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

   1 /*****************************************************************************
   2  * i420_rgb.c : YUV to bitmap RGB conversion module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001, 2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Sam Hocevar <sam@zoy.org>
   8  *          Damien Fouilleul <damienf@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <math.h>                                            /* exp(), pow() */
  29 #include <string.h>                                            /* strerror() */
  30 #include <stdlib.h>                                      /* malloc(), free() */
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc_vout.h>
  34
  35 #include "i420_rgb.h"
  36 #if defined (MODULE_NAME_IS_i420_rgb)
  37 #   include "i420_rgb_c.h"
  38 #endif
  39
  40 /*****************************************************************************
  41  * RGB2PIXEL: assemble RGB components to a pixel value, returns a uint32_t
  42  *****************************************************************************/
  43 #define RGB2PIXEL( p_vout, i_r, i_g, i_b )          \
  44     (((((uint32_t)i_r) >> p_vout->output.i_rrshift) \
  45                        << p_vout->output.i_lrshift) \
  46    | ((((uint32_t)i_g) >> p_vout->output.i_rgshift) \
  47                        << p_vout->output.i_lgshift) \
  48    | ((((uint32_t)i_b) >> p_vout->output.i_rbshift) \
  49                        << p_vout->output.i_lbshift))
  50
  51 /*****************************************************************************
  52  * Local and extern prototypes.
  53  *****************************************************************************/
  54 static int  Activate   ( vlc_object_t * );
  55 static void Deactivate ( vlc_object_t * );
  56
  57 #if defined (MODULE_NAME_IS_i420_rgb)
  58 static void SetGammaTable       ( int *pi_table, double f_gamma );
  59 static void SetYUV              ( vout_thread_t * );
  60 static void Set8bppPalette      ( vout_thread_t *, uint8_t * );
  61 #endif
  62
  63 /*****************************************************************************
  64  * Module descriptor.
  65  *****************************************************************************/
  66 vlc_module_begin();
  67 #if defined (MODULE_NAME_IS_i420_rgb)
  68     set_description( _("I420,IYUV,YV12 to "
  69                        "RGB2,RV15,RV16,RV24,RV32 conversions") );
  70     set_capability( "chroma", 80 );
  71 #elif defined (MODULE_NAME_IS_i420_rgb_mmx)
  72     set_description( _( "MMX I420,IYUV,YV12 to "
  73                         "RV15,RV16,RV24,RV32 conversions") );
  74     set_capability( "chroma", 100 );
  75     add_requirement( MMX );
  76 #elif defined (MODULE_NAME_IS_i420_rgb_sse2)
  77     set_description( _( "SSE2 I420,IYUV,YV12 to "
  78                         "RV15,RV16,RV24,RV32 conversions") );
  79     set_capability( "chroma", 120 );
  80     add_requirement( SSE2 );
  81 #endif
  82     set_callbacks( Activate, Deactivate );
  83 vlc_module_end();
  84
  85 /*****************************************************************************
  86  * Activate: allocate a chroma function
  87  *****************************************************************************
  88  * This function allocates and initializes a chroma function
  89  *****************************************************************************/
  90 static int Activate( vlc_object_t *p_this )
  91 {
  92     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  93 #if defined (MODULE_NAME_IS_i420_rgb)
  94     size_t i_tables_size;
  95 #endif
  96
  97     if( p_vout->render.i_width & 1 || p_vout->render.i_height & 1 )
  98     {
  99         return -1;
 100     }
 101
 102     switch( p_vout->render.i_chroma )
 103     {
 104         case VLC_FOURCC('Y','V','1','2'):
 105         case VLC_FOURCC('I','4','2','0'):
 106         case VLC_FOURCC('I','Y','U','V'):
 107             switch( p_vout->output.i_chroma )
 108             {
