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
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <vlc_common.h>
  35 #include <vlc_plugin.h>
  36 #include <vlc_vout.h>
  37 #include <vlc_dialog.h>
  38
  39 #include "filter_common.h"
  40
  41 #define BEST_AUTOCROP 1
  42 #ifdef BEST_AUTOCROP
  43     #define RATIO_MAX 15000  // 10*4/3 for a 360
  44 #endif
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int  Create    ( vlc_object_t * );
  50 static void Destroy   ( vlc_object_t * );
  51
  52 static int  Init      ( vout_thread_t * );
  53 static void End       ( vout_thread_t * );
  54 static int  Manage    ( vout_thread_t * );
  55 static void Render    ( vout_thread_t *, picture_t * );
  56
  57 static void UpdateStats    ( vout_thread_t *, picture_t * );
  58
  59 static int  MouseEvent( vlc_object_t *, char const *,
  60                         vlc_value_t, vlc_value_t, void * );
  61
  62 #ifdef BEST_AUTOCROP
  63 /*****************************************************************************
  64  * Callback prototypes
  65  *****************************************************************************/
  66 static int FilterCallback ( vlc_object_t *, char const *,
  67                             vlc_value_t, vlc_value_t, void * );
  68 #endif
  69
  70 /*****************************************************************************
  71  * Module descriptor
  72  *****************************************************************************/
  73 #define GEOMETRY_TEXT N_("Crop geometry (pixels)")
  74 #define GEOMETRY_LONGTEXT N_("Set the geometry of the zone to crop. This is set as <width> x <height> + <left offset> + <top offset>.")
  75
  76 #define AUTOCROP_TEXT N_("Automatic cropping")
  77 #define AUTOCROP_LONGTEXT N_("Automatically detect black borders and crop them.")
  78
  79 #define CROP_HELP N_("Remove borders of the video and replace them by black borders")
  80
  81 #ifdef BEST_AUTOCROP
  82 #define RATIOMAX_TEXT N_("Ratio max (x 1000)")
  83 #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.")
  84
  85 #define RATIO_TEXT N_("Manual ratio")
  86 #define RATIO_LONGTEXT N_("Force a ratio (0 for automatic). Value is x1000: 1333 means 4/3.")
  87
  88 #define TIME_TEXT N_("Number of images for change")
  89 #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.")
  90
  91 #define DIFF_TEXT N_("Number of lines for change")
  92 #define DIFF_LONGTEXT N_("The minimum difference in the number of detected black lines to consider that ratio changed and trigger recrop.")
  93
  94 #define NBP_TEXT N_("Number of non black pixels ")
  95 #define NBP_LONGTEXT N_("The maximum of non-black pixels in a line to consider"\
  96                         " that the line is black.")
  97
  98 #define SKIP_TEXT N_("Skip percentage (%)")
  99 #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.")
 100
 101 #define LUM_TEXT N_("Luminance threshold ")
 102 #define LUM_LONGTEXT N_("Maximum luminance to consider a pixel as black (0-255).")
 103 #endif
 104
 105 vlc_module_begin ()
 106     set_description( N_("Crop video filter") )
 107     set_shortname( N_("Crop" ))
 108     set_help(CROP_HELP)
 109     set_category( CAT_VIDEO )
 110     set_subcategory( SUBCAT_VIDEO_VFILTER )
 111     set_capability( "video filter", 0 )
 112
 113     add_string( "crop-geometry", NULL, NULL, GEOMETRY_TEXT,
 114                                              GEOMETRY_LONGTEXT, false )
 115     add_bool( "autocrop", false, NULL, AUTOCROP_TEXT,
 116                                    AUTOCROP_LONGTEXT, false )
 117
 118 #ifdef BEST_AUTOCROP
 119     add_integer_with_range( "autocrop-ratio-max", 2405, 0, RATIO_MAX, NULL,
 120                             RATIOMAX_TEXT, RATIOMAX_LONGTEXT, true )
 121
 122     add_integer_with_range( "crop-ratio", 0, 0, RATIO_MAX, NULL, RATIO_TEXT,
 123                             RATIO_LONGTEXT, false )
 124     add_integer( "autocrop-time", 25, NULL, TIME_TEXT,
 125                  TIME_LONGTEXT, true )
 126     add_integer( "autocrop-diff", 16, NULL, DIFF_TEXT,
 127                                             DIFF_LONGTEXT, true )
 128
 129     add_integer( "autocrop-non-black-pixels", 3, NULL,
 130                  NBP_TEXT, NBP_LONGTEXT, true )
 131
 132     add_integer_with_range( "autocrop-skip-percent", 17, 0, 100, NULL,
 133                             SKIP_TEXT, SKIP_LONGTEXT, true )
 134
 135     add_integer_with_range( "autocrop-luminance-threshold", 40, 0, 128, NULL,
 136                             LUM_TEXT, LUM_LONGTEXT, true )
 137 #endif //BEST_AUTOCROP
 138
 139     add_shortcut( "crop" )
 140     set_callbacks( Create, Destroy )
 141 vlc_module_end ()
 142
 143 /*****************************************************************************
 144  * vout_sys_t: Crop video output method descriptor
 145  *****************************************************************************
 146  * This structure is part of the video output thread descriptor.
