1 /*****************************************************************************
2 * vorbis.c: vorbis decoder/encoder/packetizer module making use of libvorbis.
3 *****************************************************************************
4 * Copyright (C) 2001-2003 the VideoLAN team
7 * Authors: Gildas Bazin <gbazin@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
28 #include <vlc/decoder.h>
29 #include <vlc/input.h>
34 #ifdef MODULE_NAME_IS_tremor
35 #include <tremor/ivorbiscodec.h>
38 #include <vorbis/codec.h>
41 #ifdef HAVE_VORBIS_VORBISENC_H
42 # include <vorbis/vorbisenc.h>
43 # ifndef OV_ECTL_RATEMANAGE_AVG
44 # define OV_ECTL_RATEMANAGE_AVG 0x0
50 /*****************************************************************************
51 * decoder_sys_t : vorbis decoder descriptor
52 *****************************************************************************/
56 vlc_bool_t b_packetizer;
66 vorbis_info vi; /* struct that stores all the static vorbis bitstream
68 vorbis_comment vc; /* struct that stores all the bitstream user
70 vorbis_dsp_state vd; /* central working state for the packet->PCM
72 vorbis_block vb; /* local working space for packet->PCM decode */
77 audio_date_t end_date;
78 int i_last_block_size;
83 int pi_chan_table[AOUT_CHAN_MAX];
86 static int pi_channels_maps[7] =
90 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
91 AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
92 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
93 | AOUT_CHAN_REARRIGHT,
94 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
95 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
96 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
97 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE
101 ** channel order as defined in http://www.ogghelp.com/ogg/glossary.cfm#Audio_Channels
104 /* recommended vorbis channel order for 6 channels */
105 static const uint32_t pi_6channels_in[] =
106 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
107 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,AOUT_CHAN_LFE,0 };
109 /* recommended vorbis channel order for 4 channels */
110 static const uint32_t pi_4channels_in[] =
111 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
113 /* recommended vorbis channel order for 3 channels */
114 static const uint32_t pi_3channels_in[] =
115 { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, 0 };
117 /* our internal channel order (WG-4 order) */
118 static const uint32_t pi_channels_out[] =
119 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
120 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
122 /****************************************************************************
124 ****************************************************************************/
125 static int OpenDecoder ( vlc_object_t * );
126 static int OpenPacketizer( vlc_object_t * );
127 static void CloseDecoder ( vlc_object_t * );
128 static void *DecodeBlock ( decoder_t *, block_t ** );
130 static int ProcessHeaders( decoder_t * );
131 static void *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
133 static aout_buffer_t *DecodePacket ( decoder_t *, ogg_packet * );
134 static block_t *SendPacket( decoder_t *, ogg_packet *, block_t * );
136 static void ParseVorbisComments( decoder_t * );
138 static void ConfigureChannelOrder(int *, int, uint32_t, vlc_bool_t );
140 #ifdef MODULE_NAME_IS_tremor
141 static void Interleave ( int32_t *, const int32_t **, int, int, int * );
143 static void Interleave ( float *, const float **, int, int, int * );
146 #ifndef MODULE_NAME_IS_tremor
147 static int OpenEncoder ( vlc_object_t * );
148 static void CloseEncoder ( vlc_object_t * );
149 static block_t *Encode ( encoder_t *, aout_buffer_t * );
152 /*****************************************************************************
