modules/codec/dirac.c

   1 /*****************************************************************************
   2  * dirac.c: Dirac encoder module making use of libdirac (dirac-research).
   3  *          (http://www.bbc.co.uk/rd/projects/dirac/index.shtml)
   4  *          ##
   5  *          ## NB, this is a temporary encoder only module until schroedinger
   6  *          ## offers superior encoding quality than dirac-research
   7  *          ##
   8  *****************************************************************************
   9  * Copyright (C) 2004-2008 the VideoLAN team
  10  * $Id$
  11  *
  12  * Authors: Gildas Bazin <gbazin@videolan.org>
  13  * Rewritten: David Flynn <davidf at rd.bbc.co.uk>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  28  *****************************************************************************/
  29
  30 /*****************************************************************************
  31  * Preamble
  32  *****************************************************************************/
  33 #ifdef HAVE_CONFIG_H
  34 # include "config.h"
  35 #endif
  36
  37 #include <limits.h>
  38
  39 #include <vlc_common.h>
  40 #include <vlc_plugin.h>
  41 #include <vlc_codec.h>
  42 #include <vlc_sout.h>
  43 #include <vlc_vout.h>
  44
  45 #include <libdirac_encoder/dirac_encoder.h>
  46
  47 #ifndef DIRAC_RESEARCH_VERSION_ATLEAST
  48 # define DIRAC_RESEARCH_VERSION_ATLEAST(x,y,z) 0
  49 #endif
  50
  51 /*****************************************************************************
  52  * Local prototypes
  53  *****************************************************************************/
  54 static int  OpenEncoder( vlc_object_t *p_this );
  55 static void CloseEncoder( vlc_object_t *p_this );
  56 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
  57
  58 #define ENC_CFG_PREFIX "sout-dirac-"
  59
  60 #define ENC_QUALITY_FACTOR "quality"
  61 #define ENC_QUALITY_FACTOR_TEXT N_("Constant quality factor")
  62 #define ENC_QUALITY_FACTOR_LONGTEXT N_("If bitrate=0, use this value for constant quality")
  63
  64 #define ENC_TARGETRATE "bitrate"
  65 #define ENC_TARGETRATE_TEXT N_("CBR bitrate (kbps)")
  66 #define ENC_TARGETRATE_LONGTEXT N_("A value > 0 enables constant bitrate mode")
  67
  68 #define ENC_LOSSLESS "lossless"
  69 #define ENC_LOSSLESS_TEXT N_("Enable lossless coding")
  70 #define ENC_LOSSLESS_LONGTEXT N_("Lossless coding ignores bitrate and quality settings, " \
  71                                  "allowing for perfect reproduction of the original")
  72
  73 #define ENC_PREFILTER "prefilter"
  74 #define ENC_PREFILTER_TEXT N_("Prefilter")
  75 #define ENC_PREFILTER_LONGTEXT N_("Enable adaptive prefiltering")
  76 static const char *const enc_prefilter_list[] =
  77   { "none", "cwm", "rectlp", "diaglp" };
  78 static const char *const enc_prefilter_list_text[] =
  79   { N_("none"), N_("Centre Weighted Median"),
  80     N_("Rectangular Linear Phase"), N_("Diagonal Linear Phase") };
  81
  82 #define ENC_PREFILTER_STRENGTH "prefilter-strength"
  83 #define ENC_PREFILTER_STRENGTH_TEXT N_("Amount of prefiltering")
  84 #define ENC_PREFILTER_STRENGTH_LONGTEXT N_("Higher value implies more prefiltering")
  85
  86 #define ENC_CHROMAFMT "chroma-fmt"
  87 #define ENC_CHROMAFMT_TEXT N_("Chroma format")
  88 #define ENC_CHROMAFMT_LONGTEXT N_("Picking chroma format will force a " \
  89                                   "conversion of the video into that format")
  90 static const char *const enc_chromafmt_list[] =
  91   { "420", "422", "444" };
  92 static const char *const enc_chromafmt_list_text[] =
  93   { N_("4:2:0"), N_("4:2:2"), N_("4:4:4") };
  94
  95 #define ENC_L1SEP "l1-sep"
  96 #define ENC_L1SEP_TEXT N_("Distance between 'P' frames")
  97 #define ENC_L1SEP_LONGTEXT ENC_L1SEP_TEXT
  98
  99 #define ENC_L1NUM "num-l1"
 100 #define ENC_L1NUM_TEXT N_("Number of 'P' frames per GOP")
 101 #define ENC_L1NUM_LONGTEXT ENC_L1NUM_TEXT
 102
 103 #define ENC_CODINGMODE "coding-mode"
 104 #define ENC_CODINGMODE_TEXT N_("Picture coding mode")
 105 #define ENC_CODINGMODE_LONGTEXT N_("Field coding is where interlaced fields are coded" \
 106                                    " seperately as opposed to a pseudo-progressive frame")
 107 static const char *const enc_codingmode_list[] =
 108   { "auto", "progressive", "field" };
 109 static const char *const enc_codingmode_list_text[] =
 110   { N_("auto - let encoder decide based upon input (Best)"),
 111     N_("force coding frame as single picture"),
 112     N_("force coding frame as seperate interlaced fields"),
 113   };
 114
 115 #define ENC_MCBLK_WIDTH "mc-blk-width"
 116 #define ENC_MCBLK_WIDTH_TEXT N_("Width of motion compensation blocks")
 117 #define ENC_MCBLK_WIDTH_LONGTEXT ""
 118
 119 #define ENC_MCBLK_HEIGHT "mc-blk-height"
 120 #define ENC_MCBLK_HEIGHT_TEXT N_("Height of motion compensation blocks")
 121 #define ENC_MCBLK_HEIGHT_LONGTEXT ""
 122
 123 /* also known as XBSEP and YBSEP */
 124 #define ENC_MCBLK_OVERLAP "mc-blk-overlap"
 125 #define ENC_MCBLK_OVERLAP_TEXT N_("Block overlap (%)")
 126 #define ENC_MCBLK_OVERLAP_LONGTEXT N_("Amount that each motion block should " \
 127                                        "be overlapped by its neighbours")
 128
 129 /* advanced option only */
 130 #define ENC_MCBLK_XBLEN "mc-blk-xblen"
 131 #define ENC_MCBLK_XBLEN_TEXT N_("xblen")
 132 #define ENC_MCBLK_XBLEN_LONGTEXT N_("Total horizontal block length including overlaps")
 133
 134 /* advanded option only */
 135 #define ENC_MCBLK_YBLEN "mc-blk-yblen"
 136 #define ENC_MCBLK_YBLEN_TEXT N_("yblen")
 137 #define ENC_MCBLK_YBLEN_LONGTEXT N_("Total vertical block length including overlaps")
 138
 139 #define ENC_MVPREC "mv-prec"
 140 #define ENC_MVPREC_TEXT N_("Motion vector precision")
 141 #define ENC_MVPREC_LONGTEXT N_("Motion vector precision in pels.")
