modules/codec/daala.c

   1 /*****************************************************************************
   2  * daala.c: daala codec module making use of libdaala.
   3  *****************************************************************************
   4  * Copyright (C) 2014 VLC authors and VideoLAN
   5  *
   6  * Authors: Tristan Matthews <le.businessman@gmail.com>
   7  *   * Based on theora.c by: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_plugin.h>
  33 #include <vlc_codec.h>
  34 #include <vlc_input.h>
  35 #include "../demux/xiph.h"
  36
  37 #include <daala/codec.h>
  38 #include <daala/daaladec.h>
  39 #ifdef ENABLE_SOUT
  40 #include <daala/daalaenc.h>
  41 #endif
  42
  43 #include <limits.h>
  44
  45 /*****************************************************************************
  46  * decoder_sys_t : daala decoder descriptor
  47  *****************************************************************************/
  48 struct decoder_sys_t
  49 {
  50     /* Module mode */
  51     bool b_packetizer;
  52
  53     /*
  54      * Input properties
  55      */
  56     bool b_has_headers;
  57
  58     /*
  59      * Daala properties
  60      */
  61     daala_info          di;       /* daala bitstream settings */
  62     daala_comment       dc;       /* daala comment information */
  63     daala_dec_ctx       *dcx;     /* daala decoder context */
  64
  65     /*
  66      * Decoding properties
  67      */
  68     bool b_decoded_first_keyframe;
  69
  70     /*
  71      * Common properties
  72      */
  73     mtime_t i_pts;
  74 };
  75
  76 /*****************************************************************************
  77  * Local prototypes
  78  *****************************************************************************/
  79 static int  OpenDecoder   ( vlc_object_t * );
  80 static int  OpenPacketizer( vlc_object_t * );
  81 static void CloseDecoder  ( vlc_object_t * );
  82
  83 static void *DecodeBlock  ( decoder_t *, block_t ** );
  84 static int  ProcessHeaders( decoder_t * );
  85 static void *ProcessPacket ( decoder_t *, daala_packet *, block_t ** );
  86
  87 static picture_t *DecodePacket( decoder_t *, daala_packet * );
  88
  89 static void ParseDaalaComments( decoder_t * );
  90 static void daala_CopyPicture( picture_t *, daala_image * );
  91
  92 #ifdef ENABLE_SOUT
  93 static int  OpenEncoder( vlc_object_t *p_this );
  94 static void CloseEncoder( vlc_object_t *p_this );
  95 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
  96
  97 static const char *const enc_chromafmt_list[] = {
  98     "420", "444"
  99 };
 100 static const char *const enc_chromafmt_list_text[] = {
 101     "4:2:0", "4:4:4"
 102 };
 103 #endif
 104
 105 /*****************************************************************************
 106  * Module descriptor
 107  *****************************************************************************/
 108 #define ENC_QUALITY_TEXT N_("Encoding quality")
 109 #define ENC_QUALITY_LONGTEXT N_( \
 110   "Enforce a quality between 0 (lossless) and 511 (worst)." )
 111 #define ENC_KEYINT_TEXT N_("Keyframe interval")
 112 #define ENC_KEYINT_LONGTEXT N_( \
 113   "Enforce a keyframe interval between 1 and 1000." )
 114
 115 vlc_module_begin ()
 116     set_category( CAT_INPUT )
 117     set_subcategory( SUBCAT_INPUT_VCODEC )
 118     set_shortname( "Daala" )
 119     set_description( N_("Daala video decoder") )
 120     set_capability( "decoder", 100 )
 121     set_callbacks( OpenDecoder, CloseDecoder )
 122     add_shortcut( "daala" )
 123     add_submodule ()
 124     set_description( N_("Daala video packetizer") )
 125     set_capability( "packetizer", 100 )
 126     set_callbacks( OpenPacketizer, CloseDecoder )
 127     add_shortcut( "daala" )
 128
 129 #ifdef ENABLE_SOUT
 130     add_submodule ()
 131     set_description( N_("Daala video encoder") )
 132     set_capability( "encoder", 150 )
 133     set_callbacks( OpenEncoder, CloseEncoder )
 134     add_shortcut( "daala" )
 135
 136 #   define ENC_CFG_PREFIX "sout-daala-"
 137     add_integer_with_range( ENC_CFG_PREFIX "quality", 30, 0, 511,
 138                  ENC_QUALITY_TEXT, ENC_QUALITY_LONGTEXT, false )
 139     add_integer_with_range( ENC_CFG_PREFIX "keyint", 256, 1, 1000,
