modules/codec/vorbis.c

   1 /*****************************************************************************
   2  * vorbis.c: vorbis decoder/encoder/packetizer module using of libvorbis.
   3  *****************************************************************************
   4  * Copyright (C) 2001-2003 the VideoLAN team
   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
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 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 General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, 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_aout.h>
  38 #include <vlc_input.h>
  39 #include <vlc_sout.h>
  40 #include "../demux/xiph.h"
  41
  42 #include <ogg/ogg.h>
  43
  44 #ifdef MODULE_NAME_IS_tremor
  45 #include <tremor/ivorbiscodec.h>
  46
  47 #else
  48 #include <vorbis/vorbisenc.h>
  49
  50 # ifndef OV_ECTL_RATEMANAGE_AVG
  51 #   define OV_ECTL_RATEMANAGE_AVG 0x0
  52 # endif
  53
  54 #endif
  55
  56 /*****************************************************************************
  57  * decoder_sys_t : vorbis decoder descriptor
  58  *****************************************************************************/
  59 struct decoder_sys_t
  60 {
  61     /* Module mode */
  62     bool b_packetizer;
  63
  64     bool            b_has_headers;
  65
  66     /*
  67      * Vorbis properties
  68      */
  69     vorbis_info      vi; /* struct that stores all the static vorbis bitstream
  70                             settings */
  71     vorbis_comment   vc; /* struct that stores all the bitstream user
  72                           * comments */
  73     vorbis_dsp_state vd; /* central working state for the packet->PCM
  74                           * decoder */
  75     vorbis_block     vb; /* local working space for packet->PCM decode */
  76
  77     /*
  78      * Common properties
  79      */
  80     date_t       end_date;
  81     int          i_last_block_size;
  82
  83     /*
  84     ** Channel reordering
  85     */
  86     int pi_chan_table[AOUT_CHAN_MAX];
  87 };
  88
  89 static const int pi_channels_maps[9] =
  90 {
  91     0,
  92     AOUT_CHAN_CENTER,
  93     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
  94     AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
  95     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
  96      | AOUT_CHAN_REARRIGHT,
  97     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
  98      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
  99     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 100      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE,
 101     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 102      | AOUT_CHAN_REARCENTER | AOUT_CHAN_MIDDLELEFT
 103      | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE,
 104     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT
 105      | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
 106      | AOUT_CHAN_LFE,
 107 };
 108
 109 /*
 110 **  channel order as defined in http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9
 111 */
 112
 113 /* recommended vorbis channel order for 8 channels */
 114 static const uint32_t pi_8channels_in[] =
 115 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
 116   AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 117   AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,AOUT_CHAN_LFE,0 };
 118
 119 /* recommended vorbis channel order for 7 channels */
 120 static const uint32_t pi_7channels_in[] =
 121 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
 122   AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 123   AOUT_CHAN_REARCENTER,AOUT_CHAN_LFE,0 };
 124
 125 /* recommended vorbis channel order for 6 channels */
 126 static const uint32_t pi_6channels_in[] =