 142 static const char *const enc_mvprec_list[] =
 143   { "1", "1/2", "1/4", "1/8" };
 144
 145 #define ENC_ME_SIMPLESEARCH "me-simple-search"
 146 #define ENC_ME_SIMPLESEARCH_TEXT N_("Simple ME search area x:y")
 147 #define ENC_ME_SIMPLESEARCH_LONGTEXT N_("(Not recommended) Perform a simple (non hierarchical " \
 148                                         "block matching motion vector search with search range " \
 149                                         "of +/-x, +/-y")
 150
 151 #define ENC_ME_COMBINED "me-combined"
 152 #define ENC_ME_COMBINED_TEXT N_("Three component motion estimation")
 153 #define ENC_ME_COMBINED_LONGTEXT N_("Use chroma as part of the motion estimation process")
 154
 155 #define ENC_DWTINTRA "dwt-intra"
 156 #define ENC_DWTINTRA_TEXT N_("Intra picture DWT filter")
 157 #define ENC_DWTINTRA_LONGTEXT ENC_DWTINTRA_TEXT
 158
 159 #define ENC_DWTINTER "dwt-inter"
 160 #define ENC_DWTINTER_TEXT N_("Inter picture DWT filter")
 161 #define ENC_DWTINTER_LONGTEXT ENC_DWTINTER_TEXT
 162
 163 #define ENC_DWTDEPTH "dwt-depth"
 164 #define ENC_DWTDEPTH_TEXT N_("Number of DWT iterations")
 165 #define ENC_DWTDEPTH_LONGTEXT N_("Also known as DWT levels")
 166
 167 /* advanced option only */
 168 #define ENC_MULTIQUANT "multi-quant"
 169 #define ENC_MULTIQUANT_TEXT N_("Enable multiple quantizers")
 170 #define ENC_MULTIQUANT_LONGTEXT N_("Enable multiple quantizers per subband (one per codeblock)")
 171
 172 /* advanced option only */
 173 #define ENC_SPARTITION "spartition"
 174 #define ENC_SPARTITION_TEXT N_("Enable spatial partitioning")
 175 #define ENC_SPARTITION_LONGTEXT ENC_SPARTITION_TEXT
 176
 177 #define ENC_NOAC "noac"
 178 #define ENC_NOAC_TEXT N_("Disable arithmetic coding")
 179 #define ENC_NOAC_LONGTEXT N_("Use variable length codes instead, useful for very high bitrates")
 180
 181 /* visual modelling */
 182 /* advanced option only */
 183 #define ENC_CPD "cpd"
 184 #define ENC_CPD_TEXT N_("cycles per degree")
 185 #define ENC_CPD_LONGTEXT ENC_CPD_TEXT
 186
 187 static const char *const ppsz_enc_options[] = {
 188     ENC_QUALITY_FACTOR, ENC_TARGETRATE, ENC_LOSSLESS, ENC_PREFILTER, ENC_PREFILTER_STRENGTH,
 189     ENC_CHROMAFMT, ENC_L1SEP, ENC_L1NUM, ENC_CODINGMODE,
 190     ENC_MCBLK_WIDTH, ENC_MCBLK_HEIGHT, ENC_MCBLK_OVERLAP,
 191     ENC_MVPREC, ENC_ME_SIMPLESEARCH, ENC_ME_COMBINED,
 192     ENC_DWTINTRA, ENC_DWTINTER, ENC_DWTDEPTH,
 193     ENC_MULTIQUANT, ENC_SPARTITION, ENC_NOAC,
 194     ENC_CPD,
 195     NULL
 196 };
 197
 198
 199 /*****************************************************************************
 200  * Module descriptor
 201  *****************************************************************************/
 202
 203 vlc_module_begin()
 204     set_category( CAT_INPUT )
 205     set_subcategory( SUBCAT_INPUT_VCODEC )
 206     set_description( N_("Dirac video encoder using dirac-research library") )
 207     set_capability( "encoder", 100 )
 208     set_callbacks( OpenEncoder, CloseEncoder )
 209
 210     add_float( ENC_CFG_PREFIX ENC_QUALITY_FACTOR, 5.5, NULL,
 211                ENC_QUALITY_FACTOR_TEXT, ENC_QUALITY_FACTOR_LONGTEXT, false );
 212     change_float_range(0., 10.);
 213
 214     add_integer( ENC_CFG_PREFIX ENC_TARGETRATE, -1, NULL,
 215                  ENC_TARGETRATE_TEXT, ENC_TARGETRATE_LONGTEXT, false );
 216     change_integer_range(-1, INT_MAX);
 217
 218     add_bool( ENC_CFG_PREFIX ENC_LOSSLESS, false, NULL,
 219               ENC_LOSSLESS_TEXT, ENC_LOSSLESS_LONGTEXT, false );
 220
 221     add_string( ENC_CFG_PREFIX ENC_PREFILTER, "diaglp", NULL,
 222                 ENC_PREFILTER_TEXT, ENC_PREFILTER_LONGTEXT, false );
 223     change_string_list( enc_prefilter_list, enc_prefilter_list_text, 0 );
 224
 225     add_integer( ENC_CFG_PREFIX ENC_PREFILTER_STRENGTH, 1, NULL,
 226                  ENC_PREFILTER_STRENGTH_TEXT, ENC_PREFILTER_STRENGTH_LONGTEXT, false );
 227     change_integer_range(0, 10);
 228
 229     add_string( ENC_CFG_PREFIX ENC_CHROMAFMT, "420", NULL,
 230                 ENC_CHROMAFMT_TEXT, ENC_CHROMAFMT_LONGTEXT, false );
 231     change_string_list( enc_chromafmt_list, enc_chromafmt_list_text, 0 );
 232
 233     add_integer( ENC_CFG_PREFIX ENC_L1SEP, -1, NULL,
 234                  ENC_L1SEP_TEXT, ENC_L1SEP_LONGTEXT, false );
 235     change_integer_range(-1, INT_MAX);
 236
 237     add_integer( ENC_CFG_PREFIX ENC_L1NUM, -1, NULL,
 238                  ENC_L1NUM_TEXT, ENC_L1NUM_LONGTEXT, false );
 239     change_integer_range(-1, INT_MAX);
 240
 241     add_string( ENC_CFG_PREFIX ENC_CODINGMODE, "auto", NULL,
 242                 ENC_CODINGMODE_TEXT, ENC_CODINGMODE_LONGTEXT, false );
 243     change_string_list( enc_codingmode_list, enc_codingmode_list_text, 0 );
 244