 147  * It describes the Crop specific properties of an output thread.
 148  *****************************************************************************/
 149 struct vout_sys_t
 150 {
 151     vlc_mutex_t lock;
 152     vout_thread_t *p_vout;
 153
 154     unsigned int i_x, i_y;
 155     unsigned int i_width, i_height, i_aspect;
 156
 157     bool b_autocrop;
 158
 159     /* Autocrop specific variables */
 160     unsigned int i_lastchange;
 161     bool   b_changed;
 162 #ifdef BEST_AUTOCROP
 163     unsigned int i_ratio_max;
 164     unsigned int i_threshold, i_skipPercent, i_nonBlackPixel, i_diff, i_time;
 165     unsigned int i_ratio;
 166 #endif
 167
 168 };
 169
 170 /*****************************************************************************
 171  * Control: control facility for the vout (forwards to child vout)
 172  *****************************************************************************/
 173 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 174 {
 175     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 176 }
 177
 178 /*****************************************************************************
 179  * Create: allocates Crop video thread output method
 180  *****************************************************************************
 181  * This function allocates and initializes a Crop vout method.
 182  *****************************************************************************/
 183 static int Create( vlc_object_t *p_this )
 184 {
 185     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 186
 187     /* Allocate structure */
 188     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 189     if( p_vout->p_sys == NULL )
 190         return VLC_ENOMEM;
 191
 192     p_vout->pf_init = Init;
 193     p_vout->pf_end = End;
 194     p_vout->pf_manage = Manage;
 195     p_vout->pf_render = Render;
 196     p_vout->pf_display = NULL;
 197     p_vout->pf_control = Control;
 198
 199     return VLC_SUCCESS;
 200 }
 201
 202 /*****************************************************************************
 203  * Init: initialize Crop video thread output method
 204  *****************************************************************************/
 205 static int Init( vout_thread_t *p_vout )
 206 {
 207     char *psz_var;
 208     video_format_t fmt;
 209
 210     I_OUTPUTPICTURES = 0;
 211     memset( &fmt, 0, sizeof(video_format_t) );
 212
 213     p_vout->p_sys->i_lastchange = 0;
 214     p_vout->p_sys->b_changed = false;
 215
 216     /* Initialize the output structure */
 217     p_vout->output.i_chroma = p_vout->render.i_chroma;
 218     p_vout->output.i_width  = p_vout->render.i_width;
 219     p_vout->output.i_height = p_vout->render.i_height;
 220     p_vout->output.i_aspect = p_vout->render.i_aspect;
 221     p_vout->fmt_out = p_vout->fmt_in;
 222
 223     /* Shall we use autocrop ? */
 224     p_vout->p_sys->b_autocrop = config_GetInt( p_vout, "autocrop" );
 225 #ifdef BEST_AUTOCROP
 226     p_vout->p_sys->i_ratio_max = config_GetInt( p_vout, "autocrop-ratio-max" );
 227     p_vout->p_sys->i_threshold =
 228                     config_GetInt( p_vout, "autocrop-luminance-threshold" );
 229     p_vout->p_sys->i_skipPercent =
 230                     config_GetInt( p_vout, "autocrop-skip-percent" );
 231     p_vout->p_sys->i_nonBlackPixel =
 232                     config_GetInt( p_vout, "autocrop-non-black-pixels" );
 233     p_vout->p_sys->i_diff = config_GetInt( p_vout, "autocrop-diff" );
 234     p_vout->p_sys->i_time = config_GetInt( p_vout, "autocrop-time" );
 235     var_SetString( p_vout, "ratio-crop", "0" );
 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 = (int64_t)VOUT_ASPECT_FACTOR *
 358         p_vout->fmt_out.i_sar_num * p_vout->p_sys->i_width /
 359         (p_vout->fmt_out.i_sar_den * p_vout->p_sys->i_height);
 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_sar_num = p_vout->p_sys->i_aspect * fmt.i_height;
 369     fmt.i_sar_den = VOUT_ASPECT_FACTOR * fmt.i_width;
 370
 371     /* Try to open the real video output */
 372     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 373     if( p_vout->p_sys->p_vout == NULL )
 374     {
