modules/codec/vorbis.c

   1 /*****************************************************************************
   2  * vorbis.c: vorbis decoder/encoder/packetizer module using of libvorbis.
   3  *****************************************************************************
   4  * Copyright (C) 2001-2012 VLC authors and VideoLAN
   5  * Copyright (C) 2007 Société des arts technologiques
   6  * Copyright (C) 2007 Savoir-faire Linux
   7  *
   8  * $Id$
   9  *
  10  * Authors: Gildas Bazin <gbazin@videolan.org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU Lesser General Public License as published by
  14  * the Free Software Foundation; either version 2.1 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20  * GNU Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public License
  23  * along with this program; if not, write to the Free Software Foundation,
  24  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <vlc_common.h>
  35 #include <vlc_plugin.h>
  36 #include <vlc_codec.h>
  37 #include <vlc_charset.h>
  38 #include <vlc_aout.h>
  39 #include <vlc_input.h>
  40 #include <vlc_sout.h>
  41 #include "../demux/xiph.h"
  42
  43 #include <ogg/ogg.h>
  44
  45 #ifdef MODULE_NAME_IS_tremor
  46 # include <tremor/ivorbiscodec.h>
  47 # define INTERLEAVE_TYPE int32_t
  48
  49 #else
  50 # include <vorbis/codec.h>
  51 # define INTERLEAVE_TYPE float
  52
  53 # ifdef ENABLE_SOUT
  54 #  define HAVE_VORBIS_ENCODER
  55 #  include <vorbis/vorbisenc.h>
  56 #  ifndef OV_ECTL_RATEMANAGE_AVG
  57 #   define OV_ECTL_RATEMANAGE_AVG 0x0
  58 #  endif
  59 # endif
  60 #endif
  61
  62 /*****************************************************************************
  63  * decoder_sys_t : vorbis decoder descriptor
  64  *****************************************************************************/
  65 typedef struct
  66 {
  67     /* Module mode */
  68     bool b_packetizer;
  69
  70     bool            b_has_headers;
  71
  72     /*
  73      * Vorbis properties
  74      */
  75     vorbis_info      vi; /* struct that stores all the static vorbis bitstream
  76                             settings */
  77     vorbis_comment   vc; /* struct that stores all the bitstream user
  78                           * comments */
  79     vorbis_dsp_state vd; /* central working state for the packet->PCM
  80                           * decoder */
  81     vorbis_block     vb; /* local working space for packet->PCM decode */
  82
  83     /*
  84      * Common properties
  85      */
  86     date_t       end_date;
  87     int          i_last_block_size;
  88
  89     /*
  90     ** Channel reordering
  91     */
  92     uint8_t pi_chan_table[AOUT_CHAN_MAX];
  93 } decoder_sys_t;
  94
  95 static const int pi_channels_maps[9] =
  96 {
  97     0,
  98     AOUT_CHAN_CENTER,
  99     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
 100     AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
 101     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
 102      | AOUT_CHAN_REARRIGHT,
 103     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 104      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
 105     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 106      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE,
 107     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 108      | AOUT_CHAN_REARCENTER | AOUT_CHAN_MIDDLELEFT
 109      | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE,
 110     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT
 111      | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
 112      | AOUT_CHAN_LFE,
 113 };
 114
 115 /*
 116 **  channel order as defined in http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9
 117 */
 118
 119 /* recommended vorbis channel order for 8 channels */
 120 static const uint32_t pi_8channels_in[] =
 121 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
 122   AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 123   AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,AOUT_CHAN_LFE, 0 };
 124
