1 /*****************************************************************************
2 * motiondetect.c : Motion detect video effect plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
7 * Authors: Jérôme Decoodt <djc@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
32 #include <vlc_interface.h>
33 #include <vlc_playlist.h>
35 #include "filter_common.h"
36 #include <vlc_charset.h>
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Create ( vlc_object_t * );
42 static void Destroy ( vlc_object_t * );
44 static int Init ( vout_thread_t * );
45 static void End ( vout_thread_t * );
46 static void Render ( vout_thread_t *, picture_t * );
47 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
48 picture_t *p_outpic );
50 static int SendEvents ( vlc_object_t *, char const *,
51 vlc_value_t, vlc_value_t, void * );
53 /*****************************************************************************
55 *****************************************************************************/
56 #define DESC_TEXT N_("Description file")
57 #define DESC_LONGTEXT N_("A file containing a simple playlist")
58 #define HISTORY_TEXT N_("History parameter")
59 /// \bug [String] typo
60 #define HISTORY_LONGTEXT N_("The umber of frames used for detection.")
63 set_description( _("Motion detect video filter") );
64 set_shortname( _( "Motion detect" ));
65 set_category( CAT_VIDEO );
66 set_subcategory( SUBCAT_VIDEO_VFILTER );
67 set_capability( "video filter", 0 );
69 add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
70 HISTORY_LONGTEXT, VLC_FALSE );
71 add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
72 DESC_LONGTEXT, VLC_FALSE );
74 set_callbacks( Create, Destroy );
77 /*****************************************************************************
78 * vout_sys_t: Motion detect video output method descriptor
79 *****************************************************************************
80 * This structure is part of the video output thread descriptor.
81 * It describes the Motion detect specific properties of an output thread.
82 *****************************************************************************/
89 int i_downspeed, i_upspeed;
95 vout_thread_t *p_vout;
96 playlist_t *p_playlist;
105 /*****************************************************************************
106 * Control: control facility for the vout (forwards to child vout)
107 *****************************************************************************/
108 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
110 return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
113 /*****************************************************************************
114 * Create: allocates Distort video thread output method
115 *****************************************************************************
116 * This function allocates and initializes a Distort vout method.
117 *****************************************************************************/
118 static int Create( vlc_object_t *p_this )
120 vout_thread_t *p_vout = (vout_thread_t *)p_this;
121 char *psz_descfilename;
123 int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
127 /* Allocate structure */
128 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
129 if( p_vout->p_sys == NULL )
131 msg_Err( p_vout, "out of memory" );
135 p_vout->pf_init = Init;
136 p_vout->pf_end = End;
137 p_vout->pf_manage = NULL;
138 p_vout->pf_render = Render;
139 p_vout->pf_display = NULL;
140 p_vout->pf_control = Control;
142 memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
144 p_vout->p_sys->i_history = config_GetInt( p_vout,
145 "motiondetect-history" );
147 if( !(psz_descfilename = config_GetPsz( p_vout,
148 "motiondetect-description" ) ) )
150 free( p_vout->p_sys );
154 p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
156 if( !p_vout->p_sys->p_playlist )
158 msg_Err( p_vout, "playlist not found" );
159 free( p_vout->p_sys );
163 /* Parse description file and allocate areas */
164 p_file = utf8_fopen( psz_descfilename, "r" );
167 msg_Err( p_this, "Failed to open description file %s",
169 free( psz_descfilename );
170 free( p_vout->p_sys );
173 p_vout->p_sys->i_areas = 0;
174 while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
175 &x1, &y1, &x2, &y2, &i_level,
176 &i_downspeed, &i_upspeed ) == 7 )
178 for( i = 0 ; i < 255 ; i++ )
180 fread( buffer + i, 1, 1, p_file );
181 if( *( buffer + i ) == '\n' )
185 p_vout->p_sys->i_areas++;
186 p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
187 p_vout->p_sys->i_areas *
189 if( !p_vout->p_sys->pp_areas )
190 /*FIXME: clean this... */
192 p_area = malloc( sizeof( area_t ) );
200 p_area->i_matches = 0;
201 p_area->i_level = i_level;
202 p_area->i_downspeed = i_downspeed;
203 p_area->i_upspeed = i_upspeed;
205 p_area->psz_mrl = strdup(buffer);
206 p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
212 /*****************************************************************************
213 * Init: initialize Motion detect video thread output method
214 *****************************************************************************/
215 static int Init( vout_thread_t *p_vout )
219 video_format_t fmt = {0};
221 I_OUTPUTPICTURES = 0;
223 /* Initialize the output structure */
224 p_vout->output.i_chroma = p_vout->render.i_chroma;
225 p_vout->output.i_width = p_vout->render.i_width;
226 p_vout->output.i_height = p_vout->render.i_height;
227 p_vout->output.i_aspect = p_vout->render.i_aspect;
228 p_vout->fmt_out = p_vout->fmt_in;
229 fmt = p_vout->fmt_out;
231 /* Try to open the real video output */
232 msg_Dbg( p_vout, "spawning the real video output" );
234 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
236 /* Everything failed */
237 if( p_vout->p_sys->p_vout == NULL )
239 msg_Err( p_vout, "cannot open vout, aborting" );
243 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
245 ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
247 ADD_PARENT_CALLBACKS( SendEventsToChild );
252 /*****************************************************************************
253 * End: terminate Motion detect video thread output method
254 *****************************************************************************/
