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

   1 /*****************************************************************************
   2  * video filter: video filter doing chroma conversion and resizing
   3  *               using the ffmpeg library
   4  *****************************************************************************
   5  * Copyright (C) 1999-2001 the VideoLAN team
   6  * $Id$
   7  *
   8  * Authors: Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <vlc/vlc.h>
  29 #include <vlc_codec.h>
  30 #include <vlc_vout.h>
  31 #include <vlc_filter.h>
  32
  33 /* ffmpeg header */
  34 #ifdef HAVE_FFMPEG_AVCODEC_H
  35 #   include <ffmpeg/avcodec.h>
  36 #else
  37 #   include <avcodec.h>
  38 #endif
  39
  40 #include "ffmpeg.h"
  41
  42
  43 #if !defined(HAVE_FFMPEG_SWSCALE_H) && !defined(HAVE_LIBSWSCALE_TREE)
  44 void E_(InitLibavcodec) ( vlc_object_t *p_object );
  45 static int CheckInit( filter_t *p_filter );
  46 static picture_t *Process( filter_t *p_filter, picture_t *p_pic );
  47 static picture_t *Deinterlace( filter_t *p_filter, picture_t *p_pic );
  48
  49 /*****************************************************************************
  50  * filter_sys_t : filter descriptor
  51  *****************************************************************************/
  52 struct filter_sys_t
  53 {
  54     vlc_bool_t b_resize;
  55     vlc_bool_t b_convert;
  56     vlc_bool_t b_resize_first;
  57     vlc_bool_t b_enable_croppadd;
  58
  59     es_format_t fmt_in;
  60     int i_src_ffmpeg_chroma;
  61     es_format_t fmt_out;
  62     int i_dst_ffmpeg_chroma;
  63
  64     AVPicture tmp_pic;
  65     ImgReSampleContext *p_rsc;
  66 };
  67
  68
  69 /*****************************************************************************
  70  * OpenFilterEx: common code to OpenFilter and OpenCropPadd
  71  *****************************************************************************/
  72 static int OpenFilterEx( vlc_object_t *p_this, vlc_bool_t b_enable_croppadd )
  73 {
  74     filter_t *p_filter = (filter_t*)p_this;
  75     filter_sys_t *p_sys;
  76     vlc_bool_t b_convert, b_resize;
  77
  78     /* Check if we can handle that formats */
  79     if( E_(GetFfmpegChroma)( p_filter->fmt_in.video.i_chroma ) < 0 ||
  80         E_(GetFfmpegChroma)( p_filter->fmt_out.video.i_chroma ) < 0 )
  81     {
  82         return VLC_EGENERIC;
  83     }
  84
  85     b_resize =
  86         p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
  87         p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height;
  88
  89     if ( b_enable_croppadd )
  90     {
  91         b_resize = b_resize ||
  92             p_filter->fmt_in.video.i_visible_width != p_filter->fmt_in.video.i_width ||
  93             p_filter->fmt_in.video.i_visible_height != p_filter->fmt_in.video.i_height ||
  94             p_filter->fmt_in.video.i_x_offset != 0 ||
  95             p_filter->fmt_in.video.i_y_offset != 0 ||
  96             p_filter->fmt_out.video.i_visible_width != p_filter->fmt_out.video.i_width ||
  97             p_filter->fmt_out.video.i_visible_height != p_filter->fmt_out.video.i_height ||
  98             p_filter->fmt_out.video.i_x_offset != 0 ||
  99             p_filter->fmt_out.video.i_y_offset != 0;
 100     }
 101
 102     b_convert =
 103         p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma;
 104
 105     if( !b_resize && !b_convert )
 106     {
 107         /* Nothing to do */
 108         return VLC_EGENERIC;
 109     }
 110
 111     /* Allocate the memory needed to store the decoder's structure */
 112     if( ( p_filter->p_sys = p_sys =
 113           (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
 114     {
 115         msg_Err( p_filter, "out of memory" );