 125 /* recommended vorbis channel order for 7 channels */
 126 static const uint32_t pi_7channels_in[] =
 127 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
 128   AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 129   AOUT_CHAN_REARCENTER, AOUT_CHAN_LFE, 0 };
 130
 131 /* recommended vorbis channel order for 6 channels */
 132 static const uint32_t pi_6channels_in[] =
 133 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
 134   AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_LFE, 0 };
 135
 136 /* recommended vorbis channel order for 4 channels */
 137 static const uint32_t pi_4channels_in[] =
 138 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, 0 };
 139
 140 /* recommended vorbis channel order for 3 channels */
 141 static const uint32_t pi_3channels_in[] =
 142 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, 0 };
 143
 144 /****************************************************************************
 145  * Local prototypes
 146  ****************************************************************************/
 147 static int  OpenDecoder   ( vlc_object_t * );
 148 static int  OpenPacketizer( vlc_object_t * );
 149 static void CloseDecoder  ( vlc_object_t * );
 150 static int  DecodeAudio  ( decoder_t *, block_t * );
 151 static block_t *Packetize  ( decoder_t *, block_t ** );
 152 static void Flush( decoder_t * );
 153
 154 static int  ProcessHeaders( decoder_t * );
 155 static block_t *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
 156
 157 static block_t *DecodePacket( decoder_t *, ogg_packet * );
 158 static block_t *SendPacket( decoder_t *, ogg_packet *, block_t * );
 159
 160 static void ParseVorbisComments( decoder_t * );
 161
 162 static void ConfigureChannelOrder(uint8_t *, int, uint32_t );
 163
 164 #ifdef HAVE_VORBIS_ENCODER
 165 static int OpenEncoder   ( vlc_object_t * );
 166 static void CloseEncoder ( vlc_object_t * );
 167 static block_t *Encode   ( encoder_t *, block_t * );
 168 #endif
 169
 170 /*****************************************************************************
 171  * Module descriptor
 172  *****************************************************************************/
 173 #define ENC_QUALITY_TEXT N_("Encoding quality")
 174 #define ENC_QUALITY_LONGTEXT N_( \
 175   "Enforce a quality between 1 (low) and 10 (high), instead " \
 176   "of specifying a particular bitrate. This will produce a VBR stream." )
 177 #define ENC_MAXBR_TEXT N_("Maximum encoding bitrate")
 178 #define ENC_MAXBR_LONGTEXT N_( \
 179   "Maximum bitrate in kbps. This is useful for streaming applications." )
 180 #define ENC_MINBR_TEXT N_("Minimum encoding bitrate")
 181 #define ENC_MINBR_LONGTEXT N_( \
 182   "Minimum bitrate in kbps. This is useful for encoding for a fixed-size channel." )
 183 #define ENC_CBR_TEXT N_("CBR encoding")
 184 #define ENC_CBR_LONGTEXT N_( \
 185   "Force a constant bitrate encoding (CBR)." )
 186
 187 vlc_module_begin ()
 188     set_shortname( "Vorbis" )
 189     set_description( N_("Vorbis audio decoder") )
 190 #ifdef MODULE_NAME_IS_tremor
 191     set_capability( "audio decoder", 90 )
 192 #else
 193     set_capability( "audio decoder", 100 )
 194 #endif
 195     set_category( CAT_INPUT )
 196     set_subcategory( SUBCAT_INPUT_ACODEC )
 197     set_callbacks( OpenDecoder, CloseDecoder )
 198
 199     add_submodule ()
 200     set_description( N_("Vorbis audio packetizer") )
 201     set_capability( "packetizer", 100 )
 202     set_callbacks( OpenPacketizer, CloseDecoder )
 203
 204 #ifdef HAVE_VORBIS_ENCODER
 205 #   define ENC_CFG_PREFIX "sout-vorbis-"
 206     add_submodule ()
 207     set_description( N_("Vorbis audio encoder") )
 208     set_capability( "encoder", 130 )
 209     set_callbacks( OpenEncoder, CloseEncoder )
 210
 211     add_integer( ENC_CFG_PREFIX "quality", 0, ENC_QUALITY_TEXT,
 212                  ENC_QUALITY_LONGTEXT, false )
 213         change_integer_range( 0, 10 )
 214     add_integer( ENC_CFG_PREFIX "max-bitrate", 0, ENC_MAXBR_TEXT,
 215                  ENC_MAXBR_LONGTEXT, false )