 109 #if defined (MODULE_NAME_IS_i420_rgb)
 110                 case VLC_FOURCC('R','G','B','2'):
 111                     p_vout->chroma.pf_convert = E_(I420_RGB8);
 112                     break;
 113 #endif
 114                 case VLC_FOURCC('R','V','1','5'):
 115                 case VLC_FOURCC('R','V','1','6'):
 116 #if ! defined (MODULE_NAME_IS_i420_rgb)
 117                     /* If we don't have support for the bitmasks, bail out */
 118                     if( ( p_vout->output.i_rmask == 0x7c00
 119                        && p_vout->output.i_gmask == 0x03e0
 120                        && p_vout->output.i_bmask == 0x001f ) )
 121                     {
 122                         /* R5G5B6 pixel format */
 123                         msg_Dbg(p_this, "RGB pixel format is R5G5B5");
 124                         p_vout->chroma.pf_convert = E_(I420_R5G5B5);
 125                     }
 126                     else if( ( p_vout->output.i_rmask == 0xf800
 127                             && p_vout->output.i_gmask == 0x07e0
 128                             && p_vout->output.i_bmask == 0x001f ) )
 129                     {
 130                         /* R5G6B5 pixel format */
 131                         msg_Dbg(p_this, "RGB pixel format is R5G6B5");
 132                         p_vout->chroma.pf_convert = E_(I420_R5G6B5);
 133                     }
 134                     else
 135                         return -1;
 136 #else
 137                     // generic C chroma converter */
 138                     p_vout->chroma.pf_convert = E_(I420_RGB16);
 139 #endif
 140                     break;
 141
 142 #if 0
 143                 /* Hmmm, is there only X11 using 32bits per pixel for RV24 ? */
 144                 case VLC_FOURCC('R','V','2','4'):
 145 #endif
 146
 147                 case VLC_FOURCC('R','V','3','2'):
 148 #if ! defined (MODULE_NAME_IS_i420_rgb)
 149                     /* If we don't have support for the bitmasks, bail out */
 150                     if( p_vout->output.i_rmask == 0x00ff0000
 151                      && p_vout->output.i_gmask == 0x0000ff00
 152                      && p_vout->output.i_bmask == 0x000000ff )
 153                     {
 154                         /* A8R8G8B8 pixel format */
 155                         msg_Dbg(p_this, "RGB pixel format is A8R8G8B8");
 156                         p_vout->chroma.pf_convert = E_(I420_A8R8G8B8);
 157                     }
 158                     else if( p_vout->output.i_rmask == 0x0000ff00
 159                           && p_vout->output.i_gmask == 0x00ff0000
 160                           && p_vout->output.i_bmask == 0xff000000 )
 161                     {
 162                         /* B8G8R8A8 pixel format */
 163                         msg_Dbg(p_this, "RGB pixel format is B8G8R8A8");
 164                         p_vout->chroma.pf_convert = E_(I420_B8G8R8A8);
 165                     }
 166                     else
 167                         return -1;
 168 #else
 169                     // generic C chroma converter */
 170                     p_vout->chroma.pf_convert = E_(I420_RGB32);
 171 #endif
 172                     break;
 173
 174                 default:
 175                     return -1;
 176             }
 177             break;
 178
 179         default:
 180             return -1;
 181     }
 182
 183     p_vout->chroma.p_sys = malloc( sizeof( chroma_sys_t ) );
 184     if( p_vout->chroma.p_sys == NULL )
 185     {
 186         return -1;
 187     }
 188
 189     switch( p_vout->output.i_chroma )
 190     {
 191 #if defined (MODULE_NAME_IS_i420_rgb)
 192         case VLC_FOURCC('R','G','B','2'):
 193             p_vout->chroma.p_sys->p_buffer = malloc( VOUT_MAX_WIDTH );
 194             break;
 195 #endif
 196
 197         case VLC_FOURCC('R','V','1','5'):
 198         case VLC_FOURCC('R','V','1','6'):
 199             p_vout->chroma.p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 2 );
 200             break;
 201
 202         case VLC_FOURCC('R','V','2','4'):
 203         case VLC_FOURCC('R','V','3','2'):
