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

   1 /*****************************************************************************
   2  * crop.c : Crop video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002, 2003 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          mod by Cedric Cocquebert <Cedric.Cocquebert@supelec.fr>
   9  *          based of DScaler idea (M. Samblanet)
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include <stdlib.h>                                      /* malloc(), free() */
  30 #include <string.h>
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc_vout.h>
  34 #include <vlc_interface.h>
  35
  36 #include "filter_common.h"
  37
  38 #define BEST_AUTOCROP 1
  39 #ifdef BEST_AUTOCROP
  40     #define RATIO_MAX 15000  // 10*4/3 for a 360°
  41 #endif
  42
  43 /*****************************************************************************
  44  * Local prototypes
  45  *****************************************************************************/
  46 static int  Create    ( vlc_object_t * );
  47 static void Destroy   ( vlc_object_t * );
  48
  49 static int  Init      ( vout_thread_t * );
  50 static void End       ( vout_thread_t * );
  51 static int  Manage    ( vout_thread_t * );
  52 static void Render    ( vout_thread_t *, picture_t * );
  53
  54 static void UpdateStats    ( vout_thread_t *, picture_t * );
  55
  56 static int  SendEvents( vlc_object_t *, char const *,
  57                         vlc_value_t, vlc_value_t, void * );
  58
  59 #ifdef BEST_AUTOCROP
  60 /*****************************************************************************
  61  * Callback prototypes
  62  *****************************************************************************/
  63 static int FilterCallback ( vlc_object_t *, char const *,
  64                             vlc_value_t, vlc_value_t, void * );
  65 #endif
  66
  67 /*****************************************************************************
  68  * Module descriptor
  69  *****************************************************************************/
  70 #define GEOMETRY_TEXT N_("Crop geometry (pixels)")
  71 #define GEOMETRY_LONGTEXT N_("Set the geometry of the zone to crop. This is set as <width> x <height> + <left offset> + <top offset>.")
  72
  73 #define AUTOCROP_TEXT N_("Automatic cropping")
  74 #define AUTOCROP_LONGTEXT N_("Automatically detect black borders and crop them.")
  75
  76 #ifdef BEST_AUTOCROP
  77 #define RATIOMAX_TEXT N_("Ratio max (x 1000)")
  78 #define RATIOMAX_LONGTEXT N_("Maximum image ratio. The crop plugin will never automatically crop to a higher ratio (ie, to a more \"flat\" image). The value is x1000: 1333 means 4/3.")
  79
  80 #define RATIO_TEXT N_("Manual ratio")
  81 #define RATIO_LONGTEXT N_("Force a ratio (0 for automatic). Value is x1000: 1333 means 4/3.")
  82
  83 #define TIME_TEXT N_("Number of images for change")
  84 #define TIME_LONGTEXT N_("The number of consecutive images with the same detected ratio (different from the previously detected ratio) to consider that ratio chnged and trigger recrop.")
  85
  86 #define DIFF_TEXT N_("Number of lines for change")
  87 #define DIFF_LONGTEXT N_("The minimum difference in the number of detected black lines to consider that ratio changed and trigger recrop.")
  88
  89 #define NBP_TEXT N_("Number of non black pixels ")
  90 #define NBP_LONGTEXT N_("The maximum of non-black pixels in a line to consider"\
  91                         " that the line is black.")
  92
  93 #define SKIP_TEXT N_("Skip percentage (%)")
  94 #define SKIP_LONGTEXT N_("Percentage of the line to consider while checking for black lines. This allows to skip logos in black borders and crop them anyway.")
  95
  96 #define LUM_TEXT N_("Luminance threshold ")
  97 #define LUM_LONGTEXT N_("Maximum luminance to consider a pixel as black (0-255).")
