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     /*
  77      * Perform conversion
  78      */
  79     i_scale_count = i_pic_height;
  80     for( i_y = 0; i_y < i_height; i_y++ )
  81     {
  82         /* Mark beginnning of line for possible later line copy, and initialize
  83          * buffer */
  84         p_pic_start =   p_pic;
  85         p_buffer =      b_horizontal_scaling ? p_buffer_start : p_pic;
  86
  87         /* Do YUV conversion to buffer - YUV picture is always formed of 16
  88          * pixels wide blocks */
  89         for( i_x = i_width / 16; i_x--;  )
  90         {
  91             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
  92             *p_buffer++ = p_gray[ *p_y++ ]; *p_buffer++ = p_gray[ *p_y++ ];
  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         }
 100
 101         /* Do horizontal and vertical scaling */
 102         SCALE_WIDTH;
 103         SCALE_HEIGHT(400, 2);
 104     }
 105 }
 106
 107 /*****************************************************************************
 108  * ConvertYUV420RGB16: color YUV 4:2:0 to RGB 2 Bpp
 109  *****************************************************************************/
 110 void ConvertYUV420RGB16( YUV_ARGS_16BPP )
 111 {
 112     boolean_t   b_horizontal_scaling;             /* horizontal scaling type */
 113     int         i_vertical_scaling;                 /* vertical scaling type */
 114     int         i_x, i_y;                 /* horizontal and vertical indexes */
 115     int         i_scale_count;                       /* scale modulo counter */
 116     int         i_uval, i_vval;                           /* U and V samples */
 117     int         i_red, i_green, i_blue;          /* U and V modified samples */
 118     int         i_chroma_width;                              /* chroma width */
 119     u16 *       p_yuv;                              /* base conversion table */
 120     u16 *       p_ybase;                     /* Y dependant conversion table */
 121     u16 *       p_pic_start;       /* beginning of the current line for copy */
 122     u16 *       p_buffer_start;                   /* conversion buffer start */
 123     u16 *       p_buffer;                       /* conversion buffer pointer */
 124     int *       p_offset_start;                        /* offset array start */
 125     int *       p_offset;                            /* offset array pointer */
 126
 127     /*
 128      * Initialize some values  - i_pic_line_width will store the line skip
 129      */
 130     i_pic_line_width -= i_pic_width;
 131     i_chroma_width =    i_width / 2;
 132     p_yuv =             p_vout->yuv.yuv.p_rgb16;
 133     p_buffer_start =    p_vout->yuv.p_buffer;
 134     p_offset_start =    p_vout->yuv.p_offset;
 135     SetOffset( i_width, i_height, i_pic_width, i_pic_height,
 136                &b_horizontal_scaling, &i_vertical_scaling, p_offset_start );
 137
 138     /*
 139      * Perform conversion
 140      */
 141     i_scale_count = i_pic_height;
 142     for( i_y = 0; i_y < i_height; i_y++ )
 143     {
 144         /* Mark beginnning of line for possible later line copy, and initialize
 145          * buffer */
 146         p_pic_start =   p_pic;
 147         p_buffer =      b_horizontal_scaling ? p_buffer_start : p_pic;
 148
 149         /* Do YUV conversion to buffer - YUV picture is always formed of 16
 150          * pixels wide blocks */
 151         for( i_x = i_width / 16; i_x--;  )
 152         {
 153             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 154             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 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         }
 162
 163         /* Do horizontal and vertical scaling */
 164         SCALE_WIDTH;
 165         SCALE_HEIGHT(420, 2);
 166     }
 167 }
 168
 169 /*****************************************************************************
 170  * ConvertYUV422RGB16: color YUV 4:2:2 to RGB 2 Bpp
 171  *****************************************************************************/
 172 void ConvertYUV422RGB16( YUV_ARGS_16BPP )
 173 {
 174     boolean_t   b_horizontal_scaling;             /* horizontal scaling type */
 175     int         i_vertical_scaling;                 /* vertical scaling type */
 176     int         i_x, i_y;                 /* horizontal and vertical indexes */
 177     int         i_scale_count;                       /* scale modulo counter */
 178     int         i_uval, i_vval;                           /* U and V samples */
 179     int         i_red, i_green, i_blue;          /* U and V modified samples */
 180     int         i_chroma_width;                              /* chroma width */
 181     u16 *       p_yuv;                              /* base conversion table */
