git.sesse.net Git - vlc/blob - modules/video_chroma/i422_yuy2.c

   1 /*****************************************************************************
   2  * i422_yuy2.c : Planar YUV 4:2:2 to Packed YUV conversion module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Damien Fouilleul <damienf@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_filter.h>
  36 #include <vlc_cpu.h>
  37
  38 #include "i422_yuy2.h"
  39
  40 #define SRC_FOURCC  "I422"
  41 #if defined (MODULE_NAME_IS_i422_yuy2)
  42 #    define DEST_FOURCC "YUY2,YUNV,YVYU,UYVY,UYNV,Y422,IUYV,cyuv,Y211"
  43 #else
  44 #    define DEST_FOURCC "YUY2,YUNV,YVYU,UYVY,UYNV,Y422,IUYV,cyuv"
  45 #endif
  46
  47 /*****************************************************************************
  48  * Local and extern prototypes.
  49  *****************************************************************************/
  50 static int  Activate ( vlc_object_t * );
  51
  52 static void I422_YUY2               ( filter_t *, picture_t *, picture_t * );
  53 static void I422_YVYU               ( filter_t *, picture_t *, picture_t * );
  54 static void I422_UYVY               ( filter_t *, picture_t *, picture_t * );
  55 static void I422_IUYV               ( filter_t *, picture_t *, picture_t * );
  56 static void I422_cyuv               ( filter_t *, picture_t *, picture_t * );
  57 static picture_t *I422_YUY2_Filter  ( filter_t *, picture_t * );
  58 static picture_t *I422_YVYU_Filter  ( filter_t *, picture_t * );
  59 static picture_t *I422_UYVY_Filter  ( filter_t *, picture_t * );
  60 static picture_t *I422_IUYV_Filter  ( filter_t *, picture_t * );
  61 static picture_t *I422_cyuv_Filter  ( filter_t *, picture_t * );
  62 #if defined (MODULE_NAME_IS_i422_yuy2)
  63 static void I422_Y211               ( filter_t *, picture_t *, picture_t * );
  64 static picture_t *I422_Y211_Filter  ( filter_t *, picture_t * );
  65 #endif
  66
  67 /*****************************************************************************
  68  * Module descriptor
  69  *****************************************************************************/
  70 vlc_module_begin ()
  71 #if defined (MODULE_NAME_IS_i422_yuy2)
  72     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
  73     set_capability( "video filter2", 80 )
  74 # define vlc_CPU_capable() (true)
  75 # define VLC_TARGET
  76 #elif defined (MODULE_NAME_IS_i422_yuy2_mmx)
  77     set_description( N_("MMX conversions from " SRC_FOURCC " to " DEST_FOURCC) )
  78     set_capability( "video filter2", 100 )
  79 # define vlc_CPU_capable() vlc_CPU_MMX()
  80 # define VLC_TARGET VLC_MMX
  81 #elif defined (MODULE_NAME_IS_i422_yuy2_sse2)
  82     set_description( N_("SSE2 conversions from " SRC_FOURCC " to " DEST_FOURCC) )
  83     set_capability( "video filter2", 120 )
  84 # define vlc_CPU_capable() vlc_CPU_SSE2()
  85 # define VLC_TARGET VLC_SSE
  86 #endif
  87     set_callbacks( Activate, NULL )
  88 vlc_module_end ()
  89
  90 /*****************************************************************************
  91  * Activate: allocate a chroma function
  92  *****************************************************************************
  93  * This function allocates and initializes a chroma function
  94  *****************************************************************************/
  95 static int Activate( vlc_object_t *p_this )
  96 {
  97     filter_t *p_filter = (filter_t *)p_this;
  98
  99     if( !vlc_CPU_capable() )
 100         return VLC_EGENERIC;
 101     if( p_filter->fmt_in.video.i_width & 1
 102      || p_filter->fmt_in.video.i_height & 1 )
 103     {