154 *****************************************************************************/
155 #define ENC_QUALITY_TEXT N_("Encoding quality")
156 #define ENC_QUALITY_LONGTEXT N_( \
157 "Allows you to specify a quality between 1 (low) and 10 (high), instead " \
158 "of specifying a particular bitrate. This will produce a VBR stream." )
159 #define ENC_MAXBR_TEXT N_("Maximum encoding bitrate")
160 #define ENC_MAXBR_LONGTEXT N_( \
161 "Allows you to specify a maximum bitrate in kbps. " \
162 "Useful for streaming applications." )
163 #define ENC_MINBR_TEXT N_("Minimum encoding bitrate")
164 #define ENC_MINBR_LONGTEXT N_( \
165 "Allows you to specify a minimum bitrate in kbps. " \
166 "Useful for encoding for a fixed-size channel." )
167 #define ENC_CBR_TEXT N_("CBR encoding")
168 #define ENC_CBR_LONGTEXT N_( \
169 "Allows you to force a constant bitrate encoding (CBR)." )
172 set_shortname( "Vorbis" );
173 set_description( _("Vorbis audio decoder") );
174 #ifdef MODULE_NAME_IS_tremor
175 set_capability( "decoder", 90 );
177 set_capability( "decoder", 100 );
179 set_category( CAT_INPUT );
180 set_subcategory( SUBCAT_INPUT_ACODEC );
181 set_callbacks( OpenDecoder, CloseDecoder );
184 set_description( _("Vorbis audio packetizer") );
185 set_capability( "packetizer", 100 );
186 set_callbacks( OpenPacketizer, CloseDecoder );
188 #ifndef MODULE_NAME_IS_tremor
189 # define ENC_CFG_PREFIX "sout-vorbis-"
191 set_description( _("Vorbis audio encoder") );
192 set_capability( "encoder", 100 );
193 #if defined(HAVE_VORBIS_VORBISENC_H)
194 set_callbacks( OpenEncoder, CloseEncoder );
197 add_integer( ENC_CFG_PREFIX "quality", 0, NULL, ENC_QUALITY_TEXT,
198 ENC_QUALITY_LONGTEXT, VLC_FALSE );
199 add_integer( ENC_CFG_PREFIX "max-bitrate", 0, NULL, ENC_MAXBR_TEXT,
200 ENC_MAXBR_LONGTEXT, VLC_FALSE );
201 add_integer( ENC_CFG_PREFIX "min-bitrate", 0, NULL, ENC_MINBR_TEXT,
202 ENC_MINBR_LONGTEXT, VLC_FALSE );
203 add_bool( ENC_CFG_PREFIX "cbr", 0, NULL, ENC_CBR_TEXT,
204 ENC_CBR_LONGTEXT, VLC_FALSE );
209 #ifndef MODULE_NAME_IS_tremor
210 static const char *ppsz_enc_options[] = {
211 "quality", "max-bitrate", "min-bitrate", "cbr", NULL
215 /*****************************************************************************
216 * OpenDecoder: probe the decoder and return score
217 *****************************************************************************/
218 static int OpenDecoder( vlc_object_t *p_this )
220 decoder_t *p_dec = (decoder_t*)p_this;
221 decoder_sys_t *p_sys;
223 if( p_dec->fmt_in.i_codec != VLC_FOURCC('v','o','r','b') )
228 /* Allocate the memory needed to store the decoder's structure */
229 if( ( p_dec->p_sys = p_sys =
230 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
232 msg_Err( p_dec, "out of memory" );
237 aout_DateSet( &p_sys->end_date, 0 );
238 p_sys->i_last_block_size = 0;
239 p_sys->b_packetizer = VLC_FALSE;
240 p_sys->i_headers = 0;
242 /* Take care of vorbis init */
243 vorbis_info_init( &p_sys->vi );
244 vorbis_comment_init( &p_sys->vc );
246 /* Set output properties */
247 p_dec->fmt_out.i_cat = AUDIO_ES;
248 #ifdef MODULE_NAME_IS_tremor
249 p_dec->fmt_out.i_codec = VLC_FOURCC('f','i','3','2');
251 p_dec->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
255 p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
257 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
263 static int OpenPacketizer( vlc_object_t *p_this )
265 decoder_t *p_dec = (decoder_t*)p_this;
267 int i_ret = OpenDecoder( p_this );
269 if( i_ret == VLC_SUCCESS )
271 p_dec->p_sys->b_packetizer = VLC_TRUE;
272 p_dec->fmt_out.i_codec = VLC_FOURCC('v','o','r','b');
278 /****************************************************************************
279 * DecodeBlock: the whole thing
280 ****************************************************************************
281 * This function must be fed with ogg packets.
