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 #include <assert.h>
  39
  40 #include <vlc_common.h>
  41 #include <vlc_plugin.h>
  42 #include <vlc_codec.h>
  43 #include <vlc_sout.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                                    " separately 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 separate 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_shortname( "Dirac" )
 208     set_capability( "encoder", 100 )
 209     set_callbacks( OpenEncoder, CloseEncoder )
 210
 211     add_float( ENC_CFG_PREFIX ENC_QUALITY_FACTOR, 5.5,
 212                ENC_QUALITY_FACTOR_TEXT, ENC_QUALITY_FACTOR_LONGTEXT, false )
 213     change_float_range(0., 10.);
 214
 215     add_integer( ENC_CFG_PREFIX ENC_TARGETRATE, -1,
 216                  ENC_TARGETRATE_TEXT, ENC_TARGETRATE_LONGTEXT, false )
 217     change_integer_range(-1, INT_MAX);
 218
 219     add_bool( ENC_CFG_PREFIX ENC_LOSSLESS, false,
 220               ENC_LOSSLESS_TEXT, ENC_LOSSLESS_LONGTEXT, false )
 221
 222     add_string( ENC_CFG_PREFIX ENC_PREFILTER, "diaglp",
 223                 ENC_PREFILTER_TEXT, ENC_PREFILTER_LONGTEXT, false )
 224     change_string_list( enc_prefilter_list, enc_prefilter_list_text, 0 );
 225
 226     add_integer( ENC_CFG_PREFIX ENC_PREFILTER_STRENGTH, 1,
 227                  ENC_PREFILTER_STRENGTH_TEXT, ENC_PREFILTER_STRENGTH_LONGTEXT, false )
 228     change_integer_range(0, 10);
 229
 230     add_string( ENC_CFG_PREFIX ENC_CHROMAFMT, "420",
 231                 ENC_CHROMAFMT_TEXT, ENC_CHROMAFMT_LONGTEXT, false )
 232     change_string_list( enc_chromafmt_list, enc_chromafmt_list_text, 0 );
 233
 234     add_integer( ENC_CFG_PREFIX ENC_L1SEP, -1,
 235                  ENC_L1SEP_TEXT, ENC_L1SEP_LONGTEXT, false )
 236     change_integer_range(-1, INT_MAX);
 237
 238     add_integer( ENC_CFG_PREFIX ENC_L1NUM, -1,
 239                  ENC_L1NUM_TEXT, ENC_L1NUM_LONGTEXT, false )
 240     change_integer_range(-1, INT_MAX);
 241
 242     add_string( ENC_CFG_PREFIX ENC_CODINGMODE, "auto",
 243                 ENC_CODINGMODE_TEXT, ENC_CODINGMODE_LONGTEXT, false )
 244     change_string_list( enc_codingmode_list, enc_codingmode_list_text, 0 );
 245
 246     add_string( ENC_CFG_PREFIX ENC_MVPREC, "1/2",
 247                 ENC_MVPREC_TEXT, ENC_MVPREC_LONGTEXT, false )
 248     change_string_list( enc_mvprec_list, enc_mvprec_list, 0 );
 249
 250     add_integer( ENC_CFG_PREFIX ENC_MCBLK_WIDTH, -1,
 251                  ENC_MCBLK_WIDTH_TEXT, ENC_MCBLK_WIDTH_LONGTEXT, false )
 252     change_integer_range(-1, INT_MAX);
 253
 254     add_integer( ENC_CFG_PREFIX ENC_MCBLK_HEIGHT, -1,
 255                  ENC_MCBLK_HEIGHT, ENC_MCBLK_HEIGHT_LONGTEXT, false )
 256     change_integer_range(-1, INT_MAX);
 257
 258     add_integer( ENC_CFG_PREFIX ENC_MCBLK_OVERLAP, -1,
 259                  ENC_MCBLK_OVERLAP_TEXT, ENC_MCBLK_OVERLAP_LONGTEXT, false )
 260     change_integer_range(-1, 100);
 261
 262     /* advanced option only */
 263     add_integer( ENC_CFG_PREFIX ENC_MCBLK_XBLEN, -1,
 264                  ENC_MCBLK_XBLEN_TEXT, ENC_MCBLK_XBLEN_LONGTEXT, true )
 265     change_integer_range(-1, INT_MAX);
 266     /* advanced option only */
 267     add_integer( ENC_CFG_PREFIX ENC_MCBLK_YBLEN, -1,
 268                  ENC_MCBLK_YBLEN_TEXT, ENC_MCBLK_YBLEN_LONGTEXT, true )
 269     change_integer_range(-1, INT_MAX);
 270
 271     add_string( ENC_CFG_PREFIX ENC_ME_SIMPLESEARCH, "",
 272               ENC_ME_SIMPLESEARCH_TEXT, ENC_ME_SIMPLESEARCH_LONGTEXT, false )
 273
 274 #if DIRAC_RESEARCH_VERSION_ATLEAST(1,0,1)
 275     add_bool( ENC_CFG_PREFIX ENC_ME_COMBINED, true,
 276               ENC_ME_COMBINED_TEXT, ENC_ME_COMBINED_LONGTEXT, false )
 277 #endif
 278
 279     add_integer( ENC_CFG_PREFIX ENC_DWTINTRA, -1,
