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 *, picture_t *,
  77                    int, int, int );
  78
  79 /* YUVA */
  80 static void BlendYUVAI420( filter_t *, picture_t *, picture_t *, picture_t *,
  81                            int, int, int, int, int );
  82 static void BlendYUVARV16( filter_t *, picture_t *, picture_t *, picture_t *,
  83                            int, int, int, int, int );
  84 static void BlendYUVARV24( filter_t *, picture_t *, picture_t *, picture_t *,
  85                            int, int, int, int, int );
  86 static void BlendYUVAYUVPacked( filter_t *, picture_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 *, picture_t *,
  91                            int, int, int, int, int );
  92 static void BlendI420I420_no_alpha(
  93                            filter_t *, picture_t *, picture_t *, picture_t *,
  94                            int, int, int, int );
  95 static void BlendI420R16( filter_t *, picture_t *, picture_t *, picture_t *,
  96                            int, int, int, int, int );
  97 static void BlendI420R24( filter_t *, picture_t *, picture_t *, picture_t *,
  98                           int, int, int, int, int );
  99 static void BlendI420YUVPacked( filter_t *, picture_t *, picture_t *,
 100                                 picture_t *, int, int, int, int, int );
 101
 102 /* YUVP */
 103 static void BlendPalI420( filter_t *, picture_t *, picture_t *, picture_t *,
 104                           int, int, int, int, int );
 105 static void BlendPalYUVPacked( filter_t *, picture_t *, picture_t *, picture_t *,
 106                                int, int, int, int, int );
 107 static void BlendPalRV( filter_t *, picture_t *, picture_t *, picture_t *,
 108                         int, int, int, int, int );
 109
 110 /* RGBA */
 111 static void BlendRGBAI420( filter_t *, picture_t *, picture_t *, picture_t *,
 112                            int, int, int, int, int );
 113 static void BlendRGBAYUVPacked( filter_t *, picture_t *, picture_t *,
 114                                 picture_t *, int, int, int, int, int );
 115 static void BlendRGBAR16( filter_t *, picture_t *, picture_t *, picture_t *,
 116                           int, int, int, int, int );
 117 static void BlendRGBAR24( filter_t *, picture_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 *, picture_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, picture_t *p_dst,
 211                    picture_t *p_dst_orig, 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_dst_orig, p_src,
 247                                      i_x_offset, i_y_offset, i_width, i_height, i_alpha );
 248             return;
 249         }
 250     }
 251
 252     msg_Dbg( p_filter, "no matching alpha blending routine "
 253              "(chroma: %4.4s -> %4.4s)",
 254              (char *)&p_filter->fmt_in.video.i_chroma,
 255              (char *)&p_filter->fmt_out.video.i_chroma );
 256 }
 257
 258 /***********************************************************************
 259  * Utils
 260  ***********************************************************************/
 261 static inline uint8_t vlc_uint8( int v )
 262 {
 263     if( v > 255 )
 264         return 255;
 265     else if( v < 0 )
 266         return 0;
 267     return v;
 268 }
 269
 270 #define MAX_TRANS 255
 271 #define TRANS_BITS  8
 272
 273 static inline int vlc_blend( int v1, int v2, int a )
 274 {
 275     /* TODO bench if the tests really increase speed */
 276     if( a == 0 )
 277         return v2;
 278     else if( a == MAX_TRANS )
 279         return v1;
 280     return ( v1 * a + v2 * (MAX_TRANS - a ) ) >> TRANS_BITS;
 281 }
 282
 283 static inline int vlc_alpha( int t, int a )
 284 {
 285     if( a == 255 )
 286         return t;
 287     return (t * a) / 255;
 288 }
 289
 290 static inline void yuv_to_rgb( int *r, int *g, int *b,
 291                                uint8_t y1, uint8_t u1, uint8_t v1 )
 292 {
 293     /* macros used for YUV pixel conversions */
 294 #   define SCALEBITS 10
 295 #   define ONE_HALF  (1 << (SCALEBITS - 1))
 296 #   define FIX(x)    ((int) ((x) * (1<<SCALEBITS) + 0.5))
 297
 298     int y, cb, cr, r_add, g_add, b_add;
 299
 300     cb = u1 - 128;
 301     cr = v1 - 128;
 302     r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;
 303     g_add = - FIX(0.34414*255.0/224.0) * cb
 304             - FIX(0.71414*255.0/224.0) * cr + ONE_HALF;
 305     b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;
 306     y = (y1 - 16) * FIX(255.0/219.0);
 307     *r = vlc_uint8( (y + r_add) >> SCALEBITS );
 308     *g = vlc_uint8( (y + g_add) >> SCALEBITS );
 309     *b = vlc_uint8( (y + b_add) >> SCALEBITS );
 310 #undef FIX
 311 #undef ONE_HALF
 312 #undef SCALEBITS
 313 }
 314
 315 static inline void rgb_to_yuv( uint8_t *y, uint8_t *u, uint8_t *v,
 316                                int r, int g, int b )
 317 {
 318     *y = ( ( (  66 * r + 129 * g +  25 * b + 128 ) >> 8 ) + 16 );
 319     *u =   ( ( -38 * r -  74 * g + 112 * b + 128 ) >> 8 ) + 128 ;
 320     *v =   ( ( 112 * r -  94 * g -  18 * b + 128 ) >> 8 ) + 128 ;
 321 }
 322
 323 static uint8_t *vlc_plane_start( int *pi_pitch,
 324                                  picture_t *p_picture,
 325                                  int i_plane,
 326                                  int i_x_offset, int i_y_offset,
 327                                  const video_format_t *p_fmt,
 328                                  int r )
 329 {
 330     const int i_pitch = p_picture->p[i_plane].i_pitch;
 331     uint8_t *p_pixels = p_picture->p[i_plane].p_pixels;
 332
 333     const int i_dx = ( i_x_offset + p_fmt->i_x_offset ) / r;
 334     const int i_dy = ( i_y_offset + p_fmt->i_y_offset ) / r;
 335
 336     if( pi_pitch )
 337         *pi_pitch = i_pitch;
 338     return &p_pixels[ i_dy * i_pitch + i_dx ];
 339 }
 340
 341 static void vlc_yuv_packed_index( int *pi_y, int *pi_u, int *pi_v, vlc_fourcc_t i_chroma )
 342 {
 343     static const struct {
 344         vlc_fourcc_t chroma;
 345         int y, u ,v;
 346     } p_index[] = {
 347         { FCC_YUY2, 0, 1, 3 },
 348         { FCC_UYVY, 1, 0, 2 },
 349         { FCC_YVYU, 0, 3, 1 },
 350         { 0, 0, 0, 0 }
 351     };
 352     int i;
 353
 354     for( i = 0; p_index[i].chroma != 0; i++ )
 355     {
 356         if( p_index[i].chroma == i_chroma )
 357             break;
 358     }
 359     *pi_y = p_index[i].y;
 360     *pi_u = p_index[i].u;
 361     *pi_v = p_index[i].v;
 362 }
 363
 364 static void vlc_blend_packed( uint8_t *p_dst, const uint8_t *p_src,
 365                               int i_offset0, int i_offset1, int i_offset2,
 366                               int c0, int c1, int c2, int i_alpha,
 367                               bool b_do12 )
 368 {
 369     p_dst[i_offset0] = vlc_blend( c0, p_src[i_offset0], i_alpha );
 370     if( b_do12 )
 371     {
 372         p_dst[i_offset1] = vlc_blend( c1, p_src[i_offset1], i_alpha );
 373         p_dst[i_offset2] = vlc_blend( c2, p_src[i_offset2], i_alpha );
 374     }
 375 }
 376
 377 static void vlc_blend_rgb16( uint16_t *p_dst, const uint16_t *p_src,
 378                              int R, int G, int B, int i_alpha,
 379                              const video_format_t *p_fmt )
 380 {
 381     const int i_pix = *p_src;
 382     const int r = ( i_pix & p_fmt->i_rmask ) >> p_fmt->i_lrshift;
 383     const int g = ( i_pix & p_fmt->i_gmask ) >> p_fmt->i_lgshift;
 384     const int b = ( i_pix & p_fmt->i_bmask ) >> p_fmt->i_lbshift;
 385
 386     *p_dst = ( vlc_blend( R >> p_fmt->i_rrshift, r, i_alpha ) << p_fmt->i_lrshift ) |
 387              ( vlc_blend( G >> p_fmt->i_rgshift, g, i_alpha ) << p_fmt->i_lgshift ) |