 204             p_vout->chroma.p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 4 );
 205             break;
 206
 207         default:
 208             p_vout->chroma.p_sys->p_buffer = NULL;
 209             break;
 210     }
 211
 212     if( p_vout->chroma.p_sys->p_buffer == NULL )
 213     {
 214         free( p_vout->chroma.p_sys );
 215         return -1;
 216     }
 217
 218     p_vout->chroma.p_sys->p_offset = malloc( p_vout->output.i_width
 219                     * ( ( p_vout->output.i_chroma
 220                            == VLC_FOURCC('R','G','B','2') ) ? 2 : 1 )
 221                     * sizeof( int ) );
 222     if( p_vout->chroma.p_sys->p_offset == NULL )
 223     {
 224         free( p_vout->chroma.p_sys->p_buffer );
 225         free( p_vout->chroma.p_sys );
 226         return -1;
 227     }
 228
 229 #if defined (MODULE_NAME_IS_i420_rgb)
 230     switch( p_vout->output.i_chroma )
 231     {
 232     case VLC_FOURCC('R','G','B','2'):
 233         i_tables_size = sizeof( uint8_t ) * PALETTE_TABLE_SIZE;
 234         break;
 235     case VLC_FOURCC('R','V','1','5'):
 236     case VLC_FOURCC('R','V','1','6'):
 237         i_tables_size = sizeof( uint16_t ) * RGB_TABLE_SIZE;
 238         break;
 239     default: /* RV24, RV32 */
 240         i_tables_size = sizeof( uint32_t ) * RGB_TABLE_SIZE;
 241         break;
 242     }
 243
 244     p_vout->chroma.p_sys->p_base = malloc( i_tables_size );
 245     if( p_vout->chroma.p_sys->p_base == NULL )
 246     {
 247         free( p_vout->chroma.p_sys->p_offset );
 248         free( p_vout->chroma.p_sys->p_buffer );
 249         free( p_vout->chroma.p_sys );
 250         return -1;
 251     }
 252
 253     SetYUV( p_vout );
 254 #endif
 255
 256     return 0;
 257 }
 258
 259 /*****************************************************************************
 260  * Deactivate: free the chroma function
 261  *****************************************************************************
 262  * This function frees the previously allocated chroma function
 263  *****************************************************************************/
 264 static void Deactivate( vlc_object_t *p_this )
 265 {
 266     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 267
 268 #if defined (MODULE_NAME_IS_i420_rgb)
 269     free( p_vout->chroma.p_sys->p_base );
 270 #endif
 271     free( p_vout->chroma.p_sys->p_offset );
 272     free( p_vout->chroma.p_sys->p_buffer );
 273     free( p_vout->chroma.p_sys );
 274 }
 275
 276 #if defined (MODULE_NAME_IS_i420_rgb)
 277 /*****************************************************************************
 278  * SetGammaTable: return intensity table transformed by gamma curve.
 279  *****************************************************************************
 280  * pi_table is a table of 256 entries from 0 to 255.
 281  *****************************************************************************/
 282 static void SetGammaTable( int *pi_table, double f_gamma )
 283 {
 284     int i_y;                                               /* base intensity */
 285
 286     /* Use exp(gamma) instead of gamma */
 287     f_gamma = exp( f_gamma );
 288
 289     /* Build gamma table */
 290     for( i_y = 0; i_y < 256; i_y++ )
 291     {
 292         pi_table[ i_y ] = (int)( pow( (double)i_y / 256, f_gamma ) * 256 );
 293     }
 294 }
 295
 296 /*****************************************************************************
 297  * SetYUV: compute tables and set function pointers
 298  *****************************************************************************/
 299 static void SetYUV( vout_thread_t *p_vout )
 300 {
 301     int          pi_gamma[256];                               /* gamma table */
 302     volatile int i_index;                                 /* index in tables */
 303                    /* We use volatile here to work around a strange gcc-3.3.4
 304                     * optimization bug */
 305
 306     /* Build gamma table */
 307     SetGammaTable( pi_gamma, p_vout->f_gamma );
