git.sesse.net Git - vlc/blob - modules/video_chroma/yuy2_i420.c

   1 /*****************************************************************************
   2  * yuy2_i420.c : Packed YUV 4:2:2 to Planar YUV conversion module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea at videolan dot org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_filter.h>
  35
  36 #define SRC_FOURCC "YUY2,YUNV,YVYU,UYVY,UYNV,Y422,cyuv"
  37 #define DEST_FOURCC  "I420"
  38
  39 /*****************************************************************************
  40  * Local and extern prototypes.
  41  *****************************************************************************/
  42 static int  Activate ( vlc_object_t * );
  43
  44 static void YUY2_I420           ( filter_t *, picture_t *, picture_t * );
  45 static void YVYU_I420           ( filter_t *, picture_t *, picture_t * );
  46 static void UYVY_I420           ( filter_t *, picture_t *, picture_t * );
  47 static void cyuv_I420           ( filter_t *, picture_t *, picture_t * );
  48
  49 static picture_t *YUY2_I420_Filter    ( filter_t *, picture_t * );
  50 static picture_t *YVYU_I420_Filter    ( filter_t *, picture_t * );
  51 static picture_t *UYVY_I420_Filter    ( filter_t *, picture_t * );
  52 static picture_t *cyuv_I420_Filter    ( filter_t *, picture_t * );
  53
  54 /*****************************************************************************
  55  * Module descriptor
  56  *****************************************************************************/
  57 vlc_module_begin ()
  58     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
  59     set_capability( "video filter2", 80 )
  60     set_callbacks( Activate, NULL )
  61 vlc_module_end ()
  62
  63 /*****************************************************************************
  64  * Activate: allocate a chroma function
  65  *****************************************************************************
  66  * This function allocates and initializes a chroma function
  67  *****************************************************************************/
  68 static int Activate( vlc_object_t *p_this )
  69 {
  70     filter_t *p_filter = (filter_t *)p_this;
  71
  72     if( p_filter->fmt_in.video.i_width & 1
  73      || p_filter->fmt_in.video.i_height & 1 )
  74     {
  75         return -1;
  76     }
  77
  78     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width
  79      || p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
  80         return -1;
  81
  82     switch( p_filter->fmt_out.video.i_chroma )
  83     {
  84         case VLC_CODEC_I420:
  85             switch( p_filter->fmt_in.video.i_chroma )
  86             {
  87                 case VLC_CODEC_YUYV:
  88                     p_filter->pf_video_filter = YUY2_I420_Filter;
  89                     break;
  90
  91                 case VLC_CODEC_YVYU:
  92                     p_filter->pf_video_filter = YVYU_I420_Filter;
  93                     break;
  94
  95                 case VLC_CODEC_UYVY:
  96                     p_filter->pf_video_filter = UYVY_I420_Filter;
  97                     break;
  98
  99                 case VLC_CODEC_CYUV:
 100                     p_filter->pf_video_filter = cyuv_I420_Filter;
 101                     break;
 102
 103                 default:
 104                     return -1;
 105             }
 106             break;
 107
 108         default:
 109             return -1;
 110     }
 111     return 0;
 112 }
 113
 114 /* Following functions are local */
 115 VIDEO_FILTER_WRAPPER( YUY2_I420 )
 116 VIDEO_FILTER_WRAPPER( YVYU_I420 )
 117 VIDEO_FILTER_WRAPPER( UYVY_I420 )
 118 VIDEO_FILTER_WRAPPER( cyuv_I420 )
 119
 120 /*****************************************************************************
 121  * YUY2_I420: packed YUY2 4:2:2 to planar YUV 4:2:0
 122  *****************************************************************************/
 123 static void YUY2_I420( filter_t *p_filter, picture_t *p_source,
 124                                            picture_t *p_dest )
 125 {
 126     uint8_t *p_line = p_source->p->p_pixels;
 127
 128     uint8_t *p_y = p_dest->Y_PIXELS;
 129     uint8_t *p_u = p_dest->U_PIXELS;
 130     uint8_t *p_v = p_dest->V_PIXELS;
 131
 132     int i_x, i_y;
 133
 134     const int i_dest_margin = p_dest->p[0].i_pitch
 135                                  - p_dest->p[0].i_visible_pitch;
 136     const int i_dest_margin_c = p_dest->p[1].i_pitch
 137                                  - p_dest->p[1].i_visible_pitch;
 138     const int i_source_margin = p_source->p->i_pitch
 139                                - p_source->p->i_visible_pitch;
 140
 141     bool b_skip = false;
 142
 143     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 144     {
 145         if( b_skip )
 146         {
 147             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 148             {
 149     #define C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v )      \
 150                 *p_y++ = *p_line++; p_line++; \
 151                 *p_y++ = *p_line++; p_line++
 152                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
