git.sesse.net Git - vlc/blob - plugins/yuv/video_yuv16.c

   1 /*****************************************************************************
   2  * video_yuv16.c: YUV transformation functions for 16bpp
   3  * Provides functions to perform the YUV conversion. The functions provided here
   4  * are a complete and portable C implementation, and may be replaced in certain
   5  * case by optimized functions.
   6  *****************************************************************************
   7  * Copyright (C) 1999, 2000 VideoLAN
   8  *
   9  * Authors:
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public
  22  * License along with this program; if not, write to the
  23  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24  * Boston, MA 02111-1307, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include "defs.h"
  31
  32 #include <math.h>                                            /* exp(), pow() */
  33 #include <errno.h>                                                 /* ENOMEM */
  34 #include <stdlib.h>                                                /* free() */
  35 #include <string.h>                                            /* strerror() */
  36
  37 #include "config.h"
  38 #include "common.h"
  39 #include "threads.h"
  40 #include "mtime.h"
  41 #include "plugins.h"
  42 #include "video.h"
  43 #include "video_output.h"
  44 #include "video_yuv.h"
  45 #include "video_yuv_macros.h"
  46
  47 #include "intf_msg.h"
  48
  49 /*****************************************************************************
  50  * ConvertY4Gray16: grayscale YUV 4:x:x to RGB 2 Bpp
  51  *****************************************************************************/
  52 void ConvertY4Gray16( YUV_ARGS_16BPP )
  53 {
  54     boolean_t   b_horizontal_scaling;             /* horizontal scaling type */
  55     int         i_vertical_scaling;                 /* vertical scaling type */
  56     int         i_x, i_y;                 /* horizontal and vertical indexes */
  57     int         i_scale_count;                       /* scale modulo counter */
  58     int         i_chroma_width;                    /* chroma width, not used */
  59     u16 *       p_gray;                             /* base conversion table */
  60     u16 *       p_pic_start;       /* beginning of the current line for copy */
  61     u16 *       p_buffer_start;                   /* conversion buffer start */
  62     u16 *       p_buffer;                       /* conversion buffer pointer */
  63     int *       p_offset_start;                        /* offset array start */
  64     int *       p_offset;                            /* offset array pointer */
  65
  66     /*
  67      * Initialize some values  - i_pic_line_width will store the line skip
  68      */
  69     i_pic_line_width -= i_pic_width;
  70     p_gray =            p_vout->yuv.yuv.p_gray16;
  71     p_buffer_start =    p_vout->yuv.p_buffer;
  72     p_offset_start =    p_vout->yuv.p_offset;
  73     SetOffset( i_width, i_height, i_pic_width, i_pic_height,
  74                &b_horizontal_scaling, &i_vertical_scaling, p_offset_start );
  75
  76     p_y = p_v;
  77     i_height /= 4;
  78     /*
  79      * Perform conversion
  80      */
  81     i_scale_count = i_pic_height;
  82     for( i_y = 0; i_y < i_height; i_y++ )
  83     {
  84         /* Mark beginnning of line for possible later line copy, and initialize
  85          * buffer */
  86         p_pic_start =   p_pic;
  87         p_buffer =      b_horizontal_scaling ? p_buffer_start : p_pic;
  88
  89         /* Do YUV conversion to buffer - YUV picture is always formed of 16
  90          * pixels wide blocks */
  91         for( i_x = i_width / 16; i_x--;  )
  92         {
  93             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
  94             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
  95             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
  96             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
  97             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
  98             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
  99             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
 100             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
 101         }
 102
 103         /* Do horizontal and vertical scaling */
 104         SCALE_WIDTH;
 105         SCALE_HEIGHT(400, 2);
 106     }
 107 }
 108
 109 /*****************************************************************************
 110  * ConvertYUV420RGB16: color YUV 4:2:0 to RGB 2 Bpp
 111  *****************************************************************************/
 112 void ConvertYUV420RGB16( YUV_ARGS_16BPP )
