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 block_t *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 = DecodeBlock;
 265     p_dec->pf_packetize    = DecodeBlock;
 266
 267     return VLC_SUCCESS;
 268 }
 269
 270 static int OpenPacketizer( vlc_object_t *p_this )
 271 {
 272     decoder_t *p_dec = (decoder_t*)p_this;
 273
 274     int i_ret = OpenDecoder( p_this );
 275
 276     if( i_ret == VLC_SUCCESS )
 277     {
 278         p_dec->p_sys->b_packetizer = true;
 279         p_dec->fmt_out.i_codec = VLC_CODEC_VORBIS;
 280     }
 281
 282     return i_ret;
 283 }
 284
 285 /****************************************************************************
 286  * DecodeBlock: the whole thing
 287  ****************************************************************************
 288  * This function must be fed with ogg packets.
 289  ****************************************************************************/
 290 static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 291 {
 292     decoder_sys_t *p_sys = p_dec->p_sys;
 293     ogg_packet oggpacket;
 294
 295     if( !pp_block ) return NULL;
 296
 297     if( *pp_block )
 298     {
 299         /* Block to Ogg packet */
 300         oggpacket.packet = (*pp_block)->p_buffer;
 301         oggpacket.bytes = (*pp_block)->i_buffer;
 302     }
 303     else
 304     {
 305         if( p_sys->b_packetizer ) return NULL;
 306
 307         /* Block to Ogg packet */
 308         oggpacket.packet = NULL;
 309         oggpacket.bytes = 0;
 310     }
 311
 312     oggpacket.granulepos = -1;
 313     oggpacket.b_o_s = 0;
 314     oggpacket.e_o_s = 0;
 315     oggpacket.packetno = 0;
 316
 317     /* Check for headers */
 318     if( !p_sys->b_has_headers )
 319     {
 320         if( ProcessHeaders( p_dec ) )
 321         {
 322             block_Release( *pp_block );
 323             return NULL;
 324         }
 325         p_sys->b_has_headers = true;
 326     }
 327
 328     return ProcessPacket( p_dec, &oggpacket, pp_block );
 329 }
 330
 331 /*****************************************************************************
 332  * ProcessHeaders: process Vorbis headers.
 333  *****************************************************************************/
 334 static int ProcessHeaders( decoder_t *p_dec )
 335 {
 336     decoder_sys_t *p_sys = p_dec->p_sys;
 337     ogg_packet oggpacket;
 338
 339     unsigned pi_size[XIPH_MAX_HEADER_COUNT];
 340     void     *pp_data[XIPH_MAX_HEADER_COUNT];
 341     unsigned i_count;
 342     if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
 343                            p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) )
 344         return VLC_EGENERIC;
 345     if( i_count < 3 )
 346         goto error;
 347
 348     oggpacket.granulepos = -1;
 349     oggpacket.e_o_s = 0;
 350     oggpacket.packetno = 0;
 351
 352     /* Take care of the initial Vorbis header */
 353     oggpacket.b_o_s  = 1; /* yes this actually is a b_o_s packet :) */
 354     oggpacket.bytes  = pi_size[0];
 355     oggpacket.packet = pp_data[0];
 356     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 357     {
 358         msg_Err( p_dec, "this bitstream does not contain Vorbis audio data");
 359         goto error;
 360     }
 361
 362     /* Setup the format */
 363     p_dec->fmt_out.audio.i_rate     = p_sys->vi.rate;
 364     p_dec->fmt_out.audio.i_channels = p_sys->vi.channels;
 365
 366     if( p_dec->fmt_out.audio.i_channels > 9 )
 367     {
 368         msg_Err( p_dec, "invalid number of channels (not between 1 and 9): %i",
 369                  p_dec->fmt_out.audio.i_channels );
 370         goto error;
 371     }
 372
 373     p_dec->fmt_out.audio.i_physical_channels =
