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 #include <vlc_picture.h>
  36
  37 #define SRC_FOURCC "YUY2,YUNV,YVYU,UYVY,UYNV,Y422"
  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 picture_t *YUY2_I422_Filter    ( filter_t *, picture_t * );
  49 static picture_t *YVYU_I422_Filter    ( filter_t *, picture_t * );
  50 static picture_t *UYVY_I422_Filter    ( filter_t *, picture_t * );
  51
  52 /*****************************************************************************
  53  * Module descriptor
  54  *****************************************************************************/
  55 vlc_module_begin ()
  56     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
  57     set_capability( "video converter", 80 )
  58     set_callbacks( Activate, NULL )
  59 vlc_module_end ()
  60
  61 /*****************************************************************************
  62  * Activate: allocate a chroma function
  63  *****************************************************************************
  64  * This function allocates and initializes a chroma function
  65  *****************************************************************************/
  66 static int Activate( vlc_object_t *p_this )
  67 {
  68     filter_t *p_filter = (filter_t *)p_this;
  69
  70     if( p_filter->fmt_in.video.i_width & 1
  71      || p_filter->fmt_in.video.i_height & 1 )
  72     {
  73         return -1;
  74     }
  75
  76     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width
  77      || p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height
  78      || p_filter->fmt_in.video.orientation != p_filter->fmt_out.video.orientation)
  79         return -1;
  80
  81     switch( p_filter->fmt_out.video.i_chroma )
  82     {
  83         case VLC_CODEC_I422:
  84             switch( p_filter->fmt_in.video.i_chroma )
  85             {
  86                 case VLC_CODEC_YUYV:
  87                     p_filter->pf_video_filter = YUY2_I422_Filter;
  88                     break;
  89
  90                 case VLC_CODEC_YVYU:
  91                     p_filter->pf_video_filter = YVYU_I422_Filter;
  92                     break;
  93
  94                 case VLC_CODEC_UYVY:
  95                     p_filter->pf_video_filter = UYVY_I422_Filter;
  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 VIDEO_FILTER_WRAPPER( YUY2_I422 )
 112 VIDEO_FILTER_WRAPPER( YVYU_I422 )
 113 VIDEO_FILTER_WRAPPER( UYVY_I422 )
 114
 115 /*****************************************************************************
 116  * YUY2_I422: packed YUY2 4:2:2 to planar YUV 4:2:2
 117  *****************************************************************************/
 118 static void YUY2_I422( filter_t *p_filter, picture_t *p_source,
 119                                            picture_t *p_dest )
 120 {
 121     uint8_t *p_line = p_source->p->p_pixels;
 122
 123     uint8_t *p_y = p_dest->Y_PIXELS;
 124     uint8_t *p_u = p_dest->U_PIXELS;
 125     uint8_t *p_v = p_dest->V_PIXELS;
 126
 127     int i_x, i_y;
 128
 129     const int i_dest_margin = p_dest->p[0].i_pitch
 130                                  - p_dest->p[0].i_visible_pitch;
 131     const int i_dest_margin_c = p_dest->p[1].i_pitch
 132                                  - p_dest->p[1].i_visible_pitch;
 133     const int i_source_margin = p_source->p->i_pitch
 134                                - p_source->p->i_visible_pitch;
 135
 136     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 137     {
 138         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 139         {
 140 #define C_YUYV_YUV422( p_line, p_y, p_u, p_v )      \
 141             *p_y++ = *p_line++; *p_u++ = *p_line++; \
 142             *p_y++ = *p_line++; *p_v++ = *p_line++
 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             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 147         }
 148         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 149         {
 150             C_YUYV_YUV422( p_line, p_y, p_u, p_v );
 151         }
 152         p_line += i_source_margin;
 153         p_y += i_dest_margin;
 154         p_u += i_dest_margin_c;
 155         p_v += i_dest_margin_c;
 156     }
 157 }
 158
 159 /*****************************************************************************
 160  * YVYU_I422: packed YVYU 4:2:2 to planar YUV 4:2:2
 161  *****************************************************************************/
 162 static void YVYU_I422( filter_t *p_filter, picture_t *p_source,
 163                                            picture_t *p_dest )
 164 {
 165     uint8_t *p_line = p_source->p->p_pixels;
 166
 167     uint8_t *p_y = p_dest->Y_PIXELS;
 168     uint8_t *p_u = p_dest->U_PIXELS;
 169     uint8_t *p_v = p_dest->V_PIXELS;
 170
 171     int i_x, i_y;
 172
 173     const int i_dest_margin = p_dest->p[0].i_pitch
 174                                  - p_dest->p[0].i_visible_pitch;
 175     const int i_dest_margin_c = p_dest->p[1].i_pitch
 176                                  - p_dest->p[1].i_visible_pitch;
 177     const int i_source_margin = p_source->p->i_pitch
 178                                - p_source->p->i_visible_pitch;
 179
 180     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 181     {
 182         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 183         {
 184 #define C_YVYU_YUV422( p_line, p_y, p_u, p_v )      \
 185             *p_y++ = *p_line++; *p_v++ = *p_line++; \
 186             *p_y++ = *p_line++; *p_u++ = *p_line++
 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             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 191         }
 192         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 193         {
 194             C_YVYU_YUV422( p_line, p_y, p_u, p_v );
 195         }
 196         p_line += i_source_margin;
 197         p_y += i_dest_margin;
 198         p_u += i_dest_margin_c;
 199         p_v += i_dest_margin_c;
 200     }
 201 }
 202
 203 /*****************************************************************************
 204  * UYVY_I422: packed UYVY 4:2:2 to planar YUV 4:2:2
 205  *****************************************************************************/
 206 static void UYVY_I422( filter_t *p_filter, picture_t *p_source,
 207                                            picture_t *p_dest )
 208 {
 209     uint8_t *p_line = p_source->p->p_pixels;
 210
 211     uint8_t *p_y = p_dest->Y_PIXELS;
 212     uint8_t *p_u = p_dest->U_PIXELS;
 213     uint8_t *p_v = p_dest->V_PIXELS;
 214
 215     int i_x, i_y;
 216
 217     const int i_dest_margin = p_dest->p[0].i_pitch
 218                                  - p_dest->p[0].i_visible_pitch;
 219     const int i_dest_margin_c = p_dest->p[1].i_pitch
 220                                  - p_dest->p[1].i_visible_pitch;
 221     const int i_source_margin = p_source->p->i_pitch
 222                                - p_source->p->i_visible_pitch;
 223
 224     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
 225     {
 226         for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
 227         {
 228 #define C_UYVY_YUV422( p_line, p_y, p_u, p_v )      \
 229             *p_u++ = *p_line++; *p_y++ = *p_line++; \
 230             *p_v++ = *p_line++; *p_y++ = *p_line++
 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             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 235         }
 236         for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
 237         {
 238             C_UYVY_YUV422( p_line, p_y, p_u, p_v );
 239         }
 240         p_line += i_source_margin;
 241         p_y += i_dest_margin;
 242         p_u += i_dest_margin_c;
 243         p_v += i_dest_margin_c;
 244     }
 245 }