 308
 309     /*
 310      * Set pointers and build YUV tables
 311      */
 312
 313     /* Color: build red, green and blue tables */
 314     switch( p_vout->output.i_chroma )
 315     {
 316     case VLC_FOURCC('R','G','B','2'):
 317         p_vout->chroma.p_sys->p_rgb8 = (uint8_t *)p_vout->chroma.p_sys->p_base;
 318         Set8bppPalette( p_vout, p_vout->chroma.p_sys->p_rgb8 );
 319         break;
 320
 321     case VLC_FOURCC('R','V','1','5'):
 322     case VLC_FOURCC('R','V','1','6'):
 323         p_vout->chroma.p_sys->p_rgb16 = (uint16_t *)p_vout->chroma.p_sys->p_base;
 324         for( i_index = 0; i_index < RED_MARGIN; i_index++ )
 325         {
 326             p_vout->chroma.p_sys->p_rgb16[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_vout, pi_gamma[0], 0, 0 );
 327             p_vout->chroma.p_sys->p_rgb16[RED_OFFSET + 256 + i_index] =        RGB2PIXEL( p_vout, pi_gamma[255], 0, 0 );
 328         }
 329         for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
 330         {
 331             p_vout->chroma.p_sys->p_rgb16[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[0], 0 );
 332             p_vout->chroma.p_sys->p_rgb16[GREEN_OFFSET + 256 + i_index] =          RGB2PIXEL( p_vout, 0, pi_gamma[255], 0 );
 333         }
 334         for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
 335         {
 336             p_vout->chroma.p_sys->p_rgb16[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[0] );
 337             p_vout->chroma.p_sys->p_rgb16[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[255] );
 338         }
 339         for( i_index = 0; i_index < 256; i_index++ )
 340         {
 341             p_vout->chroma.p_sys->p_rgb16[RED_OFFSET + i_index] =   RGB2PIXEL( p_vout, pi_gamma[ i_index ], 0, 0 );
 342             p_vout->chroma.p_sys->p_rgb16[GREEN_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[ i_index ], 0 );
 343             p_vout->chroma.p_sys->p_rgb16[BLUE_OFFSET + i_index] =  RGB2PIXEL( p_vout, 0, 0, pi_gamma[ i_index ] );
 344         }
 345         break;
 346
 347     case VLC_FOURCC('R','V','2','4'):
 348     case VLC_FOURCC('R','V','3','2'):
 349         p_vout->chroma.p_sys->p_rgb32 = (uint32_t *)p_vout->chroma.p_sys->p_base;
 350         for( i_index = 0; i_index < RED_MARGIN; i_index++ )
 351         {
 352             p_vout->chroma.p_sys->p_rgb32[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_vout, pi_gamma[0], 0, 0 );
 353             p_vout->chroma.p_sys->p_rgb32[RED_OFFSET + 256 + i_index] =        RGB2PIXEL( p_vout, pi_gamma[255], 0, 0 );
 354         }
 355         for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
 356         {
 357             p_vout->chroma.p_sys->p_rgb32[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[0], 0 );
 358             p_vout->chroma.p_sys->p_rgb32[GREEN_OFFSET + 256 + i_index] =          RGB2PIXEL( p_vout, 0, pi_gamma[255], 0 );
 359         }
 360         for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
 361         {
 362             p_vout->chroma.p_sys->p_rgb32[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[0] );
 363             p_vout->chroma.p_sys->p_rgb32[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[255] );
 364         }
 365         for( i_index = 0; i_index < 256; i_index++ )
 366         {
 367             p_vout->chroma.p_sys->p_rgb32[RED_OFFSET + i_index] =   RGB2PIXEL( p_vout, pi_gamma[ i_index ], 0, 0 );
 368             p_vout->chroma.p_sys->p_rgb32[GREEN_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[ i_index ], 0 );
 369             p_vout->chroma.p_sys->p_rgb32[BLUE_OFFSET + i_index] =  RGB2PIXEL( p_vout, 0, 0, pi_gamma[ i_index ] );
 370         }
 371         break;
 372     }
 373 }
 374
 375 static void Set8bppPalette( vout_thread_t *p_vout, uint8_t *p_rgb8 )
 376 {
 377     #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
 378
 379     int y,u,v;
 380     int r,g,b;
 381     int i = 0, j = 0;
 382     uint16_t *p_cmap_r=p_vout->chroma.p_sys->p_rgb_r;
 383     uint16_t *p_cmap_g=p_vout->chroma.p_sys->p_rgb_g;