 216     add_integer( ENC_CFG_PREFIX "min-bitrate", 0, ENC_MINBR_TEXT,
 217                  ENC_MINBR_LONGTEXT, false )
 218     add_bool( ENC_CFG_PREFIX "cbr", false, ENC_CBR_TEXT,
 219                  ENC_CBR_LONGTEXT, false )
 220 #endif
 221
 222 vlc_module_end ()
 223
 224 #ifdef HAVE_VORBIS_ENCODER
 225 static const char *const ppsz_enc_options[] = {
 226     "quality", "max-bitrate", "min-bitrate", "cbr", NULL
 227 };
 228 #endif
 229
 230 static int OpenCommon( vlc_object_t *p_this, bool b_packetizer )
 231 {
 232     decoder_t *p_dec = (decoder_t*)p_this;
 233     decoder_sys_t *p_sys;
 234
 235     if( p_dec->fmt_in.i_codec != VLC_CODEC_VORBIS )
 236         return VLC_EGENERIC;
 237
 238     /* Allocate the memory needed to store the decoder's structure */
 239     p_dec->p_sys = p_sys = malloc( sizeof(*p_sys) );
 240     if( unlikely( !p_sys ) )
 241         return VLC_ENOMEM;
 242
 243     /* Misc init */
 244     date_Set( &p_sys->end_date, VLC_TICK_INVALID );
 245     p_sys->i_last_block_size = 0;
 246     p_sys->b_packetizer = b_packetizer;
 247     p_sys->b_has_headers = false;
 248
 249     /* Take care of vorbis init */
 250     vorbis_info_init( &p_sys->vi );
 251     vorbis_comment_init( &p_sys->vc );
 252
 253     if( b_packetizer )
 254     {
 255         p_dec->fmt_out.i_codec = VLC_CODEC_VORBIS;
 256         p_dec->pf_packetize  = Packetize;
 257     }
 258     else
 259     {
 260 #ifdef MODULE_NAME_IS_tremor
 261         p_dec->fmt_out.i_codec = VLC_CODEC_S32N;
 262 #else
 263         p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
 264 #endif
 265         p_dec->pf_decode     = DecodeAudio;
 266     }
 267
 268     p_dec->pf_flush      = Flush;
 269
 270     return VLC_SUCCESS;
 271 }
 272
 273 static int OpenDecoder( vlc_object_t *p_this )
 274 {
 275     return OpenCommon( p_this, false );
 276 }
 277
 278 static int OpenPacketizer( vlc_object_t *p_this )
 279 {
 280     return OpenCommon( p_this, true );
 281 }
 282
 283 /****************************************************************************
 284  * DecodeBlock: the whole thing
 285  ****************************************************************************
 286  * This function must be fed with ogg packets.
 287  ****************************************************************************/
 288 static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 289 {
 290     decoder_sys_t *p_sys = p_dec->p_sys;
 291     ogg_packet oggpacket;
 292
 293     if( *pp_block )
 294     {
 295         /* Block to Ogg packet */
 296         oggpacket.packet = (*pp_block)->p_buffer;
 297         oggpacket.bytes = (*pp_block)->i_buffer;
 298     }
 299     else
 300     {
 301         if( p_sys->b_packetizer ) return NULL;
 302
 303         /* Block to Ogg packet */
 304         oggpacket.packet = NULL;
 305         oggpacket.bytes = 0;
 306     }
 307
 308     oggpacket.granulepos = -1;
 309     oggpacket.b_o_s = 0;
 310     oggpacket.e_o_s = 0;
 311     oggpacket.packetno = 0;
 312
 313     /* Check for headers */
 314     if( !p_sys->b_has_headers )
 315     {
 316         if( ProcessHeaders( p_dec ) )
 317         {
 318             if( *pp_block )
 319                 block_Release( *pp_block );
 320             return NULL;
 321         }
 322         p_sys->b_has_headers = true;
 323     }
 324
 325     return ProcessPacket( p_dec, &oggpacket, pp_block );
 326 }
 327
 328 static int DecodeAudio( decoder_t *p_dec, block_t *p_block )
 329 {
 330     if( p_block == NULL ) /* No Drain */
 331         return VLCDEC_SUCCESS;
 332
 333     block_t **pp_block = &p_block, *p_out;
 334     while( ( p_out = DecodeBlock( p_dec, pp_block ) ) != NULL )
 335         decoder_QueueAudio( p_dec, p_out );
 336     return VLCDEC_SUCCESS;
 337 }
 338
 339 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
 340 {
 341     if( pp_block == NULL ) /* No Drain */
 342         return NULL;
 343     return DecodeBlock( p_dec, pp_block );
 344 }
 345
 346 /*****************************************************************************
 347  * ProcessHeaders: process Vorbis headers.
