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  * chroma_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 chroma_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 E_(I420_RGB8)         ( vout_thread_t *, picture_t *, picture_t * );
  60 void E_(I420_RGB16_dither) ( vout_thread_t *, picture_t *, picture_t * );
  61 void E_(I420_RGB16)        ( vout_thread_t *, picture_t *, picture_t * );
  62 void E_(I420_RGB32)        ( vout_thread_t *, picture_t *, picture_t * );
  63 #else // if defined(MODULE_NAME_IS_i420_rgb_mmx)
  64 void E_(I420_R5G5B5)       ( vout_thread_t *, picture_t *, picture_t * );
  65 void E_(I420_R5G6B5)       ( vout_thread_t *, picture_t *, picture_t * );
  66 void E_(I420_A8R8G8B8)     ( vout_thread_t *, picture_t *, picture_t * );
  67 void E_(I420_R8G8B8A8)     ( vout_thread_t *, picture_t *, picture_t * );
  68 void E_(I420_B8G8R8A8)     ( vout_thread_t *, picture_t *, picture_t * );
  69 void E_(I420_A8B8G8R8)     ( vout_thread_t *, picture_t *, picture_t * );
  70 #endif
  71
  72 /*****************************************************************************
  73  * CONVERT_*_PIXEL: pixel conversion macros
  74  *****************************************************************************
  75  * These conversion routines are used by YUV conversion functions.
  76  * conversion are made from p_y, p_u, p_v, which are modified, to p_buffer,
  77  * which is also modified. CONVERT_4YUV_PIXEL is used for 8bpp dithering,
  78  * CONVERT_4YUV_PIXEL_SCALE does the same but also scales the output.
  79  *****************************************************************************/
  80 #define CONVERT_Y_PIXEL( BPP )                                                \
  81     /* Only Y sample is present */                                            \
  82     p_ybase = p_yuv + *p_y++;                                                 \
  83     *p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128)>>SHIFT) + i_red] |     \
  84         p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128)>>SHIFT)       \
  85         + i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128)>>SHIFT) + i_blue];
  86
  87 #define CONVERT_YUV_PIXEL( BPP )                                              \
  88     /* Y, U and V samples are present */                                      \
  89     i_uval =    *p_u++;                                                       \
  90     i_vval =    *p_v++;                                                       \
  91     i_red =     (V_RED_COEF * i_vval) >> SHIFT;                               \
  92     i_green =   (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT;     \
  93     i_blue =    (U_BLUE_COEF * i_uval) >> SHIFT;                              \
  94     CONVERT_Y_PIXEL( BPP )                                                    \
  95
  96 #define CONVERT_Y_PIXEL_DITHER( BPP )                                         \
  97     /* Only Y sample is present */                                            \
  98     p_ybase = p_yuv + *p_y++;                                                 \
  99     *p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128+p_dither[i_real_y])>>SHIFT) + i_red] |     \
 100         p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128+p_dither[i_real_y])>>SHIFT)       \
 101         + i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128+p_dither[i_real_y])>>SHIFT) + i_blue];
 102
 103 #define CONVERT_YUV_PIXEL_DITHER( BPP )                                       \
 104     /* Y, U and V samples are present */                                      \
 105     i_uval =    *p_u++;                                                       \
 106     i_vval =    *p_v++;                                                       \
 107     i_red =     (V_RED_COEF * i_vval) >> SHIFT;                               \
 108     i_green =   (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT;     \
 109     i_blue =    (U_BLUE_COEF * i_uval) >> SHIFT;                              \
 110     CONVERT_Y_PIXEL_DITHER( BPP )                                             \
 111
 112 #define CONVERT_4YUV_PIXEL( CHROMA )                                          \
 113     *p_pic++ = p_lookup[                                                      \
 114         (((*p_y++ + dither10[i_real_y]) >> 4) << 7)                           \
 115       + ((*p_u + dither20[i_real_y]) >> 5) * 9                                \
 116       + ((*p_v + dither20[i_real_y]) >> 5) ];                                 \
 117     *p_pic++ = p_lookup[                                                      \
 118         (((*p_y++ + dither11[i_real_y]) >> 4) << 7)                           \
 119       + ((*p_u++ + dither21[i_real_y]) >> 5) * 9                              \
 120       + ((*p_v++ + dither21[i_real_y]) >> 5) ];                               \
 121     *p_pic++ = p_lookup[                                                      \
 122         (((*p_y++ + dither12[i_real_y]) >> 4) << 7)                           \
 123       + ((*p_u + dither22[i_real_y]) >> 5) * 9                                \
 124       + ((*p_v + dither22[i_real_y]) >> 5) ];                                 \
 125     *p_pic++ = p_lookup[                                                      \
 126         (((*p_y++ + dither13[i_real_y]) >> 4) << 7)                           \
 127       + ((*p_u++ + dither23[i_real_y]) >> 5) * 9                              \
 128       + ((*p_v++ + dither23[i_real_y]) >> 5) ];                               \
 129
 130 #define CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                    \
 131     *p_pic++ = p_lookup[                                                      \
 132         ( ((*p_y + dither10[i_real_y]) >> 4) << 7)                            \
 133         + ((*p_u + dither20[i_real_y]) >> 5) * 9                              \
 134         + ((*p_v + dither20[i_real_y]) >> 5) ];                               \
 135     p_y += *p_offset++;                                                       \
 136     p_u += *p_offset;                                                         \
 137     p_v += *p_offset++;                                                       \
 138     *p_pic++ = p_lookup[                                                      \
 139         ( ((*p_y + dither11[i_real_y]) >> 4) << 7)                            \
 140         + ((*p_u + dither21[i_real_y]) >> 5) * 9                              \
 141         + ((*p_v + dither21[i_real_y]) >> 5) ];                               \
 142     p_y += *p_offset++;                                                       \
 143     p_u += *p_offset;                                                         \
 144     p_v += *p_offset++;                                                       \
 145     *p_pic++ = p_lookup[                                                      \
 146         ( ((*p_y + dither12[i_real_y]) >> 4) << 7)                            \
 147         + ((*p_u + dither22[i_real_y]) >> 5) * 9                              \