 375         msg_Err( p_vout, "failed to create vout" );
 376         dialog_Fatal( p_vout, _("Cropping failed"), "%s",
 377                         _("VLC could not open the video output module.") );
 378         return VLC_EGENERIC;
 379     }
 380
 381     vlc_mutex_init( &p_vout->p_sys->lock );
 382 #ifdef BEST_AUTOCROP
 383     var_AddCallback( p_vout, "ratio-crop", FilterCallback, NULL );
 384 #endif
 385
 386     vout_filter_AllocateDirectBuffers( p_vout, VOUT_MAX_PICTURES );
 387
 388     vout_filter_AddChild( p_vout, p_vout->p_sys->p_vout, MouseEvent );
 389
 390     return VLC_SUCCESS;
 391 }
 392
 393 /*****************************************************************************
 394  * End: terminate Crop video thread output method
 395  *****************************************************************************/
 396 static void End( vout_thread_t *p_vout )
 397 {
 398     vout_sys_t *p_sys = p_vout->p_sys;
 399
 400     if( p_sys->p_vout )
 401     {
 402         vout_filter_DelChild( p_vout, p_sys->p_vout, MouseEvent );
 403         vout_CloseAndRelease( p_sys->p_vout );
 404     }
 405
 406     vout_filter_ReleaseDirectBuffers( p_vout );
 407     var_DelCallback( p_vout, "ratio-crop", FilterCallback, NULL );
 408     vlc_mutex_destroy( &p_sys->lock );
 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     free( p_vout->p_sys );
 421 }
 422
 423 /*****************************************************************************
 424  * Manage: handle Crop events
 425  *****************************************************************************
 426  * This function should be called regularly by video output thread. It manages
 427  * console events. It returns a non null value on error.
 428  *****************************************************************************/
 429 static int Manage( vout_thread_t *p_vout )
 430 {
 431     video_format_t fmt;
 432
 433     if( !p_vout->p_sys->b_changed )
 434     {
 435         return VLC_SUCCESS;
 436     }
 437
 438     memset( &fmt, 0, sizeof(video_format_t) );
 439
 440 #ifdef BEST_AUTOCROP
 441     /* XXX: not thread-safe with FilterCallback */
 442     msg_Dbg( p_vout, "cropping at %ix%i+%i+%i, %sautocropping",
 443                      p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 444                      p_vout->p_sys->i_x, p_vout->p_sys->i_y,
 445                      p_vout->p_sys->b_autocrop ? "" : "not " );
 446
 447     msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
 448 #endif
 449
 450     if( p_vout->p_sys->p_vout )
 451     {
 452         vout_filter_DelChild( p_vout, p_vout->p_sys->p_vout, MouseEvent );
 453         vout_CloseAndRelease( p_vout->p_sys->p_vout );
 454     }
 455
 456     fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
 457     fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
 458     fmt.i_x_offset = fmt.i_y_offset = 0;
 459     fmt.i_chroma = p_vout->render.i_chroma;
 460     fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
 461     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 462
 463     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 464     if( p_vout->p_sys->p_vout == NULL )
 465     {
 466         msg_Err( p_vout, "failed to create vout" );
 467         dialog_Fatal( p_vout, _("Cropping failed"), "%s",
 468                         _("VLC could not open the video output module.") );
 469         return VLC_EGENERIC;
 470     }
 471     vout_filter_AddChild( p_vout, p_vout->p_sys->p_vout, MouseEvent );
 472
 473     p_vout->p_sys->b_changed = false;
 474     vlc_mutex_lock( &p_vout->p_sys->lock );
 475     p_vout->p_sys->i_lastchange = 0;
 476     vlc_mutex_unlock( &p_vout->p_sys->lock );
 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( !vlc_object_alive (p_vout) || 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     p_outpic->date = 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             vlc_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     vlc_mutex_lock( &p_vout->p_sys->lock );
 544     if( p_vout->p_sys->b_autocrop )
 545         UpdateStats( p_vout, p_pic );
 546     vlc_mutex_unlock( &p_vout->p_sys->lock );