 348  *****************************************************************************/
 349 static int ProcessHeaders( decoder_t *p_dec )
 350 {
 351     decoder_sys_t *p_sys = p_dec->p_sys;
 352     ogg_packet oggpacket;
 353
 354     unsigned pi_size[XIPH_MAX_HEADER_COUNT];
 355     void *pp_data[XIPH_MAX_HEADER_COUNT];
 356     unsigned i_count;
 357     if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
 358                            p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) )
 359         return VLC_EGENERIC;
 360     if( i_count < 3 )
 361         return VLC_EGENERIC;
 362
 363     oggpacket.granulepos = -1;
 364     oggpacket.e_o_s = 0;
 365     oggpacket.packetno = 0;
 366
 367     /* Take care of the initial Vorbis header */
 368     oggpacket.b_o_s  = 1; /* yes this actually is a b_o_s packet :) */
 369     oggpacket.bytes  = pi_size[0];
 370     oggpacket.packet = pp_data[0];
 371     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 372     {
 373         msg_Err( p_dec, "this bitstream does not contain Vorbis audio data");
 374         return VLC_EGENERIC;
 375     }
 376
 377     /* Setup the format */
 378     p_dec->fmt_out.audio.i_rate     = p_sys->vi.rate;
 379     p_dec->fmt_out.audio.i_channels = p_sys->vi.channels;
 380
 381     if( p_dec->fmt_out.audio.i_channels >= ARRAY_SIZE(pi_channels_maps) )
 382     {
 383         msg_Err( p_dec, "invalid number of channels (1-%zu): %i",
 384                  ARRAY_SIZE(pi_channels_maps),
 385                  p_dec->fmt_out.audio.i_channels );
 386         return VLC_EGENERIC;
 387     }
 388
 389     p_dec->fmt_out.audio.i_physical_channels =
 390             pi_channels_maps[p_sys->vi.channels];
 391     p_dec->fmt_out.i_bitrate = __MAX( 0, (int32_t) p_sys->vi.bitrate_nominal );
 392
 393     date_Init( &p_sys->end_date, p_sys->vi.rate, 1 );
 394
 395     msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ud",
 396              p_sys->vi.channels, p_sys->vi.rate, p_dec->fmt_out.i_bitrate );
 397
 398     /* The next packet in order is the comments header */
 399     oggpacket.b_o_s  = 0;
 400     oggpacket.bytes  = pi_size[1];
 401     oggpacket.packet = pp_data[1];
 402     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 403     {
 404         msg_Err( p_dec, "2nd Vorbis header is corrupted" );
 405         return VLC_EGENERIC;
 406     }
 407     ParseVorbisComments( p_dec );
 408
 409     /* The next packet in order is the codebooks header
 410      * We need to watch out that this packet is not missing as a
 411      * missing or corrupted header is fatal. */
 412     oggpacket.b_o_s  = 0;
 413     oggpacket.bytes  = pi_size[2];
 414     oggpacket.packet = pp_data[2];
 415     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 416     {
 417         msg_Err( p_dec, "3rd Vorbis header is corrupted" );
 418         return VLC_EGENERIC;
 419     }
 420
 421     if( !p_sys->b_packetizer )
 422     {
 423         /* Initialize the Vorbis packet->PCM decoder */
 424         vorbis_synthesis_init( &p_sys->vd, &p_sys->vi );
 425         vorbis_block_init( &p_sys->vd, &p_sys->vb );
 426     }
 427     else
 428     {
 429         void* p_extra = realloc( p_dec->fmt_out.p_extra,
 430                                  p_dec->fmt_in.i_extra );
 431         if( unlikely( p_extra == NULL ) )
 432         {
 433             return VLC_ENOMEM;
 434         }
 435         p_dec->fmt_out.p_extra = p_extra;
 436         p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
 437         memcpy( p_dec->fmt_out.p_extra,
 438                 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
 439     }
 440
 441     ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
 442             p_dec->fmt_out.audio.i_physical_channels);
 443
 444     return VLC_SUCCESS;
 445 }
 446
 447 /*****************************************************************************
 448  * Flush:
 449  *****************************************************************************/
 450 static void Flush( decoder_t *p_dec )
 451 {
 452     decoder_sys_t *p_sys = p_dec->p_sys;
 453
 454     date_Set( &p_sys->end_date, VLC_TICK_INVALID );
 455 }
 456
 457 /*****************************************************************************
 458  * ProcessPacket: processes a Vorbis packet.
