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, 2008 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
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <math.h>                                            /* exp(), pow() */
  34
  35 #include <vlc_common.h>
  36 #include <vlc_plugin.h>
  37 #include <vlc_filter.h>
  38
  39 #include "i420_rgb.h"
  40 #if defined (MODULE_NAME_IS_i420_rgb)
  41 #   include "i420_rgb_c.h"
  42 #endif
  43
  44 /*****************************************************************************
  45  * RGB2PIXEL: assemble RGB components to a pixel value, returns a uint32_t
  46  *****************************************************************************/
  47 #define RGB2PIXEL( p_filter, i_r, i_g, i_b )                 \
  48     (((((uint32_t)i_r) >> p_filter->fmt_out.video.i_rrshift) \
  49                        << p_filter->fmt_out.video.i_lrshift) \
  50    | ((((uint32_t)i_g) >> p_filter->fmt_out.video.i_rgshift) \
  51                        << p_filter->fmt_out.video.i_lgshift) \
  52    | ((((uint32_t)i_b) >> p_filter->fmt_out.video.i_rbshift) \
  53                        << p_filter->fmt_out.video.i_lbshift))
  54
  55 /*****************************************************************************
  56  * Local and extern prototypes.
  57  *****************************************************************************/
  58 static int  Activate   ( vlc_object_t * );
  59 static void Deactivate ( vlc_object_t * );
  60
  61 #if defined (MODULE_NAME_IS_i420_rgb)
  62 static void SetGammaTable       ( int *pi_table, double f_gamma );
  63 static void SetYUV              ( filter_t * );
  64 static void Set8bppPalette      ( filter_t *, uint8_t * );
  65 #endif
  66
  67 /*****************************************************************************
  68  * Module descriptor.
  69  *****************************************************************************/
  70 vlc_module_begin ()
  71 #if defined (MODULE_NAME_IS_i420_rgb)
  72     set_description( N_("I420,IYUV,YV12 to "
  73                        "RGB2,RV15,RV16,RV24,RV32 conversions") )
  74     set_capability( "video filter2", 80 )
  75 #elif defined (MODULE_NAME_IS_i420_rgb_mmx)
  76     set_description( N_( "MMX I420,IYUV,YV12 to "
  77                         "RV15,RV16,RV24,RV32 conversions") )
  78     set_capability( "video filter2", 100 )
  79     add_requirement( MMX )
  80 #elif defined (MODULE_NAME_IS_i420_rgb_sse2)
  81     set_description( N_( "SSE2 I420,IYUV,YV12 to "
  82                         "RV15,RV16,RV24,RV32 conversions") )
  83     set_capability( "video filter2", 120 )
  84     add_requirement( SSE2 )
  85 #endif
  86     set_callbacks( Activate, Deactivate )
  87 vlc_module_end ()
  88
  89 /*****************************************************************************
  90  * Activate: allocate a chroma function
  91  *****************************************************************************
  92  * This function allocates and initializes a chroma function
  93  *****************************************************************************/
  94 static int Activate( vlc_object_t *p_this )
  95 {
  96     filter_t *p_filter = (filter_t *)p_this;
  97 #if defined (MODULE_NAME_IS_i420_rgb)
  98     size_t i_tables_size;
  99 #endif
 100
 101     if( p_filter->fmt_out.video.i_width & 1
 102      || p_filter->fmt_out.video.i_height & 1 )
 103     {
 104         return VLC_EGENERIC;
 105     }
 106
 107     switch( p_filter->fmt_in.video.i_chroma )
 108     {
 109         case VLC_CODEC_YV12:
 110         case VLC_CODEC_I420:
 111             switch( p_filter->fmt_out.video.i_chroma )
 112             {
 113 #if defined (MODULE_NAME_IS_i420_rgb)
 114                 case VLC_CODEC_RGB8:
 115                     p_filter->pf_video_filter = I420_RGB8_Filter;
 116                     break;
 117 #endif
 118                 case VLC_CODEC_RGB15:
 119                 case VLC_CODEC_RGB16:
 120 #if ! defined (MODULE_NAME_IS_i420_rgb)