255 static void End( vout_thread_t *p_vout )
259 /* Free the fake output buffers we allocated */
260 for( i_index = I_OUTPUTPICTURES ; i_index ; )
263 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
267 /*****************************************************************************
268 * Destroy: destroy Motion detect video thread output method
269 *****************************************************************************
270 * Terminate an output method created by DistortCreateOutputMethod
271 *****************************************************************************/
272 static void Destroy( vlc_object_t *p_this )
274 vout_thread_t *p_vout = (vout_thread_t *)p_this;
277 if( p_vout->p_sys->p_vout )
279 DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
280 vlc_object_detach( p_vout->p_sys->p_vout );
281 vout_Destroy( p_vout->p_sys->p_vout );
284 DEL_PARENT_CALLBACKS( SendEventsToChild );
286 for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
288 free( p_vout->p_sys->pp_areas[i]->psz_mrl );
289 free( p_vout->p_sys->pp_areas[i] );
292 free( p_vout->p_sys->pp_areas );
293 free( p_vout->p_sys );
296 /*****************************************************************************
297 * Render: displays previously rendered output
298 *****************************************************************************
299 * This function send the currently rendered image to Distort image, waits
300 * until it is displayed and switch the two rendering buffers, preparing next
302 *****************************************************************************/
303 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
307 /* This is a new frame. Get a structure from the video_output. */
308 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
311 if( p_vout->b_die || p_vout->b_error )
315 msleep( VOUT_OUTMEM_SLEEP );
318 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
320 MotionDetect( p_vout, p_pic, p_outpic );
322 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
325 /*****************************************************************************
326 * MotionDetect: calculates new matches
327 *****************************************************************************/
328 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
329 picture_t *p_outpic )
331 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
333 int i_index, i_index_col, i_area;
334 for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
336 int i_line, i_num_lines, i_offset, i_size, i_diff;
337 uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
339 p_in = p_inpic->p[i_index].p_pixels;
340 p_out = p_outpic->p[i_index].p_pixels;
342 i_num_lines = p_inpic->p[i_index].i_visible_lines;
343 i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
345 p_vout->p_libvlc->pf_memcpy( p_out, p_in, i_size );
349 p_buffer = p_vout->p_sys->p_bufferY;
351 if( p_buffer == NULL)
353 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
354 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
356 p_vout->p_sys->p_bufferY = p_buffer;
357 p_vout->p_sys->i_stack = 0;
360 i_offset = i_size * p_vout->p_sys->i_stack;
361 p_last_in = p_buffer + i_offset;
362 for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
364 int i_tmp = 0, i_nb_pixels;
365 p_last_in = p_buffer + i_offset;
366 p_in = p_inpic->p[i_index].p_pixels;
367 p_out = p_outpic->p[i_index].p_pixels;
368 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
369 ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
371 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
372 pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
373 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
374 pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
376 for( i_line = pp_curent_area->i_y1 ;
377 i_line < pp_curent_area->i_y2 ; i_line++ )
379 for( i_index_col = pp_curent_area->i_x1 ;
380 i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
382 i_diff = (*(p_last_in + i_index_col +
383 i_line * p_inpic->p[i_index].i_pitch)
384 - *(p_in + i_index_col +
385 i_line * p_inpic->p[i_index].i_pitch));
389 if( i_diff > pp_curent_area->i_level )
390 i_tmp += pp_curent_area->i_upspeed;
392 *( p_out + i_index_col + i_line *
393 p_inpic->p[i_index].i_pitch ) =
394 pp_curent_area->i_matches;
397 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
398 ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
399 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
400 pp_curent_area->i_downspeed;
401 if( pp_curent_area->i_matches < 0)
402 pp_curent_area->i_matches = 0;
403 if( pp_curent_area->i_matches > 255)
405 playlist_item_t *p_item = playlist_ItemNew( p_vout,
406 (const char*)pp_curent_area->psz_mrl,
407 pp_curent_area->psz_mrl );
408 msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
409 pp_curent_area->psz_mrl );
410 playlist_Control( p_vout->p_sys->p_playlist,
411 PLAYLIST_VIEWPLAY, VLC_TRUE, NULL, p_item );
412 pp_curent_area->i_matches = 0;
415 p_last_in = p_buffer + i_offset;
416 p_in = p_inpic->p[i_index].p_pixels;
417 p_out = p_outpic->p[i_index].p_pixels;
419 p_vout->p_libvlc->pf_memcpy( p_last_in, p_in, i_size );
425 p_vout->p_sys->i_stack++;
426 if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
427 p_vout->p_sys->i_stack = 0;
428 #undef pp_curent_area
431 /*****************************************************************************
432 * SendEvents: forward mouse and keyboard events to the parent p_vout
433 *****************************************************************************/
434 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
435 vlc_value_t oldval, vlc_value_t newval, void *p_data )
437 var_Set( (vlc_object_t *)p_data, psz_var, newval );
442 /*****************************************************************************
443 * SendEventsToChild: forward events to the child/children vout
444 *****************************************************************************/
445 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
446 vlc_value_t oldval, vlc_value_t newval, void *p_data )
448 vout_thread_t *p_vout = (vout_thread_t *)p_this;
449 var_Set( p_vout->p_sys->p_vout, psz_var, newval );