 140                  ENC_KEYINT_TEXT, ENC_KEYINT_LONGTEXT, false )
 141
 142 #   define ENC_CHROMAFMT_TEXT N_("Chroma format")
 143 #   define ENC_CHROMAFMT_LONGTEXT N_("Picking chroma format will force a " \
 144                                      "conversion of the video into that format")
 145
 146     add_string( ENC_CFG_PREFIX "chroma-fmt", "420", ENC_CHROMAFMT_TEXT,
 147                 ENC_CHROMAFMT_LONGTEXT, false )
 148     change_string_list( enc_chromafmt_list, enc_chromafmt_list_text )
 149 vlc_module_end ()
 150
 151 static const char *const ppsz_enc_options[] = {
 152     "quality", "keyint", "chroma-fmt", NULL
 153 };
 154 #endif
 155
 156 /*****************************************************************************
 157  * OpenDecoder: probe the decoder and return score
 158  *****************************************************************************/
 159 static int OpenDecoder( vlc_object_t *p_this )
 160 {
 161     decoder_t *p_dec = (decoder_t*)p_this;
 162     decoder_sys_t *p_sys;
 163
 164     if( p_dec->fmt_in.i_codec != VLC_CODEC_DAALA )
 165     {
 166         return VLC_EGENERIC;
 167     }
 168
 169     /* Allocate the memory needed to store the decoder's structure */
 170     p_sys = malloc(sizeof(*p_sys));
 171     if( p_sys == NULL )
 172         return VLC_ENOMEM;
 173
 174     p_dec->p_sys = p_sys;
 175     p_dec->p_sys->b_packetizer = false;
 176     p_sys->b_has_headers = false;
 177     p_sys->i_pts = VLC_TS_INVALID;
 178     p_sys->b_decoded_first_keyframe = false;
 179     p_sys->dcx = NULL;
 180
 181     /* Set output properties */
 182     p_dec->fmt_out.i_cat = VIDEO_ES;
 183     p_dec->fmt_out.i_codec = VLC_CODEC_I420;
 184
 185     /* Set callbacks */
 186     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 187         DecodeBlock;
 188     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 189         DecodeBlock;
 190
 191     /* Init supporting Daala structures needed in header parsing */
 192     daala_comment_init( &p_sys->dc );
 193     daala_info_init( &p_sys->di );
 194
 195     return VLC_SUCCESS;
 196 }
 197
 198 static int OpenPacketizer( vlc_object_t *p_this )
 199 {
 200     decoder_t *p_dec = (decoder_t*)p_this;
 201
 202     int i_ret = OpenDecoder( p_this );
 203
 204     if( i_ret == VLC_SUCCESS )
 205     {
 206         p_dec->p_sys->b_packetizer = true;
 207         p_dec->fmt_out.i_codec = VLC_CODEC_DAALA;
 208     }
 209
 210     return i_ret;
 211 }
 212
 213 /****************************************************************************
 214  * DecodeBlock: the whole thing
 215  ****************************************************************************
 216  * This function must be fed with Daala packets.
 217  ****************************************************************************/
 218 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 219 {
 220     decoder_sys_t *p_sys = p_dec->p_sys;
 221     block_t *p_block;
 222     daala_packet dpacket;
 223
 224     if( !pp_block || !*pp_block ) return NULL;
 225
 226     p_block = *pp_block;
 227
 228     /* Block to Daala packet */
 229     dpacket.packet = p_block->p_buffer;
 230     dpacket.bytes = p_block->i_buffer;
 231     dpacket.granulepos = p_block->i_dts;
 232     dpacket.b_o_s = 0;
 233     dpacket.e_o_s = 0;
 234     dpacket.packetno = 0;
 235
 236     /* Check for headers */
 237     if( !p_sys->b_has_headers )
 238     {
 239         if( ProcessHeaders( p_dec ) )
 240         {
 241             block_Release( p_block );
 242             return NULL;
 243         }
 244         p_sys->b_has_headers = true;
 245     }
 246
 247     /* If we haven't seen a single keyframe yet, set to preroll,
 248      * otherwise we'll get display artifacts.  (This is impossible
 249      * in the general case, but can happen if e.g. we play a network stream
 250      * using a timed URL, such that the server doesn't start the video with a
 251      * keyframe). */
 252     if( !p_sys->b_decoded_first_keyframe )
 253         p_block->i_flags |= BLOCK_FLAG_PREROLL; /* Wait until we've decoded the first keyframe */
 254
 255     return ProcessPacket( p_dec, &dpacket, pp_block );
 256 }
 257
 258 /*****************************************************************************
 259  * ProcessHeaders: process Daala headers.
