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 #ifdef BEST_AUTOCROP
  80 #define RATIOMAX_TEXT N_("Ratio max (x 1000)")
  81 #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.")
  82
  83 #define RATIO_TEXT N_("Manual ratio")
  84 #define RATIO_LONGTEXT N_("Force a ratio (0 for automatic). Value is x1000: 1333 means 4/3.")
  85
  86 #define TIME_TEXT N_("Number of images for change")
  87 #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.")
  88
  89 #define DIFF_TEXT N_("Number of lines for change")
  90 #define DIFF_LONGTEXT N_("The minimum difference in the number of detected black lines to consider that ratio changed and trigger recrop.")
  91
  92 #define NBP_TEXT N_("Number of non black pixels ")
  93 #define NBP_LONGTEXT N_("The maximum of non-black pixels in a line to consider"\
  94                         " that the line is black.")
  95
  96 #define SKIP_TEXT N_("Skip percentage (%)")
  97 #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.")
  98
  99 #define LUM_TEXT N_("Luminance threshold ")
 100 #define LUM_LONGTEXT N_("Maximum luminance to consider a pixel as black (0-255).")
 101 #endif
 102
 103 vlc_module_begin ()
 104     set_description( N_("Crop video filter") )
 105     set_shortname( N_("Crop" ))
 106     set_category( CAT_VIDEO )
 107     set_subcategory( SUBCAT_VIDEO_VFILTER )
 108     set_capability( "video filter", 0 )
 109
 110     add_string( "crop-geometry", NULL, NULL, GEOMETRY_TEXT,
 111                                              GEOMETRY_LONGTEXT, false )
 112     add_bool( "autocrop", 0, NULL, AUTOCROP_TEXT,
 113                                    AUTOCROP_LONGTEXT, false )
 114
 115 #ifdef BEST_AUTOCROP
 116     add_integer_with_range( "autocrop-ratio-max", 2405, 0, RATIO_MAX, NULL,
 117                             RATIOMAX_TEXT, RATIOMAX_LONGTEXT, true )
 118
 119     add_integer_with_range( "crop-ratio", 0, 0, RATIO_MAX, NULL, RATIO_TEXT,
 120                             RATIO_LONGTEXT, false )
 121     add_integer( "autocrop-time", 25, NULL, TIME_TEXT,
 122                  TIME_LONGTEXT, true )
 123     add_integer( "autocrop-diff", 16, NULL, DIFF_TEXT,
 124                                             DIFF_LONGTEXT, true )
 125
 126     add_integer( "autocrop-non-black-pixels", 3, NULL,
 127                  NBP_TEXT, NBP_LONGTEXT, true )
 128
 129     add_integer_with_range( "autocrop-skip-percent", 17, 0, 100, NULL,
 130                             SKIP_TEXT, SKIP_LONGTEXT, true )
 131
 132     add_integer_with_range( "autocrop-luminance-threshold", 40, 0, 128, NULL,
 133                             LUM_TEXT, LUM_LONGTEXT, true )
 134 #endif //BEST_AUTOCROP
 135
 136     add_shortcut( "crop" )
 137     set_callbacks( Create, Destroy )
 138 vlc_module_end ()
 139
 140 /*****************************************************************************
 141  * vout_sys_t: Crop video output method descriptor
 142  *****************************************************************************
 143  * This structure is part of the video output thread descriptor.
 144  * It describes the Crop specific properties of an output thread.
 145  *****************************************************************************/
 146 struct vout_sys_t
 147 {
 148     vlc_mutex_t lock;
 149     vout_thread_t *p_vout;
 150
 151     unsigned int i_x, i_y;
 152     unsigned int i_width, i_height, i_aspect;
 153
 154     bool b_autocrop;
 155
 156     /* Autocrop specific variables */
 157     unsigned int i_lastchange;
 158     bool   b_changed;
 159 #ifdef BEST_AUTOCROP
 160     unsigned int i_ratio_max;
 161     unsigned int i_threshold, i_skipPercent, i_nonBlackPixel, i_diff, i_time;
 162     unsigned int i_ratio;
 163 #endif
 164
 165 };
 166
 167 /*****************************************************************************
 168  * Control: control facility for the vout (forwards to child vout)
 169  *****************************************************************************/
 170 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 171 {
 172     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 173 }
 174
 175 /*****************************************************************************
 176  * Create: allocates Crop video thread output method
 177  *****************************************************************************
 178  * This function allocates and initializes a Crop vout method.
