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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
39 #include "filter_common.h"
40 #include "filter_picture.h"
42 #include "vlc_image.h"
44 /*****************************************************************************
46 *****************************************************************************/
47 static int Create ( vlc_object_t * );
48 static void Destroy ( vlc_object_t * );
51 set_description( N_("Magnify/Zoom interactive video filter") )
52 set_shortname( N_( "Magnify" ))
53 set_capability( "video filter", 0 )
54 set_category( CAT_VIDEO )
55 set_subcategory( SUBCAT_VIDEO_VFILTER )
57 set_callbacks( Create, Destroy )
61 /*****************************************************************************
63 *****************************************************************************/
64 static int Init ( vout_thread_t * );
65 static void End ( vout_thread_t * );
66 static void Render ( vout_thread_t *, picture_t * );
68 static int MouseEvent( vlc_object_t *, char const *,
69 vlc_value_t, vlc_value_t, void * );
71 static void DrawZoomStatus( uint8_t *, int i_pitch, int i_width, int i_height,
72 int i_offset_x, int i_offset_y, bool b_visible );
73 static void DrawRectangle( uint8_t *, int i_pitch, int i_width, int i_height,
74 int x, int y, int i_w, int i_h );
76 /*****************************************************************************
77 * vout_sys_t: Magnify video output method descriptor
78 *****************************************************************************/
81 vout_thread_t *p_vout;
83 image_handler_t *p_image;
85 int64_t i_hide_timeout;
88 int i_zoom; /* zoom level in percent */
89 int i_x, i_y; /* top left corner coordinates in original image */
91 bool b_visible; /* is "interface" visible ? */
93 int64_t i_last_activity;
99 /*****************************************************************************
100 * Control: control facility for the vout (forwards to child vout)
101 *****************************************************************************/
102 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
104 return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
107 /*****************************************************************************
108 * Create: allocates Magnify video thread output method
109 *****************************************************************************/
110 static int Create( vlc_object_t *p_this )
112 vout_thread_t *p_vout = (vout_thread_t *)p_this;
114 switch( p_vout->fmt_in.i_chroma )
120 msg_Err( p_vout, "Unsupported chroma" );
124 /* Allocate structure */
125 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
126 if( p_vout->p_sys == NULL )
129 p_vout->p_sys->p_image = image_HandlerCreate( p_vout );
131 p_vout->pf_init = Init;
132 p_vout->pf_end = End;
133 p_vout->pf_manage = NULL;
134 p_vout->pf_render = Render;
135 p_vout->pf_display = NULL;
136 p_vout->pf_control = Control;
141 /*****************************************************************************
142 * Init: initialize Magnify video thread output method
143 *****************************************************************************/
144 static int Init( vout_thread_t *p_vout )
148 I_OUTPUTPICTURES = 0;
150 memset( &fmt, 0, sizeof(video_format_t) );
152 /* Initialize the output structure */
153 p_vout->output.i_chroma = p_vout->render.i_chroma;
154 p_vout->output.i_width = p_vout->render.i_width;