 148         + ((*p_v + dither22[i_real_y]) >> 5) ];                               \
 149     p_y += *p_offset++;                                                       \
 150     p_u += *p_offset;                                                         \
 151     p_v += *p_offset++;                                                       \
 152     *p_pic++ = p_lookup[                                                      \
 153         ( ((*p_y + dither13[i_real_y]) >> 4) << 7)                            \
 154         + ((*p_u + dither23[i_real_y]) >> 5) * 9                              \
 155         + ((*p_v + dither23[i_real_y]) >> 5) ];                               \
 156     p_y += *p_offset++;                                                       \
 157     p_u += *p_offset;                                                         \
 158     p_v += *p_offset++;                                                       \
 159
 160 /*****************************************************************************
 161  * SCALE_WIDTH: scale a line horizontally
 162  *****************************************************************************
 163  * This macro scales a line using rendering buffer and offset array. It works
 164  * for 1, 2 and 4 Bpp.
 165  *****************************************************************************/
 166 #define SCALE_WIDTH                                                           \
 167     if( b_hscale )                                                            \
 168     {                                                                         \
 169         /* Horizontal scaling, conversion has been done to buffer.            \
 170          * Rewind buffer and offset, then copy and scale line */              \
 171         p_buffer = p_buffer_start;                                            \
 172         p_offset = p_offset_start;                                            \
 173         for( i_x = p_vout->output.i_width / 16; i_x--; )                      \
 174         {                                                                     \
 175             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 176             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 177             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 178             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 179             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 180             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 181             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 182             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 183             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 184             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 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         }                                                                     \
 192         for( i_x = p_vout->output.i_width & 15; i_x--; )                      \
 193         {                                                                     \
 194             *p_pic++ = *p_buffer;   p_buffer += *p_offset++;                  \
 195         }                                                                     \
 196         p_pic = (void*)((uint8_t*)p_pic + i_right_margin );                   \
 197     }                                                                         \
 198     else                                                                      \
 199     {                                                                         \
 200         /* No scaling, conversion has been done directly in picture memory.   \
 201          * Increment of picture pointer to end of line is still needed */     \
 202         p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch );               \
 203     }                                                                         \
 204
 205 /*****************************************************************************
 206  * SCALE_WIDTH_DITHER: scale a line horizontally for dithered 8 bpp
 207  *****************************************************************************
 208  * This macro scales a line using an offset array.
 209  *****************************************************************************/
 210 #define SCALE_WIDTH_DITHER( CHROMA )                                          \
 211     if( b_hscale )                                                            \
 212     {                                                                         \
 213         /* Horizontal scaling - we can't use a buffer due to dithering */     \
 214         p_offset = p_offset_start;                                            \
 215         for( i_x = p_vout->output.i_width / 16; i_x--; )                      \
 216         {                                                                     \
 217             CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                \
 218             CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                \
 219             CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                \
 220             CONVERT_4YUV_PIXEL_SCALE( CHROMA )                                \
 221         }                                                                     \
 222     }                                                                         \
 223     else                                                                      \
 224     {                                                                         \
 225         for( i_x = p_vout->render.i_width / 16; i_x--;  )                     \
 226         {                                                                     \
 227             CONVERT_4YUV_PIXEL( CHROMA )                                      \
 228             CONVERT_4YUV_PIXEL( CHROMA )                                      \
 229             CONVERT_4YUV_PIXEL( CHROMA )                                      \
 230             CONVERT_4YUV_PIXEL( CHROMA )                                      \
 231         }                                                                     \
 232     }                                                                         \
 233     /* Increment of picture pointer to end of line is still needed */         \
 234     p_pic = (void*)((uint8_t*)p_pic + i_right_margin );                       \
 235                                                                               \
 236     /* Increment the Y coordinate in the matrix, modulo 4 */                  \
 237     i_real_y = (i_real_y + 1) & 0x3;                                          \
 238
 239 /*****************************************************************************
 240  * SCALE_HEIGHT: handle vertical scaling
 241  *****************************************************************************
 242  * This macro handle vertical scaling for a picture. CHROMA may be 420, 422 or
 243  * 444 for RGB conversion, or 400 for gray conversion. It works for 1, 2, 3
 244  * and 4 Bpp.
