git.sesse.net Git - vlc/blob - modules/video_filter/magnify.c

   1 /*****************************************************************************
   2  * magnify.c : Magnify/Zoom interactive effect
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
   8  *
   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.
  13  *
  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.
  18  *
  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  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc_vout.h>
  34
  35 #include <math.h>
  36
  37 #include "filter_common.h"
  38 #include "filter_picture.h"
  39
  40 #include "vlc_image.h"
  41 #include "vlc_input.h"
  42 #include "vlc_playlist.h"
  43
  44 /*****************************************************************************
  45  * Local prototypes
  46  *****************************************************************************/
  47 static int  Create    ( vlc_object_t * );
  48 static void Destroy   ( vlc_object_t * );
  49
  50 static int  Init      ( vout_thread_t * );
  51 static void End       ( vout_thread_t * );
  52 static void Render    ( vout_thread_t *, picture_t * );
  53
  54 static int  SendEvents   ( vlc_object_t *, char const *,
  55                            vlc_value_t, vlc_value_t, void * );
  56 static int  MouseEvent   ( vlc_object_t *, char const *,
  57                            vlc_value_t, vlc_value_t, void * );
  58
  59 /*****************************************************************************
  60  * Module descriptor
  61  *****************************************************************************/
  62 vlc_module_begin();
  63     set_description( _("Magnify/Zoom interactive video filter") );
  64     set_shortname( _( "Magnify" ));
  65     set_capability( "video filter", 0 );
  66     set_category( CAT_VIDEO );
  67     set_subcategory( SUBCAT_VIDEO_VFILTER );
  68
  69     set_callbacks( Create, Destroy );
  70 vlc_module_end();
  71
  72 /*****************************************************************************
  73  * vout_sys_t: Magnify video output method descriptor
  74  *****************************************************************************/
  75 struct vout_sys_t
  76 {
  77     vout_thread_t *p_vout;
  78
  79     image_handler_t *p_image;
  80
  81     int i_zoom; /* zoom level in percent */
  82     int i_x, i_y; /* top left corner coordinates in original image */
  83
  84     bool b_visible; /* is "interface" visible ? */
  85 };
  86
  87 /*****************************************************************************
  88  * Control: control facility for the vout (forwards to child vout)
  89  *****************************************************************************/
  90 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  91 {
  92     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  93 }
  94
  95 /*****************************************************************************
  96  * Create: allocates Magnify video thread output method
  97  *****************************************************************************/
  98 static int Create( vlc_object_t *p_this )
  99 {
 100     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 101
 102     switch( p_vout->fmt_in.i_chroma )
 103     {
 104         CASE_PLANAR_YUV
 105         case VLC_FOURCC('G','R','E','Y'):
 106             break;
 107         default:
 108             msg_Err( p_vout, "Unsupported chroma" );
 109             return VLC_EGENERIC;
 110     }
 111
 112     /* Allocate structure */
 113     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 114     if( p_vout->p_sys == NULL )
 115     {
 116         msg_Err( p_vout, "out of memory" );
 117         return VLC_ENOMEM;
 118     }
 119
 120     p_vout->p_sys->p_image = image_HandlerCreate( p_vout );
 121
 122     p_vout->pf_init = Init;
 123     p_vout->pf_end = End;
 124     p_vout->pf_manage = NULL;
 125     p_vout->pf_render = Render;
 126     p_vout->pf_display = NULL;
 127     p_vout->pf_control = Control;
 128
 129     return VLC_SUCCESS;
 130 }
 131
 132 /*****************************************************************************
 133  * Init: initialize Magnify video thread output method
 134  *****************************************************************************/
 135 static int Init( vout_thread_t *p_vout )
 136 {
 137     int i_index;
 138     picture_t *p_pic;
 139     video_format_t fmt;
 140
 141     memset( &fmt, 0, sizeof(video_format_t) );
 142     I_OUTPUTPICTURES = 0;
 143
 144     /* Initialize the output structure */
 145     p_vout->output.i_chroma = p_vout->render.i_chroma;
 146     p_vout->output.i_width  = p_vout->render.i_width;
 147     p_vout->output.i_height = p_vout->render.i_height;
 148     p_vout->output.i_aspect = p_vout->render.i_aspect;
 149
 150     p_vout->fmt_out = p_vout->fmt_in;