 121                     /* If we don't have support for the bitmasks, bail out */
 122                     if( ( p_filter->fmt_out.video.i_rmask == 0x7c00
 123                        && p_filter->fmt_out.video.i_gmask == 0x03e0
 124                        && p_filter->fmt_out.video.i_bmask == 0x001f ) )
 125                     {
 126                         /* R5G5B6 pixel format */
 127                         msg_Dbg(p_this, "RGB pixel format is R5G5B5");
 128                         p_filter->pf_video_filter = I420_R5G5B5_Filter;
 129                     }
 130                     else if( ( p_filter->fmt_out.video.i_rmask == 0xf800
 131                             && p_filter->fmt_out.video.i_gmask == 0x07e0
 132                             && p_filter->fmt_out.video.i_bmask == 0x001f ) )
 133                     {
 134                         /* R5G6B5 pixel format */
 135                         msg_Dbg(p_this, "RGB pixel format is R5G6B5");
 136                         p_filter->pf_video_filter = I420_R5G6B5_Filter;
 137                     }
 138                     else
 139                         return VLC_EGENERIC;
 140 #else
 141                     // generic C chroma converter */
 142                     p_filter->pf_video_filter = I420_RGB16_Filter;
 143 #endif
 144                     break;
 145
 146 #if 0
 147                 /* Hmmm, is there only X11 using 32bits per pixel for RV24 ? */
 148                 case VLC_CODEC_RGB24:
 149 #endif
 150
 151                 case VLC_CODEC_RGB32:
 152 #if ! defined (MODULE_NAME_IS_i420_rgb)
 153                     /* If we don't have support for the bitmasks, bail out */
 154                     if( p_filter->fmt_out.video.i_rmask == 0x00ff0000
 155                      && p_filter->fmt_out.video.i_gmask == 0x0000ff00
 156                      && p_filter->fmt_out.video.i_bmask == 0x000000ff )
 157                     {
 158                         /* A8R8G8B8 pixel format */
 159                         msg_Dbg(p_this, "RGB pixel format is A8R8G8B8");
 160                         p_filter->pf_video_filter = I420_A8R8G8B8_Filter;
 161                     }
 162                     else if( p_filter->fmt_out.video.i_rmask == 0xff000000
 163                           && p_filter->fmt_out.video.i_gmask == 0x00ff0000
 164                           && p_filter->fmt_out.video.i_bmask == 0x0000ff00 )
 165                     {
 166                         /* R8G8B8A8 pixel format */
 167                         msg_Dbg(p_this, "RGB pixel format is R8G8B8A8");
 168                         p_filter->pf_video_filter = I420_R8G8B8A8_Filter;
 169                     }
 170                     else if( p_filter->fmt_out.video.i_rmask == 0x0000ff00
 171                           && p_filter->fmt_out.video.i_gmask == 0x00ff0000
 172                           && p_filter->fmt_out.video.i_bmask == 0xff000000 )
 173                     {
 174                         /* B8G8R8A8 pixel format */
 175                         msg_Dbg(p_this, "RGB pixel format is B8G8R8A8");
 176                         p_filter->pf_video_filter = I420_B8G8R8A8_Filter;
 177                     }
 178                     else if( p_filter->fmt_out.video.i_rmask == 0x000000ff
 179                           && p_filter->fmt_out.video.i_gmask == 0x0000ff00
 180                           && p_filter->fmt_out.video.i_bmask == 0x00ff0000 )
 181                     {
 182                         /* A8B8G8R8 pixel format */
 183                         msg_Dbg(p_this, "RGB pixel format is A8B8G8R8");
 184                         p_filter->pf_video_filter = I420_A8B8G8R8_Filter;
 185                     }
 186                     else
 187                         return VLC_EGENERIC;
 188 #else
 189                     /* generic C chroma converter */
 190                     p_filter->pf_video_filter = I420_RGB32_Filter;
 191 #endif
 192                     break;
 193
 194                 default:
 195                     return VLC_EGENERIC;
 196             }
 197             break;
 198
 199         default:
 200             return VLC_EGENERIC;
 201     }
 202
 203     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
 204     if( p_filter->p_sys == NULL )
 205     {
 206         return VLC_EGENERIC;
 207     }
 208
 209     switch( p_filter->fmt_out.video.i_chroma )
 210     {
 211 #if defined (MODULE_NAME_IS_i420_rgb)
 212         case VLC_CODEC_RGB8:
 213             p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH );
 214             break;
 215 #endif
 216
 217         case VLC_CODEC_RGB15:
 218         case VLC_CODEC_RGB16:
 219             p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 2 );
 220             break;
 221
 222         case VLC_CODEC_RGB24:
 223         case VLC_CODEC_RGB32:
 224             p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 4 );
 225             break;
 226
 227         default:
 228             p_filter->p_sys->p_buffer = NULL;
 229             break;
 230     }
 231
 232     if( p_filter->p_sys->p_buffer == NULL )
 233     {
 234         free( p_filter->p_sys );
 235         return VLC_EGENERIC;
 236     }
 237
 238     p_filter->p_sys->p_offset = malloc( p_filter->fmt_out.video.i_width
 239                     * ( ( p_filter->fmt_out.video.i_chroma
 240                            == VLC_CODEC_RGB8 ) ? 2 : 1 )
 241                     * sizeof( int ) );
 242     if( p_filter->p_sys->p_offset == NULL )
 243     {
 244         free( p_filter->p_sys->p_buffer );
 245         free( p_filter->p_sys );
 246         return VLC_EGENERIC;
 247     }
 248
 249 #if defined (MODULE_NAME_IS_i420_rgb)
 250     switch( p_filter->fmt_out.video.i_chroma )
 251     {
 252     case VLC_CODEC_RGB8:
 253         i_tables_size = sizeof( uint8_t ) * PALETTE_TABLE_SIZE;
 254         break;
 255     case VLC_CODEC_RGB15:
 256     case VLC_CODEC_RGB16:
 257         i_tables_size = sizeof( uint16_t ) * RGB_TABLE_SIZE;
 258         break;
 259     default: /* RV24, RV32 */
 260         i_tables_size = sizeof( uint32_t ) * RGB_TABLE_SIZE;
 261         break;
 262     }
 263
 264     p_filter->p_sys->p_base = malloc( i_tables_size );
 265     if( p_filter->p_sys->p_base == NULL )
 266     {
 267         free( p_filter->p_sys->p_offset );
 268         free( p_filter->p_sys->p_buffer );
 269         free( p_filter->p_sys );
 270         return -1;
 271     }
 272
 273     SetYUV( p_filter );
 274 #endif
 275
 276     return 0;
 277 }
 278
 279 /*****************************************************************************
 280  * Deactivate: free the chroma function
 281  *****************************************************************************
 282  * This function frees the previously allocated chroma function
 283  *****************************************************************************/
 284 static void Deactivate( vlc_object_t *p_this )
 285 {
 286     filter_t *p_filter = (filter_t *)p_this;
 287
 288 #if defined (MODULE_NAME_IS_i420_rgb)
 289     free( p_filter->p_sys->p_base );
 290 #endif
 291     free( p_filter->p_sys->p_offset );
 292     free( p_filter->p_sys->p_buffer );
 293     free( p_filter->p_sys );
 294 }
 295
 296 #if defined (MODULE_NAME_IS_i420_rgb)
 297 VIDEO_FILTER_WRAPPER( I420_RGB8 )
 298 VIDEO_FILTER_WRAPPER( I420_RGB16 )
 299 VIDEO_FILTER_WRAPPER( I420_RGB32 )
 300 #else
 301 VIDEO_FILTER_WRAPPER( I420_R5G5B5 )
 302 VIDEO_FILTER_WRAPPER( I420_R5G6B5 )
 303 VIDEO_FILTER_WRAPPER( I420_A8R8G8B8 )
 304 VIDEO_FILTER_WRAPPER( I420_R8G8B8A8 )
 305 VIDEO_FILTER_WRAPPER( I420_B8G8R8A8 )
 306 VIDEO_FILTER_WRAPPER( I420_A8B8G8R8 )
 307 #endif
 308
 309 #if defined (MODULE_NAME_IS_i420_rgb)
 310 /*****************************************************************************
 311  * SetGammaTable: return intensity table transformed by gamma curve.
 312  *****************************************************************************
 313  * pi_table is a table of 256 entries from 0 to 255.