  98 #endif
  99
 100 vlc_module_begin();
 101     set_description( _("Crop video filter") );
 102     set_shortname( _("Crop" ));
 103     set_category( CAT_VIDEO );
 104     set_subcategory( SUBCAT_VIDEO_VFILTER );
 105     set_capability( "video filter", 0 );
 106
 107     add_string( "crop-geometry", NULL, NULL, GEOMETRY_TEXT,
 108                                              GEOMETRY_LONGTEXT, VLC_FALSE );
 109     add_bool( "autocrop", 0, NULL, AUTOCROP_TEXT,
 110                                    AUTOCROP_LONGTEXT, VLC_FALSE );
 111
 112 #ifdef BEST_AUTOCROP
 113     add_integer_with_range( "autocrop-ratio-max", 2405, 0, RATIO_MAX, NULL,
 114                             RATIOMAX_TEXT, RATIOMAX_LONGTEXT, VLC_TRUE );
 115
 116     add_integer_with_range( "crop-ratio", 0, 0, RATIO_MAX, NULL, RATIO_TEXT,
 117                             RATIO_LONGTEXT, VLC_FALSE );
 118     add_integer( "autocrop-time", 25, NULL, TIME_TEXT,
 119                  TIME_LONGTEXT, VLC_TRUE );
 120     add_integer( "autocrop-diff", 16, NULL, DIFF_TEXT,
 121                                             DIFF_LONGTEXT, VLC_TRUE );
 122
 123     add_integer( "autocrop-non-black-pixels", 3, NULL,
 124                  NBP_TEXT, NBP_LONGTEXT, VLC_TRUE );
 125
 126     add_integer_with_range( "autocrop-skip-percent", 17, 0, 100, NULL,
 127                             SKIP_TEXT, SKIP_LONGTEXT, VLC_TRUE );
 128
 129     add_integer_with_range( "autocrop-luminance-threshold", 40, 0, 128, NULL,
 130                             LUM_TEXT, LUM_LONGTEXT, VLC_TRUE );
 131 #endif //BEST_AUTOCROP
 132
 133     add_shortcut( "crop" );
 134     set_callbacks( Create, Destroy );
 135 vlc_module_end();
 136
 137 /*****************************************************************************
 138  * vout_sys_t: Crop video output method descriptor
 139  *****************************************************************************
 140  * This structure is part of the video output thread descriptor.
 141  * It describes the Crop specific properties of an output thread.
 142  *****************************************************************************/
 143 struct vout_sys_t
 144 {
 145     vout_thread_t *p_vout;
 146
 147     unsigned int i_x, i_y;
 148     unsigned int i_width, i_height, i_aspect;
 149
 150     vlc_bool_t b_autocrop;
 151
 152     /* Autocrop specific variables */
 153     unsigned int i_lastchange;
 154     vlc_bool_t   b_changed;
 155 #ifdef BEST_AUTOCROP
 156     unsigned int i_ratio_max;
 157     unsigned int i_threshold, i_skipPercent, i_nonBlackPixel, i_diff, i_time;
 158     unsigned int i_ratio;
 159 #endif
 160
 161 };
 162
 163 /*****************************************************************************
 164  * Control: control facility for the vout (forwards to child vout)
 165  *****************************************************************************/
 166 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 167 {
 168     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 169 }
 170
 171 /*****************************************************************************
 172  * Create: allocates Crop video thread output method
 173  *****************************************************************************
 174  * This function allocates and initializes a Crop vout method.
 175  *****************************************************************************/
 176 static int Create( vlc_object_t *p_this )
 177 {
 178     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 179
 180     /* Allocate structure */
 181     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 182     if( p_vout->p_sys == NULL )
 183     {
 184         msg_Err( p_vout, "out of memory" );
 185         return VLC_ENOMEM;
 186     }
 187
 188     p_vout->pf_init = Init;
 189     p_vout->pf_end = End;
 190     p_vout->pf_manage = Manage;
 191     p_vout->pf_render = Render;
 192     p_vout->pf_display = NULL;
 193     p_vout->pf_control = Control;
 194
 195     return VLC_SUCCESS;
 196 }
 197
 198 /*****************************************************************************
 199  * Init: initialize Crop video thread output method
 200  *****************************************************************************/
 201 static int Init( vout_thread_t *p_vout )
 202 {
 203     int   i_index;
 204     char *psz_var;
 205     picture_t *p_pic;
 206     video_format_t fmt = {0};
 207
 208     I_OUTPUTPICTURES = 0;
 209
 210     p_vout->p_sys->i_lastchange = 0;
 211     p_vout->p_sys->b_changed = VLC_FALSE;
 212
 213     /* Initialize the output structure */
 214     p_vout->output.i_chroma = p_vout->render.i_chroma;
