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 int DecodeVideo( decoder_t *p_dec, block_t *p_block );
  84 static block_t *Packetize ( decoder_t *, block_t ** );
  85 static int  ProcessHeaders( decoder_t * );
  86 static void *ProcessPacket ( decoder_t *, daala_packet *, block_t * );
  87
  88 static picture_t *DecodePacket( decoder_t *, daala_packet * );
  89
  90 static void ParseDaalaComments( decoder_t * );
  91 static void daala_CopyPicture( picture_t *, daala_image * );
  92
  93 #ifdef ENABLE_SOUT
  94 static int  OpenEncoder( vlc_object_t *p_this );
  95 static void CloseEncoder( vlc_object_t *p_this );
  96 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
  97
  98 static const char *const enc_chromafmt_list[] = {
  99     "420", "444"
 100 };
 101 static const char *const enc_chromafmt_list_text[] = {
 102     "4:2:0", "4:4:4"
 103 };
 104 #endif
 105
 106 /*****************************************************************************
 107  * Module descriptor
 108  *****************************************************************************/
 109 #define ENC_QUALITY_TEXT N_("Encoding quality")
 110 #define ENC_QUALITY_LONGTEXT N_( \
 111   "Enforce a quality between 0 (lossless) and 511 (worst)." )
 112 #define ENC_KEYINT_TEXT N_("Keyframe interval")
 113 #define ENC_KEYINT_LONGTEXT N_( \
 114   "Enforce a keyframe interval between 1 and 1000." )
 115
 116 vlc_module_begin ()
 117     set_category( CAT_INPUT )
 118     set_subcategory( SUBCAT_INPUT_VCODEC )
 119     set_shortname( "Daala" )
 120     set_description( N_("Daala video decoder") )
 121     set_capability( "video decoder", 100 )
 122     set_callbacks( OpenDecoder, CloseDecoder )
 123     add_shortcut( "daala" )
 124     add_submodule ()
 125     set_description( N_("Daala video packetizer") )
 126     set_capability( "packetizer", 100 )
 127     set_callbacks( OpenPacketizer, CloseDecoder )
 128     add_shortcut( "daala" )
 129
 130 #ifdef ENABLE_SOUT
 131     add_submodule ()
 132     set_description( N_("Daala video encoder") )
 133     set_capability( "encoder", 150 )
 134     set_callbacks( OpenEncoder, CloseEncoder )
 135     add_shortcut( "daala" )
 136
 137 #   define ENC_CFG_PREFIX "sout-daala-"
 138     add_integer_with_range( ENC_CFG_PREFIX "quality", 10, 0, 511,
 139                  ENC_QUALITY_TEXT, ENC_QUALITY_LONGTEXT, false )
 140     add_integer_with_range( ENC_CFG_PREFIX "keyint", 256, 1, 1000,
 141                  ENC_KEYINT_TEXT, ENC_KEYINT_LONGTEXT, false )
 142
 143 #   define ENC_CHROMAFMT_TEXT N_("Chroma format")
 144 #   define ENC_CHROMAFMT_LONGTEXT N_("Picking chroma format will force a " \
 145                                      "conversion of the video into that format")
 146
 147     add_string( ENC_CFG_PREFIX "chroma-fmt", "420", ENC_CHROMAFMT_TEXT,
 148                 ENC_CHROMAFMT_LONGTEXT, false )
 149     change_string_list( enc_chromafmt_list, enc_chromafmt_list_text )
 150 vlc_module_end ()
 151
 152 static const char *const ppsz_enc_options[] = {
 153     "quality", "keyint", "chroma-fmt", NULL
 154 };
 155 #endif
 156
 157 /*****************************************************************************
 158  * OpenDecoder: probe the decoder and return score
 159  *****************************************************************************/
 160 static int OpenDecoder( vlc_object_t *p_this )
 161 {
 162     decoder_t *p_dec = (decoder_t*)p_this;
 163     decoder_sys_t *p_sys;
 164
 165     if( p_dec->fmt_in.i_codec != VLC_CODEC_DAALA )
 166     {
 167         return VLC_EGENERIC;
 168     }
 169