 374         p_dec->fmt_out.audio.i_original_channels =
 375             pi_channels_maps[p_sys->vi.channels];
 376     p_dec->fmt_out.i_bitrate = p_sys->vi.bitrate_nominal;
 377
 378     date_Init( &p_sys->end_date, p_sys->vi.rate, 1 );
 379
 380     msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ld",
 381              p_sys->vi.channels, p_sys->vi.rate, p_sys->vi.bitrate_nominal );
 382
 383     /* The next packet in order is the comments header */
 384     oggpacket.b_o_s  = 0;
 385     oggpacket.bytes  = pi_size[1];
 386     oggpacket.packet = pp_data[1];
 387     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 388     {
 389         msg_Err( p_dec, "2nd Vorbis header is corrupted" );
 390         goto error;
 391     }
 392     ParseVorbisComments( p_dec );
 393
 394     /* The next packet in order is the codebooks header
 395      * We need to watch out that this packet is not missing as a
 396      * missing or corrupted header is fatal. */
 397     oggpacket.b_o_s  = 0;
 398     oggpacket.bytes  = pi_size[2];
 399     oggpacket.packet = pp_data[2];
 400     if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
 401     {
 402         msg_Err( p_dec, "3rd Vorbis header is corrupted" );
 403         return VLC_EGENERIC;
 404     }
 405
 406     if( !p_sys->b_packetizer )
 407     {
 408         /* Initialize the Vorbis packet->PCM decoder */
 409         vorbis_synthesis_init( &p_sys->vd, &p_sys->vi );
 410         vorbis_block_init( &p_sys->vd, &p_sys->vb );
 411     }
 412     else
 413     {
 414         p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
 415         p_dec->fmt_out.p_extra = xrealloc( p_dec->fmt_out.p_extra,
 416                                            p_dec->fmt_out.i_extra );
 417         memcpy( p_dec->fmt_out.p_extra,
 418                 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
 419     }
 420
 421     ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
 422             p_dec->fmt_out.audio.i_physical_channels, true);
 423
 424     for( unsigned i = 0; i < i_count; i++ )
 425         free( pp_data[i] );
 426     return VLC_SUCCESS;
 427
 428 error:
 429     for( unsigned i = 0; i < i_count; i++ )
 430         free( pp_data[i] );
 431     return VLC_EGENERIC;
 432 }
 433
 434 /*****************************************************************************
 435  * ProcessPacket: processes a Vorbis packet.
 436  *****************************************************************************/
 437 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
 438                             block_t **pp_block )
 439 {
 440     decoder_sys_t *p_sys = p_dec->p_sys;
 441     block_t *p_block = *pp_block;
 442
 443     /* Date management */
 444     if( p_block && p_block->i_pts > VLC_TS_INVALID &&
 445         p_block->i_pts != date_Get( &p_sys->end_date ) )
 446     {
 447         date_Set( &p_sys->end_date, p_block->i_pts );
 448     }
 449
 450     if( !date_Get( &p_sys->end_date ) )
 451     {
 452         /* We've just started the stream, wait for the first PTS. */
 453         if( p_block ) block_Release( p_block );
 454         return NULL;
 455     }
 456
 457     *pp_block = NULL; /* To avoid being fed the same packet again */
 458
 459     if( p_sys->b_packetizer )
 460     {
 461         return SendPacket( p_dec, p_oggpacket, p_block );
 462     }
 463     else
 464     {
 465         aout_buffer_t *p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
 466         if( p_block )
 467             block_Release( p_block );
 468         return p_aout_buffer;
 469     }
 470 }
 471
 472 /*****************************************************************************
 473  * DecodePacket: decodes a Vorbis packet.