 127 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
 128   AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,AOUT_CHAN_LFE,0 };
 129
 130 /* recommended vorbis channel order for 4 channels */
 131 static const uint32_t pi_4channels_in[] =
 132 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
 133
 134 /* recommended vorbis channel order for 3 channels */
 135 static const uint32_t pi_3channels_in[] =
 136 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, 0 };
 137
 138 /****************************************************************************
 139  * Local prototypes
 140  ****************************************************************************/
 141 static int  OpenDecoder   ( vlc_object_t * );
 142 static int  OpenPacketizer( vlc_object_t * );
 143 static void CloseDecoder  ( vlc_object_t * );
 144 static void *DecodeBlock  ( decoder_t *, block_t ** );
 145
 146 static int  ProcessHeaders( decoder_t * );
 147 static void *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
 148
 149 static aout_buffer_t *DecodePacket  ( decoder_t *, ogg_packet * );
 150 static block_t *SendPacket( decoder_t *, ogg_packet *, block_t * );
 151
 152 static void ParseVorbisComments( decoder_t * );
 153
 154 static void ConfigureChannelOrder(int *, int, uint32_t, bool );
 155
 156 #ifdef MODULE_NAME_IS_tremor
 157 static void Interleave   ( int32_t *, const int32_t **, int, int, int * );
 158 #else
 159 static void Interleave   ( float *, const float **, int, int, int * );
 160 #endif
 161
 162 #ifndef MODULE_NAME_IS_tremor
 163 static int OpenEncoder   ( vlc_object_t * );
 164 static void CloseEncoder ( vlc_object_t * );
 165 static block_t *Encode   ( encoder_t *, aout_buffer_t * );
 166 #endif
 167
 168 /*****************************************************************************
 169  * Module descriptor
 170  *****************************************************************************/
 171 #define ENC_QUALITY_TEXT N_("Encoding quality")
 172 #define ENC_QUALITY_LONGTEXT N_( \
 173   "Enforce a quality between 1 (low) and 10 (high), instead " \
 174   "of specifying a particular bitrate. This will produce a VBR stream." )
 175 #define ENC_MAXBR_TEXT N_("Maximum encoding bitrate")
 176 #define ENC_MAXBR_LONGTEXT N_( \
 177   "Maximum bitrate in kbps. This is useful for streaming applications." )
 178 #define ENC_MINBR_TEXT N_("Minimum encoding bitrate")
 179 #define ENC_MINBR_LONGTEXT N_( \
 180   "Minimum bitrate in kbps. This is useful for encoding for a fixed-size channel." )
 181 #define ENC_CBR_TEXT N_("CBR encoding")
 182 #define ENC_CBR_LONGTEXT N_( \
 183   "Force a constant bitrate encoding (CBR)." )
 184
 185 vlc_module_begin ()
 186     set_shortname( "Vorbis" )
 187     set_description( N_("Vorbis audio decoder") )
 188 #ifdef MODULE_NAME_IS_tremor
 189     set_capability( "decoder", 90 )
 190 #else
 191     set_capability( "decoder", 100 )
 192 #endif
 193     set_category( CAT_INPUT )
 194     set_subcategory( SUBCAT_INPUT_ACODEC )
 195     set_callbacks( OpenDecoder, CloseDecoder )
 196
 197     add_submodule ()
 198     set_description( N_("Vorbis audio packetizer") )
 199     set_capability( "packetizer", 100 )
 200     set_callbacks( OpenPacketizer, CloseDecoder )
 201
 202 #ifndef MODULE_NAME_IS_tremor
 203 #   define ENC_CFG_PREFIX "sout-vorbis-"
 204     add_submodule ()
 205     set_description( N_("Vorbis audio encoder") )
 206     set_capability( "encoder", 130 )
 207     set_callbacks( OpenEncoder, CloseEncoder )
 208
 209     add_integer( ENC_CFG_PREFIX "quality", 0, ENC_QUALITY_TEXT,
 210                  ENC_QUALITY_LONGTEXT, false )
 211         change_integer_range( 0, 10 )
 212     add_integer( ENC_CFG_PREFIX "max-bitrate", 0, ENC_MAXBR_TEXT,
 213                  ENC_MAXBR_LONGTEXT, false )
 214     add_integer( ENC_CFG_PREFIX "min-bitrate", 0, ENC_MINBR_TEXT,