 245     add_string( ENC_CFG_PREFIX ENC_MVPREC, "1/2", NULL,
 246                 ENC_MVPREC_TEXT, ENC_MVPREC_LONGTEXT, false );
 247     change_string_list( enc_mvprec_list, enc_mvprec_list, 0 );
 248
 249     add_integer( ENC_CFG_PREFIX ENC_MCBLK_WIDTH, -1, NULL,
 250                  ENC_MCBLK_WIDTH_TEXT, ENC_MCBLK_WIDTH_LONGTEXT, false );
 251     add_deprecated_alias( ENC_CFG_PREFIX ENC_MCBLK_XBLEN );
 252     change_integer_range(-1, INT_MAX);
 253
 254     add_integer( ENC_CFG_PREFIX ENC_MCBLK_HEIGHT, -1, NULL,
 255                  ENC_MCBLK_HEIGHT, ENC_MCBLK_HEIGHT_LONGTEXT, false );
 256     add_deprecated_alias( ENC_CFG_PREFIX ENC_MCBLK_YBLEN );
 257     change_integer_range(-1, INT_MAX);
 258
 259     add_integer( ENC_CFG_PREFIX ENC_MCBLK_OVERLAP, -1, NULL,
 260                  ENC_MCBLK_OVERLAP_TEXT, ENC_MCBLK_OVERLAP_LONGTEXT, false );
 261     change_integer_range(-1, 100);
 262
 263     /* advanced option only */
 264     add_integer( ENC_CFG_PREFIX ENC_MCBLK_XBLEN, -1, NULL,
 265                  ENC_MCBLK_XBLEN_TEXT, ENC_MCBLK_XBLEN_LONGTEXT, true );
 266     change_integer_range(-1, INT_MAX);
 267     /* advanced option only */
 268     add_integer( ENC_CFG_PREFIX ENC_MCBLK_YBLEN, -1, NULL,
 269                  ENC_MCBLK_YBLEN_TEXT, ENC_MCBLK_YBLEN_LONGTEXT, true );
 270     change_integer_range(-1, INT_MAX);
 271
 272     add_string( ENC_CFG_PREFIX ENC_ME_SIMPLESEARCH, "", NULL,
 273               ENC_ME_SIMPLESEARCH_TEXT, ENC_ME_SIMPLESEARCH_LONGTEXT, false );
 274
 275 #if DIRAC_RESEARCH_VERSION_ATLEAST(1,0,1)
 276     add_bool( ENC_CFG_PREFIX ENC_ME_COMBINED, true, NULL,
 277               ENC_ME_COMBINED_TEXT, ENC_ME_COMBINED_LONGTEXT, false );
 278 #endif
 279
 280     add_integer( ENC_CFG_PREFIX ENC_DWTINTRA, -1, NULL,
 281                  ENC_DWTINTRA_TEXT, ENC_DWTINTRA_LONGTEXT, false );
 282     change_integer_range(-1, 6);
 283
 284     add_integer( ENC_CFG_PREFIX ENC_DWTINTER, -1, NULL,
 285                  ENC_DWTINTER_TEXT, ENC_DWTINTER_LONGTEXT, false );
 286     change_integer_range(-1, 6);
 287
 288     add_integer( ENC_CFG_PREFIX ENC_DWTDEPTH, -1, NULL,
 289                  ENC_DWTDEPTH_TEXT, ENC_DWTDEPTH_LONGTEXT, false );
 290     change_integer_range(-1, 4);
 291
 292     /* advanced option only */
 293     /* NB, unforunately vlc doesn't have a concept of 'dont care' */
 294     add_integer( ENC_CFG_PREFIX ENC_MULTIQUANT, -1, NULL,
 295                  ENC_MULTIQUANT_TEXT, ENC_MULTIQUANT_LONGTEXT, true );
 296     change_integer_range(-1, 1);
 297
 298     /* advanced option only */
 299     /* NB, unforunately vlc doesn't have a concept of 'dont care' */
 300     add_integer( ENC_CFG_PREFIX ENC_SPARTITION, -1, NULL,
 301                  ENC_SPARTITION_TEXT, ENC_SPARTITION_LONGTEXT, true );
 302     change_integer_range(-1, 1);
 303
 304     add_bool( ENC_CFG_PREFIX ENC_NOAC, false, NULL,
 305               ENC_NOAC_TEXT, ENC_NOAC_LONGTEXT, false );
 306
 307     /* advanced option only */
 308     add_float( ENC_CFG_PREFIX ENC_CPD, -1, NULL,
 309                ENC_CPD_TEXT, ENC_CPD_LONGTEXT, true );
 310     change_integer_range(-1, INT_MAX);
 311 vlc_module_end()
 312
 313 /*****************************************************************************
 314  * picture_pts_t : store pts alongside picture number, not carried through
 315  * encoder
 316  *****************************************************************************/
 317 struct picture_pts_t
 318 {
 319    bool b_empty;      /* entry is invalid */
 320    uint32_t u_pnum;  /* dirac picture number */
 321    mtime_t i_pts;    /* associated pts */
 322 };
 323
 324 /*****************************************************************************
 325  * encoder_sys_t : dirac encoder descriptor
 326  *****************************************************************************/
 327 #define PTS_TLB_SIZE 256
 328 struct encoder_sys_t
 329 {
 330     dirac_encoder_t *p_dirac;
 331     dirac_encoder_context_t ctx;
 332     bool b_auto_field_coding;
 333
 334     uint8_t *p_buffer_in;
 335     int i_buffer_in;
 336     uint32_t i_input_picnum;
 337     block_fifo_t *p_dts_fifo;
 338
 339     int i_buffer_out;
 340     uint8_t *p_buffer_out;
 341     block_t *p_chain;
 342
 343     struct picture_pts_t pts_tlb[PTS_TLB_SIZE];
 344     mtime_t i_pts_offset;
 345     mtime_t i_field_time;
 346 };
 347
 348 static struct
 349 {
 350     unsigned int i_height;
 351     int i_approx_fps;
 352     VideoFormat i_vf;
 353 } dirac_format_guess[] = {
 354     /* Important: Keep this list ordered in ascending picture height */
 355     {1, 0, VIDEO_FORMAT_CUSTOM},
 356     {120, 15, VIDEO_FORMAT_QSIF525},
 357     {144, 12, VIDEO_FORMAT_QCIF},