 116         return VLC_EGENERIC;
 117     }
 118
 119     /* Misc init */
 120     p_sys->p_rsc = NULL;
 121     p_sys->b_enable_croppadd = b_enable_croppadd;
 122     p_sys->i_src_ffmpeg_chroma =
 123         E_(GetFfmpegChroma)( p_filter->fmt_in.video.i_chroma );
 124     p_sys->i_dst_ffmpeg_chroma =
 125         E_(GetFfmpegChroma)( p_filter->fmt_out.video.i_chroma );
 126     p_filter->pf_video_filter = Process;
 127     es_format_Init( &p_sys->fmt_in, 0, 0 );
 128     es_format_Init( &p_sys->fmt_out, 0, 0 );
 129
 130     /* Dummy alloc, will be reallocated in CheckInit */
 131     avpicture_alloc( &p_sys->tmp_pic, p_sys->i_src_ffmpeg_chroma,
 132                      p_filter->fmt_out.video.i_width,
 133                      p_filter->fmt_out.video.i_height );
 134
 135     if( CheckInit( p_filter ) != VLC_SUCCESS )
 136     {
 137         free( p_sys );
 138         return VLC_EGENERIC;
 139     }
 140
 141     msg_Dbg( p_filter, "input: %ix%i %4.4s -> %ix%i %4.4s",
 142              p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
 143              (char *)&p_filter->fmt_in.video.i_chroma,
 144              p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
 145              (char *)&p_filter->fmt_out.video.i_chroma );
 146
 147     /* libavcodec needs to be initialized for some chroma conversions */
 148     E_(InitLibavcodec)(p_this);
 149
 150     return VLC_SUCCESS;
 151 }
 152
 153 /*****************************************************************************
 154  * OpenFilter: probe the filter and return score
 155  *****************************************************************************/
 156 int E_(OpenFilter)( vlc_object_t *p_this )
 157 {
 158     return OpenFilterEx( p_this, VLC_FALSE );
 159 }
 160
 161 /*****************************************************************************
 162  * OpenCropPadd: probe the filter and return score
 163  *****************************************************************************/
 164 int E_(OpenCropPadd)( vlc_object_t *p_this )
 165 {
 166     return OpenFilterEx( p_this, VLC_TRUE );
 167 }
 168
 169
 170 /*****************************************************************************
 171  * CloseFilter: clean up the filter
 172  *****************************************************************************/
 173 void E_(CloseFilter)( vlc_object_t *p_this )
 174 {
 175     filter_t *p_filter = (filter_t*)p_this;
 176     filter_sys_t *p_sys = p_filter->p_sys;
 177
 178     if( p_sys->p_rsc ) img_resample_close( p_sys->p_rsc );
 179
 180     avpicture_free( &p_sys->tmp_pic );
 181
 182     free( p_sys );
 183 }
 184
 185 /*****************************************************************************
 186  * CheckInit: Initialise filter when necessary
 187  *****************************************************************************/
 188 static int CheckInit( filter_t *p_filter )
 189 {
 190     filter_sys_t *p_sys = p_filter->p_sys;
 191     vlc_bool_t b_change;
 192     int i_croptop=0;
 193     int i_cropbottom=0;
 194     int i_cropleft=0;
 195     int i_cropright=0;
 196     int i_paddtop=0;
 197     int i_paddbottom=0;
 198     int i_paddleft=0;
 199     int i_paddright=0;
 200
 201
 202     b_change= p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ||
 203         p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ||
 204         p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ||
 205         p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height;
 206
 207     if ( p_sys->b_enable_croppadd )
 208     {
 209         b_change = b_change ||
 210             p_filter->fmt_in.video.i_y_offset != p_sys->fmt_in.video.i_y_offset ||
 211             p_filter->fmt_in.video.i_x_offset != p_sys->fmt_in.video.i_x_offset ||