 280                  ENC_DWTINTRA_TEXT, ENC_DWTINTRA_LONGTEXT, false )
 281     change_integer_range(-1, 6);
 282
 283     add_integer( ENC_CFG_PREFIX ENC_DWTINTER, -1,
 284                  ENC_DWTINTER_TEXT, ENC_DWTINTER_LONGTEXT, false )
 285     change_integer_range(-1, 6);
 286
 287     add_integer( ENC_CFG_PREFIX ENC_DWTDEPTH, -1,
 288                  ENC_DWTDEPTH_TEXT, ENC_DWTDEPTH_LONGTEXT, false )
 289     change_integer_range(-1, 4);
 290
 291     /* advanced option only */
 292     /* NB, unforunately vlc doesn't have a concept of 'dont care' */
 293     add_integer( ENC_CFG_PREFIX ENC_MULTIQUANT, -1,
 294                  ENC_MULTIQUANT_TEXT, ENC_MULTIQUANT_LONGTEXT, true )
 295     change_integer_range(-1, 1);
 296
 297     /* advanced option only */
 298     /* NB, unforunately vlc doesn't have a concept of 'dont care' */
 299     add_integer( ENC_CFG_PREFIX ENC_SPARTITION, -1,
 300                  ENC_SPARTITION_TEXT, ENC_SPARTITION_LONGTEXT, true )
 301     change_integer_range(-1, 1);
 302
 303     add_bool( ENC_CFG_PREFIX ENC_NOAC, false,
 304               ENC_NOAC_TEXT, ENC_NOAC_LONGTEXT, false )
 305
 306     /* advanced option only */
 307     add_float( ENC_CFG_PREFIX ENC_CPD, -1,
 308                ENC_CPD_TEXT, ENC_CPD_LONGTEXT, true )
 309     change_integer_range(-1, INT_MAX);
 310 vlc_module_end()
 311
 312 /*****************************************************************************
 313  * picture_pts_t : store pts alongside picture number, not carried through
 314  * encoder
 315  *****************************************************************************/
 316 struct picture_pts_t
 317 {
 318    bool b_empty;      /* entry is invalid */
 319    uint32_t u_pnum;  /* dirac picture number */
 320    mtime_t i_pts;    /* associated pts */
 321 };
 322
 323 /*****************************************************************************
 324  * encoder_sys_t : dirac encoder descriptor
 325  *****************************************************************************/
 326 #define PTS_TLB_SIZE 256
 327 struct encoder_sys_t
 328 {
 329     dirac_encoder_t *p_dirac;
 330     dirac_encoder_context_t ctx;
 331     bool b_auto_field_coding;
 332
 333     uint8_t *p_buffer_in;
 334     int i_buffer_in;
 335     uint32_t i_input_picnum;
 336     block_fifo_t *p_dts_fifo;
 337
 338     int i_buffer_out;
 339     uint8_t *p_buffer_out;
 340     block_t *p_chain;
 341
 342     struct picture_pts_t pts_tlb[PTS_TLB_SIZE];
 343     mtime_t i_pts_offset;
 344     mtime_t i_field_time;
 345 };
 346
 347 static struct
 348 {
 349     unsigned int i_height;
 350     int i_approx_fps;
 351     VideoFormat i_vf;
 352 } dirac_format_guess[] = {
 353     /* Important: Keep this list ordered in ascending picture height */
 354     {1, 0, VIDEO_FORMAT_CUSTOM},
 355     {120, 15, VIDEO_FORMAT_QSIF525},
 356     {144, 12, VIDEO_FORMAT_QCIF},
 357     {240, 15, VIDEO_FORMAT_SIF525},
 358     {288, 12, VIDEO_FORMAT_CIF},
 359     {480, 30, VIDEO_FORMAT_SD_480I60},
 360     {480, 15, VIDEO_FORMAT_4SIF525},
 361     {576, 12, VIDEO_FORMAT_4CIF},
 362     {576, 25, VIDEO_FORMAT_SD_576I50},
 363     {720, 50, VIDEO_FORMAT_HD_720P50},
 364     {720, 60, VIDEO_FORMAT_HD_720P60},
 365     {1080, 24, VIDEO_FORMAT_DIGI_CINEMA_2K24},
 366     {1080, 25, VIDEO_FORMAT_HD_1080I50},
 367     {1080, 30, VIDEO_FORMAT_HD_1080I60},
 368     {1080, 50, VIDEO_FORMAT_HD_1080P50},
 369     {1080, 60, VIDEO_FORMAT_HD_1080P60},
 370     {2160, 24, VIDEO_FORMAT_DIGI_CINEMA_4K24},
 371     {2160, 50, VIDEO_FORMAT_UHDTV_4K50},
 372     {2160, 60, VIDEO_FORMAT_UHDTV_4K60},
 373     {3840, 50, VIDEO_FORMAT_UHDTV_8K50},
 374     {3840, 60, VIDEO_FORMAT_UHDTV_8K60},
 375     {0, 0, 0},
 376 };
 377
 378 /*****************************************************************************