 215     p_vout->output.i_width  = p_vout->render.i_width;
 216     p_vout->output.i_height = p_vout->render.i_height;
 217     p_vout->output.i_aspect = p_vout->render.i_aspect;
 218     p_vout->fmt_out = p_vout->fmt_in;
 219
 220     /* Shall we use autocrop ? */
 221     p_vout->p_sys->b_autocrop = config_GetInt( p_vout, "autocrop" );
 222 #ifdef BEST_AUTOCROP
 223     p_vout->p_sys->i_ratio_max = config_GetInt( p_vout, "autocrop-ratio-max" );
 224     p_vout->p_sys->i_threshold =
 225                     config_GetInt( p_vout, "autocrop-luminance-threshold" );
 226     p_vout->p_sys->i_skipPercent =
 227                     config_GetInt( p_vout, "autocrop-skip-percent" );
 228     p_vout->p_sys->i_nonBlackPixel =
 229                     config_GetInt( p_vout, "autocrop-non-black-pixels" );
 230     p_vout->p_sys->i_diff = config_GetInt( p_vout, "autocrop-diff" );
 231     p_vout->p_sys->i_time = config_GetInt( p_vout, "autocrop-time" );
 232     vlc_value_t val={0};
 233     var_Get( p_vout, "ratio-crop", &val );
 234     val.psz_string = "0";
 235     var_SetString( p_vout, "ratio-crop", val.psz_string);
 236
 237     if (p_vout->p_sys->b_autocrop)
 238         p_vout->p_sys->i_ratio = 0;
 239     else
 240     {
 241         p_vout->p_sys->i_ratio = config_GetInt( p_vout, "ratio" );
 242         // ratio < width / height => ratio = 0 (unchange ratio)
 243         if (p_vout->p_sys->i_ratio < (p_vout->output.i_width * 1000) / p_vout->output.i_height)
 244             p_vout->p_sys->i_ratio = 0;
 245     }
 246 #endif
 247
 248
 249     /* Get geometry value from the user */
 250     psz_var = config_GetPsz( p_vout, "crop-geometry" );
 251     if( psz_var )
 252     {
 253         char *psz_parser, *psz_tmp;
 254
 255         psz_parser = psz_tmp = psz_var;
 256         while( *psz_tmp && *psz_tmp != 'x' ) psz_tmp++;
 257
 258         if( *psz_tmp )
 259         {
 260             psz_tmp[0] = '\0';
 261             p_vout->p_sys->i_width = atoi( psz_parser );
 262
 263             psz_parser = ++psz_tmp;
 264             while( *psz_tmp && *psz_tmp != '+' ) psz_tmp++;
 265
 266             if( *psz_tmp )
 267             {
 268                 psz_tmp[0] = '\0';
 269                 p_vout->p_sys->i_height = atoi( psz_parser );
 270
 271                 psz_parser = ++psz_tmp;
 272                 while( *psz_tmp && *psz_tmp != '+' ) psz_tmp++;
 273
 274                 if( *psz_tmp )
 275                 {
 276                     psz_tmp[0] = '\0';
 277                     p_vout->p_sys->i_x = atoi( psz_parser );
 278                     p_vout->p_sys->i_y = atoi( ++psz_tmp );
 279                 }
 280                 else
 281                 {
 282                     p_vout->p_sys->i_x = atoi( psz_parser );
 283                     p_vout->p_sys->i_y =
 284                      ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
 285                 }
 286             }
 287             else
 288             {
 289                 p_vout->p_sys->i_height = atoi( psz_parser );
 290                 p_vout->p_sys->i_x =
 291                      ( p_vout->output.i_width - p_vout->p_sys->i_width ) / 2;
 292                 p_vout->p_sys->i_y =
 293                      ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
 294             }
 295         }
 296         else
 297         {
 298             p_vout->p_sys->i_width = atoi( psz_parser );
 299             p_vout->p_sys->i_height = p_vout->output.i_height;
 300             p_vout->p_sys->i_x =
 301                      ( p_vout->output.i_width - p_vout->p_sys->i_width ) / 2;
 302             p_vout->p_sys->i_y =
 303                      ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
 304         }
 305
 306         /* Check for validity */
 307         if( p_vout->p_sys->i_x + p_vout->p_sys->i_width
 308                                                    > p_vout->output.i_width )
 309         {
 310             p_vout->p_sys->i_x = 0;
 311             if( p_vout->p_sys->i_width > p_vout->output.i_width )
 312             {
 313                 p_vout->p_sys->i_width = p_vout->output.i_width;
 314             }
 315         }
 316
 317         if( p_vout->p_sys->i_y + p_vout->p_sys->i_height
 318                                                    > p_vout->output.i_height )
 319         {
 320             p_vout->p_sys->i_y = 0;
 321             if( p_vout->p_sys->i_height > p_vout->output.i_height )
 322             {
 323                 p_vout->p_sys->i_height = p_vout->output.i_height;
 324             }
 325         }
 326
 327         free( psz_var );