 260  *****************************************************************************/
 261 static int ProcessHeaders( decoder_t *p_dec )
 262 {
 263     int ret = VLC_SUCCESS;
 264     decoder_sys_t *p_sys = p_dec->p_sys;
 265     daala_packet dpacket;
 266     daala_setup_info *ds = NULL; /* daala setup information */
 267
 268     unsigned pi_size[XIPH_MAX_HEADER_COUNT];
 269     void     *pp_data[XIPH_MAX_HEADER_COUNT];
 270     unsigned i_count;
 271     if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
 272                            p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) )
 273         return VLC_EGENERIC;
 274     if( i_count < 3 )
 275         return VLC_EGENERIC;
 276
 277     dpacket.granulepos = -1;
 278     dpacket.e_o_s = 0;
 279     dpacket.packetno = 0;
 280
 281     /* Take care of the initial info header */
 282     dpacket.b_o_s  = 1; /* yes this actually is a b_o_s packet :) */
 283     dpacket.bytes  = pi_size[0];
 284     dpacket.packet = pp_data[0];
 285     if( daala_decode_header_in( &p_sys->di, &p_sys->dc, &ds, &dpacket ) < 0 )
 286     {
 287         msg_Err( p_dec, "this bitstream does not contain Daala video data" );
 288         ret = VLC_EGENERIC;
 289         goto cleanup;
 290     }
 291
 292     /* Set output properties */
 293     if( !p_sys->b_packetizer )
 294     {
 295         if( p_sys->di.plane_info[0].xdec == 0 && p_sys->di.plane_info[0].ydec == 0 &&
 296             p_sys->di.plane_info[1].xdec == 1 && p_sys->di.plane_info[1].ydec == 1 &&
 297             p_sys->di.plane_info[2].xdec == 1 && p_sys->di.plane_info[2].ydec == 1 )
 298         {
 299             p_dec->fmt_out.i_codec = VLC_CODEC_I420;
 300         }
 301         else if( p_sys->di.plane_info[0].xdec == 0 && p_sys->di.plane_info[0].ydec == 0 &&
 302                  p_sys->di.plane_info[1].xdec == 0 && p_sys->di.plane_info[1].ydec == 0 &&
 303                  p_sys->di.plane_info[2].xdec == 0 && p_sys->di.plane_info[2].ydec == 0 )
 304         {
 305             p_dec->fmt_out.i_codec = VLC_CODEC_I444;
 306         }
 307         else
 308         {
 309             msg_Err( p_dec, "unknown chroma in daala sample" );
 310         }
 311     }
 312
 313     p_dec->fmt_out.video.i_width = p_sys->di.pic_width;
 314     p_dec->fmt_out.video.i_height = p_sys->di.pic_height;
 315     if( p_sys->di.pic_width && p_sys->di.pic_height )
 316     {
 317         p_dec->fmt_out.video.i_visible_width = p_sys->di.pic_width;
 318         p_dec->fmt_out.video.i_visible_height = p_sys->di.pic_height;
 319     }
 320
 321     if( p_sys->di.pixel_aspect_denominator && p_sys->di.pixel_aspect_numerator )
 322     {
 323         p_dec->fmt_out.video.i_sar_num = p_sys->di.pixel_aspect_numerator;
 324         p_dec->fmt_out.video.i_sar_den = p_sys->di.pixel_aspect_denominator;
 325     }
 326     else
 327     {
 328         p_dec->fmt_out.video.i_sar_num = 1;
 329         p_dec->fmt_out.video.i_sar_den = 1;
 330     }
 331
 332     if( p_sys->di.timebase_numerator > 0 && p_sys->di.timebase_denominator > 0 )
 333     {
 334         p_dec->fmt_out.video.i_frame_rate = p_sys->di.timebase_numerator;
 335         p_dec->fmt_out.video.i_frame_rate_base = p_sys->di.timebase_denominator;
 336     }
 337
 338     msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content ",
 339              p_sys->di.pic_width, p_sys->di.pic_height,
 340              (double)p_sys->di.timebase_numerator/p_sys->di.timebase_denominator );
 341
 342     /* The next packet in order is the comments header */
 343     dpacket.b_o_s  = 0;
 344     dpacket.bytes  = pi_size[1];
 345     dpacket.packet = pp_data[1];
 346