 182     u16 *       p_ybase;                     /* Y dependant conversion table */
 183     u16 *       p_pic_start;       /* beginning of the current line for copy */
 184     u16 *       p_buffer_start;                   /* conversion buffer start */
 185     u16 *       p_buffer;                       /* conversion buffer pointer */
 186     int *       p_offset_start;                        /* offset array start */
 187     int *       p_offset;                            /* offset array pointer */
 188
 189     /*
 190      * Initialize some values  - i_pic_line_width will store the line skip
 191      */
 192     i_pic_line_width -= i_pic_width;
 193     i_chroma_width =    i_width / 2;
 194     p_yuv =             p_vout->yuv.yuv.p_rgb16;
 195     p_buffer_start =    p_vout->yuv.p_buffer;
 196     p_offset_start =    p_vout->yuv.p_offset;
 197     SetOffset( i_width, i_height, i_pic_width, i_pic_height,
 198                &b_horizontal_scaling, &i_vertical_scaling, p_offset_start );
 199
 200     /*
 201      * Perform conversion
 202      */
 203     i_scale_count = i_pic_height;
 204     for( i_y = 0; i_y < i_height; i_y++ )
 205     {
 206         /* Mark beginnning of line for possible later line copy, and initialize
 207          * buffer */
 208         p_pic_start =   p_pic;
 209         p_buffer =      b_horizontal_scaling ? p_buffer_start : p_pic;
 210
 211         /* Do YUV conversion to buffer - YUV picture is always formed of 16
 212          * pixels wide blocks */
 213         for( i_x = i_width / 16; i_x--;  )
 214         {
 215             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 216             CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
 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         }
 224
 225         /* Do horizontal and vertical scaling */
 226         SCALE_WIDTH;
 227         SCALE_HEIGHT(422, 2);
 228     }
 229 }
 230
 231 /*****************************************************************************
 232  * ConvertYUV444RGB16: color YUV 4:4:4 to RGB 2 Bpp
 233  *****************************************************************************/
 234 void ConvertYUV444RGB16( YUV_ARGS_16BPP )
 235 {
 236     boolean_t   b_horizontal_scaling;             /* horizontal scaling type */
 237     int         i_vertical_scaling;                 /* vertical scaling type */
 238     int         i_x, i_y;                 /* horizontal and vertical indexes */
 239     int         i_scale_count;                       /* scale modulo counter */
 240     int         i_uval, i_vval;                           /* U and V samples */
 241     int         i_red, i_green, i_blue;          /* U and V modified samples */
 242     int         i_chroma_width;                    /* chroma width, not used */
 243     u16 *       p_yuv;                              /* base conversion table */
 244     u16 *       p_ybase;                     /* Y dependant conversion table */
 245     u16 *       p_pic_start;       /* beginning of the current line for copy */
 246     u16 *       p_buffer_start;                   /* conversion buffer start */
 247     u16 *       p_buffer;                       /* conversion buffer pointer */
 248     int *       p_offset_start;                        /* offset array start */
 249     int *       p_offset;                            /* offset array pointer */
 250
 251     /*
 252      * Initialize some values  - i_pic_line_width will store the line skip
 253      */
 254     i_pic_line_width -= i_pic_width;
 255     p_yuv =             p_vout->yuv.yuv.p_rgb16;
 256     p_buffer_start =    p_vout->yuv.p_buffer;
 257     p_offset_start =    p_vout->yuv.p_offset;
 258     SetOffset( i_width, i_height, i_pic_width, i_pic_height,
 259                &b_horizontal_scaling, &i_vertical_scaling, p_offset_start );
 260
 261     /*
 262      * Perform conversion
 263      */
 264     i_scale_count = i_pic_height;
 265     for( i_y = 0; i_y < i_height; i_y++ )
 266     {
 267         /* Mark beginnning of line for possible later line copy, and initialize
 268          * buffer */
 269         p_pic_start =   p_pic;
 270         p_buffer =      b_horizontal_scaling ? p_buffer_start : p_pic;
 271
 272         /* Do YUV conversion to buffer - YUV picture is always formed of 16
 273          * pixels wide blocks */
 274         for( i_x = i_width / 16; i_x--;  )
 275         {
 276             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 277             CONVERT_YUV_PIXEL(2);  CONVERT_YUV_PIXEL(2);
 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         }
 285
 286         /* Do horizontal and vertical scaling */
 287         SCALE_WIDTH;
 288         SCALE_HEIGHT(444, 2);
 289     }
 290 }
 291