 328     }
 329     else
 330 #ifdef BEST_AUTOCROP
 331     if (p_vout->p_sys->i_ratio)
 332     {
 333         p_vout->p_sys->i_aspect    =  p_vout->p_sys->i_ratio * 432;
 334         p_vout->p_sys->i_width  = p_vout->fmt_out.i_visible_width;
 335         p_vout->p_sys->i_height = p_vout->output.i_aspect
 336                                 * p_vout->output.i_height / p_vout->p_sys->i_aspect
 337                                 * p_vout->p_sys->i_width / p_vout->output.i_width;
 338         p_vout->p_sys->i_height += p_vout->p_sys->i_height % 2;
 339         p_vout->p_sys->i_x = p_vout->fmt_out.i_x_offset;
 340         p_vout->p_sys->i_y = (p_vout->output.i_height - p_vout->p_sys->i_height) / 2;
 341     }
 342     else
 343 #endif
 344     {
 345         p_vout->p_sys->i_width  = p_vout->fmt_out.i_visible_width;
 346         p_vout->p_sys->i_height = p_vout->fmt_out.i_visible_height;
 347         p_vout->p_sys->i_x = p_vout->fmt_out.i_x_offset;
 348         p_vout->p_sys->i_y = p_vout->fmt_out.i_y_offset;
 349     }
 350
 351     /* Pheeew. Parsing done. */
 352     msg_Dbg( p_vout, "cropping at %ix%i+%i+%i, %sautocropping",
 353                      p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 354                      p_vout->p_sys->i_x, p_vout->p_sys->i_y,
 355                      p_vout->p_sys->b_autocrop ? "" : "not " );
 356 #ifdef BEST_AUTOCROP
 357     msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
 358 #endif
 359
 360     /* Set current output image properties */
 361     p_vout->p_sys->i_aspect = p_vout->fmt_out.i_aspect
 362            * p_vout->fmt_out.i_visible_height / p_vout->p_sys->i_height
 363            * p_vout->p_sys->i_width / p_vout->fmt_out.i_visible_width;
 364
 365     fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
 366     fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
 367     fmt.i_x_offset = fmt.i_y_offset = 0;
 368     fmt.i_chroma = p_vout->render.i_chroma;
 369     fmt.i_aspect = p_vout->p_sys->i_aspect;
 370     fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
 371     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 372
 373     /* Try to open the real video output */
 374     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 375     if( p_vout->p_sys->p_vout == NULL )
 376     {
 377         msg_Err( p_vout, "failed to create vout" );
 378         intf_UserFatal( p_vout, VLC_FALSE, _("Cropping failed"),
 379                         _("VLC could not open the video output module.") );
 380         return VLC_EGENERIC;
 381     }
 382
 383     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 384
 385     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 386
 387 #ifdef BEST_AUTOCROP
 388     var_AddCallback( p_vout, "ratio-crop", FilterCallback, NULL );
 389 #endif
 390
 391     ADD_PARENT_CALLBACKS( SendEventsToChild );
 392
 393     return VLC_SUCCESS;
 394 }
 395
 396 /*****************************************************************************
 397  * End: terminate Crop video thread output method
 398  *****************************************************************************/
 399 static void End( vout_thread_t *p_vout )
 400 {
 401     int i_index;
 402
 403     /* Free the fake output buffers we allocated */
 404     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 405     {
 406         i_index--;
 407         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 408     }
 409 }
 410
 411 /*****************************************************************************
 412  * Destroy: destroy Crop video thread output method
 413  *****************************************************************************
 414  * Terminate an output method created by CropCreateOutputMethod
 415  *****************************************************************************/
 416 static void Destroy( vlc_object_t *p_this )
 417 {
 418     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 419
 420     if( p_vout->p_sys->p_vout )
 421     {
 422         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 423         vlc_object_detach( p_vout->p_sys->p_vout );
 424         vout_Destroy( p_vout->p_sys->p_vout );
 425     }
 426
 427     DEL_PARENT_CALLBACKS( SendEventsToChild );
 428
 429     free( p_vout->p_sys );
 430 }
 431
 432 /*****************************************************************************
 433  * Manage: handle Crop events
 434  *****************************************************************************
 435  * This function should be called regularly by video output thread. It manages
 436  * console events. It returns a non null value on error.