 153                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
 154                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
 155                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
 156             }
 157             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 158             {
 159                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
 160             }
 161         }
 162         else
 163         {
 164             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 165             {
 166     #define C_YUYV_YUV422( p_line, p_y, p_u, p_v )      \
 167                 *p_y++ = *p_line++; *p_u++ = *p_line++; \
 168                 *p_y++ = *p_line++; *p_v++ = *p_line++
 169                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 170                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 171                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 172                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 173             }
 174             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 175             {
 176                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 177             }
 178         }
 179         p_line += i_source_margin;
 180         p_y += i_dest_margin;
 181         p_u += i_dest_margin_c;
 182         p_v += i_dest_margin_c;
 183
 184         b_skip = !b_skip;
 185     }
 186 }
 187
 188 /*****************************************************************************
 189  * YVYU_I420: packed YVYU 4:2:2 to planar YUV 4:2:0
 190  *****************************************************************************/
 191 static void YVYU_I420( filter_t *p_filter, picture_t *p_source,
 192                                            picture_t *p_dest )
 193 {
 194     uint8_t *p_line = p_source->p->p_pixels;
 195
 196     uint8_t *p_y = p_dest->Y_PIXELS;
 197     uint8_t *p_u = p_dest->U_PIXELS;
 198     uint8_t *p_v = p_dest->V_PIXELS;
 199
 200     int i_x, i_y;
 201
 202     const int i_dest_margin = p_dest->p[0].i_pitch
 203                                  - p_dest->p[0].i_visible_pitch;
 204     const int i_dest_margin_c = p_dest->p[1].i_pitch
 205                                  - p_dest->p[1].i_visible_pitch;
 206     const int i_source_margin = p_source->p->i_pitch
 207                                - p_source->p->i_visible_pitch;
 208
 209     bool b_skip = false;
 210
 211     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 212     {
 213         if( b_skip )
 214         {
 215             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 216             {
 217     #define C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v )      \
 218                 *p_y++ = *p_line++; p_line++; \
 219                 *p_y++ = *p_line++; p_line++
 220                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
 221                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
 222                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
 223                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
 224             }
 225             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 226             {
 227                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
 228             }
 229         }
 230         else
 231         {
 232             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 233             {
 234     #define C_YVYU_YUV422( p_line, p_y, p_u, p_v )      \
 235                 *p_y++ = *p_line++; *p_v++ = *p_line++; \
 236                 *p_y++ = *p_line++; *p_u++ = *p_line++
 237                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 238                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 239                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 240                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 241             }
 242             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 243             {
 244                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 245             }
 246         }
 247         p_line += i_source_margin;
 248         p_y += i_dest_margin;
 249         p_u += i_dest_margin_c;
 250         p_v += i_dest_margin_c;
 251
 252         b_skip = !b_skip;
 253     }
 254 }
 255
 256 /*****************************************************************************
 257  * UYVY_I420: packed UYVY 4:2:2 to planar YUV 4:2:0
 258  *****************************************************************************/
 259 static void UYVY_I420( filter_t *p_filter, picture_t *p_source,
 260                                            picture_t *p_dest )
 261 {
 262     uint8_t *p_line = p_source->p->p_pixels;
 263
 264     uint8_t *p_y = p_dest->Y_PIXELS;
 265     uint8_t *p_u = p_dest->U_PIXELS;
 266     uint8_t *p_v = p_dest->V_PIXELS;
 267
 268     int i_x, i_y;
 269
 270     const int i_dest_margin = p_dest->p[0].i_pitch
 271                                  - p_dest->p[0].i_visible_pitch;