 212             p_filter->fmt_in.video.i_visible_width != p_sys->fmt_in.video.i_visible_width ||
 213             p_filter->fmt_in.video.i_visible_height != p_sys->fmt_in.video.i_visible_height ||
 214             p_filter->fmt_out.video.i_y_offset != p_sys->fmt_out.video.i_y_offset ||
 215             p_filter->fmt_out.video.i_x_offset != p_sys->fmt_out.video.i_x_offset ||
 216             p_filter->fmt_out.video.i_visible_width != p_sys->fmt_out.video.i_visible_width ||
 217             p_filter->fmt_out.video.i_visible_height != p_sys->fmt_out.video.i_visible_height;
 218     }
 219
 220     if ( b_change )
 221     {
 222         if( p_sys->p_rsc ) img_resample_close( p_sys->p_rsc );
 223         p_sys->p_rsc = 0;
 224
 225         p_sys->b_convert =
 226           p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma;
 227
 228         p_sys->b_resize =
 229           p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
 230           p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height;
 231
 232         p_sys->b_resize_first =
 233           p_filter->fmt_in.video.i_width * p_filter->fmt_in.video.i_height >
 234           p_filter->fmt_out.video.i_width * p_filter->fmt_out.video.i_height;
 235
 236         if( p_sys->b_resize &&
 237             p_sys->i_src_ffmpeg_chroma != PIX_FMT_YUV420P &&
 238             p_sys->i_src_ffmpeg_chroma != PIX_FMT_YUVJ420P &&
 239             p_sys->i_dst_ffmpeg_chroma != PIX_FMT_YUV420P &&
 240             p_sys->i_dst_ffmpeg_chroma != PIX_FMT_YUVJ420P )
 241         {
 242             msg_Err( p_filter, "img_resample_init only deals with I420" );
 243             return VLC_EGENERIC;
 244         }
 245         else if( p_sys->i_src_ffmpeg_chroma != PIX_FMT_YUV420P &&
 246                  p_sys->i_src_ffmpeg_chroma != PIX_FMT_YUVJ420P )
 247         {
 248             p_sys->b_resize_first = VLC_FALSE;
 249         }
 250         else if( p_sys->i_dst_ffmpeg_chroma != PIX_FMT_YUV420P &&
 251                  p_sys->i_dst_ffmpeg_chroma != PIX_FMT_YUVJ420P )
 252         {
 253             p_sys->b_resize_first = VLC_TRUE;
 254         }
 255
 256         if ( p_sys->b_enable_croppadd )
 257         {
 258             p_sys->b_resize = p_sys->b_resize ||
 259                 p_filter->fmt_in.video.i_visible_width != p_filter->fmt_in.video.i_width ||
 260                 p_filter->fmt_in.video.i_visible_height != p_filter->fmt_in.video.i_height ||
 261                 p_filter->fmt_in.video.i_x_offset != 0 ||
 262                 p_filter->fmt_in.video.i_y_offset != 0 ||
 263                 p_filter->fmt_out.video.i_visible_width != p_filter->fmt_out.video.i_width ||
 264                 p_filter->fmt_out.video.i_visible_height != p_filter->fmt_out.video.i_height ||
 265                 p_filter->fmt_out.video.i_x_offset != 0 ||
 266                 p_filter->fmt_out.video.i_y_offset != 0;
 267         }
 268
 269         if( p_sys->b_resize )
 270         {
 271             if ( p_sys->b_enable_croppadd )
 272             {
 273                 i_croptop=p_filter->fmt_in.video.i_y_offset;
 274                 i_cropbottom=p_filter->fmt_in.video.i_height
 275                                        - p_filter->fmt_in.video.i_visible_height
 276                                        - p_filter->fmt_in.video.i_y_offset;
 277                 i_cropleft=p_filter->fmt_in.video.i_x_offset;
 278                 i_cropright=p_filter->fmt_in.video.i_width
 279                                       - p_filter->fmt_in.video.i_visible_width
 280                                       - p_filter->fmt_in.video.i_x_offset;
 281
 282
 283                 i_paddtop=p_filter->fmt_out.video.i_y_offset;
 284                 i_paddbottom=p_filter->fmt_out.video.i_height