 547 }
 548
 549 #ifdef BEST_AUTOCROP
 550 static bool 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_CODEC_I444:
 563         case VLC_CODEC_I422:
 564         case VLC_CODEC_I420:
 565         case VLC_CODEC_YV12:
 566         case VLC_CODEC_I411:
 567         case VLC_CODEC_I410:
 568         case VLC_CODEC_YUVA:
 569             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 570             for (i_index = i_col/2 + i_skipCount/2;
 571                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 572                  i_index++)
 573             {
 574                  i_count += (p_in[i_index] > i_lumThreshold);
 575             if (i_count > i_nonBlackPixel) break;
 576             }
 577             break;
 578     // packed RGB
 579         case VLC_CODEC_RGB8:    // packed by 1
 580             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 581             for (i_index = i_col/2 + i_skipCount/2;
 582                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 583                  i_index++)
 584             {
 585                  i_count += (p_in[i_index] > i_lumThreshold);
 586             if (i_count > i_nonBlackPixel) break;
 587             }
 588             break;
 589         case VLC_CODEC_RGB15:    // packed by 2
 590         case VLC_CODEC_RGB16:    // packed by 2
 591             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 592             for (i_index = i_col/2 + i_skipCount/2 -
 593                                 (i_col/2 + i_skipCount/2) % 2;
 594                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 595                  i_index+=2)
 596             {
 597                  i_count += (p_in[i_index] > i_lumThreshold) &&
 598                             (p_in[i_index + 1] > i_lumThreshold);
 599             if (i_count > i_nonBlackPixel) break;
 600             }
 601             break;
 602         case VLC_CODEC_RGB24:    // packed by 3
 603             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 604             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)
 605             {
 606                  i_count += (p_in[i_index] > i_lumThreshold) &&
 607                             (p_in[i_index + 1] > i_lumThreshold) &&
 608                             (p_in[i_index + 2] > i_lumThreshold);
 609             if (i_count > i_nonBlackPixel) break;
 610             }
 611             break;
 612         case VLC_CODEC_RGB32:    // packed by 4
 613             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 614             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)
 615             {
 616                  i_count += (uint32_t)(*(p_in + i_index)) > (uint32_t)i_lumThreshold;
 617             if (i_count > i_nonBlackPixel) break;
 618             }
 619             break;
 620     // packed YUV
 621         case VLC_CODEC_YUYV:    // packed by 2
 622         case VLC_CODEC_UYVY:    // packed by 2
 623             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 624             for (i_index = (i_col/2 + i_skipCount/2) -
 625                            (i_col/2 + i_skipCount/2) % 2;
 626                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 627                  i_index+=2)
 628             {
 629                  i_count += (p_in[i_index] > i_lumThreshold);
 630             if (i_count > i_nonBlackPixel) break;
 631             }
 632             break;
 633         default :
 634             break;
 635     }
 636     return (i_count > i_nonBlackPixel);
 637 }
 638 #endif
 639
 640 static void UpdateStats( vout_thread_t *p_vout, picture_t *p_pic )
 641 {
 642    uint8_t *p_in = p_pic->p[0].p_pixels;
 643     int i_pitch = p_pic->p[0].i_pitch;
 644     int i_visible_pitch = p_pic->p[0].i_visible_pitch;
 645     int i_lines = p_pic->p[0].i_visible_lines;
 646     int i_firstwhite = -1, i_lastwhite = -1, i;
 647 #ifdef BEST_AUTOCROP
 648     int i_time = p_vout->p_sys->i_time;
 649     int i_diff = p_vout->p_sys->i_diff;
 650
 651     if (!p_vout->p_sys->i_ratio)
 652     {
 653         /* Determine where black borders are */
 654         for( i = 0 ; i < i_lines ; i++)