 474  *****************************************************************************/
 475 static aout_buffer_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
 476 {
 477     decoder_sys_t *p_sys = p_dec->p_sys;
 478     int           i_samples;
 479
 480 #ifdef MODULE_NAME_IS_tremor
 481     int32_t       **pp_pcm;
 482 #else
 483     float         **pp_pcm;
 484 #endif
 485
 486     if( p_oggpacket->bytes &&
 487         vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 )
 488         vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb );
 489
 490     /* **pp_pcm is a multichannel float vector. In stereo, for
 491      * example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is
 492      * the size of each channel. Convert the float values
 493      * (-1.<=range<=1.) to whatever PCM format and write it out */
 494
 495     if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 )
 496     {
 497
 498         aout_buffer_t *p_aout_buffer;
 499
 500         p_aout_buffer =
 501             decoder_NewAudioBuffer( p_dec, i_samples );
 502
 503         if( p_aout_buffer == NULL ) return NULL;
 504
 505         /* Interleave the samples */
 506 #ifdef MODULE_NAME_IS_tremor
 507         Interleave( (int32_t *)p_aout_buffer->p_buffer,
 508                     (const int32_t **)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table);
 509 #else
 510         Interleave( (float *)p_aout_buffer->p_buffer,
 511                     (const float **)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table);
 512 #endif
 513
 514         /* Tell libvorbis how many samples we actually consumed */
 515         vorbis_synthesis_read( &p_sys->vd, i_samples );
 516
 517         /* Date management */
 518         p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
 519         p_aout_buffer->i_length = date_Increment( &p_sys->end_date,
 520                                            i_samples ) - p_aout_buffer->i_pts;
 521         return p_aout_buffer;
 522     }
 523     else
 524     {
 525         return NULL;
 526     }
 527 }
 528
 529 /*****************************************************************************
 530  * SendPacket: send an ogg dated packet to the stream output.
 531  *****************************************************************************/
 532 static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
 533                             block_t *p_block )
 534 {
 535     decoder_sys_t *p_sys = p_dec->p_sys;
 536     int i_block_size, i_samples;
 537
 538     i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket );
 539     if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */
 540     i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
 541     p_sys->i_last_block_size = i_block_size;
 542
 543     /* Date management */
 544     p_block->i_dts = p_block->i_pts = date_Get( &p_sys->end_date );
 545
 546     p_block->i_length = date_Increment( &p_sys->end_date, i_samples ) - p_block->i_pts;
 547
 548     return p_block;
 549 }
 550
 551 /*****************************************************************************
 552  * ParseVorbisComments
 553  *****************************************************************************/
 554 static void ParseVorbisComments( decoder_t *p_dec )
 555 {
 556     char *psz_name, *psz_value, *psz_comment;
 557     int i = 0;
 558
 559     while( i < p_dec->p_sys->vc.comments )
 560     {
 561         psz_comment = strdup( p_dec->p_sys->vc.user_comments[i] );
 562         if( !psz_comment )
 563             break;
 564         psz_name = psz_comment;
 565         psz_value = strchr( psz_comment, '=' );
 566         if( psz_value )
 567         {
 568             *psz_value = '\0';
 569             psz_value++;
 570
 571             /* Don't add empty values */
 572             if( *psz_value == '\0' )
 573                 break;
 574
 575             if( !p_dec->p_description )
 576                 p_dec->p_description = vlc_meta_New();
 577             if( p_dec->p_description )
 578                 vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
 579
 580             if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_GAIN" ) ||
 581                      !strcasecmp( psz_name, "RG_RADIO" ) )
 582             {
 583                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 584
 585                 r->pb_gain[AUDIO_REPLAY_GAIN_TRACK] = true;
 586                 r->pf_gain[AUDIO_REPLAY_GAIN_TRACK] = atof( psz_value );
 587             }
