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_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_vout.h>
  35
  36 #include <math.h>
  37
  38 #include "filter_common.h"
  39 #include "filter_picture.h"
  40
  41 #include "vlc_image.h"
  42 #include "vlc_input.h"
  43 #include "vlc_playlist.h"
  44
  45 /*****************************************************************************
  46  * Local prototypes
  47  *****************************************************************************/
  48 static int  Create    ( vlc_object_t * );
  49 static void Destroy   ( vlc_object_t * );
  50
  51 static int  Init      ( vout_thread_t * );
  52 static void End       ( vout_thread_t * );
  53 static void Render    ( vout_thread_t *, picture_t * );
  54
  55 static int  SendEvents   ( vlc_object_t *, char const *,
  56                            vlc_value_t, vlc_value_t, void * );
  57 static int  MouseEvent   ( vlc_object_t *, char const *,
  58                            vlc_value_t, vlc_value_t, void * );
  59
  60 /*****************************************************************************
  61  * Module descriptor
  62  *****************************************************************************/
  63 vlc_module_begin();
  64     set_description( N_("Magnify/Zoom interactive video filter") );
  65     set_shortname( N_( "Magnify" ));
  66     set_capability( "video filter", 0 );
  67     set_category( CAT_VIDEO );
  68     set_subcategory( SUBCAT_VIDEO_VFILTER );
  69
  70     set_callbacks( Create, Destroy );
  71 vlc_module_end();
  72
  73 /*****************************************************************************
  74  * vout_sys_t: Magnify video output method descriptor
  75  *****************************************************************************/
  76 struct vout_sys_t
  77 {
  78     vout_thread_t *p_vout;
  79
  80     image_handler_t *p_image;
  81
  82     int i_zoom; /* zoom level in percent */
  83     int i_x, i_y; /* top left corner coordinates in original image */
  84
  85     bool b_visible; /* is "interface" visible ? */
  86 };
  87
  88 /*****************************************************************************
  89  * Control: control facility for the vout (forwards to child vout)
  90  *****************************************************************************/
  91 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  92 {
  93     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  94 }
  95
  96 /*****************************************************************************
  97  * Create: allocates Magnify video thread output method
  98  *****************************************************************************/
  99 static int Create( vlc_object_t *p_this )
 100 {
 101     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 102
 103     switch( p_vout->fmt_in.i_chroma )
 104     {
 105         CASE_PLANAR_YUV
 106         case VLC_FOURCC('G','R','E','Y'):
 107             break;
 108         default:
 109             msg_Err( p_vout, "Unsupported chroma" );
 110             return VLC_EGENERIC;
 111     }
 112
 113     /* Allocate structure */
 114     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 115     if( p_vout->p_sys == NULL )
 116     {
 117         msg_Err( p_vout, "out of memory" );
 118         return VLC_ENOMEM;
 119     }
 120
 121     p_vout->p_sys->p_image = image_HandlerCreate( p_vout );
 122
 123     p_vout->pf_init = Init;
 124     p_vout->pf_end = End;
 125     p_vout->pf_manage = NULL;
 126     p_vout->pf_render = Render;
 127     p_vout->pf_display = NULL;
 128     p_vout->pf_control = Control;
 129
 130     return VLC_SUCCESS;
 131 }
 132
 133 /*****************************************************************************
 134  * Init: initialize Magnify video thread output method
 135  *****************************************************************************/
 136 static int Init( vout_thread_t *p_vout )
 137 {
 138     int i_index;
 139     picture_t *p_pic;
 140     video_format_t fmt;
 141
 142     memset( &fmt, 0, sizeof(video_format_t) );
 143     I_OUTPUTPICTURES = 0;
 144
 145     /* Initialize the output structure */
 146     p_vout->output.i_chroma = p_vout->render.i_chroma;
 147     p_vout->output.i_width  = p_vout->render.i_width;
 148     p_vout->output.i_height = p_vout->render.i_height;
 149     p_vout->output.i_aspect = p_vout->render.i_aspect;
 150
 151     p_vout->fmt_out = p_vout->fmt_in;
 152     fmt = p_vout->fmt_out;
 153
 154     /* Try to open the real video output */
 155     msg_Dbg( p_vout, "spawning the real video output" );
 156
 157     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 158
 159     /* Everything failed */
 160     if( p_vout->p_sys->p_vout == NULL )
 161     {