 358     {240, 15, VIDEO_FORMAT_SIF525},
 359     {288, 12, VIDEO_FORMAT_CIF},
 360     {480, 30, VIDEO_FORMAT_SD_480I60},
 361     {480, 15, VIDEO_FORMAT_4SIF525},
 362     {576, 12, VIDEO_FORMAT_4CIF},
 363     {576, 25, VIDEO_FORMAT_SD_576I50},
 364     {720, 50, VIDEO_FORMAT_HD_720P50},
 365     {720, 60, VIDEO_FORMAT_HD_720P60},
 366     {1080, 24, VIDEO_FORMAT_DIGI_CINEMA_2K24},
 367     {1080, 25, VIDEO_FORMAT_HD_1080I50},
 368     {1080, 30, VIDEO_FORMAT_HD_1080I60},
 369     {1080, 50, VIDEO_FORMAT_HD_1080P50},
 370     {1080, 60, VIDEO_FORMAT_HD_1080P60},
 371     {2160, 24, VIDEO_FORMAT_DIGI_CINEMA_4K24},
 372     {2160, 50, VIDEO_FORMAT_UHDTV_4K50},
 373     {2160, 60, VIDEO_FORMAT_UHDTV_4K60},
 374     {3840, 50, VIDEO_FORMAT_UHDTV_8K50},
 375     {3840, 60, VIDEO_FORMAT_UHDTV_8K60},
 376     {0, 0, 0},
 377 };
 378
 379 /*****************************************************************************
 380  * ResetPTStlb: Purge all entries in @p_dec@'s PTS-tlb
 381  *****************************************************************************/
 382 static void ResetPTStlb( encoder_t *p_enc )
 383 {
 384     encoder_sys_t *p_sys = p_enc->p_sys;
 385     for( int i=0; i<PTS_TLB_SIZE; i++)
 386     {
 387         p_sys->pts_tlb[i].b_empty = true;
 388     }
 389 }
 390
 391 /*****************************************************************************
 392  * StorePicturePTS: Store the PTS value for a particular picture number
 393  *****************************************************************************/
 394 static void StorePicturePTS( encoder_t *p_enc, uint32_t u_pnum, mtime_t i_pts )
 395 {
 396     encoder_sys_t *p_sys = p_enc->p_sys;
 397
 398     for( int i=0; i<PTS_TLB_SIZE; i++ )
 399     {
 400         if( p_sys->pts_tlb[i].b_empty )
 401         {
 402             p_sys->pts_tlb[i].u_pnum = u_pnum;
 403             p_sys->pts_tlb[i].i_pts = i_pts;
 404             p_sys->pts_tlb[i].b_empty = false;
 405
 406             return;
 407         }
 408     }
 409
 410     msg_Err( p_enc, "Could not store PTS %"PRId64" for frame %u", i_pts, u_pnum );
 411 }
 412
 413 /*****************************************************************************
 414  * GetPicturePTS: Retrieve the PTS value for a particular picture number
 415  *****************************************************************************/
 416 static mtime_t GetPicturePTS( encoder_t *p_enc, uint32_t u_pnum )
 417 {
 418     encoder_sys_t *p_sys = p_enc->p_sys;
 419
 420     for( int i=0; i<PTS_TLB_SIZE; i++ )
 421     {
 422         if( !p_sys->pts_tlb[i].b_empty &&
 423             p_sys->pts_tlb[i].u_pnum == u_pnum )
 424         {
 425              p_sys->pts_tlb[i].b_empty = true;
 426              return p_sys->pts_tlb[i].i_pts;
 427         }
 428     }
 429
 430     msg_Err( p_enc, "Could not retrieve PTS for picture %u", u_pnum );
 431     return 0;
 432 }
 433
 434 /*****************************************************************************
 435  * OpenEncoder: probe the encoder and return score
 436  *****************************************************************************/
 437 static int OpenEncoder( vlc_object_t *p_this )
 438 {
 439     encoder_t *p_enc = (encoder_t *)p_this;
 440     encoder_sys_t *p_sys = p_enc->p_sys;
 441     int i_tmp;
 442     float f_tmp;
 443     char *psz_tmp;
 444
 445     if( p_enc->fmt_out.i_codec != VLC_FOURCC('d','r','a','c') &&
 446         !p_enc->b_force )
 447     {
 448         return VLC_EGENERIC;
 449     }
 450
 451     if( !p_enc->fmt_in.video.i_frame_rate || !p_enc->fmt_in.video.i_frame_rate_base ||
 452         !p_enc->fmt_in.video.i_height || !p_enc->fmt_in.video.i_width )
 453     {
 454         msg_Err( p_enc, "Framerate and picture dimensions must be non-zero" );
 455         return VLC_EGENERIC;
 456     }
 457
 458     /* Allocate the memory needed to store the decoder's structure */
 459     if( ( p_sys = calloc( 1, sizeof(*p_sys) ) ) == NULL )
 460         return VLC_ENOMEM;
 461
 462     p_enc->p_sys = p_sys;
 463     p_enc->pf_encode_video = Encode;
 464     p_enc->fmt_out.i_codec = VLC_FOURCC('d','r','a','c');
 465     p_enc->fmt_out.i_cat = VIDEO_ES;
 466
 467     if( ( p_sys->p_dts_fifo = block_FifoNew() ) == NULL )
 468     {
 469         CloseEncoder( p_this );
 470         return VLC_ENOMEM;
 471     }
 472
 473     ResetPTStlb( p_enc );
 474
 475     /* guess the video format based upon number of lines and picture height */
 476     int i = 0;
 477     VideoFormat guessed_video_fmt = VIDEO_FORMAT_CUSTOM;
 478     /* Pick the dirac_video_format in this order of preference:
 479      *  1. an exact match in frame height and an approximate fps match
 480      *  2. the previous preset with a smaller number of lines.
