1 /*****************************************************************************
2 * magnify.c : Magnify/Zoom interactive effect
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea -at- videolan -dot- 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() */
35 #include "filter_common.h"
36 #include "vlc_image.h"
37 #include "vlc_input.h"
38 #include "vlc_playlist.h"
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Create ( vlc_object_t * );
44 static void Destroy ( vlc_object_t * );
46 static int Init ( vout_thread_t * );
47 static void End ( vout_thread_t * );
48 static void Render ( vout_thread_t *, picture_t * );
50 static int SendEvents ( vlc_object_t *, char const *,
51 vlc_value_t, vlc_value_t, void * );
52 static int MouseEvent ( vlc_object_t *, char const *,
53 vlc_value_t, vlc_value_t, void * );
55 /*****************************************************************************
57 *****************************************************************************/
59 set_description( _("Magnify/Zoom interactive video filter") );
60 set_shortname( N_( "Magnify" ));
61 set_capability( "video filter", 0 );
62 set_category( CAT_VIDEO );
63 set_subcategory( SUBCAT_VIDEO_VFILTER );
65 set_callbacks( Create, Destroy );
68 /*****************************************************************************
69 * vout_sys_t: Magnify video output method descriptor
70 *****************************************************************************/
73 vout_thread_t *p_vout;
75 image_handler_t *p_image;
77 int i_zoom; /* zoom level in percent */
78 int i_x, i_y; /* top left corner coordinates in original image */
80 vlc_bool_t b_visible; /* is "interface" visible ? */
83 /*****************************************************************************
84 * Control: control facility for the vout (forwards to child vout)
85 *****************************************************************************/
86 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
88 return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
91 /*****************************************************************************
92 * Create: allocates Magnify video thread output method
93 *****************************************************************************/
94 static int Create( vlc_object_t *p_this )
96 vout_thread_t *p_vout = (vout_thread_t *)p_this;
98 /* Allocate structure */
99 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
100 if( p_vout->p_sys == NULL )
102 msg_Err( p_vout, "out of memory" );
106 p_vout->p_sys->p_image = image_HandlerCreate( p_vout );
108 p_vout->pf_init = Init;
109 p_vout->pf_end = End;
110 p_vout->pf_manage = NULL;
111 p_vout->pf_render = Render;
112 p_vout->pf_display = NULL;
113 p_vout->pf_control = Control;
118 /*****************************************************************************
119 * Init: initialize Magnify video thread output method
120 *****************************************************************************/
121 static int Init( vout_thread_t *p_vout )
125 video_format_t fmt = {0};
127 I_OUTPUTPICTURES = 0;
129 /* Initialize the output structure */
130 p_vout->output.i_chroma = p_vout->render.i_chroma;
131 p_vout->output.i_width = p_vout->render.i_width;
132 p_vout->output.i_height = p_vout->render.i_height;
133 p_vout->output.i_aspect = p_vout->render.i_aspect;
135 p_vout->fmt_out = p_vout->fmt_in;
136 fmt = p_vout->fmt_out;
138 /* Try to open the real video output */
139 msg_Dbg( p_vout, "spawning the real video output" );
141 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
143 /* Everything failed */
144 if( p_vout->p_sys->p_vout == NULL )