 588             else if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_PEAK" ) ||
 589                      !strcasecmp( psz_name, "RG_PEAK" ) )
 590             {
 591                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 592
 593                 r->pb_peak[AUDIO_REPLAY_GAIN_TRACK] = true;
 594                 r->pf_peak[AUDIO_REPLAY_GAIN_TRACK] = atof( psz_value );
 595             }
 596             else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_GAIN" ) ||
 597                      !strcasecmp( psz_name, "RG_AUDIOPHILE" ) )
 598             {
 599                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 600
 601                 r->pb_gain[AUDIO_REPLAY_GAIN_ALBUM] = true;
 602                 r->pf_gain[AUDIO_REPLAY_GAIN_ALBUM] = atof( psz_value );
 603             }
 604             else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_PEAK" ) )
 605             {
 606                 audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
 607
 608                 r->pb_peak[AUDIO_REPLAY_GAIN_ALBUM] = true;
 609                 r->pf_peak[AUDIO_REPLAY_GAIN_ALBUM] = atof( psz_value );
 610             }
 611         }
 612         free( psz_comment );
 613         i++;
 614     }
 615 }
 616
 617 /*****************************************************************************
 618  * Interleave: helper function to interleave channels
 619  *****************************************************************************/
 620 static void ConfigureChannelOrder(int *pi_chan_table, int i_channels, uint32_t i_channel_mask, bool b_decode)
 621 {
 622     const uint32_t *pi_channels_in;
 623     switch( i_channels )
 624     {
 625         case 8:
 626             pi_channels_in = pi_8channels_in;
 627             break;
 628         case 7:
 629             pi_channels_in = pi_7channels_in;
 630             break;
 631         case 6:
 632         case 5:
 633             pi_channels_in = pi_6channels_in;
 634             break;
 635         case 4:
 636             pi_channels_in = pi_4channels_in;
 637             break;
 638         case 3:
 639             pi_channels_in = pi_3channels_in;
 640             break;
 641         default:
 642             {
 643                 int i;
 644                 for( i = 0; i< i_channels; ++i )
 645                 {
 646                     pi_chan_table[i] = i;
 647                 }
 648                 return;
 649             }
 650     }
 651
 652     if( b_decode )
 653         aout_CheckChannelReorder( pi_channels_in, NULL,
 654                                   i_channel_mask & AOUT_CHAN_PHYSMASK,
 655                                   i_channels,
 656                                   pi_chan_table );
 657     else
 658         aout_CheckChannelReorder( NULL, pi_channels_in,
 659                                   i_channel_mask & AOUT_CHAN_PHYSMASK,
 660                                   i_channels,
 661                                   pi_chan_table );
 662 }
 663
 664 /*****************************************************************************
 665  * Interleave: helper function to interleave channels
 666  *****************************************************************************/
 667 #ifdef MODULE_NAME_IS_tremor
 668 static void Interleave( int32_t *p_out, const int32_t **pp_in,
 669                         int i_nb_channels, int i_samples, int *pi_chan_table)
 670 {
 671     int i, j;
 672
 673     for ( j = 0; j < i_samples; j++ )
 674         for ( i = 0; i < i_nb_channels; i++ )
 675             p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j] * (FIXED32_ONE >> 24);
 676 }
 677 #else
 678 static void Interleave( float *p_out, const float **pp_in,
 679                         int i_nb_channels, int i_samples, int *pi_chan_table )
 680 {
 681     int i, j;
 682
 683     for ( j = 0; j < i_samples; j++ )
 684         for ( i = 0; i < i_nb_channels; i++ )
 685             p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j];
 686 }
 687 #endif
 688
 689 /*****************************************************************************
 690  * CloseDecoder: vorbis decoder destruction
 691  *****************************************************************************/
 692 static void CloseDecoder( vlc_object_t *p_this )
 693 {
 694     decoder_t *p_dec = (decoder_t *)p_this;
 695     decoder_sys_t *p_sys = p_dec->p_sys;
 696
 697     if( !p_sys->b_packetizer && p_sys->b_has_headers )
 698     {
 699         vorbis_block_clear( &p_sys->vb );