 481      */
 482     do
 483     {
 484         if( dirac_format_guess[i].i_height > p_enc->fmt_in.video.i_height )
 485         {
 486             guessed_video_fmt = dirac_format_guess[i-1].i_vf;
 487             break;
 488         }
 489         if( dirac_format_guess[i].i_height != p_enc->fmt_in.video.i_height )
 490             continue;
 491         int src_fps = p_enc->fmt_in.video.i_frame_rate / p_enc->fmt_in.video.i_frame_rate_base;
 492         int delta_fps = abs( dirac_format_guess[i].i_approx_fps - src_fps );
 493         if( delta_fps > 2 )
 494             continue;
 495
 496         guessed_video_fmt = dirac_format_guess[i].i_vf;
 497         break;
 498     } while( dirac_format_guess[++i].i_height );
 499
 500     dirac_encoder_context_init( &p_sys->ctx, guessed_video_fmt );
 501
 502     /* constants set from the input video format */
 503     p_sys->ctx.src_params.width = p_enc->fmt_in.video.i_width;
 504     p_sys->ctx.src_params.height = p_enc->fmt_in.video.i_height;
 505     p_sys->ctx.src_params.frame_rate.numerator = p_enc->fmt_in.video.i_frame_rate;
 506     p_sys->ctx.src_params.frame_rate.denominator = p_enc->fmt_in.video.i_frame_rate_base;
 507     unsigned u_asr_num, u_asr_den;
 508     vlc_ureduce( &u_asr_num, &u_asr_den,
 509                  p_enc->fmt_in.video.i_height * p_enc->fmt_in.video.i_aspect,
 510                  p_enc->fmt_in.video.i_width * VOUT_ASPECT_FACTOR,
 511                  0 );
 512     p_sys->ctx.src_params.pix_asr.numerator = u_asr_num;
 513     p_sys->ctx.src_params.pix_asr.denominator = u_asr_den;
 514
 515     config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
 516
 517     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_CHROMAFMT );
 518     if( !psz_tmp )
 519         goto error;
 520     else if( !strcmp( psz_tmp, "420" ) ) {
 521         p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
 522         p_enc->fmt_in.video.i_bits_per_pixel = 12;
 523         p_sys->ctx.src_params.chroma = format420;
 524         p_sys->i_buffer_in = p_enc->fmt_in.video.i_width * p_enc->fmt_in.video.i_height * 3 / 2;
 525     }
 526     else if( !strcmp( psz_tmp, "422" ) ) {
 527         p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','2');
 528         p_enc->fmt_in.video.i_bits_per_pixel = 16;
 529         p_sys->ctx.src_params.chroma = format422;
 530         p_sys->i_buffer_in = p_enc->fmt_in.video.i_width * p_enc->fmt_in.video.i_height * 2;
 531     }
 532     else if( !strcmp( psz_tmp, "444" ) ) {
 533         p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','4','4');
 534         p_enc->fmt_in.video.i_bits_per_pixel = 24;
 535         p_sys->ctx.src_params.chroma = format444;
 536         p_sys->i_buffer_in = p_enc->fmt_in.video.i_width * p_enc->fmt_in.video.i_height * 3;
 537     }
 538     else {
 539         msg_Err( p_enc, "Invalid chroma format: %s", psz_tmp );
 540         free( psz_tmp );
 541         goto error;
 542     }
 543     free( psz_tmp );
 544
 545     p_sys->ctx.enc_params.qf = var_GetFloat( p_enc, ENC_CFG_PREFIX ENC_QUALITY_FACTOR );
 546
 547     /* use bitrate from sout-transcode-vb in kbps */
 548     p_sys->ctx.enc_params.trate = p_enc->fmt_out.i_bitrate / 1000;
 549     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_TARGETRATE );
 550     if( i_tmp > -1 )
 551         p_sys->ctx.enc_params.trate = i_tmp;
 552     p_enc->fmt_out.i_bitrate = p_sys->ctx.enc_params.trate * 1000;
 553
 554     p_sys->ctx.enc_params.lossless = var_GetBool( p_enc, ENC_CFG_PREFIX ENC_LOSSLESS );
 555
 556     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_PREFILTER );
 557     if( !psz_tmp )
 558         goto error;
 559     else if( !strcmp( psz_tmp, "none" ) ) {
 560         p_sys->ctx.enc_params.prefilter = NO_PF;
 561     }
 562     else if( !strcmp( psz_tmp, "cwm" ) ) {
 563         p_sys->ctx.enc_params.prefilter = CWM;
 564     }
 565     else if( !strcmp( psz_tmp, "rectlp" ) ) {
 566         p_sys->ctx.enc_params.prefilter = RECTLP;
 567     }
 568     else if( !strcmp( psz_tmp, "diaglp" ) ) {
 569         p_sys->ctx.enc_params.prefilter = DIAGLP;
 570     }
 571     else {
 572         msg_Err( p_enc, "Invalid prefilter: %s", psz_tmp );
 573         free( psz_tmp );
 574         goto error;
 575     }
 576     free( psz_tmp );
 577
 578     p_sys->ctx.enc_params.prefilter_strength =
 579         var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_PREFILTER_STRENGTH );
 580
 581     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_L1SEP );
 582     if( i_tmp > -1 )
 583         p_sys->ctx.enc_params.L1_sep = i_tmp;
 584
 585     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_L1NUM );
 586     if( i_tmp > -1 )
 587         p_sys->ctx.enc_params.num_L1 = i_tmp;
 588
 589     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_CODINGMODE );
 590     if( !psz_tmp )
 591         goto error;
 592     else if( !strcmp( psz_tmp, "auto" ) ) {
 593         p_sys->b_auto_field_coding = true;
 594     }
 595     else if( !strcmp( psz_tmp, "progressive" ) ) {
 596         p_sys->b_auto_field_coding = false;
 597         p_sys->ctx.enc_params.picture_coding_mode = 0;
 598     }
 599     else if( !strcmp( psz_tmp, "field" ) ) {
 600         p_sys->b_auto_field_coding = false;
 601         p_sys->ctx.enc_params.picture_coding_mode = 1;