 179  *****************************************************************************/
 180 static int Create( vlc_object_t *p_this )
 181 {
 182     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 183
 184     /* Allocate structure */
 185     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 186     if( p_vout->p_sys == NULL )
 187         return VLC_ENOMEM;
 188
 189     p_vout->pf_init = Init;
 190     p_vout->pf_end = End;
 191     p_vout->pf_manage = Manage;
 192     p_vout->pf_render = Render;
 193     p_vout->pf_display = NULL;
 194     p_vout->pf_control = Control;
 195
 196     return VLC_SUCCESS;
 197 }
 198
 199 /*****************************************************************************
 200  * Init: initialize Crop video thread output method
 201  *****************************************************************************/
 202 static int Init( vout_thread_t *p_vout )
 203 {
 204     char *psz_var;
 205     video_format_t fmt;
 206
 207     I_OUTPUTPICTURES = 0;
 208     memset( &fmt, 0, sizeof(video_format_t) );
 209
 210     p_vout->p_sys->i_lastchange = 0;
 211     p_vout->p_sys->b_changed = 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     var_SetString( p_vout, "ratio-crop", "0" );
 233
 234     if (p_vout->p_sys->b_autocrop)
 235         p_vout->p_sys->i_ratio = 0;
 236     else
 237     {
 238         p_vout->p_sys->i_ratio = config_GetInt( p_vout, "crop-ratio" );
 239         // ratio < width / height => ratio = 0 (unchange ratio)
 240         if (p_vout->p_sys->i_ratio < (p_vout->output.i_width * 1000) / p_vout->output.i_height)
 241             p_vout->p_sys->i_ratio = 0;
 242     }
 243 #endif
 244
 245
 246     /* Get geometry value from the user */
 247     psz_var = config_GetPsz( p_vout, "crop-geometry" );
 248     if( psz_var )
 249     {
 250         char *psz_parser, *psz_tmp;
 251
 252         psz_parser = psz_tmp = psz_var;
 253         while( *psz_tmp && *psz_tmp != 'x' ) psz_tmp++;
 254
 255         if( *psz_tmp )
 256         {
 257             psz_tmp[0] = '\0';
 258             p_vout->p_sys->i_width = atoi( psz_parser );
 259
 260             psz_parser = ++psz_tmp;
 261             while( *psz_tmp && *psz_tmp != '+' ) psz_tmp++;
 262
 263             if( *psz_tmp )
 264             {
 265                 psz_tmp[0] = '\0';
 266                 p_vout->p_sys->i_height = atoi( psz_parser );
 267
 268                 psz_parser = ++psz_tmp;
 269                 while( *psz_tmp && *psz_tmp != '+' ) psz_tmp++;
 270
 271                 if( *psz_tmp )
 272                 {
 273                     psz_tmp[0] = '\0';
 274                     p_vout->p_sys->i_x = atoi( psz_parser );
 275                     p_vout->p_sys->i_y = atoi( ++psz_tmp );
 276                 }
 277                 else
 278                 {
 279                     p_vout->p_sys->i_x = atoi( psz_parser );
 280                     p_vout->p_sys->i_y =
 281                      ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
 282                 }
 283             }
 284             else
 285             {
 286                 p_vout->p_sys->i_height = atoi( psz_parser );
 287                 p_vout->p_sys->i_x =
 288                      ( p_vout->output.i_width - p_vout->p_sys->i_width ) / 2;
 289                 p_vout->p_sys->i_y =
 290                      ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
 291             }
 292         }
 293         else
 294         {
 295             p_vout->p_sys->i_width = atoi( psz_parser );
 296             p_vout->p_sys->i_height = p_vout->output.i_height;
 297             p_vout->p_sys->i_x =
 298                      ( p_vout->output.i_width - p_vout->p_sys->i_width ) / 2;
 299             p_vout->p_sys->i_y =
 300                      ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
 301         }
 302
 303         /* Check for validity */
 304         if( p_vout->p_sys->i_x + p_vout->p_sys->i_width
 305                                                    > p_vout->output.i_width )