 388              ( vlc_blend( B >> p_fmt->i_rbshift, b, i_alpha ) << p_fmt->i_lbshift );
 389 }
 390
 391 static void vlc_rgb_index( int *pi_rindex, int *pi_gindex, int *pi_bindex,
 392                            const video_format_t *p_fmt )
 393 {
 394     if( p_fmt->i_chroma != FCC_RV24 && p_fmt->i_chroma != FCC_RV32 )
 395         return;
 396
 397     /* XXX it will works only if mask are 8 bits aligned */
 398 #ifdef WORDS_BIGENDIAN
 399     const int i_mask_bits = p_fmt->i_chroma == FCC_RV24 ? 24 : 32;
 400     *pi_rindex = ( i_mask_bits - p_fmt->i_lrshift ) / 8;
 401     *pi_gindex = ( i_mask_bits - p_fmt->i_lgshift ) / 8;
 402     *pi_bindex = ( i_mask_bits - p_fmt->i_lbshift ) / 8;
 403 #else
 404     *pi_rindex = p_fmt->i_lrshift / 8;
 405     *pi_gindex = p_fmt->i_lgshift / 8;
 406     *pi_bindex = p_fmt->i_lbshift / 8;
 407 #endif
 408 }
 409
 410 /***********************************************************************
 411  * YUVA
 412  ***********************************************************************/
 413 static void BlendYUVAI420( filter_t *p_filter, picture_t *p_dst,
 414                            picture_t *p_dst_orig, picture_t *p_src,
 415                            int i_x_offset, int i_y_offset,
 416                            int i_width, int i_height, int i_alpha )
 417 {
 418     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
 419     uint8_t *p_src1_y, *p_src2_y, *p_dst_y;
 420     uint8_t *p_src1_u, *p_src2_u, *p_dst_u;
 421     uint8_t *p_src1_v, *p_src2_v, *p_dst_v;
 422     uint8_t *p_trans;
 423     int i_x, i_y, i_trans = 0;
 424     bool b_even_scanline = i_y_offset % 2;
 425
 426     p_dst_y = vlc_plane_start( &i_dst_pitch, p_dst, Y_PLANE,
 427                                i_x_offset, i_y_offset, &p_filter->fmt_out.video, 1 );
 428     p_dst_u = vlc_plane_start( NULL, p_dst, U_PLANE,
 429                                i_x_offset, i_y_offset, &p_filter->fmt_out.video, 2 );
 430     p_dst_v = vlc_plane_start( NULL, p_dst, V_PLANE,
 431                                i_x_offset, i_y_offset, &p_filter->fmt_out.video, 2 );
 432
 433     p_src1_y = vlc_plane_start( &i_src1_pitch, p_dst_orig, Y_PLANE,
 434                                 i_x_offset, i_y_offset, &p_filter->fmt_out.video, 1 );
 435     p_src1_u = vlc_plane_start( NULL, p_dst_orig, U_PLANE,
 436                                 i_x_offset, i_y_offset, &p_filter->fmt_out.video, 2 );
 437     p_src1_v = vlc_plane_start( NULL, p_dst_orig, V_PLANE,
 438                                 i_x_offset, i_y_offset, &p_filter->fmt_out.video, 2 );
 439
 440     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
 441                                 0, 0, &p_filter->fmt_in.video, 1 );
 442     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
 443                                 0, 0, &p_filter->fmt_in.video, 2 );
 444     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
 445                                 0, 0, &p_filter->fmt_in.video, 2 );
 446     p_trans = vlc_plane_start( NULL, p_src, A_PLANE,
 447                                0, 0, &p_filter->fmt_in.video, 1 );
 448
 449     /* Draw until we reach the bottom of the subtitle */
 450     for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src2_pitch,
 451          p_dst_y += i_dst_pitch, p_src1_y += i_src1_pitch,
 452          p_src2_y += i_src2_pitch,
 453          p_dst_u += b_even_scanline ? i_dst_pitch/2 : 0,
 454          p_src1_u += b_even_scanline ? i_src1_pitch/2 : 0,
 455          p_src2_u += i_src2_pitch,
 456          p_dst_v += b_even_scanline ? i_dst_pitch/2 : 0,
 457          p_src1_v += b_even_scanline ? i_src1_pitch/2 : 0,
 458          p_src2_v += i_src2_pitch )
 459     {
 460         b_even_scanline = !b_even_scanline;
 461
 462         /* Draw until we reach the end of the line */
 463         for( i_x = 0; i_x < i_width; i_x++ )
 464         {
 465             if( p_trans )
 466                 i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 467
 468             if( !i_trans )
 469                 continue;
 470
 471             /* Blending */
 472             p_dst_y[i_x] = vlc_blend( p_src2_y[i_x], p_src1_y[i_x], i_trans );
 473             if( b_even_scanline && i_x % 2 == 0 )
 474             {
 475                 p_dst_u[i_x/2] = vlc_blend( p_src2_u[i_x], p_src1_u[i_x/2], i_trans );
 476                 p_dst_v[i_x/2] = vlc_blend( p_src2_v[i_x], p_src1_v[i_x/2], i_trans );
 477             }
 478         }
 479     }
 480 }
 481
 482 static void BlendYUVARV16( filter_t *p_filter, picture_t *p_dst_pic,
 483                            picture_t *p_dst_orig, picture_t *p_src,
 484                            int i_x_offset, int i_y_offset,
 485                            int i_width, int i_height, int i_alpha )
 486 {
 487     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
 488     uint8_t *p_dst, *p_src1, *p_src2_y;
 489     uint8_t *p_src2_u, *p_src2_v;
 490     uint8_t *p_trans;
 491     int i_x, i_y, i_pix_pitch, i_trans = 0;
 492     int r, g, b;
 493
 494     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
 495     i_dst_pitch = p_dst_pic->p->i_pitch;
 496     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 497             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 498             p_dst_pic->p->i_pitch *
 499             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 500
 501     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
 502     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
 503                p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 504                p_dst_orig->p->i_pitch *
 505                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 506
 507     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
 508                                 0, 0, &p_filter->fmt_in.video, 1 );
 509     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
 510                                 0, 0, &p_filter->fmt_in.video, 2 );
 511     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
 512                                 0, 0, &p_filter->fmt_in.video, 2 );
 513     p_trans = vlc_plane_start( NULL, p_src, A_PLANE,
 514                                0, 0, &p_filter->fmt_in.video, 1 );
 515
 516     /* Draw until we reach the bottom of the subtitle */
 517     for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src2_pitch,
 518          p_dst += i_dst_pitch, p_src1 += i_src1_pitch,
 519          p_src2_y += i_src2_pitch, p_src2_u += i_src2_pitch,
 520          p_src2_v += i_src2_pitch )
 521     {
 522         /* Draw until we reach the end of the line */
 523         for( i_x = 0; i_x < i_width; i_x++ )
 524         {
 525             if( p_trans )
 526                 i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 527             if( !i_trans )
 528                 continue;
 529
 530             /* Blending */
 531             yuv_to_rgb( &r, &g, &b,
 532                         p_src2_y[i_x], p_src2_u[i_x], p_src2_v[i_x] );
 533
 534             vlc_blend_rgb16( (uint16_t*)&p_dst[i_x * i_pix_pitch],
 535                              (const uint16_t*)&p_src1[i_x * i_pix_pitch],
 536                              r, g, b, i_trans, &p_filter->fmt_out.video );
 537         }
 538     }
 539 }
 540
 541 static void BlendYUVARV24( filter_t *p_filter, picture_t *p_dst_pic,
 542                            picture_t *p_dst_orig, picture_t *p_src,
 543                            int i_x_offset, int i_y_offset,
 544                            int i_width, int i_height, int i_alpha )
 545 {
 546     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
 547     uint8_t *p_dst, *p_src1, *p_src2_y;
 548     uint8_t *p_src2_u, *p_src2_v;
 549     uint8_t *p_trans;
 550     int i_x, i_y, i_pix_pitch, i_trans = 0;
