git.sesse.net Git - vlc/blob - modules/video_chroma/i420_rgb.h

   1 /*****************************************************************************
   2  * i420_rgb.h : YUV to bitmap RGB conversion module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.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 /** Number of entries in RGB palette/colormap */
  25 #define CMAP_RGB2_SIZE 256
  26
  27 /**
  28  * filter_sys_t: chroma method descriptor
  29
  30  * This structure is part of the chroma transformation descriptor, it
  31  * describes the yuv2rgb specific properties.
  32  */
  33 struct filter_sys_t
  34 {
  35     uint8_t  *p_buffer;
  36     int *p_offset;
  37
  38 #ifdef MODULE_NAME_IS_i420_rgb
  39     /**< Pre-calculated conversion tables */
  40     void *p_base;                      /**< base for all conversion tables */
  41     uint8_t   *p_rgb8;                 /**< RGB 8 bits table */
  42     uint16_t  *p_rgb16;                /**< RGB 16 bits table */
  43     uint32_t  *p_rgb32;                /**< RGB 32 bits table */
  44
  45     /**< To get RGB value for palette entry i, use (p_rgb_r[i], p_rgb_g[i],
  46        p_rgb_b[i]). Note these are 16 bits per pixel. For 8bpp entries,
  47        shift right 8 bits.
  48     */
  49     uint16_t  p_rgb_r[CMAP_RGB2_SIZE];  /**< Red values of palette */
  50     uint16_t  p_rgb_g[CMAP_RGB2_SIZE];  /**< Green values of palette */
  51     uint16_t  p_rgb_b[CMAP_RGB2_SIZE];  /**< Blue values of palette */
  52 #endif
  53 };
  54
  55 /*****************************************************************************
  56  * Prototypes
  57  *****************************************************************************/
  58 #ifdef MODULE_NAME_IS_i420_rgb
  59 void I420_RGB8         ( filter_t *, picture_t *, picture_t * );
  60 void I420_RGB16_dither ( filter_t *, picture_t *, picture_t * );
  61 void I420_RGB16        ( filter_t *, picture_t *, picture_t * );
  62 void I420_RGB32        ( filter_t *, picture_t *, picture_t * );
  63 static picture_t *I420_RGB8_Filter         ( filter_t *, picture_t * );
  64 static picture_t *I420_RGB16_dither_Filter ( filter_t *, picture_t * );
  65 static picture_t *I420_RGB16_Filter        ( filter_t *, picture_t * );
  66 static picture_t *I420_RGB32_Filter        ( filter_t *, picture_t * );
  67 #else // if defined(MODULE_NAME_IS_i420_rgb_mmx)
  68 void I420_R5G5B5       ( filter_t *, picture_t *, picture_t * );
  69 void I420_R5G6B5       ( filter_t *, picture_t *, picture_t * );
  70 void I420_A8R8G8B8     ( filter_t *, picture_t *, picture_t * );
  71 void I420_R8G8B8A8     ( filter_t *, picture_t *, picture_t * );
  72 void I420_B8G8R8A8     ( filter_t *, picture_t *, picture_t * );
  73 void I420_A8B8G8R8     ( filter_t *, picture_t *, picture_t * );
  74 static picture_t *I420_R5G5B5_Filter       ( filter_t *, picture_t * );
  75 static picture_t *I420_R5G6B5_Filter       ( filter_t *, picture_t * );
  76 static picture_t *I420_A8R8G8B8_Filter     ( filter_t *, picture_t * );
  77 static picture_t *I420_R8G8B8A8_Filter     ( filter_t *, picture_t * );
  78 static picture_t *I420_B8G8R8A8_Filter     ( filter_t *, picture_t * );
  79 static picture_t *I420_A8B8G8R8_Filter     ( filter_t *, picture_t * );
  80 #endif
  81
  82 /*****************************************************************************
  83  * CONVERT_*_PIXEL: pixel conversion macros
  84  *****************************************************************************
  85  * These conversion routines are used by YUV conversion functions.
  86  * conversion are made from p_y, p_u, p_v, which are modified, to p_buffer,
  87  * which is also modified. CONVERT_4YUV_PIXEL is used for 8bpp dithering,
  88  * CONVERT_4YUV_PIXEL_SCALE does the same but also scales the output.