 306         {
 307             p_vout->p_sys->i_x = 0;
 308             if( p_vout->p_sys->i_width > p_vout->output.i_width )
 309             {
 310                 p_vout->p_sys->i_width = p_vout->output.i_width;
 311             }
 312         }
 313
 314         if( p_vout->p_sys->i_y + p_vout->p_sys->i_height
 315                                                    > p_vout->output.i_height )
 316         {
 317             p_vout->p_sys->i_y = 0;
 318             if( p_vout->p_sys->i_height > p_vout->output.i_height )
 319             {
 320                 p_vout->p_sys->i_height = p_vout->output.i_height;
 321             }
 322         }
 323
 324         free( psz_var );
 325     }
 326     else
 327 #ifdef BEST_AUTOCROP
 328     if (p_vout->p_sys->i_ratio)
 329     {
 330         p_vout->p_sys->i_aspect    =  p_vout->p_sys->i_ratio * 432;
 331         p_vout->p_sys->i_width  = p_vout->fmt_out.i_visible_width;
 332         p_vout->p_sys->i_height = p_vout->output.i_aspect
 333                                 * p_vout->output.i_height / p_vout->p_sys->i_aspect
 334                                 * p_vout->p_sys->i_width / p_vout->output.i_width;
 335         p_vout->p_sys->i_height += p_vout->p_sys->i_height % 2;
 336         p_vout->p_sys->i_x = p_vout->fmt_out.i_x_offset;
 337         p_vout->p_sys->i_y = (p_vout->output.i_height - p_vout->p_sys->i_height) / 2;
 338     }
 339     else
 340 #endif
 341     {
 342         p_vout->p_sys->i_width  = p_vout->fmt_out.i_visible_width;
 343         p_vout->p_sys->i_height = p_vout->fmt_out.i_visible_height;
 344         p_vout->p_sys->i_x = p_vout->fmt_out.i_x_offset;
 345         p_vout->p_sys->i_y = p_vout->fmt_out.i_y_offset;
 346     }
 347
 348     /* Pheeew. Parsing done. */
 349     msg_Dbg( p_vout, "cropping at %ix%i+%i+%i, %sautocropping",
 350                      p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 351                      p_vout->p_sys->i_x, p_vout->p_sys->i_y,
 352                      p_vout->p_sys->b_autocrop ? "" : "not " );
 353     /* Set current output image properties */
 354     p_vout->p_sys->i_aspect = p_vout->fmt_out.i_aspect
 355            * p_vout->fmt_out.i_visible_height / p_vout->p_sys->i_height
 356            * p_vout->p_sys->i_width / p_vout->fmt_out.i_visible_width;
 357
 358 #ifdef BEST_AUTOCROP
 359     msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
 360 #endif
 361     fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
 362     fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
 363     fmt.i_x_offset = fmt.i_y_offset = 0;
 364     fmt.i_chroma = p_vout->render.i_chroma;
 365     fmt.i_aspect = p_vout->p_sys->i_aspect;
 366     fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
 367     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 368
 369     /* Try to open the real video output */
 370     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 371     if( p_vout->p_sys->p_vout == NULL )
 372     {
 373         msg_Err( p_vout, "failed to create vout" );
 374         dialog_Fatal( p_vout, _("Cropping failed"),
 375                         _("VLC could not open the video output module.") );
 376         return VLC_EGENERIC;
 377     }
 378
 379 #ifdef BEST_AUTOCROP
 380     vlc_mutex_init( &p_vout->p_sys->lock );
 381     var_AddCallback( p_vout, "ratio-crop", FilterCallback, NULL );
 382 #endif
 383
 384     vout_filter_AllocateDirectBuffers( p_vout, VOUT_MAX_PICTURES );
 385
 386     vout_filter_AddChild( p_vout, p_vout->p_sys->p_vout, MouseEvent );
 387
 388     return VLC_SUCCESS;
 389 }
 390
 391 /*****************************************************************************
 392  * End: terminate Crop video thread output method
 393  *****************************************************************************/
 394 static void End( vout_thread_t *p_vout )
 395 {
 396     vout_sys_t *p_sys = p_vout->p_sys;
 397
 398     if( p_sys->p_vout )
 399     {
 400         vout_filter_DelChild( p_vout, p_sys->p_vout, MouseEvent );