 162         msg_Err( p_vout, "cannot open vout, aborting" );
 163         return VLC_EGENERIC;
 164     }
 165
 166 #define VIS_ZOOM 4
 167     p_vout->p_sys->i_x = 0;
 168     p_vout->p_sys->i_y = 0;
 169 #define ZOOM_FACTOR 8
 170     p_vout->p_sys->i_zoom = 2*ZOOM_FACTOR;
 171     p_vout->p_sys->b_visible = true;
 172
 173     var_AddCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout );
 174     var_AddCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout );
 175     var_AddCallback( p_vout->p_sys->p_vout, "mouse-clicked",
 176                      MouseEvent, p_vout);
 177
 178     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 179     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 180     ADD_PARENT_CALLBACKS( SendEventsToChild );
 181
 182     return VLC_SUCCESS;
 183 }
 184
 185 /*****************************************************************************
 186  * End: terminate Magnify video thread output method
 187  *****************************************************************************/
 188 static void End( vout_thread_t *p_vout )
 189 {
 190     int i_index;
 191
 192     /* Free the fake output buffers we allocated */
 193     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 194     {
 195         i_index--;
 196         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 197     }
 198
 199     var_DelCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
 200     var_DelCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
 201     var_DelCallback( p_vout->p_sys->p_vout, "mouse-clicked", MouseEvent, p_vout);
 202 }
 203
 204 /*****************************************************************************
 205  * Destroy: destroy Magnify video thread output method
 206  *****************************************************************************/
 207 static void Destroy( vlc_object_t *p_this )
 208 {
 209     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 210
 211     if( p_vout->p_sys->p_vout )
 212     {
 213         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 214         vlc_object_detach( p_vout->p_sys->p_vout );
 215         vlc_object_release( p_vout->p_sys->p_vout );
 216     }
 217
 218     image_HandlerDelete( p_vout->p_sys->p_image );
 219
 220     DEL_PARENT_CALLBACKS( SendEventsToChild );
 221
 222     free( p_vout->p_sys );
 223 }
 224
 225 /*****************************************************************************
 226  * Render: displays previously rendered output
 227  *****************************************************************************/
 228 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 229 {
 230     picture_t *p_outpic;
 231
 232     int o_x = p_vout->p_sys->i_x;
 233     int o_y = p_vout->p_sys->i_y;
 234     int o_zoom = p_vout->p_sys->i_zoom;
 235     int x,y,o_yp,o_xp;
 236     int v_w, v_h;
 237     video_format_t fmt_out;
 238     picture_t *p_converted;
 239     plane_t *p_oyp=NULL;
 240     int i_plane;
 241
 242     memset( &fmt_out, 0, sizeof(video_format_t) );
 243     /* This is a new frame. Get a structure from the video_output. */
 244     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 245               == NULL )
 246     {
 247         if( p_vout->b_die || p_vout->b_error )
 248         {
 249             return;
 250         }
 251         msleep( VOUT_OUTMEM_SLEEP );
 252     }
 253
 254     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 255
 256     p_oyp = &(p_outpic->p[Y_PLANE]);
 257
 258     /* background magnified image */
 259     if( o_zoom != ZOOM_FACTOR )
 260     {
 261         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 262         {
 263             o_yp = o_y*p_outpic->p[i_plane].i_lines
 264                    /p_outpic->p[Y_PLANE].i_lines;
 265             o_xp = o_x*p_outpic->p[i_plane].i_pitch
 266                    /p_outpic->p[Y_PLANE].i_pitch;
 267             int i_pitch = p_outpic->p[i_plane].i_pitch;
 268 #if 0
 269             int o_zoom2 = o_zoom*o_zoom;
 270             int o_zoom3 = o_zoom*o_zoom*o_zoom;
 271             int o_zoom4 = o_zoom*o_zoom*o_zoom*o_zoom;
 272             int o_zoom6 = o_zoom*o_zoom*o_zoom * o_zoom*o_zoom*o_zoom;
 273 #endif
 274             for( y=0; y<p_outpic->p[i_plane].i_visible_lines; y++ )
 275             {
 276                 for( x=0; x<p_outpic->p[i_plane].i_visible_pitch; x++ )
 277                 {
 278 #if 0
 279                     /* Nearest neighbor */
 280                     int nx = o_xp + x*ZOOM_FACTOR/o_zoom;
 281                     int ny = o_yp + y*ZOOM_FACTOR/o_zoom;
 282                     p_outpic->p[i_plane].p_pixels[y*i_pitch+x] =
 283                         p_pic->p[i_plane].p_pixels[ny*i_pitch+nx];
 284 #elif 1
 285                     /* Bi-linear */
 286                     int nx_real = o_xp*o_zoom + x*ZOOM_FACTOR;