 437  *****************************************************************************/
 438 static int Manage( vout_thread_t *p_vout )
 439 {
 440     video_format_t fmt = {0};
 441
 442     if( !p_vout->p_sys->b_changed )
 443     {
 444         return VLC_SUCCESS;
 445     }
 446
 447 #ifdef BEST_AUTOCROP
 448     msg_Dbg( p_vout, "cropping at %ix%i+%i+%i, %sautocropping",
 449                      p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 450                      p_vout->p_sys->i_x, p_vout->p_sys->i_y,
 451                      p_vout->p_sys->b_autocrop ? "" : "not " );
 452
 453     msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
 454 #endif
 455
 456     vout_Destroy( p_vout->p_sys->p_vout );
 457
 458     fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
 459     fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
 460     fmt.i_x_offset = fmt.i_y_offset = 0;
 461     fmt.i_chroma = p_vout->render.i_chroma;
 462     fmt.i_aspect = p_vout->p_sys->i_aspect;
 463     fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
 464     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 465
 466     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 467     if( p_vout->p_sys->p_vout == NULL )
 468     {
 469         msg_Err( p_vout, "failed to create vout" );
 470         intf_UserFatal( p_vout, VLC_FALSE, _("Cropping failed"),
 471                         _("VLC could not open the video output module.") );
 472         return VLC_EGENERIC;
 473     }
 474
 475     p_vout->p_sys->b_changed = VLC_FALSE;
 476     p_vout->p_sys->i_lastchange = 0;
 477
 478     return VLC_SUCCESS;
 479 }
 480
 481 /*****************************************************************************
 482  * Render: display previously rendered output
 483  *****************************************************************************
 484  * This function sends the currently rendered image to Crop image, waits
 485  * until it is displayed and switches the two rendering buffers, preparing next
 486  * frame.
 487  *****************************************************************************/
 488 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 489 {
 490     picture_t *p_outpic = NULL;
 491     int i_plane;
 492
 493     if( p_vout->p_sys->b_changed )
 494     {
 495         return;
 496     }
 497
 498     while( ( p_outpic =
 499                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 )
 500            ) == NULL )
 501     {
 502         if( p_vout->b_die || p_vout->b_error )
 503         {
 504             vout_DestroyPicture( p_vout->p_sys->p_vout, p_outpic );
 505             return;
 506         }
 507
 508         msleep( VOUT_OUTMEM_SLEEP );
 509     }
 510
 511     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 512     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 513
 514     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 515     {
 516         uint8_t *p_in, *p_out, *p_out_end;
 517         int i_in_pitch = p_pic->p[i_plane].i_pitch;
 518         const int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 519         const int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 520
 521         p_in = p_pic->p[i_plane].p_pixels
 522                 /* Skip the right amount of lines */
 523                 + i_in_pitch * ( p_pic->p[i_plane].i_visible_lines *
 524                                  p_vout->p_sys->i_y / p_vout->output.i_height )
 525                 /* Skip the right amount of columns */
 526                 + i_in_pitch * p_vout->p_sys->i_x / p_vout->output.i_width;
 527
 528         p_out = p_outpic->p[i_plane].p_pixels;
 529         p_out_end = p_out + i_out_pitch * p_outpic->p[i_plane].i_visible_lines;
 530
 531         while( p_out < p_out_end )
 532         {
 533             p_vout->p_libvlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 534             p_in += i_in_pitch;
 535             p_out += i_out_pitch;
 536         }
 537     }
 538
 539     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 540     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 541
 542     /* The source image may still be in the cache ... parse it! */
 543     if( p_vout->p_sys->b_autocrop )
 544     {
 545         UpdateStats( p_vout, p_pic );
 546     }
 547 }
 548
 549 #ifdef BEST_AUTOCROP
 550 static vlc_bool_t NonBlackLine(uint8_t *p_in, int i_line, int i_pitch,
 551                                int i_visible_pitch, int i_lines,
 552                                int i_lumThreshold, int i_skipCountPercent,
 553                                int i_nonBlackPixel, int i_chroma)