 272     const int i_dest_margin_c = p_dest->p[1].i_pitch
 273                                  - p_dest->p[1].i_visible_pitch;
 274     const int i_source_margin = p_source->p->i_pitch
 275                                - p_source->p->i_visible_pitch;
 276
 277     bool b_skip = false;
 278
 279     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 280     {
 281         if( b_skip )
 282         {
 283             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 284             {
 285     #define C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v )      \
 286                 *p_u++ = *p_line++; p_line++; \
 287                 *p_v++ = *p_line++; p_line++
 288                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
 289                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
 290                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
 291                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
 292             }
 293             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 294             {
 295                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
 296             }
 297         }
 298         else
 299         {
 300             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 301             {
 302     #define C_UYVY_YUV422( p_line, p_y, p_u, p_v )      \
 303                 *p_u++ = *p_line++; *p_y++ = *p_line++; \
 304                 *p_v++ = *p_line++; *p_y++ = *p_line++
 305                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 306                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 307                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 308                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 309             }
 310             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 311             {
 312                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 313             }
 314         }
 315         p_line += i_source_margin;
 316         p_y += i_dest_margin;
 317         p_u += i_dest_margin_c;
 318         p_v += i_dest_margin_c;
 319
 320         b_skip = !b_skip;
 321     }
 322 }
 323
 324 /*****************************************************************************
 325  * cyuv_I420: upside-down packed UYVY 4:2:2 to planar YUV 4:2:0
 326  * FIXME
 327  *****************************************************************************/
 328 static void cyuv_I420( filter_t *p_filter, picture_t *p_source,
 329                                            picture_t *p_dest )
 330 {
 331     uint8_t *p_line = p_source->p->p_pixels;
 332
 333     uint8_t *p_y = p_dest->Y_PIXELS;
 334     uint8_t *p_u = p_dest->U_PIXELS;
 335     uint8_t *p_v = p_dest->V_PIXELS;
 336
 337     int i_x, i_y;
 338
 339     const int i_dest_margin = p_dest->p[0].i_pitch
 340                                  - p_dest->p[0].i_visible_pitch;
 341     const int i_dest_margin_c = p_dest->p[1].i_pitch
 342                                  - p_dest->p[1].i_visible_pitch;
 343     const int i_source_margin = p_source->p->i_pitch
 344                                - p_source->p->i_visible_pitch;
 345
 346     bool b_skip = false;
 347
 348     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 349     {
 350         if( b_skip )
 351         {
 352             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 353             {
 354     #define C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v )      \
 355                 *p_y++ = *p_line++; p_line++; \
 356                 *p_y++ = *p_line++; p_line++
 357                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
 358                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
 359                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
 360                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
 361             }
 362             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 363             {
 364                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
 365             }
 366         }
 367         else
 368         {
 369             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 370             {
 371     #define C_cyuv_YUV422( p_line, p_y, p_u, p_v )      \
 372                 *p_y++ = *p_line++; *p_v++ = *p_line++; \
 373                 *p_y++ = *p_line++; *p_u++ = *p_line++
 374                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 375                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 376                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 377                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 378             }
 379             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 380             {
 381                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 382             }
 383         }
 384         p_line += i_source_margin;
 385         p_y += i_dest_margin;
 386         p_u += i_dest_margin_c;
 387         p_v += i_dest_margin_c;
 388
 389         b_skip = !b_skip;
 390     }
 391 }