 104         return -1;
 105     }
 106
 107     switch( p_filter->fmt_in.video.i_chroma )
 108     {
 109         case VLC_CODEC_I422:
 110             switch( p_filter->fmt_out.video.i_chroma )
 111             {
 112                 case VLC_CODEC_YUYV:
 113                     p_filter->pf_video_filter = I422_YUY2_Filter;
 114                     break;
 115
 116                 case VLC_CODEC_YVYU:
 117                     p_filter->pf_video_filter = I422_YVYU_Filter;
 118                     break;
 119
 120                 case VLC_CODEC_UYVY:
 121                     p_filter->pf_video_filter = I422_UYVY_Filter;
 122                     break;
 123
 124                 case VLC_FOURCC('I','U','Y','V'):
 125                     p_filter->pf_video_filter = I422_IUYV_Filter;
 126                     break;
 127
 128                 case VLC_CODEC_CYUV:
 129                     p_filter->pf_video_filter = I422_cyuv_Filter;
 130                     break;
 131
 132 #if defined (MODULE_NAME_IS_i422_yuy2)
 133                 case VLC_CODEC_Y211:
 134                     p_filter->pf_video_filter = I422_Y211_Filter;
 135                     break;
 136 #endif
 137
 138                 default:
 139                     return -1;
 140             }
 141             break;
 142
 143         default:
 144             return -1;
 145     }
 146     return 0;
 147 }
 148
 149 /* Following functions are local */
 150
 151 VIDEO_FILTER_WRAPPER( I422_YUY2 )
 152 VIDEO_FILTER_WRAPPER( I422_YVYU )
 153 VIDEO_FILTER_WRAPPER( I422_UYVY )
 154 VIDEO_FILTER_WRAPPER( I422_IUYV )
 155 VIDEO_FILTER_WRAPPER( I422_cyuv )
 156 #if defined (MODULE_NAME_IS_i422_yuy2)
 157 VIDEO_FILTER_WRAPPER( I422_Y211 )
 158 #endif
 159
 160 /*****************************************************************************
 161  * I422_YUY2: planar YUV 4:2:2 to packed YUY2 4:2:2
 162  *****************************************************************************/
 163 VLC_TARGET
 164 static void I422_YUY2( filter_t *p_filter, picture_t *p_source,
 165                                            picture_t *p_dest )
 166 {
 167     uint8_t *p_line = p_dest->p->p_pixels;
 168     uint8_t *p_y = p_source->Y_PIXELS;
 169     uint8_t *p_u = p_source->U_PIXELS;
 170     uint8_t *p_v = p_source->V_PIXELS;
 171
 172     int i_x, i_y;
 173
 174     const int i_source_margin = p_source->p[0].i_pitch
 175                                  - p_source->p[0].i_visible_pitch;
 176     const int i_source_margin_c = p_source->p[1].i_pitch
 177                                  - p_source->p[1].i_visible_pitch;
 178     const int i_dest_margin = p_dest->p->i_pitch
 179                                - p_dest->p->i_visible_pitch;
 180
 181 #if defined (MODULE_NAME_IS_i422_yuy2_sse2)
 182
 183     if( 0 == (15 & (p_source->p[Y_PLANE].i_pitch|p_dest->p->i_pitch|
 184         ((intptr_t)p_line|(intptr_t)p_y))) )
 185     {
 186         /* use faster SSE2 aligned fetch and store */
 187         for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 188         {
 189             for( i_x = p_filter->fmt_in.video.i_width / 16 ; i_x-- ; )
 190             {
 191                 SSE2_CALL( SSE2_YUV422_YUYV_ALIGNED );
 192             }
 193             for( i_x = ( p_filter->fmt_in.video.i_width % 16 ) / 2; i_x-- ; )
 194             {
 195                 C_YUV422_YUYV( p_line, p_y, p_u, p_v );
 196             }
 197             p_y += i_source_margin;
 198             p_u += i_source_margin_c;
 199             p_v += i_source_margin_c;
 200             p_line += i_dest_margin;
 201         }
 202     }