 287                     int ny_real = o_yp*o_zoom + y*ZOOM_FACTOR;
 288                     int nx = nx_real/o_zoom;
 289                     int ny = ny_real/o_zoom;
 290                     int wtl = ((nx+1)*o_zoom-nx_real)*((ny+1)*o_zoom-ny_real);
 291                     int wtr = (nx_real-nx*o_zoom)*((ny+1)*o_zoom-ny_real);
 292                     int wbl = ((nx+1)*o_zoom-nx_real)*(ny_real-ny*o_zoom);
 293                     int wbr = (nx_real-nx*o_zoom)*(ny_real-ny*o_zoom);
 294                     p_outpic->p[i_plane].p_pixels[y*i_pitch+x] =
 295                         ( wtl*p_pic->p[i_plane].p_pixels[ny*i_pitch+nx]
 296                         + wtr*p_pic->p[i_plane].p_pixels[ny*i_pitch+(nx+1)]
 297                         + wbl*p_pic->p[i_plane].p_pixels[(ny+1)*i_pitch+nx]
 298                         + wbr*p_pic->p[i_plane].p_pixels[(ny+1)*i_pitch+(nx+1)]
 299                         ) / (o_zoom*o_zoom);
 300 #else
 301                     /* Bi-cubic */
 302                     /* FIXME: doesn't work */
 303                     /* \Sigma_{i=0..3} \Sigma_{j=0..3} \alpha_{i,j} x^i y^j
 304                      * 16 \alpha_{i,j} so we need to use the 16 nearest pixels
 305                      *
 306                      * In fact we should be able to write it as:
 307                      * \Pi_{i=1..16} [ \Pi_{j!=i} ( x - x_j ) * ( y - y_j ) ]
 308                      *   * z_i / [ \Pi_{j!=i} ( x_i - x_j ) * ( y_i - y_j ) ]
 309                      * We also have to make sure that we don't use any
 310                      * x_j == x_i or y_j == y_i in the \Pi on j (else we get
 311                      * a 0/0 which kind of sucks) .
 312                      */
 313                     uint8_t *p = p_pic->p[i_plane].p_pixels;
 314                     int nx_real = o_xp*o_zoom + x*ZOOM_FACTOR;
 315                     int ny_real = o_yp*o_zoom + y*ZOOM_FACTOR;
 316
 317                     int nx = nx_real/o_zoom;
 318                     int ny = ny_real/o_zoom;
 319
 320                     int xi, yi, xj, yj;
 321                     int my = __MAX( ny-1, 0 );
 322                     int mx = __MAX( nx-1, 0 );
 323                     //p_outpic->p[i_plane].i_visible_lines - 4
 324                     //p_outpic->p[i_plane].i_visible_pitch - 4
 325                     int v = 1;
 326                     for( yi = my; yi <= my+3; yi++ )
 327                     {
 328                         int numy = 1;
 329                         int deny = 1;
 330                         /*
 331                         for( yj = my; yj <= my+3; yj++ )
 332                         {
 333                             if( yj != yi )
 334                             {
 335                                 numy *= (ny_real-yj*o_zoom);
 336                                 deny *= (yi - yj);
 337                             }
 338                         }
 339                         numy /= o_zoom2;*/
 340                         for( xi = mx; xi <= mx+3; xi++ )
 341                         {
 342                             int num = numy;
 343                             int den = deny;
 344                             for( xj = mx; xj <= mx+3; xj++ )
 345                             {
 346                                 if( xj != xi )
 347                                 {
 348                                     num *= (nx_real-xj*o_zoom);
 349                                     den *= (xi - xj);
 350                                 }
 351                             }
 352                             v = ( v * (p[yi*i_pitch+xi] * num) ) / ( den * o_zoom3 );
 353                         }
 354                     }
 355                     p_outpic->p[i_plane].p_pixels[y*i_pitch+x] = v;
 356 #endif
 357                 }
 358             }
 359         }
 360     }
 361     else
 362     {
 363         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 364         {
 365         vlc_memcpy( p_outpic->p[i_plane].p_pixels, p_pic->p[i_plane].p_pixels,
 366             p_outpic->p[i_plane].i_lines * p_outpic->p[i_plane].i_pitch );
 367         }
 368     }
 369
 370     if( p_vout->p_sys->b_visible )
 371     {
 372         /* image visualization */
 373         fmt_out = p_vout->fmt_out;
 374         fmt_out.i_width = p_vout->render.i_width/VIS_ZOOM;
 375         fmt_out.i_height = p_vout->render.i_height/VIS_ZOOM;
 376         p_converted = image_Convert( p_vout->p_sys->p_image, p_pic,
 377                                      &(p_pic->format), &fmt_out );
 378         for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 379         {
 380             for( y=0; y<p_converted->p[i_plane].i_visible_lines; y++)
 381             {
 382                 vlc_memcpy(