 245  *****************************************************************************/
 246 #define SCALE_HEIGHT( CHROMA, BPP )                                           \
 247     /* If line is odd, rewind 4:2:0 U and V samples */                        \
 248     if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) )                \
 249     {                                                                         \
 250         p_u -= i_chroma_width;                                                \
 251         p_v -= i_chroma_width;                                                \
 252     }                                                                         \
 253                                                                               \
 254     /*                                                                        \
 255      * Handle vertical scaling. The current line can be copied or next one    \
 256      * can be ignored.                                                        \
 257      */                                                                       \
 258     switch( i_vscale )                                                        \
 259     {                                                                         \
 260     case -1:                             /* vertical scaling factor is < 1 */ \
 261         while( (i_scale_count -= p_vout->output.i_height) > 0 )               \
 262         {                                                                     \
 263             /* Height reduction: skip next source line */                     \
 264             p_y += p_vout->render.i_width;                                    \
 265             i_y++;                                                            \
 266             if( (CHROMA == 420) || (CHROMA == 422) )                          \
 267             {                                                                 \
 268                 if( i_y & 0x1 )                                               \
 269                 {                                                             \
 270                     p_u += i_chroma_width;                                    \
 271                     p_v += i_chroma_width;                                    \
 272                 }                                                             \
 273             }                                                                 \
 274             else if( CHROMA == 444 )                                          \
 275             {                                                                 \
 276                 p_u += p_vout->render.i_width;                                \
 277                 p_v += p_vout->render.i_width;                                \
 278             }                                                                 \
 279         }                                                                     \
 280         i_scale_count += p_vout->render.i_height;                             \
 281         break;                                                                \
 282     case 1:                              /* vertical scaling factor is > 1 */ \
 283         while( (i_scale_count -= p_vout->render.i_height) > 0 )               \
 284         {                                                                     \
 285             /* Height increment: copy previous picture line */                \
 286             p_vout->p_libvlc->pf_memcpy( p_pic, p_pic_start,                     \
 287                                       p_vout->output.i_width * BPP );         \
 288             p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch );           \
 289         }                                                                     \
 290         i_scale_count += p_vout->output.i_height;                             \
 291         break;                                                                \
 292     }                                                                         \
 293
 294 /*****************************************************************************
 295  * SCALE_HEIGHT_DITHER: handle vertical scaling for dithered 8 bpp
 296  *****************************************************************************
 297  * This macro handles vertical scaling for a picture. CHROMA may be 420,
 298  * 422 or 444 for RGB conversion, or 400 for gray conversion.
 299  *****************************************************************************/
 300 #define SCALE_HEIGHT_DITHER( CHROMA )                                         \
 301                                                                               \
 302     /* If line is odd, rewind 4:2:0 U and V samples */                        \
 303     if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) )                \
 304     {                                                                         \
 305         p_u -= i_chroma_width;                                                \
 306         p_v -= i_chroma_width;                                                \
 307     }                                                                         \
 308                                                                               \
 309     /*                                                                        \
 310      * Handle vertical scaling. The current line can be copied or next one    \
 311      * can be ignored.                                                        \
 312      */                                                                       \
 313                                                                               \
 314     switch( i_vscale )                                                        \
 315     {                                                                         \
 316     case -1:                             /* vertical scaling factor is < 1 */ \
 317         while( (i_scale_count -= p_vout->output.i_height) > 0 )               \
 318         {                                                                     \
 319             /* Height reduction: skip next source line */                     \
 320             p_y += p_vout->render.i_width;                                    \
 321             i_y++;                                                            \
 322             if( (CHROMA == 420) || (CHROMA == 422) )                          \
 323             {                                                                 \
 324                 if( i_y & 0x1 )                                               \
 325                 {                                                             \
 326                     p_u += i_chroma_width;                                    \
 327                     p_v += i_chroma_width;                                    \
 328                 }                                                             \
 329             }                                                                 \
 330             else if( CHROMA == 444 )                                          \
 331             {                                                                 \
 332                 p_u += p_vout->render.i_width;                                \
 333                 p_v += p_vout->render.i_width;                                \
 334             }                                                                 \
 335         }                                                                     \
 336         i_scale_count += p_vout->render.i_height;                             \
 337         break;                                                                \
 338     case 1:                              /* vertical scaling factor is > 1 */ \
 339         while( (i_scale_count -= p_vout->render.i_height) > 0 )               \
 340         {                                                                     \
 341             p_y -= p_vout->render.i_width;                                    \
 342             p_u -= i_chroma_width;                                            \
 343             p_v -= i_chroma_width;                                            \
 344             SCALE_WIDTH_DITHER( CHROMA );                                     \
 345         }                                                                     \
 346         i_scale_count += p_vout->output.i_height;                             \
 347         break;                                                                \
 348     }                                                                         \
 349