 459  *****************************************************************************/
 460 static block_t *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
 461                                block_t **pp_block )
 462 {
 463     decoder_sys_t *p_sys = p_dec->p_sys;
 464     block_t *p_block = *pp_block;
 465
 466     *pp_block = NULL; /* To avoid being fed the same packet again */
 467     if( !p_block )
 468         return NULL;
 469
 470     if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
 471     {
 472         Flush( p_dec );
 473         if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
 474         {
 475             block_Release(p_block);
 476             return NULL;
 477         }
 478     }
 479
 480     /* Date management */
 481     if( p_block->i_pts != VLC_TICK_INVALID &&
 482         p_block->i_pts != date_Get( &p_sys->end_date ) )
 483     {
 484         date_Set( &p_sys->end_date, p_block->i_pts );
 485     }
 486
 487     if( date_Get( &p_sys->end_date ) == VLC_TICK_INVALID )
 488     {
 489         /* We've just started the stream, wait for the first PTS. */
 490         if( p_block ) block_Release( p_block );
 491         return NULL;
 492     }
 493
 494
 495     if( p_sys->b_packetizer )
 496     {
 497         return SendPacket( p_dec, p_oggpacket, p_block );
 498     }
 499     else
 500     {
 501         block_t *p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
 502         if( p_block )
 503             block_Release( p_block );
 504         return p_aout_buffer;
 505     }
 506 }
 507
 508 /*****************************************************************************
 509  * Interleave: helper function to interleave channels
 510  *****************************************************************************/
 511 static void Interleave( INTERLEAVE_TYPE *p_out, const INTERLEAVE_TYPE **pp_in,
 512                         int i_nb_channels, int i_samples, uint8_t *pi_chan_table)
 513 {
 514     for( int j = 0; j < i_samples; j++ )
 515         for( int i = 0; i < i_nb_channels; i++ )
 516         {
 517 #ifdef MODULE_NAME_IS_tremor
 518             union { int32_t i; uint32_t u;} spl;
 519
 520             spl.u = ((uint32_t)pp_in[i][j]) << 8;
 521             p_out[j * i_nb_channels + pi_chan_table[i]] = spl.i;
 522 #else
 523             p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j];
 524 #endif
 525         }
 526 }
 527
 528 /*****************************************************************************
 529  * DecodePacket: decodes a Vorbis packet.
 530  *****************************************************************************/
 531 static block_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
 532 {
 533     decoder_sys_t *p_sys = p_dec->p_sys;
 534     int           i_samples;
 535
 536     INTERLEAVE_TYPE **pp_pcm;
 537
 538     if( p_oggpacket->bytes &&
 539         vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 )
 540         vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb );
 541
 542     /* **pp_pcm is a multichannel float vector. In stereo, for
 543      * example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is
 544      * the size of each channel. Convert the float values
 545      * (-1.<=range<=1.) to whatever PCM format and write it out */
 546
 547     if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 )
 548     {
 549
 550         block_t *p_aout_buffer;
 551
 552         if( decoder_UpdateAudioFormat( p_dec ) ) return NULL;
 553         p_aout_buffer =
 554             decoder_NewAudioBuffer( p_dec, i_samples );
 555
 556         if( p_aout_buffer == NULL ) return NULL;
 557
 558         /* Interleave the samples */
 559         Interleave( (INTERLEAVE_TYPE*)p_aout_buffer->p_buffer,
 560                     (const INTERLEAVE_TYPE**)pp_pcm, p_sys->vi.channels, i_samples,
 561                     p_sys->pi_chan_table);
 562
 563         /* Tell libvorbis how many samples we actually consumed */
 564         vorbis_synthesis_read( &p_sys->vd, i_samples );
 565
 566         /* Date management */
 567         p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
 568         p_aout_buffer->i_length = date_Increment( &p_sys->end_date,
 569                                            i_samples ) - p_aout_buffer->i_pts;
 570         return p_aout_buffer;
 571     }
 572     else
 573     {
 574         return NULL;
 575     }
 576 }
 577
 578 /*****************************************************************************
 579  * SendPacket: send an ogg dated packet to the stream output.
