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"
37 /*****************************************************************************
39 *****************************************************************************/
40 static int Create ( vlc_object_t * );
41 static void Destroy ( vlc_object_t * );
43 static int Init ( vout_thread_t * );
44 static void End ( vout_thread_t * );
45 static void Render ( vout_thread_t *, picture_t * );
46 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
47 picture_t *p_outpic );
49 static int SendEvents ( vlc_object_t *, char const *,
50 vlc_value_t, vlc_value_t, void * );
52 /*****************************************************************************
54 *****************************************************************************/
55 #define DESC_TEXT N_("Description file")
56 #define DESC_LONGTEXT N_("A file containing a simple playlist")
57 #define HISTORY_TEXT N_("History parameter")
58 /// \bug [String] typo
59 #define HISTORY_LONGTEXT N_("The umber of frames used for detection.")
62 set_description( _("Motion detect video filter") );
63 set_shortname( _( "Motion detect" ));
64 set_category( CAT_VIDEO );
65 set_subcategory( SUBCAT_VIDEO_VFILTER );
66 set_capability( "video filter", 0 );
68 add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
69 HISTORY_LONGTEXT, VLC_FALSE );
70 add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
71 DESC_LONGTEXT, VLC_FALSE );
73 set_callbacks( Create, Destroy );
76 /*****************************************************************************
77 * vout_sys_t: Motion detect video output method descriptor
78 *****************************************************************************
79 * This structure is part of the video output thread descriptor.
80 * It describes the Motion detect specific properties of an output thread.
81 *****************************************************************************/
88 int i_downspeed, i_upspeed;
94 vout_thread_t *p_vout;
95 playlist_t *p_playlist;
104 /*****************************************************************************
105 * Control: control facility for the vout (forwards to child vout)
106 *****************************************************************************/
107 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
109 return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
112 /*****************************************************************************
113 * Create: allocates Distort video thread output method
114 *****************************************************************************
115 * This function allocates and initializes a Distort vout method.
116 *****************************************************************************/
117 static int Create( vlc_object_t *p_this )
119 vout_thread_t *p_vout = (vout_thread_t *)p_this;
120 char *psz_descfilename;
122 int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
126 /* Allocate structure */
127 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
128 if( p_vout->p_sys == NULL )
130 msg_Err( p_vout, "out of memory" );
134 p_vout->pf_init = Init;
135 p_vout->pf_end = End;
136 p_vout->pf_manage = NULL;
137 p_vout->pf_render = Render;
138 p_vout->pf_display = NULL;
139 p_vout->pf_control = Control;
141 memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
143 p_vout->p_sys->i_history = config_GetInt( p_vout,
144 "motiondetect-history" );
146 if( !(psz_descfilename = config_GetPsz( p_vout,
147 "motiondetect-description" ) ) )
149 free( p_vout->p_sys );
153 p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
155 if( !p_vout->p_sys->p_playlist )
157 msg_Err( p_vout, "playlist not found" );
158 free( p_vout->p_sys );
162 /* Parse description file and allocate areas */
163 p_file = utf8_fopen( psz_descfilename, "r" );
166 msg_Err( p_this, "Failed to open description file %s",
168 free( psz_descfilename );
169 free( p_vout->p_sys );
172 p_vout->p_sys->i_areas = 0;
173 while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
174 &x1, &y1, &x2, &y2, &i_level,
175 &i_downspeed, &i_upspeed ) == 7 )
177 for( i = 0 ; i < 255 ; i++ )
179 fread( buffer + i, 1, 1, p_file );
180 if( *( buffer + i ) == '\n' )
184 p_vout->p_sys->i_areas++;
185 p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
186 p_vout->p_sys->i_areas *
188 if( !p_vout->p_sys->pp_areas )
189 /*FIXME: clean this... */
191 p_area = malloc( sizeof( area_t ) );
199 p_area->i_matches = 0;
200 p_area->i_level = i_level;
201 p_area->i_downspeed = i_downspeed;
202 p_area->i_upspeed = i_upspeed;
204 p_area->psz_mrl = strdup(buffer);
205 p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
211 /*****************************************************************************
212 * Init: initialize Motion detect video thread output method
213 *****************************************************************************/
214 static int Init( vout_thread_t *p_vout )
218 video_format_t fmt = {0};
220 I_OUTPUTPICTURES = 0;
222 /* Initialize the output structure */
223 p_vout->output.i_chroma = p_vout->render.i_chroma;
224 p_vout->output.i_width = p_vout->render.i_width;
225 p_vout->output.i_height = p_vout->render.i_height;
226 p_vout->output.i_aspect = p_vout->render.i_aspect;
227 p_vout->fmt_out = p_vout->fmt_in;
228 fmt = p_vout->fmt_out;
230 /* Try to open the real video output */
231 msg_Dbg( p_vout, "spawning the real video output" );
233 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
235 /* Everything failed */
236 if( p_vout->p_sys->p_vout == NULL )
238 msg_Err( p_vout, "cannot open vout, aborting" );
242 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
244 ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
246 ADD_PARENT_CALLBACKS( SendEventsToChild );
251 /*****************************************************************************
252 * End: terminate Motion detect video thread output method
253 *****************************************************************************/
254 static void End( vout_thread_t *p_vout )
258 /* Free the fake output buffers we allocated */