 554 {
 555     const int i_col = i_line * i_pitch / i_lines;
 556     int i_index, i_count = 0;
 557     int i_skipCount = 0;
 558
 559     switch(i_chroma)
 560     {
 561     // planar YUV
 562         case VLC_FOURCC('I','4','4','4'):
 563         case VLC_FOURCC('I','4','2','2'):
 564         case VLC_FOURCC('I','4','2','0'):
 565         case VLC_FOURCC('Y','V','1','2'):
 566         case VLC_FOURCC('I','Y','U','V'):
 567         case VLC_FOURCC('I','4','1','1'):
 568         case VLC_FOURCC('I','4','1','0'):
 569         case VLC_FOURCC('Y','V','U','9'):
 570         case VLC_FOURCC('Y','U','V','A'):
 571             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 572             for (i_index = i_col/2 + i_skipCount/2;
 573                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 574                  i_index++)
 575             {
 576                  i_count += (p_in[i_index] > i_lumThreshold);
 577             if (i_count > i_nonBlackPixel) break;
 578             }
 579             break;
 580     // packed RGB
 581         case VLC_FOURCC('R','G','B','2'):    // packed by 1
 582             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 583             for (i_index = i_col/2 + i_skipCount/2;
 584                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 585                  i_index++)
 586             {
 587                  i_count += (p_in[i_index] > i_lumThreshold);
 588             if (i_count > i_nonBlackPixel) break;
 589             }
 590             break;
 591         case VLC_FOURCC('R','V','1','5'):    // packed by 2
 592         case VLC_FOURCC('R','V','1','6'):    // packed by 2
 593             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 594             for (i_index = i_col/2 + i_skipCount/2 -
 595                                 (i_col/2 + i_skipCount/2) % 2;
 596                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 597                  i_index+=2)
 598             {
 599                  i_count += (p_in[i_index] > i_lumThreshold) &&
 600                             (p_in[i_index + 1] > i_lumThreshold);
 601             if (i_count > i_nonBlackPixel) break;
 602             }
 603             break;
 604         case VLC_FOURCC('R','V','2','4'):    // packed by 3
 605             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 606             for (i_index = i_col/2 + i_skipCount/2 - (i_col/2 + i_skipCount/2) % 3; i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2; i_index+=3)
 607             {
 608                  i_count += (p_in[i_index] > i_lumThreshold) &&
 609                             (p_in[i_index + 1] > i_lumThreshold) &&
 610                             (p_in[i_index + 2] > i_lumThreshold);
 611             if (i_count > i_nonBlackPixel) break;
 612             }
 613             break;
 614         case VLC_FOURCC('R','V','3','2'):    // packed by 4
 615             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 616             for (i_index = i_col/2 + i_skipCount/2 - (i_col/2 + i_skipCount/2) % 4; i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2; i_index+=4)
 617             {
 618                  i_count += (uint32_t)(*(p_in + i_index)) > (uint32_t)i_lumThreshold;
 619             if (i_count > i_nonBlackPixel) break;
 620             }
 621             break;
 622     // packed YUV
 623         case VLC_FOURCC('Y','U','Y','2'):    // packed by 2
 624         case VLC_FOURCC('Y','U','N','V'):    // packed by 2
 625         case VLC_FOURCC('U','Y','V','Y'):    // packed by 2
 626         case VLC_FOURCC('U','Y','N','V'):    // packed by 2
 627         case VLC_FOURCC('Y','4','2','2'):    // packed by 2
 628             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 629             for (i_index = (i_col/2 + i_skipCount/2) -
 630                            (i_col/2 + i_skipCount/2) % 2;
 631                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 632                  i_index+=2)
 633             {
 634                  i_count += (p_in[i_index] > i_lumThreshold);
 635             if (i_count > i_nonBlackPixel) break;
 636             }
 637             break;
 638         default :
 639             break;
 640     }
 641     return (i_count > i_nonBlackPixel);
 642 }
 643 #endif
 644
 645 static void UpdateStats( vout_thread_t *p_vout, picture_t *p_pic )
 646 {
 647    uint8_t *p_in = p_pic->p[0].p_pixels;
 648     int i_pitch = p_pic->p[0].i_pitch;
 649     int i_visible_pitch = p_pic->p[0].i_visible_pitch;
 650     int i_lines = p_pic->p[0].i_visible_lines;
 651     int i_firstwhite = -1, i_lastwhite = -1, i;