 580  *****************************************************************************/
 581 static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
 582                             block_t *p_block )
 583 {
 584     decoder_sys_t *p_sys = p_dec->p_sys;
 585     int i_block_size, i_samples;
 586
 587     i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket );
 588     if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */
 589     i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
 590     p_sys->i_last_block_size = i_block_size;
 591
 592     /* Date management */
 593     p_block->i_dts = p_block->i_pts = date_Get( &p_sys->end_date );
 594
 595     p_block->i_length = date_Increment( &p_sys->end_date, i_samples ) - p_block->i_pts;
 596
 597     return p_block;
 598 }
 599
 600 /*****************************************************************************
 601  * ParseVorbisComments
 602  *****************************************************************************/
 603 static void ParseVorbisComments( decoder_t *p_dec )
 604 {
 605     char *psz_name, *psz_value, *psz_comment;
 606     int i = 0;
 607
 608     decoder_sys_t *p_sys = p_dec->p_sys;
 609
 610     while( i < p_sys->vc.comments )
 611     {
 612         psz_comment = strdup( p_sys->vc.user_comments[i] );
 613         if( !psz_comment )
 614             break;
 615         psz_name = psz_comment;
 616         psz_value = strchr( psz_comment, '=' );
 617         /* Don't add empty values */
 618         if( psz_value && psz_value[1] != '\0')
 619         {
 620             *psz_value = '\0';
 621             psz_value++;
 622
 623             if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_GAIN" ) ||
 624                 !strcasecmp( psz_name, "RG_RADIO" ) )
 625             {
 626                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 627
 628                 r->pb_gain[AUDIO_REPLAY_GAIN_TRACK] = true;
 629                 r->pf_gain[AUDIO_REPLAY_GAIN_TRACK] = us_atof( psz_value );
 630             }
 631             else if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_PEAK" ) ||
 632                      !strcasecmp( psz_name, "RG_PEAK" ) )
 633             {
 634                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 635
 636                 r->pb_peak[AUDIO_REPLAY_GAIN_TRACK] = true;
 637                 r->pf_peak[AUDIO_REPLAY_GAIN_TRACK] = us_atof( psz_value );
 638             }
 639             else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_GAIN" ) ||
 640                      !strcasecmp( psz_name, "RG_AUDIOPHILE" ) )
 641             {
 642                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 643
 644                 r->pb_gain[AUDIO_REPLAY_GAIN_ALBUM] = true;
 645                 r->pf_gain[AUDIO_REPLAY_GAIN_ALBUM] = us_atof( psz_value );
 646             }
 647             else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_PEAK" ) )
 648             {
 649                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 650
 651                 r->pb_peak[AUDIO_REPLAY_GAIN_ALBUM] = true;
 652                 r->pf_peak[AUDIO_REPLAY_GAIN_ALBUM] = us_atof( psz_value );
 653             }
 654             else if( !strcasecmp( psz_name, "METADATA_BLOCK_PICTURE" ) )
 655             { /* Do nothing, for now */ }
 656             else
 657             {
 658                 if( !p_dec->p_description )
 659                     p_dec->p_description = vlc_meta_New();
 660                 if( p_dec->p_description )
 661                     vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
 662             }
 663
 664         }
 665         free( psz_comment );
 666         i++;
 667     }
 668 }
 669
 670 /*****************************************************************************
 671  *
 672  *****************************************************************************/
 673 static void ConfigureChannelOrder(uint8_t *pi_chan_table, int i_channels,
 674                                   uint32_t i_channel_mask)
 675 {
 676     const uint32_t *pi_channels_in;
 677     switch( i_channels )
 678     {
 679         case 8:
 680             pi_channels_in = pi_8channels_in;
 681             break;
 682         case 7:
 683             pi_channels_in = pi_7channels_in;
 684             break;
 685         case 6:
 686         case 5:
 687             pi_channels_in = pi_6channels_in;
 688             break;
 689         case 4:
 690             pi_channels_in = pi_4channels_in;
 691             break;
 692         case 3:
 693             pi_channels_in = pi_3channels_in;
 694             break;
 695         default:
 696             for( int i = 0; i< i_channels; ++i )
 697                 pi_chan_table[i] = i;
 698
 699             return;
 700     }
 701
 702     aout_CheckChannelReorder( pi_channels_in, NULL,
 703                               i_channel_mask, pi_chan_table );
 704 }
 705
 706 /*****************************************************************************
 707  * CloseDecoder: vorbis decoder destruction
 708  *****************************************************************************/