259 for( i_index = I_OUTPUTPICTURES ; i_index ; )
262 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
266 /*****************************************************************************
267 * Destroy: destroy Motion detect video thread output method
268 *****************************************************************************
269 * Terminate an output method created by DistortCreateOutputMethod
270 *****************************************************************************/
271 static void Destroy( vlc_object_t *p_this )
273 vout_thread_t *p_vout = (vout_thread_t *)p_this;
276 if( p_vout->p_sys->p_vout )
278 DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
279 vlc_object_detach( p_vout->p_sys->p_vout );
280 vout_Destroy( p_vout->p_sys->p_vout );
283 DEL_PARENT_CALLBACKS( SendEventsToChild );
285 for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
287 free( p_vout->p_sys->pp_areas[i]->psz_mrl );
288 free( p_vout->p_sys->pp_areas[i] );
291 free( p_vout->p_sys->pp_areas );
292 free( p_vout->p_sys );
295 /*****************************************************************************
296 * Render: displays previously rendered output
297 *****************************************************************************
298 * This function send the currently rendered image to Distort image, waits
299 * until it is displayed and switch the two rendering buffers, preparing next
301 *****************************************************************************/
302 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
306 /* This is a new frame. Get a structure from the video_output. */
307 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
310 if( p_vout->b_die || p_vout->b_error )
314 msleep( VOUT_OUTMEM_SLEEP );
317 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
319 MotionDetect( p_vout, p_pic, p_outpic );
321 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
324 /*****************************************************************************
325 * MotionDetect: calculates new matches
326 *****************************************************************************/
327 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
328 picture_t *p_outpic )
330 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
332 int i_index, i_index_col, i_area;
333 for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
335 int i_line, i_num_lines, i_offset, i_size, i_diff;
336 uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
338 p_in = p_inpic->p[i_index].p_pixels;
339 p_out = p_outpic->p[i_index].p_pixels;
341 i_num_lines = p_inpic->p[i_index].i_visible_lines;
342 i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
344 p_vout->p_libvlc->pf_memcpy( p_out, p_in, i_size );
348 p_buffer = p_vout->p_sys->p_bufferY;
350 if( p_buffer == NULL)
352 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
353 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
355 p_vout->p_sys->p_bufferY = p_buffer;
356 p_vout->p_sys->i_stack = 0;
359 i_offset = i_size * p_vout->p_sys->i_stack;
360 p_last_in = p_buffer + i_offset;
361 for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
363 int i_tmp = 0, i_nb_pixels;
364 p_last_in = p_buffer + i_offset;
365 p_in = p_inpic->p[i_index].p_pixels;
366 p_out = p_outpic->p[i_index].p_pixels;
367 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
368 ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
370 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
371 pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
372 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
373 pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
375 for( i_line = pp_curent_area->i_y1 ;
376 i_line < pp_curent_area->i_y2 ; i_line++ )
378 for( i_index_col = pp_curent_area->i_x1 ;
379 i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
381 i_diff = (*(p_last_in + i_index_col +
382 i_line * p_inpic->p[i_index].i_pitch)
383 - *(p_in + i_index_col +
384 i_line * p_inpic->p[i_index].i_pitch));
388 if( i_diff > pp_curent_area->i_level )
389 i_tmp += pp_curent_area->i_upspeed;
391 *( p_out + i_index_col + i_line *
392 p_inpic->p[i_index].i_pitch ) =
393 pp_curent_area->i_matches;
396 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
397 ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
398 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
399 pp_curent_area->i_downspeed;
400 if( pp_curent_area->i_matches < 0)
401 pp_curent_area->i_matches = 0;
402 if( pp_curent_area->i_matches > 255)
404 playlist_item_t *p_item = playlist_ItemNew( p_vout,
405 (const char*)pp_curent_area->psz_mrl,
406 pp_curent_area->psz_mrl );
407 msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
408 pp_curent_area->psz_mrl );
409 playlist_Control( p_vout->p_sys->p_playlist,
410 PLAYLIST_VIEWPLAY, NULL, p_item );
411 pp_curent_area->i_matches = 0;
414 p_last_in = p_buffer + i_offset;
415 p_in = p_inpic->p[i_index].p_pixels;
416 p_out = p_outpic->p[i_index].p_pixels;
418 p_vout->p_libvlc->pf_memcpy( p_last_in, p_in, i_size );
424 p_vout->p_sys->i_stack++;
425 if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
426 p_vout->p_sys->i_stack = 0;
427 #undef pp_curent_area
430 /*****************************************************************************
431 * SendEvents: forward mouse and keyboard events to the parent p_vout
432 *****************************************************************************/
433 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
434 vlc_value_t oldval, vlc_value_t newval, void *p_data )
436 var_Set( (vlc_object_t *)p_data, psz_var, newval );
441 /*****************************************************************************
442 * SendEventsToChild: forward events to the child/children vout
443 *****************************************************************************/
444 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
445 vlc_value_t oldval, vlc_value_t newval, void *p_data )
447 vout_thread_t *p_vout = (vout_thread_t *)p_this;
448 var_Set( p_vout->p_sys->p_vout, psz_var, newval );