 551     int r, g, b;
 552
 553     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
 554     i_dst_pitch = p_dst_pic->p->i_pitch;
 555     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 556             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 557             p_dst_pic->p->i_pitch *
 558             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 559
 560     i_src1_pitch = p_dst_orig->p->i_pitch;
 561     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
 562                p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 563                p_dst_orig->p->i_pitch *
 564                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 565
 566     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
 567                                 0, 0, &p_filter->fmt_in.video, 1 );
 568     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
 569                                 0, 0, &p_filter->fmt_in.video, 2 );
 570     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
 571                                 0, 0, &p_filter->fmt_in.video, 2 );
 572     p_trans = vlc_plane_start( NULL, p_src, A_PLANE,
 573                                0, 0, &p_filter->fmt_in.video, 1 );
 574
 575     if( (i_pix_pitch == 4)
 576      && (((((intptr_t)p_dst)|((intptr_t)p_src1)|i_dst_pitch|i_src1_pitch)
 577           & 3) == 0) )
 578     {
 579         /*
 580         ** if picture pixels are 32 bits long and lines addresses are 32 bit
 581         ** aligned, optimize rendering
 582         */
 583         uint32_t *p32_dst = (uint32_t *)p_dst;
 584         uint32_t i32_dst_pitch = (uint32_t)(i_dst_pitch>>2);
 585         uint32_t *p32_src1 = (uint32_t *)p_src1;
 586         uint32_t i32_src1_pitch = (uint32_t)(i_src1_pitch>>2);
 587
 588         int i_rshift, i_gshift, i_bshift;
 589         uint32_t i_rmask, i_gmask, i_bmask;
 590
 591         i_rmask = p_filter->fmt_out.video.i_rmask;
 592         i_gmask = p_filter->fmt_out.video.i_gmask;
 593         i_bmask = p_filter->fmt_out.video.i_bmask;
 594         i_rshift = p_filter->fmt_out.video.i_lrshift;
 595         i_gshift = p_filter->fmt_out.video.i_lgshift;
 596         i_bshift = p_filter->fmt_out.video.i_lbshift;
 597
 598         /* Draw until we reach the bottom of the subtitle */
 599         for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src2_pitch,
 600              p32_dst += i32_dst_pitch, p32_src1 += i32_src1_pitch,
 601              p_src2_y += i_src2_pitch, p_src2_u += i_src2_pitch,
 602              p_src2_v += i_src2_pitch )
 603         {
 604             /* Draw until we reach the end of the line */
 605             for( i_x = 0; i_x < i_width; i_x++ )
 606             {
 607                 if( p_trans )
 608                     i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 609                 if( !i_trans )
 610                     continue;
 611
 612                 if( i_trans == MAX_TRANS )
 613                 {
 614                     /* Completely opaque. Completely overwrite underlying pixel */
 615                     yuv_to_rgb( &r, &g, &b,
 616                                 p_src2_y[i_x], p_src2_u[i_x], p_src2_v[i_x] );
 617
 618                     p32_dst[i_x] = (r<<i_rshift) |
 619                                    (g<<i_gshift) |
 620                                    (b<<i_bshift);
 621                 }
 622                 else
 623                 {
 624                     /* Blending */
 625                     uint32_t i_pix_src1 = p32_src1[i_x];
 626                     yuv_to_rgb( &r, &g, &b,
 627                                 p_src2_y[i_x], p_src2_u[i_x], p_src2_v[i_x] );
 628
 629                     p32_dst[i_x] = ( vlc_blend( r, (i_pix_src1 & i_rmask)>>i_rshift, i_trans ) << i_rshift ) |
 630                                    ( vlc_blend( g, (i_pix_src1 & i_gmask)>>i_gshift, i_trans ) << i_gshift ) |
 631                                    ( vlc_blend( b, (i_pix_src1 & i_bmask)>>i_bshift, i_trans ) << i_bshift );
 632                 }
 633             }
 634         }
 635     }
 636     else
 637     {
 638         int i_rindex, i_gindex, i_bindex;
 639         uint32_t i_rmask, i_gmask, i_bmask;
 640
 641         i_rmask = p_filter->fmt_out.video.i_rmask;
 642         i_gmask = p_filter->fmt_out.video.i_gmask;
 643         i_bmask = p_filter->fmt_out.video.i_bmask;
 644
 645         vlc_rgb_index( &i_rindex, &i_gindex, &i_bindex, &p_filter->fmt_out.video );
 646
 647         /* Draw until we reach the bottom of the subtitle */
 648         for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src2_pitch,
 649              p_dst += i_dst_pitch, p_src1 += i_src1_pitch,
 650              p_src2_y += i_src2_pitch, p_src2_u += i_src2_pitch,
 651              p_src2_v += i_src2_pitch )
 652         {
 653             /* Draw until we reach the end of the line */
 654             for( i_x = 0; i_x < i_width; i_x++ )
 655             {
 656                 if( p_trans )
 657                     i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 658                 if( !i_trans )
 659                     continue;
 660
 661                 /* Blending */
 662                 yuv_to_rgb( &r, &g, &b,
 663                             p_src2_y[i_x], p_src2_u[i_x], p_src2_v[i_x] );
 664
 665                 vlc_blend_packed( &p_dst[ i_x * i_pix_pitch],
 666                                   &p_src1[i_x * i_pix_pitch],
 667                                   i_rindex, i_gindex, i_bindex,
 668                                   r, g, b, i_alpha, true );
 669             }
 670         }
 671     }
 672 }
 673
 674 static void BlendYUVAYUVPacked( filter_t *p_filter, picture_t *p_dst_pic,
 675                                 picture_t *p_dst_orig, picture_t *p_src,
 676                                 int i_x_offset, int i_y_offset,
 677                                 int i_width, int i_height, int i_alpha )
 678 {
 679     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
 680     uint8_t *p_dst, *p_src1, *p_src2_y;
 681     uint8_t *p_src2_u, *p_src2_v;
 682     uint8_t *p_trans;
 683     int i_x, i_y, i_pix_pitch, i_trans = 0;
 684     bool b_even = !((i_x_offset + p_filter->fmt_out.video.i_x_offset)%2);
 685     int i_l_offset, i_u_offset, i_v_offset;
 686
 687     vlc_yuv_packed_index( &i_l_offset, &i_u_offset, &i_v_offset,
 688                           p_filter->fmt_out.video.i_chroma );
 689
 690     i_pix_pitch = 2;
 691     i_dst_pitch = p_dst_pic->p->i_pitch;
 692     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 693             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 694             p_dst_pic->p->i_pitch *
 695             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 696
 697     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
 698     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
 699                p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 700                p_dst_orig->p->i_pitch *
 701                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 702
 703     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
 704                                 0, 0, &p_filter->fmt_in.video, 1 );
 705     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
 706                                 0, 0, &p_filter->fmt_in.video, 2 );
 707     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
 708                                 0, 0, &p_filter->fmt_in.video, 2 );
 709     p_trans = vlc_plane_start( NULL, p_src, A_PLANE,
 710                                0, 0, &p_filter->fmt_in.video, 1 );
 711
 712     i_width &= ~1; /* Needs to be a multiple of 2 */
 713
 714     /* Draw until we reach the bottom of the subtitle */
