git.sesse.net Git - vlc/blob - modules/video_filter/blend.c

   1 /*****************************************************************************
   2  * blend.c: alpha blend 2 pictures together
   3  *****************************************************************************
   4  * Copyright (C) 2003-2008 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *          Antoine Cellerier <dionoea @t videolan dot 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 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <assert.h>
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_vout.h>
  36 #include "vlc_filter.h"
  37
  38 /*****************************************************************************
  39  * Module descriptor
  40  *****************************************************************************/
  41 static int  OpenFilter ( vlc_object_t * );
  42 static void CloseFilter( vlc_object_t * );
  43
  44 vlc_module_begin ()
  45     set_description( N_("Video pictures blending") )
  46     set_capability( "video blending", 100 )
  47     set_callbacks( OpenFilter, CloseFilter )
  48 vlc_module_end ()
  49
  50
  51 /*****************************************************************************
  52  * filter_sys_t : filter descriptor
  53  *****************************************************************************/
  54 struct filter_sys_t
  55 {
  56     int i_dummy;
  57 };
  58
  59 #define FCC_YUVA VLC_FOURCC('Y','U','V','A')
  60 #define FCC_YUVP VLC_FOURCC('Y','U','V','P')
  61 #define FCC_RGBA VLC_FOURCC('R','G','B','A')
  62
  63 #define FCC_I420 VLC_FOURCC('I','4','2','0')
  64 #define FCC_YV12 VLC_FOURCC('Y','V','1','2')
  65 #define FCC_YUY2 VLC_FOURCC('Y','U','Y','2')
  66 #define FCC_UYVY VLC_FOURCC('U','Y','V','Y')
  67 #define FCC_YVYU VLC_FOURCC('Y','V','Y','U')
  68 #define FCC_RV15 VLC_FOURCC('R','V','1','5')
  69 #define FCC_RV16 VLC_FOURCC('R','V','1','6')
  70 #define FCC_RV24 VLC_FOURCC('R','V','2','4')
  71 #define FCC_RV32 VLC_FOURCC('R','V','3','2')
  72
  73 /****************************************************************************
  74  * Local prototypes
  75  ****************************************************************************/
  76 static void Blend( filter_t *, picture_t *, picture_t *,
  77                    int, int, int );
  78
  79 /* YUVA */
  80 static void BlendYUVAI420( filter_t *, picture_t *, picture_t *,
  81                            int, int, int, int, int );
  82 static void BlendYUVARV16( filter_t *, picture_t *, picture_t *,
  83                            int, int, int, int, int );
  84 static void BlendYUVARV24( filter_t *, picture_t *, picture_t *,
  85                            int, int, int, int, int );
  86 static void BlendYUVAYUVPacked( filter_t *, picture_t *, picture_t *,
  87                                 int, int, int, int, int );
  88
  89 /* I420, YV12 */
  90 static void BlendI420I420( filter_t *, picture_t *, picture_t *,
  91                            int, int, int, int, int );
  92 static void BlendI420I420_no_alpha(
  93                            filter_t *, picture_t *, picture_t *,
  94                            int, int, int, int );
  95 static void BlendI420R16( filter_t *, picture_t *, picture_t *,
  96                            int, int, int, int, int );
  97 static void BlendI420R24( filter_t *, picture_t *, picture_t *,
  98                           int, int, int, int, int );
  99 static void BlendI420YUVPacked( filter_t *, picture_t *,
 100                                 picture_t *, int, int, int, int, int );
 101
 102 /* YUVP */
 103 static void BlendPalI420( filter_t *, picture_t *, picture_t *,
 104                           int, int, int, int, int );
 105 static void BlendPalYUVPacked( filter_t *, picture_t *, picture_t *,
 106                                int, int, int, int, int );
 107 static void BlendPalRV( filter_t *, picture_t *, picture_t *,
 108                         int, int, int, int, int );
 109
 110 /* RGBA */
 111 static void BlendRGBAI420( filter_t *, picture_t *, picture_t *,
 112                            int, int, int, int, int );
 113 static void BlendRGBAYUVPacked( filter_t *, picture_t *,
 114                                 picture_t *, int, int, int, int, int );
 115 static void BlendRGBAR16( filter_t *, picture_t *, picture_t *,
 116                           int, int, int, int, int );
 117 static void BlendRGBAR24( filter_t *, picture_t *, picture_t *,
 118                           int, int, int, int, int );
 119
 120 /*****************************************************************************
 121  * OpenFilter: probe the filter and return score
 122  *****************************************************************************/
 123 static int OpenFilter( vlc_object_t *p_this )
 124 {
 125     filter_t *p_filter = (filter_t*)p_this;
 126     filter_sys_t *p_sys;
 127
 128     /* Check if we can handle that format.
 129      * We could try to use a chroma filter if we can't. */
 130     int in_chroma = p_filter->fmt_in.video.i_chroma;
 131     int out_chroma = p_filter->fmt_out.video.i_chroma;
 132     if( ( in_chroma  != FCC_YUVA && in_chroma  != FCC_I420 &&
 133           in_chroma  != FCC_YV12 && in_chroma  != FCC_YUVP &&
 134           in_chroma  != FCC_RGBA ) ||
 135         ( out_chroma != FCC_I420 && out_chroma != FCC_YUY2 &&
 136           out_chroma != FCC_YV12 && out_chroma != FCC_UYVY &&
 137           out_chroma != FCC_YVYU && out_chroma != FCC_RV15 &&
 138           out_chroma != FCC_YVYU && out_chroma != FCC_RV16 &&
 139           out_chroma != FCC_RV24 && out_chroma != FCC_RV32 ) )
 140     {
 141         return VLC_EGENERIC;
 142     }
 143
 144     /* Allocate the memory needed to store the decoder's structure */
 145     p_filter->p_sys = p_sys = malloc(sizeof(filter_sys_t));
 146     if( !p_sys )
 147         return VLC_ENOMEM;
 148
 149     /* Misc init */
 150     p_filter->pf_video_blend = Blend;
 151
 152     msg_Dbg( p_filter, "chroma: %4.4s -> %4.4s",
 153              (char *)&p_filter->fmt_in.video.i_chroma,
 154              (char *)&p_filter->fmt_out.video.i_chroma );
 155
 156     return VLC_SUCCESS;
 157 }
 158
 159 /*****************************************************************************
 160  * CloseFilter: clean up the filter
 161  *****************************************************************************/
 162 static void CloseFilter( vlc_object_t *p_this )
 163 {
 164     filter_t *p_filter = (filter_t*)p_this;
 165     filter_sys_t *p_sys = p_filter->p_sys;
 166
 167     free( p_sys );
 168 }
 169
 170 /****************************************************************************
 171  * Blend: the whole thing
 172  ****************************************************************************
 173  * This function is called just after the thread is launched.