 347     if( daala_decode_header_in( &p_sys->di, &p_sys->dc, &ds, &dpacket ) < 0 )
 348     {
 349         msg_Err( p_dec, "Daala comment header is corrupted" );
 350         ret = VLC_EGENERIC;
 351         goto cleanup;
 352     }
 353
 354     ParseDaalaComments( p_dec );
 355
 356     /* The next packet in order is the setup header
 357      * We need to watch out that this packet is not missing as a
 358      * missing or corrupted header is fatal. */
 359     dpacket.b_o_s  = 0;
 360     dpacket.bytes  = pi_size[2];
 361     dpacket.packet = pp_data[2];
 362     if( daala_decode_header_in( &p_sys->di, &p_sys->dc, &ds, &dpacket ) < 0 )
 363     {
 364         msg_Err( p_dec, "Daala setup header is corrupted" );
 365         ret = VLC_EGENERIC;
 366         goto cleanup;
 367     }
 368
 369     if( !p_sys->b_packetizer )
 370     {
 371         /* We have all the headers, initialize decoder */
 372         if ( ( p_sys->dcx = daala_decode_create( &p_sys->di, ds ) ) == NULL )
 373         {
 374             msg_Err( p_dec, "Could not allocate Daala decoder" );
 375             ret = VLC_EGENERIC;
 376             goto cleanup;
 377         }
 378     }
 379     else
 380     {
 381         void* p_extra = realloc( p_dec->fmt_out.p_extra,
 382                                  p_dec->fmt_in.i_extra );
 383         if( unlikely( p_extra == NULL ) )
 384         {
 385             ret = VLC_ENOMEM;
 386             goto cleanup;
 387         }
 388         p_dec->fmt_out.p_extra = p_extra;
 389         p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
 390         memcpy( p_dec->fmt_out.p_extra,
 391                 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
 392     }
 393
 394 cleanup:
 395     /* Clean up the decoder setup info... we're done with it */
 396     daala_setup_free( ds );
 397
 398     return ret;
 399 }
 400
 401 /*****************************************************************************
 402  * ProcessPacket: processes a daala packet.
 403  *****************************************************************************/
 404 static void *ProcessPacket( decoder_t *p_dec, daala_packet *p_dpacket,
 405                             block_t **pp_block )
 406 {
 407     decoder_sys_t *p_sys = p_dec->p_sys;
 408     block_t *p_block = *pp_block;
 409     void *p_buf;
 410
 411     if( ( p_block->i_flags&(BLOCK_FLAG_CORRUPTED) ) != 0 )
 412     {
 413         /* Don't send the the first packet after a discontinuity to
 414          * daala_decode, otherwise we get purple/green display artifacts
 415          * appearing in the video output */
 416         block_Release(p_block);
 417         return NULL;
 418     }
 419
 420     /* Date management */
 421     if( p_block->i_pts > VLC_TS_INVALID && p_block->i_pts != p_sys->i_pts )
 422     {
 423         p_sys->i_pts = p_block->i_pts;
 424     }
 425
 426     *pp_block = NULL; /* To avoid being fed the same packet again */
 427
 428     if( p_sys->b_packetizer )
 429     {
 430         /* Date management */
 431         p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 432
 433         p_block->i_length = p_sys->i_pts - p_block->i_pts;
 434
 435         p_buf = p_block;
 436     }
 437     else
 438     {
 439         p_buf = DecodePacket( p_dec, p_dpacket );
 440         block_Release( p_block );
 441     }
 442
 443     /* Date management */
 444     p_sys->i_pts += ( CLOCK_FREQ * p_sys->di.timebase_denominator /
 445                       p_sys->di.timebase_numerator ); /* 1 frame per packet */
 446
 447     return p_buf;
 448 }
 449
 450 /*****************************************************************************
 451  * DecodePacket: decodes a Daala packet.