 602     }
 603     else {
 604         msg_Err( p_enc, "Invalid codingmode: %s", psz_tmp );
 605         free( psz_tmp );
 606         goto error;
 607     }
 608     free( psz_tmp );
 609
 610     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_MVPREC );
 611     if( !psz_tmp )
 612         goto error;
 613     else if( !strcmp( psz_tmp, "1" ) ) {
 614         p_sys->ctx.enc_params.mv_precision = MV_PRECISION_PIXEL;
 615     }
 616     else if( !strcmp( psz_tmp, "1/2" ) ) {
 617         p_sys->ctx.enc_params.mv_precision = MV_PRECISION_HALF_PIXEL;
 618     }
 619     else if( !strcmp( psz_tmp, "1/4" ) ) {
 620         p_sys->ctx.enc_params.mv_precision = MV_PRECISION_QUARTER_PIXEL;
 621     }
 622     else if( !strcmp( psz_tmp, "1/8" ) ) {
 623         p_sys->ctx.enc_params.mv_precision = MV_PRECISION_EIGHTH_PIXEL;
 624     }
 625     else {
 626         msg_Err( p_enc, "Invalid mv-prec: %s", psz_tmp );
 627         free( psz_tmp );
 628         goto error;
 629     }
 630     free( psz_tmp );
 631
 632     /*
 633      * {x,y}b{len,sep} must be multiples of 4
 634      */
 635     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_WIDTH );
 636     if( i_tmp > -1 )
 637         p_sys->ctx.enc_params.xbsep = i_tmp / 4 * 4;
 638
 639     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_HEIGHT );
 640     if( i_tmp > -1 )
 641         p_sys->ctx.enc_params.ybsep = i_tmp / 4 * 4;
 642
 643     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_OVERLAP );
 644     if( i_tmp > -1 ) {
 645         p_sys->ctx.enc_params.xblen = p_sys->ctx.enc_params.xbsep * (100 + i_tmp) / 400 * 4;
 646         p_sys->ctx.enc_params.yblen = p_sys->ctx.enc_params.ybsep * (100 + i_tmp) / 400 * 4;
 647     }
 648
 649     /*
 650      * {x,y}blen >= {x,y}bsep
 651      * {x,y}blen <= 2* {x,y}bsep
 652      */
 653     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_XBLEN );
 654     if( i_tmp > -1 ) {
 655         int xblen = __MAX( i_tmp, p_sys->ctx.enc_params.xbsep );
 656         xblen = __MIN( xblen, 2 * p_sys->ctx.enc_params.xbsep );
 657         p_sys->ctx.enc_params.xblen = xblen;
 658     }
 659
 660     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_YBLEN );
 661     if( i_tmp > -1 ) {
 662         int yblen = __MAX( i_tmp, p_sys->ctx.enc_params.ybsep );
 663         yblen = __MIN( yblen, 2 * p_sys->ctx.enc_params.ybsep );
 664         p_sys->ctx.enc_params.yblen = yblen;
 665     }
 666
 667     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_ME_SIMPLESEARCH );
 668     if( !psz_tmp )
 669         goto error;
 670     if( *psz_tmp != '\0' ) {
 671         /* of the form [0-9]+:[0-9]+ */
 672         char *psz_start = psz_tmp;
 673         char *psz_end = psz_tmp;
 674         p_sys->ctx.enc_params.x_range_me = strtol(psz_start, &psz_end, 10);
 675         if( *psz_end != ':'  || psz_end == psz_start ) {
 676             msg_Err( p_enc, "Invalid simple search range: %s", psz_tmp );
 677             free( psz_tmp );
 678             goto error;
 679         }
 680         psz_start = ++psz_end;
 681         p_sys->ctx.enc_params.y_range_me = strtol(psz_start, &psz_end, 10);
 682         if( *psz_end != '\0'  || psz_end == psz_start ) {
 683             msg_Err( p_enc, "Invalid simple search range: %s", psz_tmp );
 684             free( psz_tmp );
 685             goto error;
 686         }
 687         if( p_sys->ctx.enc_params.x_range_me < 0 ||
 688             p_sys->ctx.enc_params.y_range_me < 0 )
 689         {
 690             msg_Err( p_enc, "Invalid negative simple search range: %s", psz_tmp );
 691             free( psz_tmp );
 692             goto error;
 693         }
 694         p_sys->ctx.enc_params.full_search = 1;
 695     }
 696     free( psz_tmp );
 697
 698 #if DIRAC_RESEARCH_VERSION_ATLEAST(1,0,1)
 699     p_sys->ctx.enc_params.combined_me = var_GetBool( p_enc, ENC_CFG_PREFIX ENC_ME_COMBINED );
 700 #endif
 701
 702     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_DWTINTRA );
 703     if( i_tmp > -1 )
 704         p_sys->ctx.enc_params.intra_wlt_filter = i_tmp;
 705
 706     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_DWTINTER );
 707     if( i_tmp > -1 )
 708         p_sys->ctx.enc_params.inter_wlt_filter = i_tmp;
 709
 710     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_DWTDEPTH );
 711     if( i_tmp > -1 )
 712         p_sys->ctx.enc_params.wlt_depth = i_tmp;
 713
 714     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MULTIQUANT );
 715     if( i_tmp > -1 )
 716         p_sys->ctx.enc_params.multi_quants = i_tmp;
 717
 718     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_SPARTITION );
 719     if( i_tmp > -1 )
 720         p_sys->ctx.enc_params.spatial_partition = i_tmp;
 721
 722     p_sys->ctx.enc_params.using_ac = !var_GetBool( p_enc, ENC_CFG_PREFIX ENC_NOAC );
 723
 724     f_tmp = var_GetFloat( p_enc, ENC_CFG_PREFIX ENC_CPD );
 725     if( f_tmp > -1 )
 726         p_sys->ctx.enc_params.cpd = f_tmp;
 727
 728     /* Allocate the buffer for inputing frames into the encoder */
 729     if( ( p_sys->p_buffer_in = malloc( p_sys->i_buffer_in ) ) == NULL )
 730     {
 731         CloseEncoder( p_this );
 732         return VLC_ENOMEM;
 733     }
 734
 735     /* Set up output buffer */
 736     /* Unfortunately it isn't possible to determine if the buffer