 174  ****************************************************************************/
 175 typedef void (*BlendFunction)( filter_t *,
 176                        picture_t *, picture_t *,
 177                        int , int , int , int , int );
 178
 179 #define FCC_PLANAR_420 { FCC_I420, FCC_YV12, 0 }
 180 #define FCC_PACKED_422 { FCC_YUY2, FCC_UYVY, FCC_YVYU, 0 }
 181 #define FCC_RGB_16 { FCC_RV15, FCC_RV16, 0 }
 182 #define FCC_RGB_24 { FCC_RV24, FCC_RV32, 0 }
 183
 184 #define BLEND_CFG( fccSrc, fctPlanar, fctPacked, fctRgb16, fctRgb24  ) \
 185     { .src = fccSrc, .p_dst = FCC_PLANAR_420, .pf_blend = fctPlanar }, \
 186     { .src = fccSrc, .p_dst = FCC_PACKED_422, .pf_blend = fctPacked }, \
 187     { .src = fccSrc, .p_dst = FCC_RGB_16,     .pf_blend = fctRgb16  }, \
 188     { .src = fccSrc, .p_dst = FCC_RGB_24,     .pf_blend = fctRgb24  }
 189
 190 static const struct
 191 {
 192     vlc_fourcc_t src;
 193     vlc_fourcc_t p_dst[16];
 194     BlendFunction pf_blend;
 195 } p_blend_cfg[] = {
 196
 197     BLEND_CFG( FCC_YUVA, BlendYUVAI420, BlendYUVAYUVPacked, BlendYUVARV16, BlendYUVARV24 ),
 198
 199     BLEND_CFG( FCC_YUVP, BlendPalI420, BlendPalYUVPacked, BlendPalRV, BlendPalRV ),
 200
 201     BLEND_CFG( FCC_RGBA, BlendRGBAI420, BlendRGBAYUVPacked, BlendRGBAR16, BlendRGBAR24 ),
 202
 203     BLEND_CFG( FCC_I420, BlendI420I420, BlendI420YUVPacked, BlendI420R16, BlendI420R24 ),
 204
 205     BLEND_CFG( FCC_YV12, BlendI420I420, BlendI420YUVPacked, BlendI420R16, BlendI420R24 ),
 206
 207     { 0, {0,}, NULL }
 208 };
 209
 210 static void Blend( filter_t *p_filter,
 211                    picture_t *p_dst, picture_t *p_src,
 212                    int i_x_offset, int i_y_offset, int i_alpha )
 213 {
 214     int i_width, i_height;
 215
 216     if( i_alpha == 0 )
 217         return;
 218
 219     i_width = __MIN((int)p_filter->fmt_out.video.i_visible_width - i_x_offset,
 220                     (int)p_filter->fmt_in.video.i_visible_width);
 221
 222     i_height = __MIN((int)p_filter->fmt_out.video.i_visible_height -i_y_offset,
 223                      (int)p_filter->fmt_in.video.i_visible_height);
 224
 225     if( i_width <= 0 || i_height <= 0 )
 226         return;
 227
 228     video_format_FixRgb( &p_filter->fmt_out.video );
 229     video_format_FixRgb( &p_filter->fmt_in.video );
 230
 231 #if 0
 232     msg_Dbg( p_filter, "chroma: %4.4s -> %4.4s\n",
 233              (char *)&p_filter->fmt_in.video.i_chroma,
 234              (char *)&p_filter->fmt_out.video.i_chroma );
 235 #endif
 236
 237     for( int i = 0; p_blend_cfg[i].src != 0; i++ )
 238     {
 239         if( p_blend_cfg[i].src != p_filter->fmt_in.video.i_chroma )
 240             continue;
 241         for( int j = 0; p_blend_cfg[i].p_dst[j] != 0; j++ )
 242         {
 243             if( p_blend_cfg[i].p_dst[j] != p_filter->fmt_out.video.i_chroma )
 244                 continue;
 245
 246             p_blend_cfg[i].pf_blend( p_filter, p_dst, p_src,
 247                                      i_x_offset, i_y_offset,
 248                                      i_width, i_height, i_alpha );
 249             return;
 250         }
 251     }
 252
 253     msg_Dbg( p_filter, "no matching alpha blending routine "
 254              "(chroma: %4.4s -> %4.4s)",
 255              (char *)&p_filter->fmt_in.video.i_chroma,
 256              (char *)&p_filter->fmt_out.video.i_chroma );
 257 }
 258
 259 /***********************************************************************
 260  * Utils
 261  ***********************************************************************/
 262 static inline uint8_t vlc_uint8( int v )
 263 {
 264     if( v > 255 )
 265         return 255;
 266     else if( v < 0 )
 267         return 0;
 268     return v;
 269 }
 270
 271 #define MAX_TRANS 255
 272 #define TRANS_BITS  8
 273
 274 static inline int vlc_blend( int v1, int v2, int a )
 275 {
 276     /* TODO bench if the tests really increase speed */
 277     if( a == 0 )
 278         return v2;
 279     else if( a == MAX_TRANS )
 280         return v1;
 281     return ( v1 * a + v2 * (MAX_TRANS - a ) ) >> TRANS_BITS;
 282 }
 283
 284 static inline int vlc_alpha( int t, int a )
 285 {
 286     if( a == 255 )
 287         return t;
 288     return (t * a) / 255;
 289 }
 290
 291 static inline void yuv_to_rgb( int *r, int *g, int *b,
 292                                uint8_t y1, uint8_t u1, uint8_t v1 )
 293 {
 294     /* macros used for YUV pixel conversions */
 295 #   define SCALEBITS 10
 296 #   define ONE_HALF  (1 << (SCALEBITS - 1))
 297 #   define FIX(x)    ((int) ((x) * (1<<SCALEBITS) + 0.5))
 298
 299     int y, cb, cr, r_add, g_add, b_add;
 300
 301     cb = u1 - 128;
 302     cr = v1 - 128;
 303     r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;
 304     g_add = - FIX(0.34414*255.0/224.0) * cb
 305             - FIX(0.71414*255.0/224.0) * cr + ONE_HALF;
 306     b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;
 307     y = (y1 - 16) * FIX(255.0/219.0);
 308     *r = vlc_uint8( (y + r_add) >> SCALEBITS );
 309     *g = vlc_uint8( (y + g_add) >> SCALEBITS );
 310     *b = vlc_uint8( (y + b_add) >> SCALEBITS );
 311 #undef FIX
 312 #undef ONE_HALF
 313 #undef SCALEBITS
 314 }
 315
 316 static inline void rgb_to_yuv( uint8_t *y, uint8_t *u, uint8_t *v,
 317                                int r, int g, int b )
 318 {
 319     *y = ( ( (  66 * r + 129 * g +  25 * b + 128 ) >> 8 ) + 16 );
 320     *u =   ( ( -38 * r -  74 * g + 112 * b + 128 ) >> 8 ) + 128 ;
 321     *v =   ( ( 112 * r -  94 * g -  18 * b + 128 ) >> 8 ) + 128 ;
 322 }
 323
 324 static uint8_t *vlc_plane_start( int *pi_pitch,
 325                                  picture_t *p_picture,
 326                                  int i_plane,
 327                                  int i_x_offset, int i_y_offset,
 328                                  const video_format_t *p_fmt,
 329                                  int r )
 330 {
 331     const int i_pitch = p_picture->p[i_plane].i_pitch;
 332     uint8_t *p_pixels = p_picture->p[i_plane].p_pixels;
 333
 334     const int i_dx = ( i_x_offset + p_fmt->i_x_offset ) / r;
 335     const int i_dy = ( i_y_offset + p_fmt->i_y_offset ) / r;
 336
 337     if( pi_pitch )
 338         *pi_pitch = i_pitch;
 339     return &p_pixels[ i_dy * i_pitch + i_dx ];
 340 }
 341
 342 static void vlc_yuv_packed_index( int *pi_y, int *pi_u, int *pi_v, vlc_fourcc_t i_chroma )
 343 {
 344     static const struct {
 345         vlc_fourcc_t chroma;
 346         int y, u ,v;
 347     } p_index[] = {
 348         { FCC_YUY2, 0, 1, 3 },
 349         { FCC_UYVY, 1, 0, 2 },
 350         { FCC_YVYU, 0, 3, 1 },
 351         { 0, 0, 0, 0 }
 352     };
 353     int i;
 354
 355     for( i = 0; p_index[i].chroma != 0; i++ )
 356     {
 357         if( p_index[i].chroma == i_chroma )
 358             break;
 359     }
 360     *pi_y = p_index[i].y;
 361     *pi_u = p_index[i].u;
 362     *pi_v = p_index[i].v;
 363 }
 364
 365 static void vlc_blend_packed( uint8_t *p_dst,
 366                               int i_offset0, int i_offset1, int i_offset2,
 367                               int c0, int c1, int c2, int i_alpha,
 368                               bool b_do12 )
 369 {
 370     p_dst[i_offset0] = vlc_blend( c0, p_dst[i_offset0], i_alpha );
 371     if( b_do12 )
 372     {
 373         p_dst[i_offset1] = vlc_blend( c1, p_dst[i_offset1], i_alpha );
 374         p_dst[i_offset2] = vlc_blend( c2, p_dst[i_offset2], i_alpha );
 375     }
 376 }
 377
 378 static void vlc_blend_rgb16( uint16_t *p_dst,
 379                              int R, int G, int B, int i_alpha,
 380                              const video_format_t *p_fmt )