 379  * ResetPTStlb: Purge all entries in @p_dec@'s PTS-tlb
 380  *****************************************************************************/
 381 static void ResetPTStlb( encoder_t *p_enc )
 382 {
 383     encoder_sys_t *p_sys = p_enc->p_sys;
 384     for( int i=0; i<PTS_TLB_SIZE; i++)
 385     {
 386         p_sys->pts_tlb[i].b_empty = true;
 387     }
 388 }
 389
 390 /*****************************************************************************
 391  * StorePicturePTS: Store the PTS value for a particular picture number
 392  *****************************************************************************/
 393 static void StorePicturePTS( encoder_t *p_enc, uint32_t u_pnum, mtime_t i_pts )
 394 {
 395     encoder_sys_t *p_sys = p_enc->p_sys;
 396
 397     for( int i=0; i<PTS_TLB_SIZE; i++ )
 398     {
 399         if( p_sys->pts_tlb[i].b_empty )
 400         {
 401             p_sys->pts_tlb[i].u_pnum = u_pnum;
 402             p_sys->pts_tlb[i].i_pts = i_pts;
 403             p_sys->pts_tlb[i].b_empty = false;
 404
 405             return;
 406         }
 407     }
 408
 409     msg_Err( p_enc, "Could not store PTS %"PRId64" for frame %u", i_pts, u_pnum );
 410 }
 411
 412 /*****************************************************************************
 413  * GetPicturePTS: Retrieve the PTS value for a particular picture number
 414  *****************************************************************************/
 415 static mtime_t GetPicturePTS( encoder_t *p_enc, uint32_t u_pnum )
 416 {
 417     encoder_sys_t *p_sys = p_enc->p_sys;
 418
 419     for( int i=0; i<PTS_TLB_SIZE; i++ )
 420     {
 421         if( !p_sys->pts_tlb[i].b_empty &&
 422             p_sys->pts_tlb[i].u_pnum == u_pnum )
 423         {
 424              p_sys->pts_tlb[i].b_empty = true;
 425              return p_sys->pts_tlb[i].i_pts;
 426         }
 427     }
 428
 429     msg_Err( p_enc, "Could not retrieve PTS for picture %u", u_pnum );
 430     return 0;
 431 }
 432
 433 /*****************************************************************************
 434  * OpenEncoder: probe the encoder and return score
 435  *****************************************************************************/
 436 static int OpenEncoder( vlc_object_t *p_this )
 437 {
 438     encoder_t *p_enc = (encoder_t *)p_this;
 439     encoder_sys_t *p_sys = p_enc->p_sys;
 440     int i_tmp;
 441     float f_tmp;
 442     char *psz_tmp;
 443
 444     if( p_enc->fmt_out.i_codec != VLC_CODEC_DIRAC &&
 445         !p_enc->b_force )
 446     {
 447         return VLC_EGENERIC;
 448     }
 449
 450     if( !p_enc->fmt_in.video.i_frame_rate || !p_enc->fmt_in.video.i_frame_rate_base ||
 451         !p_enc->fmt_in.video.i_height || !p_enc->fmt_in.video.i_width )
 452     {
 453         msg_Err( p_enc, "Framerate and picture dimensions must be non-zero" );
 454         return VLC_EGENERIC;
 455     }
 456
 457     /* Allocate the memory needed to store the decoder's structure */
 458     if( ( p_sys = calloc( 1, sizeof(*p_sys) ) ) == NULL )
 459         return VLC_ENOMEM;
 460
 461     p_enc->p_sys = p_sys;
 462     p_enc->pf_encode_video = Encode;
 463     p_enc->fmt_out.i_codec = VLC_CODEC_DIRAC;
 464     p_enc->fmt_out.i_cat = VIDEO_ES;
 465
 466     if( ( p_sys->p_dts_fifo = block_FifoNew() ) == NULL )
 467     {
 468         CloseEncoder( p_this );
 469         return VLC_ENOMEM;
 470     }
 471
 472     ResetPTStlb( p_enc );
 473
 474     /* guess the video format based upon number of lines and picture height */
 475     int i = 0;
 476     VideoFormat guessed_video_fmt = VIDEO_FORMAT_CUSTOM;
 477     /* Pick the dirac_video_format in this order of preference:
 478      *  1. an exact match in frame height and an approximate fps match
 479      *  2. the previous preset with a smaller number of lines.