 151     fmt = p_vout->fmt_out;
 152
 153     /* Try to open the real video output */
 154     msg_Dbg( p_vout, "spawning the real video output" );
 155
 156     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 157
 158     /* Everything failed */
 159     if( p_vout->p_sys->p_vout == NULL )
 160     {
 161         msg_Err( p_vout, "cannot open vout, aborting" );
 162         return VLC_EGENERIC;
 163     }
 164
 165 #define VIS_ZOOM 4
 166     p_vout->p_sys->i_x = 0;
 167     p_vout->p_sys->i_y = 0;
 168 #define ZOOM_FACTOR 8
 169     p_vout->p_sys->i_zoom = 2*ZOOM_FACTOR;
 170     p_vout->p_sys->b_visible = true;
 171
 172     var_AddCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout );
 173     var_AddCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout );
 174     var_AddCallback( p_vout->p_sys->p_vout, "mouse-clicked",
 175                      MouseEvent, p_vout);
 176
 177     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 178     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 179     ADD_PARENT_CALLBACKS( SendEventsToChild );
 180
 181     return VLC_SUCCESS;
 182 }
 183
 184 /*****************************************************************************
 185  * End: terminate Magnify video thread output method
 186  *****************************************************************************/
 187 static void End( vout_thread_t *p_vout )
 188 {
 189     int i_index;
 190
 191     /* Free the fake output buffers we allocated */
 192     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 193     {
 194         i_index--;
 195         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 196     }
 197
 198     var_DelCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
 199     var_DelCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
 200     var_DelCallback( p_vout->p_sys->p_vout, "mouse-clicked", MouseEvent, p_vout);
 201 }
 202
 203 /*****************************************************************************
 204  * Destroy: destroy Magnify video thread output method
 205  *****************************************************************************/
 206 static void Destroy( vlc_object_t *p_this )
 207 {
 208     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 209
 210     if( p_vout->p_sys->p_vout )
 211     {
 212         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 213         vlc_object_detach( p_vout->p_sys->p_vout );
 214         vout_Destroy( p_vout->p_sys->p_vout );
 215     }
 216
 217     image_HandlerDelete( p_vout->p_sys->p_image );
 218
 219     DEL_PARENT_CALLBACKS( SendEventsToChild );
 220
 221     free( p_vout->p_sys );
 222 }
 223
 224 /*****************************************************************************
 225  * Render: displays previously rendered output
 226  *****************************************************************************/
 227 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 228 {
 229     picture_t *p_outpic;
 230
 231     int o_x = p_vout->p_sys->i_x;
 232     int o_y = p_vout->p_sys->i_y;
 233     int o_zoom = p_vout->p_sys->i_zoom;
 234     int x,y,o_yp,o_xp;
 235     int v_w, v_h;
 236     video_format_t fmt_out;
 237     picture_t *p_converted;
 238     plane_t *p_oyp=NULL;
 239     int i_plane;
 240
 241     memset( &fmt_out, 0, sizeof(video_format_t) );
 242     /* This is a new frame. Get a structure from the video_output. */
 243     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 244               == NULL )
 245     {
 246         if( p_vout->b_die || p_vout->b_error )
 247         {
 248             return;
 249         }
 250         msleep( VOUT_OUTMEM_SLEEP );
 251     }
 252
 253     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 254
 255     p_oyp = &(p_outpic->p[Y_PLANE]);
 256
 257     /* background magnified image */
 258     if( o_zoom != ZOOM_FACTOR )
 259     {
 260         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 261         {
 262             o_yp = o_y*p_outpic->p[i_plane].i_lines
 263                    /p_outpic->p[Y_PLANE].i_lines;
 264             o_xp = o_x*p_outpic->p[i_plane].i_pitch
 265                    /p_outpic->p[Y_PLANE].i_pitch;
 266             int i_pitch = p_outpic->p[i_plane].i_pitch;
 267 #if 0
 268             int o_zoom2 = o_zoom*o_zoom;
 269             int o_zoom3 = o_zoom*o_zoom*o_zoom;
 270             int o_zoom4 = o_zoom*o_zoom*o_zoom*o_zoom;
 271             int o_zoom6 = o_zoom*o_zoom*o_zoom * o_zoom*o_zoom*o_zoom;
 272 #endif
 273             for( y=0; y<p_outpic->p[i_plane].i_visible_lines; y++ )
 274             {
 275                 for( x=0; x<p_outpic->p[i_plane].i_visible_pitch; x++ )
 276                 {
 277 #if 0
 278                     /* Nearest neighbor */
 279                     int nx = o_xp + x*ZOOM_FACTOR/o_zoom;
 280                     int ny = o_yp + y*ZOOM_FACTOR/o_zoom;