 381 {
 382     const int i_pix = *p_dst;
 383     const int r = ( i_pix & p_fmt->i_rmask ) >> p_fmt->i_lrshift;
 384     const int g = ( i_pix & p_fmt->i_gmask ) >> p_fmt->i_lgshift;
 385     const int b = ( i_pix & p_fmt->i_bmask ) >> p_fmt->i_lbshift;
 386
 387     *p_dst = ( vlc_blend( R >> p_fmt->i_rrshift, r, i_alpha ) << p_fmt->i_lrshift ) |
 388              ( vlc_blend( G >> p_fmt->i_rgshift, g, i_alpha ) << p_fmt->i_lgshift ) |
 389              ( vlc_blend( B >> p_fmt->i_rbshift, b, i_alpha ) << p_fmt->i_lbshift );
 390 }
 391
 392 static void vlc_rgb_index( int *pi_rindex, int *pi_gindex, int *pi_bindex,
 393                            const video_format_t *p_fmt )
 394 {
 395     if( p_fmt->i_chroma != FCC_RV24 && p_fmt->i_chroma != FCC_RV32 )
 396         return;
 397
 398     /* XXX it will works only if mask are 8 bits aligned */
 399 #ifdef WORDS_BIGENDIAN
 400     const int i_mask_bits = p_fmt->i_chroma == FCC_RV24 ? 24 : 32;
 401     *pi_rindex = ( i_mask_bits - p_fmt->i_lrshift ) / 8;
 402     *pi_gindex = ( i_mask_bits - p_fmt->i_lgshift ) / 8;
 403     *pi_bindex = ( i_mask_bits - p_fmt->i_lbshift ) / 8;
 404 #else
 405     *pi_rindex = p_fmt->i_lrshift / 8;
 406     *pi_gindex = p_fmt->i_lgshift / 8;
 407     *pi_bindex = p_fmt->i_lbshift / 8;
 408 #endif
 409 }
 410
 411 /***********************************************************************
 412  * YUVA
 413  ***********************************************************************/
 414 static void BlendYUVAI420( filter_t *p_filter,
 415                            picture_t *p_dst, picture_t *p_src,
 416                            int i_x_offset, int i_y_offset,
 417                            int i_width, int i_height, int i_alpha )
 418 {
 419     int i_src_pitch, i_dst_pitch;
 420     uint8_t *p_src_y, *p_dst_y;
 421     uint8_t *p_src_u, *p_dst_u;
 422     uint8_t *p_src_v, *p_dst_v;
 423     uint8_t *p_trans;
 424     int i_x, i_y, i_trans = 0;
 425     bool b_even_scanline = i_y_offset % 2;
 426
 427     p_dst_y = vlc_plane_start( &i_dst_pitch, p_dst, Y_PLANE,
 428                                i_x_offset, i_y_offset, &p_filter->fmt_out.video, 1 );
 429     p_dst_u = vlc_plane_start( NULL, p_dst, U_PLANE,
 430                                i_x_offset, i_y_offset, &p_filter->fmt_out.video, 2 );
 431     p_dst_v = vlc_plane_start( NULL, p_dst, V_PLANE,
 432                                i_x_offset, i_y_offset, &p_filter->fmt_out.video, 2 );
 433
 434     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 435                                0, 0, &p_filter->fmt_in.video, 1 );
 436     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 437                                0, 0, &p_filter->fmt_in.video, 2 );
 438     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 439                                0, 0, &p_filter->fmt_in.video, 2 );
 440     p_trans = vlc_plane_start( NULL, p_src, A_PLANE,
 441                                0, 0, &p_filter->fmt_in.video, 1 );
 442
 443     /* Draw until we reach the bottom of the subtitle */
 444     for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src_pitch,
 445          p_dst_y += i_dst_pitch, p_src_y += i_src_pitch,
 446          p_dst_u += b_even_scanline ? i_dst_pitch/2 : 0,
 447          p_src_u += i_src_pitch,
 448          p_dst_v += b_even_scanline ? i_dst_pitch/2 : 0,
 449          p_src_v += i_src_pitch )
 450     {
 451         b_even_scanline = !b_even_scanline;
 452
 453         /* Draw until we reach the end of the line */
 454         for( i_x = 0; i_x < i_width; i_x++ )
 455         {
 456             if( p_trans )
 457                 i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 458
 459             if( !i_trans )
 460                 continue;
 461
 462             /* Blending */
 463             p_dst_y[i_x] = vlc_blend( p_src_y[i_x], p_dst_y[i_x], i_trans );
 464             if( b_even_scanline && i_x % 2 == 0 )
 465             {
 466                 p_dst_u[i_x/2] = vlc_blend( p_src_u[i_x], p_dst_u[i_x/2], i_trans );
 467                 p_dst_v[i_x/2] = vlc_blend( p_src_v[i_x], p_dst_v[i_x/2], i_trans );
 468             }
 469         }
 470     }
 471 }
 472
 473 static void BlendYUVARV16( filter_t *p_filter,
 474                            picture_t *p_dst_pic, picture_t *p_src,
 475                            int i_x_offset, int i_y_offset,
 476                            int i_width, int i_height, int i_alpha )
 477 {
 478     int i_src_pitch, i_dst_pitch;
 479     uint8_t *p_dst, *p_src_y;
 480     uint8_t *p_src_u, *p_src_v;
 481     uint8_t *p_trans;
 482     int i_x, i_y, i_pix_pitch, i_trans = 0;
 483     int r, g, b;
 484
 485     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
 486     i_dst_pitch = p_dst_pic->p->i_pitch;
 487     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 488             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 489             p_dst_pic->p->i_pitch *
 490             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 491
 492     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 493                                0, 0, &p_filter->fmt_in.video, 1 );
 494     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 495                                0, 0, &p_filter->fmt_in.video, 2 );
 496     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 497                                0, 0, &p_filter->fmt_in.video, 2 );
 498     p_trans = vlc_plane_start( NULL, p_src, A_PLANE,
 499                                0, 0, &p_filter->fmt_in.video, 1 );
 500
 501     /* Draw until we reach the bottom of the subtitle */
 502     for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src_pitch,
 503          p_dst += i_dst_pitch,
 504          p_src_y += i_src_pitch, p_src_u += i_src_pitch,
 505          p_src_v += i_src_pitch )
 506     {
 507         /* Draw until we reach the end of the line */
 508         for( i_x = 0; i_x < i_width; i_x++ )
 509         {
 510             if( p_trans )
 511                 i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 512             if( !i_trans )
 513                 continue;
 514
 515             /* Blending */
 516             yuv_to_rgb( &r, &g, &b,
 517                         p_src_y[i_x], p_src_u[i_x], p_src_v[i_x] );
 518
 519             vlc_blend_rgb16( (uint16_t*)&p_dst[i_x * i_pix_pitch],
 520                              r, g, b, i_trans, &p_filter->fmt_out.video );
 521         }
 522     }
 523 }
 524
 525 static void BlendYUVARV24( filter_t *p_filter,
 526                            picture_t *p_dst_pic, picture_t *p_src,
 527                            int i_x_offset, int i_y_offset,
 528                            int i_width, int i_height, int i_alpha )
 529 {
 530     int i_src_pitch, i_dst_pitch;
 531     uint8_t *p_dst, *p_src_y;
 532     uint8_t *p_src_u, *p_src_v;
 533     uint8_t *p_trans;
 534     int i_x, i_y, i_pix_pitch, i_trans = 0;
 535     int r, g, b;
 536
 537     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
 538     i_dst_pitch = p_dst_pic->p->i_pitch;
 539     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 540             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 541             p_dst_pic->p->i_pitch *
 542             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 543
 544     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 545                                0, 0, &p_filter->fmt_in.video, 1 );
 546     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 547                                0, 0, &p_filter->fmt_in.video, 2 );