 737      * is too small (and then reallocate it) */
 738     p_sys->i_buffer_out = 4096 + p_sys->i_buffer_in;
 739     if( ( p_sys->p_buffer_out = malloc( p_sys->i_buffer_out ) ) == NULL )
 740     {
 741         CloseEncoder( p_this );
 742         return VLC_ENOMEM;
 743     }
 744
 745     return VLC_SUCCESS;
 746 error:
 747     CloseEncoder( p_this );
 748     return VLC_EGENERIC;
 749 }
 750
 751 /* Attempt to find dirac picture number in an encapsulation unit */
 752 static int ReadDiracPictureNumber( uint32_t *p_picnum, block_t *p_block )
 753 {
 754     uint32_t u_pos = 4;
 755     /* protect against falling off the edge */
 756     while( u_pos + 13 < p_block->i_buffer )
 757     {
 758         /* find the picture startcode */
 759         if( p_block->p_buffer[u_pos] & 0x08 )
 760         {
 761             *p_picnum = GetDWBE( p_block->p_buffer + u_pos + 9 );
 762             return 1;
 763         }
 764         /* skip to the next dirac data unit */
 765         uint32_t u_npo = GetDWBE( p_block->p_buffer + u_pos + 1 );
 766         assert( u_npo <= UINT32_MAX - u_pos );
 767         if( u_npo == 0 )
 768             u_npo = 13;
 769         u_pos += u_npo;
 770     }
 771     return 0;
 772 }
 773
 774 /****************************************************************************
 775  * Encode: the whole thing
 776  ****************************************************************************
 777  * This function spits out encapsulation units.
 778  ****************************************************************************/
 779 static block_t *Encode( encoder_t *p_enc, picture_t *p_pic )
 780 {
 781     encoder_sys_t *p_sys = p_enc->p_sys;
 782     block_t *p_block, *p_output_chain = NULL;
 783     int i_plane, i_line, i_width, i_src_stride;
 784     uint8_t *p_dst;
 785
 786     /* we only know if the sequence is interlaced when the first
 787      * picture arrives, so final setup is done here */
 788     /* XXX todo, detect change of interlace */
 789     p_sys->ctx.src_params.topfieldfirst = p_pic->b_top_field_first;
 790     p_sys->ctx.src_params.source_sampling = !p_pic->b_progressive;
 791
 792     if( p_sys->b_auto_field_coding )
 793         p_sys->ctx.enc_params.picture_coding_mode = !p_pic->b_progressive;
 794
 795     if( !p_sys->p_dirac )
 796     {
 797         date_t date;
 798         /* Initialise the encoder with the encoder context */
 799         p_sys->p_dirac = dirac_encoder_init( &p_sys->ctx, 0 );
 800         if( !p_sys->p_dirac )
 801         {
 802             msg_Err( p_enc, "Failed to initialize dirac encoder\n" );
 803             p_enc->b_error = 1;
 804             return NULL;
 805         }
 806         date_Init( &date, p_enc->fmt_in.video.i_frame_rate, p_enc->fmt_in.video.i_frame_rate_base );
 807 #if DIRAC_RESEARCH_VERSION_ATLEAST(1,0,2)
 808         int i_delayinpics = dirac_encoder_ptsoffset( p_sys->p_dirac );
 809         i_delayinpics /= p_sys->ctx.enc_params.picture_coding_mode + 1;
 810         date_Increment( &date, i_delayinpics );
 811 #else
 812         date_Increment( &date, 1 );
 813 #endif
 814         p_sys->i_pts_offset = date_Get( &date );
 815
 816         /* picture_coding_mode = 1 == FIELD_CODING, two pictures are produced
 817          * for each frame input. Calculate time between fields for offsetting
 818          * the second field later. */
 819         if( 1 == p_sys->ctx.enc_params.picture_coding_mode )
 820         {
 821             date_Set( &date, 0 );
 822             date_Increment( &date, 1 );
 823             p_sys->i_field_time = date_Get( &date ) / 2;
 824         }
 825     }
 826
 827     /* Copy input picture into encoder input buffer (stride by stride) */
 828     /* Would be lovely to just pass the picture in, but there is noway for the
 829      * library to free it */
 830     p_dst = p_sys->p_buffer_in;
 831     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 832     {
 833         uint8_t *p_src = p_pic->p[i_plane].p_pixels;
 834         i_width = p_pic->p[i_plane].i_visible_pitch;
 835         i_src_stride = p_pic->p[i_plane].i_pitch;
 836
 837         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 838         {
 839             vlc_memcpy( p_dst, p_src, i_width );
 840             p_dst += i_width;
 841             p_src += i_src_stride;
 842         }
 843     }
 844
 845     /* Load one frame of data into encoder */
 846     if( dirac_encoder_load( p_sys->p_dirac, p_sys->p_buffer_in,
 847                             p_sys->i_buffer_in ) < 0 )
 848     {
 849         msg_Dbg( p_enc, "dirac_encoder_load() error" );
 850         return NULL;
 851     }
 852
 853     /* store pts in a lookaside buffer, so that the same pts may
 854      * be used for the picture in coded order */
 855     StorePicturePTS( p_enc, p_sys->i_input_picnum, p_pic->date );
 856     p_sys->i_input_picnum++;
 857
 858     /* store dts in a queue, so that they appear in order in
 859      * coded order */
 860     p_block = block_New( p_enc, 1 );
 861     if( !p_block )
 862     {
 863         p_enc->b_error = 1;
 864         return NULL;
 865     }
 866     p_block->i_dts = p_pic->date - p_sys->i_pts_offset;
 867     block_FifoPut( p_sys->p_dts_fifo, p_block );
 868     p_block = NULL;
 869
 870     /* for field coding mode, insert an extra value into both the