 281                     p_outpic->p[i_plane].p_pixels[y*i_pitch+x] =
 282                         p_pic->p[i_plane].p_pixels[ny*i_pitch+nx];
 283 #elif 1
 284                     /* Bi-linear */
 285                     int nx_real = o_xp*o_zoom + x*ZOOM_FACTOR;
 286                     int ny_real = o_yp*o_zoom + y*ZOOM_FACTOR;
 287                     int nx = nx_real/o_zoom;
 288                     int ny = ny_real/o_zoom;
 289                     int wtl = ((nx+1)*o_zoom-nx_real)*((ny+1)*o_zoom-ny_real);
 290                     int wtr = (nx_real-nx*o_zoom)*((ny+1)*o_zoom-ny_real);
 291                     int wbl = ((nx+1)*o_zoom-nx_real)*(ny_real-ny*o_zoom);
 292                     int wbr = (nx_real-nx*o_zoom)*(ny_real-ny*o_zoom);
 293                     p_outpic->p[i_plane].p_pixels[y*i_pitch+x] =
 294                         ( wtl*p_pic->p[i_plane].p_pixels[ny*i_pitch+nx]
 295                         + wtr*p_pic->p[i_plane].p_pixels[ny*i_pitch+(nx+1)]
 296                         + wbl*p_pic->p[i_plane].p_pixels[(ny+1)*i_pitch+nx]
 297                         + wbr*p_pic->p[i_plane].p_pixels[(ny+1)*i_pitch+(nx+1)]
 298                         ) / (o_zoom*o_zoom);
 299 #else
 300                     /* Bi-cubic */
 301                     /* FIXME: doesn't work */
 302                     /* \Sigma_{i=0..3} \Sigma_{j=0..3} \alpha_{i,j} x^i y^j
 303                      * 16 \alpha_{i,j} so we need to use the 16 nearest pixels
 304                      *
 305                      * In fact we should be able to write it as:
 306                      * \Pi_{i=1..16} [ \Pi_{j!=i} ( x - x_j ) * ( y - y_j ) ]
 307                      *   * z_i / [ \Pi_{j!=i} ( x_i - x_j ) * ( y_i - y_j ) ]
 308                      * We also have to make sure that we don't use any
 309                      * x_j == x_i or y_j == y_i in the \Pi on j (else we get
 310                      * a 0/0 which kind of sucks) .
 311                      */
 312                     uint8_t *p = p_pic->p[i_plane].p_pixels;
 313                     int nx_real = o_xp*o_zoom + x*ZOOM_FACTOR;
 314                     int ny_real = o_yp*o_zoom + y*ZOOM_FACTOR;
 315
 316                     int nx = nx_real/o_zoom;
 317                     int ny = ny_real/o_zoom;
 318
 319                     int xi, yi, xj, yj;
 320                     int my = __MAX( ny-1, 0 );
 321                     int mx = __MAX( nx-1, 0 );
 322                     //p_outpic->p[i_plane].i_visible_lines - 4
 323                     //p_outpic->p[i_plane].i_visible_pitch - 4
 324                     int v = 1;
 325                     for( yi = my; yi <= my+3; yi++ )
 326                     {
 327                         int numy = 1;
 328                         int deny = 1;
 329                         /*
 330                         for( yj = my; yj <= my+3; yj++ )
 331                         {
 332                             if( yj != yi )
 333                             {
 334                                 numy *= (ny_real-yj*o_zoom);
 335                                 deny *= (yi - yj);
 336                             }
 337                         }
 338                         numy /= o_zoom2;*/
 339                         for( xi = mx; xi <= mx+3; xi++ )
 340                         {
 341                             int num = numy;
 342                             int den = deny;
 343                             for( xj = mx; xj <= mx+3; xj++ )
 344                             {
 345                                 if( xj != xi )
 346                                 {
 347                                     num *= (nx_real-xj*o_zoom);
 348                                     den *= (xi - xj);
 349                                 }
 350                             }
 351                             v = ( v * (p[yi*i_pitch+xi] * num) ) / ( den * o_zoom3 );
 352                         }
 353                     }
 354                     p_outpic->p[i_plane].p_pixels[y*i_pitch+x] = v;
 355 #endif
 356                 }
 357             }
 358         }
 359     }
 360     else
 361     {
 362         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 363         {
 364         vlc_memcpy( p_outpic->p[i_plane].p_pixels, p_pic->p[i_plane].p_pixels,
 365             p_outpic->p[i_plane].i_lines * p_outpic->p[i_plane].i_pitch );
 366         }
 367     }
 368
 369     if( p_vout->p_sys->b_visible )
 370     {
 371         /* image visualization */
 372         fmt_out = p_vout->fmt_out;
 373         fmt_out.i_width = p_vout->render.i_width/VIS_ZOOM;
 374         fmt_out.i_height = p_vout->render.i_height/VIS_ZOOM;
 375         p_converted = image_Convert( p_vout->p_sys->p_image, p_pic,
 376                                      &(p_pic->format), &fmt_out );
 377         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 378         {