 215                  ENC_MINBR_LONGTEXT, false )
 216     add_bool( ENC_CFG_PREFIX "cbr", false, ENC_CBR_TEXT,
 217                  ENC_CBR_LONGTEXT, false )
 218 #endif
 219
 220 vlc_module_end ()
 221
 222 #ifndef MODULE_NAME_IS_tremor
 223 static const char *const ppsz_enc_options[] = {
 224     "quality", "max-bitrate", "min-bitrate", "cbr", NULL
 225 };
 226 #endif
 227
 228 /*****************************************************************************
 229  * OpenDecoder: probe the decoder and return score
 230  *****************************************************************************/
 231 static int OpenDecoder( vlc_object_t *p_this )
 232 {
 233     decoder_t *p_dec = (decoder_t*)p_this;
 234     decoder_sys_t *p_sys;
 235
 236     if( p_dec->fmt_in.i_codec != VLC_CODEC_VORBIS )
 237     {
 238         return VLC_EGENERIC;
 239     }
 240
 241     /* Allocate the memory needed to store the decoder's structure */
 242     if( ( p_dec->p_sys = p_sys = malloc( sizeof(*p_sys) ) ) == NULL )
 243         return VLC_ENOMEM;
 244
 245     /* Misc init */
 246     date_Set( &p_sys->end_date, 0 );
 247     p_sys->i_last_block_size = 0;
 248     p_sys->b_packetizer = false;
 249     p_sys->b_has_headers = false;
 250
 251     /* Take care of vorbis init */
 252     vorbis_info_init( &p_sys->vi );
 253     vorbis_comment_init( &p_sys->vc );
 254
 255     /* Set output properties */
 256     p_dec->fmt_out.i_cat = AUDIO_ES;
 257 #ifdef MODULE_NAME_IS_tremor
 258     p_dec->fmt_out.i_codec = VLC_CODEC_FI32;
 259 #else
 260     p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
 261 #endif
 262
 263     /* Set callbacks */
 264     p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
 265         DecodeBlock;
 266     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 267         DecodeBlock;
 268
 269     return VLC_SUCCESS;
 270 }
 271
 272 static int OpenPacketizer( vlc_object_t *p_this )
 273 {
 274     decoder_t *p_dec = (decoder_t*)p_this;
 275
 276     int i_ret = OpenDecoder( p_this );
 277
 278     if( i_ret == VLC_SUCCESS )
 279     {
 280         p_dec->p_sys->b_packetizer = true;
 281         p_dec->fmt_out.i_codec = VLC_CODEC_VORBIS;
 282     }
 283
 284     return i_ret;
 285 }
 286
 287 /****************************************************************************
 288  * DecodeBlock: the whole thing
 289  ****************************************************************************
 290  * This function must be fed with ogg packets.
 291  ****************************************************************************/
 292 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 293 {
 294     decoder_sys_t *p_sys = p_dec->p_sys;
 295     ogg_packet oggpacket;
 296
 297     if( !pp_block ) return NULL;
 298
 299     if( *pp_block )
 300     {
 301         /* Block to Ogg packet */
 302         oggpacket.packet = (*pp_block)->p_buffer;
 303         oggpacket.bytes = (*pp_block)->i_buffer;
 304     }
 305     else
 306     {
 307         if( p_sys->b_packetizer ) return NULL;
 308
 309         /* Block to Ogg packet */
 310         oggpacket.packet = NULL;
 311         oggpacket.bytes = 0;
 312     }
 313
 314     oggpacket.granulepos = -1;
 315     oggpacket.b_o_s = 0;
 316     oggpacket.e_o_s = 0;
 317     oggpacket.packetno = 0;
 318
 319     /* Check for headers */
 320     if( !p_sys->b_has_headers )
 321     {
 322         if( ProcessHeaders( p_dec ) )
 323         {
 324             block_Release( *pp_block );
 325             return NULL;
 326         }
 327         p_sys->b_has_headers = true;
 328     }
 329
 330     return ProcessPacket( p_dec, &oggpacket, pp_block );
 331 }
 332
 333 /*****************************************************************************
 334  * ProcessHeaders: process Vorbis headers.