155 p_vout->output.i_height = p_vout->render.i_height;
156 p_vout->output.i_aspect = p_vout->render.i_aspect;
158 p_vout->fmt_out = p_vout->fmt_in;
159 fmt = p_vout->fmt_out;
161 /* Try to open the real video output */
162 msg_Dbg( p_vout, "spawning the real video output" );
164 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
166 /* Everything failed */
167 if( p_vout->p_sys->p_vout == NULL )
169 msg_Err( p_vout, "cannot open vout, aborting" );
173 vlc_mutex_init( &p_vout->p_sys->lock );
174 p_vout->p_sys->i_x = 0;
175 p_vout->p_sys->i_y = 0;
176 p_vout->p_sys->i_zoom = 2*ZOOM_FACTOR;
177 p_vout->p_sys->b_visible = true;
178 p_vout->p_sys->i_last_activity = mdate();
179 p_vout->p_sys->i_hide_timeout = 1000 * var_GetInteger( p_vout, "mouse-hide-timeout" );
181 vout_filter_AllocateDirectBuffers( p_vout, VOUT_MAX_PICTURES );
183 vout_filter_AddChild( p_vout, p_vout->p_sys->p_vout, MouseEvent );
188 /*****************************************************************************
189 * End: terminate Magnify video thread output method
190 *****************************************************************************/
191 static void End( vout_thread_t *p_vout )
193 vout_sys_t *p_sys = p_vout->p_sys;
195 vout_filter_DelChild( p_vout, p_sys->p_vout, MouseEvent );
196 vout_CloseAndRelease( p_sys->p_vout );
198 vout_filter_ReleaseDirectBuffers( p_vout );
200 vlc_mutex_destroy( &p_vout->p_sys->lock );
203 /*****************************************************************************
204 * Destroy: destroy Magnify video thread output method
205 *****************************************************************************/
206 static void Destroy( vlc_object_t *p_this )
208 vout_thread_t *p_vout = (vout_thread_t *)p_this;
210 image_HandlerDelete( p_vout->p_sys->p_image );
213 free( p_vout->p_sys );
216 /*****************************************************************************
217 * Render: displays previously rendered output
218 *****************************************************************************/
219 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
221 vout_sys_t *p_sys = p_vout->p_sys;
225 picture_t *p_converted;
229 /* This is a new frame. Get a structure from the video_output. */
230 while( ( p_outpic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) )
233 if( !vlc_object_alive (p_vout) || p_vout->b_error )
237 msleep( VOUT_OUTMEM_SLEEP );
240 p_outpic->date = p_pic->date;
242 vlc_mutex_lock( &p_sys->lock );
243 const bool b_visible = p_sys->b_visible;
244 const int o_x = p_sys->i_x;
245 const int o_y = p_sys->i_y;
246 const int o_zoom = p_sys->i_zoom;
247 const int64_t i_last_activity = p_sys->i_last_activity;
248 vlc_mutex_unlock( &p_sys->lock );
250 /* background magnified image */
251 if( o_zoom != ZOOM_FACTOR )
253 video_format_t fmt_in;
254 video_format_t fmt_out;
258 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
260 const int o_yp = o_y * p_outpic->p[i_plane].i_lines / p_outpic->p[Y_PLANE].i_lines;
261 const int o_xp = o_x * p_outpic->p[i_plane].i_pitch / p_outpic->p[Y_PLANE].i_pitch;
263 crop.p[i_plane].p_pixels += o_yp * p_outpic->p[i_plane].i_pitch + o_xp;
267 fmt_in = p_vout->fmt_out;
268 fmt_in.i_width = (fmt_in.i_width * ZOOM_FACTOR / o_zoom) & ~1;
269 fmt_in.i_height = (fmt_in.i_height * ZOOM_FACTOR / o_zoom) & ~1;
272 fmt_out = p_vout->fmt_out;
274 p_converted = image_Convert( p_sys->p_image, &crop, &fmt_in, &fmt_out );
276 picture_CopyPixels( p_outpic, p_converted );
278 picture_Release( p_converted );