 203     else {
 204         /* use slower SSE2 unaligned fetch and store */
 205         for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 206         {
 207             for( i_x = p_filter->fmt_in.video.i_width / 16 ; i_x-- ; )
 208             {
 209                 SSE2_CALL( SSE2_YUV422_YUYV_UNALIGNED );
 210             }
 211             for( i_x = ( p_filter->fmt_in.video.i_width % 16 ) / 2; i_x-- ; )
 212             {
 213                 C_YUV422_YUYV( p_line, p_y, p_u, p_v );
 214             }
 215             p_y += i_source_margin;
 216             p_u += i_source_margin_c;
 217             p_v += i_source_margin_c;
 218             p_line += i_dest_margin;
 219         }
 220     }
 221     SSE2_END;
 222
 223 #else
 224
 225     for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 226     {
 227         for( i_x = p_filter->fmt_in.video.i_width / 8 ; i_x-- ; )
 228         {
 229 #if defined (MODULE_NAME_IS_i422_yuy2)
 230             C_YUV422_YUYV( p_line, p_y, p_u, p_v );
 231             C_YUV422_YUYV( p_line, p_y, p_u, p_v );
 232             C_YUV422_YUYV( p_line, p_y, p_u, p_v );
 233             C_YUV422_YUYV( p_line, p_y, p_u, p_v );
 234 #elif defined (MODULE_NAME_IS_i422_yuy2_mmx)
 235             MMX_CALL( MMX_YUV422_YUYV );
 236 #endif
 237         }
 238         for( i_x = ( p_filter->fmt_in.video.i_width % 8 ) / 2; i_x-- ; )
 239         {
 240             C_YUV422_YUYV( p_line, p_y, p_u, p_v );
 241         }
 242         p_y += i_source_margin;
 243         p_u += i_source_margin_c;
 244         p_v += i_source_margin_c;
 245         p_line += i_dest_margin;
 246     }
 247 #if defined (MODULE_NAME_IS_i422_yuy2_mmx)
 248     MMX_END;
 249 #endif
 250
 251 #endif
 252 }
 253
 254 /*****************************************************************************
 255  * I422_YVYU: planar YUV 4:2:2 to packed YVYU 4:2:2
 256  *****************************************************************************/
 257 VLC_TARGET
 258 static void I422_YVYU( filter_t *p_filter, picture_t *p_source,
 259                                            picture_t *p_dest )
 260 {
 261     uint8_t *p_line = p_dest->p->p_pixels;
 262     uint8_t *p_y = p_source->Y_PIXELS;
 263     uint8_t *p_u = p_source->U_PIXELS;
 264     uint8_t *p_v = p_source->V_PIXELS;
 265
 266     int i_x, i_y;
 267
 268     const int i_source_margin = p_source->p[0].i_pitch
 269                                  - p_source->p[0].i_visible_pitch;
 270     const int i_source_margin_c = p_source->p[1].i_pitch
 271                                  - p_source->p[1].i_visible_pitch;
 272     const int i_dest_margin = p_dest->p->i_pitch
 273                                - p_dest->p->i_visible_pitch;
 274
 275 #if defined (MODULE_NAME_IS_i422_yuy2_sse2)
 276
 277     if( 0 == (15 & (p_source->p[Y_PLANE].i_pitch|p_dest->p->i_pitch|
 278         ((intptr_t)p_line|(intptr_t)p_y))) )
 279     {
 280         /* use faster SSE2 aligned fetch and store */
 281         for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 282         {
 283             for( i_x = p_filter->fmt_in.video.i_width / 16 ; i_x-- ; )
 284             {
 285                 SSE2_CALL( SSE2_YUV422_YVYU_ALIGNED );
 286             }
 287             for( i_x = ( p_filter->fmt_in.video.i_width % 16 ) / 2; i_x-- ; )
 288             {
 289                 C_YUV422_YVYU( p_line, p_y, p_u, p_v );
 290             }
 291             p_y += i_source_margin;
 292             p_u += i_source_margin_c;
 293             p_v += i_source_margin_c;
 294             p_line += i_dest_margin;
 295         }
 296     }