 548     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 549                                0, 0, &p_filter->fmt_in.video, 2 );
 550     p_trans = vlc_plane_start( NULL, p_src, A_PLANE,
 551                                0, 0, &p_filter->fmt_in.video, 1 );
 552
 553     if( (i_pix_pitch == 4)
 554      && (((((intptr_t)p_dst)|i_dst_pitch) /* FIXME? */
 555           & 3) == 0) )
 556     {
 557         /*
 558         ** if picture pixels are 32 bits long and lines addresses are 32 bit
 559         ** aligned, optimize rendering
 560         */
 561         uint32_t *p32_dst = (uint32_t *)p_dst;
 562         uint32_t i32_dst_pitch = (uint32_t)(i_dst_pitch>>2);
 563
 564         int i_rshift, i_gshift, i_bshift;
 565         uint32_t i_rmask, i_gmask, i_bmask;
 566
 567         i_rmask = p_filter->fmt_out.video.i_rmask;
 568         i_gmask = p_filter->fmt_out.video.i_gmask;
 569         i_bmask = p_filter->fmt_out.video.i_bmask;
 570         i_rshift = p_filter->fmt_out.video.i_lrshift;
 571         i_gshift = p_filter->fmt_out.video.i_lgshift;
 572         i_bshift = p_filter->fmt_out.video.i_lbshift;
 573
 574         /* Draw until we reach the bottom of the subtitle */
 575         for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src_pitch,
 576              p32_dst += i32_dst_pitch,
 577              p_src_y += i_src_pitch, p_src_u += i_src_pitch,
 578              p_src_v += i_src_pitch )
 579         {
 580             /* Draw until we reach the end of the line */
 581             for( i_x = 0; i_x < i_width; i_x++ )
 582             {
 583                 if( p_trans )
 584                     i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 585                 if( !i_trans )
 586                     continue;
 587
 588                 if( i_trans == MAX_TRANS )
 589                 {
 590                     /* Completely opaque. Completely overwrite underlying pixel */
 591                     yuv_to_rgb( &r, &g, &b,
 592                                 p_src_y[i_x], p_src_u[i_x], p_src_v[i_x] );
 593
 594                     p32_dst[i_x] = (r<<i_rshift) |
 595                                    (g<<i_gshift) |
 596                                    (b<<i_bshift);
 597                 }
 598                 else
 599                 {
 600                     /* Blending */
 601                     uint32_t i_pix_dst = p32_dst[i_x];
 602                     yuv_to_rgb( &r, &g, &b,
 603                                 p_src_y[i_x], p_src_u[i_x], p_src_v[i_x] );
 604
 605                     p32_dst[i_x] = ( vlc_blend( r, (i_pix_dst & i_rmask)>>i_rshift, i_trans ) << i_rshift ) |
 606                                    ( vlc_blend( g, (i_pix_dst & i_gmask)>>i_gshift, i_trans ) << i_gshift ) |
 607                                    ( vlc_blend( b, (i_pix_dst & i_bmask)>>i_bshift, i_trans ) << i_bshift );
 608                 }
 609             }
 610         }
 611     }
 612     else
 613     {
 614         int i_rindex, i_gindex, i_bindex;
 615         uint32_t i_rmask, i_gmask, i_bmask;
 616
 617         i_rmask = p_filter->fmt_out.video.i_rmask;
 618         i_gmask = p_filter->fmt_out.video.i_gmask;
 619         i_bmask = p_filter->fmt_out.video.i_bmask;
 620
 621         vlc_rgb_index( &i_rindex, &i_gindex, &i_bindex, &p_filter->fmt_out.video );
 622
 623         /* Draw until we reach the bottom of the subtitle */
 624         for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src_pitch,
 625              p_dst += i_dst_pitch,
 626              p_src_y += i_src_pitch, p_src_u += i_src_pitch,
 627              p_src_v += i_src_pitch )
 628         {
 629             /* Draw until we reach the end of the line */
 630             for( i_x = 0; i_x < i_width; i_x++ )
 631             {
 632                 if( p_trans )
 633                     i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 634                 if( !i_trans )
 635                     continue;
 636
 637                 /* Blending */
 638                 yuv_to_rgb( &r, &g, &b,
 639                             p_src_y[i_x], p_src_u[i_x], p_src_v[i_x] );
 640
 641                 vlc_blend_packed( &p_dst[ i_x * i_pix_pitch],
 642                                   i_rindex, i_gindex, i_bindex,
 643                                   r, g, b, i_alpha, true );
 644             }
 645         }
 646     }
 647 }
 648
 649 static void BlendYUVAYUVPacked( filter_t *p_filter,
 650                                 picture_t *p_dst_pic, picture_t *p_src,
 651                                 int i_x_offset, int i_y_offset,
 652                                 int i_width, int i_height, int i_alpha )
 653 {
 654     int i_src_pitch, i_dst_pitch;
 655     uint8_t *p_dst, *p_src_y;
 656     uint8_t *p_src_u, *p_src_v;
 657     uint8_t *p_trans;
 658     int i_x, i_y, i_pix_pitch, i_trans = 0;
 659     bool b_even = !((i_x_offset + p_filter->fmt_out.video.i_x_offset)%2);
 660     int i_l_offset, i_u_offset, i_v_offset;
 661
 662     vlc_yuv_packed_index( &i_l_offset, &i_u_offset, &i_v_offset,
 663                           p_filter->fmt_out.video.i_chroma );
 664
 665     i_pix_pitch = 2;
 666     i_dst_pitch = p_dst_pic->p->i_pitch;
 667     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 668             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 669             p_dst_pic->p->i_pitch *
 670             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 671
 672     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 673                                0, 0, &p_filter->fmt_in.video, 1 );
 674     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 675                                0, 0, &p_filter->fmt_in.video, 2 );
 676     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 677                                0, 0, &p_filter->fmt_in.video, 2 );
 678     p_trans = vlc_plane_start( NULL, p_src, A_PLANE,
 679                                0, 0, &p_filter->fmt_in.video, 1 );
 680
 681     i_width &= ~1; /* Needs to be a multiple of 2 */
 682
 683     /* Draw until we reach the bottom of the subtitle */
 684     for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src_pitch,
 685          p_dst += i_dst_pitch,
 686          p_src_y += i_src_pitch, p_src_u += i_src_pitch,
 687          p_src_v += i_src_pitch )
 688     {
 689         /* Draw until we reach the end of the line */
 690         for( i_x = 0; i_x < i_width; i_x++, b_even = !b_even )
 691         {
 692             i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 693             if( !i_trans )
 694                 continue;
 695
 696             /* Blending */
 697             if( b_even )
 698             {
 699                 int i_u;
 700                 int i_v;
 701                 /* FIXME what's with 0xaa ? */
 702                 if( p_trans[i_x+1] > 0xaa )
 703                 {
 704                     i_u = (p_src_u[i_x]+p_src_u[i_x+1])>>1;
 705                     i_v = (p_src_v[i_x]+p_src_v[i_x+1])>>1;
 706                 }
 707                 else
 708                 {
 709                     i_u = p_src_u[i_x];
 710                     i_v = p_src_v[i_x];
 711                 }
 712
 713                 vlc_blend_packed( &p_dst[i_x * 2],
 714                                   i_l_offset, i_u_offset, i_v_offset,
 715                                   p_src_y[i_x], i_u, i_v, i_trans, true );
 716             }
 717             else
 718             {
 719                 p_dst[i_x * 2 + i_l_offset] = vlc_blend( p_src_y[i_x], p_dst[i_x * 2 + i_l_offset], i_trans );
 720             }
 721         }
 722     }
 723 }
 724 /***********************************************************************