 452  *****************************************************************************/
 453 static picture_t *DecodePacket( decoder_t *p_dec, daala_packet *p_dpacket )
 454 {
 455     decoder_sys_t *p_sys = p_dec->p_sys;
 456     picture_t *p_pic;
 457     daala_image ycbcr;
 458
 459     if (daala_decode_packet_in( p_sys->dcx, p_dpacket ) < 0)
 460         return NULL; /* bad packet */
 461
 462     if (!daala_decode_img_out( p_sys->dcx, &ycbcr ))
 463         return NULL;
 464
 465     /* Check for keyframe */
 466     if( daala_packet_iskeyframe( p_dpacket ) )
 467         p_sys->b_decoded_first_keyframe = true;
 468
 469     /* Get a new picture */
 470     p_pic = decoder_NewPicture( p_dec );
 471     if( !p_pic ) return NULL;
 472
 473     daala_CopyPicture( p_pic, &ycbcr );
 474
 475     p_pic->date = p_sys->i_pts;
 476
 477     return p_pic;
 478 }
 479
 480 /*****************************************************************************
 481  * ParseDaalaComments:
 482  *****************************************************************************/
 483 static void ParseDaalaComments( decoder_t *p_dec )
 484 {
 485     char *psz_name, *psz_value, *psz_comment;
 486     /* Regarding the daala_comment structure: */
 487
 488     /* The metadata is stored as a series of (tag, value) pairs, in
 489        length-encoded string vectors. The first occurrence of the '='
 490        character delimits the tag and value. A particular tag may
 491        occur more than once, and order is significant. The character
 492        set encoding for the strings is always UTF-8, but the tag names
 493        are limited to ASCII, and treated as case-insensitive. See the
 494        Theora specification, Section 6.3.3 for details. */
 495
 496     /* In filling in this structure, daala_decode_header_in() will
 497        null-terminate the user_comment strings for safety. However,
 498        the bitstream format itself treats them as 8-bit clean vectors,
 499        possibly containing null characters, and so the length array
 500        should be treated as their authoritative length. */
 501     for ( int i = 0; i < p_dec->p_sys->dc.comments; i++ )
 502     {
 503         int clen = p_dec->p_sys->dc.comment_lengths[i];
 504         if ( clen <= 0 || clen >= INT_MAX ) { continue; }
 505         psz_comment = malloc( clen + 1 );
 506         if( !psz_comment )
 507             break;
 508         memcpy( (void*)psz_comment, (void*)p_dec->p_sys->dc.user_comments[i], clen + 1 );
 509         psz_comment[clen] = '\0';
 510
 511         psz_name = psz_comment;
 512         psz_value = strchr( psz_comment, '=' );
 513         if( psz_value )
 514         {
 515             *psz_value = '\0';
 516             psz_value++;
 517
 518             if( !p_dec->p_description )
 519                 p_dec->p_description = vlc_meta_New();
 520             /* TODO:  Since psz_value can contain NULLs see if there is an
 521              * instance where we need to preserve the full length of this string */
 522             if( p_dec->p_description )
 523                 vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
 524         }
 525         free( psz_comment );
 526     }
 527 }
 528
 529 /*****************************************************************************
 530  * CloseDecoder: daala decoder destruction
 531  *****************************************************************************/
 532 static void CloseDecoder( vlc_object_t *p_this )
 533 {
 534     decoder_t *p_dec = (decoder_t *)p_this;
 535     decoder_sys_t *p_sys = p_dec->p_sys;
 536
 537     daala_info_clear(&p_sys->di);
 538     daala_comment_clear(&p_sys->dc);
 539     daala_decode_free(p_sys->dcx);
 540     free( p_sys );
 541 }
 542
 543 /*****************************************************************************
 544  * daala_CopyPicture: copy a picture from daala internal buffers to a
 545  *                     picture_t structure.