 285                                        - p_filter->fmt_out.video.i_visible_height
 286                                        - p_filter->fmt_out.video.i_y_offset;
 287                 i_paddleft=p_filter->fmt_out.video.i_x_offset;
 288                 i_paddright=p_filter->fmt_out.video.i_width
 289                                       - p_filter->fmt_out.video.i_visible_width
 290                                       - p_filter->fmt_out.video.i_x_offset;
 291             }
 292
 293             p_sys->p_rsc = img_resample_full_init(
 294                                p_filter->fmt_out.video.i_width,
 295                                p_filter->fmt_out.video.i_height,
 296                                p_filter->fmt_in.video.i_width,
 297                                p_filter->fmt_in.video.i_height,
 298                                i_croptop,i_cropbottom,
 299                                i_cropleft,i_cropright,
 300                                i_paddtop,i_paddbottom,
 301                                i_paddleft,i_paddright );
 302
 303             msg_Dbg( p_filter, "input: %ix%i -> %ix%i",
 304                 p_filter->fmt_out.video.i_width,
 305                 p_filter->fmt_out.video.i_height,
 306                 p_filter->fmt_in.video.i_width,
 307                 p_filter->fmt_in.video.i_height);
 308
 309             if( !p_sys->p_rsc )
 310             {
 311                 msg_Err( p_filter, "img_resample_init failed" );
 312                 return VLC_EGENERIC;
 313             }
 314         }
 315
 316         avpicture_free( &p_sys->tmp_pic );
 317
 318         if( p_sys->b_resize_first )
 319         {
 320             /* Resizing then conversion */
 321             avpicture_alloc( &p_sys->tmp_pic, p_sys->i_src_ffmpeg_chroma,
 322                              p_filter->fmt_out.video.i_width,
 323                              p_filter->fmt_out.video.i_height );
 324         }
 325         else
 326         {
 327             /* Conversion then resizing */
 328             avpicture_alloc( &p_sys->tmp_pic, p_sys->i_dst_ffmpeg_chroma,
 329                              p_filter->fmt_in.video.i_width,
 330                              p_filter->fmt_in.video.i_height );
 331         }
 332
 333         p_sys->fmt_in = p_filter->fmt_in;
 334         p_sys->fmt_out = p_filter->fmt_out;
 335     }
 336
 337     return VLC_SUCCESS;
 338 }
 339
 340 /* fill padd code from ffmpeg */
 341 static int padcolor[3] = { 16, 128, 128 };
 342
 343 /* Expects img to be yuv420 */
 344 static void fill_pad_region( AVPicture* img, int height, int width,
 345         int padtop, int padbottom, int padleft, int padright, int *color )
 346 {
 347     int i, y, shift;
 348     uint8_t *optr;
 349
 350     for ( i = 0; i < 3; i++ )
 351     {
 352         shift = ( i == 0 ) ? 0 : 1;
 353
 354         if ( padtop || padleft )
 355         {
 356             memset( img->data[i], color[i], ( ( ( img->linesize[i] * padtop ) +
 357                             padleft ) >> shift) );
 358         }
 359
 360         if ( padleft || padright )
 361         {
 362             optr = img->data[i] + ( img->linesize[i] * ( padtop >> shift ) ) +
 363                 ( img->linesize[i] - ( padright >> shift ) );
 364
 365             for ( y = 0; y < ( ( height - ( padtop + padbottom ) ) >> shift ); y++ )
 366             {
 367                 memset( optr, color[i], ( padleft + padright ) >> shift );
 368                 optr += img->linesize[i];
 369             }
 370         }
 371
 372         if (padbottom)
 373         {
 374             optr = img->data[i] + ( img->linesize[i] * ( ( height - padbottom ) >> shift ) );
 375             memset( optr, color[i], ( ( img->linesize[i] * padbottom ) >> shift ) );
 376         }
 377     }