 725  * I420, YV12
 726  ***********************************************************************/
 727 static void BlendI420I420( filter_t *p_filter,
 728                            picture_t *p_dst, picture_t *p_src,
 729                            int i_x_offset, int i_y_offset,
 730                            int i_width, int i_height, int i_alpha )
 731 {
 732     int i_src_pitch, i_dst_pitch;
 733     uint8_t *p_src_y, *p_dst_y;
 734     uint8_t *p_src_u, *p_dst_u;
 735     uint8_t *p_src_v, *p_dst_v;
 736     int i_x, i_y;
 737     bool b_even_scanline = i_y_offset % 2;
 738
 739     if( i_alpha == 0xff )
 740     {
 741         BlendI420I420_no_alpha( p_filter, p_dst, p_src,
 742                                 i_x_offset, i_y_offset, i_width, i_height );
 743         return;
 744     }
 745
 746
 747     i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
 748     p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
 749               p_filter->fmt_out.video.i_x_offset +
 750               p_dst->p[Y_PLANE].i_pitch *
 751               ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 752     p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
 753               p_filter->fmt_out.video.i_x_offset/2 +
 754               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 755               p_dst->p[U_PLANE].i_pitch;
 756     p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
 757               p_filter->fmt_out.video.i_x_offset/2 +
 758               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 759               p_dst->p[V_PLANE].i_pitch;
 760
 761     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 762                                0, 0, &p_filter->fmt_in.video, 1 );
 763     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 764                                0, 0, &p_filter->fmt_in.video, 2 );
 765     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 766                                0, 0, &p_filter->fmt_in.video, 2 );
 767     i_width &= ~1;
 768
 769     /* Draw until we reach the bottom of the subtitle */
 770     for( i_y = 0; i_y < i_height; i_y++,
 771          p_dst_y += i_dst_pitch,
 772          p_src_y += i_src_pitch )
 773     {
 774         if( b_even_scanline )
 775         {
 776             p_dst_u  += i_dst_pitch/2;
 777             p_dst_v  += i_dst_pitch/2;
 778         }
 779         b_even_scanline = !b_even_scanline;
 780
 781         /* Draw until we reach the end of the line */
 782         for( i_x = 0; i_x < i_width; i_x++ )
 783         {
 784             if( !i_alpha )
 785                 continue;
 786
 787             /* Blending */
 788             p_dst_y[i_x] = vlc_blend( p_src_y[i_x], p_dst_y[i_x], i_alpha );
 789             if( b_even_scanline && i_x % 2 == 0 )
 790             {
 791                 p_dst_u[i_x/2] = vlc_blend( p_src_u[i_x/2], p_dst_u[i_x/2], i_alpha );
 792                 p_dst_v[i_x/2] = vlc_blend( p_src_v[i_x/2], p_dst_v[i_x/2], i_alpha );
 793             }
 794         }
 795         if( i_y%2 == 1 )
 796         {
 797             p_src_u += i_src_pitch/2;
 798             p_src_v += i_src_pitch/2;
 799         }
 800     }
 801 }
 802 static void BlendI420I420_no_alpha( filter_t *p_filter,
 803                                     picture_t *p_dst, picture_t *p_src,
 804                                     int i_x_offset, int i_y_offset,
 805                                     int i_width, int i_height )
 806 {
 807     int i_src_pitch, i_dst_pitch;
 808     uint8_t *p_src_y, *p_dst_y;
 809     uint8_t *p_src_u, *p_dst_u;
 810     uint8_t *p_src_v, *p_dst_v;
 811     int i_y;
 812     bool b_even_scanline = i_y_offset % 2;
 813
 814     i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
 815     p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
 816               p_filter->fmt_out.video.i_x_offset +
 817               p_dst->p[Y_PLANE].i_pitch *
 818               ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 819     p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
 820               p_filter->fmt_out.video.i_x_offset/2 +
 821               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 822               p_dst->p[U_PLANE].i_pitch;
 823     p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
 824               p_filter->fmt_out.video.i_x_offset/2 +
 825               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 826               p_dst->p[V_PLANE].i_pitch;
 827
 828     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 829                                0, 0, &p_filter->fmt_in.video, 1 );
 830     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 831                                0, 0, &p_filter->fmt_in.video, 2 );
 832     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 833                                0, 0, &p_filter->fmt_in.video, 2 );
 834
 835     i_width &= ~1;
 836
 837     /* Draw until we reach the bottom of the subtitle */
 838     for( i_y = 0; i_y < i_height;
 839             i_y++, p_dst_y += i_dst_pitch, p_src_y += i_src_pitch )
 840     {
 841         /* Completely opaque. Completely overwrite underlying pixel */
 842         vlc_memcpy( p_dst_y, p_src_y, i_width );
 843         if( b_even_scanline )
 844         {
 845             p_dst_u  += i_dst_pitch/2;
 846             p_dst_v  += i_dst_pitch/2;
 847         }
 848         else
 849         {
 850             vlc_memcpy( p_dst_u, p_src_u, i_width/2 );
 851             vlc_memcpy( p_dst_v, p_src_v, i_width/2 );
 852         }
 853         b_even_scanline = !b_even_scanline;
 854         if( i_y%2 == 1 )
 855         {
 856             p_src_u += i_src_pitch/2;
 857             p_src_v += i_src_pitch/2;
 858         }
 859     }
 860 }
 861
 862 static void BlendI420R16( filter_t *p_filter,
 863                           picture_t *p_dst_pic, picture_t *p_src,
 864                           int i_x_offset, int i_y_offset,
 865                           int i_width, int i_height, int i_alpha )
 866 {
 867     int i_src_pitch, i_dst_pitch;
 868     uint8_t *p_dst, *p_src_y;
 869     uint8_t *p_src_u, *p_src_v;
 870     int i_x, i_y, i_pix_pitch;
 871     int r, g, b;
 872
 873     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
 874     i_dst_pitch = p_dst_pic->p->i_pitch;
 875     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 876             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 877             p_dst_pic->p->i_pitch *
 878             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 879
 880     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 881                                0, 0, &p_filter->fmt_in.video, 1 );
 882     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 883                                0, 0, &p_filter->fmt_in.video, 2 );
 884     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 885                                 0, 0, &p_filter->fmt_in.video, 2 );
 886
 887     /* Draw until we reach the bottom of the subtitle */
 888     for( i_y = 0; i_y < i_height; i_y++,
 889          p_dst += i_dst_pitch,
 890          p_src_y += i_src_pitch )
 891     {
 892         /* Draw until we reach the end of the line */
 893         for( i_x = 0; i_x < i_width; i_x++ )
 894         {
 895             /* Blending */
 896             yuv_to_rgb( &r, &g, &b,
 897                         p_src_y[i_x], p_src_u[i_x/2], p_src_v[i_x/2] );
 898
 899             vlc_blend_rgb16( (uint16_t*)&p_dst[i_x * i_pix_pitch],
 900                              r, g, b, i_alpha, &p_filter->fmt_out.video );
 901         }
 902         if( i_y%2 == 1 )