 401         vout_CloseAndRelease( p_sys->p_vout );
 402     }
 403
 404     vout_filter_ReleaseDirectBuffers( p_vout );
 405     var_DelCallback( p_vout, "ratio-crop", FilterCallback, NULL );
 406     vlc_mutex_destroy( &p_sys->lock );
 407 }
 408
 409 /*****************************************************************************
 410  * Destroy: destroy Crop video thread output method
 411  *****************************************************************************
 412  * Terminate an output method created by CropCreateOutputMethod
 413  *****************************************************************************/
 414 static void Destroy( vlc_object_t *p_this )
 415 {
 416     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 417
 418     free( p_vout->p_sys );
 419 }
 420
 421 /*****************************************************************************
 422  * Manage: handle Crop events
 423  *****************************************************************************
 424  * This function should be called regularly by video output thread. It manages
 425  * console events. It returns a non null value on error.
 426  *****************************************************************************/
 427 static int Manage( vout_thread_t *p_vout )
 428 {
 429     video_format_t fmt;
 430
 431     if( !p_vout->p_sys->b_changed )
 432     {
 433         return VLC_SUCCESS;
 434     }
 435
 436     memset( &fmt, 0, sizeof(video_format_t) );
 437
 438 #ifdef BEST_AUTOCROP
 439     /* XXX: not thread-safe with FilterCallback */
 440     msg_Dbg( p_vout, "cropping at %ix%i+%i+%i, %sautocropping",
 441                      p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 442                      p_vout->p_sys->i_x, p_vout->p_sys->i_y,
 443                      p_vout->p_sys->b_autocrop ? "" : "not " );
 444
 445     msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
 446 #endif
 447
 448     if( p_vout->p_sys->p_vout )
 449     {
 450         vout_filter_DelChild( p_vout, p_vout->p_sys->p_vout, MouseEvent );
 451         vout_CloseAndRelease( p_vout->p_sys->p_vout );
 452     }
 453
 454     fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
 455     fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
 456     fmt.i_x_offset = fmt.i_y_offset = 0;
 457     fmt.i_chroma = p_vout->render.i_chroma;
 458     fmt.i_aspect = p_vout->p_sys->i_aspect;
 459     fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
 460     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 461
 462     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 463     if( p_vout->p_sys->p_vout == NULL )
 464     {
 465         msg_Err( p_vout, "failed to create vout" );
 466         dialog_Fatal( p_vout, _("Cropping failed"),
 467                         _("VLC could not open the video output module.") );
 468         return VLC_EGENERIC;
 469     }
 470     vout_filter_AddChild( p_vout, p_vout->p_sys->p_vout, MouseEvent );
 471
 472     p_vout->p_sys->b_changed = false;
 473     vlc_mutex_lock( &p_vout->p_sys->lock );
 474     p_vout->p_sys->i_lastchange = 0;
 475     vlc_mutex_unlock( &p_vout->p_sys->lock );
 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( !vlc_object_alive (p_vout) || 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     p_outpic->date = 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             vlc_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     vlc_mutex_lock( &p_vout->p_sys->lock );
 543     if( p_vout->p_sys->b_autocrop )
 544         UpdateStats( p_vout, p_pic );
 545     vlc_mutex_unlock( &p_vout->p_sys->lock );
 546 }
 547
 548 #ifdef BEST_AUTOCROP
 549 static bool 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_CODEC_I444:
 562         case VLC_CODEC_I422:
 563         case VLC_CODEC_I420:
 564         case VLC_CODEC_YV12:
 565         case VLC_CODEC_I411:
 566         case VLC_CODEC_I410:
 567         case VLC_CODEC_YUVA:
 568             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 569             for (i_index = i_col/2 + i_skipCount/2;