 709 static void CloseDecoder( vlc_object_t *p_this )
 710 {
 711     decoder_t *p_dec = (decoder_t *)p_this;
 712     decoder_sys_t *p_sys = p_dec->p_sys;
 713
 714     if( !p_sys->b_packetizer && p_sys->b_has_headers )
 715     {
 716         vorbis_block_clear( &p_sys->vb );
 717         vorbis_dsp_clear( &p_sys->vd );
 718     }
 719
 720     vorbis_comment_clear( &p_sys->vc );
 721     vorbis_info_clear( &p_sys->vi );  /* must be called last */
 722
 723     free( p_sys );
 724 }
 725
 726 #ifdef HAVE_VORBIS_ENCODER
 727 /*****************************************************************************
 728  * encoder_sys_t : vorbis encoder descriptor
 729  *****************************************************************************/
 730 typedef struct
 731 {
 732     /*
 733      * Vorbis properties
 734      */
 735     vorbis_info      vi; /* struct that stores all the static vorbis bitstream
 736                             settings */
 737     vorbis_comment   vc; /* struct that stores all the bitstream user
 738                           * comments */
 739     vorbis_dsp_state vd; /* central working state for the packet->PCM
 740                           * decoder */
 741     vorbis_block     vb; /* local working space for packet->PCM decode */
 742
 743     int i_last_block_size;
 744     int i_samples_delay;
 745
 746     /*
 747     ** Channel reordering
 748     */
 749     uint8_t pi_chan_table[AOUT_CHAN_MAX];
 750
 751 } encoder_sys_t;
 752
 753 /*****************************************************************************
 754  * OpenEncoder: probe the encoder and return score
 755  *****************************************************************************/
 756 static int OpenEncoder( vlc_object_t *p_this )
 757 {
 758     encoder_t *p_enc = (encoder_t *)p_this;
 759     encoder_sys_t *p_sys;
 760     int i_quality, i_min_bitrate, i_max_bitrate;
 761     ogg_packet header[3];
 762
 763     if( p_enc->fmt_out.i_codec != VLC_CODEC_VORBIS &&
 764         !p_enc->obj.force )
 765     {
 766         return VLC_EGENERIC;
 767     }
 768
 769     /* Allocate the memory needed to store the decoder's structure */
 770     if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
 771         return VLC_ENOMEM;
 772     p_enc->p_sys = p_sys;
 773
 774     p_enc->pf_encode_audio = Encode;
 775     p_enc->fmt_in.i_codec  = VLC_CODEC_FL32;
 776     p_enc->fmt_out.i_codec = VLC_CODEC_VORBIS;
 777
 778     if( p_enc->fmt_in.audio.i_channels >= ARRAY_SIZE(pi_channels_maps) )
 779     {
 780         p_enc->fmt_in.audio.i_channels = ARRAY_SIZE(pi_channels_maps) - 1;
 781         msg_Warn( p_enc, "lowering channel count to %u", p_enc->fmt_in.audio.i_channels );
 782     }
 783     config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
 784
 785     i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" );
 786     if( i_quality > 10 ) i_quality = 10;
 787     if( i_quality < 0 ) i_quality = 0;
 788
 789     if( var_GetBool( p_enc, ENC_CFG_PREFIX "cbr" ) ) i_quality = 0;
 790     i_max_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "max-bitrate" );
 791     i_min_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "min-bitrate" );
 792
 793     /* Initialize vorbis encoder */
 794     vorbis_info_init( &p_sys->vi );
 795
 796     if( i_quality > 0 )
 797     {
 798         /* VBR mode */
 799         if( vorbis_encode_setup_vbr( &p_sys->vi,
 800               p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
 801               i_quality * 0.1 ) )
 802         {
 803             vorbis_info_clear( &p_sys->vi );
 804             free( p_enc->p_sys );
 805             msg_Err( p_enc, "VBR mode initialisation failed %"PRIu8"x(%uHz,q=%d)",
 806                      p_enc->fmt_in.audio.i_channels,
 807                      p_enc->fmt_in.audio.i_rate, i_quality );
 808             return VLC_EGENERIC;
 809         }
 810
 811         /* Do we have optional hard quality restrictions? */
 812         if( i_max_bitrate > 0 || i_min_bitrate > 0 )
 813         {
 814             struct ovectl_ratemanage_arg ai;
 815             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai );
 816
 817             ai.bitrate_hard_min = i_min_bitrate;
 818             ai.bitrate_hard_max = i_max_bitrate;
 819             ai.management_active = 1;
 820
 821             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai );
 822
 823         }
 824         else
 825         {
 826             /* Turn off management entirely */
 827             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL );
 828         }
 829     }
 830     else
 831     {
 832         if( vorbis_encode_setup_managed( &p_sys->vi,
 833               p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
 834               i_min_bitrate > 0 ? i_min_bitrate * 1000: -1,
 835               p_enc->fmt_out.i_bitrate,
 836               i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) )
 837           {
 838               vorbis_info_clear( &p_sys->vi );
 839               msg_Err( p_enc, "CBR mode initialisation failed %"PRIu8"x(%uHz,r=%u)",
 840                        p_enc->fmt_in.audio.i_channels,