 715     for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src2_pitch,
 716          p_dst += i_dst_pitch, p_src1 += i_src1_pitch,
 717          p_src2_y += i_src2_pitch, p_src2_u += i_src2_pitch,
 718          p_src2_v += i_src2_pitch )
 719     {
 720         /* Draw until we reach the end of the line */
 721         for( i_x = 0; i_x < i_width; i_x++, b_even = !b_even )
 722         {
 723             i_trans = vlc_alpha( p_trans[i_x], i_alpha );
 724             if( !i_trans )
 725                 continue;
 726
 727             /* Blending */
 728             if( b_even )
 729             {
 730                 int i_u;
 731                 int i_v;
 732                 /* FIXME what's with 0xaa ? */
 733                 if( p_trans[i_x+1] > 0xaa )
 734                 {
 735                     i_u = (p_src2_u[i_x]+p_src2_u[i_x+1])>>1;
 736                     i_v = (p_src2_v[i_x]+p_src2_v[i_x+1])>>1;
 737                 }
 738                 else
 739                 {
 740                     i_u = p_src2_u[i_x];
 741                     i_v = p_src2_v[i_x];
 742                 }
 743
 744                 vlc_blend_packed( &p_dst[i_x * 2], &p_src1[i_x * 2],
 745                                   i_l_offset, i_u_offset, i_v_offset,
 746                                   p_src2_y[i_x], i_u, i_v, i_trans, true );
 747             }
 748             else
 749             {
 750                 p_dst[i_x * 2 + i_l_offset] = vlc_blend( p_src2_y[i_x], p_src1[i_x * 2 + i_l_offset], i_trans );
 751             }
 752         }
 753     }
 754 }
 755 /***********************************************************************
 756  * I420, YV12
 757  ***********************************************************************/
 758 static void BlendI420I420( filter_t *p_filter, picture_t *p_dst,
 759                            picture_t *p_dst_orig, picture_t *p_src,
 760                            int i_x_offset, int i_y_offset,
 761                            int i_width, int i_height, int i_alpha )
 762 {
 763     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
 764     uint8_t *p_src1_y, *p_src2_y, *p_dst_y;
 765     uint8_t *p_src1_u, *p_src2_u, *p_dst_u;
 766     uint8_t *p_src1_v, *p_src2_v, *p_dst_v;
 767     int i_x, i_y;
 768     bool b_even_scanline = i_y_offset % 2;
 769
 770     if( i_alpha == 0xff )
 771     {
 772         BlendI420I420_no_alpha( p_filter, p_dst, p_dst_orig, p_src,
 773                                 i_x_offset, i_y_offset, i_width, i_height );
 774         return;
 775     }
 776
 777
 778     i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
 779     p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
 780               p_filter->fmt_out.video.i_x_offset +
 781               p_dst->p[Y_PLANE].i_pitch *
 782               ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 783     p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
 784               p_filter->fmt_out.video.i_x_offset/2 +
 785               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 786               p_dst->p[U_PLANE].i_pitch;
 787     p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
 788               p_filter->fmt_out.video.i_x_offset/2 +
 789               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 790               p_dst->p[V_PLANE].i_pitch;
 791
 792     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
 793     p_src1_y = p_dst_orig->p[Y_PLANE].p_pixels + i_x_offset +
 794                p_filter->fmt_out.video.i_x_offset +
 795                p_dst_orig->p[Y_PLANE].i_pitch *
 796                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 797     p_src1_u = p_dst_orig->p[U_PLANE].p_pixels + i_x_offset/2 +
 798                p_filter->fmt_out.video.i_x_offset/2 +
 799                ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 800                p_dst_orig->p[U_PLANE].i_pitch;
 801     p_src1_v = p_dst_orig->p[V_PLANE].p_pixels + i_x_offset/2 +
 802                p_filter->fmt_out.video.i_x_offset/2 +
 803                ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 804                p_dst_orig->p[V_PLANE].i_pitch;
 805
 806     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
 807                                 0, 0, &p_filter->fmt_in.video, 1 );
 808     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
 809                                 0, 0, &p_filter->fmt_in.video, 2 );
 810     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
 811                                 0, 0, &p_filter->fmt_in.video, 2 );
 812     i_width &= ~1;
 813
 814     /* Draw until we reach the bottom of the subtitle */
 815     for( i_y = 0; i_y < i_height; i_y++,
 816          p_dst_y += i_dst_pitch, p_src1_y += i_src1_pitch,
 817          p_src2_y += i_src2_pitch )
 818     {
 819         if( b_even_scanline )
 820         {
 821             p_dst_u  += i_dst_pitch/2;
 822             p_dst_v  += i_dst_pitch/2;
 823             p_src1_u += i_src1_pitch/2;
 824             p_src1_v += i_src1_pitch/2;
 825         }
 826         b_even_scanline = !b_even_scanline;
 827
 828         /* Draw until we reach the end of the line */
 829         for( i_x = 0; i_x < i_width; i_x++ )
 830         {
 831             if( !i_alpha )
 832                 continue;
 833
 834             /* Blending */
 835             p_dst_y[i_x] = vlc_blend( p_src2_y[i_x], p_src1_y[i_x], i_alpha );
 836             if( b_even_scanline && i_x % 2 == 0 )
 837             {
 838                 p_dst_u[i_x/2] = vlc_blend( p_src2_u[i_x/2], p_src1_u[i_x/2], i_alpha );
 839                 p_dst_v[i_x/2] = vlc_blend( p_src2_v[i_x/2], p_src1_v[i_x/2], i_alpha );
 840             }
 841         }
 842         if( i_y%2 == 1 )
 843         {
 844             p_src2_u += i_src2_pitch/2;
 845             p_src2_v += i_src2_pitch/2;
 846         }
 847     }
 848 }
 849 static void BlendI420I420_no_alpha( filter_t *p_filter, picture_t *p_dst,
 850                                     picture_t *p_dst_orig, picture_t *p_src,
 851                                     int i_x_offset, int i_y_offset,
 852                                     int i_width, int i_height )
 853 {
 854     VLC_UNUSED(p_dst_orig);
 855     int i_src2_pitch, i_dst_pitch;
 856     uint8_t *p_src2_y, *p_dst_y;
 857     uint8_t *p_src2_u, *p_dst_u;
 858     uint8_t *p_src2_v, *p_dst_v;
 859     int i_y;
 860     bool b_even_scanline = i_y_offset % 2;
 861
 862     i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
 863     p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
 864               p_filter->fmt_out.video.i_x_offset +
 865               p_dst->p[Y_PLANE].i_pitch *
 866               ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 867     p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
 868               p_filter->fmt_out.video.i_x_offset/2 +
 869               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 870               p_dst->p[U_PLANE].i_pitch;
 871     p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
 872               p_filter->fmt_out.video.i_x_offset/2 +
 873               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
 874               p_dst->p[V_PLANE].i_pitch;
 875
 876     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
 877                                 0, 0, &p_filter->fmt_in.video, 1 );
 878     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
 879                                 0, 0, &p_filter->fmt_in.video, 2 );
 880     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
 881                                 0, 0, &p_filter->fmt_in.video, 2 );
 882
 883     i_width &= ~1;
 884
 885     /* Draw until we reach the bottom of the subtitle */
