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() */
34 #include "filter_common.h"
36 /*****************************************************************************
38 *****************************************************************************/
39 static int Create ( vlc_object_t * );
40 static void Destroy ( vlc_object_t * );
42 static int Init ( vout_thread_t * );
43 static void End ( vout_thread_t * );
44 static void Render ( vout_thread_t *, picture_t * );
45 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
46 picture_t *p_outpic );
48 static int SendEvents ( vlc_object_t *, char const *,
49 vlc_value_t, vlc_value_t, void * );
51 /*****************************************************************************
53 *****************************************************************************/
54 #define DESC_TEXT N_("Description file")
55 #define DESC_LONGTEXT N_("Description file, file containing simple playlist")
56 #define HISTORY_TEXT N_("History parameter")
57 #define HISTORY_LONGTEXT N_("History parameter, number of frames used for detection")
60 set_description( _("Motion detect video filter") );
61 set_shortname( N_( "Motion detect" ));
62 set_category( CAT_VIDEO );
63 set_subcategory( SUBCAT_VIDEO_VFILTER );
64 set_capability( "video filter", 0 );
66 add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
67 HISTORY_LONGTEXT, VLC_FALSE );
68 add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
69 DESC_LONGTEXT, VLC_FALSE );
71 set_callbacks( Create, Destroy );
74 /*****************************************************************************
75 * vout_sys_t: Motion detect video output method descriptor
76 *****************************************************************************
77 * This structure is part of the video output thread descriptor.
78 * It describes the Motion detect specific properties of an output thread.
79 *****************************************************************************/
86 int i_downspeed, i_upspeed;
92 vout_thread_t *p_vout;
93 playlist_t *p_playlist;
102 /*****************************************************************************
103 * Control: control facility for the vout (forwards to child vout)
104 *****************************************************************************/
105 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
107 return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
110 /*****************************************************************************
111 * Create: allocates Distort video thread output method
112 *****************************************************************************
113 * This function allocates and initializes a Distort vout method.
114 *****************************************************************************/
115 static int Create( vlc_object_t *p_this )
117 vout_thread_t *p_vout = (vout_thread_t *)p_this;
118 char *psz_descfilename;
120 int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
124 /* Allocate structure */
125 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
126 if( p_vout->p_sys == NULL )
128 msg_Err( p_vout, "out of memory" );
132 p_vout->pf_init = Init;
133 p_vout->pf_end = End;
134 p_vout->pf_manage = NULL;
135 p_vout->pf_render = Render;
136 p_vout->pf_display = NULL;
137 p_vout->pf_control = Control;
139 memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
141 p_vout->p_sys->i_history = config_GetInt( p_vout,
142 "motiondetect-history" );
144 if( !(psz_descfilename = config_GetPsz( p_vout,
145 "motiondetect-description" ) ) )
147 free( p_vout->p_sys );
151 p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
153 if( !p_vout->p_sys->p_playlist )
155 msg_Err( p_vout, "playlist not found" );
156 free( p_vout->p_sys );
160 /* Parse description file and allocate areas */
161 p_file = fopen( psz_descfilename, "r" );
164 msg_Err( p_this, "Failed to open descritpion file %s",
166 free( psz_descfilename );
167 free( p_vout->p_sys );
170 p_vout->p_sys->i_areas = 0;
171 while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
172 &x1, &y1, &x2, &y2, &i_level,
173 &i_downspeed, &i_upspeed ) == 7 )
175 for( i = 0 ; i < 255 ; i++ )
177 fread( buffer + i, 1, 1, p_file );
178 if( *( buffer + i ) == '\n' )
182 p_vout->p_sys->i_areas++;
183 p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
184 p_vout->p_sys->i_areas *
186 if( !p_vout->p_sys->pp_areas )
187 /*FIXME: clean this... */
189 p_area = malloc( sizeof( area_t ) );
197 p_area->i_matches = 0;
198 p_area->i_level = i_level;
199 p_area->i_downspeed = i_downspeed;
200 p_area->i_upspeed = i_upspeed;
202 p_area->psz_mrl = strdup(buffer);
203 p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
209 /*****************************************************************************
210 * Init: initialize Motion detect video thread output method
211 *****************************************************************************/
212 static int Init( vout_thread_t *p_vout )
216 video_format_t fmt = {0};
218 I_OUTPUTPICTURES = 0;
220 /* Initialize the output structure */
221 p_vout->output.i_chroma = p_vout->render.i_chroma;
222 p_vout->output.i_width = p_vout->render.i_width;
223 p_vout->output.i_height = p_vout->render.i_height;
224 p_vout->output.i_aspect = p_vout->render.i_aspect;
225 p_vout->fmt_out = p_vout->fmt_in;
226 fmt = p_vout->fmt_out;
228 /* Try to open the real video output */
229 msg_Dbg( p_vout, "spawning the real video output" );
231 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
233 /* Everything failed */
234 if( p_vout->p_sys->p_vout == NULL )
236 msg_Err( p_vout, "cannot open vout, aborting" );
240 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
242 ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
244 ADD_PARENT_CALLBACKS( SendEventsToChild );
249 /*****************************************************************************
250 * End: terminate Motion detect video thread output method
251 *****************************************************************************/
252 static void End( vout_thread_t *p_vout )
