git.sesse.net Git - vlc/blob - modules/video_chroma/yuy2_i422.c

   1 /*****************************************************************************
   2  * yuy2_i422.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 #include <vlc_vout.h>
  36
  37 #define SRC_FOURCC "YUY2,YUNV,YVYU,UYVY,UYNV,Y422,cyuv"
  38 #define DEST_FOURCC  "I422"
  39
  40 /*****************************************************************************
  41  * Local and extern prototypes.
  42  *****************************************************************************/
  43 static int  Activate ( vlc_object_t * );
  44
  45 static void YUY2_I422           ( filter_t *, picture_t *, picture_t * );
  46 static void YVYU_I422           ( filter_t *, picture_t *, picture_t * );
  47 static void UYVY_I422           ( filter_t *, picture_t *, picture_t * );
  48 static void cyuv_I422           ( filter_t *, picture_t *, picture_t * );
  49
  50 /*****************************************************************************
  51  * Module descriptor
  52  *****************************************************************************/
  53 vlc_module_begin();
  54     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
  55     set_capability( "chroma", 80 );
  56     set_callbacks( Activate, NULL );
  57 vlc_module_end();
  58
  59 /*****************************************************************************
  60  * Activate: allocate a chroma function
  61  *****************************************************************************
  62  * This function allocates and initializes a chroma function
  63  *****************************************************************************/
  64 static int Activate( vlc_object_t *p_this )
  65 {
  66     filter_t *p_filter = (filter_t *)p_this;
  67
  68     if( p_filter->fmt_in.video.i_width & 1
  69      || p_filter->fmt_in.video.i_height & 1 )
  70     {
  71         return -1;
  72     }
  73
  74     switch( p_filter->fmt_out.video.i_chroma )
  75     {
  76         case VLC_FOURCC('I','4','2','2'):
  77             switch( p_filter->fmt_in.video.i_chroma )
  78             {
  79                 case VLC_FOURCC('Y','U','Y','2'):
  80                 case VLC_FOURCC('Y','U','N','V'):
  81                     p_filter->pf_video_filter_io = YUY2_I422;
  82                     break;
  83
  84                 case VLC_FOURCC('Y','V','Y','U'):
  85                     p_filter->pf_video_filter_io = YVYU_I422;
  86                     break;
  87
  88                 case VLC_FOURCC('U','Y','V','Y'):
  89                 case VLC_FOURCC('U','Y','N','V'):
  90                 case VLC_FOURCC('Y','4','2','2'):
  91                     p_filter->pf_video_filter_io = UYVY_I422;
  92                     break;
  93
  94                 case VLC_FOURCC('c','y','u','v'):
  95                     p_filter->pf_video_filter_io = cyuv_I422;
  96                     break;
  97
  98                 default:
  99                     return -1;
 100             }
 101             break;
 102
 103         default:
 104             return -1;
 105     }
 106     return 0;
 107 }
 108
 109 /* Following functions are local */
 110
 111 /*****************************************************************************
 112  * YUY2_I422: packed YUY2 4:2:2 to planar YUV 4:2:2
 113  *****************************************************************************/
 114 static void YUY2_I422( filter_t *p_filter, picture_t *p_source,
 115                                            picture_t *p_dest )
 116 {
 117     uint8_t *p_line = p_source->p->p_pixels;
 118
 119     uint8_t *p_y = p_dest->Y_PIXELS;
 120     uint8_t *p_u = p_dest->U_PIXELS;
 121     uint8_t *p_v = p_dest->V_PIXELS;
 122
 123     int i_x, i_y;
 124
 125     const int i_dest_margin = p_dest->p[0].i_pitch
 126                                  - p_dest->p[0].i_visible_pitch;
 127     const int i_dest_margin_c = p_dest->p[1].i_pitch
 128                                  - p_dest->p[1].i_visible_pitch;
 129     const int i_source_margin = p_source->p->i_pitch
 130                                - p_source->p->i_visible_pitch;
 131
 132     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 133     {
 134         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 135         {
 136 #define C_YUYV_YUV422( p_line, p_y, p_u, p_v )      \
 137             *p_y++ = *p_line++; *p_u++ = *p_line++; \
 138             *p_y++ = *p_line++; *p_v++ = *p_line++
 139             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 140             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 141             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 142             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 143         }
 144         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 145         {
 146             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 147         }
 148         p_line += i_source_margin;
 149         p_y += i_dest_margin;
 150         p_u += i_dest_margin_c;
 151         p_v += i_dest_margin_c;
 152     }
 153 }
 154
 155 /*****************************************************************************
 156  * YVYU_I422: packed YVYU 4:2:2 to planar YUV 4:2:2
 157  *****************************************************************************/
 158 static void YVYU_I422( filter_t *p_filter, picture_t *p_source,
 159                                            picture_t *p_dest )