 652 #ifdef BEST_AUTOCROP
 653     int i_time = p_vout->p_sys->i_time;
 654     int i_diff = p_vout->p_sys->i_diff;
 655
 656     if (!p_vout->p_sys->i_ratio)
 657     {
 658         /* Determine where black borders are */
 659         for( i = 0 ; i < i_lines ; i++)
 660         {
 661                    if (NonBlackLine(p_in, i, i_pitch, i_visible_pitch, i_lines,
 662                             p_vout->p_sys->i_threshold,
 663                             p_vout->p_sys->i_skipPercent,
 664                             p_vout->p_sys->i_nonBlackPixel,
 665                             p_vout->output.i_chroma))
 666                 {
 667                     i_firstwhite = i;
 668                     i_lastwhite = i_lines - i;
 669                     break;
 670                 }
 671                 p_in += i_pitch;
 672         }
 673
 674         /* Decide whether it's worth changing the size */
 675         if( i_lastwhite == -1 )
 676         {
 677             p_vout->p_sys->i_lastchange = 0;
 678             return;
 679         }
 680
 681         if( (i_lastwhite - i_firstwhite) < (int) (p_vout->p_sys->i_height / 2) )
 682         {
 683             p_vout->p_sys->i_lastchange = 0;
 684             return;
 685         }
 686
 687         if (p_vout->output.i_aspect
 688                             * p_vout->output.i_height /
 689                                 (i_lastwhite - i_firstwhite + 1)
 690                             * p_vout->p_sys->i_width /
 691                                p_vout->output.i_width >
 692                                     p_vout->p_sys->i_ratio_max * 432)
 693         {
 694             int i_height = ((p_vout->output.i_aspect / 432) *
 695                            p_vout->output.i_height * p_vout->p_sys->i_width) /
 696                           (p_vout->output.i_width * p_vout->p_sys->i_ratio_max);
 697             i_firstwhite = (p_vout->output.i_height - i_height) / 2;
 698             i_lastwhite =  p_vout->output.i_height - i_firstwhite;
 699 /*
 700             p_vout->p_sys->i_lastchange = 0;
 701             return;
 702 */
 703         }
 704
 705         if( (i_lastwhite - i_firstwhite) <
 706                         (int) (p_vout->p_sys->i_height + i_diff)
 707              && (i_lastwhite - i_firstwhite + i_diff) >
 708                         (int) p_vout->p_sys->i_height )
 709         {
 710             p_vout->p_sys->i_lastchange = 0;
 711             return;
 712         }
 713
 714         /* We need at least 'i_time' images to make up our mind */
 715         p_vout->p_sys->i_lastchange++;
 716         if( p_vout->p_sys->i_lastchange < (unsigned int)i_time )
 717         {
 718             return;
 719         }
 720     }
 721     else
 722     {
 723         if ( p_vout->p_sys->i_lastchange >= (unsigned int)i_time )
 724         {
 725             p_vout->p_sys->i_aspect    =  p_vout->p_sys->i_ratio * 432;
 726             int i_height = p_vout->output.i_aspect
 727                                     * p_vout->output.i_height /
 728                                         p_vout->p_sys->i_aspect
 729                                     * p_vout->p_sys->i_width /
 730                                         p_vout->output.i_width;
 731             i_firstwhite = (p_vout->output.i_height - i_height) / 2;
 732             i_lastwhite =  p_vout->output.i_height - i_firstwhite;
 733         }
 734         else
 735         {
 736             return;
 737         }
 738     }
 739
 740 #else
 741     /* Determine where black borders are */
 742     switch( p_vout->output.i_chroma )
 743     {
 744     case VLC_FOURCC('I','4','2','0'):
 745         /* XXX: Do not laugh ! I know this is very naive. But it's just a
 746          *      proof of concept code snippet... */
 747         for( i = i_lines ; i-- ; )
 748         {
 749             const int i_col = i * i_pitch / i_lines;
 750
 751             if( p_in[i_col/2] > 40
 752                  && p_in[i_visible_pitch/2] > 40
 753                  && p_in[i_visible_pitch/2 + i_col/2] > 40 )
 754             {
 755                 if( i_lastwhite == -1 )
 756                 {
 757                     i_lastwhite = i;
 758                 }
 759                 i_firstwhite = i;
 760             }
 761             p_in += i_pitch;
 762         }
 763         break;
 764
 765     default:
 766         break;
 767     }
 768
 769     /* Decide whether it's worth changing the size */
 770     if( i_lastwhite == -1 )
 771     {
 772         p_vout->p_sys->i_lastchange = 0;
 773         return;
 774     }
 775