 113 {
 114     boolean_t   b_horizontal_scaling;             /* horizontal scaling type */
 115     int         i_vertical_scaling;                 /* vertical scaling type */
 116     int         i_x, i_y;                 /* horizontal and vertical indexes */
 117     int         i_scale_count;                       /* scale modulo counter */
 118     int         i_uval, i_vval;                           /* U and V samples */
 119     int         i_red, i_green, i_blue;          /* U and V modified samples */
 120     int         i_chroma_width;                              /* chroma width */
 121     u16 *       p_yuv;                              /* base conversion table */
 122     u16 *       p_ybase;                     /* Y dependant conversion table */
 123     u16 *       p_pic_start;       /* beginning of the current line for copy */
 124     u16 *       p_buffer_start;                   /* conversion buffer start */
 125     u16 *       p_buffer;                       /* conversion buffer pointer */
 126     int *       p_offset_start;                        /* offset array start */
 127     int *       p_offset;                            /* offset array pointer */
 128
 129     /*
 130      * Initialize some values  - i_pic_line_width will store the line skip
 131      */
 132     i_pic_line_width -= i_pic_width;
 133     i_chroma_width =    i_width / 2;
 134     p_yuv =             p_vout->yuv.yuv.p_rgb16;
 135     p_buffer_start =    p_vout->yuv.p_buffer;
 136     p_offset_start =    p_vout->yuv.p_offset;
 137     SetOffset( i_width, i_height, i_pic_width, i_pic_height,
 138                &b_horizontal_scaling, &i_vertical_scaling, p_offset_start );
 139
 140     /*
 141      * Perform conversion
 142      */
 143     i_scale_count = i_pic_height;
 144     for( i_y = 0; i_y < i_height; i_y++ )
 145     {
 146         /* Mark beginnning of line for possible later line copy, and initialize
 147          * buffer */
 148         p_pic_start =   p_pic;
 149         p_buffer =      b_horizontal_scaling ? p_buffer_start : p_pic;
 150
 151         /* Do YUV conversion to buffer - YUV picture is always formed of 16
 152          * pixels wide blocks */
 153         for( i_x = i_width / 16; i_x--;  )
 154         {
 155             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 156             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 157             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 158             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 159             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 160             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 161             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 162             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 163         }
 164
 165         /* Do horizontal and vertical scaling */
 166         SCALE_WIDTH;
 167         SCALE_HEIGHT(420, 2);
 168     }
 169 }
 170
 171 /*****************************************************************************
 172  * ConvertYUV422RGB16: color YUV 4:2:2 to RGB 2 Bpp
 173  *****************************************************************************/
 174 void ConvertYUV422RGB16( YUV_ARGS_16BPP )
 175 {
 176     boolean_t   b_horizontal_scaling;             /* horizontal scaling type */
 177     int         i_vertical_scaling;                 /* vertical scaling type */
 178     int         i_x, i_y;                 /* horizontal and vertical indexes */
 179     int         i_scale_count;                       /* scale modulo counter */
 180     int         i_uval, i_vval;                           /* U and V samples */
 181     int         i_red, i_green, i_blue;          /* U and V modified samples */
 182     int         i_chroma_width;                              /* chroma width */
 183     u16 *       p_yuv;                              /* base conversion table */
 184     u16 *       p_ybase;                     /* Y dependant conversion table */
 185     u16 *       p_pic_start;       /* beginning of the current line for copy */
 186     u16 *       p_buffer_start;                   /* conversion buffer start */
 187     u16 *       p_buffer;                       /* conversion buffer pointer */
 188     int *       p_offset_start;                        /* offset array start */
 189     int *       p_offset;                            /* offset array pointer */
 190
 191     /*
 192      * Initialize some values  - i_pic_line_width will store the line skip
 193      */
 194     i_pic_line_width -= i_pic_width;
 195     i_chroma_width =    i_width / 2;
 196     p_yuv =             p_vout->yuv.yuv.p_rgb16;