146 msg_Err( p_vout, "cannot open vout, aborting" );
151 p_vout->p_sys->i_x = 0;
152 p_vout->p_sys->i_y = 0;
153 #define ZOOM_FACTOR 100
154 p_vout->p_sys->i_zoom = 200;
156 var_AddCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout );
157 var_AddCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout );
158 var_AddCallback( p_vout->p_sys->p_vout, "mouse-clicked",
161 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
162 ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
163 ADD_PARENT_CALLBACKS( SendEventsToChild );
168 /*****************************************************************************
169 * End: terminate Magnify video thread output method
170 *****************************************************************************/
171 static void End( vout_thread_t *p_vout )
175 /* Free the fake output buffers we allocated */
176 for( i_index = I_OUTPUTPICTURES ; i_index ; )
179 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
182 var_DelCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
183 var_DelCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
184 var_DelCallback( p_vout->p_sys->p_vout, "mouse-clicked", MouseEvent, p_vout);
187 /*****************************************************************************
188 * Destroy: destroy Magnify video thread output method
189 *****************************************************************************/
190 static void Destroy( vlc_object_t *p_this )
192 vout_thread_t *p_vout = (vout_thread_t *)p_this;
194 if( p_vout->p_sys->p_vout )
196 DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
197 vlc_object_detach( p_vout->p_sys->p_vout );
198 vout_Destroy( p_vout->p_sys->p_vout );
201 image_HandlerDelete( p_vout->p_sys->p_image );
203 DEL_PARENT_CALLBACKS( SendEventsToChild );
205 free( p_vout->p_sys );
208 /*****************************************************************************
209 * Render: displays previously rendered output
210 *****************************************************************************/
211 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
215 int o_x = p_vout->p_sys->i_x;
216 int o_y = p_vout->p_sys->i_y;
217 int o_zoom = p_vout->p_sys->i_zoom;
220 video_format_t fmt_out = {0};
221 picture_t *p_converted;
224 /* This is a new frame. Get a structure from the video_output. */
225 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
228 if( p_vout->b_die || p_vout->b_error )
232 msleep( VOUT_OUTMEM_SLEEP );
235 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
237 p_oyp = &(p_outpic->p[Y_PLANE]);
239 /* background magnified image */
240 if( o_zoom != ZOOM_FACTOR )
242 #define magnify( plane ) \
243 o_yp = o_y*p_outpic->p[plane].i_lines/p_outpic->p[Y_PLANE].i_lines; \
244 o_xp = o_x*p_outpic->p[plane].i_pitch/p_outpic->p[Y_PLANE].i_pitch; \
245 for( y=0; y<p_outpic->p[plane].i_visible_lines; y++ ) \
247 for( x=0; x<p_outpic->p[plane].i_visible_pitch; x++ ) \
249 p_outpic->p[plane].p_pixels[y*p_outpic->p[plane].i_pitch+x] = \
250 p_pic->p[plane].p_pixels[ \
251 ( o_yp + y*ZOOM_FACTOR/o_zoom )*p_outpic->p[plane].i_pitch \
252 + o_xp + x*ZOOM_FACTOR/o_zoom \
263 #define copy( plane ) \
264 memcpy( p_outpic->p[plane].p_pixels, p_pic->p[plane].p_pixels, \
265 p_outpic->p[plane].i_lines * p_outpic->p[plane].i_pitch );
272 if( p_vout->p_sys->b_visible )
274 /* image visualization */
275 fmt_out = p_vout->fmt_out;
276 fmt_out.i_width = p_vout->render.i_width/VIS_ZOOM;
277 fmt_out.i_height = p_vout->render.i_height/VIS_ZOOM;
278 p_converted = image_Convert( p_vout->p_sys->p_image, p_pic,
279 &(p_pic->format), &fmt_out );
280 #define copyimage( plane ) \
281 for( y=0; y<p_converted->p[plane].i_visible_lines; y++) \