  89  *****************************************************************************/
  90 #define CONVERT_Y_PIXEL( BPP )                                                \
  91     /* Only Y sample is present */                                            \
  92     p_ybase = p_yuv + *p_y++;                                                 \
  93     *p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128)>>SHIFT) + i_red] |     \
  94         p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128)>>SHIFT)       \
  95         + i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128)>>SHIFT) + i_blue];
  96
  97 #define CONVERT_YUV_PIXEL( BPP )                                              \
  98     /* Y, U and V samples are present */                                      \
  99     i_uval =    *p_u++;                                                       \
 100     i_vval =    *p_v++;                                                       \
 101     i_red =     (V_RED_COEF * i_vval) >> SHIFT;                               \
 102     i_green =   (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT;     \
 103     i_blue =    (U_BLUE_COEF * i_uval) >> SHIFT;                              \
 104     CONVERT_Y_PIXEL( BPP )                                                    \
 105
 106 #define CONVERT_Y_PIXEL_DITHER( BPP )                                         \
 107     /* Only Y sample is present */                                            \
 108     p_ybase = p_yuv + *p_y++;                                                 \
 109     *p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128+p_dither[i_real_y])>>SHIFT) + i_red] |     \
 110         p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128+p_dither[i_real_y])>>SHIFT)       \
 111         + i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128+p_dither[i_real_y])>>SHIFT) + i_blue];
 112
 113 #define CONVERT_YUV_PIXEL_DITHER( BPP )                                       \
 114     /* Y, U and V samples are present */                                      \
 115     i_uval =    *p_u++;                                                       \
 116     i_vval =    *p_v++;                                                       \
 117     i_red =     (V_RED_COEF * i_vval) >> SHIFT;                               \
 118     i_green =   (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT;     \
 119     i_blue =    (U_BLUE_COEF * i_uval) >> SHIFT;                              \
 120     CONVERT_Y_PIXEL_DITHER( BPP )                                             \
 121
 122 #define CONVERT_4YUV_PIXEL( CHROMA )                                          \
 123     *p_pic++ = p_lookup[                                                      \
 124         (((*p_y++ + dither10[i_real_y]) >> 4) << 7)                           \
 125       + ((*p_u + dither20[i_real_y]) >> 5) * 9                                \
 126       + ((*p_v + dither20[i_real_y]) >> 5) ];                                 \
 127     *p_pic++ = p_lookup[                                                      \
 128         (((*p_y++ + dither11[i_real_y]) >> 4) << 7)                           \
 129       + ((*p_u++ + dither21[i_real_y]) >> 5) * 9                              \
 130       + ((*p_v++ + dither21[i_real_y]) >> 5) ];                               \
 131     *p_pic++ = p_lookup[                                                      \
 132         (((*p_y++ + dither12[i_real_y]) >> 4) << 7)                           \
 133       + ((*p_u + dither22[i_real_y]) >> 5) * 9                                \
 134       + ((*p_v + dither22[i_real_y]) >> 5) ];                                 \
 135     *p_pic++ = p_lookup[                                                      \
 136         (((*p_y++ + dither13[i_real_y]) >> 4) << 7)                           \
 137       + ((*p_u++ + dither23[i_real_y]) >> 5) * 9                              \
 138       + ((*p_v++ + dither23[i_real_y]) >> 5) ];                               \
 139
 140 #define CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                    \
 141     *p_pic++ = p_lookup[                                                      \
 142         ( ((*p_y + dither10[i_real_y]) >> 4) << 7)                            \
 143         + ((*p_u + dither20[i_real_y]) >> 5) * 9                              \
 144         + ((*p_v + dither20[i_real_y]) >> 5) ];                               \
 145     p_y += *p_offset++;                                                       \
 146     p_u += *p_offset;                                                         \
 147     p_v += *p_offset++;                                                       \
 148     *p_pic++ = p_lookup[                                                      \
 149         ( ((*p_y + dither11[i_real_y]) >> 4) << 7)                            \
 150         + ((*p_u + dither21[i_real_y]) >> 5) * 9                              \
 151         + ((*p_v + dither21[i_real_y]) >> 5) ];                               \
 152     p_y += *p_offset++;                                                       \
 153     p_u += *p_offset;                                                         \
 154     p_v += *p_offset++;                                                       \
 155     *p_pic++ = p_lookup[                                                      \
 156         ( ((*p_y + dither12[i_real_y]) >> 4) << 7)                            \
 157         + ((*p_u + dither22[i_real_y]) >> 5) * 9                              \
 158         + ((*p_v + dither22[i_real_y]) >> 5) ];                               \
 159     p_y += *p_offset++;                                                       \
 160     p_u += *p_offset;                                                         \
 161     p_v += *p_offset++;                                                       \
 162     *p_pic++ = p_lookup[                                                      \
 163         ( ((*p_y + dither13[i_real_y]) >> 4) << 7)                            \
 164         + ((*p_u + dither23[i_real_y]) >> 5) * 9                              \
 165         + ((*p_v + dither23[i_real_y]) >> 5) ];                               \
 166     p_y += *p_offset++;                                                       \
 167     p_u += *p_offset;                                                         \
 168     p_v += *p_offset++;                                                       \
 169
 170 /*****************************************************************************
 171  * SCALE_WIDTH: scale a line horizontally
 172  *****************************************************************************
 173  * This macro scales a line using rendering buffer and offset array. It works
 174  * for 1, 2 and 4 Bpp.