 379             for( y=0; y<p_converted->p[i_plane].i_visible_lines; y++)
 380             {
 381                 vlc_memcpy(
 382                 p_outpic->p[i_plane].p_pixels+y*p_outpic->p[i_plane].i_pitch,
 383                 p_converted->p[i_plane].p_pixels+y*p_converted->p[i_plane].i_pitch,
 384                 p_converted->p[i_plane].i_visible_pitch );
 385             }
 386         }
 387         p_converted->pf_release( p_converted );
 388
 389         /* white rectangle on visualization */
 390         v_w = p_oyp->i_pitch*ZOOM_FACTOR/(VIS_ZOOM*o_zoom);
 391         v_h = (o_y+p_oyp->i_lines*ZOOM_FACTOR/o_zoom)/VIS_ZOOM;
 392         /* top line */
 393         vlc_memset( p_oyp->p_pixels
 394                                      + o_y/VIS_ZOOM*p_oyp->i_pitch
 395                                      + o_x/VIS_ZOOM, 0xff, v_w+1 );
 396
 397         for( y = o_y/VIS_ZOOM+1; y < v_h; y++ )
 398         {
 399             /* left line */
 400             p_oyp->p_pixels[
 401                 y*p_oyp->i_pitch+o_x/VIS_ZOOM
 402             ] = 0xff;
 403             /* right line */
 404             p_oyp->p_pixels[
 405                 y*p_oyp->i_pitch+o_x/VIS_ZOOM + v_w
 406             ] = 0xff;
 407         }
 408         /* bottom line */
 409         vlc_memset( p_oyp->p_pixels
 410                                      + v_h*p_oyp->i_pitch
 411                                      + o_x/VIS_ZOOM, 0xff, v_w+1 );
 412
 413         /* */
 414         v_h = p_oyp->i_lines/VIS_ZOOM;
 415     }
 416     else
 417     {
 418         v_h = 1;
 419     }
 420
 421     /* print a small "VLC ZOOM" ... gruikkkkkkkkk */
 422 #define DRAW(a) {int c,l=1;L a;}
 423 #define L ;l++,c=1
 424 #define X ;draw(l,c);c+=1
 425 #define o +1
 426 #define draw(y,x) p_oyp->p_pixels[(v_h+y)*p_oyp->i_pitch+x] = 0xff;
 427 if( p_vout->p_sys->b_visible )
 428 DRAW(
 429 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
 430 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
 431 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
 432 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
 433 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
 434 )
 435 else
 436 DRAW(
 437 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
 438 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
 439 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
 440 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
 441 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
 442 )
 443 #undef DRAW
 444 #undef L
 445 #undef X
 446 #undef O
 447 #undef draw
 448
 449     if( p_vout->p_sys->b_visible )
 450     {
 451         /* zoom gauge */
 452         vlc_memset( p_oyp->p_pixels + (v_h+9)*p_oyp->i_pitch, 0xff, 41 );
 453         for( y = v_h + 10; y < v_h + 90; y++ )
 454         {
 455             int width = v_h + 90 - y;
 456             width = (width*width)/160;
 457             if( (80 - y + v_h)*10 < o_zoom )
 458             {
 459                 vlc_memset( p_oyp->p_pixels + y*p_oyp->i_pitch, 0xff, width );
 460             }
 461             else
 462             {
 463                 p_oyp->p_pixels[y*p_oyp->i_pitch] = 0xff;
 464                 p_oyp->p_pixels[y*p_oyp->i_pitch + width - 1] = 0xff;
 465             }
 466         }
 467     }
 468
 469     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 470 }
 471
 472 /*****************************************************************************
 473  * SendEvents: forward mouse and keyboard events to the parent p_vout
 474  *****************************************************************************/
 475 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 476                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 477 {
 478     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 479     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 480
 481     return VLC_SUCCESS;
 482 }
 483
 484 /*****************************************************************************
 485  * SendEventsToChild: forward events to the child/children vout
 486  *****************************************************************************/
 487 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 488                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 489 {
 490     VLC_UNUSED(p_data); VLC_UNUSED(oldval);
 491     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 492     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 493     return VLC_SUCCESS;
 494 }
 495
 496 /*****************************************************************************
 497  * MouseEvent: callback for mouse events
 498  *****************************************************************************/
 499 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
 500                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 501 {
 502     VLC_UNUSED(p_this);