 886     for( i_y = 0; i_y < i_height;
 887             i_y++, p_dst_y += i_dst_pitch, p_src2_y += i_src2_pitch )
 888     {
 889         /* Completely opaque. Completely overwrite underlying pixel */
 890         vlc_memcpy( p_dst_y, p_src2_y, i_width );
 891         if( b_even_scanline )
 892         {
 893             p_dst_u  += i_dst_pitch/2;
 894             p_dst_v  += i_dst_pitch/2;
 895         }
 896         else
 897         {
 898             vlc_memcpy( p_dst_u, p_src2_u, i_width/2 );
 899             vlc_memcpy( p_dst_v, p_src2_v, i_width/2 );
 900         }
 901         b_even_scanline = !b_even_scanline;
 902         if( i_y%2 == 1 )
 903         {
 904             p_src2_u += i_src2_pitch/2;
 905             p_src2_v += i_src2_pitch/2;
 906         }
 907     }
 908 }
 909
 910 static void BlendI420R16( filter_t *p_filter, picture_t *p_dst_pic,
 911                           picture_t *p_dst_orig, 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_src1_pitch, i_src2_pitch, i_dst_pitch;
 916     uint8_t *p_dst, *p_src1, *p_src2_y;
 917     uint8_t *p_src2_u, *p_src2_v;
 918     int i_x, i_y, i_pix_pitch;
 919     int r, g, b;
 920
 921     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
 922     i_dst_pitch = p_dst_pic->p->i_pitch;
 923     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 924             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 925             p_dst_pic->p->i_pitch *
 926             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 927
 928     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
 929     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
 930                p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 931                p_dst_orig->p->i_pitch *
 932                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 933
 934     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
 935                                 0, 0, &p_filter->fmt_in.video, 1 );
 936     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
 937                                 0, 0, &p_filter->fmt_in.video, 2 );
 938     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
 939                                 0, 0, &p_filter->fmt_in.video, 2 );
 940
 941     /* Draw until we reach the bottom of the subtitle */
 942     for( i_y = 0; i_y < i_height; i_y++,
 943          p_dst += i_dst_pitch, p_src1 += i_src1_pitch,
 944          p_src2_y += i_src2_pitch )
 945     {
 946         /* Draw until we reach the end of the line */
 947         for( i_x = 0; i_x < i_width; i_x++ )
 948         {
 949             /* Blending */
 950             yuv_to_rgb( &r, &g, &b,
 951                         p_src2_y[i_x], p_src2_u[i_x/2], p_src2_v[i_x/2] );
 952
 953             vlc_blend_rgb16( (uint16_t*)&p_dst[i_x * i_pix_pitch],
 954                              (const uint16_t*)&p_src1[i_x * i_pix_pitch],
 955                              r, g, b, i_alpha, &p_filter->fmt_out.video );
 956         }
 957         if( i_y%2 == 1 )
 958         {
 959             p_src2_u += i_src2_pitch/2;
 960             p_src2_v += i_src2_pitch/2;
 961         }
 962     }
 963 }
 964
 965 static void BlendI420R24( filter_t *p_filter, picture_t *p_dst_pic,
 966                           picture_t *p_dst_orig, 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_src1_pitch, i_src2_pitch, i_dst_pitch;
 971     uint8_t *p_dst, *p_src1, *p_src2_y;
 972     uint8_t *p_src2_u, *p_src2_v;
 973     int i_x, i_y, i_pix_pitch;
 974     int i_rindex, i_gindex, i_bindex;
 975     int r, g, b;
 976
 977     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
 978     i_dst_pitch = p_dst_pic->p->i_pitch;
 979     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
 980             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 981             p_dst_pic->p->i_pitch *
 982             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 983
 984     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
 985     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
 986                p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
 987                p_dst_orig->p->i_pitch *
 988                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
 989
 990     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
 991                                 0, 0, &p_filter->fmt_in.video, 1 );
 992     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
 993                                 0, 0, &p_filter->fmt_in.video, 2 );
 994     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
 995                                 0, 0, &p_filter->fmt_in.video, 2 );
 996
 997     vlc_rgb_index( &i_rindex, &i_gindex, &i_bindex, &p_filter->fmt_out.video );
 998
 999     /* Draw until we reach the bottom of the subtitle */
1000     for( i_y = 0; i_y < i_height; i_y++,
1001          p_dst += i_dst_pitch, p_src1 += i_src1_pitch,
1002          p_src2_y += i_src2_pitch, p_src2_u += i_src2_pitch,
1003          p_src2_v += i_src2_pitch )
1004     {
1005         /* Draw until we reach the end of the line */
1006         for( i_x = 0; i_x < i_width; i_x++ )
1007         {
1008             if( !i_alpha )
1009                 continue;
1010
1011             /* Blending */
1012             yuv_to_rgb( &r, &g, &b,
1013                         p_src2_y[i_x], p_src2_u[i_x/2], p_src2_v[i_x/2] );
1014
1015             vlc_blend_packed( &p_dst[i_x * i_pix_pitch], &p_src1[i_x * i_pix_pitch],
1016                               i_rindex, i_gindex, i_bindex, r, g, b, i_alpha, true );
1017         }
1018         if( i_y%2 == 1 )
1019         {
1020             p_src2_u += i_src2_pitch/2;
1021             p_src2_v += i_src2_pitch/2;
1022         }
1023     }
1024 }
1025
1026 static void BlendI420YUVPacked( filter_t *p_filter, picture_t *p_dst_pic,
1027                                 picture_t *p_dst_orig, picture_t *p_src,
1028                                 int i_x_offset, int i_y_offset,
1029                                 int i_width, int i_height, int i_alpha )
1030 {
1031     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
1032     uint8_t *p_dst, *p_src1, *p_src2_y;
1033     uint8_t *p_src2_u, *p_src2_v;
1034     int i_x, i_y, i_pix_pitch;
1035     bool b_even = !((i_x_offset + p_filter->fmt_out.video.i_x_offset)%2);
1036     int i_l_offset, i_u_offset, i_v_offset;
1037
1038     vlc_yuv_packed_index( &i_l_offset, &i_u_offset, &i_v_offset,
1039                           p_filter->fmt_out.video.i_chroma );
1040
1041     i_pix_pitch = 2;
1042     i_dst_pitch = p_dst_pic->p->i_pitch;
1043     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
1044             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1045             p_dst_pic->p->i_pitch *
1046             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1047
1048     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
1049     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
1050                p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1051                p_dst_orig->p->i_pitch *
1052                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1053
1054     p_src2_y = vlc_plane_start( &i_src2_pitch, p_src, Y_PLANE,
1055                                 0, 0, &p_filter->fmt_in.video, 1 );
1056     p_src2_u = vlc_plane_start( NULL, p_src, U_PLANE,
1057                                 0, 0, &p_filter->fmt_in.video, 2 );
1058     p_src2_v = vlc_plane_start( NULL, p_src, V_PLANE,
1059                                 0, 0, &p_filter->fmt_in.video, 2 );
1060
1061     i_width &= ~1; /* Needs to be a multiple of 2 */
1062
1063     /* Draw until we reach the bottom of the subtitle */