 175  *****************************************************************************/
 176 #define SCALE_WIDTH                                                           \
 177     if( b_hscale )                                                            \
 178     {                                                                         \
 179         /* Horizontal scaling, conversion has been done to buffer.            \
 180          * Rewind buffer and offset, then copy and scale line */              \
 181         p_buffer = p_buffer_start;                                            \
 182         p_offset = p_offset_start;                                            \
 183         for( i_x = p_filter->fmt_out.video.i_width / 16; i_x--; )             \
 184         {                                                                     \
 185             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 186             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 187             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 188             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 189             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 190             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 191             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 192             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 193             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 194             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 195             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 196             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 197             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 198             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 199             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 200             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 201         }                                                                     \
 202         for( i_x = p_filter->fmt_out.video.i_width & 15; i_x--; )             \
 203         {                                                                     \
 204             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 205         }                                                                     \
 206         p_pic = (void*)((uint8_t*)p_pic + i_right_margin );                   \
 207     }                                                                         \
 208     else                                                                      \
 209     {                                                                         \
 210         /* No scaling, conversion has been done directly in picture memory.   \
 211          * Increment of picture pointer to end of line is still needed */     \
 212         p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch );               \
 213     }                                                                         \
 214
 215 /*****************************************************************************
 216  * SCALE_WIDTH_DITHER: scale a line horizontally for dithered 8 bpp
 217  *****************************************************************************
 218  * This macro scales a line using an offset array.
 219  *****************************************************************************/
 220 #define SCALE_WIDTH_DITHER( CHROMA )                                          \
 221     if( b_hscale )                                                            \
 222     {                                                                         \
 223         /* Horizontal scaling - we can't use a buffer due to dithering */     \
 224         p_offset = p_offset_start;                                            \
 225         for( i_x = p_filter->fmt_out.video.i_width / 16; i_x--; )             \
 226         {                                                                     \
 227             CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                \
 228             CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                \
 229             CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                \
 230             CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                \
 231         }                                                                     \
 232     }                                                                         \
 233     else                                                                      \
 234     {                                                                         \
 235         for( i_x = p_filter->fmt_in.video.i_width / 16; i_x--;  )             \
 236         {                                                                     \
 237             CONVERT_4YUV_PIXEL( CHROMA )                                      \
 238             CONVERT_4YUV_PIXEL( CHROMA )                                      \
 239             CONVERT_4YUV_PIXEL( CHROMA )                                      \
 240             CONVERT_4YUV_PIXEL( CHROMA )                                      \
 241         }                                                                     \
 242     }                                                                         \
 243     /* Increment of picture pointer to end of line is still needed */         \
 244     p_pic = (void*)((uint8_t*)p_pic + i_right_margin );                       \
 245                                                                               \
 246     /* Increment the Y coordinate in the matrix, modulo 4 */                  \
 247     i_real_y = (i_real_y + 1) & 0x3;                                          \
 248
 249 /*****************************************************************************
 250  * SCALE_HEIGHT: handle vertical scaling
 251  *****************************************************************************
 252  * This macro handle vertical scaling for a picture. CHROMA may be 420, 422 or
 253  * 444 for RGB conversion, or 400 for gray conversion. It works for 1, 2, 3
 254  * and 4 Bpp.
