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., 59 Temple Place - Suite 330, Boston, MA 02111, 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;
226 fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
227 fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
228 fmt.i_x_offset = fmt.i_y_offset = 0;
229 fmt.i_chroma = p_vout->render.i_chroma;
230 fmt.i_aspect = p_vout->render.i_aspect;
231 fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
232 fmt.i_sar_den = VOUT_ASPECT_FACTOR;
234 /* Try to open the real video output */
235 msg_Dbg( p_vout, "spawning the real video output" );
237 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
239 /* Everything failed */
240 if( p_vout->p_sys->p_vout == NULL )
242 msg_Err( p_vout, "cannot open vout, aborting" );
246 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
248 ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
250 ADD_PARENT_CALLBACKS( SendEventsToChild );
255 /*****************************************************************************
256 * End: terminate Motion detect video thread output method
257 *****************************************************************************/
258 static void End( vout_thread_t *p_vout )
262 /* Free the fake output buffers we allocated */
263 for( i_index = I_OUTPUTPICTURES ; i_index ; )
266 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
270 /*****************************************************************************
271 * Destroy: destroy Motion detect video thread output method
272 *****************************************************************************
273 * Terminate an output method created by DistortCreateOutputMethod
274 *****************************************************************************/
275 static void Destroy( vlc_object_t *p_this )
277 vout_thread_t *p_vout = (vout_thread_t *)p_this;
280 if( p_vout->p_sys->p_vout )
282 DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
283 vlc_object_detach( p_vout->p_sys->p_vout );
284 vout_Destroy( p_vout->p_sys->p_vout );
287 DEL_PARENT_CALLBACKS( SendEventsToChild );
289 for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
291 free( p_vout->p_sys->pp_areas[i]->psz_mrl );
292 free( p_vout->p_sys->pp_areas[i] );
295 free( p_vout->p_sys->pp_areas );
296 free( p_vout->p_sys );
299 /*****************************************************************************
300 * Render: displays previously rendered output
301 *****************************************************************************
302 * This function send the currently rendered image to Distort image, waits
303 * until it is displayed and switch the two rendering buffers, preparing next
305 *****************************************************************************/
306 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
310 /* This is a new frame. Get a structure from the video_output. */
311 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
314 if( p_vout->b_die || p_vout->b_error )
318 msleep( VOUT_OUTMEM_SLEEP );
321 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
323 MotionDetect( p_vout, p_pic, p_outpic );
325 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
328 /*****************************************************************************
329 * MotionDetect: calculates new matches
330 *****************************************************************************/
331 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
332 picture_t *p_outpic )
334 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
336 int i_index, i_index_col, i_area;
337 for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
339 int i_line, i_num_lines, i_offset, i_size, i_diff;
340 uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
342 p_in = p_inpic->p[i_index].p_pixels;
343 p_out = p_outpic->p[i_index].p_pixels;
345 i_num_lines = p_inpic->p[i_index].i_visible_lines;
346 i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
348 p_vout->p_vlc->pf_memcpy( p_out, p_in, i_size );
352 p_buffer = p_vout->p_sys->p_bufferY;
354 if( p_buffer == NULL)
356 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
357 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
359 p_vout->p_sys->p_bufferY = p_buffer;
360 p_vout->p_sys->i_stack = 0;
363 i_offset = i_size * p_vout->p_sys->i_stack;
364 p_last_in = p_buffer + i_offset;
365 for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
367 int i_tmp = 0, i_nb_pixels;
368 p_last_in = p_buffer + i_offset;
369 p_in = p_inpic->p[i_index].p_pixels;
370 p_out = p_outpic->p[i_index].p_pixels;
371 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
372 ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
374 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
375 pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
376 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
377 pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
379 for( i_line = pp_curent_area->i_y1 ;
380 i_line < pp_curent_area->i_y2 ; i_line++ )
382 for( i_index_col = pp_curent_area->i_x1 ;
383 i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
385 i_diff = (*(p_last_in + i_index_col +
386 i_line * p_inpic->p[i_index].i_pitch)
387 - *(p_in + i_index_col +
388 i_line * p_inpic->p[i_index].i_pitch));
392 if( i_diff > pp_curent_area->i_level )
393 i_tmp += pp_curent_area->i_upspeed;
395 *( p_out + i_index_col + i_line *
396 p_inpic->p[i_index].i_pitch ) =
397 pp_curent_area->i_matches;
400 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
401 ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
402 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
403 pp_curent_area->i_downspeed;
404 if( pp_curent_area->i_matches < 0)
405 pp_curent_area->i_matches = 0;
406 if( pp_curent_area->i_matches > 255)
408 playlist_item_t *p_item = playlist_ItemNew( p_vout,
409 (const char*)pp_curent_area->psz_mrl,
410 pp_curent_area->psz_mrl );
411 msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
412 pp_curent_area->psz_mrl );
413 playlist_Control( p_vout->p_sys->p_playlist,
414 PLAYLIST_ITEMPLAY, p_item );
415 pp_curent_area->i_matches = 0;
418 p_last_in = p_buffer + i_offset;
419 p_in = p_inpic->p[i_index].p_pixels;
420 p_out = p_outpic->p[i_index].p_pixels;
422 p_vout->p_vlc->pf_memcpy( p_last_in, p_in, i_size );
428 p_vout->p_sys->i_stack++;
429 if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
430 p_vout->p_sys->i_stack = 0;
431 #undef pp_curent_area
434 /*****************************************************************************
435 * SendEvents: forward mouse and keyboard events to the parent p_vout
436 *****************************************************************************/
437 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
438 vlc_value_t oldval, vlc_value_t newval, void *p_data )
440 var_Set( (vlc_object_t *)p_data, psz_var, newval );
445 /*****************************************************************************
446 * SendEventsToChild: forward events to the child/children vout
447 *****************************************************************************/
448 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
449 vlc_value_t oldval, vlc_value_t newval, void *p_data )
451 vout_thread_t *p_vout = (vout_thread_t *)p_this;
452 var_Set( p_vout->p_sys->p_vout, psz_var, newval );