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, "crop-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     /* Set current output image properties */
 357     p_vout->p_sys->i_aspect = p_vout->fmt_out.i_aspect
 358            * p_vout->fmt_out.i_visible_height / p_vout->p_sys->i_height
 359            * p_vout->p_sys->i_width / p_vout->fmt_out.i_visible_width;
 360
 361 #ifdef BEST_AUTOCROP
 362     msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
 363 #endif
 364     fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
 365     fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
 366     fmt.i_x_offset = fmt.i_y_offset = 0;
 367     fmt.i_chroma = p_vout->render.i_chroma;
 368     fmt.i_aspect = p_vout->p_sys->i_aspect;
 369     fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
 370     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 371
 372     /* Try to open the real video output */
 373     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 374     if( p_vout->p_sys->p_vout == NULL )
 375     {
 376         msg_Err( p_vout, "failed to create vout" );
 377         intf_UserFatal( p_vout, VLC_FALSE, _("Cropping failed"),
 378                         _("VLC could not open the video output module.") );
 379         return VLC_EGENERIC;
 380     }
 381
 382     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 383
 384     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 385
 386 #ifdef BEST_AUTOCROP
 387     var_AddCallback( p_vout, "ratio-crop", FilterCallback, NULL );
 388 #endif
 389
 390     ADD_PARENT_CALLBACKS( SendEventsToChild );
 391
 392     return VLC_SUCCESS;
 393 }
 394
 395 /*****************************************************************************
 396  * End: terminate Crop video thread output method
 397  *****************************************************************************/
 398 static void End( vout_thread_t *p_vout )
 399 {
 400     int i_index;
 401
 402     /* Free the fake output buffers we allocated */
 403     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 404     {
 405         i_index--;
 406         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 407     }
 408 }
 409
 410 /*****************************************************************************
 411  * Destroy: destroy Crop video thread output method
 412  *****************************************************************************
 413  * Terminate an output method created by CropCreateOutputMethod
 414  *****************************************************************************/
 415 static void Destroy( vlc_object_t *p_this )
 416 {
 417     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 418
 419     if( p_vout->p_sys->p_vout )
 420     {
 421         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 422         vlc_object_detach( p_vout->p_sys->p_vout );
 423         vout_Destroy( p_vout->p_sys->p_vout );
 424     }
 425
 426     DEL_PARENT_CALLBACKS( SendEventsToChild );
 427
 428     free( p_vout->p_sys );
 429 }
 430
 431 /*****************************************************************************
 432  * Manage: handle Crop events
 433  *****************************************************************************
 434  * This function should be called regularly by video output thread. It manages
 435  * console events. It returns a non null value on error.
 436  *****************************************************************************/
 437 static int Manage( vout_thread_t *p_vout )
 438 {
 439     video_format_t fmt = {0};
 440
 441     if( !p_vout->p_sys->b_changed )
 442     {
 443         return VLC_SUCCESS;
 444     }
 445
 446 #ifdef BEST_AUTOCROP
 447     msg_Dbg( p_vout, "cropping at %ix%i+%i+%i, %sautocropping",
 448                      p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 449                      p_vout->p_sys->i_x, p_vout->p_sys->i_y,
 450                      p_vout->p_sys->b_autocrop ? "" : "not " );
 451
 452     msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
 453 #endif
 454
 455     vout_Destroy( p_vout->p_sys->p_vout );
 456
 457     fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
 458     fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
 459     fmt.i_x_offset = fmt.i_y_offset = 0;
 460     fmt.i_chroma = p_vout->render.i_chroma;
 461     fmt.i_aspect = p_vout->p_sys->i_aspect;
 462     fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
 463     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 464
 465     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 466     if( p_vout->p_sys->p_vout == NULL )
 467     {
 468         msg_Err( p_vout, "failed to create vout" );
 469         intf_UserFatal( p_vout, VLC_FALSE, _("Cropping failed"),
 470                         _("VLC could not open the video output module.") );
 471         return VLC_EGENERIC;
 472     }
 473
 474     p_vout->p_sys->b_changed = VLC_FALSE;
 475     p_vout->p_sys->i_lastchange = 0;
 476
 477     return VLC_SUCCESS;
 478 }
 479
 480 /*****************************************************************************
 481  * Render: display previously rendered output
 482  *****************************************************************************
 483  * This function sends the currently rendered image to Crop image, waits
 484  * until it is displayed and switches the two rendering buffers, preparing next
 485  * frame.