 170     /* Allocate the memory needed to store the decoder's structure */
 171     p_sys = malloc(sizeof(*p_sys));
 172     if( p_sys == NULL )
 173         return VLC_ENOMEM;
 174
 175     p_dec->p_sys = p_sys;
 176     p_dec->p_sys->b_packetizer = false;
 177     p_sys->b_has_headers = false;
 178     p_sys->i_pts = VLC_TS_INVALID;
 179     p_sys->b_decoded_first_keyframe = false;
 180     p_sys->dcx = NULL;
 181
 182     /* Set output properties */
 183     p_dec->fmt_out.i_codec = VLC_CODEC_I420;
 184
 185     /* Set callbacks */
 186     p_dec->pf_decode    = DecodeVideo;
 187     p_dec->pf_packetize = Packetize;
 188
 189     /* Init supporting Daala structures needed in header parsing */
 190     daala_comment_init( &p_sys->dc );
 191     daala_info_init( &p_sys->di );
 192
 193     return VLC_SUCCESS;
 194 }
 195
 196 static int OpenPacketizer( vlc_object_t *p_this )
 197 {
 198     decoder_t *p_dec = (decoder_t*)p_this;
 199
 200     int i_ret = OpenDecoder( p_this );
 201
 202     if( i_ret == VLC_SUCCESS )
 203     {
 204         p_dec->p_sys->b_packetizer = true;
 205         p_dec->fmt_out.i_codec = VLC_CODEC_DAALA;
 206     }
 207
 208     return i_ret;
 209 }
 210
 211 /****************************************************************************
 212  * DecodeBlock: the whole thing
 213  ****************************************************************************
 214  * This function must be fed with Daala packets.
 215  ****************************************************************************/
 216 static void *DecodeBlock( decoder_t *p_dec, block_t *p_block )
 217 {
 218     decoder_sys_t *p_sys = p_dec->p_sys;
 219     daala_packet dpacket;
 220
 221     /* Block to Daala packet */
 222     dpacket.packet = p_block->p_buffer;
 223     dpacket.bytes = p_block->i_buffer;
 224     dpacket.granulepos = p_block->i_dts;
 225     dpacket.b_o_s = 0;
 226     dpacket.e_o_s = 0;
 227     dpacket.packetno = 0;
 228
 229     /* Check for headers */
 230     if( !p_sys->b_has_headers )
 231     {
 232         if( ProcessHeaders( p_dec ) )
 233         {
 234             block_Release( p_block );
 235             return NULL;
 236         }
 237         p_sys->b_has_headers = true;
 238     }
 239
 240     /* If we haven't seen a single keyframe yet, set to preroll,
 241      * otherwise we'll get display artifacts.  (This is impossible
 242      * in the general case, but can happen if e.g. we play a network stream
 243      * using a timed URL, such that the server doesn't start the video with a
 244      * keyframe). */
 245     if( !p_sys->b_decoded_first_keyframe )
 246         p_block->i_flags |= BLOCK_FLAG_PREROLL; /* Wait until we've decoded the first keyframe */
 247
 248     return ProcessPacket( p_dec, &dpacket, p_block );
 249 }
 250
 251 static int DecodeVideo( decoder_t *p_dec, block_t *p_block )
 252 {
 253     if( p_block == NULL ) /* No Drain */
 254         return VLCDEC_SUCCESS;
 255
 256     picture_t *p_pic = DecodeBlock( p_dec, p_block );
 257     if( p_pic != NULL )
 258         decoder_QueueVideo( p_dec, p_pic );
 259     return VLCDEC_SUCCESS;
 260 }
 261
 262 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
 263 {
 264     if( pp_block == NULL ) /* No Drain */
 265         return NULL;
 266     block_t *p_block = *pp_block; *pp_block = NULL;
 267     if( p_block == NULL )
 268         return NULL;
 269     return DecodeBlock( p_dec, p_block );
 270 }
 271
 272 /*****************************************************************************
 273  * ProcessHeaders: process Daala headers.