282 picture_CopyPixels( p_outpic, p_pic );
286 p_oyp = &p_outpic->p[Y_PLANE];
289 video_format_t fmt_out;
291 /* image visualization */
292 fmt_out = p_vout->fmt_out;
293 fmt_out.i_width = (p_vout->render.i_width/VIS_ZOOM ) & ~1;
294 fmt_out.i_height = (p_vout->render.i_height/VIS_ZOOM) & ~1;
295 p_converted = image_Convert( p_sys->p_image, p_pic,
296 &p_pic->format, &fmt_out );
297 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
300 for( y = 0; y < p_converted->p[i_plane].i_visible_lines; y++)
303 &p_outpic->p[i_plane].p_pixels[y*p_outpic->p[i_plane].i_pitch],
304 p_converted->p[i_plane].p_pixels+y*p_converted->p[i_plane].i_pitch,
305 p_converted->p[i_plane].i_visible_pitch );
308 picture_Release( p_converted );
310 /* white rectangle on visualization */
311 v_w = __MIN( fmt_out.i_width * ZOOM_FACTOR / o_zoom, fmt_out.i_width - 1 );
312 v_h = __MIN( fmt_out.i_height * ZOOM_FACTOR / o_zoom, fmt_out.i_height - 1 );
314 DrawRectangle( p_oyp->p_pixels, p_oyp->i_pitch,
315 p_oyp->i_pitch, p_oyp->i_lines,
316 o_x/VIS_ZOOM, o_y/VIS_ZOOM,
320 v_h = fmt_out.i_height + 1;
327 /* print a small "VLC ZOOM" */
328 if( b_visible || i_last_activity + p_sys->i_hide_timeout > mdate() )
329 DrawZoomStatus( p_oyp->p_pixels, p_oyp->i_pitch, p_oyp->i_pitch, p_oyp->i_lines,
337 vlc_memset( p_oyp->p_pixels + (v_h+9)*p_oyp->i_pitch, 0xff, 41 );
338 for( y = v_h + 10; y < v_h + 90; y++ )
340 int width = v_h + 90 - y;
341 width = (width*width)/160;
342 if( (80 - y + v_h)*ZOOM_FACTOR/10 < o_zoom )
344 vlc_memset( p_oyp->p_pixels + y*p_oyp->i_pitch, 0xff, width );
348 p_oyp->p_pixels[y*p_oyp->i_pitch] = 0xff;
349 p_oyp->p_pixels[y*p_oyp->i_pitch + width - 1] = 0xff;
354 vout_DisplayPicture( p_sys->p_vout, p_outpic );
357 static void DrawZoomStatus( uint8_t *pb_dst, int i_pitch, int i_width, int i_height,
358 int i_offset_x, int i_offset_y, bool b_visible )
360 static const char *p_hide =
361 "X X X XXXX XXXXX XXX XXX XX XX X X XXXXX XXXX XXXXXL"
362 "X X X X X X X X X X X X X X X X X X L"
363 " X X X X X X X X X X X XXXXX X X X XXXX L"
364 " X X X X X X X X X X X X X X X X X L"
365 " X XXXXX XXXX XXXXX XXX XXX X X X X XXXXX XXXX XXXXXL";
366 static const char *p_show =
367 "X X X XXXX XXXXX XXX XXX XX XX XXXX X X XXX X XL"
368 "X X X X X X X X X X X X X X X X X X XL"
369 " X X X X X X X X X X X XXX XXXXX X X X X XL"
370 " X X X X X X X X X X X X X X X X X X XL"
371 " X XXXXX XXXX XXXXX XXX XXX X X XXXX X X XXX X X L";
372 const char *p_draw = b_visible ? p_hide : p_show;
375 for( i = 0, x = i_offset_x, y = i_offset_y; p_draw[i] != '\0'; i++ )
377 if( p_draw[i] == 'X' )
379 if( x < i_width && y < i_height )
380 pb_dst[y*i_pitch + x] = 0xff;
383 else if( p_draw[i] == ' ' )
387 else if( p_draw[i] == 'L' )
394 static void DrawRectangle( uint8_t *pb_dst, int i_pitch, int i_width, int i_height,
395 int x, int y, int i_w, int i_h )
399 if( x + i_w > i_width || y + i_h > i_height )
403 vlc_memset( &pb_dst[y * i_pitch + x], 0xff, i_w );
406 for( dy = 1; dy < i_h-1; dy++ )
408 pb_dst[(y+dy) * i_pitch + x + 0] = 0xff;
409 pb_dst[(y+dy) * i_pitch + x + i_w-1] = 0xff;
413 vlc_memset( &pb_dst[(y+i_h-1) * i_pitch + x], 0xff, i_w );
416 /*****************************************************************************
417 * MouseEvent: callback for mouse events
418 *****************************************************************************/
419 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
420 vlc_value_t oldval, vlc_value_t newval, void *p_data )