282 ****************************************************************************/
283 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
285 decoder_sys_t *p_sys = p_dec->p_sys;
286 ogg_packet oggpacket;
288 if( !pp_block ) return NULL;
292 /* Block to Ogg packet */
293 oggpacket.packet = (*pp_block)->p_buffer;
294 oggpacket.bytes = (*pp_block)->i_buffer;
298 if( p_sys->b_packetizer ) return NULL;
300 /* Block to Ogg packet */
301 oggpacket.packet = NULL;
305 oggpacket.granulepos = -1;
308 oggpacket.packetno = 0;
310 /* Check for headers */
311 if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
313 /* Headers already available as extra data */
314 msg_Dbg( p_dec, "Headers already available as extra data" );
315 p_sys->i_headers = 3;
317 else if( oggpacket.bytes && p_sys->i_headers < 3 )
319 /* Backup headers as extra data */
322 p_dec->fmt_in.p_extra =
323 realloc( p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra +
324 oggpacket.bytes + 2 );
325 p_extra = (uint8_t *)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra;
326 *(p_extra++) = oggpacket.bytes >> 8;
327 *(p_extra++) = oggpacket.bytes & 0xFF;
329 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
330 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
332 block_Release( *pp_block );
337 if( p_sys->i_headers == 3 )
339 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
341 p_sys->i_headers = 0;
342 p_dec->fmt_in.i_extra = 0;
343 block_Release( *pp_block );
346 else p_sys->i_headers++;
349 return ProcessPacket( p_dec, &oggpacket, pp_block );
352 /*****************************************************************************
353 * ProcessHeaders: process Vorbis headers.
354 *****************************************************************************/
355 static int ProcessHeaders( decoder_t *p_dec )
357 decoder_sys_t *p_sys = p_dec->p_sys;
358 ogg_packet oggpacket;
362 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
364 oggpacket.granulepos = -1;
365 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
367 oggpacket.packetno = 0;
368 p_extra = p_dec->fmt_in.p_extra;
369 i_extra = p_dec->fmt_in.i_extra;
371 /* Take care of the initial Vorbis header */
372 oggpacket.bytes = *(p_extra++) << 8;
373 oggpacket.bytes |= (*(p_extra++) & 0xFF);
374 oggpacket.packet = p_extra;
375 p_extra += oggpacket.bytes;
376 i_extra -= (oggpacket.bytes + 2);
379 msg_Err( p_dec, "header data corrupted");
383 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
385 msg_Err( p_dec, "this bitstream does not contain Vorbis audio data");
389 /* Setup the format */
390 p_dec->fmt_out.audio.i_rate = p_sys->vi.rate;
391 p_dec->fmt_out.audio.i_channels = p_sys->vi.channels;
392 p_dec->fmt_out.audio.i_physical_channels =
393 p_dec->fmt_out.audio.i_original_channels =
394 pi_channels_maps[p_sys->vi.channels];
395 p_dec->fmt_out.i_bitrate = p_sys->vi.bitrate_nominal;
397 aout_DateInit( &p_sys->end_date, p_sys->vi.rate );
398 aout_DateSet( &p_sys->end_date, 0 );
400 msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ld",
401 p_sys->vi.channels, p_sys->vi.rate, p_sys->vi.bitrate_nominal );
403 /* The next packet in order is the comments header */
405 oggpacket.bytes = *(p_extra++) << 8;
406 oggpacket.bytes |= (*(p_extra++) & 0xFF);
407 oggpacket.packet = p_extra;
408 p_extra += oggpacket.bytes;
409 i_extra -= (oggpacket.bytes + 2);
412 msg_Err( p_dec, "header data corrupted");
416 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
418 msg_Err( p_dec, "2nd Vorbis header is corrupted" );
421 ParseVorbisComments( p_dec );
423 /* The next packet in order is the codebooks header
424 * We need to watch out that this packet is not missing as a
425 * missing or corrupted header is fatal. */
426 oggpacket.bytes = *(p_extra++) << 8;
427 oggpacket.bytes |= (*(p_extra++) & 0xFF);
428 oggpacket.packet = p_extra;
429 i_extra -= (oggpacket.bytes + 2);
432 msg_Err( p_dec, "header data corrupted");
436 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
438 msg_Err( p_dec, "3rd Vorbis header is corrupted" );
442 if( !p_sys->b_packetizer )
444 /* Initialize the Vorbis packet->PCM decoder */
445 vorbis_synthesis_init( &p_sys->vd, &p_sys->vi );
446 vorbis_block_init( &p_sys->vd, &p_sys->vb );
450 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
451 p_dec->fmt_out.p_extra =
452 realloc( p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
453 memcpy( p_dec->fmt_out.p_extra,
454 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
457 ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
458 p_dec->fmt_out.audio.i_physical_channels, VLC_TRUE);
463 /*****************************************************************************
464 * ProcessPacket: processes a Vorbis packet.