 335  *****************************************************************************/
 336 static int ProcessHeaders( decoder_t *p_dec )
 337 {
 338     decoder_sys_t *p_sys = p_dec->p_sys;
 339     ogg_packet oggpacket;
 340
 341     unsigned pi_size[XIPH_MAX_HEADER_COUNT];
 342     void     *pp_data[XIPH_MAX_HEADER_COUNT];
 343     unsigned i_count;
 344     if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
 345                            p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) )
 346         return VLC_EGENERIC;
 347     if( i_count < 3 )
 348         goto error;
 349
 350     oggpacket.granulepos = -1;
 351     oggpacket.e_o_s = 0;
 352     oggpacket.packetno = 0;
 353
 354     /* Take care of the initial Vorbis header */
 355     oggpacket.b_o_s  = 1; /* yes this actually is a b_o_s packet :) */
 356     oggpacket.bytes  = pi_size[0];
 357     oggpacket.packet = pp_data[0];
 358     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 359     {
 360         msg_Err( p_dec, "this bitstream does not contain Vorbis audio data");
 361         goto error;
 362     }
 363
 364     /* Setup the format */
 365     p_dec->fmt_out.audio.i_rate     = p_sys->vi.rate;
 366     p_dec->fmt_out.audio.i_channels = p_sys->vi.channels;
 367
 368     if( p_dec->fmt_out.audio.i_channels > 9 )
 369     {
 370         msg_Err( p_dec, "invalid number of channels (not between 1 and 9): %i",
 371                  p_dec->fmt_out.audio.i_channels );
 372         goto error;
 373     }
 374
 375     p_dec->fmt_out.audio.i_physical_channels =
 376         p_dec->fmt_out.audio.i_original_channels =
 377             pi_channels_maps[p_sys->vi.channels];
 378     p_dec->fmt_out.i_bitrate = p_sys->vi.bitrate_nominal;
 379
 380     date_Init( &p_sys->end_date, p_sys->vi.rate, 1 );
 381
 382     msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ld",
 383              p_sys->vi.channels, p_sys->vi.rate, p_sys->vi.bitrate_nominal );
 384
 385     /* The next packet in order is the comments header */
 386     oggpacket.b_o_s  = 0;
 387     oggpacket.bytes  = pi_size[1];
 388     oggpacket.packet = pp_data[1];
 389     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 390     {
 391         msg_Err( p_dec, "2nd Vorbis header is corrupted" );
 392         goto error;
 393     }
 394     ParseVorbisComments( p_dec );
 395
 396     /* The next packet in order is the codebooks header
 397      * We need to watch out that this packet is not missing as a
 398      * missing or corrupted header is fatal. */
 399     oggpacket.b_o_s  = 0;
 400     oggpacket.bytes  = pi_size[2];
 401     oggpacket.packet = pp_data[2];
 402     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 403     {
 404         msg_Err( p_dec, "3rd Vorbis header is corrupted" );
 405         return VLC_EGENERIC;
 406     }
 407
 408     if( !p_sys->b_packetizer )
 409     {
 410         /* Initialize the Vorbis packet->PCM decoder */
 411         vorbis_synthesis_init( &p_sys->vd, &p_sys->vi );
 412         vorbis_block_init( &p_sys->vd, &p_sys->vb );
 413     }
 414     else
 415     {
 416         p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
 417         p_dec->fmt_out.p_extra = xrealloc( p_dec->fmt_out.p_extra,
 418                                            p_dec->fmt_out.i_extra );
 419         memcpy( p_dec->fmt_out.p_extra,
 420                 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
 421     }
 422
 423     ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
 424             p_dec->fmt_out.audio.i_physical_channels, true);
 425
 426     for( unsigned i = 0; i < i_count; i++ )
 427         free( pp_data[i] );
 428     return VLC_SUCCESS;
 429
 430 error:
 431     for( unsigned i = 0; i < i_count; i++ )
 432         free( pp_data[i] );
 433     return VLC_EGENERIC;
 434 }
 435
 436 /*****************************************************************************
 437  * ProcessPacket: processes a Vorbis packet.
 438  *****************************************************************************/
 439 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
 440                             block_t **pp_block )
 441 {
 442     decoder_sys_t *p_sys = p_dec->p_sys;
 443     block_t *p_block = *pp_block;
 444
 445     /* Date management */
 446     if( p_block && p_block->i_pts > VLC_TS_INVALID &&
 447         p_block->i_pts != date_Get( &p_sys->end_date ) )
 448     {
 449         date_Set( &p_sys->end_date, p_block->i_pts );
 450     }
 451
 452     if( !date_Get( &p_sys->end_date ) )
 453     {
 454         /* We've just started the stream, wait for the first PTS. */
 455         if( p_block ) block_Release( p_block );
 456         return NULL;
 457     }
 458
 459     *pp_block = NULL; /* To avoid being fed the same packet again */
 460
 461     if( p_sys->b_packetizer )
 462     {
 463         return SendPacket( p_dec, p_oggpacket, p_block );
 464     }
 465     else
 466     {
 467         aout_buffer_t *p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
 468         if( p_block )
 469             block_Release( p_block );
 470         return p_aout_buffer;
 471     }
 472 }
 473
 474 /*****************************************************************************
 475  * DecodePacket: decodes a Vorbis packet.