 480      */
 481     do
 482     {
 483         if( dirac_format_guess[i].i_height > p_enc->fmt_in.video.i_height )
 484         {
 485             guessed_video_fmt = dirac_format_guess[i-1].i_vf;
 486             break;
 487         }
 488         if( dirac_format_guess[i].i_height != p_enc->fmt_in.video.i_height )
 489             continue;
 490         int src_fps = p_enc->fmt_in.video.i_frame_rate / p_enc->fmt_in.video.i_frame_rate_base;
 491         int delta_fps = abs( dirac_format_guess[i].i_approx_fps - src_fps );
 492         if( delta_fps > 2 )
 493             continue;
 494
 495         guessed_video_fmt = dirac_format_guess[i].i_vf;
 496         break;
 497     } while( dirac_format_guess[++i].i_height );
 498
 499     dirac_encoder_context_init( &p_sys->ctx, guessed_video_fmt );
 500
 501     /* constants set from the input video format */
 502     p_sys->ctx.src_params.width = p_enc->fmt_in.video.i_width;
 503     p_sys->ctx.src_params.height = p_enc->fmt_in.video.i_height;
 504     p_sys->ctx.src_params.frame_rate.numerator = p_enc->fmt_in.video.i_frame_rate;
 505     p_sys->ctx.src_params.frame_rate.denominator = p_enc->fmt_in.video.i_frame_rate_base;
 506     unsigned u_asr_num, u_asr_den;
 507     vlc_ureduce( &u_asr_num, &u_asr_den,
 508                  p_enc->fmt_in.video.i_sar_num,
 509                  p_enc->fmt_in.video.i_sar_den, 0 );
 510     p_sys->ctx.src_params.pix_asr.numerator = u_asr_num;
 511     p_sys->ctx.src_params.pix_asr.denominator = u_asr_den;
 512
 513     config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
 514
 515     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_CHROMAFMT );
 516     if( !psz_tmp )
 517         goto error;
 518     else if( !strcmp( psz_tmp, "420" ) ) {
 519         p_enc->fmt_in.i_codec = VLC_CODEC_I420;
 520         p_enc->fmt_in.video.i_bits_per_pixel = 12;
 521         p_sys->ctx.src_params.chroma = format420;
 522         p_sys->i_buffer_in = p_enc->fmt_in.video.i_width * p_enc->fmt_in.video.i_height * 3 / 2;
 523     }
 524     else if( !strcmp( psz_tmp, "422" ) ) {
 525         p_enc->fmt_in.i_codec = VLC_CODEC_I422;
 526         p_enc->fmt_in.video.i_bits_per_pixel = 16;
 527         p_sys->ctx.src_params.chroma = format422;
 528         p_sys->i_buffer_in = p_enc->fmt_in.video.i_width * p_enc->fmt_in.video.i_height * 2;
 529     }
 530     else if( !strcmp( psz_tmp, "444" ) ) {
 531         p_enc->fmt_in.i_codec = VLC_CODEC_I444;
 532         p_enc->fmt_in.video.i_bits_per_pixel = 24;
 533         p_sys->ctx.src_params.chroma = format444;
 534         p_sys->i_buffer_in = p_enc->fmt_in.video.i_width * p_enc->fmt_in.video.i_height * 3;
 535     }
 536     else {
 537         msg_Err( p_enc, "Invalid chroma format: %s", psz_tmp );
 538         free( psz_tmp );
 539         goto error;
 540     }
 541     free( psz_tmp );
 542
 543     p_sys->ctx.enc_params.qf = var_GetFloat( p_enc, ENC_CFG_PREFIX ENC_QUALITY_FACTOR );
 544
 545     /* use bitrate from sout-transcode-vb in kbps */
 546     p_sys->ctx.enc_params.trate = p_enc->fmt_out.i_bitrate / 1000;
 547     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_TARGETRATE );
 548     if( i_tmp > -1 )
 549         p_sys->ctx.enc_params.trate = i_tmp;
 550     p_enc->fmt_out.i_bitrate = p_sys->ctx.enc_params.trate * 1000;
 551
 552     p_sys->ctx.enc_params.lossless = var_GetBool( p_enc, ENC_CFG_PREFIX ENC_LOSSLESS );
 553
 554     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_PREFILTER );
 555     if( !psz_tmp )
 556         goto error;
 557     else if( !strcmp( psz_tmp, "none" ) ) {
 558         p_sys->ctx.enc_params.prefilter = NO_PF;
 559     }
 560     else if( !strcmp( psz_tmp, "cwm" ) ) {
 561         p_sys->ctx.enc_params.prefilter = CWM;
 562     }
 563     else if( !strcmp( psz_tmp, "rectlp" ) ) {
 564         p_sys->ctx.enc_params.prefilter = RECTLP;
 565     }
 566     else if( !strcmp( psz_tmp, "diaglp" ) ) {
 567         p_sys->ctx.enc_params.prefilter = DIAGLP;
 568     }
 569     else {