 378 }
 379
 380 /* Workaround, because old libavcodec doesnt know how to padd */
 381 static void img_resample_padd( ImgReSampleContext *s, AVPicture *output,
 382         const AVPicture *input, int padtop, int padleft )
 383 {
 384     AVPicture nopadd_pic = *output;
 385
 386     /* shift out top and left padding for old ffmpeg */
 387     nopadd_pic.data[0] += ( nopadd_pic.linesize[0] * padtop + padleft );
 388     nopadd_pic.data[1] += ( nopadd_pic.linesize[1] * padtop + padleft ) >> 1;
 389     nopadd_pic.data[2] += ( nopadd_pic.linesize[2] * padtop + padleft ) >> 1;
 390     img_resample( s, &nopadd_pic, input );
 391 }
 392
 393
 394 /*****************************************************************************
 395  * Do the processing here
 396  *****************************************************************************/
 397 static picture_t *Process( filter_t *p_filter, picture_t *p_pic )
 398 {
 399     filter_sys_t *p_sys = p_filter->p_sys;
 400     AVPicture src_pic, dest_pic;
 401     AVPicture *p_src, *p_dst;
 402     picture_t *p_pic_dst;
 403     int i;
 404
 405     /* Check if format properties changed */
 406     if( CheckInit( p_filter ) != VLC_SUCCESS ) return 0;
 407
 408     /* Request output picture */
 409     p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
 410     if( !p_pic_dst )
 411     {
 412         msg_Warn( p_filter, "can't get output picture" );
 413         p_pic->pf_release( p_pic );
 414         return NULL;
 415     }
 416
 417     /* Prepare the AVPictures for the conversion */
 418     for( i = 0; i < p_pic->i_planes; i++ )
 419     {
 420         src_pic.data[i] = p_pic->p[i].p_pixels;
 421         src_pic.linesize[i] = p_pic->p[i].i_pitch;
 422     }
 423     for( i = 0; i < p_pic_dst->i_planes; i++ )
 424     {
 425         dest_pic.data[i] = p_pic_dst->p[i].p_pixels;
 426         dest_pic.linesize[i] = p_pic_dst->p[i].i_pitch;
 427     }
 428
 429     /* Special cases */
 430     if( p_filter->fmt_in.video.i_chroma == VLC_FOURCC('Y','V','1','2') ||
 431         p_filter->fmt_in.video.i_chroma == VLC_FOURCC('Y','V','U','9') )
 432     {
 433         /* Invert U and V */
 434         src_pic.data[1] = p_pic->p[2].p_pixels;
 435         src_pic.data[2] = p_pic->p[1].p_pixels;
 436     }
 437     if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','V','1','2') ||
 438         p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','V','U','9') )
 439     {
 440         /* Invert U and V */
 441         dest_pic.data[1] = p_pic_dst->p[2].p_pixels;
 442         dest_pic.data[2] = p_pic_dst->p[1].p_pixels;
 443     }
 444     if( p_sys->i_src_ffmpeg_chroma == PIX_FMT_RGB24 )
 445         if( p_filter->fmt_in.video.i_bmask == 0x00ff0000 )
 446             p_sys->i_src_ffmpeg_chroma = PIX_FMT_BGR24;
 447
 448     p_src = &src_pic;
 449
 450     if( p_sys->b_resize && p_sys->p_rsc )
 451     {
 452         p_dst = &dest_pic;
 453         if( p_sys->b_resize_first )
 454         {
 455             if( p_sys->b_convert ) p_dst = &p_sys->tmp_pic;
 456
 457             img_resample( p_sys->p_rsc, p_dst, p_src );
 458
 459             if (p_sys->b_enable_croppadd)
 460             {
 461                 if (p_filter->fmt_out.video.i_visible_width != p_filter->fmt_out.video.i_width ||
 462                     p_filter->fmt_out.video.i_visible_height != p_filter->fmt_out.video.i_height ||
 463                     p_filter->fmt_out.video.i_x_offset != 0 ||
 464                     p_filter->fmt_out.video.i_y_offset != 0)
 465                 {
 466                     fill_pad_region(p_dst, p_filter->fmt_out.video.i_height,
 467                                     p_filter->fmt_out.video.i_width,
 468                                     p_filter->fmt_out.video.i_y_offset,