 274  *****************************************************************************/
 275 static int ProcessHeaders( decoder_t *p_dec )
 276 {
 277     int ret = VLC_SUCCESS;
 278     decoder_sys_t *p_sys = p_dec->p_sys;
 279     daala_packet dpacket;
 280     daala_setup_info *ds = NULL; /* daala setup information */
 281
 282     unsigned pi_size[XIPH_MAX_HEADER_COUNT];
 283     void     *pp_data[XIPH_MAX_HEADER_COUNT];
 284     unsigned i_count;
 285     if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
 286                            p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) )
 287         return VLC_EGENERIC;
 288     if( i_count < 3 )
 289         return VLC_EGENERIC;
 290
 291     dpacket.granulepos = -1;
 292     dpacket.e_o_s = 0;
 293     dpacket.packetno = 0;
 294
 295     /* Take care of the initial info header */
 296     dpacket.b_o_s  = 1; /* yes this actually is a b_o_s packet :) */
 297     dpacket.bytes  = pi_size[0];
 298     dpacket.packet = pp_data[0];
 299     if( daala_decode_header_in( &p_sys->di, &p_sys->dc, &ds, &dpacket ) < 0 )
 300     {
 301         msg_Err( p_dec, "this bitstream does not contain Daala video data" );
 302         ret = VLC_EGENERIC;
 303         goto cleanup;
 304     }
 305
 306     /* Set output properties */
 307     if( !p_sys->b_packetizer )
 308     {
 309         if( p_sys->di.plane_info[0].xdec == 0 && p_sys->di.plane_info[0].ydec == 0 &&
 310             p_sys->di.plane_info[1].xdec == 1 && p_sys->di.plane_info[1].ydec == 1 &&
 311             p_sys->di.plane_info[2].xdec == 1 && p_sys->di.plane_info[2].ydec == 1 )
 312         {
 313             p_dec->fmt_out.i_codec = VLC_CODEC_I420;
 314         }
 315         else if( p_sys->di.plane_info[0].xdec == 0 && p_sys->di.plane_info[0].ydec == 0 &&
 316                  p_sys->di.plane_info[1].xdec == 0 && p_sys->di.plane_info[1].ydec == 0 &&
 317                  p_sys->di.plane_info[2].xdec == 0 && p_sys->di.plane_info[2].ydec == 0 )
 318         {
 319             p_dec->fmt_out.i_codec = VLC_CODEC_I444;
 320         }
 321         else
 322         {
 323             msg_Err( p_dec, "unknown chroma in daala sample" );
 324         }
 325     }
 326
 327     p_dec->fmt_out.video.i_width = p_sys->di.pic_width;
 328     p_dec->fmt_out.video.i_height = p_sys->di.pic_height;
 329     if( p_sys->di.pic_width && p_sys->di.pic_height )
 330     {
 331         p_dec->fmt_out.video.i_visible_width = p_sys->di.pic_width;
 332         p_dec->fmt_out.video.i_visible_height = p_sys->di.pic_height;
 333     }
 334
 335     if( p_sys->di.pixel_aspect_denominator && p_sys->di.pixel_aspect_numerator )
 336     {
 337         p_dec->fmt_out.video.i_sar_num = p_sys->di.pixel_aspect_numerator;
 338         p_dec->fmt_out.video.i_sar_den = p_sys->di.pixel_aspect_denominator;
 339     }
 340     else
 341     {
 342         p_dec->fmt_out.video.i_sar_num = 1;
 343         p_dec->fmt_out.video.i_sar_den = 1;
 344     }
 345
 346     if( p_sys->di.timebase_numerator > 0 && p_sys->di.timebase_denominator > 0 )
 347     {
 348         p_dec->fmt_out.video.i_frame_rate = p_sys->di.timebase_numerator;
 349         p_dec->fmt_out.video.i_frame_rate_base = p_sys->di.timebase_denominator;
 350     }
 351
 352     msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content ",
 353              p_sys->di.pic_width, p_sys->di.pic_height,
 354              (double)p_sys->di.timebase_numerator/p_sys->di.timebase_denominator );
 355
 356     /* The next packet in order is the comments header */
 357     dpacket.b_o_s  = 0;
 358     dpacket.bytes  = pi_size[1];