 503     vout_thread_t *p_vout = (vout_thread_t*)p_data;
 504     vlc_value_t vald,valx,valy;
 505
 506 #define MOUSE_DOWN    1
 507 #define MOUSE_CLICKED 2
 508 #define MOUSE_MOVE_X  4
 509 #define MOUSE_MOVE_Y  8
 510 #define MOUSE_MOVE    12
 511     uint8_t mouse= 0;
 512
 513     int v_h = p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 514     int v_w = p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 515
 516     if( psz_var[6] == 'x' ) mouse |= MOUSE_MOVE_X;
 517     if( psz_var[6] == 'y' ) mouse |= MOUSE_MOVE_Y;
 518     if( psz_var[6] == 'c' ) mouse |= MOUSE_CLICKED;
 519
 520     var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &vald );
 521     if( vald.i_int & 0x1 ) mouse |= MOUSE_DOWN;
 522     var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
 523     var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );
 524
 525     if( ( mouse&MOUSE_MOVE && mouse&MOUSE_DOWN)
 526         || mouse&MOUSE_CLICKED )
 527     {
 528     /* (mouse moved and mouse button is down) or (mouse clicked) */
 529         if( p_vout->p_sys->b_visible )
 530         {
 531             if(    0 <= valy.i_int
 532                 && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM
 533                 && 0 <= valx.i_int
 534                 && valx.i_int < (int)p_vout->output.i_width/VIS_ZOOM )
 535             {
 536             /* mouse is over visualisation */
 537                 p_vout->p_sys->i_x = __MIN( __MAX( valx.i_int*VIS_ZOOM - v_w/2, 0 ),
 538                                             p_vout->output.i_width - v_w - 1);
 539                 p_vout->p_sys->i_y = __MIN( __MAX( valy.i_int * VIS_ZOOM - v_h/2,
 540                                         0 ), p_vout->output.i_height - v_h - 1);
 541             }
 542             else if( valx.i_int >= 0 && valx.i_int < 80
 543                 && valy.i_int >= (int)p_vout->output.i_height/VIS_ZOOM
 544                 && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM + 9
 545                 && mouse&MOUSE_CLICKED )
 546             {
 547             /* mouse is over the "VLC ZOOM HIDE" text */
 548                 p_vout->p_sys->b_visible = false;
 549             }
 550             else if(    (int)p_vout->output.i_height/VIS_ZOOM + 9 <= valy.i_int
 551                      && valy.i_int <= (int)p_vout->output.i_height/VIS_ZOOM + 90
 552                      && 0 <= valx.i_int
 553                      && valx.i_int <=
 554                      (( (int)p_vout->output.i_height/VIS_ZOOM + 90 -  valy.i_int)
 555                *( (int)p_vout->output.i_height/VIS_ZOOM + 90 -  valy.i_int))/160 )
 556             {
 557             /* mouse is over zoom gauge */
 558                 p_vout->p_sys->i_zoom = __MAX( ZOOM_FACTOR,
 559                                 ( 80 + (int)p_vout->output.i_height/VIS_ZOOM
 560                                    - valy.i_int + 2) * ZOOM_FACTOR/10 );
 561             }
 562             else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
 563             {
 564                 p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
 565                                       *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 566             }
 567             else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
 568             {
 569                 p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
 570                                       *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 571             }
 572         }
 573         else
 574         {
 575             if( valx.i_int >= 0 && valx.i_int < 80 && valy.i_int >= 0
 576                 && valy.i_int <= 10 && mouse&MOUSE_CLICKED )
 577             {
 578             /* mouse is over the "VLC ZOOM SHOW" text */
 579                 p_vout->p_sys->b_visible = true;
 580             }
 581             else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
 582             {
 583                 p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
 584                                       *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 585             }
 586             else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
 587             {
 588                 p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
 589                                       *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 590             }
 591         }
 592     }
 593
 594     p_vout->p_sys->i_x =
 595          __MAX( 0, __MIN( p_vout->p_sys->i_x, (int)p_vout->output.i_width
 596          - (int)p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));
 597     p_vout->p_sys->i_y =
 598          __MAX( 0, __MIN( p_vout->p_sys->i_y, (int)p_vout->output.i_height
 599         - (int)p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));
 600
 601
 602     return VLC_SUCCESS;
 603 }