 476  *****************************************************************************/
 477 static aout_buffer_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
 478 {
 479     decoder_sys_t *p_sys = p_dec->p_sys;
 480     int           i_samples;
 481
 482 #ifdef MODULE_NAME_IS_tremor
 483     int32_t       **pp_pcm;
 484 #else
 485     float         **pp_pcm;
 486 #endif
 487
 488     if( p_oggpacket->bytes &&
 489         vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 )
 490         vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb );
 491
 492     /* **pp_pcm is a multichannel float vector. In stereo, for
 493      * example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is
 494      * the size of each channel. Convert the float values
 495      * (-1.<=range<=1.) to whatever PCM format and write it out */
 496
 497     if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 )
 498     {
 499
 500         aout_buffer_t *p_aout_buffer;
 501
 502         p_aout_buffer =
 503             decoder_NewAudioBuffer( p_dec, i_samples );
 504
 505         if( p_aout_buffer == NULL ) return NULL;
 506
 507         /* Interleave the samples */
 508 #ifdef MODULE_NAME_IS_tremor
 509         Interleave( (int32_t *)p_aout_buffer->p_buffer,
 510                     (const int32_t **)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table);
 511 #else
 512         Interleave( (float *)p_aout_buffer->p_buffer,
 513                     (const float **)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table);
 514 #endif
 515
 516         /* Tell libvorbis how many samples we actually consumed */
 517         vorbis_synthesis_read( &p_sys->vd, i_samples );
 518
 519         /* Date management */
 520         p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
 521         p_aout_buffer->i_length = date_Increment( &p_sys->end_date,
 522                                            i_samples ) - p_aout_buffer->i_pts;
 523         return p_aout_buffer;
 524     }
 525     else
 526     {
 527         return NULL;
 528     }
 529 }
 530
 531 /*****************************************************************************
 532  * SendPacket: send an ogg dated packet to the stream output.
 533  *****************************************************************************/
 534 static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
 535                             block_t *p_block )
 536 {
 537     decoder_sys_t *p_sys = p_dec->p_sys;
 538     int i_block_size, i_samples;
 539
 540     i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket );
 541     if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */
 542     i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
 543     p_sys->i_last_block_size = i_block_size;
 544
 545     /* Date management */
 546     p_block->i_dts = p_block->i_pts = date_Get( &p_sys->end_date );
 547
 548     p_block->i_length = date_Increment( &p_sys->end_date, i_samples ) - p_block->i_pts;
 549
 550     return p_block;
 551 }
 552
 553 /*****************************************************************************
 554  * ParseVorbisComments
 555  *****************************************************************************/
 556 static void ParseVorbisComments( decoder_t *p_dec )
 557 {
 558     char *psz_name, *psz_value, *psz_comment;
 559     int i = 0;
 560
 561     while( i < p_dec->p_sys->vc.comments )
 562     {
 563         psz_comment = strdup( p_dec->p_sys->vc.user_comments[i] );
 564         if( !psz_comment )
 565             break;
 566         psz_name = psz_comment;
 567         psz_value = strchr( psz_comment, '=' );
 568         if( psz_value )
 569         {
 570             *psz_value = '\0';
 571             psz_value++;
 572
 573             if( !p_dec->p_description )
 574                 p_dec->p_description = vlc_meta_New();
 575             if( p_dec->p_description )
 576                 vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
 577
 578             if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_GAIN" ) ||
 579                      !strcasecmp( psz_name, "RG_RADIO" ) )
 580             {
 581                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 582
 583                 r->pb_gain[AUDIO_REPLAY_GAIN_TRACK] = true;
 584                 r->pf_gain[AUDIO_REPLAY_GAIN_TRACK] = atof( psz_value );
 585             }
 586             else if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_PEAK" ) ||