 359     dpacket.packet = pp_data[1];
 360
 361     if( daala_decode_header_in( &p_sys->di, &p_sys->dc, &ds, &dpacket ) < 0 )
 362     {
 363         msg_Err( p_dec, "Daala comment header is corrupted" );
 364         ret = VLC_EGENERIC;
 365         goto cleanup;
 366     }
 367
 368     ParseDaalaComments( p_dec );
 369
 370     /* The next packet in order is the setup header
 371      * We need to watch out that this packet is not missing as a
 372      * missing or corrupted header is fatal. */
 373     dpacket.b_o_s  = 0;
 374     dpacket.bytes  = pi_size[2];
 375     dpacket.packet = pp_data[2];
 376     if( daala_decode_header_in( &p_sys->di, &p_sys->dc, &ds, &dpacket ) < 0 )
 377     {
 378         msg_Err( p_dec, "Daala setup header is corrupted" );
 379         ret = VLC_EGENERIC;
 380         goto cleanup;
 381     }
 382
 383     if( !p_sys->b_packetizer )
 384     {
 385         /* We have all the headers, initialize decoder */
 386         if ( ( p_sys->dcx = daala_decode_create( &p_sys->di, ds ) ) == NULL )
 387         {
 388             msg_Err( p_dec, "Could not allocate Daala decoder" );
 389             ret = VLC_EGENERIC;
 390             goto cleanup;
 391         }
 392     }
 393     else
 394     {
 395         void* p_extra = realloc( p_dec->fmt_out.p_extra,
 396                                  p_dec->fmt_in.i_extra );
 397         if( unlikely( p_extra == NULL ) )
 398         {
 399             ret = VLC_ENOMEM;
 400             goto cleanup;
 401         }
 402         p_dec->fmt_out.p_extra = p_extra;
 403         p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
 404         memcpy( p_dec->fmt_out.p_extra,
 405                 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
 406     }
 407
 408 cleanup:
 409     /* Clean up the decoder setup info... we're done with it */
 410     daala_setup_free( ds );
 411
 412     return ret;
 413 }
 414
 415 /*****************************************************************************
 416  * ProcessPacket: processes a daala packet.
 417  *****************************************************************************/
 418 static void *ProcessPacket( decoder_t *p_dec, daala_packet *p_dpacket,
 419                             block_t *p_block )
 420 {
 421     decoder_sys_t *p_sys = p_dec->p_sys;
 422     void *p_buf;
 423
 424     if( ( p_block->i_flags&(BLOCK_FLAG_CORRUPTED) ) != 0 )
 425     {
 426         /* Don't send the the first packet after a discontinuity to
 427          * daala_decode, otherwise we get purple/green display artifacts
 428          * appearing in the video output */
 429         block_Release(p_block);
 430         return NULL;
 431     }
 432
 433     /* Date management */
 434     if( p_block->i_pts > VLC_TS_INVALID && p_block->i_pts != p_sys->i_pts )
 435     {
 436         p_sys->i_pts = p_block->i_pts;
 437     }
 438
 439     if( p_sys->b_packetizer )
 440     {
 441         /* Date management */
 442         p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 443
 444         p_block->i_length = p_sys->i_pts - p_block->i_pts;
 445
 446         p_buf = p_block;
 447     }
 448     else
 449     {
 450         p_buf = DecodePacket( p_dec, p_dpacket );
 451         block_Release( p_block );
 452     }
 453
 454     /* Date management */
 455     p_sys->i_pts += ( CLOCK_FREQ * p_sys->di.timebase_denominator /
 456                       p_sys->di.timebase_numerator ); /* 1 frame per packet */
 457
 458     return p_buf;
 459 }
 460
 461 /*****************************************************************************
 462  * DecodePacket: decodes a Daala packet.