 160 {
 161     uint8_t *p_line = p_source->p->p_pixels;
 162
 163     uint8_t *p_y = p_dest->Y_PIXELS;
 164     uint8_t *p_u = p_dest->U_PIXELS;
 165     uint8_t *p_v = p_dest->V_PIXELS;
 166
 167     int i_x, i_y;
 168
 169     const int i_dest_margin = p_dest->p[0].i_pitch
 170                                  - p_dest->p[0].i_visible_pitch;
 171     const int i_dest_margin_c = p_dest->p[1].i_pitch
 172                                  - p_dest->p[1].i_visible_pitch;
 173     const int i_source_margin = p_source->p->i_pitch
 174                                - p_source->p->i_visible_pitch;
 175
 176     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 177     {
 178         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 179         {
 180 #define C_YVYU_YUV422( p_line, p_y, p_u, p_v )      \
 181             *p_y++ = *p_line++; *p_v++ = *p_line++; \
 182             *p_y++ = *p_line++; *p_u++ = *p_line++
 183             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 184             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 185             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 186             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 187         }
 188         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 189         {
 190             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 191         }
 192         p_line += i_source_margin;
 193         p_y += i_dest_margin;
 194         p_u += i_dest_margin_c;
 195         p_v += i_dest_margin_c;
 196     }
 197 }
 198
 199 /*****************************************************************************
 200  * UYVY_I422: packed UYVY 4:2:2 to planar YUV 4:2:2
 201  *****************************************************************************/
 202 static void UYVY_I422( filter_t *p_filter, picture_t *p_source,
 203                                            picture_t *p_dest )
 204 {
 205     uint8_t *p_line = p_source->p->p_pixels;
 206
 207     uint8_t *p_y = p_dest->Y_PIXELS;
 208     uint8_t *p_u = p_dest->U_PIXELS;
 209     uint8_t *p_v = p_dest->V_PIXELS;
 210
 211     int i_x, i_y;
 212
 213     const int i_dest_margin = p_dest->p[0].i_pitch
 214                                  - p_dest->p[0].i_visible_pitch;
 215     const int i_dest_margin_c = p_dest->p[1].i_pitch
 216                                  - p_dest->p[1].i_visible_pitch;
 217     const int i_source_margin = p_source->p->i_pitch
 218                                - p_source->p->i_visible_pitch;
 219
 220     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 221     {
 222         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 223         {
 224 #define C_UYVY_YUV422( p_line, p_y, p_u, p_v )      \
 225             *p_u++ = *p_line++; *p_y++ = *p_line++; \
 226             *p_v++ = *p_line++; *p_y++ = *p_line++
 227             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 228             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 229             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 230             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 231         }
 232         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 233         {
 234             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 235         }
 236         p_line += i_source_margin;
 237         p_y += i_dest_margin;
 238         p_u += i_dest_margin_c;
 239         p_v += i_dest_margin_c;
 240     }
 241 }
 242
 243 /*****************************************************************************
 244  * cyuv_I422: upside-down packed UYVY 4:2:2 to planar YUV 4:2:2
 245  * FIXME
 246  *****************************************************************************/
 247 static void cyuv_I422( filter_t *p_filter, picture_t *p_source,
 248                                            picture_t *p_dest )
 249 {
 250     uint8_t *p_line = p_source->p->p_pixels;
 251
 252     uint8_t *p_y = p_dest->Y_PIXELS;
 253     uint8_t *p_u = p_dest->U_PIXELS;
 254     uint8_t *p_v = p_dest->V_PIXELS;
 255
 256     int i_x, i_y;
 257
 258     const int i_dest_margin = p_dest->p[0].i_pitch
 259                                  - p_dest->p[0].i_visible_pitch;
 260     const int i_dest_margin_c = p_dest->p[1].i_pitch
 261                                  - p_dest->p[1].i_visible_pitch;
 262     const int i_source_margin = p_source->p->i_pitch
 263                                - p_source->p->i_visible_pitch;
 264
 265     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 266     {
 267         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 268         {
 269 #define C_cyuv_YUV422( p_line, p_y, p_u, p_v )      \
 270             *p_y++ = *p_line++; *p_v++ = *p_line++; \
 271             *p_y++ = *p_line++; *p_u++ = *p_line++
 272             C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 273             C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 274             C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 275             C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 276         }
 277         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 278         {
 279             C_cyuv_YUV422( p_line, p_y, p_u, p_v );
 280         }
 281         p_line += i_source_margin;
 282         p_y += i_dest_margin;
 283         p_u += i_dest_margin_c;
 284         p_v += i_dest_margin_c;
 285     }
 286 }