 297     else {
 298         /* use slower SSE2 unaligned fetch and store */
 299         for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 300         {
 301             for( i_x = p_filter->fmt_in.video.i_width / 16 ; i_x-- ; )
 302             {
 303                 SSE2_CALL( SSE2_YUV422_YVYU_UNALIGNED );
 304             }
 305             for( i_x = ( p_filter->fmt_in.video.i_width % 16 ) / 2; i_x-- ; )
 306             {
 307                 C_YUV422_YVYU( p_line, p_y, p_u, p_v );
 308             }
 309             p_y += i_source_margin;
 310             p_u += i_source_margin_c;
 311             p_v += i_source_margin_c;
 312             p_line += i_dest_margin;
 313         }
 314     }
 315     SSE2_END;
 316
 317 #else
 318
 319     for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 320     {
 321         for( i_x = p_filter->fmt_in.video.i_width / 8 ; i_x-- ; )
 322         {
 323 #if defined (MODULE_NAME_IS_i422_yuy2)
 324             C_YUV422_YVYU( p_line, p_y, p_u, p_v );
 325             C_YUV422_YVYU( p_line, p_y, p_u, p_v );
 326             C_YUV422_YVYU( p_line, p_y, p_u, p_v );
 327             C_YUV422_YVYU( p_line, p_y, p_u, p_v );
 328 #elif defined (MODULE_NAME_IS_i422_yuy2_mmx)
 329             MMX_CALL( MMX_YUV422_YVYU );
 330 #endif
 331         }
 332         for( i_x = ( p_filter->fmt_in.video.i_width % 8 ) / 2; i_x-- ; )
 333         {
 334             C_YUV422_YVYU( p_line, p_y, p_u, p_v );
 335         }
 336         p_y += i_source_margin;
 337         p_u += i_source_margin_c;
 338         p_v += i_source_margin_c;
 339         p_line += i_dest_margin;
 340     }
 341 #if defined (MODULE_NAME_IS_i422_yuy2_mmx)
 342     MMX_END;
 343 #endif
 344
 345 #endif
 346 }
 347
 348 /*****************************************************************************
 349  * I422_UYVY: planar YUV 4:2:2 to packed UYVY 4:2:2
 350  *****************************************************************************/
 351 VLC_TARGET
 352 static void I422_UYVY( filter_t *p_filter, picture_t *p_source,
 353                                            picture_t *p_dest )
 354 {
 355     uint8_t *p_line = p_dest->p->p_pixels;
 356     uint8_t *p_y = p_source->Y_PIXELS;
 357     uint8_t *p_u = p_source->U_PIXELS;
 358     uint8_t *p_v = p_source->V_PIXELS;
 359
 360     int i_x, i_y;
 361
 362     const int i_source_margin = p_source->p[0].i_pitch
 363                                  - p_source->p[0].i_visible_pitch;
 364     const int i_source_margin_c = p_source->p[1].i_pitch
 365                                  - p_source->p[1].i_visible_pitch;
 366     const int i_dest_margin = p_dest->p->i_pitch
 367                                - p_dest->p->i_visible_pitch;
 368
 369 #if defined (MODULE_NAME_IS_i422_yuy2_sse2)
 370
 371     if( 0 == (15 & (p_source->p[Y_PLANE].i_pitch|p_dest->p->i_pitch|
 372         ((intptr_t)p_line|(intptr_t)p_y))) )
 373     {
 374         /* use faster SSE2 aligned fetch and store */
 375         for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 376         {
 377             for( i_x = p_filter->fmt_in.video.i_width / 16 ; i_x-- ; )
 378             {
 379                 SSE2_CALL( SSE2_YUV422_UYVY_ALIGNED );
 380             }
 381             for( i_x = ( p_filter->fmt_in.video.i_width % 16 ) / 2; i_x-- ; )
 382             {
 383                 C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 384             }
 385             p_y += i_source_margin;
 386             p_u += i_source_margin_c;
 387             p_v += i_source_margin_c;
 388             p_line += i_dest_margin;