 776     if( (unsigned int)(i_lastwhite - i_firstwhite)
 777                                            < p_vout->p_sys->i_height / 2 )
 778     {
 779         p_vout->p_sys->i_lastchange = 0;
 780         return;
 781     }
 782
 783     if( (unsigned int)(i_lastwhite - i_firstwhite)
 784                                           < p_vout->p_sys->i_height + 16
 785          && (unsigned int)(i_lastwhite - i_firstwhite + 16)
 786                                                 > p_vout->p_sys->i_height )
 787     {
 788         p_vout->p_sys->i_lastchange = 0;
 789         return;
 790     }
 791
 792     /* We need at least 25 images to make up our mind */
 793     p_vout->p_sys->i_lastchange++;
 794     if( p_vout->p_sys->i_lastchange < 25 )
 795     {
 796         return;
 797     }
 798 #endif //BEST_AUTOCROP
 799
 800     /* Tune a few values */
 801     if( i_firstwhite & 1 )
 802     {
 803         i_firstwhite--;
 804     }
 805
 806     if( !(i_lastwhite & 1) )
 807     {
 808         i_lastwhite++;
 809     }
 810
 811     /* Change size */
 812     p_vout->p_sys->i_y = i_firstwhite;
 813     p_vout->p_sys->i_height = i_lastwhite - i_firstwhite + 1;
 814 #ifdef BEST_AUTOCROP
 815     // check p_vout->p_sys->i_height <= p_vout->output.i_height
 816     if (p_vout->p_sys->i_height > p_vout->output.i_height)
 817         p_vout->p_sys->i_height = p_vout->output.i_height;
 818 #endif
 819
 820     p_vout->p_sys->i_aspect = p_vout->output.i_aspect
 821                             * p_vout->output.i_height / p_vout->p_sys->i_height
 822                             * p_vout->p_sys->i_width / p_vout->output.i_width;
 823
 824     p_vout->p_sys->b_changed = VLC_TRUE;
 825 }
 826
 827 /*****************************************************************************
 828  * SendEvents: forward mouse and keyboard events to the parent p_vout
 829  *****************************************************************************/
 830 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 831                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 832 {
 833     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 834     vlc_value_t sentval = newval;
 835
 836     /* Translate the mouse coordinates */
 837     if( !strcmp( psz_var, "mouse-x" ) )
 838     {
 839         sentval.i_int += p_vout->p_sys->i_x;
 840     }
 841     else if( !strcmp( psz_var, "mouse-y" ) )
 842     {
 843         sentval.i_int += p_vout->p_sys->i_y;
 844     }
 845
 846     var_Set( p_vout, psz_var, sentval );
 847
 848     return VLC_SUCCESS;
 849 }
 850
 851 /*****************************************************************************
 852  * SendEventsToChild: forward events to the child/children vout
 853  *****************************************************************************/
 854 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 855                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 856 {
 857     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 858     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 859     return VLC_SUCCESS;
 860 }
 861
 862 #ifdef BEST_AUTOCROP
 863 /*****************************************************************************
 864  * FilterCallback: called when changing the ratio on the fly.
 865  *****************************************************************************/
 866 static int FilterCallback( vlc_object_t *p_this, char const *psz_var,
 867                            vlc_value_t oldval, vlc_value_t newval,
 868                            void *p_data )
 869 {
 870     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 871
 872     if( !strcmp( psz_var, "ratio-crop" ) )
 873     {
 874         if ( !strcmp( newval.psz_string, "Auto" ) )
 875             p_vout->p_sys->i_ratio = 0;
 876         else
 877         {
 878             p_vout->p_sys->i_ratio = (unsigned int)atoi(newval.psz_string);
 879             p_vout->p_sys->i_lastchange = p_vout->p_sys->i_time;
 880             p_vout->p_sys->b_autocrop = VLC_TRUE;
 881         }
 882         if (p_vout->p_sys->i_ratio)
 883         {
 884             if (p_vout->p_sys->i_ratio < (p_vout->output.i_width * 1000) /
 885                                     p_vout->output.i_height)
 886                 p_vout->p_sys->i_ratio = (p_vout->output.i_width * 1000) /
 887                                     p_vout->output.i_height;
 888             if (p_vout->p_sys->i_ratio < p_vout->output.i_aspect / 432)
 889                 p_vout->p_sys->i_ratio = p_vout->output.i_aspect / 432;
 890         }
 891      }
 892     return VLC_SUCCESS;
 893 }
 894 #endif