 486  *****************************************************************************/
 487 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 488 {
 489     picture_t *p_outpic = NULL;
 490     int i_plane;
 491
 492     if( p_vout->p_sys->b_changed )
 493     {
 494         return;
 495     }
 496
 497     while( ( p_outpic =
 498                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 )
 499            ) == NULL )
 500     {
 501         if( p_vout->b_die || p_vout->b_error )
 502         {
 503             vout_DestroyPicture( p_vout->p_sys->p_vout, p_outpic );
 504             return;
 505         }
 506
 507         msleep( VOUT_OUTMEM_SLEEP );
 508     }
 509
 510     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 511     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 512
 513     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 514     {
 515         uint8_t *p_in, *p_out, *p_out_end;
 516         int i_in_pitch = p_pic->p[i_plane].i_pitch;
 517         const int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 518         const int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 519
 520         p_in = p_pic->p[i_plane].p_pixels
 521                 /* Skip the right amount of lines */
 522                 + i_in_pitch * ( p_pic->p[i_plane].i_visible_lines *
 523                                  p_vout->p_sys->i_y / p_vout->output.i_height )
 524                 /* Skip the right amount of columns */
 525                 + i_in_pitch * p_vout->p_sys->i_x / p_vout->output.i_width;
 526
 527         p_out = p_outpic->p[i_plane].p_pixels;
 528         p_out_end = p_out + i_out_pitch * p_outpic->p[i_plane].i_visible_lines;
 529
 530         while( p_out < p_out_end )
 531         {
 532             p_vout->p_libvlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 533             p_in += i_in_pitch;
 534             p_out += i_out_pitch;
 535         }
 536     }
 537
 538     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 539     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 540
 541     /* The source image may still be in the cache ... parse it! */
 542     if( p_vout->p_sys->b_autocrop )
 543     {
 544         UpdateStats( p_vout, p_pic );
 545     }
 546 }
 547
 548 #ifdef BEST_AUTOCROP
 549 static vlc_bool_t NonBlackLine(uint8_t *p_in, int i_line, int i_pitch,
 550                                int i_visible_pitch, int i_lines,
 551                                int i_lumThreshold, int i_skipCountPercent,
 552                                int i_nonBlackPixel, int i_chroma)
 553 {
 554     const int i_col = i_line * i_pitch / i_lines;
 555     int i_index, i_count = 0;
 556     int i_skipCount = 0;
 557
 558     switch(i_chroma)
 559     {
 560     // planar YUV
 561         case VLC_FOURCC('I','4','4','4'):
 562         case VLC_FOURCC('I','4','2','2'):
 563         case VLC_FOURCC('I','4','2','0'):
 564         case VLC_FOURCC('Y','V','1','2'):
 565         case VLC_FOURCC('I','Y','U','V'):
 566         case VLC_FOURCC('I','4','1','1'):
 567         case VLC_FOURCC('I','4','1','0'):
 568         case VLC_FOURCC('Y','V','U','9'):
 569         case VLC_FOURCC('Y','U','V','A'):
 570             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 571             for (i_index = i_col/2 + i_skipCount/2;
 572                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 573                  i_index++)
 574             {
 575                  i_count += (p_in[i_index] > i_lumThreshold);
 576             if (i_count > i_nonBlackPixel) break;
 577             }
 578             break;
 579     // packed RGB
 580         case VLC_FOURCC('R','G','B','2'):    // packed by 1
 581             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 582             for (i_index = i_col/2 + i_skipCount/2;
 583                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 584                  i_index++)
 585             {
 586                  i_count += (p_in[i_index] > i_lumThreshold);
 587             if (i_count > i_nonBlackPixel) break;