 570                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 571                  i_index++)
 572             {
 573                  i_count += (p_in[i_index] > i_lumThreshold);
 574             if (i_count > i_nonBlackPixel) break;
 575             }
 576             break;
 577     // packed RGB
 578         case VLC_CODEC_RGB8:    // packed by 1
 579             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 580             for (i_index = i_col/2 + i_skipCount/2;
 581                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 582                  i_index++)
 583             {
 584                  i_count += (p_in[i_index] > i_lumThreshold);
 585             if (i_count > i_nonBlackPixel) break;
 586             }
 587             break;
 588         case VLC_CODEC_RGB15:    // packed by 2
 589         case VLC_CODEC_RGB16:    // packed by 2
 590             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 591             for (i_index = i_col/2 + i_skipCount/2 -
 592                                 (i_col/2 + i_skipCount/2) % 2;
 593                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 594                  i_index+=2)
 595             {
 596                  i_count += (p_in[i_index] > i_lumThreshold) &&
 597                             (p_in[i_index + 1] > i_lumThreshold);
 598             if (i_count > i_nonBlackPixel) break;
 599             }
 600             break;
 601         case VLC_CODEC_RGB24:    // packed by 3
 602             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 603             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)
 604             {
 605                  i_count += (p_in[i_index] > i_lumThreshold) &&
 606                             (p_in[i_index + 1] > i_lumThreshold) &&
 607                             (p_in[i_index + 2] > i_lumThreshold);
 608             if (i_count > i_nonBlackPixel) break;
 609             }
 610             break;
 611         case VLC_CODEC_RGB32:    // packed by 4
 612             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 613             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)
 614             {
 615                  i_count += (uint32_t)(*(p_in + i_index)) > (uint32_t)i_lumThreshold;
 616             if (i_count > i_nonBlackPixel) break;
 617             }
 618             break;
 619     // packed YUV
 620         case VLC_CODEC_YUYV:    // packed by 2
 621         case VLC_CODEC_UYVY:    // packed by 2
 622             i_skipCount = (i_pitch * i_skipCountPercent) / 100;
 623             for (i_index = (i_col/2 + i_skipCount/2) -
 624                            (i_col/2 + i_skipCount/2) % 2;
 625                  i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
 626                  i_index+=2)
 627             {
 628                  i_count += (p_in[i_index] > i_lumThreshold);
 629             if (i_count > i_nonBlackPixel) break;
 630             }
 631             break;
 632         default :
 633             break;
 634     }
 635     return (i_count > i_nonBlackPixel);
 636 }
 637 #endif
 638
 639 static void UpdateStats( vout_thread_t *p_vout, picture_t *p_pic )
 640 {
 641    uint8_t *p_in = p_pic->p[0].p_pixels;
 642     int i_pitch = p_pic->p[0].i_pitch;
 643     int i_visible_pitch = p_pic->p[0].i_visible_pitch;
 644     int i_lines = p_pic->p[0].i_visible_lines;
 645     int i_firstwhite = -1, i_lastwhite = -1, i;
 646 #ifdef BEST_AUTOCROP
 647     int i_time = p_vout->p_sys->i_time;
 648     int i_diff = p_vout->p_sys->i_diff;
 649
 650     if (!p_vout->p_sys->i_ratio)
 651     {
 652         /* Determine where black borders are */
 653         for( i = 0 ; i < i_lines ; i++)
 654         {
 655                    if (NonBlackLine(p_in, i, i_pitch, i_visible_pitch, i_lines,
 656                             p_vout->p_sys->i_threshold,
 657                             p_vout->p_sys->i_skipPercent,
 658                             p_vout->p_sys->i_nonBlackPixel,