 903         {
 904             p_src_u += i_src_pitch/2;
 905             p_src_v += i_src_pitch/2;
 906         }
 907     }
 908 }
 909
 910 static void BlendI420R24( filter_t *p_filter,
 911                           picture_t *p_dst_pic, picture_t *p_src,
 912                           int i_x_offset, int i_y_offset,
 913                           int i_width, int i_height, int i_alpha )
 914 {
 915     int i_src_pitch, i_dst_pitch;
 916     uint8_t *p_dst, *p_src_y;
 917     uint8_t *p_src_u, *p_src_v;
 918     int i_x, i_y, i_pix_pitch;
 919     int i_rindex, i_gindex, i_bindex;
 920     int r, g, b;
 921
 922     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
 923     i_dst_pitch = p_dst_pic->p->i_pitch;
 924     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 925             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 926             p_dst_pic->p->i_pitch *
 927             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 928
 929     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 930                                0, 0, &p_filter->fmt_in.video, 1 );
 931     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 932                                0, 0, &p_filter->fmt_in.video, 2 );
 933     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 934                                0, 0, &p_filter->fmt_in.video, 2 );
 935
 936     vlc_rgb_index( &i_rindex, &i_gindex, &i_bindex, &p_filter->fmt_out.video );
 937
 938     /* Draw until we reach the bottom of the subtitle */
 939     for( i_y = 0; i_y < i_height; i_y++,
 940          p_dst += i_dst_pitch,
 941          p_src_y += i_src_pitch, p_src_u += i_src_pitch,
 942          p_src_v += i_src_pitch )
 943     {
 944         /* Draw until we reach the end of the line */
 945         for( i_x = 0; i_x < i_width; i_x++ )
 946         {
 947             if( !i_alpha )
 948                 continue;
 949
 950             /* Blending */
 951             yuv_to_rgb( &r, &g, &b,
 952                         p_src_y[i_x], p_src_u[i_x/2], p_src_v[i_x/2] );
 953
 954             vlc_blend_packed( &p_dst[i_x * i_pix_pitch],
 955                               i_rindex, i_gindex, i_bindex, r, g, b, i_alpha, true );
 956         }
 957         if( i_y%2 == 1 )
 958         {
 959             p_src_u += i_src_pitch/2;
 960             p_src_v += i_src_pitch/2;
 961         }
 962     }
 963 }
 964
 965 static void BlendI420YUVPacked( filter_t *p_filter,
 966                                 picture_t *p_dst_pic, picture_t *p_src,
 967                                 int i_x_offset, int i_y_offset,
 968                                 int i_width, int i_height, int i_alpha )
 969 {
 970     int i_src_pitch, i_dst_pitch;
 971     uint8_t *p_dst, *p_src_y;
 972     uint8_t *p_src_u, *p_src_v;
 973     int i_x, i_y, i_pix_pitch;
 974     bool b_even = !((i_x_offset + p_filter->fmt_out.video.i_x_offset)%2);
 975     int i_l_offset, i_u_offset, i_v_offset;
 976
 977     vlc_yuv_packed_index( &i_l_offset, &i_u_offset, &i_v_offset,
 978                           p_filter->fmt_out.video.i_chroma );
 979
 980     i_pix_pitch = 2;
 981     i_dst_pitch = p_dst_pic->p->i_pitch;
 982     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 983             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 984             p_dst_pic->p->i_pitch *
 985             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 986
 987     p_src_y = vlc_plane_start( &i_src_pitch, p_src, Y_PLANE,
 988                                0, 0, &p_filter->fmt_in.video, 1 );
 989     p_src_u = vlc_plane_start( NULL, p_src, U_PLANE,
 990                                0, 0, &p_filter->fmt_in.video, 2 );
 991     p_src_v = vlc_plane_start( NULL, p_src, V_PLANE,
 992                                0, 0, &p_filter->fmt_in.video, 2 );
 993
 994     i_width &= ~1; /* Needs to be a multiple of 2 */
 995
 996     /* Draw until we reach the bottom of the subtitle */
 997     for( i_y = 0; i_y < i_height; i_y++,
 998          p_dst += i_dst_pitch,
 999          p_src_y += i_src_pitch, p_src_u += i_src_pitch,
1000          p_src_v += i_src_pitch )
1001     {
1002         /* Draw until we reach the end of the line */
1003         for( i_x = 0; i_x < i_width; i_x++, b_even = !b_even )
1004         {
1005             if( !i_alpha )
1006                 continue;
1007
1008             /* Blending */
1009             vlc_blend_packed( &p_dst[i_x * 2],
1010                               i_l_offset, i_u_offset, i_v_offset,
1011                               p_src_y[i_x], p_src_u[i_x/2], p_src_v[i_x/2], i_alpha, b_even );
1012         }
1013         if( i_y%2 == 1 )
1014         {
1015             p_src_u += i_src_pitch/2;
1016             p_src_v += i_src_pitch/2;
1017         }
1018     }
1019 }
1020
1021 /***********************************************************************
1022  * YUVP
1023  ***********************************************************************/
1024 static void BlendPalI420( filter_t *p_filter,
1025                           picture_t *p_dst, picture_t *p_src_pic,
1026                           int i_x_offset, int i_y_offset,
1027                           int i_width, int i_height, int i_alpha )
1028 {
1029     int i_src_pitch, i_dst_pitch;
1030     uint8_t *p_src, *p_dst_y;
1031     uint8_t *p_dst_u;
1032     uint8_t *p_dst_v;
1033     int i_x, i_y, i_trans;
1034     bool b_even_scanline = i_y_offset % 2;
1035
1036     i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
1037     p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
1038               p_filter->fmt_out.video.i_x_offset +
1039               p_dst->p[Y_PLANE].i_pitch *
1040               ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1041     p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
1042               p_filter->fmt_out.video.i_x_offset/2 +
1043               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1044               p_dst->p[U_PLANE].i_pitch;
1045     p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
1046               p_filter->fmt_out.video.i_x_offset/2 +
1047               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1048               p_dst->p[V_PLANE].i_pitch;
1049
1050     i_src_pitch = p_src_pic->p->i_pitch;
1051     p_src = p_src_pic->p->p_pixels + p_filter->fmt_in.video.i_x_offset +
1052             i_src_pitch * p_filter->fmt_in.video.i_y_offset;
1053
1054 #define p_pal p_filter->fmt_in.video.p_palette->palette
1055
1056     /* Draw until we reach the bottom of the subtitle */
1057     for( i_y = 0; i_y < i_height; i_y++,
1058          p_dst_y += i_dst_pitch,
1059          p_src += i_src_pitch,
1060          p_dst_u += b_even_scanline ? i_dst_pitch/2 : 0,
1061          p_dst_v += b_even_scanline ? i_dst_pitch/2 : 0 )
1062     {
1063         const uint8_t *p_trans = p_src;
1064         b_even_scanline = !b_even_scanline;
1065
1066         /* Draw until we reach the end of the line */
1067         for( i_x = 0; i_x < i_width; i_x++ )
1068         {
1069             i_trans = vlc_alpha( p_pal[p_trans[i_x]][3], i_alpha );
1070             if( !i_trans )
1071                 continue;
1072
1073             /* Blending */
1074             p_dst_y[i_x] = vlc_blend( p_pal[p_src[i_x]][0], p_dst_y[i_x], i_trans );
1075             if( b_even_scanline && ((i_x % 2) == 0) )
1076             {
1077                 p_dst_u[i_x/2] = vlc_blend( p_pal[p_src[i_x]][1], p_dst_u[i_x/2], i_trans );
1078                 p_dst_v[i_x/2] = vlc_blend( p_pal[p_src[i_x]][2], p_dst_v[i_x/2], i_trans );
1079             }
1080         }
1081     }
1082 #undef p_pal
1083 }
1084