 587                      !strcasecmp( psz_name, "RG_PEAK" ) )
 588             {
 589                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 590
 591                 r->pb_peak[AUDIO_REPLAY_GAIN_TRACK] = true;
 592                 r->pf_peak[AUDIO_REPLAY_GAIN_TRACK] = atof( psz_value );
 593             }
 594             else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_GAIN" ) ||
 595                      !strcasecmp( psz_name, "RG_AUDIOPHILE" ) )
 596             {
 597                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 598
 599                 r->pb_gain[AUDIO_REPLAY_GAIN_ALBUM] = true;
 600                 r->pf_gain[AUDIO_REPLAY_GAIN_ALBUM] = atof( psz_value );
 601             }
 602             else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_PEAK" ) )
 603             {
 604                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 605
 606                 r->pb_peak[AUDIO_REPLAY_GAIN_ALBUM] = true;
 607                 r->pf_peak[AUDIO_REPLAY_GAIN_ALBUM] = atof( psz_value );
 608             }
 609         }
 610         free( psz_comment );
 611         i++;
 612     }
 613 }
 614
 615 /*****************************************************************************
 616  * Interleave: helper function to interleave channels
 617  *****************************************************************************/
 618 static void ConfigureChannelOrder(int *pi_chan_table, int i_channels, uint32_t i_channel_mask, bool b_decode)
 619 {
 620     const uint32_t *pi_channels_in;
 621     switch( i_channels )
 622     {
 623         case 8:
 624             pi_channels_in = pi_8channels_in;
 625             break;
 626         case 7:
 627             pi_channels_in = pi_7channels_in;
 628             break;
 629         case 6:
 630         case 5:
 631             pi_channels_in = pi_6channels_in;
 632             break;
 633         case 4:
 634             pi_channels_in = pi_4channels_in;
 635             break;
 636         case 3:
 637             pi_channels_in = pi_3channels_in;
 638             break;
 639         default:
 640             {
 641                 int i;
 642                 for( i = 0; i< i_channels; ++i )
 643                 {
 644                     pi_chan_table[i] = i;
 645                 }
 646                 return;
 647             }
 648     }
 649
 650     if( b_decode )
 651         aout_CheckChannelReorder( pi_channels_in, NULL,
 652                                   i_channel_mask & AOUT_CHAN_PHYSMASK,
 653                                   i_channels,
 654                                   pi_chan_table );
 655     else
 656         aout_CheckChannelReorder( NULL, pi_channels_in,
 657                                   i_channel_mask & AOUT_CHAN_PHYSMASK,
 658                                   i_channels,
 659                                   pi_chan_table );
 660 }
 661
 662 /*****************************************************************************
 663  * Interleave: helper function to interleave channels
 664  *****************************************************************************/
 665 #ifdef MODULE_NAME_IS_tremor
 666 static void Interleave( int32_t *p_out, const int32_t **pp_in,
 667                         int i_nb_channels, int i_samples, int *pi_chan_table)
 668 {
 669     int i, j;
 670
 671     for ( j = 0; j < i_samples; j++ )
 672         for ( i = 0; i < i_nb_channels; i++ )
 673             p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j] * (FIXED32_ONE >> 24);
 674 }
 675 #else
 676 static void Interleave( float *p_out, const float **pp_in,
 677                         int i_nb_channels, int i_samples, int *pi_chan_table )
 678 {
 679     int i, j;
 680
 681     for ( j = 0; j < i_samples; j++ )
 682         for ( i = 0; i < i_nb_channels; i++ )
 683             p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j];
 684 }
 685 #endif
 686
 687 /*****************************************************************************
 688  * CloseDecoder: vorbis decoder destruction
 689  *****************************************************************************/
 690 static void CloseDecoder( vlc_object_t *p_this )
 691 {
 692     decoder_t *p_dec = (decoder_t *)p_this;
 693     decoder_sys_t *p_sys = p_dec->p_sys;
 694
 695     if( !p_sys->b_packetizer && p_sys->b_has_headers )
 696     {
 697         vorbis_block_clear( &p_sys->vb );
 698         vorbis_dsp_clear( &p_sys->vd );
 699     }
 700
 701     vorbis_comment_clear( &p_sys->vc );