465 *****************************************************************************/
466 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
469 decoder_sys_t *p_sys = p_dec->p_sys;
470 block_t *p_block = *pp_block;
472 /* Date management */
473 if( p_block && p_block->i_pts > 0 &&
474 p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
476 aout_DateSet( &p_sys->end_date, p_block->i_pts );
479 if( !aout_DateGet( &p_sys->end_date ) )
481 /* We've just started the stream, wait for the first PTS. */
482 if( p_block ) block_Release( p_block );
486 *pp_block = NULL; /* To avoid being fed the same packet again */
488 if( p_sys->b_packetizer )
490 return SendPacket( p_dec, p_oggpacket, p_block );
494 aout_buffer_t *p_aout_buffer;
496 if( p_sys->i_headers >= 3 )
497 p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
499 p_aout_buffer = NULL;
501 if( p_block ) block_Release( p_block );
502 return p_aout_buffer;
506 /*****************************************************************************
507 * DecodePacket: decodes a Vorbis packet.
508 *****************************************************************************/
509 static aout_buffer_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
511 decoder_sys_t *p_sys = p_dec->p_sys;
514 #ifdef MODULE_NAME_IS_tremor
520 if( p_oggpacket->bytes &&
521 #ifdef MODULE_NAME_IS_tremor
522 vorbis_synthesis( &p_sys->vb, p_oggpacket, 1 ) == 0 )
524 vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 )
526 vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb );
528 /* **pp_pcm is a multichannel float vector. In stereo, for
529 * example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is
530 * the size of each channel. Convert the float values
531 * (-1.<=range<=1.) to whatever PCM format and write it out */
533 if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 )
536 aout_buffer_t *p_aout_buffer;
539 p_dec->pf_aout_buffer_new( p_dec, i_samples );
541 if( p_aout_buffer == NULL ) return NULL;
543 /* Interleave the samples */
544 #ifdef MODULE_NAME_IS_tremor
545 Interleave( (int32_t *)p_aout_buffer->p_buffer,
546 (const int32_t **)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table);
548 Interleave( (float *)p_aout_buffer->p_buffer,
549 (const float **)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table);
552 /* Tell libvorbis how many samples we actually consumed */
553 vorbis_synthesis_read( &p_sys->vd, i_samples );
555 /* Date management */
556 p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
557 p_aout_buffer->end_date = aout_DateIncrement( &p_sys->end_date,
559 return p_aout_buffer;
567 /*****************************************************************************
568 * SendPacket: send an ogg dated packet to the stream output.