 469                                     p_filter->fmt_out.video.i_height
 470                                       - p_filter->fmt_out.video.i_visible_height
 471                                       - p_filter->fmt_out.video.i_y_offset,
 472                                     p_filter->fmt_out.video.i_x_offset,
 473                                     p_filter->fmt_out.video.i_width
 474                                       - p_filter->fmt_out.video.i_visible_width
 475                                       - p_filter->fmt_out.video.i_x_offset,
 476                                     padcolor);
 477                 }
 478             }
 479
 480             p_src = p_dst;
 481         }
 482     }
 483
 484     if( p_sys->b_convert )
 485     {
 486         video_format_t *p_fmt = &p_filter->fmt_out.video;
 487         p_dst = &dest_pic;
 488         if( p_sys->b_resize && !p_sys->b_resize_first )
 489         {
 490             p_dst = &p_sys->tmp_pic;
 491             p_fmt = &p_filter->fmt_in.video;
 492         }
 493
 494         img_convert( p_dst, p_sys->i_dst_ffmpeg_chroma,
 495                      p_src, p_sys->i_src_ffmpeg_chroma,
 496                      p_fmt->i_width, p_fmt->i_height );
 497
 498         p_src = p_dst;
 499     }
 500
 501     if( p_sys->b_resize && !p_sys->b_resize_first && p_sys->p_rsc )
 502     {
 503         p_dst = &dest_pic;
 504
 505         img_resample( p_sys->p_rsc, p_dst, p_src );
 506
 507         if (p_sys->b_enable_croppadd)
 508         {
 509             if (p_filter->fmt_out.video.i_visible_width != p_filter->fmt_out.video.i_width ||
 510                 p_filter->fmt_out.video.i_visible_height != p_filter->fmt_out.video.i_height ||
 511                 p_filter->fmt_out.video.i_x_offset != 0 ||
 512                 p_filter->fmt_out.video.i_y_offset != 0)
 513             {
 514                 fill_pad_region(p_dst, p_filter->fmt_out.video.i_height,
 515                                 p_filter->fmt_out.video.i_width,
 516                                 p_filter->fmt_out.video.i_y_offset,
 517                                 p_filter->fmt_out.video.i_height
 518                                   - p_filter->fmt_out.video.i_visible_height
 519                                   - p_filter->fmt_out.video.i_y_offset,
 520                                 p_filter->fmt_out.video.i_x_offset,
 521                                 p_filter->fmt_out.video.i_width
 522                                   - p_filter->fmt_out.video.i_visible_width
 523                                   - p_filter->fmt_out.video.i_x_offset,
 524                                 padcolor);
 525             }
 526         }
 527     }
 528
 529     /* Special case for RV32 -> YUVA */
 530     if( !p_sys->b_resize &&
 531         p_filter->fmt_in.video.i_chroma == VLC_FOURCC('R','V','3','2') &&
 532         p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
 533     {
 534         uint8_t *p_src = p_pic->p[0].p_pixels;
 535         int i_src_pitch = p_pic->p[0].i_pitch;
 536         uint8_t *p_dst = p_pic_dst->p[3].p_pixels;
 537         int i_dst_pitch = p_pic_dst->p[3].i_pitch;
 538         uint32_t l,j;
 539
 540         for( l = 0; l < p_filter->fmt_out.video.i_height; l++ )
 541         {
 542             for( j = 0; j < p_filter->fmt_out.video.i_width; j++ )
 543             {
 544               p_dst[j] = p_src[j*4+3];
 545             }
 546             p_src += i_src_pitch;
 547             p_dst += i_dst_pitch;
 548         }
 549     }
 550     else if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
 551     {
 552         /* Special case for YUVA */
 553         memset( p_pic_dst->p[3].p_pixels, 0xFF,
 554                 p_pic_dst->p[3].i_pitch * p_pic_dst->p[3].i_lines );