 871      * pts lookaside buffer and dts queue, offset to correspond
 872      * to a one field delay. */
 873     if( 1 == p_sys->ctx.enc_params.picture_coding_mode )
 874     {
 875         StorePicturePTS( p_enc, p_sys->i_input_picnum, p_pic->date + p_sys->i_field_time );
 876         p_sys->i_input_picnum++;
 877
 878         p_block = block_New( p_enc, 1 );
 879         if( !p_block )
 880         {
 881             p_enc->b_error = 1;
 882             return NULL;
 883         }
 884         p_block->i_dts = p_pic->date - p_sys->i_pts_offset + p_sys->i_field_time;
 885         block_FifoPut( p_sys->p_dts_fifo, p_block );
 886         p_block = NULL;
 887     }
 888
 889     dirac_encoder_state_t state;
 890     /* Retrieve encoded frames from encoder */
 891     do
 892     {
 893         p_sys->p_dirac->enc_buf.buffer = p_sys->p_buffer_out;
 894         p_sys->p_dirac->enc_buf.size = p_sys->i_buffer_out;
 895         state = dirac_encoder_output( p_sys->p_dirac );
 896         switch( state )
 897         {
 898         case ENC_STATE_AVAIL: {
 899             uint32_t pic_num;
 900
 901             /* extract data from encoder temporary buffer. */
 902             p_block = block_New( p_enc, p_sys->p_dirac->enc_buf.size );
 903             if( !p_block )
 904             {
 905                 p_enc->b_error = 1;
 906                 return NULL;
 907             }
 908             memcpy( p_block->p_buffer, p_sys->p_dirac->enc_buf.buffer,
 909                     p_sys->p_dirac->enc_buf.size );
 910
 911             /* if some flags were set for a previous block, prevent
 912              * them from getting lost */
 913             if( p_sys->p_chain )
 914                 p_block->i_flags |= p_sys->p_chain->i_flags;
 915
 916             /* store all extracted blocks in a chain and gather up when an
 917              * entire encapsulation unit is avaliable (ends with a picture) */
 918             block_ChainAppend( &p_sys->p_chain, p_block );
 919
 920             /* Presence of a Sequence header indicates a seek point */
 921             if( 0 == p_block->p_buffer[4] )
 922             {
 923                 p_block->i_flags |= BLOCK_FLAG_TYPE_I;
 924
 925                 if( !p_enc->fmt_out.p_extra ) {
 926                     const uint8_t eos[] = { 'B','B','C','D',0x10,0,0,0,13,0,0,0,0 };
 927                     uint32_t len = GetDWBE( p_block->p_buffer + 5 );
 928                     /* if it hasn't been done so far, stash a copy of the
 929                      * sequence header for muxers such as ogg */
 930                     /* The OggDirac spec advises that a Dirac EOS DataUnit
 931                      * is appended to the sequence header to allow guard
 932                      * against poor streaming servers */
 933                     /* XXX, should this be done using the packetizer ? */
 934                     p_enc->fmt_out.p_extra = malloc( len + sizeof(eos) );
 935                     if( !p_enc->fmt_out.p_extra )
 936                     {
 937                         p_enc->b_error = 1;
 938                         return NULL;
 939                     }
 940                     memcpy( p_enc->fmt_out.p_extra, p_block->p_buffer, len);
 941                     memcpy( (uint8_t*)p_enc->fmt_out.p_extra + len, eos, sizeof(eos) );
 942                     SetDWBE( (uint8_t*)p_enc->fmt_out.p_extra + len + 10, len );
 943                     p_enc->fmt_out.i_extra = len + sizeof(eos);
 944                 }
 945             }
 946
 947             if( ReadDiracPictureNumber( &pic_num, p_block ) )
 948             {
 949                 /* Finding a picture terminates an ecapsulation unit, gather
 950                  * all data and output; use the next dts value queued up
 951                  * and find correct pts in the tlb */
 952                 p_block = block_FifoGet( p_sys->p_dts_fifo );
 953                 p_sys->p_chain->i_dts = p_block->i_dts;
 954                 p_sys->p_chain->i_pts = GetPicturePTS( p_enc, pic_num );
 955                 block_Release( p_block );
 956                 block_ChainAppend( &p_output_chain, block_ChainGather( p_sys->p_chain ) );
 957                 p_sys->p_chain = NULL;
 958             } else {
 959                 p_block = NULL;
 960             }
 961             break;
 962             }
 963
 964         case ENC_STATE_BUFFER:
 965             break;
 966         case ENC_STATE_INVALID:
 967         default:
 968             break;
 969         }
 970     } while( state == ENC_STATE_AVAIL );
 971
 972     return p_output_chain;
 973 }
 974
 975 /*****************************************************************************
 976  * CloseEncoder: dirac encoder destruction
 977  *****************************************************************************/
 978 static void CloseEncoder( vlc_object_t *p_this )
 979 {
 980     encoder_t *p_enc = (encoder_t *)p_this;
 981     encoder_sys_t *p_sys = p_enc->p_sys;
 982
 983     /* Free the encoder resources */
 984     if( p_sys->p_dirac )
 985         dirac_encoder_close( p_sys->p_dirac );
 986
 987     free( p_sys->p_buffer_in );
 988     free( p_sys->p_buffer_out );
 989
 990     if( p_sys->p_dts_fifo )
 991         block_FifoRelease( p_sys->p_dts_fifo );
 992     block_ChainRelease( p_sys->p_chain );
 993
 994     free( p_sys );
 995 }