1064     for( i_y = 0; i_y < i_height; i_y++,
1065          p_dst += i_dst_pitch, p_src1 += i_src1_pitch,
1066          p_src2_y += i_src2_pitch, p_src2_u += i_src2_pitch,
1067          p_src2_v += i_src2_pitch )
1068     {
1069         /* Draw until we reach the end of the line */
1070         for( i_x = 0; i_x < i_width; i_x++, b_even = !b_even )
1071         {
1072             if( !i_alpha )
1073                 continue;
1074
1075             /* Blending */
1076             vlc_blend_packed( &p_dst[i_x * 2], &p_src1[i_x * 2],
1077                               i_l_offset, i_u_offset, i_v_offset,
1078                               p_src2_y[i_x], p_src2_u[i_x/2], p_src2_v[i_x/2], i_alpha, b_even );
1079         }
1080         if( i_y%2 == 1 )
1081         {
1082             p_src2_u += i_src2_pitch/2;
1083             p_src2_v += i_src2_pitch/2;
1084         }
1085     }
1086 }
1087
1088 /***********************************************************************
1089  * YUVP
1090  ***********************************************************************/
1091 static void BlendPalI420( filter_t *p_filter, picture_t *p_dst,
1092                           picture_t *p_dst_orig, picture_t *p_src,
1093                           int i_x_offset, int i_y_offset,
1094                           int i_width, int i_height, int i_alpha )
1095 {
1096     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
1097     uint8_t *p_src1_y, *p_src2, *p_dst_y;
1098     uint8_t *p_src1_u, *p_dst_u;
1099     uint8_t *p_src1_v, *p_dst_v;
1100     int i_x, i_y, i_trans;
1101     bool b_even_scanline = i_y_offset % 2;
1102
1103     i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
1104     p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
1105               p_filter->fmt_out.video.i_x_offset +
1106               p_dst->p[Y_PLANE].i_pitch *
1107               ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1108     p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
1109               p_filter->fmt_out.video.i_x_offset/2 +
1110               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1111               p_dst->p[U_PLANE].i_pitch;
1112     p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
1113               p_filter->fmt_out.video.i_x_offset/2 +
1114               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1115               p_dst->p[V_PLANE].i_pitch;
1116
1117     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
1118     p_src1_y = p_dst_orig->p[Y_PLANE].p_pixels + i_x_offset +
1119                p_filter->fmt_out.video.i_x_offset +
1120                p_dst_orig->p[Y_PLANE].i_pitch *
1121                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1122     p_src1_u = p_dst_orig->p[U_PLANE].p_pixels + i_x_offset/2 +
1123                p_filter->fmt_out.video.i_x_offset/2 +
1124                ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1125                p_dst_orig->p[U_PLANE].i_pitch;
1126     p_src1_v = p_dst_orig->p[V_PLANE].p_pixels + i_x_offset/2 +
1127                p_filter->fmt_out.video.i_x_offset/2 +
1128                ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1129                p_dst_orig->p[V_PLANE].i_pitch;
1130
1131     i_src2_pitch = p_src->p->i_pitch;
1132     p_src2 = p_src->p->p_pixels + p_filter->fmt_in.video.i_x_offset +
1133              i_src2_pitch * p_filter->fmt_in.video.i_y_offset;
1134
1135 #define p_pal p_filter->fmt_in.video.p_palette->palette
1136
1137     /* Draw until we reach the bottom of the subtitle */
1138     for( i_y = 0; i_y < i_height; i_y++,
1139          p_dst_y += i_dst_pitch, p_src1_y += i_src1_pitch,
1140          p_src2 += i_src2_pitch,
1141          p_dst_u += b_even_scanline ? i_dst_pitch/2 : 0,
1142          p_src1_u += b_even_scanline ? i_src1_pitch/2 : 0,
1143          p_dst_v += b_even_scanline ? i_dst_pitch/2 : 0,
1144          p_src1_v += b_even_scanline ? i_src1_pitch/2 : 0 )
1145     {
1146         const uint8_t *p_trans = p_src2;
1147         b_even_scanline = !b_even_scanline;
1148
1149         /* Draw until we reach the end of the line */
1150         for( i_x = 0; i_x < i_width; i_x++ )
1151         {
1152             i_trans = vlc_alpha( p_pal[p_trans[i_x]][3], i_alpha );
1153             if( !i_trans )
1154                 continue;
1155
1156             /* Blending */
1157             p_dst_y[i_x] = vlc_blend( p_pal[p_src2[i_x]][0], p_src1_y[i_x], i_trans );
1158             if( b_even_scanline && ((i_x % 2) == 0) )
1159             {
1160                 p_dst_u[i_x/2] = vlc_blend( p_pal[p_src2[i_x]][1], p_src1_u[i_x/2], i_trans );
1161                 p_dst_v[i_x/2] = vlc_blend( p_pal[p_src2[i_x]][2], p_src1_v[i_x/2], i_trans );
1162             }
1163         }
1164     }
1165 #undef p_pal
1166 }
1167
1168 static void BlendPalYUVPacked( filter_t *p_filter, picture_t *p_dst_pic,
1169                                picture_t *p_dst_orig, picture_t *p_src,
1170                                int i_x_offset, int i_y_offset,
1171                                int i_width, int i_height, int i_alpha )
1172 {
1173     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
1174     uint8_t *p_src1, *p_src2, *p_dst;
1175     int i_x, i_y, i_pix_pitch, i_trans;
1176     bool b_even = !((i_x_offset + p_filter->fmt_out.video.i_x_offset)%2);
1177     int i_l_offset, i_u_offset, i_v_offset;
1178
1179     vlc_yuv_packed_index( &i_l_offset, &i_u_offset, &i_v_offset,
1180                           p_filter->fmt_out.video.i_chroma );
1181
1182     i_pix_pitch = 2;
1183     i_dst_pitch = p_dst_pic->p->i_pitch;
1184     p_dst = p_dst_pic->p->p_pixels + i_pix_pitch * (i_x_offset +
1185             p_filter->fmt_out.video.i_x_offset) + p_dst_pic->p->i_pitch *
1186             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1187
1188     i_src1_pitch = p_dst_orig->p->i_pitch;
1189     p_src1 = p_dst_orig->p->p_pixels + i_pix_pitch * (i_x_offset +
1190              p_filter->fmt_out.video.i_x_offset) + p_dst_orig->p->i_pitch *
1191              ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1192
1193     i_src2_pitch = p_src->p->i_pitch;
1194     p_src2 = p_src->p->p_pixels + p_filter->fmt_in.video.i_x_offset +
1195              i_src2_pitch * p_filter->fmt_in.video.i_y_offset;
1196
1197     i_width &= ~1; /* Needs to be a multiple of 2 */
1198
1199 #define p_pal p_filter->fmt_in.video.p_palette->palette
1200
1201     /* Draw until we reach the bottom of the subtitle */
1202     for( i_y = 0; i_y < i_height; i_y++,
1203          p_dst += i_dst_pitch, p_src1 += i_src1_pitch, p_src2 += i_src2_pitch )
1204     {
1205         const uint8_t *p_trans = p_src2;
1206         /* Draw until we reach the end of the line */
1207         for( i_x = 0; i_x < i_width; i_x++, b_even = !b_even )
1208         {
1209             i_trans = vlc_alpha( p_pal[p_trans[i_x]][3], i_alpha );
1210             if( !i_trans )
1211                 continue;
1212
1213             /* Blending */
1214             if( b_even )
1215             {
1216                 uint16_t i_u;
1217                 uint16_t i_v;
1218                 if( p_trans[i_x+1] > 0xaa )
1219                 {
1220                     i_u = (p_pal[p_src2[i_x]][1] + p_pal[p_src2[i_x+1]][1]) >> 1;
1221                     i_v = (p_pal[p_src2[i_x]][2] + p_pal[p_src2[i_x+1]][2]) >> 1;
1222                 }
1223                 else
1224                 {
1225                     i_u = p_pal[p_src2[i_x]][1];
1226                     i_v = p_pal[p_src2[i_x]][2];
1227                 }
1228
1229                 vlc_blend_packed( &p_dst[i_x * 2], &p_src1[i_x * 2],
1230                                   i_l_offset, i_u_offset, i_v_offset,
1231                                   p_pal[p_src2[i_x]][0], i_u, i_v, i_trans, true );