 702     vorbis_info_clear( &p_sys->vi );  /* must be called last */
 703
 704     free( p_sys );
 705 }
 706
 707 #ifndef MODULE_NAME_IS_tremor
 708
 709 /*****************************************************************************
 710  * encoder_sys_t : vorbis encoder descriptor
 711  *****************************************************************************/
 712 struct encoder_sys_t
 713 {
 714     /*
 715      * Vorbis properties
 716      */
 717     vorbis_info      vi; /* struct that stores all the static vorbis bitstream
 718                             settings */
 719     vorbis_comment   vc; /* struct that stores all the bitstream user
 720                           * comments */
 721     vorbis_dsp_state vd; /* central working state for the packet->PCM
 722                           * decoder */
 723     vorbis_block     vb; /* local working space for packet->PCM decode */
 724
 725     int i_last_block_size;
 726     int i_samples_delay;
 727     int i_channels;
 728
 729     /*
 730     ** Channel reordering
 731     */
 732     int pi_chan_table[AOUT_CHAN_MAX];
 733
 734 };
 735
 736 /*****************************************************************************
 737  * OpenEncoder: probe the encoder and return score
 738  *****************************************************************************/
 739 static int OpenEncoder( vlc_object_t *p_this )
 740 {
 741     encoder_t *p_enc = (encoder_t *)p_this;
 742     encoder_sys_t *p_sys;
 743     int i_quality, i_min_bitrate, i_max_bitrate;
 744     ogg_packet header[3];
 745
 746     if( p_enc->fmt_out.i_codec != VLC_CODEC_VORBIS &&
 747         !p_enc->b_force )
 748     {
 749         return VLC_EGENERIC;
 750     }
 751
 752     /* Allocate the memory needed to store the decoder's structure */
 753     if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
 754         return VLC_ENOMEM;
 755     p_enc->p_sys = p_sys;
 756
 757     p_enc->pf_encode_audio = Encode;
 758     p_enc->fmt_in.i_codec = VLC_CODEC_FL32;
 759     p_enc->fmt_out.i_codec = VLC_CODEC_VORBIS;
 760
 761     config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
 762
 763     i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" );
 764     if( i_quality > 10 ) i_quality = 10;
 765     if( i_quality < 0 ) i_quality = 0;
 766
 767     if( var_GetBool( p_enc, ENC_CFG_PREFIX "cbr" ) ) i_quality = 0;
 768     i_max_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "max-bitrate" );
 769     i_min_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "min-bitrate" );
 770
 771     /* Initialize vorbis encoder */
 772     vorbis_info_init( &p_sys->vi );
 773
 774     if( i_quality > 0 )
 775     {
 776         /* VBR mode */
 777         if( vorbis_encode_setup_vbr( &p_sys->vi,
 778               p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
 779               i_quality * 0.1 ) )
 780         {
 781             vorbis_info_clear( &p_sys->vi );
 782             free( p_enc->p_sys );
 783             msg_Err( p_enc, "VBR mode initialisation failed" );
 784             return VLC_EGENERIC;
 785         }
 786
 787         /* Do we have optional hard quality restrictions? */
 788         if( i_max_bitrate > 0 || i_min_bitrate > 0 )
 789         {
 790             struct ovectl_ratemanage_arg ai;
 791             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai );
 792
 793             ai.bitrate_hard_min = i_min_bitrate;
 794             ai.bitrate_hard_max = i_max_bitrate;
 795             ai.management_active = 1;
 796
 797             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai );
 798
 799         }
 800         else
 801         {
 802             /* Turn off management entirely */
 803             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL );
 804         }
 805     }
 806     else
 807     {
 808         if( vorbis_encode_setup_managed( &p_sys->vi,
 809               p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
 810               i_min_bitrate > 0 ? i_min_bitrate * 1000: -1,
 811               p_enc->fmt_out.i_bitrate,
 812               i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) )
 813           {
 814               vorbis_info_clear( &p_sys->vi );
 815               msg_Err( p_enc, "CBR mode initialisation failed" );
 816               free( p_enc->p_sys );
 817               return VLC_EGENERIC;
 818           }
 819     }
 820
 821     vorbis_encode_setup_init( &p_sys->vi );
 822