 659                             p_vout->output.i_chroma))
 660                 {
 661                     i_firstwhite = i;
 662                     i_lastwhite = i_lines - i;
 663                     break;
 664                 }
 665                 p_in += i_pitch;
 666         }
 667
 668         /* Decide whether it's worth changing the size */
 669         if( i_lastwhite == -1 )
 670         {
 671             p_vout->p_sys->i_lastchange = 0;
 672             return;
 673         }
 674
 675         if( (i_lastwhite - i_firstwhite) < (int) (p_vout->p_sys->i_height / 2) )
 676         {
 677             p_vout->p_sys->i_lastchange = 0;
 678             return;
 679         }
 680
 681         if (p_vout->output.i_aspect
 682                             * p_vout->output.i_height /
 683                                 (i_lastwhite - i_firstwhite + 1)
 684                             * p_vout->p_sys->i_width /
 685                                p_vout->output.i_width >
 686                                     p_vout->p_sys->i_ratio_max * 432)
 687         {
 688             int i_height = ((p_vout->output.i_aspect / 432) *
 689                            p_vout->output.i_height * p_vout->p_sys->i_width) /
 690                           (p_vout->output.i_width * p_vout->p_sys->i_ratio_max);
 691             i_firstwhite = (p_vout->output.i_height - i_height) / 2;
 692             i_lastwhite =  p_vout->output.i_height - i_firstwhite;
 693 /*
 694             p_vout->p_sys->i_lastchange = 0;
 695             return;
 696 */
 697         }
 698
 699         if( (i_lastwhite - i_firstwhite) <
 700                         (int) (p_vout->p_sys->i_height + i_diff)
 701              && (i_lastwhite - i_firstwhite + i_diff) >
 702                         (int) p_vout->p_sys->i_height )
 703         {
 704             p_vout->p_sys->i_lastchange = 0;
 705             return;
 706         }
 707
 708         /* We need at least 'i_time' images to make up our mind */
 709         p_vout->p_sys->i_lastchange++;
 710         if( p_vout->p_sys->i_lastchange < (unsigned int)i_time )
 711         {
 712             return;
 713         }
 714     }
 715     else
 716     {
 717         if ( p_vout->p_sys->i_lastchange >= (unsigned int)i_time )
 718         {
 719             p_vout->p_sys->i_aspect    =  p_vout->p_sys->i_ratio * 432;
 720             int i_height = p_vout->output.i_aspect
 721                                     * p_vout->output.i_height /
 722                                         p_vout->p_sys->i_aspect
 723                                     * p_vout->p_sys->i_width /
 724                                         p_vout->output.i_width;
 725             i_firstwhite = (p_vout->output.i_height - i_height) / 2;
 726             i_lastwhite =  p_vout->output.i_height - i_firstwhite;
 727         }
 728         else
 729         {
 730             return;
 731         }
 732     }
 733
 734 #else
 735     /* Determine where black borders are */
 736     switch( p_vout->output.i_chroma )
 737     {
 738     case VLC_CODEC_I420:
 739         /* XXX: Do not laugh ! I know this is very naive. But it's just a
 740          *      proof of concept code snippet... */
 741         for( i = i_lines ; i-- ; )
 742         {
 743             const int i_col = i * i_pitch / i_lines;
 744
 745             if( p_in[i_col/2] > 40
 746                  && p_in[i_visible_pitch/2] > 40
 747                  && p_in[i_visible_pitch/2 + i_col/2] > 40 )
 748             {
 749                 if( i_lastwhite == -1 )
 750                 {
 751                     i_lastwhite = i;
 752                 }
 753                 i_firstwhite = i;
 754             }
 755             p_in += i_pitch;
 756         }
 757         break;
 758
 759     default:
 760         break;
 761     }
 762
 763     /* Decide whether it's worth changing the size */
 764     if( i_lastwhite == -1 )
 765     {
 766         p_vout->p_sys->i_lastchange = 0;
 767         return;
 768     }