 197     p_buffer_start =    p_vout->yuv.p_buffer;
 198     p_offset_start =    p_vout->yuv.p_offset;
 199     SetOffset( i_width, i_height, i_pic_width, i_pic_height,
 200                &b_horizontal_scaling, &i_vertical_scaling, p_offset_start );
 201
 202     /*
 203      * Perform conversion
 204      */
 205     i_scale_count = i_pic_height;
 206     for( i_y = 0; i_y < i_height; i_y++ )
 207     {
 208         /* Mark beginnning of line for possible later line copy, and initialize
 209          * buffer */
 210         p_pic_start =   p_pic;
 211         p_buffer =      b_horizontal_scaling ? p_buffer_start : p_pic;
 212
 213         /* Do YUV conversion to buffer - YUV picture is always formed of 16
 214          * pixels wide blocks */
 215         for( i_x = i_width / 16; i_x--;  )
 216         {
 217             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 218             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 219             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 220             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 221             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 222             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 223             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 224             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 225         }
 226
 227         /* Do horizontal and vertical scaling */
 228         SCALE_WIDTH;
 229         SCALE_HEIGHT(422, 2);
 230     }
 231 }
 232
 233 /*****************************************************************************
 234  * ConvertYUV444RGB16: color YUV 4:4:4 to RGB 2 Bpp
 235  *****************************************************************************/
 236 void ConvertYUV444RGB16( YUV_ARGS_16BPP )
 237 {
 238     boolean_t   b_horizontal_scaling;             /* horizontal scaling type */
 239     int         i_vertical_scaling;                 /* vertical scaling type */
 240     int         i_x, i_y;                 /* horizontal and vertical indexes */
 241     int         i_scale_count;                       /* scale modulo counter */
 242     int         i_uval, i_vval;                           /* U and V samples */
 243     int         i_red, i_green, i_blue;          /* U and V modified samples */
 244     int         i_chroma_width;                    /* chroma width, not used */
 245     u16 *       p_yuv;                              /* base conversion table */
 246     u16 *       p_ybase;                     /* Y dependant conversion table */
 247     u16 *       p_pic_start;       /* beginning of the current line for copy */
 248     u16 *       p_buffer_start;                   /* conversion buffer start */
 249     u16 *       p_buffer;                       /* conversion buffer pointer */
 250     int *       p_offset_start;                        /* offset array start */
 251     int *       p_offset;                            /* offset array pointer */
 252
 253     /*
 254      * Initialize some values  - i_pic_line_width will store the line skip
 255      */
 256     i_pic_line_width -= i_pic_width;
 257     p_yuv =             p_vout->yuv.yuv.p_rgb16;
 258     p_buffer_start =    p_vout->yuv.p_buffer;
 259     p_offset_start =    p_vout->yuv.p_offset;
 260     SetOffset( i_width, i_height, i_pic_width, i_pic_height,
 261                &b_horizontal_scaling, &i_vertical_scaling, p_offset_start );
 262
 263     /*
 264      * Perform conversion
 265      */
 266     i_scale_count = i_pic_height;
 267     for( i_y = 0; i_y < i_height; i_y++ )
 268     {
 269         /* Mark beginnning of line for possible later line copy, and initialize
 270          * buffer */
 271         p_pic_start =   p_pic;
 272         p_buffer =      b_horizontal_scaling ? p_buffer_start : p_pic;
 273
 274         /* Do YUV conversion to buffer - YUV picture is always formed of 16
 275          * pixels wide blocks */
 276         for( i_x = i_width / 16; i_x--;  )
 277         {
 278             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 279             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 280             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 281             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 282             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 283             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 284             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 285             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 286         }
 287
 288         /* Do horizontal and vertical scaling */
 289         SCALE_WIDTH;
 290         SCALE_HEIGHT(444, 2);
 291     }
 292 }
 293