569 *****************************************************************************/
570 static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
573 decoder_sys_t *p_sys = p_dec->p_sys;
574 int i_block_size, i_samples;
576 i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket );
577 if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */
578 i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
579 p_sys->i_last_block_size = i_block_size;
581 /* Date management */
582 p_block->i_dts = p_block->i_pts = aout_DateGet( &p_sys->end_date );
584 if( p_sys->i_headers >= 3 )
585 p_block->i_length = aout_DateIncrement( &p_sys->end_date, i_samples ) -
588 p_block->i_length = 0;
593 /*****************************************************************************
594 * ParseVorbisComments: FIXME should be done in demuxer
595 *****************************************************************************/
596 static void ParseVorbisComments( decoder_t *p_dec )
598 input_thread_t *p_input = (input_thread_t *)p_dec->p_parent;
599 char *psz_name, *psz_value, *psz_comment;
602 if( p_input->i_object_type != VLC_OBJECT_INPUT ) return;
604 while( i < p_dec->p_sys->vc.comments )
606 psz_comment = strdup( p_dec->p_sys->vc.user_comments[i] );
609 msg_Warn( p_dec, "out of memory" );
612 psz_name = psz_comment;
613 psz_value = strchr( psz_comment, '=' );
618 input_Control( p_input, INPUT_ADD_INFO, _("Vorbis comment"),
619 psz_name, psz_value );
620 /* HACK, we should use meta */
621 if( strcasestr( psz_name, "artist" ) )
623 input_Control( p_input, INPUT_ADD_INFO, _("Meta-information"),
624 _("Artist"), psz_value );
626 else if( strcasestr( psz_name, "title" ) )
628 p_input->input.p_item->psz_name = strdup( psz_value );
632 var_SetInteger( p_input, "item-change", p_input->input.p_item->i_id );
638 /*****************************************************************************
639 * Interleave: helper function to interleave channels
640 *****************************************************************************/
641 static void ConfigureChannelOrder(int *pi_chan_table, int i_channels, uint32_t i_channel_mask, vlc_bool_t b_decode)
643 const uint32_t *pi_channels_in;
648 pi_channels_in = pi_6channels_in;
651 pi_channels_in = pi_4channels_in;
654 pi_channels_in = pi_3channels_in;
659 for( i = 0; i< i_channels; ++i )
661 pi_chan_table[i] = i;
668 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
669 i_channel_mask & AOUT_CHAN_PHYSMASK,
673 aout_CheckChannelReorder( pi_channels_out, pi_channels_in,
674 i_channel_mask & AOUT_CHAN_PHYSMASK,
679 /*****************************************************************************
680 * Interleave: helper function to interleave channels
681 *****************************************************************************/
682 #ifdef MODULE_NAME_IS_tremor
683 static void Interleave( int32_t *p_out, const int32_t **pp_in,
684 int i_nb_channels, int i_samples, int *pi_chan_table)
688 for ( j = 0; j < i_samples; j++ )
689 for ( i = 0; i < i_nb_channels; i++ )
690 p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j] * (FIXED32_ONE >> 24);
693 static void Interleave( float *p_out, const float **pp_in,
694 int i_nb_channels, int i_samples, int *pi_chan_table )
698 for ( j = 0; j < i_samples; j++ )
699 for ( i = 0; i < i_nb_channels; i++ )
700 p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j];
704 /*****************************************************************************
705 * CloseDecoder: vorbis decoder destruction
706 *****************************************************************************/
707 static void CloseDecoder( vlc_object_t *p_this )
709 decoder_t *p_dec = (decoder_t *)p_this;
710 decoder_sys_t *p_sys = p_dec->p_sys;
712 if( !p_sys->b_packetizer && p_sys->i_headers > 3 )
714 vorbis_block_clear( &p_sys->vb );
715 vorbis_dsp_clear( &p_sys->vd );
718 vorbis_comment_clear( &p_sys->vc );
719 vorbis_info_clear( &p_sys->vi ); /* must be called last */
724 #if defined(HAVE_VORBIS_VORBISENC_H) && !defined(MODULE_NAME_IS_tremor)
726 /*****************************************************************************
727 * encoder_sys_t : vorbis encoder descriptor
728 *****************************************************************************/
734 vorbis_info vi; /* struct that stores all the static vorbis bitstream
736 vorbis_comment vc; /* struct that stores all the bitstream user
738 vorbis_dsp_state vd; /* central working state for the packet->PCM
740 vorbis_block vb; /* local working space for packet->PCM decode */
742 int i_last_block_size;
752 ** Channel reordering
754 int pi_chan_table[AOUT_CHAN_MAX];
758 /*****************************************************************************
759 * OpenEncoder: probe the encoder and return score