1232             }
1233             else
1234             {
1235                 p_dst[i_x * 2 + i_l_offset] = vlc_blend( p_pal[p_src2[i_x]][0], p_src1[i_x * 2 + i_l_offset], i_trans );
1236             }
1237         }
1238     }
1239 #undef p_pal
1240 }
1241
1242 static void BlendPalRV( filter_t *p_filter, picture_t *p_dst_pic,
1243                         picture_t *p_dst_orig, picture_t *p_src,
1244                         int i_x_offset, int i_y_offset,
1245                         int i_width, int i_height, int i_alpha )
1246 {
1247     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
1248     uint8_t *p_src1, *p_src2, *p_dst;
1249     int i_x, i_y, i_pix_pitch, i_trans;
1250     int r, g, b;
1251     video_palette_t rgbpalette;
1252     int i_rindex, i_gindex, i_bindex;
1253
1254     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
1255     i_dst_pitch = p_dst_pic->p->i_pitch;
1256     p_dst = p_dst_pic->p->p_pixels + i_pix_pitch * (i_x_offset +
1257             p_filter->fmt_out.video.i_x_offset) + p_dst_pic->p->i_pitch *
1258             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1259
1260     i_src1_pitch = p_dst_orig->p->i_pitch;
1261     p_src1 = p_dst_orig->p->p_pixels + i_pix_pitch * (i_x_offset +
1262              p_filter->fmt_out.video.i_x_offset) + p_dst_orig->p->i_pitch *
1263              ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1264
1265     i_src2_pitch = p_src->p->i_pitch;
1266     p_src2 = p_src->p->p_pixels + p_filter->fmt_in.video.i_x_offset +
1267              i_src2_pitch * p_filter->fmt_in.video.i_y_offset;
1268
1269 #define p_pal p_filter->fmt_in.video.p_palette->palette
1270 #define rgbpal rgbpalette.palette
1271
1272     /* Convert palette first */
1273     for( i_y = 0; i_y < p_filter->fmt_in.video.p_palette->i_entries && i_y < 256; i_y++ )
1274     {
1275         yuv_to_rgb( &r, &g, &b, p_pal[i_y][0], p_pal[i_y][1], p_pal[i_y][2] );
1276         rgbpal[i_y][0] = r; rgbpal[i_y][1] = g; rgbpal[i_y][2] = b;
1277     }
1278
1279     /* */
1280     vlc_rgb_index( &i_rindex, &i_gindex, &i_bindex, &p_filter->fmt_out.video );
1281
1282     /* Draw until we reach the bottom of the subtitle */
1283     for( i_y = 0; i_y < i_height; i_y++,
1284          p_dst += i_dst_pitch, p_src1 += i_src1_pitch, p_src2 += i_src2_pitch )
1285     {
1286         const uint8_t *p_trans = p_src2;
1287         /* Draw until we reach the end of the line */
1288         for( i_x = 0; i_x < i_width; i_x++ )
1289         {
1290             i_trans = vlc_alpha( p_pal[p_trans[i_x]][3], i_alpha );
1291             if( !i_trans )
1292                 continue;
1293
1294             /* Blending */
1295             if( p_filter->fmt_out.video.i_chroma == FCC_RV15 || p_filter->fmt_out.video.i_chroma == FCC_RV16 )
1296                 vlc_blend_rgb16( (uint16_t*)&p_dst[i_x * i_pix_pitch],
1297                                  (const uint16_t*)&p_src1[i_x * i_pix_pitch],
1298                                   rgbpal[p_src2[i_x]][0], rgbpal[p_src2[i_x]][1], rgbpal[p_src2[i_x]][3],
1299                                   i_trans,
1300                                   &p_filter->fmt_out.video );
1301             else
1302                 vlc_blend_packed( &p_dst[i_x * i_pix_pitch], &p_src1[i_x * i_pix_pitch],
1303                                   i_rindex, i_gindex, i_bindex,
1304                                   rgbpal[p_src2[i_x]][0], rgbpal[p_src2[i_x]][1], rgbpal[p_src2[i_x]][3],
1305                                   i_trans, true );
1306         }
1307     }
1308
1309 #undef p_pal
1310 #undef rgbpal
1311 }
1312
1313 /***********************************************************************
1314  * RGBA
1315  ***********************************************************************/
1316 static void BlendRGBAI420( filter_t *p_filter, picture_t *p_dst,
1317                            picture_t *p_dst_orig, picture_t *p_src,
1318                            int i_x_offset, int i_y_offset,
1319                            int i_width, int i_height, int i_alpha )
1320 {
1321     int i_src1_pitch, i_src2_pitch, i_dst_pitch, i_src_pix_pitch;
1322     uint8_t *p_src1_y, *p_dst_y;
1323     uint8_t *p_src1_u, *p_dst_u;
1324     uint8_t *p_src1_v, *p_dst_v;
1325     uint8_t *p_src2;
1326     int i_x, i_y, i_trans;
1327     uint8_t y, u, v;
1328
1329     bool b_even_scanline = i_y_offset % 2;
1330
1331     i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
1332     p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
1333               p_filter->fmt_out.video.i_x_offset +
1334               p_dst->p[Y_PLANE].i_pitch *
1335               ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1336     p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
1337               p_filter->fmt_out.video.i_x_offset/2 +
1338               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1339               p_dst->p[U_PLANE].i_pitch;
1340     p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
1341               p_filter->fmt_out.video.i_x_offset/2 +
1342               ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1343               p_dst->p[V_PLANE].i_pitch;
1344
1345     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
1346     p_src1_y = p_dst_orig->p[Y_PLANE].p_pixels + i_x_offset +
1347                p_filter->fmt_out.video.i_x_offset +
1348                p_dst_orig->p[Y_PLANE].i_pitch *
1349                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1350     p_src1_u = p_dst_orig->p[U_PLANE].p_pixels + i_x_offset/2 +
1351                p_filter->fmt_out.video.i_x_offset/2 +
1352                ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1353                p_dst_orig->p[U_PLANE].i_pitch;
1354     p_src1_v = p_dst_orig->p[V_PLANE].p_pixels + i_x_offset/2 +
1355                p_filter->fmt_out.video.i_x_offset/2 +
1356                ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
1357                p_dst_orig->p[V_PLANE].i_pitch;
1358
1359     i_src_pix_pitch = p_src->p->i_pixel_pitch;
1360     i_src2_pitch = p_src->p->i_pitch;
1361     p_src2 = p_src->p->p_pixels +
1362              p_filter->fmt_in.video.i_x_offset * i_src2_pitch +
1363              p_src->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
1364
1365
1366     /* Draw until we reach the bottom of the subtitle */
1367     for( i_y = 0; i_y < i_height; i_y++,
1368          p_dst_y += i_dst_pitch, p_src1_y += i_src1_pitch,
1369          p_dst_u += b_even_scanline ? i_dst_pitch/2 : 0,
1370          p_src1_u += b_even_scanline ? i_src1_pitch/2 : 0,
1371          p_dst_v += b_even_scanline ? i_dst_pitch/2 : 0,
1372          p_src1_v += b_even_scanline ? i_src1_pitch/2 : 0,
1373          p_src2 += i_src2_pitch )
1374     {
1375         b_even_scanline = !b_even_scanline;
1376
1377         /* Draw until we reach the end of the line */
1378         for( i_x = 0; i_x < i_width; i_x++ )
1379         {
1380             const int R = p_src2[i_x * i_src_pix_pitch + 0];
1381             const int G = p_src2[i_x * i_src_pix_pitch + 1];
1382             const int B = p_src2[i_x * i_src_pix_pitch + 2];
1383
1384             i_trans = vlc_alpha( p_src2[i_x * i_src_pix_pitch + 3], i_alpha );
1385             if( !i_trans )
1386                 continue;
1387
1388             /* Blending */
1389             rgb_to_yuv( &y, &u, &v, R, G, B );
1390
1391             p_dst_y[i_x] = vlc_blend( y, p_src1_y[i_x], i_trans );
1392             if( b_even_scanline && i_x % 2 == 0 )
1393             {
1394                 p_dst_u[i_x/2] = vlc_blend( u, p_src1_u[i_x/2], i_trans );
1395                 p_dst_v[i_x/2] = vlc_blend( v, p_src1_v[i_x/2], i_trans );
1396             }
1397         }
1398     }