 314  *****************************************************************************/
 315 static void SetGammaTable( int *pi_table, double f_gamma )
 316 {
 317     int i_y;                                               /* base intensity */
 318
 319     /* Use exp(gamma) instead of gamma */
 320     f_gamma = exp( f_gamma );
 321
 322     /* Build gamma table */
 323     for( i_y = 0; i_y < 256; i_y++ )
 324     {
 325         pi_table[ i_y ] = (int)( pow( (double)i_y / 256, f_gamma ) * 256 );
 326     }
 327 }
 328
 329 /*****************************************************************************
 330  * SetYUV: compute tables and set function pointers
 331  *****************************************************************************/
 332 static void SetYUV( filter_t *p_filter )
 333 {
 334     int          pi_gamma[256];                               /* gamma table */
 335     volatile int i_index;                                 /* index in tables */
 336                    /* We use volatile here to work around a strange gcc-3.3.4
 337                     * optimization bug */
 338
 339     /* Build gamma table */
 340     SetGammaTable( pi_gamma, 0 ); //p_filter/*FIXME wasn't used anywhere anyway*/->f_gamma );
 341
 342     /*
 343      * Set pointers and build YUV tables
 344      */
 345
 346     /* Color: build red, green and blue tables */
 347     switch( p_filter->fmt_out.video.i_chroma )
 348     {
 349     case VLC_CODEC_RGB8:
 350         p_filter->p_sys->p_rgb8 = (uint8_t *)p_filter->p_sys->p_base;
 351         Set8bppPalette( p_filter, p_filter->p_sys->p_rgb8 );
 352         break;
 353
 354     case VLC_CODEC_RGB15:
 355     case VLC_CODEC_RGB16:
 356         p_filter->p_sys->p_rgb16 = (uint16_t *)p_filter->p_sys->p_base;
 357         for( i_index = 0; i_index < RED_MARGIN; i_index++ )
 358         {
 359             p_filter->p_sys->p_rgb16[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_filter, pi_gamma[0], 0, 0 );
 360             p_filter->p_sys->p_rgb16[RED_OFFSET + 256 + i_index] =        RGB2PIXEL( p_filter, pi_gamma[255], 0, 0 );
 361         }
 362         for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
 363         {
 364             p_filter->p_sys->p_rgb16[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[0], 0 );
 365             p_filter->p_sys->p_rgb16[GREEN_OFFSET + 256 + i_index] =          RGB2PIXEL( p_filter, 0, pi_gamma[255], 0 );
 366         }
 367         for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
 368         {
 369             p_filter->p_sys->p_rgb16[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[0] );
 370             p_filter->p_sys->p_rgb16[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[255] );
 371         }
 372         for( i_index = 0; i_index < 256; i_index++ )
 373         {
 374             p_filter->p_sys->p_rgb16[RED_OFFSET + i_index] =   RGB2PIXEL( p_filter, pi_gamma[ i_index ], 0, 0 );
 375             p_filter->p_sys->p_rgb16[GREEN_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[ i_index ], 0 );
 376             p_filter->p_sys->p_rgb16[BLUE_OFFSET + i_index] =  RGB2PIXEL( p_filter, 0, 0, pi_gamma[ i_index ] );
 377         }
 378         break;
 379
 380     case VLC_CODEC_RGB24:
 381     case VLC_CODEC_RGB32:
 382         p_filter->p_sys->p_rgb32 = (uint32_t *)p_filter->p_sys->p_base;
 383         for( i_index = 0; i_index < RED_MARGIN; i_index++ )
 384         {
 385             p_filter->p_sys->p_rgb32[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_filter, pi_gamma[0], 0, 0 );
 386             p_filter->p_sys->p_rgb32[RED_OFFSET + 256 + i_index] =        RGB2PIXEL( p_filter, pi_gamma[255], 0, 0 );
 387         }
 388         for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
 389         {
 390             p_filter->p_sys->p_rgb32[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[0], 0 );
 391             p_filter->p_sys->p_rgb32[GREEN_OFFSET + 256 + i_index] =          RGB2PIXEL( p_filter, 0, pi_gamma[255], 0 );
 392         }
 393         for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
 394         {
 395             p_filter->p_sys->p_rgb32[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[0] );
 396             p_filter->p_sys->p_rgb32[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[255] );
 397         }
 398         for( i_index = 0; i_index < 256; i_index++ )
 399         {
 400             p_filter->p_sys->p_rgb32[RED_OFFSET + i_index] =   RGB2PIXEL( p_filter, pi_gamma[ i_index ], 0, 0 );
 401             p_filter->p_sys->p_rgb32[GREEN_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[ i_index ], 0 );