 384     uint16_t *p_cmap_b=p_vout->chroma.p_sys->p_rgb_b;
 385
 386     unsigned char p_lookup[PALETTE_TABLE_SIZE];
 387
 388     /* This loop calculates the intersection of an YUV box and the RGB cube. */
 389     for ( y = 0; y <= 256; y += 16, i += 128 - 81 )
 390     {
 391         for ( u = 0; u <= 256; u += 32 )
 392         {
 393             for ( v = 0; v <= 256; v += 32 )
 394             {
 395                 r = y + ( (V_RED_COEF*(v-128)) >> SHIFT );
 396                 g = y + ( (U_GREEN_COEF*(u-128)
 397                          + V_GREEN_COEF*(v-128)) >> SHIFT );
 398                 b = y + ( (U_BLUE_COEF*(u-128)) >> SHIFT );
 399
 400                 if( r >= 0x00 && g >= 0x00 && b >= 0x00
 401                         && r <= 0xff && g <= 0xff && b <= 0xff )
 402                 {
 403                     /* This one should never happen unless someone
 404                      * fscked up my code */
 405                     if( j == 256 )
 406                     {
 407                         msg_Err( p_vout, "no colors left in palette" );
 408                         break;
 409                     }
 410
 411                     /* Clip the colors */
 412                     p_cmap_r[ j ] = CLIP( r );
 413                     p_cmap_g[ j ] = CLIP( g );
 414                     p_cmap_b[ j ] = CLIP( b );
 415
 416 #if 0
 417                     printf("+++Alloc RGB cmap %d (%d, %d, %d)\n", j,
 418                            p_cmap_r[ j ] >>8, p_cmap_g[ j ] >>8,
 419                            p_cmap_b[ j ] >>8);
 420 #endif
 421
 422                     /* Allocate color */
 423                     p_lookup[ i ] = 1;
 424                     p_rgb8[ i++ ] = j;
 425                     j++;
 426                 }
 427                 else
 428                 {
 429                     p_lookup[ i ] = 0;
 430                     p_rgb8[ i++ ] = 0;
 431                 }
 432             }
 433         }
 434     }
 435
 436     /* The colors have been allocated, we can set the palette */
 437     p_vout->output.pf_setpalette( p_vout, p_cmap_r, p_cmap_g, p_cmap_b );
 438
 439 #if 0
 440     /* There will eventually be a way to know which colors
 441      * couldn't be allocated and try to find a replacement */
 442     p_vout->i_white_pixel = 0xff;
 443     p_vout->i_black_pixel = 0x00;
 444     p_vout->i_gray_pixel = 0x44;
 445     p_vout->i_blue_pixel = 0x3b;
 446 #endif
 447
 448     /* This loop allocates colors that got outside the RGB cube */
 449     for ( i = 0, y = 0; y <= 256; y += 16, i += 128 - 81 )
 450     {
 451         for ( u = 0; u <= 256; u += 32 )
 452         {
 453             for ( v = 0; v <= 256; v += 32, i++ )
 454             {
 455                 int u2, v2, dist, mindist = 100000000;
 456
 457                 if( p_lookup[ i ] || y == 0 )
 458                 {
 459                     continue;
 460                 }
 461
 462                 /* Heavy. yeah. */
 463                 for( u2 = 0; u2 <= 256; u2 += 32 )
 464                 {
 465                     for( v2 = 0; v2 <= 256; v2 += 32 )
 466                     {
 467                         j = ((y>>4)<<7) + (u2>>5)*9 + (v2>>5);
 468                         dist = (u-u2)*(u-u2) + (v-v2)*(v-v2);
 469
 470                         /* Find the nearest color */
 471                         if( p_lookup[ j ] && dist < mindist )
 472                         {
 473                             p_rgb8[ i ] = p_rgb8[ j ];
 474                             mindist = dist;
 475                         }
 476
 477                         j -= 128;
 478
 479                         /* Find the nearest color */
 480                         if( p_lookup[ j ] && dist + 128 < mindist )
 481                         {
 482                             p_rgb8[ i ] = p_rgb8[ j ];
 483                             mindist = dist + 128;
 484                         }
 485                     }
 486                 }
 487             }
 488         }
 489     }
 490 }
 491
 492 #endif
 493