1399 }
1400
1401 static void BlendRGBAR24( filter_t *p_filter, picture_t *p_dst_pic,
1402                           picture_t *p_dst_orig, picture_t *p_src,
1403                           int i_x_offset, int i_y_offset,
1404                           int i_width, int i_height, int i_alpha )
1405 {
1406     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
1407     uint8_t *p_dst, *p_src1, *p_src2;
1408     int i_x, i_y, i_pix_pitch, i_trans, i_src_pix_pitch;
1409     int i_rindex, i_gindex, i_bindex;
1410
1411     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
1412     i_dst_pitch = p_dst_pic->p->i_pitch;
1413     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
1414             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1415             p_dst_pic->p->i_pitch *
1416             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1417
1418     i_src1_pitch = p_dst_orig->p->i_pitch;
1419     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
1420              p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1421              p_dst_orig->p->i_pitch *
1422              ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1423
1424     i_src_pix_pitch = p_src->p->i_pixel_pitch;
1425     i_src2_pitch = p_src->p->i_pitch;
1426     p_src2 = p_src->p->p_pixels +
1427              p_filter->fmt_in.video.i_x_offset * i_pix_pitch +
1428              p_src->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
1429
1430     vlc_rgb_index( &i_rindex, &i_gindex, &i_bindex, &p_filter->fmt_out.video );
1431
1432     /* Draw until we reach the bottom of the subtitle */
1433     for( i_y = 0; i_y < i_height; i_y++,
1434          p_dst += i_dst_pitch, p_src1 += i_src1_pitch, p_src2 += i_src2_pitch )
1435     {
1436         /* Draw until we reach the end of the line */
1437         for( i_x = 0; i_x < i_width; i_x++ )
1438         {
1439             const int R = p_src2[i_x * i_src_pix_pitch + 0];
1440             const int G = p_src2[i_x * i_src_pix_pitch + 1];
1441             const int B = p_src2[i_x * i_src_pix_pitch + 2];
1442
1443             i_trans = vlc_alpha( p_src2[i_x * i_src_pix_pitch + 3], i_alpha );
1444             if( !i_trans )
1445                 continue;
1446
1447             /* Blending */
1448             vlc_blend_packed( &p_dst[i_x * i_pix_pitch], &p_src1[i_x * i_pix_pitch],
1449                               i_rindex, i_gindex, i_bindex,
1450                               R, G, B, i_trans, true );
1451         }
1452     }
1453 }
1454
1455 static void BlendRGBAR16( filter_t *p_filter, picture_t *p_dst_pic,
1456                           picture_t *p_dst_orig, picture_t *p_src,
1457                           int i_x_offset, int i_y_offset,
1458                           int i_width, int i_height, int i_alpha )
1459 {
1460     int i_src1_pitch, i_src2_pitch, i_dst_pitch;
1461     uint8_t *p_dst, *p_src1, *p_src2;
1462     int i_x, i_y, i_pix_pitch, i_trans, i_src_pix_pitch;
1463
1464     i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
1465     i_dst_pitch = p_dst_pic->p->i_pitch;
1466     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
1467             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1468             p_dst_pic->p->i_pitch *
1469             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1470
1471     i_src1_pitch = p_dst_orig->p->i_pitch;
1472     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
1473              p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1474              p_dst_orig->p->i_pitch *
1475              ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1476
1477     i_src_pix_pitch = p_src->p->i_pixel_pitch;
1478     i_src2_pitch = p_src->p->i_pitch;
1479     p_src2 = p_src->p->p_pixels +
1480              p_filter->fmt_in.video.i_x_offset * i_pix_pitch +
1481              p_src->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
1482
1483     /* Draw until we reach the bottom of the subtitle */
1484     for( i_y = 0; i_y < i_height; i_y++,
1485          p_dst += i_dst_pitch, p_src1 += i_src1_pitch, p_src2 += i_src2_pitch )
1486     {
1487         /* Draw until we reach the end of the line */
1488         for( i_x = 0; i_x < i_width; i_x++ )
1489         {
1490             const int R = p_src2[i_x * i_src_pix_pitch + 0];
1491             const int G = p_src2[i_x * i_src_pix_pitch + 1];
1492             const int B = p_src2[i_x * i_src_pix_pitch + 2];
1493
1494             i_trans = vlc_alpha( p_src2[i_x * i_src_pix_pitch + 3], i_alpha );
1495             if( !i_trans )
1496                 continue;
1497
1498             /* Blending */
1499             vlc_blend_rgb16( (uint16_t*)&p_dst[i_x * i_pix_pitch],
1500                              (const uint16_t*)&p_src1[i_x * i_pix_pitch],
1501                              R, G, B, i_trans, &p_filter->fmt_out.video );
1502         }
1503     }
1504 }
1505
1506 static void BlendRGBAYUVPacked( filter_t *p_filter, picture_t *p_dst_pic,
1507                                 picture_t *p_dst_orig, picture_t *p_src,
1508                                 int i_x_offset, int i_y_offset,
1509                                 int i_width, int i_height, int i_alpha )
1510 {
1511     int i_src1_pitch, i_src2_pitch, i_dst_pitch, i_src_pix_pitch;
1512     uint8_t *p_dst, *p_src1, *p_src2;
1513     uint8_t *p_trans;
1514     int i_x, i_y, i_pix_pitch, i_trans;
1515     bool b_even = !((i_x_offset + p_filter->fmt_out.video.i_x_offset)%2);
1516     int i_l_offset, i_u_offset, i_v_offset;
1517     uint8_t y, u, v;
1518
1519     vlc_yuv_packed_index( &i_l_offset, &i_u_offset, &i_v_offset,
1520                           p_filter->fmt_out.video.i_chroma );
1521
1522     i_pix_pitch = 2;
1523     i_dst_pitch = p_dst_pic->p->i_pitch;
1524     p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
1525             p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1526             p_dst_pic->p->i_pitch *
1527             ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1528
1529     i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
1530     p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
1531                p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
1532                p_dst_orig->p->i_pitch *
1533                ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
1534
1535     i_src_pix_pitch = p_src->p->i_pixel_pitch;
1536     i_src2_pitch = p_src->p->i_pitch;
1537     p_src2 = p_src->p->p_pixels +
1538              p_filter->fmt_in.video.i_x_offset * i_src2_pitch +
1539              p_src->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
1540
1541     i_width &= ~1; /* Needs to be a multiple of 2 */
1542
1543     /* Draw until we reach the bottom of the subtitle */
1544     for( i_y = 0; i_y < i_height; i_y++, p_trans += i_src2_pitch,
1545          p_dst += i_dst_pitch, p_src1 += i_src1_pitch,
1546          p_src2 += i_src2_pitch )
1547     {
1548         /* Draw until we reach the end of the line */
1549         for( i_x = 0; i_x < i_width; i_x++, b_even = !b_even )
1550         {
1551             const int R = p_src2[i_x * i_src_pix_pitch + 0];
1552             const int G = p_src2[i_x * i_src_pix_pitch + 1];
1553             const int B = p_src2[i_x * i_src_pix_pitch + 2];
1554
1555             i_trans = vlc_alpha( p_src2[i_x * i_src_pix_pitch + 3], i_alpha );
1556             if( !i_trans )
1557                 continue;
1558
1559             /* Blending */
1560             rgb_to_yuv( &y, &u, &v, R, G, B );
1561
1562             vlc_blend_packed( &p_dst[i_x * 2], &p_src1[i_x * 2],
1563                               i_l_offset, i_u_offset, i_v_offset,
1564                               y, u, v, i_trans, b_even );
1565         }
1566     }
1567 }