 402             p_filter->p_sys->p_rgb32[BLUE_OFFSET + i_index] =  RGB2PIXEL( p_filter, 0, 0, pi_gamma[ i_index ] );
 403         }
 404         break;
 405     }
 406 }
 407
 408 static void Set8bppPalette( filter_t *p_filter, uint8_t *p_rgb8 )
 409 {
 410     #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
 411
 412     int y,u,v;
 413     int r,g,b;
 414     int i = 0, j = 0;
 415     uint16_t *p_cmap_r = p_filter->p_sys->p_rgb_r;
 416     uint16_t *p_cmap_g = p_filter->p_sys->p_rgb_g;
 417     uint16_t *p_cmap_b = p_filter->p_sys->p_rgb_b;
 418
 419     unsigned char p_lookup[PALETTE_TABLE_SIZE];
 420
 421     /* This loop calculates the intersection of an YUV box and the RGB cube. */
 422     for ( y = 0; y <= 256; y += 16, i += 128 - 81 )
 423     {
 424         for ( u = 0; u <= 256; u += 32 )
 425         {
 426             for ( v = 0; v <= 256; v += 32 )
 427             {
 428                 r = y + ( (V_RED_COEF*(v-128)) >> SHIFT );
 429                 g = y + ( (U_GREEN_COEF*(u-128)
 430                          + V_GREEN_COEF*(v-128)) >> SHIFT );
 431                 b = y + ( (U_BLUE_COEF*(u-128)) >> SHIFT );
 432
 433                 if( r >= 0x00 && g >= 0x00 && b >= 0x00
 434                         && r <= 0xff && g <= 0xff && b <= 0xff )
 435                 {
 436                     /* This one should never happen unless someone
 437                      * fscked up my code */
 438                     if( j == 256 )
 439                     {
 440                         msg_Err( p_filter, "no colors left in palette" );
 441                         break;
 442                     }
 443
 444                     /* Clip the colors */
 445                     p_cmap_r[ j ] = CLIP( r );
 446                     p_cmap_g[ j ] = CLIP( g );
 447                     p_cmap_b[ j ] = CLIP( b );
 448
 449 #if 0
 450             printf("+++Alloc RGB cmap %d (%d, %d, %d)\n", j,
 451                p_cmap_r[ j ] >>8, p_cmap_g[ j ] >>8,
 452                p_cmap_b[ j ] >>8);
 453 #endif
 454
 455                     /* Allocate color */
 456                     p_lookup[ i ] = 1;
 457                     p_rgb8[ i++ ] = j;
 458                     j++;
 459                 }
 460                 else
 461                 {
 462                     p_lookup[ i ] = 0;
 463                     p_rgb8[ i++ ] = 0;
 464                 }
 465             }
 466         }
 467     }
 468
 469     /* The colors have been allocated, we can set the palette */
 470     /* FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
 471     p_filter->fmt_out.video.pf_setpalette( p_filter, p_cmap_r, p_cmap_g, p_cmap_b );*/
 472
 473 #if 0
 474     /* There will eventually be a way to know which colors
 475      * couldn't be allocated and try to find a replacement */
 476     p_vout->i_white_pixel = 0xff;
 477     p_vout->i_black_pixel = 0x00;
 478     p_vout->i_gray_pixel = 0x44;
 479     p_vout->i_blue_pixel = 0x3b;
 480 #endif
 481
 482     /* This loop allocates colors that got outside the RGB cube */
 483     for ( i = 0, y = 0; y <= 256; y += 16, i += 128 - 81 )
 484     {
 485         for ( u = 0; u <= 256; u += 32 )
 486         {
 487             for ( v = 0; v <= 256; v += 32, i++ )
 488             {
 489                 int u2, v2, dist, mindist = 100000000;
 490
 491                 if( p_lookup[ i ] || y == 0 )
 492                 {
 493                     continue;
 494                 }
 495
 496                 /* Heavy. yeah. */
 497                 for( u2 = 0; u2 <= 256; u2 += 32 )
 498                 {
 499                     for( v2 = 0; v2 <= 256; v2 += 32 )
 500                     {
 501                         j = ((y>>4)<<7) + (u2>>5)*9 + (v2>>5);
 502                         dist = (u-u2)*(u-u2) + (v-v2)*(v-v2);
 503
 504                         /* Find the nearest color */
 505                         if( p_lookup[ j ] && dist < mindist )
 506                         {
 507                             p_rgb8[ i ] = p_rgb8[ j ];
 508                             mindist = dist;
 509                         }
 510
 511                         j -= 128;
 512
 513                         /* Find the nearest color */
 514                         if( p_lookup[ j ] && dist + 128 < mindist )
 515                         {
 516                             p_rgb8[ i ] = p_rgb8[ j ];
 517                             mindist = dist + 128;
 518                         }
 519                     }
 520                 }
 521             }
 522         }
 523     }
 524 }
 525
 526 #endif
 527