 389         }
 390     }
 391     else {
 392         /* use slower SSE2 unaligned fetch and store */
 393         for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 394         {
 395             for( i_x = p_filter->fmt_in.video.i_width / 16 ; i_x-- ; )
 396             {
 397                 SSE2_CALL( SSE2_YUV422_UYVY_UNALIGNED );
 398             }
 399             for( i_x = ( p_filter->fmt_in.video.i_width % 16 ) / 2; i_x-- ; )
 400             {
 401                 C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 402             }
 403             p_y += i_source_margin;
 404             p_u += i_source_margin_c;
 405             p_v += i_source_margin_c;
 406             p_line += i_dest_margin;
 407         }
 408     }
 409     SSE2_END;
 410
 411 #else
 412
 413     for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 414     {
 415         for( i_x = p_filter->fmt_in.video.i_width / 8 ; i_x-- ; )
 416         {
 417 #if defined (MODULE_NAME_IS_i422_yuy2)
 418             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 419             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 420             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 421             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 422 #elif defined (MODULE_NAME_IS_i422_yuy2_mmx)
 423             MMX_CALL( MMX_YUV422_UYVY );
 424 #endif
 425         }
 426         for( i_x = ( p_filter->fmt_in.video.i_width % 8 ) / 2; i_x-- ; )
 427         {
 428             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 429         }
 430         p_y += i_source_margin;
 431         p_u += i_source_margin_c;
 432         p_v += i_source_margin_c;
 433         p_line += i_dest_margin;
 434     }
 435 #if defined (MODULE_NAME_IS_i422_yuy2_mmx)
 436     MMX_END;
 437 #endif
 438
 439 #endif
 440 }
 441
 442 /*****************************************************************************
 443  * I422_IUYV: planar YUV 4:2:2 to interleaved packed IUYV 4:2:2
 444  *****************************************************************************/
 445 static void I422_IUYV( filter_t *p_filter, picture_t *p_source,
 446                                            picture_t *p_dest )
 447 {
 448     VLC_UNUSED(p_source); VLC_UNUSED(p_dest);
 449     /* FIXME: TODO ! */
 450     msg_Err( p_filter, "I422_IUYV unimplemented, please harass <sam@zoy.org>" );
 451 }
 452
 453 /*****************************************************************************
 454  * I422_cyuv: planar YUV 4:2:2 to upside-down packed UYVY 4:2:2
 455  *****************************************************************************/
 456 VLC_TARGET
 457 static void I422_cyuv( filter_t *p_filter, picture_t *p_source,
 458                                            picture_t *p_dest )
 459 {
 460     uint8_t *p_line = p_dest->p->p_pixels + p_dest->p->i_visible_lines * p_dest->p->i_pitch;
 461     uint8_t *p_y = p_source->Y_PIXELS;
 462     uint8_t *p_u = p_source->U_PIXELS;
 463     uint8_t *p_v = p_source->V_PIXELS;
 464
 465     int i_x, i_y;
 466
 467     const int i_source_margin = p_source->p[0].i_pitch
 468                                  - p_source->p[0].i_visible_pitch;
 469     const int i_source_margin_c = p_source->p[1].i_pitch
 470                                  - p_source->p[1].i_visible_pitch;
 471     const int i_dest_margin = p_dest->p->i_pitch
 472                                - p_dest->p->i_visible_pitch;
 473
 474 #if defined (MODULE_NAME_IS_i422_yuy2_sse2)
 475
 476     if( 0 == (15 & (p_source->p[Y_PLANE].i_pitch|p_dest->p->i_pitch|
 477         ((intptr_t)p_line|(intptr_t)p_y))) )