 655         {
 656                    if (NonBlackLine(p_in, i, i_pitch, i_visible_pitch, i_lines,
 657                             p_vout->p_sys->i_threshold,
 658                             p_vout->p_sys->i_skipPercent,
 659                             p_vout->p_sys->i_nonBlackPixel,
 660                             p_vout->output.i_chroma))
 661                 {
 662                     i_firstwhite = i;
 663                     i_lastwhite = i_lines - i;
 664                     break;
 665                 }
 666                 p_in += i_pitch;
 667         }
 668
 669         /* Decide whether it's worth changing the size */
 670         if( i_lastwhite == -1 )
 671         {
 672             p_vout->p_sys->i_lastchange = 0;
 673             return;
 674         }
 675
 676         if( (i_lastwhite - i_firstwhite) < (int) (p_vout->p_sys->i_height / 2) )
 677         {
 678             p_vout->p_sys->i_lastchange = 0;
 679             return;
 680         }
 681
 682         if (p_vout->output.i_aspect
 683                             * p_vout->output.i_height /
 684                                 (i_lastwhite - i_firstwhite + 1)
 685                             * p_vout->p_sys->i_width /
 686                                p_vout->output.i_width >
 687                                     p_vout->p_sys->i_ratio_max * 432)
 688         {
 689             int i_height = ((p_vout->output.i_aspect / 432) *
 690                            p_vout->output.i_height * p_vout->p_sys->i_width) /
 691                           (p_vout->output.i_width * p_vout->p_sys->i_ratio_max);
 692             i_firstwhite = (p_vout->output.i_height - i_height) / 2;
 693             i_lastwhite =  p_vout->output.i_height - i_firstwhite;
 694 /*
 695             p_vout->p_sys->i_lastchange = 0;
 696             return;
 697 */
 698         }
 699
 700         if( (i_lastwhite - i_firstwhite) <
 701                         (int) (p_vout->p_sys->i_height + i_diff)
 702              && (i_lastwhite - i_firstwhite + i_diff) >
 703                         (int) p_vout->p_sys->i_height )
 704         {
 705             p_vout->p_sys->i_lastchange = 0;
 706             return;
 707         }
 708
 709         /* We need at least 'i_time' images to make up our mind */
 710         p_vout->p_sys->i_lastchange++;
 711         if( p_vout->p_sys->i_lastchange < (unsigned int)i_time )
 712         {
 713             return;
 714         }
 715     }
 716     else
 717     {
 718         if ( p_vout->p_sys->i_lastchange >= (unsigned int)i_time )
 719         {
 720             p_vout->p_sys->i_aspect    =  p_vout->p_sys->i_ratio * 432;
 721             int i_height = p_vout->output.i_aspect
 722                                     * p_vout->output.i_height /
 723                                         p_vout->p_sys->i_aspect
 724                                     * p_vout->p_sys->i_width /
 725                                         p_vout->output.i_width;
 726             i_firstwhite = (p_vout->output.i_height - i_height) / 2;
 727             i_lastwhite =  p_vout->output.i_height - i_firstwhite;
 728         }
 729         else
 730         {
 731             return;
 732         }
 733     }
 734
 735 #else
 736     /* Determine where black borders are */
 737     switch( p_vout->output.i_chroma )
 738     {
 739     case VLC_CODEC_I420:
 740         /* XXX: Do not laugh ! I know this is very naive. But it's just a
 741          *      proof of concept code snippet... */
 742         for( i = i_lines ; i-- ; )
 743         {
 744             const int i_col = i * i_pitch / i_lines;
 745
 746             if( p_in[i_col/2] > 40
 747                  && p_in[i_visible_pitch/2] > 40
 748                  && p_in[i_visible_pitch/2 + i_col/2] > 40 )
 749             {
 750                 if( i_lastwhite == -1 )
 751                 {
 752                     i_lastwhite = i;
 753                 }
 754                 i_firstwhite = i;
 755             }
 756             p_in += i_pitch;
 757         }
 758         break;
 759
 760     default:
 761         break;
 762     }
 763
 764     /* Decide whether it's worth changing the size */