1085 static void BlendPalYUVPacked( filter_t *p_filter,
1086                                picture_t *p_dst_pic, picture_t *p_src_pic,
1087                                int i_x_offset, int i_y_offset,
1088                                int i_width, int i_height, int i_alpha )
1089 {
1090     int i_src_pitch, i_dst_pitch;
1091     uint8_t *p_src, *p_dst;
1092     int i_x, i_y, i_pix_pitch, i_trans;
1093     bool b_even = !((i_x_offset + p_filter->fmt_out.video.i_x_offset)%2);
1094     int i_l_offset, i_u_offset, i_v_offset;
1095
1096     vlc_yuv_packed_index( &i_l_offset, &i_u_offset, &i_v_offset,
1097                           p_filter->fmt_out.video.i_chroma );
1098
1099     i_pix_pitch = 2;
1100     i_dst_pitch = p_dst_pic->p->i_pitch;
1101     p_dst = p_dst_pic->p->p_pixels + i_pix_pitch * (i_x_offset +
1102             p_filter->fmt_out.video.i_x_offset) + p_dst_pic->p->i_pitch *
1103             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1104
1105     i_src_pitch = p_src_pic->p->i_pitch;
1106     p_src = p_src_pic->p->p_pixels + p_filter->fmt_in.video.i_x_offset +
1107             i_src_pitch * p_filter->fmt_in.video.i_y_offset;
1108
1109     i_width &= ~1; /* Needs to be a multiple of 2 */
1110
1111 #define p_pal p_filter->fmt_in.video.p_palette->palette
1112
1113     /* Draw until we reach the bottom of the subtitle */
1114     for( i_y = 0; i_y < i_height; i_y++,
1115          p_dst += i_dst_pitch, p_src += i_src_pitch )
1116     {
1117         const uint8_t *p_trans = p_src;
1118         /* Draw until we reach the end of the line */
1119         for( i_x = 0; i_x < i_width; i_x++, b_even = !b_even )
1120         {
1121             i_trans = vlc_alpha( p_pal[p_trans[i_x]][3], i_alpha );
1122             if( !i_trans )
1123                 continue;
1124
1125             /* Blending */
1126             if( b_even )
1127             {
1128                 uint16_t i_u;
1129                 uint16_t i_v;
1130                 if( p_trans[i_x+1] > 0xaa )
1131                 {
1132                     i_u = (p_pal[p_src[i_x]][1] + p_pal[p_src[i_x+1]][1]) >> 1;
1133                     i_v = (p_pal[p_src[i_x]][2] + p_pal[p_src[i_x+1]][2]) >> 1;
1134                 }
1135                 else
1136                 {
1137                     i_u = p_pal[p_src[i_x]][1];
1138                     i_v = p_pal[p_src[i_x]][2];
1139                 }
1140
1141                 vlc_blend_packed( &p_dst[i_x * 2],
1142                                   i_l_offset, i_u_offset, i_v_offset,
1143                                   p_pal[p_src[i_x]][0], i_u, i_v, i_trans, true );
1144             }
1145             else
1146             {
1147                 p_dst[i_x * 2 + i_l_offset] = vlc_blend( p_pal[p_src[i_x]][0], p_dst[i_x * 2 + i_l_offset], i_trans );
1148             }
1149         }
1150     }
1151 #undef p_pal
1152 }
1153
1154 static void BlendPalRV( filter_t *p_filter,
1155                         picture_t *p_dst_pic, picture_t *p_src_pic,
1156                         int i_x_offset, int i_y_offset,
1157                         int i_width, int i_height, int i_alpha )
1158 {
1159     int i_src_pitch, i_dst_pitch;
1160     uint8_t *p_src, *p_dst;
1161     int i_x, i_y, i_pix_pitch, i_trans;
1162     video_palette_t rgbpalette;
1163     int i_rindex, i_gindex, i_bindex;
1164
1165     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
1166     i_dst_pitch = p_dst_pic->p->i_pitch;
1167     p_dst = p_dst_pic->p->p_pixels + i_pix_pitch * (i_x_offset +
1168             p_filter->fmt_out.video.i_x_offset) + p_dst_pic->p->i_pitch *
1169             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1170
1171     i_src_pitch = p_src_pic->p->i_pitch;
1172     p_src = p_src_pic->p->p_pixels + p_filter->fmt_in.video.i_x_offset +
1173             i_src_pitch * p_filter->fmt_in.video.i_y_offset;
1174
1175 #define p_pal p_filter->fmt_in.video.p_palette->palette
1176 #define rgbpal rgbpalette.palette
1177
1178     /* Convert palette first */
1179     for( i_y = 0; i_y < p_filter->fmt_in.video.p_palette->i_entries && i_y < 256; i_y++ )
1180     {
1181         int r, g, b;
1182
1183         yuv_to_rgb( &r, &g, &b, p_pal[i_y][0], p_pal[i_y][1], p_pal[i_y][2] );
1184         rgbpal[i_y][0] = r;
1185         rgbpal[i_y][1] = g;
1186         rgbpal[i_y][2] = b;
1187     }
1188
1189     /* */
1190     vlc_rgb_index( &i_rindex, &i_gindex, &i_bindex, &p_filter->fmt_out.video );
1191
1192     /* Draw until we reach the bottom of the subtitle */
1193     for( i_y = 0; i_y < i_height; i_y++,
1194          p_dst += i_dst_pitch, p_src += i_src_pitch )
1195     {
1196         const uint8_t *p_trans = p_src;
1197         /* Draw until we reach the end of the line */
1198         for( i_x = 0; i_x < i_width; i_x++ )
1199         {
1200             i_trans = vlc_alpha( p_pal[p_trans[i_x]][3], i_alpha );
1201             if( !i_trans )
1202                 continue;
1203
1204             /* Blending */
1205             if( p_filter->fmt_out.video.i_chroma == FCC_RV15 || p_filter->fmt_out.video.i_chroma == FCC_RV16 )
1206                 vlc_blend_rgb16( (uint16_t*)&p_dst[i_x * i_pix_pitch],
1207                                   rgbpal[p_src[i_x]][0], rgbpal[p_src[i_x]][1], rgbpal[p_src[i_x]][2],
1208                                   i_trans,
1209                                   &p_filter->fmt_out.video );
1210             else
1211                 vlc_blend_packed( &p_dst[i_x * i_pix_pitch],
1212                                   i_rindex, i_gindex, i_bindex,
1213                                   rgbpal[p_src[i_x]][0], rgbpal[p_src[i_x]][1], rgbpal[p_src[i_x]][2],
1214                                   i_trans, true );
1215         }
1216     }
1217
1218 #undef p_pal
1219 #undef rgbpal
1220 }
1221
1222 /***********************************************************************
1223  * RGBA
1224  ***********************************************************************/
1225 static void BlendRGBAI420( filter_t *p_filter,
1226                            picture_t *p_dst, picture_t *p_src_pic,
1227                            int i_x_offset, int i_y_offset,
1228                            int i_width, int i_height, int i_alpha )
1229 {
1230     int i_src_pitch, i_dst_pitch, i_src_pix_pitch;
1231     uint8_t *p_dst_y;
1232     uint8_t *p_dst_u;
1233     uint8_t *p_dst_v;
1234     uint8_t *p_src;
1235     int i_x, i_y, i_trans;
1236     uint8_t y, u, v;
1237
1238     bool b_even_scanline = i_y_offset % 2;
1239
1240     i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
1241     p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
1242               p_filter->fmt_out.video.i_x_offset +
1243               p_dst->p[Y_PLANE].i_pitch *
1244               ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1245     p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
1246               p_filter->fmt_out.video.i_x_offset/2 +
1247               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1248               p_dst->p[U_PLANE].i_pitch;
1249     p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
1250               p_filter->fmt_out.video.i_x_offset/2 +
1251               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1252               p_dst->p[V_PLANE].i_pitch;
1253
1254     i_src_pix_pitch = p_src_pic->p->i_pixel_pitch;
1255     i_src_pitch = p_src_pic->p->i_pitch;
1256     p_src = p_src_pic->p->p_pixels +
1257             p_filter->fmt_in.video.i_x_offset * i_src_pix_pitch +
1258             p_src_pic->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
1259
1260
1261     /* Draw until we reach the bottom of the subtitle */