422 vout_thread_t *p_vout = p_data;
423 vlc_value_t vald,valx,valy;
425 assert( p_this == VLC_OBJECT(p_vout->p_sys->p_vout) );
428 #define MOUSE_CLICKED 2
429 #define MOUSE_MOVE_X 4
430 #define MOUSE_MOVE_Y 8
431 #define MOUSE_MOVE 12
434 if( psz_var[6] == 'x' ) mouse |= MOUSE_MOVE_X;
435 if( psz_var[6] == 'y' ) mouse |= MOUSE_MOVE_Y;
436 if( psz_var[6] == 'c' ) mouse |= MOUSE_CLICKED;
438 var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &vald );
439 if( vald.i_int & 0x1 ) mouse |= MOUSE_DOWN;
440 var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
441 var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );
443 vlc_mutex_lock( &p_vout->p_sys->lock );
445 const int v_h = p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
446 const int v_w = p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
448 if( ( mouse&MOUSE_MOVE && mouse&MOUSE_DOWN)
449 || mouse&MOUSE_CLICKED )
451 /* (mouse moved and mouse button is down) or (mouse clicked) */
452 if( p_vout->p_sys->b_visible )
455 && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM
457 && valx.i_int < (int)p_vout->output.i_width/VIS_ZOOM )
459 /* mouse is over visualisation */
460 p_vout->p_sys->i_x = __MIN( __MAX( valx.i_int*VIS_ZOOM - v_w/2, 0 ),
461 p_vout->output.i_width - v_w - 1);
462 p_vout->p_sys->i_y = __MIN( __MAX( valy.i_int * VIS_ZOOM - v_h/2,
463 0 ), p_vout->output.i_height - v_h - 1);
465 else if( valx.i_int >= 0 && valx.i_int < 80
466 && valy.i_int >= (int)p_vout->output.i_height/VIS_ZOOM
467 && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM + 9
468 && mouse&MOUSE_CLICKED )
470 /* mouse is over the "VLC ZOOM HIDE" text */
471 p_vout->p_sys->b_visible = false;
473 else if( (int)p_vout->output.i_height/VIS_ZOOM + 9 <= valy.i_int
474 && valy.i_int <= (int)p_vout->output.i_height/VIS_ZOOM + 90
477 (( (int)p_vout->output.i_height/VIS_ZOOM + 90 - valy.i_int)
478 *( (int)p_vout->output.i_height/VIS_ZOOM + 90 - valy.i_int))/160 )
480 /* mouse is over zoom gauge */
481 p_vout->p_sys->i_zoom = __MAX( ZOOM_FACTOR,
482 ( 80 + (int)p_vout->output.i_height/VIS_ZOOM
483 - valy.i_int + 2) * ZOOM_FACTOR/10 );
485 else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
487 p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
488 *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
490 else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
492 p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
493 *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
498 if( valx.i_int >= 0 && valx.i_int < 80 && valy.i_int >= 0
499 && valy.i_int <= 10 && mouse&MOUSE_CLICKED )
501 /* mouse is over the "VLC ZOOM SHOW" text */
502 p_vout->p_sys->b_visible = true;
504 else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
506 p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
507 *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
509 else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
511 p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
512 *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
518 __MAX( 0, __MIN( p_vout->p_sys->i_x, (int)p_vout->output.i_width
519 - (int)p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));
521 __MAX( 0, __MIN( p_vout->p_sys->i_y, (int)p_vout->output.i_height
522 - (int)p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));
524 p_vout->p_sys->i_last_activity = mdate();
525 vlc_mutex_unlock( &p_vout->p_sys->lock );
527 /* FIXME forward event when not grabbed */