************
63 *****************************************************************************/
64 static int Open ( vlc_object_t * );
65 static void Close ( vlc_object_t * );
67 static void RunIntf( intf_thread_t *p_intf );
68 static int GetOrientation( intf_thread_t *p_intf );
70 #define USE_ROTATE_TEXT N_("Use the rotate video filter instead of transform")
72 /*****************************************************************************
74 *****************************************************************************/
76 set_shortname( _("motion"));
77 set_category( CAT_INTERFACE );
78 set_description( _("motion control interface") );
80 add_bool( "motion-use-rotate", 0, NULL,
81 USE_ROTATE_TEXT, USE_ROTATE_TEXT, false );
83 set_capability( "interface", 0 );
84 set_callbacks( Open, Close );
87 /*****************************************************************************
88 * OpenIntf: initialise interface
89 *****************************************************************************/
90 int Open ( vlc_object_t *p_this )
92 intf_thread_t *p_intf = (intf_thread_t *)p_this;
96 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
97 if( p_intf->p_sys == NULL )
102 if( access( "/sys/devices/platform/hdaps/position", R_OK ) == 0 )
104 /* IBM HDAPS support */
105 f = fopen( "/sys/devices/platform/hdaps/calibrate", "r" );
109 fscanf( f, "(%d,%d)", &i_x, &i_y );
111 p_intf->p_sys->i_calibrate = i_x;
112 p_intf->p_sys->sensor = HDAPS_SENSOR;
116 p_intf->p_sys->sensor = NO_SENSOR;
119 else if( access( "/sys/devices/ams/x", R_OK ) == 0 )
121 /* Apple Motion Sensor support */
122 p_intf->p_sys->sensor = AMS_SENSOR;
125 else if( p_intf->p_sys->unimotion_hw = detect_sms() )
126 p_intf->p_sys->sensor = UNIMOTION_SENSOR;
130 /* No motion sensor support */
131 p_intf->p_sys->sensor = NO_SENSOR;
134 p_intf->pf_run = RunIntf;
136 p_intf->p_sys->b_use_rotate = config_GetInt( p_intf, "motion-use-rotate" );
141 /*****************************************************************************
142 * CloseIntf: destroy interface
143 *****************************************************************************/
144 void Close ( vlc_object_t *p_this )
146 intf_thread_t *p_intf = (intf_thread_t *)p_this;
148 free( p_intf->p_sys );
151 /*****************************************************************************
153 *****************************************************************************/
154 #define FILTER_LENGTH 16
155 #define LOW_THRESHOLD 800
156 #define HIGH_THRESHOLD 1000
157 static void RunIntf( intf_thread_t *p_intf )
159 int i_x, i_oldx = 0, i_sum = 0, i = 0;
160 int p_oldx[FILTER_LENGTH];
161 memset( p_oldx, 0, FILTER_LENGTH * sizeof( int ) );
163 while( !intf_ShouldDie( p_intf ) )
165 vout_thread_t *p_vout;
166 const char *psz_filter, *psz_type;
167 bool b_change = false;
169 /* Wait a bit, get orientation, change filter if necessary */
170 msleep( INTF_IDLE_SLEEP );
172 i_x = GetOrientation( p_intf );
173 i_sum += i_x - p_oldx[i];
175 if( i == FILTER_LENGTH ) i = 0;
176 i_x = i_sum / FILTER_LENGTH;
178 if( p_intf->p_sys->b_use_rotate )
182 /* TODO: cache object pointer */
183 vlc_object_t *p_obj =
184 vlc_object_find_name( p_intf->p_libvlc, "rotate", FIND_CHILD );
187 var_SetInteger( p_obj, "rotate-deciangle",
188 ((3600+i_x/2)%3600) );
190 vlc_object_release( p_obj );
196 if( i_x < -HIGH_THRESHOLD && i_oldx > -LOW_THRESHOLD )
199 psz_filter = "transform";
202 else if( ( i_x > -LOW_THRESHOLD && i_oldx < -HIGH_THRESHOLD )
203 || ( i_x < LOW_THRESHOLD && i_oldx > HIGH_THRESHOLD ) )
209 else if( i_x > HIGH_THRESHOLD && i_oldx < LOW_THRESHOLD )
212 psz_filter = "transform";
221 p_vout = (vout_thread_t *)
222 vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_ANYWHERE );
228 config_PutPsz( p_vout, "transform-type", psz_type );
229 var_SetString( p_vout, "vout-filter", psz_filter );
230 vlc_object_release( p_vout );
237 #undef HIGH_THRESHOLD
239 /*****************************************************************************
240 * GetOrientation: get laptop orientation, range -1800 / +1800
241 *****************************************************************************/
242 static int GetOrientation( intf_thread_t *p_intf )
249 switch( p_intf->p_sys->sensor )
252 f = fopen( "/sys/devices/platform/hdaps/position", "r" );
259 fscanf( f, "(%d,%d)", &i_x, &i_y );
262 return ( i_x - p_intf->p_sys->i_calibrate ) * 10;
265 f = fopen( "/sys/devices/ams/x", "r" );
271 fscanf( f, "%d", &i_x);
274 return - i_x * 30; /* FIXME: arbitrary */
276 case UNIMOTION_SENSOR:
277 if( read_sms_raw( p_intf->p_sys->unimotion_hw, &i_x, &i_y, &i_z ) )
279 double d_norm = sqrt( i_x*i_x+i_z*i_z );
282 double d_x = i_x / d_norm;
284 return -asin(d_x)*3600/3.141;
286 return 3600 + asin(d_x)*3600/3.141;