 588             }
 589             break;
 590         case VLC_FOURCC('R','V','1','5'):    // packed by 2
 591         case VLC_FOURCC('R','V','1','6'):    // packed by 2
 592             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 593             for (i_index = i_col/2 + i_skipCount/2 -
 594                                 (i_col/2 + i_skipCount/2) % 2;
 595                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 596                  i_index+=2)
 597             {
 598                  i_count += (p_in[i_index] > i_lumThreshold) &&
 599                             (p_in[i_index + 1] > i_lumThreshold);
 600             if (i_count > i_nonBlackPixel) break;
 601             }
 602             break;
 603         case VLC_FOURCC('R','V','2','4'):    // packed by 3
 604             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 605             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)
 606             {
 607                  i_count += (p_in[i_index] > i_lumThreshold) &&
 608                             (p_in[i_index + 1] > i_lumThreshold) &&
 609                             (p_in[i_index + 2] > i_lumThreshold);
 610             if (i_count > i_nonBlackPixel) break;
 611             }
 612             break;
 613         case VLC_FOURCC('R','V','3','2'):    // packed by 4
 614             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 615             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)
 616             {
 617                  i_count += (uint32_t)(*(p_in + i_index)) > (uint32_t)i_lumThreshold;
 618             if (i_count > i_nonBlackPixel) break;
 619             }
 620             break;
 621     // packed YUV
 622         case VLC_FOURCC('Y','U','Y','2'):    // packed by 2
 623         case VLC_FOURCC('Y','U','N','V'):    // packed by 2
 624         case VLC_FOURCC('U','Y','V','Y'):    // packed by 2
 625         case VLC_FOURCC('U','Y','N','V'):    // packed by 2
 626         case VLC_FOURCC('Y','4','2','2'):    // packed by 2
 627             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 628             for (i_index = (i_col/2 + i_skipCount/2) -
 629                            (i_col/2 + i_skipCount/2) % 2;
 630                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 631                  i_index+=2)
 632             {
 633                  i_count += (p_in[i_index] > i_lumThreshold);
 634             if (i_count > i_nonBlackPixel) break;
 635             }
 636             break;
 637         default :
 638             break;
 639     }
 640     return (i_count > i_nonBlackPixel);
 641 }
 642 #endif
 643
 644 static void UpdateStats( vout_thread_t *p_vout, picture_t *p_pic )
 645 {
 646    uint8_t *p_in = p_pic->p[0].p_pixels;
 647     int i_pitch = p_pic->p[0].i_pitch;
 648     int i_visible_pitch = p_pic->p[0].i_visible_pitch;
 649     int i_lines = p_pic->p[0].i_visible_lines;
 650     int i_firstwhite = -1, i_lastwhite = -1, i;
 651 #ifdef BEST_AUTOCROP
 652     int i_time = p_vout->p_sys->i_time;
 653     int i_diff = p_vout->p_sys->i_diff;
 654
 655     if (!p_vout->p_sys->i_ratio)
 656     {
 657         /* Determine where black borders are */
 658         for( i = 0 ; i < i_lines ; i++)
 659         {
 660                    if (NonBlackLine(p_in, i, i_pitch, i_visible_pitch, i_lines,
 661                             p_vout->p_sys->i_threshold,
 662                             p_vout->p_sys->i_skipPercent,
 663                             p_vout->p_sys->i_nonBlackPixel,
 664                             p_vout->output.i_chroma))
 665                 {
 666                     i_firstwhite = i;
 667                     i_lastwhite = i_lines - i;
 668                     break;
 669                 }
 670                 p_in += i_pitch;
 671         }
 672
 673         /* Decide whether it's worth changing the size */
 674         if( i_lastwhite == -1 )
 675         {
 676             p_vout->p_sys->i_lastchange = 0;
 677             return;
 678         }
 679