256 /* Free the fake output buffers we allocated */
257 for( i_index = I_OUTPUTPICTURES ; i_index ; )
260 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
264 /*****************************************************************************
265 * Destroy: destroy Motion detect video thread output method
266 *****************************************************************************
267 * Terminate an output method created by DistortCreateOutputMethod
268 *****************************************************************************/
269 static void Destroy( vlc_object_t *p_this )
271 vout_thread_t *p_vout = (vout_thread_t *)p_this;
274 if( p_vout->p_sys->p_vout )
276 DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
277 vlc_object_detach( p_vout->p_sys->p_vout );
278 vout_Destroy( p_vout->p_sys->p_vout );
281 DEL_PARENT_CALLBACKS( SendEventsToChild );
283 for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
285 free( p_vout->p_sys->pp_areas[i]->psz_mrl );
286 free( p_vout->p_sys->pp_areas[i] );
289 free( p_vout->p_sys->pp_areas );
290 free( p_vout->p_sys );
293 /*****************************************************************************
294 * Render: displays previously rendered output
295 *****************************************************************************
296 * This function send the currently rendered image to Distort image, waits
297 * until it is displayed and switch the two rendering buffers, preparing next
299 *****************************************************************************/
300 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
304 /* This is a new frame. Get a structure from the video_output. */
305 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
308 if( p_vout->b_die || p_vout->b_error )
312 msleep( VOUT_OUTMEM_SLEEP );
315 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
317 MotionDetect( p_vout, p_pic, p_outpic );
319 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
322 /*****************************************************************************
323 * MotionDetect: calculates new matches
324 *****************************************************************************/
325 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
326 picture_t *p_outpic )
328 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
330 int i_index, i_index_col, i_area;
331 for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
333 int i_line, i_num_lines, i_offset, i_size, i_diff;
334 uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
336 p_in = p_inpic->p[i_index].p_pixels;
337 p_out = p_outpic->p[i_index].p_pixels;
339 i_num_lines = p_inpic->p[i_index].i_visible_lines;
340 i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
342 p_vout->p_vlc->pf_memcpy( p_out, p_in, i_size );
346 p_buffer = p_vout->p_sys->p_bufferY;
348 if( p_buffer == NULL)
350 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
351 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
353 p_vout->p_sys->p_bufferY = p_buffer;
354 p_vout->p_sys->i_stack = 0;
357 i_offset = i_size * p_vout->p_sys->i_stack;
358 p_last_in = p_buffer + i_offset;
359 for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
361 int i_tmp = 0, i_nb_pixels;
362 p_last_in = p_buffer + i_offset;
363 p_in = p_inpic->p[i_index].p_pixels;
364 p_out = p_outpic->p[i_index].p_pixels;
365 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
366 ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
368 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
369 pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
370 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
371 pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
373 for( i_line = pp_curent_area->i_y1 ;
374 i_line < pp_curent_area->i_y2 ; i_line++ )
376 for( i_index_col = pp_curent_area->i_x1 ;
377 i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
379 i_diff = (*(p_last_in + i_index_col +
380 i_line * p_inpic->p[i_index].i_pitch)
381 - *(p_in + i_index_col +
382 i_line * p_inpic->p[i_index].i_pitch));
386 if( i_diff > pp_curent_area->i_level )
387 i_tmp += pp_curent_area->i_upspeed;
389 *( p_out + i_index_col + i_line *
390 p_inpic->p[i_index].i_pitch ) =
391 pp_curent_area->i_matches;
394 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
395 ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
396 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
397 pp_curent_area->i_downspeed;
398 if( pp_curent_area->i_matches < 0)
399 pp_curent_area->i_matches = 0;
400 if( pp_curent_area->i_matches > 255)
402 playlist_item_t *p_item = playlist_ItemNew( p_vout,
403 (const char*)pp_curent_area->psz_mrl,
404 pp_curent_area->psz_mrl );
405 msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
406 pp_curent_area->psz_mrl );
407 playlist_Control( p_vout->p_sys->p_playlist,
408 PLAYLIST_ITEMPLAY, p_item );
409 pp_curent_area->i_matches = 0;
412 p_last_in = p_buffer + i_offset;
413 p_in = p_inpic->p[i_index].p_pixels;
414 p_out = p_outpic->p[i_index].p_pixels;
416 p_vout->p_vlc->pf_memcpy( p_last_in, p_in, i_size );
422 p_vout->p_sys->i_stack++;
423 if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
424 p_vout->p_sys->i_stack = 0;
425 #undef pp_curent_area
428 /*****************************************************************************
429 * SendEvents: forward mouse and keyboard events to the parent p_vout
430 *****************************************************************************/
431 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
432 vlc_value_t oldval, vlc_value_t newval, void *p_data )
434 var_Set( (vlc_object_t *)p_data, psz_var, newval );
439 /*****************************************************************************
440 * SendEventsToChild: forward events to the child/children vout
441 *****************************************************************************/
442 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
443 vlc_value_t oldval, vlc_value_t newval, void *p_data )
445 vout_thread_t *p_vout = (vout_thread_t *)p_this;
446 var_Set( p_vout->p_sys->p_vout, psz_var, newval );