 570         msg_Err( p_enc, "Invalid prefilter: %s", psz_tmp );
 571         free( psz_tmp );
 572         goto error;
 573     }
 574     free( psz_tmp );
 575
 576     p_sys->ctx.enc_params.prefilter_strength =
 577         var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_PREFILTER_STRENGTH );
 578
 579     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_L1SEP );
 580     if( i_tmp > -1 )
 581         p_sys->ctx.enc_params.L1_sep = i_tmp;
 582
 583     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_L1NUM );
 584     if( i_tmp > -1 )
 585         p_sys->ctx.enc_params.num_L1 = i_tmp;
 586
 587     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_CODINGMODE );
 588     if( !psz_tmp )
 589         goto error;
 590     else if( !strcmp( psz_tmp, "auto" ) ) {
 591         p_sys->b_auto_field_coding = true;
 592     }
 593     else if( !strcmp( psz_tmp, "progressive" ) ) {
 594         p_sys->b_auto_field_coding = false;
 595         p_sys->ctx.enc_params.picture_coding_mode = 0;
 596     }
 597     else if( !strcmp( psz_tmp, "field" ) ) {
 598         p_sys->b_auto_field_coding = false;
 599         p_sys->ctx.enc_params.picture_coding_mode = 1;
 600     }
 601     else {
 602         msg_Err( p_enc, "Invalid codingmode: %s", psz_tmp );
 603         free( psz_tmp );
 604         goto error;
 605     }
 606     free( psz_tmp );
 607
 608     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_MVPREC );
 609     if( !psz_tmp )
 610         goto error;
 611     else if( !strcmp( psz_tmp, "1" ) ) {
 612         p_sys->ctx.enc_params.mv_precision = MV_PRECISION_PIXEL;
 613     }
 614     else if( !strcmp( psz_tmp, "1/2" ) ) {
 615         p_sys->ctx.enc_params.mv_precision = MV_PRECISION_HALF_PIXEL;
 616     }
 617     else if( !strcmp( psz_tmp, "1/4" ) ) {
 618         p_sys->ctx.enc_params.mv_precision = MV_PRECISION_QUARTER_PIXEL;
 619     }
 620     else if( !strcmp( psz_tmp, "1/8" ) ) {
 621         p_sys->ctx.enc_params.mv_precision = MV_PRECISION_EIGHTH_PIXEL;
 622     }
 623     else {
 624         msg_Err( p_enc, "Invalid mv-prec: %s", psz_tmp );
 625         free( psz_tmp );
 626         goto error;
 627     }
 628     free( psz_tmp );
 629
 630     /*
 631      * {x,y}b{len,sep} must be multiples of 4
 632      */
 633     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_WIDTH );
 634     if( i_tmp > -1 )
 635         p_sys->ctx.enc_params.xbsep = i_tmp / 4 * 4;
 636
 637     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_HEIGHT );
 638     if( i_tmp > -1 )
 639         p_sys->ctx.enc_params.ybsep = i_tmp / 4 * 4;
 640
 641     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_OVERLAP );
 642     if( i_tmp > -1 ) {
 643         p_sys->ctx.enc_params.xblen = p_sys->ctx.enc_params.xbsep * (100 + i_tmp) / 400 * 4;
 644         p_sys->ctx.enc_params.yblen = p_sys->ctx.enc_params.ybsep * (100 + i_tmp) / 400 * 4;
 645     }
 646
 647     /*
 648      * {x,y}blen >= {x,y}bsep
 649      * {x,y}blen <= 2* {x,y}bsep
 650      */
 651     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_XBLEN );
 652     if( i_tmp > -1 ) {
 653         int xblen = __MAX( i_tmp, p_sys->ctx.enc_params.xbsep );
 654         xblen = __MIN( xblen, 2 * p_sys->ctx.enc_params.xbsep );
 655         p_sys->ctx.enc_params.xblen = xblen;
 656     }
 657
 658     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MCBLK_YBLEN );
 659     if( i_tmp > -1 ) {
 660         int yblen = __MAX( i_tmp, p_sys->ctx.enc_params.ybsep );
 661         yblen = __MIN( yblen, 2 * p_sys->ctx.enc_params.ybsep );
 662         p_sys->ctx.enc_params.yblen = yblen;
 663     }
 664
 665     psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX ENC_ME_SIMPLESEARCH );
 666     if( !psz_tmp )
 667         goto error;
 668     if( *psz_tmp != '\0' ) {
 669         /* of the form [0-9]+:[0-9]+ */
 670         char *psz_start = psz_tmp;
 671         char *psz_end = psz_tmp;
 672         p_sys->ctx.enc_params.x_range_me = strtol(psz_start, &psz_end, 10);