 680         if( (i_lastwhite - i_firstwhite) < (int) (p_vout->p_sys->i_height / 2) )
 681         {
 682             p_vout->p_sys->i_lastchange = 0;
 683             return;
 684         }
 685
 686         if (p_vout->output.i_aspect
 687                             * p_vout->output.i_height /
 688                                 (i_lastwhite - i_firstwhite + 1)
 689                             * p_vout->p_sys->i_width /
 690                                p_vout->output.i_width >
 691                                     p_vout->p_sys->i_ratio_max * 432)
 692         {
 693             int i_height = ((p_vout->output.i_aspect / 432) *
 694                            p_vout->output.i_height * p_vout->p_sys->i_width) /
 695                           (p_vout->output.i_width * p_vout->p_sys->i_ratio_max);
 696             i_firstwhite = (p_vout->output.i_height - i_height) / 2;
 697             i_lastwhite =  p_vout->output.i_height - i_firstwhite;
 698 /*
 699             p_vout->p_sys->i_lastchange = 0;
 700             return;
 701 */
 702         }
 703
 704         if( (i_lastwhite - i_firstwhite) <
 705                         (int) (p_vout->p_sys->i_height + i_diff)
 706              && (i_lastwhite - i_firstwhite + i_diff) >
 707                         (int) p_vout->p_sys->i_height )
 708         {
 709             p_vout->p_sys->i_lastchange = 0;
 710             return;
 711         }
 712
 713         /* We need at least 'i_time' images to make up our mind */
 714         p_vout->p_sys->i_lastchange++;
 715         if( p_vout->p_sys->i_lastchange < (unsigned int)i_time )
 716         {
 717             return;
 718         }
 719     }
 720     else
 721     {
 722         if ( p_vout->p_sys->i_lastchange >= (unsigned int)i_time )
 723         {
 724             p_vout->p_sys->i_aspect    =  p_vout->p_sys->i_ratio * 432;
 725             int i_height = p_vout->output.i_aspect
 726                                     * p_vout->output.i_height /
 727                                         p_vout->p_sys->i_aspect
 728                                     * p_vout->p_sys->i_width /
 729                                         p_vout->output.i_width;
 730             i_firstwhite = (p_vout->output.i_height - i_height) / 2;
 731             i_lastwhite =  p_vout->output.i_height - i_firstwhite;
 732         }
 733         else
 734         {
 735             return;
 736         }
 737     }
 738
 739 #else
 740     /* Determine where black borders are */
 741     switch( p_vout->output.i_chroma )
 742     {
 743     case VLC_FOURCC('I','4','2','0'):
 744         /* XXX: Do not laugh ! I know this is very naive. But it's just a
 745          *      proof of concept code snippet... */
 746         for( i = i_lines ; i-- ; )
 747         {
 748             const int i_col = i * i_pitch / i_lines;
 749
 750             if( p_in[i_col/2] > 40
 751                  && p_in[i_visible_pitch/2] > 40
 752                  && p_in[i_visible_pitch/2 + i_col/2] > 40 )
 753             {
 754                 if( i_lastwhite == -1 )
 755                 {
 756                     i_lastwhite = i;
 757                 }
 758                 i_firstwhite = i;
 759             }
 760             p_in += i_pitch;
 761         }
 762         break;
 763
 764     default:
 765         break;
 766     }
 767
 768     /* Decide whether it's worth changing the size */
 769     if( i_lastwhite == -1 )
 770     {
 771         p_vout->p_sys->i_lastchange = 0;
 772         return;
 773     }
 774
 775     if( (unsigned int)(i_lastwhite - i_firstwhite)
 776                                            < p_vout->p_sys->i_height / 2 )
 777     {
 778         p_vout->p_sys->i_lastchange = 0;
 779         return;
 780     }
 781
 782     if( (unsigned int)(i_lastwhite - i_firstwhite)
 783                                           < p_vout->p_sys->i_height + 16
 784          && (unsigned int)(i_lastwhite - i_firstwhite + 16)
 785                                                 > p_vout->p_sys->i_height )
 786     {
 787         p_vout->p_sys->i_lastchange = 0;
