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 VLC authors and VideoLAN
   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 it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * 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"
  37 #define DEST_FOURCC  "I422"
  38
  39 /*****************************************************************************
  40  * Local and extern prototypes.
  41  *****************************************************************************/
  42 static int  Activate ( vlc_object_t * );
  43
  44 static void YUY2_I422           ( filter_t *, picture_t *, picture_t * );
  45 static void YVYU_I422           ( filter_t *, picture_t *, picture_t * );
  46 static void UYVY_I422           ( filter_t *, picture_t *, picture_t * );
  47 static picture_t *YUY2_I422_Filter    ( filter_t *, picture_t * );
  48 static picture_t *YVYU_I422_Filter    ( filter_t *, picture_t * );
  49 static picture_t *UYVY_I422_Filter    ( filter_t *, picture_t * );
  50
  51 /*****************************************************************************
  52  * Module descriptor
  53  *****************************************************************************/
  54 vlc_module_begin ()
  55     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
  56     set_capability( "video filter2", 80 )
  57     set_callbacks( Activate, NULL )
  58 vlc_module_end ()
  59
  60 /*****************************************************************************
  61  * Activate: allocate a chroma function
  62  *****************************************************************************
  63  * This function allocates and initializes a chroma function
  64  *****************************************************************************/
  65 static int Activate( vlc_object_t *p_this )
  66 {
  67     filter_t *p_filter = (filter_t *)p_this;
  68
  69     if( p_filter->fmt_in.video.i_width & 1
  70      || p_filter->fmt_in.video.i_height & 1 )
  71     {
  72         return -1;
  73     }
  74
  75     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width
  76      || p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height
  77      || p_filter->fmt_in.video.orientation != p_filter->fmt_out.video.orientation)
  78         return -1;
  79
  80     switch( p_filter->fmt_out.video.i_chroma )
  81     {
  82         case VLC_CODEC_I422:
  83             switch( p_filter->fmt_in.video.i_chroma )
  84             {
  85                 case VLC_CODEC_YUYV:
  86                     p_filter->pf_video_filter = YUY2_I422_Filter;
  87                     break;
  88
  89                 case VLC_CODEC_YVYU:
  90                     p_filter->pf_video_filter = YVYU_I422_Filter;
  91                     break;
  92
  93                 case VLC_CODEC_UYVY:
  94                     p_filter->pf_video_filter = UYVY_I422_Filter;
  95                     break;
  96
  97                 default:
  98                     return -1;
  99             }
 100             break;
 101
 102         default:
 103             return -1;
 104     }
 105     return 0;
 106 }
 107
 108 /* Following functions are local */
 109
 110 VIDEO_FILTER_WRAPPER( YUY2_I422 )
 111 VIDEO_FILTER_WRAPPER( YVYU_I422 )
 112 VIDEO_FILTER_WRAPPER( UYVY_I422 )
 113
 114 /*****************************************************************************
 115  * YUY2_I422: packed YUY2 4:2:2 to planar YUV 4:2:2
 116  *****************************************************************************/
 117 static void YUY2_I422( filter_t *p_filter, picture_t *p_source,
 118                                            picture_t *p_dest )
 119 {
 120     uint8_t *p_line = p_source->p->p_pixels;
 121
 122     uint8_t *p_y = p_dest->Y_PIXELS;
 123     uint8_t *p_u = p_dest->U_PIXELS;
 124     uint8_t *p_v = p_dest->V_PIXELS;
 125
 126     int i_x, i_y;
 127
 128     const int i_dest_margin = p_dest->p[0].i_pitch
 129                                  - p_dest->p[0].i_visible_pitch;
 130     const int i_dest_margin_c = p_dest->p[1].i_pitch
 131                                  - p_dest->p[1].i_visible_pitch;
 132     const int i_source_margin = p_source->p->i_pitch
 133                                - p_source->p->i_visible_pitch;
 134
 135     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 136     {
 137         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 138         {
 139 #define C_YUYV_YUV422( p_line, p_y, p_u, p_v )      \
 140             *p_y++ = *p_line++; *p_u++ = *p_line++; \
 141             *p_y++ = *p_line++; *p_v++ = *p_line++
 142             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 143             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 144             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 145             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 146         }
 147         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 148         {
 149             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 150         }
 151         p_line += i_source_margin;
 152         p_y += i_dest_margin;
 153         p_u += i_dest_margin_c;
 154         p_v += i_dest_margin_c;
 155     }
 156 }
 157
 158 /*****************************************************************************
 159  * YVYU_I422: packed YVYU 4:2:2 to planar YUV 4:2:2
 160  *****************************************************************************/
 161 static void YVYU_I422( filter_t *p_filter, picture_t *p_source,
 162                                            picture_t *p_dest )
 163 {
 164     uint8_t *p_line = p_source->p->p_pixels;
 165
 166     uint8_t *p_y = p_dest->Y_PIXELS;
 167     uint8_t *p_u = p_dest->U_PIXELS;
 168     uint8_t *p_v = p_dest->V_PIXELS;
 169
 170     int i_x, i_y;
 171
 172     const int i_dest_margin = p_dest->p[0].i_pitch
 173                                  - p_dest->p[0].i_visible_pitch;
 174     const int i_dest_margin_c = p_dest->p[1].i_pitch
 175                                  - p_dest->p[1].i_visible_pitch;
 176     const int i_source_margin = p_source->p->i_pitch
 177                                - p_source->p->i_visible_pitch;
 178
 179     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 180     {
 181         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 182         {
 183 #define C_YVYU_YUV422( p_line, p_y, p_u, p_v )      \
 184             *p_y++ = *p_line++; *p_v++ = *p_line++; \
 185             *p_y++ = *p_line++; *p_u++ = *p_line++
 186             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 187             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 188             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 189             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 190         }
 191         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 192         {
 193             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 194         }
 195         p_line += i_source_margin;
 196         p_y += i_dest_margin;
 197         p_u += i_dest_margin_c;
 198         p_v += i_dest_margin_c;
 199     }
 200 }
 201
 202 /*****************************************************************************
 203  * UYVY_I422: packed UYVY 4:2:2 to planar YUV 4:2:2
 204  *****************************************************************************/
 205 static void UYVY_I422( filter_t *p_filter, picture_t *p_source,
 206                                            picture_t *p_dest )
 207 {
 208     uint8_t *p_line = p_source->p->p_pixels;
 209
 210     uint8_t *p_y = p_dest->Y_PIXELS;
 211     uint8_t *p_u = p_dest->U_PIXELS;
 212     uint8_t *p_v = p_dest->V_PIXELS;
 213
 214     int i_x, i_y;
 215
 216     const int i_dest_margin = p_dest->p[0].i_pitch
 217                                  - p_dest->p[0].i_visible_pitch;
 218     const int i_dest_margin_c = p_dest->p[1].i_pitch
 219                                  - p_dest->p[1].i_visible_pitch;
 220     const int i_source_margin = p_source->p->i_pitch
 221                                - p_source->p->i_visible_pitch;
 222
 223     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 224     {
 225         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 226         {
 227 #define C_UYVY_YUV422( p_line, p_y, p_u, p_v )      \
 228             *p_u++ = *p_line++; *p_y++ = *p_line++; \
 229             *p_v++ = *p_line++; *p_y++ = *p_line++
 230             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 231             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 232             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 233             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 234         }
 235         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 236         {
 237             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 238         }
 239         p_line += i_source_margin;
 240         p_y += i_dest_margin;
 241         p_u += i_dest_margin_c;
 242         p_v += i_dest_margin_c;
 243     }
 244 }