 463  *****************************************************************************/
 464 static picture_t *DecodePacket( decoder_t *p_dec, daala_packet *p_dpacket )
 465 {
 466     decoder_sys_t *p_sys = p_dec->p_sys;
 467     picture_t *p_pic;
 468     daala_image ycbcr;
 469
 470     if (daala_decode_packet_in( p_sys->dcx, p_dpacket ) < 0)
 471         return NULL; /* bad packet */
 472
 473     if (!daala_decode_img_out( p_sys->dcx, &ycbcr ))
 474         return NULL;
 475
 476     /* Check for keyframe */
 477     if( daala_packet_iskeyframe( p_dpacket ) )
 478         p_sys->b_decoded_first_keyframe = true;
 479
 480     /* Get a new picture */
 481     if( decoder_UpdateVideoFormat( p_dec ) )
 482         return NULL;
 483     p_pic = decoder_NewPicture( p_dec );
 484     if( !p_pic ) return NULL;
 485
 486     daala_CopyPicture( p_pic, &ycbcr );
 487
 488     p_pic->date = p_sys->i_pts;
 489
 490     return p_pic;
 491 }
 492
 493 /*****************************************************************************
 494  * ParseDaalaComments:
 495  *****************************************************************************/
 496 static void ParseDaalaComments( decoder_t *p_dec )
 497 {
 498     char *psz_name, *psz_value, *psz_comment;
 499     /* Regarding the daala_comment structure: */
 500
 501     /* The metadata is stored as a series of (tag, value) pairs, in
 502        length-encoded string vectors. The first occurrence of the '='
 503        character delimits the tag and value. A particular tag may
 504        occur more than once, and order is significant. The character
 505        set encoding for the strings is always UTF-8, but the tag names
 506        are limited to ASCII, and treated as case-insensitive. See the
 507        Theora specification, Section 6.3.3 for details. */
 508
 509     /* In filling in this structure, daala_decode_header_in() will
 510        null-terminate the user_comment strings for safety. However,
 511        the bitstream format itself treats them as 8-bit clean vectors,
 512        possibly containing null characters, and so the length array
 513        should be treated as their authoritative length. */
 514     for ( int i = 0; i < p_dec->p_sys->dc.comments; i++ )
 515     {
 516         int clen = p_dec->p_sys->dc.comment_lengths[i];
 517         if ( clen <= 0 || clen >= INT_MAX ) { continue; }
 518         psz_comment = malloc( clen + 1 );
 519         if( !psz_comment )
 520             break;
 521         memcpy( (void*)psz_comment, (void*)p_dec->p_sys->dc.user_comments[i], clen + 1 );
 522         psz_comment[clen] = '\0';
 523
 524         psz_name = psz_comment;
 525         psz_value = strchr( psz_comment, '=' );
 526         if( psz_value )
 527         {
 528             *psz_value = '\0';
 529             psz_value++;
 530
 531             if( !p_dec->p_description )
 532                 p_dec->p_description = vlc_meta_New();
 533             /* TODO:  Since psz_value can contain NULLs see if there is an
 534              * instance where we need to preserve the full length of this string */
 535             if( p_dec->p_description )
 536                 vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
 537         }
 538         free( psz_comment );
 539     }
 540 }
 541
 542 /*****************************************************************************
 543  * CloseDecoder: daala decoder destruction
 544  *****************************************************************************/
 545 static void CloseDecoder( vlc_object_t *p_this )
 546 {
 547     decoder_t *p_dec = (decoder_t *)p_this;
 548     decoder_sys_t *p_sys = p_dec->p_sys;
 549
 550     daala_info_clear(&p_sys->di);
 551     daala_comment_clear(&p_sys->dc);
 552     daala_decode_free(p_sys->dcx);
 553     free( p_sys );
 554 }
 555
 556 /*****************************************************************************
 557  * daala_CopyPicture: copy a picture from daala internal buffers to a
 558  *                     picture_t structure.
 559  *****************************************************************************/