 383                 p_outpic->p[i_plane].p_pixels+y*p_outpic->p[i_plane].i_pitch,
 384                 p_converted->p[i_plane].p_pixels+y*p_converted->p[i_plane].i_pitch,
 385                 p_converted->p[i_plane].i_visible_pitch );
 386             }
 387         }
 388         p_converted->pf_release( p_converted );
 389
 390         /* white rectangle on visualization */
 391         v_w = p_oyp->i_pitch*ZOOM_FACTOR/(VIS_ZOOM*o_zoom);
 392         v_h = (o_y+p_oyp->i_lines*ZOOM_FACTOR/o_zoom)/VIS_ZOOM;
 393         /* top line */
 394         vlc_memset( p_oyp->p_pixels
 395                                      + o_y/VIS_ZOOM*p_oyp->i_pitch
 396                                      + o_x/VIS_ZOOM, 0xff, v_w+1 );
 397
 398         for( y = o_y/VIS_ZOOM+1; y < v_h; y++ )
 399         {
 400             /* left line */
 401             p_oyp->p_pixels[
 402                 y*p_oyp->i_pitch+o_x/VIS_ZOOM
 403             ] = 0xff;
 404             /* right line */
 405             p_oyp->p_pixels[
 406                 y*p_oyp->i_pitch+o_x/VIS_ZOOM + v_w
 407             ] = 0xff;
 408         }
 409         /* bottom line */
 410         vlc_memset( p_oyp->p_pixels
 411                                      + v_h*p_oyp->i_pitch
 412                                      + o_x/VIS_ZOOM, 0xff, v_w+1 );
 413
 414         /* */
 415         v_h = p_oyp->i_lines/VIS_ZOOM;
 416     }
 417     else
 418     {
 419         v_h = 1;
 420     }
 421
 422     /* print a small "VLC ZOOM" ... gruikkkkkkkkk */
 423 #define DRAW(a) {int c,l=1;L a;}
 424 #define L ;l++,c=1
 425 #define X ;draw(l,c);c+=1
 426 #define o +1
 427 #define draw(y,x) p_oyp->p_pixels[(v_h+y)*p_oyp->i_pitch+x] = 0xff;
 428 if( p_vout->p_sys->b_visible )
 429 DRAW(
 430 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
 431 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
 432 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
 433 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
 434 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
 435 )
 436 else
 437 DRAW(
 438 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
 439 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
 440 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
 441 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
 442 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
 443 )
 444 #undef DRAW
 445 #undef L
 446 #undef X
 447 #undef O
 448 #undef draw
 449
 450     if( p_vout->p_sys->b_visible )
 451     {
 452         /* zoom gauge */
 453         vlc_memset( p_oyp->p_pixels + (v_h+9)*p_oyp->i_pitch, 0xff, 41 );
 454         for( y = v_h + 10; y < v_h + 90; y++ )
 455         {
 456             int width = v_h + 90 - y;
 457             width = (width*width)/160;
 458             if( (80 - y + v_h)*ZOOM_FACTOR/10 < o_zoom )
 459             {
 460                 vlc_memset( p_oyp->p_pixels + y*p_oyp->i_pitch, 0xff, width );
 461             }
 462             else
 463             {
 464                 p_oyp->p_pixels[y*p_oyp->i_pitch] = 0xff;
 465                 p_oyp->p_pixels[y*p_oyp->i_pitch + width - 1] = 0xff;
 466             }
 467         }
 468     }
 469
 470     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 471 }
 472
 473 /*****************************************************************************
 474  * SendEvents: forward mouse and keyboard events to the parent p_vout
 475  *****************************************************************************/
 476 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 477                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 478 {
 479     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 480     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 481
 482     return VLC_SUCCESS;
 483 }
 484
 485 /*****************************************************************************
 486  * SendEventsToChild: forward events to the child/children vout
 487  *****************************************************************************/
 488 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 489                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 490 {
 491     VLC_UNUSED(p_data); VLC_UNUSED(oldval);
 492     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 493     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 494     return VLC_SUCCESS;
 495 }
 496
 497 /*****************************************************************************
 498  * MouseEvent: callback for mouse events
 499  *****************************************************************************/
 500 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
 501                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 502 {
 503     VLC_UNUSED(p_this);
 504     vout_thread_t *p_vout = (vout_thread_t*)p_data;