 769
 770     if( (unsigned int)(i_lastwhite - i_firstwhite)
 771                                            < p_vout->p_sys->i_height / 2 )
 772     {
 773         p_vout->p_sys->i_lastchange = 0;
 774         return;
 775     }
 776
 777     if( (unsigned int)(i_lastwhite - i_firstwhite)
 778                                           < p_vout->p_sys->i_height + 16
 779          && (unsigned int)(i_lastwhite - i_firstwhite + 16)
 780                                                 > p_vout->p_sys->i_height )
 781     {
 782         p_vout->p_sys->i_lastchange = 0;
 783         return;
 784     }
 785
 786     /* We need at least 25 images to make up our mind */
 787     p_vout->p_sys->i_lastchange++;
 788     if( p_vout->p_sys->i_lastchange < 25 )
 789     {
 790         return;
 791     }
 792 #endif //BEST_AUTOCROP
 793
 794     /* Tune a few values */
 795     if( i_firstwhite & 1 )
 796     {
 797         i_firstwhite--;
 798     }
 799
 800     if( !(i_lastwhite & 1) )
 801     {
 802         i_lastwhite++;
 803     }
 804
 805     /* Change size */
 806     p_vout->p_sys->i_y = i_firstwhite;
 807     p_vout->p_sys->i_height = i_lastwhite - i_firstwhite + 1;
 808 #ifdef BEST_AUTOCROP
 809     // check p_vout->p_sys->i_height <= p_vout->output.i_height
 810     if (p_vout->p_sys->i_height > p_vout->output.i_height)
 811         p_vout->p_sys->i_height = p_vout->output.i_height;
 812 #endif
 813
 814     p_vout->p_sys->i_aspect = p_vout->output.i_aspect
 815                             * p_vout->output.i_height / p_vout->p_sys->i_height
 816                             * p_vout->p_sys->i_width / p_vout->output.i_width;
 817
 818     p_vout->p_sys->b_changed = true;
 819 }
 820
 821 /**
 822  * Forward mouse event with proper conversion.
 823  */
 824 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
 825                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 826 {
 827     vout_thread_t *p_vout = p_data;
 828     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 829
 830     /* Translate the mouse coordinates
 831      * FIXME missing lock */
 832     if( !strcmp( psz_var, "mouse-x" ) )
 833         newval.i_int += p_vout->p_sys->i_x;
 834     else if( !strcmp( psz_var, "mouse-y" ) )
 835         newval.i_int += p_vout->p_sys->i_y;
 836
 837     return var_Set( p_vout, psz_var, newval );
 838 }
 839
 840 #ifdef BEST_AUTOCROP
 841 /*****************************************************************************
 842  * FilterCallback: called when changing the ratio on the fly.
 843  *****************************************************************************/
 844 static int FilterCallback( vlc_object_t *p_this, char const *psz_var,
 845                            vlc_value_t oldval, vlc_value_t newval,
 846                            void *p_data )
 847 {
 848     VLC_UNUSED(p_data); VLC_UNUSED(oldval);
 849     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 850
 851     if( !strcmp( psz_var, "ratio-crop" ) )
 852     {
 853         vlc_mutex_lock( &p_vout->p_sys->lock );
 854         if ( !strcmp( newval.psz_string, "Auto" ) )
 855             p_vout->p_sys->i_ratio = 0;
 856         else
 857         {
 858             p_vout->p_sys->i_ratio = (unsigned int)atoi(newval.psz_string);
 859             p_vout->p_sys->i_lastchange = p_vout->p_sys->i_time;
 860             p_vout->p_sys->b_autocrop = true;
 861         }
 862         if (p_vout->p_sys->i_ratio)
 863         {
 864             if (p_vout->p_sys->i_ratio < (p_vout->output.i_width * 1000) /
 865                                     p_vout->output.i_height)
 866                 p_vout->p_sys->i_ratio = (p_vout->output.i_width * 1000) /
 867                                     p_vout->output.i_height;
 868             if (p_vout->p_sys->i_ratio < p_vout->output.i_aspect / 432)
 869                 p_vout->p_sys->i_ratio = p_vout->output.i_aspect / 432;
 870         }
 871         vlc_mutex_unlock( &p_vout->p_sys->lock );
 872      }
 873     return VLC_SUCCESS;
 874 }
 875 #endif