 765     if( i_lastwhite == -1 )
 766     {
 767         p_vout->p_sys->i_lastchange = 0;
 768         return;
 769     }
 770
 771     if( (unsigned int)(i_lastwhite - i_firstwhite)
 772                                            < p_vout->p_sys->i_height / 2 )
 773     {
 774         p_vout->p_sys->i_lastchange = 0;
 775         return;
 776     }
 777
 778     if( (unsigned int)(i_lastwhite - i_firstwhite)
 779                                           < p_vout->p_sys->i_height + 16
 780          && (unsigned int)(i_lastwhite - i_firstwhite + 16)
 781                                                 > p_vout->p_sys->i_height )
 782     {
 783         p_vout->p_sys->i_lastchange = 0;
 784         return;
 785     }
 786
 787     /* We need at least 25 images to make up our mind */
 788     p_vout->p_sys->i_lastchange++;
 789     if( p_vout->p_sys->i_lastchange < 25 )
 790     {
 791         return;
 792     }
 793 #endif //BEST_AUTOCROP
 794
 795     /* Tune a few values */
 796     if( i_firstwhite & 1 )
 797     {
 798         i_firstwhite--;
 799     }
 800
 801     if( !(i_lastwhite & 1) )
 802     {
 803         i_lastwhite++;
 804     }
 805
 806     /* Change size */
 807     p_vout->p_sys->i_y = i_firstwhite;
 808     p_vout->p_sys->i_height = i_lastwhite - i_firstwhite + 1;
 809 #ifdef BEST_AUTOCROP
 810     // check p_vout->p_sys->i_height <= p_vout->output.i_height
 811     if (p_vout->p_sys->i_height > p_vout->output.i_height)
 812         p_vout->p_sys->i_height = p_vout->output.i_height;
 813 #endif
 814
 815     p_vout->p_sys->i_aspect = p_vout->output.i_aspect
 816                             * p_vout->output.i_height / p_vout->p_sys->i_height
 817                             * p_vout->p_sys->i_width / p_vout->output.i_width;
 818
 819     p_vout->p_sys->b_changed = true;
 820 }
 821
 822 /**
 823  * Forward mouse event with proper conversion.
 824  */
 825 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
 826                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 827 {
 828     vout_thread_t *p_vout = p_data;
 829     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 830
 831     /* Translate the mouse coordinates
 832      * FIXME missing lock */
 833     if( !strcmp( psz_var, "mouse-x" ) )
 834         newval.i_int += p_vout->p_sys->i_x;
 835     else if( !strcmp( psz_var, "mouse-y" ) )
 836         newval.i_int += p_vout->p_sys->i_y;
 837
 838     return var_Set( p_vout, psz_var, newval );
 839 }
 840
 841 #ifdef BEST_AUTOCROP
 842 /*****************************************************************************
 843  * FilterCallback: called when changing the ratio on the fly.
 844  *****************************************************************************/
 845 static int FilterCallback( vlc_object_t *p_this, char const *psz_var,
 846                            vlc_value_t oldval, vlc_value_t newval,
 847                            void *p_data )
 848 {
 849     VLC_UNUSED(p_data); VLC_UNUSED(oldval);
 850     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 851
 852     if( !strcmp( psz_var, "ratio-crop" ) )
 853     {
 854         vlc_mutex_lock( &p_vout->p_sys->lock );
 855         if ( !strcmp( newval.psz_string, "Auto" ) )
 856             p_vout->p_sys->i_ratio = 0;
 857         else
 858         {
 859             p_vout->p_sys->i_ratio = (unsigned int)atoi(newval.psz_string);
 860             p_vout->p_sys->i_lastchange = p_vout->p_sys->i_time;
 861             p_vout->p_sys->b_autocrop = true;
 862         }
 863         if (p_vout->p_sys->i_ratio)
 864         {
 865             if (p_vout->p_sys->i_ratio < (p_vout->output.i_width * 1000) /
 866                                     p_vout->output.i_height)
 867                 p_vout->p_sys->i_ratio = (p_vout->output.i_width * 1000) /
 868                                     p_vout->output.i_height;
 869             if (p_vout->p_sys->i_ratio < p_vout->output.i_aspect / 432)
 870                 p_vout->p_sys->i_ratio = p_vout->output.i_aspect / 432;
 871         }
 872         vlc_mutex_unlock( &p_vout->p_sys->lock );
 873      }
 874     return VLC_SUCCESS;
 875 }
 876 #endif