 478     {
 479         /* use faster SSE2 aligned fetch and store */
 480         for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 481         {
 482             p_line -= 2 * p_dest->p->i_pitch;
 483
 484             for( i_x = p_filter->fmt_in.video.i_width / 16 ; i_x-- ; )
 485             {
 486                 SSE2_CALL( SSE2_YUV422_UYVY_ALIGNED );
 487             }
 488             for( i_x = ( p_filter->fmt_in.video.i_width % 16 ) / 2; i_x-- ; )
 489             {
 490                 C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 491             }
 492             p_y += i_source_margin;
 493             p_u += i_source_margin_c;
 494             p_v += i_source_margin_c;
 495             p_line += i_dest_margin;
 496         }
 497     }
 498     else {
 499         /* use slower SSE2 unaligned fetch and store */
 500         for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 501         {
 502             p_line -= 2 * p_dest->p->i_pitch;
 503
 504             for( i_x = p_filter->fmt_in.video.i_width / 16 ; i_x-- ; )
 505             {
 506                 SSE2_CALL( SSE2_YUV422_UYVY_UNALIGNED );
 507             }
 508             for( i_x = ( p_filter->fmt_in.video.i_width % 16 ) / 2; i_x-- ; )
 509             {
 510                 C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 511             }
 512             p_y += i_source_margin;
 513             p_u += i_source_margin_c;
 514             p_v += i_source_margin_c;
 515             p_line += i_dest_margin;
 516         }
 517     }
 518     SSE2_END;
 519
 520 #else
 521
 522     for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 523     {
 524         for( i_x = p_filter->fmt_in.video.i_width / 8 ; i_x-- ; )
 525         {
 526             p_line -= 2 * p_dest->p->i_pitch;
 527
 528 #if defined (MODULE_NAME_IS_i422_yuy2)
 529             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 530             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 531             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 532             C_YUV422_UYVY( p_line, p_y, p_u, p_v );
 533 #elif defined (MODULE_NAME_IS_i422_yuy2_mmx)
 534             MMX_CALL( MMX_YUV422_UYVY );
 535 #endif
 536         }
 537         p_y += i_source_margin;
 538         p_u += i_source_margin_c;
 539         p_v += i_source_margin_c;
 540         p_line += i_dest_margin;
 541     }
 542 #if defined (MODULE_NAME_IS_i422_yuy2_mmx)
 543     MMX_END;
 544 #elif defined (MODULE_NAME_IS_i422_yuy2_sse2)
 545     SSE2_END;
 546 #endif
 547
 548 #endif
 549 }
 550
 551 /*****************************************************************************
 552  * I422_Y211: planar YUV 4:2:2 to packed YUYV 2:1:1
 553  *****************************************************************************/
 554 #if defined (MODULE_NAME_IS_i422_yuy2)
 555 static void I422_Y211( filter_t *p_filter, picture_t *p_source,
 556                                            picture_t *p_dest )
 557 {
 558     uint8_t *p_line = p_dest->p->p_pixels + p_dest->p->i_visible_lines * p_dest->p->i_pitch;
 559     uint8_t *p_y = p_source->Y_PIXELS;
 560     uint8_t *p_u = p_source->U_PIXELS;
 561     uint8_t *p_v = p_source->V_PIXELS;
 562
 563     int i_x, i_y;
 564
 565     for( i_y = p_filter->fmt_in.video.i_height ; i_y-- ; )
 566     {
 567         for( i_x = p_filter->fmt_in.video.i_width / 8 ; i_x-- ; )
 568         {
 569             C_YUV422_Y211( p_line, p_y, p_u, p_v );
 570             C_YUV422_Y211( p_line, p_y, p_u, p_v );
 571         }
 572     }
 573 }
 574 #endif