 788         return;
 789     }
 790
 791     /* We need at least 25 images to make up our mind */
 792     p_vout->p_sys->i_lastchange++;
 793     if( p_vout->p_sys->i_lastchange < 25 )
 794     {
 795         return;
 796     }
 797 #endif //BEST_AUTOCROP
 798
 799     /* Tune a few values */
 800     if( i_firstwhite & 1 )
 801     {
 802         i_firstwhite--;
 803     }
 804
 805     if( !(i_lastwhite & 1) )
 806     {
 807         i_lastwhite++;
 808     }
 809
 810     /* Change size */
 811     p_vout->p_sys->i_y = i_firstwhite;
 812     p_vout->p_sys->i_height = i_lastwhite - i_firstwhite + 1;
 813 #ifdef BEST_AUTOCROP
 814     // check p_vout->p_sys->i_height <= p_vout->output.i_height
 815     if (p_vout->p_sys->i_height > p_vout->output.i_height)
 816         p_vout->p_sys->i_height = p_vout->output.i_height;
 817 #endif
 818
 819     p_vout->p_sys->i_aspect = p_vout->output.i_aspect
 820                             * p_vout->output.i_height / p_vout->p_sys->i_height
 821                             * p_vout->p_sys->i_width / p_vout->output.i_width;
 822
 823     p_vout->p_sys->b_changed = VLC_TRUE;
 824 }
 825
 826 /*****************************************************************************
 827  * SendEvents: forward mouse and keyboard events to the parent p_vout
 828  *****************************************************************************/
 829 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 830                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 831 {
 832     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 833     vlc_value_t sentval = newval;
 834
 835     /* Translate the mouse coordinates */
 836     if( !strcmp( psz_var, "mouse-x" ) )
 837     {
 838         sentval.i_int += p_vout->p_sys->i_x;
 839     }
 840     else if( !strcmp( psz_var, "mouse-y" ) )
 841     {
 842         sentval.i_int += p_vout->p_sys->i_y;
 843     }
 844
 845     var_Set( p_vout, psz_var, sentval );
 846
 847     return VLC_SUCCESS;
 848 }
 849
 850 /*****************************************************************************
 851  * SendEventsToChild: forward events to the child/children vout
 852  *****************************************************************************/
 853 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 854                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 855 {
 856     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 857     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 858     return VLC_SUCCESS;
 859 }
 860
 861 #ifdef BEST_AUTOCROP
 862 /*****************************************************************************
 863  * FilterCallback: called when changing the ratio on the fly.
 864  *****************************************************************************/
 865 static int FilterCallback( vlc_object_t *p_this, char const *psz_var,
 866                            vlc_value_t oldval, vlc_value_t newval,
 867                            void *p_data )
 868 {
 869     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 870
 871     if( !strcmp( psz_var, "ratio-crop" ) )
 872     {
 873         if ( !strcmp( newval.psz_string, "Auto" ) )
 874             p_vout->p_sys->i_ratio = 0;
 875         else
 876         {
 877             p_vout->p_sys->i_ratio = (unsigned int)atoi(newval.psz_string);
 878             p_vout->p_sys->i_lastchange = p_vout->p_sys->i_time;
 879             p_vout->p_sys->b_autocrop = VLC_TRUE;
 880         }
 881         if (p_vout->p_sys->i_ratio)
 882         {
 883             if (p_vout->p_sys->i_ratio < (p_vout->output.i_width * 1000) /
 884                                     p_vout->output.i_height)
 885                 p_vout->p_sys->i_ratio = (p_vout->output.i_width * 1000) /
 886                                     p_vout->output.i_height;
 887             if (p_vout->p_sys->i_ratio < p_vout->output.i_aspect / 432)
 888                 p_vout->p_sys->i_ratio = p_vout->output.i_aspect / 432;
 889         }
 890      }
 891     return VLC_SUCCESS;
 892 }
 893 #endif