 700         vorbis_dsp_clear( &p_sys->vd );
 701     }
 702
 703     vorbis_comment_clear( &p_sys->vc );
 704     vorbis_info_clear( &p_sys->vi );  /* must be called last */
 705
 706     free( p_sys );
 707 }
 708
 709 #ifndef MODULE_NAME_IS_tremor
 710
 711 /*****************************************************************************
 712  * encoder_sys_t : vorbis encoder descriptor
 713  *****************************************************************************/
 714 struct encoder_sys_t
 715 {
 716     /*
 717      * Vorbis properties
 718      */
 719     vorbis_info      vi; /* struct that stores all the static vorbis bitstream
 720                             settings */
 721     vorbis_comment   vc; /* struct that stores all the bitstream user
 722                           * comments */
 723     vorbis_dsp_state vd; /* central working state for the packet->PCM
 724                           * decoder */
 725     vorbis_block     vb; /* local working space for packet->PCM decode */
 726
 727     int i_last_block_size;
 728     int i_samples_delay;
 729     int i_channels;
 730
 731     /*
 732     ** Channel reordering
 733     */
 734     int pi_chan_table[AOUT_CHAN_MAX];
 735
 736 };
 737
 738 /*****************************************************************************
 739  * OpenEncoder: probe the encoder and return score
 740  *****************************************************************************/
 741 static int OpenEncoder( vlc_object_t *p_this )
 742 {
 743     encoder_t *p_enc = (encoder_t *)p_this;
 744     encoder_sys_t *p_sys;
 745     int i_quality, i_min_bitrate, i_max_bitrate;
 746     ogg_packet header[3];
 747
 748     if( p_enc->fmt_out.i_codec != VLC_CODEC_VORBIS &&
 749         !p_enc->b_force )
 750     {
 751         return VLC_EGENERIC;
 752     }
 753
 754     /* Allocate the memory needed to store the decoder's structure */
 755     if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
 756         return VLC_ENOMEM;
 757     p_enc->p_sys = p_sys;
 758
 759     p_enc->pf_encode_audio = Encode;
 760     p_enc->fmt_in.i_codec = VLC_CODEC_FL32;
 761     p_enc->fmt_out.i_codec = VLC_CODEC_VORBIS;
 762
 763     config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
 764
 765     i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" );
 766     if( i_quality > 10 ) i_quality = 10;
 767     if( i_quality < 0 ) i_quality = 0;
 768
 769     if( var_GetBool( p_enc, ENC_CFG_PREFIX "cbr" ) ) i_quality = 0;
 770     i_max_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "max-bitrate" );
 771     i_min_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "min-bitrate" );
 772
 773     /* Initialize vorbis encoder */
 774     vorbis_info_init( &p_sys->vi );
 775
 776     if( i_quality > 0 )
 777     {
 778         /* VBR mode */
 779         if( vorbis_encode_setup_vbr( &p_sys->vi,
 780               p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
 781               i_quality * 0.1 ) )
 782         {
 783             vorbis_info_clear( &p_sys->vi );
 784             free( p_enc->p_sys );
 785             msg_Err( p_enc, "VBR mode initialisation failed" );
 786             return VLC_EGENERIC;
 787         }
 788
 789         /* Do we have optional hard quality restrictions? */
 790         if( i_max_bitrate > 0 || i_min_bitrate > 0 )
 791         {
 792             struct ovectl_ratemanage_arg ai;
 793             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai );
 794
 795             ai.bitrate_hard_min = i_min_bitrate;
 796             ai.bitrate_hard_max = i_max_bitrate;
 797             ai.management_active = 1;
 798
 799             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai );
 800
 801         }
 802         else
 803         {
 804             /* Turn off management entirely */
 805             vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL );
 806         }
 807     }
 808     else
 809     {
 810         if( vorbis_encode_setup_managed( &p_sys->vi,
 811               p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
 812               i_min_bitrate > 0 ? i_min_bitrate * 1000: -1,
 813               p_enc->fmt_out.i_bitrate,
 814               i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) )
 815           {
 816               vorbis_info_clear( &p_sys->vi );
 817               msg_Err( p_enc, "CBR mode initialisation failed" );
 818               free( p_enc->p_sys );
 819               return VLC_EGENERIC;
 820           }
 821     }
 822
 823     vorbis_encode_setup_init( &p_sys->vi );