 823     /* Add a comment */
 824     vorbis_comment_init( &p_sys->vc);
 825     vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player");
 826
 827     /* Set up the analysis state and auxiliary encoding storage */
 828     vorbis_analysis_init( &p_sys->vd, &p_sys->vi );
 829     vorbis_block_init( &p_sys->vd, &p_sys->vb );
 830
 831     /* Create and store headers */
 832     vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc,
 833                                &header[0], &header[1], &header[2]);
 834     for( int i = 0; i < 3; i++ )
 835     {
 836         if( xiph_AppendHeaders( &p_enc->fmt_out.i_extra, &p_enc->fmt_out.p_extra,
 837                                 header[i].bytes, header[i].packet ) )
 838         {
 839             p_enc->fmt_out.i_extra = 0;
 840             p_enc->fmt_out.p_extra = NULL;
 841         }
 842     }
 843
 844     p_sys->i_channels = p_enc->fmt_in.audio.i_channels;
 845     p_sys->i_last_block_size = 0;
 846     p_sys->i_samples_delay = 0;
 847
 848     ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
 849             p_enc->fmt_in.audio.i_physical_channels, true);
 850
 851     return VLC_SUCCESS;
 852 }
 853
 854 /****************************************************************************
 855  * Encode: the whole thing
 856  ****************************************************************************
 857  * This function spits out ogg packets.
 858  ****************************************************************************/
 859 static block_t *Encode( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
 860 {
 861     encoder_sys_t *p_sys = p_enc->p_sys;
 862     ogg_packet oggpacket;
 863     block_t *p_block, *p_chain = NULL;
 864     float **buffer;
 865     int i;
 866     unsigned int j;
 867
 868     mtime_t i_pts = p_aout_buf->i_pts -
 869                 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
 870                 (mtime_t)p_enc->fmt_in.audio.i_rate;
 871
 872     p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
 873
 874     buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples );
 875
 876     /* convert samples to float and uninterleave */
 877     for( i = 0; i < p_sys->i_channels; i++ )
 878     {
 879         for( j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
 880         {
 881             buffer[i][j]= ((float *)p_aout_buf->p_buffer)
 882                                     [j * p_sys->i_channels + p_sys->pi_chan_table[i]];
 883         }
 884     }
 885
 886     vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples );
 887
 888     while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 )
 889     {
 890         int i_samples;
 891
 892         vorbis_analysis( &p_sys->vb, NULL );
 893         vorbis_bitrate_addblock( &p_sys->vb );
 894
 895         while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) )
 896         {
 897             int i_block_size;
 898             p_block = block_New( p_enc, oggpacket.bytes );
 899             memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
 900
 901             i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket );
 902
 903             if( i_block_size < 0 ) i_block_size = 0;
 904             i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
 905             p_sys->i_last_block_size = i_block_size;
 906
 907             p_block->i_length = (mtime_t)1000000 *
 908                 (mtime_t)i_samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
 909
 910             p_block->i_dts = p_block->i_pts = i_pts;
 911
 912             p_sys->i_samples_delay -= i_samples;
 913
 914             /* Update pts */
 915             i_pts += p_block->i_length;
 916             block_ChainAppend( &p_chain, p_block );
 917         }
 918     }
 919
 920     return p_chain;
 921 }
 922
 923 /*****************************************************************************
 924  * CloseEncoder: vorbis encoder destruction
 925  *****************************************************************************/
 926 static void CloseEncoder( vlc_object_t *p_this )
 927 {
 928     encoder_t *p_enc = (encoder_t *)p_this;
 929     encoder_sys_t *p_sys = p_enc->p_sys;
 930
 931     vorbis_block_clear( &p_sys->vb );
 932     vorbis_dsp_clear( &p_sys->vd );
 933     vorbis_comment_clear( &p_sys->vc );
 934     vorbis_info_clear( &p_sys->vi );  /* must be called last */
 935
 936     free( p_sys );
 937 }
 938
 939 #endif /* HAVE_VORBIS_VORBISENC_H && !MODULE_NAME_IS_tremor */