 841                        p_enc->fmt_in.audio.i_rate,
 842                        p_enc->fmt_out.i_bitrate);
 843               free( p_enc->p_sys );
 844               return VLC_EGENERIC;
 845           }
 846     }
 847
 848     vorbis_encode_setup_init( &p_sys->vi );
 849
 850     /* Add a comment */
 851     vorbis_comment_init( &p_sys->vc);
 852     vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player");
 853
 854     /* Set up the analysis state and auxiliary encoding storage */
 855     vorbis_analysis_init( &p_sys->vd, &p_sys->vi );
 856     vorbis_block_init( &p_sys->vd, &p_sys->vb );
 857
 858     /* Create and store headers */
 859     vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc,
 860                                &header[0], &header[1], &header[2]);
 861     for( int i = 0; i < 3; i++ )
 862     {
 863         if( xiph_AppendHeaders( &p_enc->fmt_out.i_extra, &p_enc->fmt_out.p_extra,
 864                                 header[i].bytes, header[i].packet ) )
 865         {
 866             p_enc->fmt_out.i_extra = 0;
 867             p_enc->fmt_out.p_extra = NULL;
 868         }
 869     }
 870
 871     assert(p_sys->vi.channels > 0 && (size_t) p_sys->vi.channels < ARRAY_SIZE(pi_channels_maps) );
 872
 873     p_enc->fmt_out.audio.i_channels = p_enc->fmt_in.audio.i_channels =
 874         p_sys->vi.channels;
 875
 876     p_enc->fmt_out.audio.i_physical_channels =
 877     p_enc->fmt_in.audio.i_physical_channels =
 878         pi_channels_maps[p_sys->vi.channels];
 879
 880     p_sys->i_last_block_size = 0;
 881     p_sys->i_samples_delay = 0;
 882
 883     ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
 884             p_enc->fmt_in.audio.i_physical_channels);
 885
 886     return VLC_SUCCESS;
 887 }
 888
 889 /****************************************************************************
 890  * Encode: the whole thing
 891  ****************************************************************************
 892  * This function spits out ogg packets.
 893  ****************************************************************************/
 894 static block_t *Encode( encoder_t *p_enc, block_t *p_aout_buf )
 895 {
 896     encoder_sys_t *p_sys = p_enc->p_sys;
 897     ogg_packet oggpacket;
 898     block_t *p_block, *p_chain = NULL;
 899     float **buffer;
 900
 901     /* Packets are already flushed, see bellow. */
 902     if( unlikely( !p_aout_buf ) ) return NULL;
 903
 904     vlc_tick_t i_pts = p_aout_buf->i_pts -
 905                 CLOCK_FREQ * (vlc_tick_t)p_sys->i_samples_delay /
 906                 (vlc_tick_t)p_enc->fmt_in.audio.i_rate;
 907
 908     p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
 909
 910     buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples );
 911
 912     /* convert samples to float and uninterleave */
 913     const unsigned i_channels = p_enc->fmt_in.audio.i_channels;
 914     for( unsigned int i = 0; i < i_channels; i++ )
 915     {
 916         for( unsigned int j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
 917         {
 918             buffer[i][j]= ((float *)p_aout_buf->p_buffer)
 919                                     [j * i_channels + p_sys->pi_chan_table[i]];
 920         }
 921     }
 922
 923     vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples );
 924
 925     while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 )
 926     {
 927         int i_samples;
 928
 929         vorbis_analysis( &p_sys->vb, NULL );
 930         vorbis_bitrate_addblock( &p_sys->vb );
 931
 932         while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) )
 933         {
 934             int i_block_size;
 935             p_block = block_Alloc( oggpacket.bytes );
 936             memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
 937
 938             i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket );
 939
 940             if( i_block_size < 0 ) i_block_size = 0;
 941             i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
 942             p_sys->i_last_block_size = i_block_size;
 943
 944             p_block->i_length = CLOCK_FREQ *
 945                 (vlc_tick_t)i_samples / (vlc_tick_t)p_enc->fmt_in.audio.i_rate;
 946
 947             p_block->i_dts = p_block->i_pts = i_pts;
 948
 949             p_sys->i_samples_delay -= i_samples;
 950
 951             /* Update pts */
 952             i_pts += p_block->i_length;
 953             block_ChainAppend( &p_chain, p_block );
 954         }
 955     }
 956
 957     return p_chain;
 958 }
 959
 960 /*****************************************************************************
 961  * CloseEncoder: vorbis encoder destruction
 962  *****************************************************************************/
 963 static void CloseEncoder( vlc_object_t *p_this )
 964 {
 965     encoder_t *p_enc = (encoder_t *)p_this;
 966     encoder_sys_t *p_sys = p_enc->p_sys;
 967
 968     vorbis_block_clear( &p_sys->vb );
 969     vorbis_dsp_clear( &p_sys->vd );
 970     vorbis_comment_clear( &p_sys->vc );
 971     vorbis_info_clear( &p_sys->vi );  /* must be called last */
 972
 973     free( p_sys );
 974 }
 975
 976 #endif /* HAVE_VORBIS_ENCODER */