 560 static void daala_CopyPicture( picture_t *p_pic,
 561                                daala_image *ycbcr )
 562 {
 563     const int i_planes = p_pic->i_planes < 3 ? p_pic->i_planes : 3;
 564     for( int i_plane = 0; i_plane < i_planes; i_plane++ )
 565     {
 566         const int i_total_lines = __MIN(p_pic->p[i_plane].i_lines,
 567                 ycbcr->height >> ycbcr->planes[i_plane].ydec);
 568         uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
 569         uint8_t *p_src = ycbcr->planes[i_plane].data;
 570         const int i_dst_stride  = p_pic->p[i_plane].i_pitch;
 571         const int i_src_stride  = ycbcr->planes[i_plane].ystride;
 572         for( int i_line = 0; i_line < i_total_lines; i_line++ )
 573         {
 574             memcpy( p_dst, p_src, i_src_stride );
 575             p_src += i_src_stride;
 576             p_dst += i_dst_stride;
 577         }
 578     }
 579 }
 580
 581 #ifdef ENABLE_SOUT
 582 struct encoder_sys_t
 583 {
 584     daala_info      di;                     /* daala bitstream settings */
 585     daala_comment   dc;                     /* daala comment header */
 586     daala_enc_ctx   *dcx;                   /* daala context */
 587 };
 588
 589 static int OpenEncoder( vlc_object_t *p_this )
 590 {
 591     encoder_t *p_enc = (encoder_t *)p_this;
 592     encoder_sys_t *p_sys;
 593     daala_packet header;
 594     int status;
 595
 596     if( p_enc->fmt_out.i_codec != VLC_CODEC_DAALA &&
 597         !p_enc->obj.force )
 598     {
 599         return VLC_EGENERIC;
 600     }
 601
 602     /* Allocate the memory needed to store the encoder's structure */
 603     p_sys = malloc( sizeof( encoder_sys_t ) );
 604     if( !p_sys )
 605         return VLC_ENOMEM;
 606     p_enc->p_sys = p_sys;
 607
 608     p_enc->pf_encode_video = Encode;
 609     p_enc->fmt_in.i_codec = VLC_CODEC_I420;
 610     p_enc->fmt_out.i_codec = VLC_CODEC_DAALA;
 611
 612     config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
 613
 614     char *psz_tmp = var_GetString( p_enc, ENC_CFG_PREFIX "chroma-fmt" );
 615     uint32_t i_codec;
 616     if( !psz_tmp ) {
 617         free(p_sys);
 618         return VLC_ENOMEM;
 619     } else {
 620         if( !strcmp( psz_tmp, "420" ) ) {
 621             i_codec = VLC_CODEC_I420;
 622         }
 623         else if( !strcmp( psz_tmp, "444" ) ) {
 624             i_codec = VLC_CODEC_I444;
 625         }
 626         else {
 627             msg_Err( p_enc, "Invalid chroma format: %s", psz_tmp );
 628             free( psz_tmp );
 629             free( p_sys );
 630             return VLC_EGENERIC;
 631         }
 632         free( psz_tmp );
 633         p_enc->fmt_in.i_codec = i_codec;
 634         /* update bits_per_pixel */
 635         video_format_Setup(&p_enc->fmt_in.video, i_codec,
 636                 p_enc->fmt_in.video.i_width,
 637                 p_enc->fmt_in.video.i_height,
 638                 p_enc->fmt_in.video.i_visible_width,
 639                 p_enc->fmt_in.video.i_visible_height,
 640                 p_enc->fmt_in.video.i_sar_num,
 641                 p_enc->fmt_in.video.i_sar_den);
 642     }
 643
 644     daala_info_init( &p_sys->di );
 645
 646     p_sys->di.pic_width = p_enc->fmt_in.video.i_visible_width;
 647     p_sys->di.pic_height = p_enc->fmt_in.video.i_visible_height;
 648
 649     p_sys->di.nplanes = 3;
 650     for (int i = 0; i < p_sys->di.nplanes; i++)
 651     {
 652         p_sys->di.plane_info[i].xdec = i > 0 && i_codec != VLC_CODEC_I444;
 653         p_sys->di.plane_info[i].ydec = i_codec == VLC_CODEC_I420 ?
 654             p_sys->di.plane_info[i].xdec : 0;
 655     }
 656     p_sys->di.frame_duration = 1;
 657
 658     if( !p_enc->fmt_in.video.i_frame_rate ||
 659         !p_enc->fmt_in.video.i_frame_rate_base )
 660     {
 661         p_sys->di.timebase_numerator = 25;
 662         p_sys->di.timebase_denominator = 1;
 663     }
 664     else
 665     {
 666         p_sys->di.timebase_numerator = p_enc->fmt_in.video.i_frame_rate;
 667         p_sys->di.timebase_denominator = p_enc->fmt_in.video.i_frame_rate_base;