 255  *****************************************************************************/
 256 #define SCALE_HEIGHT( CHROMA, BPP )                                           \
 257     /* If line is odd, rewind 4:2:0 U and V samples */                        \
 258     if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) )                \
 259     {                                                                         \
 260         p_u -= i_chroma_width;                                                \
 261         p_v -= i_chroma_width;                                                \
 262     }                                                                         \
 263                                                                               \
 264     /*                                                                        \
 265      * Handle vertical scaling. The current line can be copied or next one    \
 266      * can be ignored.                                                        \
 267      */                                                                       \
 268     switch( i_vscale )                                                        \
 269     {                                                                         \
 270     case -1:                             /* vertical scaling factor is < 1 */ \
 271         while( (i_scale_count -= p_filter->fmt_out.video.i_height) > 0 )      \
 272         {                                                                     \
 273             /* Height reduction: skip next source line */                     \
 274             p_y += p_filter->fmt_in.video.i_width;                            \
 275             i_y++;                                                            \
 276             if( (CHROMA == 420) || (CHROMA == 422) )                          \
 277             {                                                                 \
 278                 if( i_y & 0x1 )                                               \
 279                 {                                                             \
 280                     p_u += i_chroma_width;                                    \
 281                     p_v += i_chroma_width;                                    \
 282                 }                                                             \
 283             }                                                                 \
 284             else if( CHROMA == 444 )                                          \
 285             {                                                                 \
 286                 p_u += p_filter->fmt_in.video.i_width;                        \
 287                 p_v += p_filter->fmt_in.video.i_width;                        \
 288             }                                                                 \
 289         }                                                                     \
 290         i_scale_count += p_filter->fmt_in.video.i_height;                     \
 291         break;                                                                \
 292     case 1:                              /* vertical scaling factor is > 1 */ \
 293         while( (i_scale_count -= p_filter->fmt_in.video.i_height) > 0 )       \
 294         {                                                                     \
 295             /* Height increment: copy previous picture line */                \
 296             vlc_memcpy( p_pic, p_pic_start, p_filter->fmt_out.video.i_width * BPP ); \
 297             p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch );           \
 298         }                                                                     \
 299         i_scale_count += p_filter->fmt_out.video.i_height;                    \
 300         break;                                                                \
 301     }                                                                         \
 302
 303 /*****************************************************************************
 304  * SCALE_HEIGHT_DITHER: handle vertical scaling for dithered 8 bpp
 305  *****************************************************************************
 306  * This macro handles vertical scaling for a picture. CHROMA may be 420,
 307  * 422 or 444 for RGB conversion, or 400 for gray conversion.
 308  *****************************************************************************/
 309 #define SCALE_HEIGHT_DITHER( CHROMA )                                         \
 310                                                                               \
 311     /* If line is odd, rewind 4:2:0 U and V samples */                        \
 312     if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) )                \
 313     {                                                                         \
 314         p_u -= i_chroma_width;                                                \
 315         p_v -= i_chroma_width;                                                \
 316     }                                                                         \
 317                                                                               \
 318     /*                                                                        \
 319      * Handle vertical scaling. The current line can be copied or next one    \
 320      * can be ignored.                                                        \
 321      */                                                                       \
 322                                                                               \
 323     switch( i_vscale )                                                        \
 324     {                                                                         \
 325     case -1:                             /* vertical scaling factor is < 1 */ \
 326         while( (i_scale_count -= p_filter->fmt_out.video.i_height) > 0 )      \
 327         {                                                                     \
 328             /* Height reduction: skip next source line */                     \
 329             p_y += p_filter->fmt_in.video.i_width;                            \
 330             i_y++;                                                            \
 331             if( (CHROMA == 420) || (CHROMA == 422) )                          \
 332             {                                                                 \
 333                 if( i_y & 0x1 )                                               \
 334                 {                                                             \
 335                     p_u += i_chroma_width;                                    \
 336                     p_v += i_chroma_width;                                    \
 337                 }                                                             \
 338             }                                                                 \
 339             else if( CHROMA == 444 )                                          \
 340             {                                                                 \
 341                 p_u += p_filter->fmt_in.video.i_width;                        \
 342                 p_v += p_filter->fmt_in.video.i_width;                        \
 343             }                                                                 \
 344         }                                                                     \
 345         i_scale_count += p_filter->fmt_in.video.i_height;                     \
 346         break;                                                                \
 347     case 1:                              /* vertical scaling factor is > 1 */ \
 348         while( (i_scale_count -= p_filter->fmt_in.video.i_height) > 0 )       \
 349         {                                                                     \
 350             p_y -= p_filter->fmt_in.video.i_width;                            \
 351             p_u -= i_chroma_width;                                            \
 352             p_v -= i_chroma_width;                                            \
 353             SCALE_WIDTH_DITHER( CHROMA );                                     \
 354         }                                                                     \
 355         i_scale_count += p_filter->fmt_out.video.i_height;                    \
 356         break;                                                                \
 357     }                                                                         \
 358