 673         if( *psz_end != ':'  || psz_end == psz_start ) {
 674             msg_Err( p_enc, "Invalid simple search range: %s", psz_tmp );
 675             free( psz_tmp );
 676             goto error;
 677         }
 678         psz_start = ++psz_end;
 679         p_sys->ctx.enc_params.y_range_me = strtol(psz_start, &psz_end, 10);
 680         if( *psz_end != '\0'  || psz_end == psz_start ) {
 681             msg_Err( p_enc, "Invalid simple search range: %s", psz_tmp );
 682             free( psz_tmp );
 683             goto error;
 684         }
 685         if( p_sys->ctx.enc_params.x_range_me < 0 ||
 686             p_sys->ctx.enc_params.y_range_me < 0 )
 687         {
 688             msg_Err( p_enc, "Invalid negative simple search range: %s", psz_tmp );
 689             free( psz_tmp );
 690             goto error;
 691         }
 692         p_sys->ctx.enc_params.full_search = 1;
 693     }
 694     free( psz_tmp );
 695
 696 #if DIRAC_RESEARCH_VERSION_ATLEAST(1,0,1)
 697     p_sys->ctx.enc_params.combined_me = var_GetBool( p_enc, ENC_CFG_PREFIX ENC_ME_COMBINED );
 698 #endif
 699
 700     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_DWTINTRA );
 701     if( i_tmp > -1 )
 702         p_sys->ctx.enc_params.intra_wlt_filter = i_tmp;
 703
 704     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_DWTINTER );
 705     if( i_tmp > -1 )
 706         p_sys->ctx.enc_params.inter_wlt_filter = i_tmp;
 707
 708     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_DWTDEPTH );
 709     if( i_tmp > -1 )
 710         p_sys->ctx.enc_params.wlt_depth = i_tmp;
 711
 712     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_MULTIQUANT );
 713     if( i_tmp > -1 )
 714         p_sys->ctx.enc_params.multi_quants = i_tmp;
 715
 716     i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX ENC_SPARTITION );
 717     if( i_tmp > -1 )
 718         p_sys->ctx.enc_params.spatial_partition = i_tmp;
 719
 720     p_sys->ctx.enc_params.using_ac = !var_GetBool( p_enc, ENC_CFG_PREFIX ENC_NOAC );
 721
 722     f_tmp = var_GetFloat( p_enc, ENC_CFG_PREFIX ENC_CPD );
 723     if( f_tmp > -1 )
 724         p_sys->ctx.enc_params.cpd = f_tmp;
 725
 726     /* Allocate the buffer for inputing frames into the encoder */
 727     if( ( p_sys->p_buffer_in = malloc( p_sys->i_buffer_in ) ) == NULL )
 728     {
 729         CloseEncoder( p_this );
 730         return VLC_ENOMEM;
 731     }
 732
 733     /* Set up output buffer */
 734     /* Unfortunately it isn't possible to determine if the buffer
 735      * is too small (and then reallocate it) */
 736     p_sys->i_buffer_out = 4096 + p_sys->i_buffer_in;
 737     if( ( p_sys->p_buffer_out = malloc( p_sys->i_buffer_out ) ) == NULL )
 738     {
 739         CloseEncoder( p_this );
 740         return VLC_ENOMEM;
 741     }
 742
 743     return VLC_SUCCESS;
 744 error:
 745     CloseEncoder( p_this );
 746     return VLC_EGENERIC;
 747 }
 748
 749 /* Attempt to find dirac picture number in an encapsulation unit */
 750 static int ReadDiracPictureNumber( uint32_t *p_picnum, block_t *p_block )
 751 {
 752     uint32_t u_pos = 4;
 753     /* protect against falling off the edge */
 754     while( u_pos + 13 < p_block->i_buffer )
 755     {
 756         /* find the picture startcode */
 757         if( p_block->p_buffer[u_pos] & 0x08 )
 758         {
 759             *p_picnum = GetDWBE( p_block->p_buffer + u_pos + 9 );
 760             return 1;
 761         }
 762         /* skip to the next dirac data unit */
 763         uint32_t u_npo = GetDWBE( p_block->p_buffer + u_pos + 1 );
 764         assert( u_npo <= UINT32_MAX - u_pos );
 765         if( u_npo == 0 )
 766             u_npo = 13;
 767         u_pos += u_npo;
 768     }
 769     return 0;
 770 }
 771
 772 /****************************************************************************
 773  * Encode: the whole thing
 774  ****************************************************************************
 775  * This function spits out encapsulation units.