 546  *****************************************************************************/
 547 static void daala_CopyPicture( picture_t *p_pic,
 548                                daala_image *ycbcr )
 549 {
 550     const int i_planes = p_pic->i_planes < 3 ? p_pic->i_planes : 3;
 551     for( int i_plane = 0; i_plane < i_planes; i_plane++ )
 552     {
 553         const int i_total_lines = __MIN(p_pic->p[i_plane].i_lines,
 554                 ycbcr->height >> ycbcr->planes[i_plane].ydec);
 555         uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
 556         uint8_t *p_src = ycbcr->planes[i_plane].data;
 557         const int i_dst_stride  = p_pic->p[i_plane].i_pitch;
 558         const int i_src_stride  = ycbcr->planes[i_plane].ystride;
 559         for( int i_line = 0; i_line < i_total_lines; i_line++ )
 560         {
 561             memcpy( p_dst, p_src, i_src_stride );
 562             p_src += i_src_stride;
 563             p_dst += i_dst_stride;
 564         }
 565     }
 566 }
 567
 568 #ifdef ENABLE_SOUT
 569 struct encoder_sys_t
 570 {
 571     daala_info      di;                     /* daala bitstream settings */
 572     daala_comment   dc;                     /* daala comment header */
 573     daala_enc_ctx   *dcx;                   /* daala context */
 574 };
 575
 576 static int OpenEncoder( vlc_object_t *p_this )
 577 {
 578     encoder_t *p_enc = (encoder_t *)p_this;
 579     encoder_sys_t *p_sys;
 580     daala_packet header;
 581     int status;
 582
 583     if( p_enc->fmt_out.i_codec != VLC_CODEC_DAALA &&
 584         !p_enc->b_force )
 585     {
 586         return VLC_EGENERIC;
 587     }
 588
 589     /* Allocate the memory needed to store the encoder's structure */
 590     p_sys = malloc( sizeof( encoder_sys_t ) );
 591     if( !p_sys )
 592         return VLC_ENOMEM;
 593     p_enc->p_sys = p_sys;
 594
 595     p_enc->pf_encode_video = Encode;
 596     p_enc->fmt_in.i_codec = VLC_CODEC_I420;
 597     p_enc->fmt_out.i_codec = VLC_CODEC_DAALA;
 598
 599     config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
 600
 601     char *psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX "chroma-fmt" );
 602     uint32_t i_codec;
 603     if( !psz_tmp ) {
 604         free(p_sys);
 605         return VLC_ENOMEM;
 606     } else {
 607         if( !strcmp( psz_tmp, "420" ) ) {
 608             i_codec = VLC_CODEC_I420;
 609         }
 610         else if( !strcmp( psz_tmp, "444" ) ) {
 611             i_codec = VLC_CODEC_I444;
 612         }
 613         else {
 614             msg_Err( p_enc, "Invalid chroma format: %s", psz_tmp );
 615             free( psz_tmp );
 616             free( p_sys );
 617             return VLC_EGENERIC;
 618         }
 619         free( psz_tmp );
 620         p_enc->fmt_in.i_codec = i_codec;
 621         /* update bits_per_pixel */
 622         video_format_Setup(&p_enc->fmt_in.video, i_codec,
 623                 p_enc->fmt_in.video.i_width,
 624                 p_enc->fmt_in.video.i_height,
 625                 p_enc->fmt_in.video.i_visible_width,
 626                 p_enc->fmt_in.video.i_visible_height,
 627                 p_enc->fmt_in.video.i_sar_num,
 628                 p_enc->fmt_in.video.i_sar_den);
 629     }
 630
 631     daala_info_init( &p_sys->di );
 632
 633     p_sys->di.pic_width = p_enc->fmt_in.video.i_visible_width;
 634     p_sys->di.pic_height = p_enc->fmt_in.video.i_visible_height;
 635
 636     p_sys->di.nplanes = 3;
 637     for (int i = 0; i < p_sys->di.nplanes; i++)
 638     {
 639         p_sys->di.plane_info[i].xdec = i > 0 && i_codec != VLC_CODEC_I444;
 640         p_sys->di.plane_info[i].ydec = i_codec == VLC_CODEC_I420 ?