1262     for( i_y = 0; i_y < i_height; i_y++,
1263          p_dst_y += i_dst_pitch,
1264          p_dst_u += b_even_scanline ? i_dst_pitch/2 : 0,
1265          p_dst_v += b_even_scanline ? i_dst_pitch/2 : 0,
1266          p_src += i_src_pitch )
1267     {
1268         b_even_scanline = !b_even_scanline;
1269
1270         /* Draw until we reach the end of the line */
1271         for( i_x = 0; i_x < i_width; i_x++ )
1272         {
1273             const int R = p_src[i_x * i_src_pix_pitch + 0];
1274             const int G = p_src[i_x * i_src_pix_pitch + 1];
1275             const int B = p_src[i_x * i_src_pix_pitch + 2];
1276
1277             i_trans = vlc_alpha( p_src[i_x * i_src_pix_pitch + 3], i_alpha );
1278             if( !i_trans )
1279                 continue;
1280
1281             /* Blending */
1282             rgb_to_yuv( &y, &u, &v, R, G, B );
1283
1284             p_dst_y[i_x] = vlc_blend( y, p_dst_y[i_x], i_trans );
1285             if( b_even_scanline && i_x % 2 == 0 )
1286             {
1287                 p_dst_u[i_x/2] = vlc_blend( u, p_dst_u[i_x/2], i_trans );
1288                 p_dst_v[i_x/2] = vlc_blend( v, p_dst_v[i_x/2], i_trans );
1289             }
1290         }
1291     }
1292 }
1293
1294 static void BlendRGBAR24( filter_t *p_filter,
1295                           picture_t *p_dst_pic, picture_t *p_src_pic,
1296                           int i_x_offset, int i_y_offset,
1297                           int i_width, int i_height, int i_alpha )
1298 {
1299     int i_src_pitch, i_dst_pitch;
1300     uint8_t *p_dst, *p_src;
1301     int i_x, i_y, i_pix_pitch, i_trans, i_src_pix_pitch;
1302     int i_rindex, i_gindex, i_bindex;
1303
1304     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
1305     i_dst_pitch = p_dst_pic->p->i_pitch;
1306     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
1307             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1308             p_dst_pic->p->i_pitch *
1309             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1310
1311     i_src_pix_pitch = p_src_pic->p->i_pixel_pitch;
1312     i_src_pitch = p_src_pic->p->i_pitch;
1313     p_src = p_src_pic->p->p_pixels +
1314             p_filter->fmt_in.video.i_x_offset * i_src_pix_pitch +
1315             p_src_pic->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
1316
1317     vlc_rgb_index( &i_rindex, &i_gindex, &i_bindex, &p_filter->fmt_out.video );
1318
1319     /* Draw until we reach the bottom of the subtitle */
1320     for( i_y = 0; i_y < i_height; i_y++,
1321          p_dst += i_dst_pitch, p_src += i_src_pitch )
1322     {
1323         /* Draw until we reach the end of the line */
1324         for( i_x = 0; i_x < i_width; i_x++ )
1325         {
1326             const int R = p_src[i_x * i_src_pix_pitch + 0];
1327             const int G = p_src[i_x * i_src_pix_pitch + 1];
1328             const int B = p_src[i_x * i_src_pix_pitch + 2];
1329
1330             i_trans = vlc_alpha( p_src[i_x * i_src_pix_pitch + 3], i_alpha );
1331             if( !i_trans )
1332                 continue;
1333
1334             /* Blending */
1335             vlc_blend_packed( &p_dst[i_x * i_pix_pitch],
1336                               i_rindex, i_gindex, i_bindex,
1337                               R, G, B, i_trans, true );
1338         }
1339     }
1340 }
1341
1342 static void BlendRGBAR16( filter_t *p_filter,
1343                           picture_t *p_dst_pic, picture_t *p_src_pic,
1344                           int i_x_offset, int i_y_offset,
1345                           int i_width, int i_height, int i_alpha )
1346 {
1347     int i_src_pitch, i_dst_pitch;
1348     uint8_t *p_dst, *p_src;
1349     int i_x, i_y, i_pix_pitch, i_trans, i_src_pix_pitch;
1350
1351     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
1352     i_dst_pitch = p_dst_pic->p->i_pitch;
1353     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
1354             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1355             p_dst_pic->p->i_pitch *
1356             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1357
1358     i_src_pix_pitch = p_src_pic->p->i_pixel_pitch;
1359     i_src_pitch = p_src_pic->p->i_pitch;
1360     p_src = p_src_pic->p->p_pixels +
1361             p_filter->fmt_in.video.i_x_offset * i_src_pix_pitch +
1362             p_src_pic->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
1363
1364     /* Draw until we reach the bottom of the subtitle */
1365     for( i_y = 0; i_y < i_height; i_y++,
1366          p_dst += i_dst_pitch, p_src += i_src_pitch )
1367     {
1368         /* Draw until we reach the end of the line */
1369         for( i_x = 0; i_x < i_width; i_x++ )
1370         {
1371             const int R = p_src[i_x * i_src_pix_pitch + 0];
1372             const int G = p_src[i_x * i_src_pix_pitch + 1];
1373             const int B = p_src[i_x * i_src_pix_pitch + 2];
1374
1375             i_trans = vlc_alpha( p_src[i_x * i_src_pix_pitch + 3], i_alpha );
1376             if( !i_trans )
1377                 continue;
1378
1379             /* Blending */
1380             vlc_blend_rgb16( (uint16_t*)&p_dst[i_x * i_pix_pitch],
1381                              R, G, B, i_trans, &p_filter->fmt_out.video );
1382         }
1383     }
1384 }
1385
1386 static void BlendRGBAYUVPacked( filter_t *p_filter,
1387                                 picture_t *p_dst_pic, picture_t *p_src_pic,
1388                                 int i_x_offset, int i_y_offset,
1389                                 int i_width, int i_height, int i_alpha )
1390 {
1391     int i_src_pitch, i_dst_pitch, i_src_pix_pitch;
1392     uint8_t *p_dst, *p_src;
1393     int i_x, i_y, i_pix_pitch, i_trans;
1394     bool b_even = !((i_x_offset + p_filter->fmt_out.video.i_x_offset)%2);
1395     int i_l_offset, i_u_offset, i_v_offset;
1396     uint8_t y, u, v;
1397
1398     vlc_yuv_packed_index( &i_l_offset, &i_u_offset, &i_v_offset,
1399                           p_filter->fmt_out.video.i_chroma );
1400
1401     i_pix_pitch = 2;
1402     i_dst_pitch = p_dst_pic->p->i_pitch;
1403     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
1404             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1405             p_dst_pic->p->i_pitch *
1406             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1407
1408     i_src_pix_pitch = p_src_pic->p->i_pixel_pitch;
1409     i_src_pitch = p_src_pic->p->i_pitch;
1410     p_src = p_src_pic->p->p_pixels +
1411             p_filter->fmt_in.video.i_x_offset * i_src_pitch +
1412             p_src_pic->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
1413
1414     i_width &= ~1; /* Needs to be a multiple of 2 */
1415
1416     /* Draw until we reach the bottom of the subtitle */
1417     for( i_y = 0; i_y < i_height; i_y++,
1418          p_dst += i_dst_pitch,
1419          p_src += i_src_pitch )
1420     {
1421         /* Draw until we reach the end of the line */
1422         for( i_x = 0; i_x < i_width; i_x++, b_even = !b_even )
1423         {
1424             const int R = p_src[i_x * i_src_pix_pitch + 0];
1425             const int G = p_src[i_x * i_src_pix_pitch + 1];
1426             const int B = p_src[i_x * i_src_pix_pitch + 2];
1427
1428             i_trans = vlc_alpha( p_src[i_x * i_src_pix_pitch + 3], i_alpha );
1429             if( !i_trans )
1430                 continue;
1431
1432             /* Blending */
1433             rgb_to_yuv( &y, &u, &v, R, G, B );
1434
1435             vlc_blend_packed( &p_dst[i_x * 2],
1436                               i_l_offset, i_u_offset, i_v_offset,
1437                               y, u, v, i_trans, b_even );
1438         }
1439     }
1440 }