 555     }
 556
 557     p_pic_dst->date = p_pic->date;
 558     p_pic_dst->b_force = p_pic->b_force;
 559     p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
 560     p_pic_dst->b_progressive = p_pic->b_progressive;
 561     p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
 562
 563     p_pic->pf_release( p_pic );
 564     return p_pic_dst;
 565 }
 566
 567 /*****************************************************************************
 568  * OpenDeinterlace: probe the filter and return score
 569  *****************************************************************************/
 570 int E_(OpenDeinterlace)( vlc_object_t *p_this )
 571 {
 572     filter_t *p_filter = (filter_t*)p_this;
 573     filter_sys_t *p_sys;
 574
 575     /* Check if we can handle that formats */
 576     if( E_(GetFfmpegChroma)( p_filter->fmt_in.video.i_chroma ) < 0 )
 577     {
 578         return VLC_EGENERIC;
 579     }
 580
 581     /* Allocate the memory needed to store the decoder's structure */
 582     if( ( p_filter->p_sys = p_sys =
 583           (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
 584     {
 585         msg_Err( p_filter, "out of memory" );
 586         return VLC_EGENERIC;
 587     }
 588
 589     /* Misc init */
 590     p_sys->i_src_ffmpeg_chroma =
 591         E_(GetFfmpegChroma)( p_filter->fmt_in.video.i_chroma );
 592     p_filter->pf_video_filter = Deinterlace;
 593
 594     msg_Dbg( p_filter, "deinterlacing" );
 595
 596     /* libavcodec needs to be initialized for some chroma conversions */
 597     E_(InitLibavcodec)(p_this);
 598
 599     return VLC_SUCCESS;
 600 }
 601
 602 /*****************************************************************************
 603  * CloseDeinterlace: clean up the filter
 604  *****************************************************************************/
 605 void E_(CloseDeinterlace)( vlc_object_t *p_this )
 606 {
 607     filter_t *p_filter = (filter_t*)p_this;
 608     filter_sys_t *p_sys = p_filter->p_sys;
 609
 610     free( p_sys );
 611 }
 612
 613 /*****************************************************************************
 614  * Do the processing here
 615  *****************************************************************************/
 616 static picture_t *Deinterlace( filter_t *p_filter, picture_t *p_pic )
 617 {
 618     filter_sys_t *p_sys = p_filter->p_sys;
 619     AVPicture src_pic, dest_pic;
 620     picture_t *p_pic_dst;
 621     int i;
 622
 623     /* Request output picture */
 624     p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
 625     if( !p_pic_dst )
 626     {
 627         msg_Warn( p_filter, "can't get output picture" );
 628         return NULL;
 629     }
 630
 631     /* Prepare the AVPictures for the conversion */
 632     for( i = 0; i < p_pic->i_planes; i++ )
 633     {
 634         src_pic.data[i] = p_pic->p[i].p_pixels;
 635         src_pic.linesize[i] = p_pic->p[i].i_pitch;
 636     }
 637     for( i = 0; i < p_pic_dst->i_planes; i++ )
 638     {
 639         dest_pic.data[i] = p_pic_dst->p[i].p_pixels;
 640         dest_pic.linesize[i] = p_pic_dst->p[i].i_pitch;
 641     }
 642
 643     avpicture_deinterlace( &dest_pic, &src_pic, p_sys->i_src_ffmpeg_chroma,
 644                            p_filter->fmt_in.video.i_width,
 645                            p_filter->fmt_in.video.i_height );
 646
 647     p_pic_dst->date = p_pic->date;
 648     p_pic_dst->b_force = p_pic->b_force;
 649     p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
 650     p_pic_dst->b_progressive = VLC_TRUE;
 651     p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
 652
 653     p_pic->pf_release( p_pic );
 654     return p_pic_dst;
 655 }
 656
 657 #endif /* ( (defined(HAVE_FFMPEG_SWSCALE_H) || defined(HAVE_LIBSWSCALE_TREE)) */