 776  ****************************************************************************/
 777 static block_t *Encode( encoder_t *p_enc, picture_t *p_pic )
 778 {
 779     encoder_sys_t *p_sys = p_enc->p_sys;
 780     block_t *p_block, *p_output_chain = NULL;
 781     int i_plane, i_line, i_width, i_src_stride;
 782     uint8_t *p_dst;
 783
 784     if( !p_pic ) return NULL;
 785     /* we only know if the sequence is interlaced when the first
 786      * picture arrives, so final setup is done here */
 787     /* XXX todo, detect change of interlace */
 788     p_sys->ctx.src_params.topfieldfirst = p_pic->b_top_field_first;
 789     p_sys->ctx.src_params.source_sampling = !p_pic->b_progressive;
 790
 791     if( p_sys->b_auto_field_coding )
 792         p_sys->ctx.enc_params.picture_coding_mode = !p_pic->b_progressive;
 793
 794     if( !p_sys->p_dirac )
 795     {
 796         date_t date;
 797         /* Initialise the encoder with the encoder context */
 798         p_sys->p_dirac = dirac_encoder_init( &p_sys->ctx, 0 );
 799         if( !p_sys->p_dirac )
 800         {
 801             msg_Err( p_enc, "Failed to initialize dirac encoder" );
 802             return NULL;
 803         }
 804         date_Init( &date, p_enc->fmt_in.video.i_frame_rate, p_enc->fmt_in.video.i_frame_rate_base );
 805 #if DIRAC_RESEARCH_VERSION_ATLEAST(1,0,2)
 806         int i_delayinpics = dirac_encoder_pts_offset( p_sys->p_dirac );
 807         i_delayinpics /= p_sys->ctx.enc_params.picture_coding_mode + 1;
 808         date_Increment( &date, i_delayinpics );
 809 #else
 810         date_Increment( &date, 1 );
 811 #endif
 812         p_sys->i_pts_offset = date_Get( &date );
 813
 814         /* picture_coding_mode = 1 == FIELD_CODING, two pictures are produced
 815          * for each frame input. Calculate time between fields for offsetting
 816          * the second field later. */
 817         if( 1 == p_sys->ctx.enc_params.picture_coding_mode )
 818         {
 819             date_Set( &date, 0 );
 820             date_Increment( &date, 1 );
 821             p_sys->i_field_time = date_Get( &date ) / 2;
 822         }
 823     }
 824
 825     /* Copy input picture into encoder input buffer (stride by stride) */
 826     /* Would be lovely to just pass the picture in, but there is noway for the
 827      * library to free it */
 828     p_dst = p_sys->p_buffer_in;
 829     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 830     {
 831         uint8_t *p_src = p_pic->p[i_plane].p_pixels;
 832         i_width = p_pic->p[i_plane].i_visible_pitch;
 833         i_src_stride = p_pic->p[i_plane].i_pitch;
 834
 835         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 836         {
 837             vlc_memcpy( p_dst, p_src, i_width );
 838             p_dst += i_width;
 839             p_src += i_src_stride;
 840         }
 841     }
 842
 843     /* Load one frame of data into encoder */
 844     if( dirac_encoder_load( p_sys->p_dirac, p_sys->p_buffer_in,
 845                             p_sys->i_buffer_in ) < 0 )
 846     {
 847         msg_Dbg( p_enc, "dirac_encoder_load() error" );
 848         return NULL;
 849     }
 850
 851     /* store pts in a lookaside buffer, so that the same pts may
 852      * be used for the picture in coded order */
 853     StorePicturePTS( p_enc, p_sys->i_input_picnum, p_pic->date );
 854     p_sys->i_input_picnum++;
 855
 856     /* store dts in a queue, so that they appear in order in
 857      * coded order */
 858     p_block = block_New( p_enc, 1 );
 859     if( !p_block )
 860         return NULL;
 861     p_block->i_dts = p_pic->date - p_sys->i_pts_offset;
 862     block_FifoPut( p_sys->p_dts_fifo, p_block );
 863     p_block = NULL;
 864
 865     /* for field coding mode, insert an extra value into both the
 866      * pts lookaside buffer and dts queue, offset to correspond
 867      * to a one field delay. */
 868     if( 1 == p_sys->ctx.enc_params.picture_coding_mode )
 869     {
 870         StorePicturePTS( p_enc, p_sys->i_input_picnum, p_pic->date + p_sys->i_field_time );
 871         p_sys->i_input_picnum++;
 872
 873         p_block = block_New( p_enc, 1 );
 874         if( !p_block )
 875             return NULL;
 876         p_block->i_dts = p_pic->date - p_sys->i_pts_offset + p_sys->i_field_time;
 877         block_FifoPut( p_sys->p_dts_fifo, p_block );
 878         p_block = NULL;
 879     }
 880
 881     dirac_encoder_state_t state;