283 memcpy( p_outpic->p[plane].p_pixels+y*p_outpic->p[plane].i_pitch, \
284 p_converted->p[plane].p_pixels+y*p_converted->p[plane].i_pitch, \
285 p_converted->p[plane].i_visible_pitch ); \
287 copyimage( Y_PLANE );
288 copyimage( U_PLANE );
289 copyimage( V_PLANE );
291 p_converted->pf_release( p_converted );
293 /* white rectangle on visualization */
294 v_w = p_oyp->i_pitch*ZOOM_FACTOR/(VIS_ZOOM*o_zoom);
295 v_h = (o_y+p_oyp->i_lines*ZOOM_FACTOR/o_zoom)/VIS_ZOOM;
297 memset( p_oyp->p_pixels
298 + o_y/VIS_ZOOM*p_oyp->i_pitch
299 + o_x/VIS_ZOOM, 0xff, v_w+1 );
301 for( y = o_y/VIS_ZOOM+1; y < v_h; y++ )
305 y*p_oyp->i_pitch+o_x/VIS_ZOOM
309 y*p_oyp->i_pitch+o_x/VIS_ZOOM + v_w
313 memset( p_oyp->p_pixels
315 + o_x/VIS_ZOOM, 0xff, v_w+1 );
318 v_h = p_oyp->i_lines/VIS_ZOOM;
325 /* print a small "VLC ZOOM" ... gruikkkkkkkkk */
326 #define DRAW(a) {int c,l=1;L a;}
328 #define X ;draw(l,c);c+=1
330 #define draw(y,x) p_oyp->p_pixels[(v_h+y)*p_oyp->i_pitch+x] = 0xff;
331 if( p_vout->p_sys->b_visible )
333 X o o o X o X o o o o o o X X X X o o o X X X X X o o X X X o o o X X X o o X X o X X o o o X o o o X o X X X X X o X X X X o o X X X X X L
334 X o o o X o X o o o o o X o o o o o o o o o o X o o X o o o X o X o o o X o X o X o X o o o X o o o X o o o X o o o X o o o X o X o o o o L
335 o X o X o o X o o o o o X o o o o o o o o o X o o o X o o o X o X o o o X o X o o o X o o o X X X X X o o o X o o o X o o o X o X X X X o L
336 o X o X o o X o o o o o X o o o o o o o o X o o o o X o o o X o X o o o X o X o o o X o o o X o o o X o o o X o o o X o o o X o X o o o o L
337 o o X o o o X X X X X o o X X X X o o o X X X X X o o X X X o o o X X X o o X o o o X o o o X o o o X o X X X X X o X X X X o o X X X X X L
341 X o o o X o X o o o o o o X X X X o o o X X X X X o o X X X o o o X X X o o X X o X X o o o o X X X X o X o o o X o o X X X o o X o o o X L
342 X o o o X o X o o o o o X o o o o o o o o o o X o o X o o o X o X o o o X o X o X o X o o o X o o o o o X o o o X o X o o o X o X o o o X L
343 o X o X o o X o o o o o X o o o o o o o o o X o o o X o o o X o X o o o X o X o o o X o o o o X X X o o X X X X X o X o o o X o X o X o X L
344 o X o X o o X o o o o o X o o o o o o o o X o o o o X o o o X o X o o o X o X o o o X o o o o o o o X o X o o o X o X o o o X o X o X o X L
345 o o X o o o X X X X X o o X X X X o o o X X X X X o o X X X o o o X X X o o X o o o X o o o X X X X o o X o o o X o o X X X o o o X o X o L
353 if( p_vout->p_sys->b_visible )
356 memset( p_oyp->p_pixels
357 + (v_h+9)*p_oyp->i_pitch,
359 for( y = v_h + 10; y < v_h + 90; y++ )
361 int width = v_h + 90 - y;
362 width = (width*width)/160;
363 if( (80 - y + v_h)*10 < o_zoom )
365 memset( p_oyp->p_pixels
371 p_oyp->p_pixels[y*p_oyp->i_pitch] = 0xff;
372 p_oyp->p_pixels[y*p_oyp->i_pitch + width - 1] = 0xff;
377 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
380 /*****************************************************************************
381 * SendEvents: forward mouse and keyboard events to the parent p_vout
382 *****************************************************************************/
383 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
384 vlc_value_t oldval, vlc_value_t newval, void *p_data )
386 var_Set( (vlc_object_t *)p_data, psz_var, newval );
391 /*****************************************************************************
392 * SendEventsToChild: forward events to the child/children vout
393 *****************************************************************************/
394 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
395 vlc_value_t oldval, vlc_value_t newval, void *p_data )