 668     }
 669
 670     if( p_enc->fmt_in.video.i_sar_num > 0 && p_enc->fmt_in.video.i_sar_den > 0 )
 671     {
 672         unsigned i_dst_num, i_dst_den;
 673         vlc_ureduce( &i_dst_num, &i_dst_den,
 674                      p_enc->fmt_in.video.i_sar_num,
 675                      p_enc->fmt_in.video.i_sar_den, 0 );
 676         p_sys->di.pixel_aspect_numerator = i_dst_num;
 677         p_sys->di.pixel_aspect_denominator = i_dst_den;
 678     }
 679     else
 680     {
 681         p_sys->di.pixel_aspect_numerator = 4;
 682         p_sys->di.pixel_aspect_denominator = 3;
 683     }
 684
 685     p_sys->di.keyframe_rate = var_GetInteger( p_enc, ENC_CFG_PREFIX "keyint" );
 686
 687     daala_enc_ctx *dcx;
 688     p_sys->dcx = dcx = daala_encode_create( &p_sys->di );
 689     if( !dcx )
 690     {
 691         free( p_sys );
 692         return VLC_ENOMEM;
 693     }
 694
 695     daala_comment_init( &p_sys->dc );
 696
 697     int i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" );
 698     daala_encode_ctl( dcx, OD_SET_QUANT, &i_quality, sizeof(i_quality) );
 699
 700     /* Create and store headers */
 701     while( ( status = daala_encode_flush_header( dcx, &p_sys->dc, &header ) ) )
 702     {
 703         if ( status < 0 )
 704         {
 705             CloseEncoder( p_this );
 706             return VLC_EGENERIC;
 707         }
 708         if( xiph_AppendHeaders( &p_enc->fmt_out.i_extra,
 709                                 &p_enc->fmt_out.p_extra, header.bytes,
 710                                 header.packet ) )
 711         {
 712             p_enc->fmt_out.i_extra = 0;
 713             p_enc->fmt_out.p_extra = NULL;
 714         }
 715     }
 716     return VLC_SUCCESS;
 717 }
 718
 719 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
 720 {
 721     encoder_sys_t *p_sys = p_enc->p_sys;
 722     daala_packet dpacket;
 723     block_t *p_block;
 724     daala_image img;
 725
 726     if( !p_pict ) return NULL;
 727
 728     const int i_width = p_sys->di.pic_width;
 729     const int i_height = p_sys->di.pic_height;
 730
 731     /* Sanity check */
 732     if( p_pict->p[0].i_pitch < i_width ||
 733         p_pict->p[0].i_lines < i_height )
 734     {
 735         msg_Err( p_enc, "frame is smaller than encoding size"
 736                  "(%ix%i->%ix%i) -> dropping frame",
 737                  p_pict->p[0].i_pitch, p_pict->p[0].i_lines,
 738                  i_width, i_height );
 739         return NULL;
 740     }
 741
 742     /* Daala is a one-frame-in, one-frame-out system. Submit a frame
 743      * for compression and pull out the packet. */
 744
 745     img.nplanes = p_sys->di.nplanes;
 746     img.width = i_width;
 747     img.height = i_height;
 748     for( int i = 0; i < img.nplanes; i++ )
 749     {
 750         img.planes[i].data = p_pict->p[i].p_pixels;
 751         img.planes[i].xdec = p_sys->di.plane_info[i].xdec;
 752         img.planes[i].ydec = p_sys->di.plane_info[i].ydec;
 753         img.planes[i].xstride = 1;
 754         img.planes[i].ystride = p_pict->p[i].i_pitch;
 755         img.planes[i].bitdepth = 8; /*FIXME: support higher bit depths*/
 756     }
 757
 758     if( daala_encode_img_in( p_sys->dcx, &img, 0 ) < 0 )
 759     {
 760         msg_Warn( p_enc, "failed encoding a frame" );
 761         return NULL;
 762     }
 763
 764     daala_encode_packet_out( p_sys->dcx, 0, &dpacket );
 765
 766     /* Daala packet to block */
 767     p_block = block_Alloc( dpacket.bytes );
 768     memcpy( p_block->p_buffer, dpacket.packet, dpacket.bytes );
 769     p_block->i_dts = p_block->i_pts = p_pict->date;
 770
 771     if( daala_packet_iskeyframe( &dpacket ) )
 772         p_block->i_flags |= BLOCK_FLAG_TYPE_I;
 773
 774     return p_block;
 775 }
 776
 777 static void CloseEncoder( vlc_object_t *p_this )
 778 {
 779     encoder_t *p_enc = (encoder_t *)p_this;
 780     encoder_sys_t *p_sys = p_enc->p_sys;
 781
 782     daala_info_clear(&p_sys->di);
 783     daala_comment_clear(&p_sys->dc);
 784     daala_encode_free(p_sys->dcx);
 785     free( p_sys );
 786 }
 787 #endif