 641             p_sys->di.plane_info[i].xdec : 0;
 642     }
 643     p_sys->di.frame_duration = 1;
 644
 645     if( !p_enc->fmt_in.video.i_frame_rate ||
 646         !p_enc->fmt_in.video.i_frame_rate_base )
 647     {
 648         p_sys->di.timebase_numerator = 25;
 649         p_sys->di.timebase_denominator = 1;
 650     }
 651     else
 652     {
 653         p_sys->di.timebase_numerator = p_enc->fmt_in.video.i_frame_rate;
 654         p_sys->di.timebase_denominator = p_enc->fmt_in.video.i_frame_rate_base;
 655     }
 656
 657     if( p_enc->fmt_in.video.i_sar_num > 0 && p_enc->fmt_in.video.i_sar_den > 0 )
 658     {
 659         unsigned i_dst_num, i_dst_den;
 660         vlc_ureduce( &i_dst_num, &i_dst_den,
 661                      p_enc->fmt_in.video.i_sar_num,
 662                      p_enc->fmt_in.video.i_sar_den, 0 );
 663         p_sys->di.pixel_aspect_numerator = i_dst_num;
 664         p_sys->di.pixel_aspect_denominator = i_dst_den;
 665     }
 666     else
 667     {
 668         p_sys->di.pixel_aspect_numerator = 4;
 669         p_sys->di.pixel_aspect_denominator = 3;
 670     }
 671
 672     p_sys->di.keyframe_rate = var_GetInteger( p_enc, ENC_CFG_PREFIX "keyint" );
 673
 674     daala_enc_ctx *dcx;
 675     p_sys->dcx = dcx = daala_encode_create( &p_sys->di );
 676     if( !dcx )
 677     {
 678         free( p_sys );
 679         return VLC_ENOMEM;
 680     }
 681
 682     daala_comment_init( &p_sys->dc );
 683
 684     int i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" );
 685     daala_encode_ctl( dcx, OD_SET_QUANT, &i_quality, sizeof(i_quality) );
 686
 687     /* Create and store headers */
 688     while( ( status = daala_encode_flush_header( dcx, &p_sys->dc, &header ) ) )
 689     {
 690         if ( status < 0 )
 691         {
 692             CloseEncoder( p_this );
 693             return VLC_EGENERIC;
 694         }
 695         if( xiph_AppendHeaders( &p_enc->fmt_out.i_extra,
 696                                 &p_enc->fmt_out.p_extra, header.bytes,
 697                                 header.packet ) )
 698         {
 699             p_enc->fmt_out.i_extra = 0;
 700             p_enc->fmt_out.p_extra = NULL;
 701         }
 702     }
 703     return VLC_SUCCESS;
 704 }
 705
 706 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
 707 {
 708     encoder_sys_t *p_sys = p_enc->p_sys;
 709     daala_packet dpacket;
 710     block_t *p_block;
 711     daala_image img;
 712
 713     if( !p_pict ) return NULL;
 714
 715     const int i_width = p_sys->di.pic_width;
 716     const int i_height = p_sys->di.pic_height;
 717
 718     /* Sanity check */
 719     if( p_pict->p[0].i_pitch < i_width ||
 720         p_pict->p[0].i_lines < i_height )
 721     {
 722         msg_Err( p_enc, "frame is smaller than encoding size"
 723                  "(%ix%i->%ix%i) -> dropping frame",
 724                  p_pict->p[0].i_pitch, p_pict->p[0].i_lines,
 725                  i_width, i_height );
 726         return NULL;
 727     }
 728
 729     /* Daala is a one-frame-in, one-frame-out system. Submit a frame
 730      * for compression and pull out the packet. */
 731
 732     img.nplanes = p_sys->di.nplanes;
 733     img.width = i_width;
 734     img.height = i_height;
 735     for( int i = 0; i < img.nplanes; i++ )
 736     {
 737         img.planes[i].data = p_pict->p[i].p_pixels;
 738         img.planes[i].xdec = p_sys->di.plane_info[i].xdec;
 739         img.planes[i].ydec = p_sys->di.plane_info[i].ydec;
 740         img.planes[i].xstride = 1;
 741         img.planes[i].ystride = p_pict->p[i].i_pitch;
 742         img.planes[i].bitdepth = 8; /*FIXME: support higher bit depths*/
 743     }
 744
 745     if( daala_encode_img_in( p_sys->dcx, &img, 0 ) < 0 )
 746     {
 747         msg_Warn( p_enc, "failed encoding a frame" );
 748         return NULL;
 749     }
 750
 751     daala_encode_packet_out( p_sys->dcx, 0, &dpacket );
 752
 753     /* Daala packet to block */
 754     p_block = block_Alloc( dpacket.bytes );
 755     memcpy( p_block->p_buffer, dpacket.packet, dpacket.bytes );
 756     p_block->i_dts = p_block->i_pts = p_pict->date;
 757
 758     if( daala_packet_iskeyframe( &dpacket ) )
 759         p_block->i_flags |= BLOCK_FLAG_TYPE_I;
 760
 761     return p_block;
 762 }
 763
 764 static void CloseEncoder( vlc_object_t *p_this )
 765 {
 766     encoder_t *p_enc = (encoder_t *)p_this;
 767     encoder_sys_t *p_sys = p_enc->p_sys;
 768
 769     daala_info_clear(&p_sys->di);
 770     daala_comment_clear(&p_sys->dc);
 771     daala_encode_free(p_sys->dcx);
 772     free( p_sys );
 773 }
 774 #endif