 505     vlc_value_t vald,valx,valy;
 506
 507 #define MOUSE_DOWN    1
 508 #define MOUSE_CLICKED 2
 509 #define MOUSE_MOVE_X  4
 510 #define MOUSE_MOVE_Y  8
 511 #define MOUSE_MOVE    12
 512     uint8_t mouse= 0;
 513
 514     int v_h = p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 515     int v_w = p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 516
 517     if( psz_var[6] == 'x' ) mouse |= MOUSE_MOVE_X;
 518     if( psz_var[6] == 'y' ) mouse |= MOUSE_MOVE_Y;
 519     if( psz_var[6] == 'c' ) mouse |= MOUSE_CLICKED;
 520
 521     var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &vald );
 522     if( vald.i_int & 0x1 ) mouse |= MOUSE_DOWN;
 523     var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
 524     var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );
 525
 526     if( ( mouse&MOUSE_MOVE && mouse&MOUSE_DOWN)
 527         || mouse&MOUSE_CLICKED )
 528     {
 529     /* (mouse moved and mouse button is down) or (mouse clicked) */
 530         if( p_vout->p_sys->b_visible )
 531         {
 532             if(    0 <= valy.i_int
 533                 && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM
 534                 && 0 <= valx.i_int
 535                 && valx.i_int < (int)p_vout->output.i_width/VIS_ZOOM )
 536             {
 537             /* mouse is over visualisation */
 538                 p_vout->p_sys->i_x = __MIN( __MAX( valx.i_int*VIS_ZOOM - v_w/2, 0 ),
 539                                             p_vout->output.i_width - v_w - 1);
 540                 p_vout->p_sys->i_y = __MIN( __MAX( valy.i_int * VIS_ZOOM - v_h/2,
 541                                         0 ), p_vout->output.i_height - v_h - 1);
 542             }
 543             else if( valx.i_int >= 0 && valx.i_int < 80
 544                 && valy.i_int >= (int)p_vout->output.i_height/VIS_ZOOM
 545                 && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM + 9
 546                 && mouse&MOUSE_CLICKED )
 547             {
 548             /* mouse is over the "VLC ZOOM HIDE" text */
 549                 p_vout->p_sys->b_visible = false;
 550             }
 551             else if(    (int)p_vout->output.i_height/VIS_ZOOM + 9 <= valy.i_int
 552                      && valy.i_int <= (int)p_vout->output.i_height/VIS_ZOOM + 90
 553                      && 0 <= valx.i_int
 554                      && valx.i_int <=
 555                      (( (int)p_vout->output.i_height/VIS_ZOOM + 90 -  valy.i_int)
 556                *( (int)p_vout->output.i_height/VIS_ZOOM + 90 -  valy.i_int))/160 )
 557             {
 558             /* mouse is over zoom gauge */
 559                 p_vout->p_sys->i_zoom = __MAX( ZOOM_FACTOR,
 560                                 ( 80 + (int)p_vout->output.i_height/VIS_ZOOM
 561                                    - valy.i_int + 2) * ZOOM_FACTOR/10 );
 562             }
 563             else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
 564             {
 565                 p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
 566                                       *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 567             }
 568             else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
 569             {
 570                 p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
 571                                       *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 572             }
 573         }
 574         else
 575         {
 576             if( valx.i_int >= 0 && valx.i_int < 80 && valy.i_int >= 0
 577                 && valy.i_int <= 10 && mouse&MOUSE_CLICKED )
 578             {
 579             /* mouse is over the "VLC ZOOM SHOW" text */
 580                 p_vout->p_sys->b_visible = true;
 581             }
 582             else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
 583             {
 584                 p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
 585                                       *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 586             }
 587             else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
 588             {
 589                 p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
 590                                       *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
 591             }
 592         }
 593     }
 594
 595     p_vout->p_sys->i_x =
 596          __MAX( 0, __MIN( p_vout->p_sys->i_x, (int)p_vout->output.i_width
 597          - (int)p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));
 598     p_vout->p_sys->i_y =
 599          __MAX( 0, __MIN( p_vout->p_sys->i_y, (int)p_vout->output.i_height
 600         - (int)p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));
 601
 602
 603     return VLC_SUCCESS;
 604 }