397 vout_thread_t *p_vout = (vout_thread_t *)p_this;
398 var_Set( p_vout->p_sys->p_vout, psz_var, newval );
402 /*****************************************************************************
403 * MouseEvent: callback for mouse events
404 *****************************************************************************/
405 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
406 vlc_value_t oldval, vlc_value_t newval, void *p_data )
408 vout_thread_t *p_vout = (vout_thread_t*)p_data;
409 vlc_value_t vald,valx,valy;
412 #define MOUSE_CLICKED 2
413 #define MOUSE_MOVE_X 4
414 #define MOUSE_MOVE_Y 8
415 #define MOUSE_MOVE 12
418 int v_h = p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
419 int v_w = p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
421 if( psz_var[6] == 'x' ) mouse |= MOUSE_MOVE_X;
422 if( psz_var[6] == 'y' ) mouse |= MOUSE_MOVE_Y;
423 if( psz_var[6] == 'c' ) mouse |= MOUSE_CLICKED;
425 var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &vald );
426 if( vald.i_int & 0x1 ) mouse |= MOUSE_DOWN;
427 var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
428 var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );
430 if( ( mouse&MOUSE_MOVE && mouse&MOUSE_DOWN)
431 || mouse&MOUSE_CLICKED )
433 /* (mouse moved and mouse button is down) or (mouse clicked) */
434 if( p_vout->p_sys->b_visible )
437 && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM
439 && valx.i_int < (int)p_vout->output.i_width/VIS_ZOOM )
441 /* mouse is over visualisation */
442 p_vout->p_sys->i_x = __MIN( __MAX( valx.i_int*VIS_ZOOM - v_w/2, 0 ),
443 p_vout->output.i_width - v_w - 1);
444 p_vout->p_sys->i_y = __MIN( __MAX( valy.i_int * VIS_ZOOM - v_h/2,
445 0 ), p_vout->output.i_height - v_h - 1);
447 else if( valx.i_int >= 0 && valx.i_int < 80
448 && valy.i_int >= (int)p_vout->output.i_height/VIS_ZOOM
449 && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM + 9
450 && mouse&MOUSE_CLICKED )
452 /* mouse is over the "VLC ZOOM HIDE" text */
453 p_vout->p_sys->b_visible = VLC_FALSE;
455 else if( (int)p_vout->output.i_height/VIS_ZOOM + 9 <= valy.i_int
456 && valy.i_int <= (int)p_vout->output.i_height/VIS_ZOOM + 90
459 (( (int)p_vout->output.i_height/VIS_ZOOM + 90 - valy.i_int)
460 *( (int)p_vout->output.i_height/VIS_ZOOM + 90 - valy.i_int))/160 )
462 /* mouse is over zoom gauge */
463 p_vout->p_sys->i_zoom = __MAX( ZOOM_FACTOR,
464 ( 80 + (int)p_vout->output.i_height/VIS_ZOOM
465 - valy.i_int + 2) * ZOOM_FACTOR/10 );
467 else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
469 p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
470 *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
472 else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
474 p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
475 *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
480 if( valx.i_int >= 0 && valx.i_int < 80 && valy.i_int >= 0
481 && valy.i_int <= 10 && mouse&MOUSE_CLICKED )
483 /* mouse is over the "VLC ZOOM SHOW" text */
484 p_vout->p_sys->b_visible = VLC_TRUE;
486 else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
488 p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
489 *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
491 else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
493 p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
494 *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
500 __MAX( 0, __MIN( p_vout->p_sys->i_x, (int)p_vout->output.i_width
501 - (int)p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));
503 __MAX( 0, __MIN( p_vout->p_sys->i_y, (int)p_vout->output.i_height
504 - (int)p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));