 882     /* Retrieve encoded frames from encoder */
 883     do
 884     {
 885         p_sys->p_dirac->enc_buf.buffer = p_sys->p_buffer_out;
 886         p_sys->p_dirac->enc_buf.size = p_sys->i_buffer_out;
 887         state = dirac_encoder_output( p_sys->p_dirac );
 888         switch( state )
 889         {
 890         case ENC_STATE_AVAIL: {
 891             uint32_t pic_num;
 892
 893             /* extract data from encoder temporary buffer. */
 894             p_block = block_New( p_enc, p_sys->p_dirac->enc_buf.size );
 895             if( !p_block )
 896                 return NULL;
 897             memcpy( p_block->p_buffer, p_sys->p_dirac->enc_buf.buffer,
 898                     p_sys->p_dirac->enc_buf.size );
 899
 900             /* if some flags were set for a previous block, prevent
 901              * them from getting lost */
 902             if( p_sys->p_chain )
 903                 p_block->i_flags |= p_sys->p_chain->i_flags;
 904
 905             /* store all extracted blocks in a chain and gather up when an
 906              * entire encapsulation unit is avaliable (ends with a picture) */
 907             block_ChainAppend( &p_sys->p_chain, p_block );
 908
 909             /* Presence of a Sequence header indicates a seek point */
 910             if( 0 == p_block->p_buffer[4] )
 911             {
 912                 p_block->i_flags |= BLOCK_FLAG_TYPE_I;
 913
 914                 if( !p_enc->fmt_out.p_extra ) {
 915                     const uint8_t eos[] = { 'B','B','C','D',0x10,0,0,0,13,0,0,0,0 };
 916                     uint32_t len = GetDWBE( p_block->p_buffer + 5 );
 917                     /* if it hasn't been done so far, stash a copy of the
 918                      * sequence header for muxers such as ogg */
 919                     /* The OggDirac spec advises that a Dirac EOS DataUnit
 920                      * is appended to the sequence header to allow guard
 921                      * against poor streaming servers */
 922                     /* XXX, should this be done using the packetizer ? */
 923                     p_enc->fmt_out.p_extra = malloc( len + sizeof(eos) );
 924                     if( !p_enc->fmt_out.p_extra )
 925                         return NULL;
 926                     memcpy( p_enc->fmt_out.p_extra, p_block->p_buffer, len);
 927                     memcpy( (uint8_t*)p_enc->fmt_out.p_extra + len, eos, sizeof(eos) );
 928                     SetDWBE( (uint8_t*)p_enc->fmt_out.p_extra + len + 10, len );
 929                     p_enc->fmt_out.i_extra = len + sizeof(eos);
 930                 }
 931             }
 932
 933             if( ReadDiracPictureNumber( &pic_num, p_block ) )
 934             {
 935                 /* Finding a picture terminates an ecapsulation unit, gather
 936                  * all data and output; use the next dts value queued up
 937                  * and find correct pts in the tlb */
 938                 p_block = block_FifoGet( p_sys->p_dts_fifo );
 939                 p_sys->p_chain->i_dts = p_block->i_dts;
 940                 p_sys->p_chain->i_pts = GetPicturePTS( p_enc, pic_num );
 941                 block_Release( p_block );
 942                 block_ChainAppend( &p_output_chain, block_ChainGather( p_sys->p_chain ) );
 943                 p_sys->p_chain = NULL;
 944             } else {
 945                 p_block = NULL;
 946             }
 947             break;
 948             }
 949
 950         case ENC_STATE_BUFFER:
 951             break;
 952         case ENC_STATE_INVALID:
 953         default:
 954             break;
 955         }
 956     } while( state == ENC_STATE_AVAIL );
 957
 958     return p_output_chain;
 959 }
 960
 961 /*****************************************************************************
 962  * CloseEncoder: dirac encoder destruction
 963  *****************************************************************************/
 964 static void CloseEncoder( vlc_object_t *p_this )
 965 {
 966     encoder_t *p_enc = (encoder_t *)p_this;
 967     encoder_sys_t *p_sys = p_enc->p_sys;
 968
 969     /* Free the encoder resources */
 970     if( p_sys->p_dirac )
 971         dirac_encoder_close( p_sys->p_dirac );
 972
 973     free( p_sys->p_buffer_in );
 974     free( p_sys->p_buffer_out );
 975
 976     if( p_sys->p_dts_fifo )
 977         block_FifoRelease( p_sys->p_dts_fifo );
 978     block_ChainRelease( p_sys->p_chain );
 979
 980     free( p_sys );
 981 }