 824
 825     /* Add a comment */
 826     vorbis_comment_init( &p_sys->vc);
 827     vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player");
 828
 829     /* Set up the analysis state and auxiliary encoding storage */
 830     vorbis_analysis_init( &p_sys->vd, &p_sys->vi );
 831     vorbis_block_init( &p_sys->vd, &p_sys->vb );
 832
 833     /* Create and store headers */
 834     vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc,
 835                                &header[0], &header[1], &header[2]);
 836     for( int i = 0; i < 3; i++ )
 837     {
 838         if( xiph_AppendHeaders( &p_enc->fmt_out.i_extra, &p_enc->fmt_out.p_extra,
 839                                 header[i].bytes, header[i].packet ) )
 840         {
 841             p_enc->fmt_out.i_extra = 0;
 842             p_enc->fmt_out.p_extra = NULL;
 843         }
 844     }
 845
 846     p_sys->i_channels = p_enc->fmt_in.audio.i_channels;
 847     p_sys->i_last_block_size = 0;
 848     p_sys->i_samples_delay = 0;
 849
 850     ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
 851             p_enc->fmt_in.audio.i_physical_channels, true);
 852
 853     return VLC_SUCCESS;
 854 }
 855
 856 /****************************************************************************
 857  * Encode: the whole thing
 858  ****************************************************************************
 859  * This function spits out ogg packets.
 860  ****************************************************************************/
 861 static block_t *Encode( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
 862 {
 863     encoder_sys_t *p_sys = p_enc->p_sys;
 864     ogg_packet oggpacket;
 865     block_t *p_block, *p_chain = NULL;
 866     float **buffer;
 867     int i;
 868     unsigned int j;
 869
 870     mtime_t i_pts = p_aout_buf->i_pts -
 871                 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
 872                 (mtime_t)p_enc->fmt_in.audio.i_rate;
 873
 874     p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
 875
 876     buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples );
 877
 878     /* convert samples to float and uninterleave */
 879     for( i = 0; i < p_sys->i_channels; i++ )
 880     {
 881         for( j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
 882         {
 883             buffer[i][j]= ((float *)p_aout_buf->p_buffer)
 884                                     [j * p_sys->i_channels + p_sys->pi_chan_table[i]];
 885         }
 886     }
 887
 888     vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples );
 889
 890     while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 )
 891     {
 892         int i_samples;
 893
 894         vorbis_analysis( &p_sys->vb, NULL );
 895         vorbis_bitrate_addblock( &p_sys->vb );
 896
 897         while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) )
 898         {
 899             int i_block_size;
 900             p_block = block_New( p_enc, oggpacket.bytes );
 901             memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
 902
 903             i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket );
 904
 905             if( i_block_size < 0 ) i_block_size = 0;
 906             i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
 907             p_sys->i_last_block_size = i_block_size;
 908
 909             p_block->i_length = (mtime_t)1000000 *
 910                 (mtime_t)i_samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
 911
 912             p_block->i_dts = p_block->i_pts = i_pts;
 913
 914             p_sys->i_samples_delay -= i_samples;
 915
 916             /* Update pts */
 917             i_pts += p_block->i_length;
 918             block_ChainAppend( &p_chain, p_block );
 919         }
 920     }
 921
 922     return p_chain;
 923 }
 924
 925 /*****************************************************************************
 926  * CloseEncoder: vorbis encoder destruction
 927  *****************************************************************************/
 928 static void CloseEncoder( vlc_object_t *p_this )
 929 {
 930     encoder_t *p_enc = (encoder_t *)p_this;
 931     encoder_sys_t *p_sys = p_enc->p_sys;
 932
 933     vorbis_block_clear( &p_sys->vb );
 934     vorbis_dsp_clear( &p_sys->vd );
 935     vorbis_comment_clear( &p_sys->vc );
 936     vorbis_info_clear( &p_sys->vi );  /* must be called last */
 937
 938     free( p_sys );
 939 }
 940
 941 #endif /* HAVE_VORBIS_VORBISENC_H && !MODULE_NAME_IS_tremor */