760 *****************************************************************************/
761 static int OpenEncoder( vlc_object_t *p_this )
763 encoder_t *p_enc = (encoder_t *)p_this;
764 encoder_sys_t *p_sys;
765 int i_quality, i_min_bitrate, i_max_bitrate, i;
766 ogg_packet header[3];
770 if( p_enc->fmt_out.i_codec != VLC_FOURCC('v','o','r','b') &&
776 /* Allocate the memory needed to store the decoder's structure */
777 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
779 msg_Err( p_enc, "out of memory" );
782 p_enc->p_sys = p_sys;
784 p_enc->pf_encode_audio = Encode;
785 p_enc->fmt_in.i_codec = VLC_FOURCC('f','l','3','2');
786 p_enc->fmt_out.i_codec = VLC_FOURCC('v','o','r','b');
788 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
790 var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
791 i_quality = val.i_int;
792 if( i_quality > 10 ) i_quality = 10;
793 if( i_quality < 0 ) i_quality = 0;
794 var_Get( p_enc, ENC_CFG_PREFIX "cbr", &val );
795 if( val.b_bool ) i_quality = 0;
796 var_Get( p_enc, ENC_CFG_PREFIX "max-bitrate", &val );
797 i_max_bitrate = val.i_int;
798 var_Get( p_enc, ENC_CFG_PREFIX "min-bitrate", &val );
799 i_min_bitrate = val.i_int;
801 /* Initialize vorbis encoder */
802 vorbis_info_init( &p_sys->vi );
807 if( vorbis_encode_setup_vbr( &p_sys->vi,
808 p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
811 vorbis_info_clear( &p_sys->vi );
812 free( p_enc->p_sys );
813 msg_Err( p_enc, "VBR mode initialisation failed" );
817 /* Do we have optional hard quality restrictions? */
818 if( i_max_bitrate > 0 || i_min_bitrate > 0 )
820 struct ovectl_ratemanage_arg ai;
821 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai );
823 ai.bitrate_hard_min = i_min_bitrate;
824 ai.bitrate_hard_max = i_max_bitrate;
825 ai.management_active = 1;
827 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai );
832 /* Turn off management entirely */
833 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL );
838 if( vorbis_encode_setup_managed( &p_sys->vi,
839 p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
840 i_min_bitrate > 0 ? i_min_bitrate * 1000: -1,
841 p_enc->fmt_out.i_bitrate,
842 i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) )
844 vorbis_info_clear( &p_sys->vi );
845 msg_Err( p_enc, "CBR mode initialisation failed" );
846 free( p_enc->p_sys );
851 vorbis_encode_setup_init( &p_sys->vi );
854 vorbis_comment_init( &p_sys->vc);
855 vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player");
857 /* Set up the analysis state and auxiliary encoding storage */
858 vorbis_analysis_init( &p_sys->vd, &p_sys->vi );
859 vorbis_block_init( &p_sys->vd, &p_sys->vb );
861 /* Create and store headers */
862 vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc,
863 &header[0], &header[1], &header[2]);
864 p_enc->fmt_out.i_extra = 3 * 2 + header[0].bytes +
865 header[1].bytes + header[2].bytes;
866 p_extra = p_enc->fmt_out.p_extra = malloc( p_enc->fmt_out.i_extra );
867 for( i = 0; i < 3; i++ )
869 *(p_extra++) = header[i].bytes >> 8;
870 *(p_extra++) = header[i].bytes & 0xFF;
871 memcpy( p_extra, header[i].packet, header[i].bytes );
872 p_extra += header[i].bytes;
875 p_sys->i_channels = p_enc->fmt_in.audio.i_channels;
876 p_sys->i_last_block_size = 0;
877 p_sys->i_samples_delay = 0;
880 ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
881 p_enc->fmt_in.audio.i_physical_channels, VLC_TRUE);
886 /****************************************************************************
887 * Encode: the whole thing
888 ****************************************************************************
889 * This function spits out ogg packets.
890 ****************************************************************************/
891 static block_t *Encode( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
893 encoder_sys_t *p_sys = p_enc->p_sys;
894 ogg_packet oggpacket;
895 block_t *p_block, *p_chain = NULL;
900 p_sys->i_pts = p_aout_buf->start_date -
901 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
902 (mtime_t)p_enc->fmt_in.audio.i_rate;
904 p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
906 buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples );
908 /* convert samples to float and uninterleave */
909 for( i = 0; i < p_sys->i_channels; i++ )
911 for( j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
913 buffer[i][j]= ((float *)p_aout_buf->p_buffer)
914 [j * p_sys->i_channels + p_sys->pi_chan_table[i]];
918 vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples );
920 while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 )
924 vorbis_analysis( &p_sys->vb, NULL );
925 vorbis_bitrate_addblock( &p_sys->vb );
927 while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) )
930 p_block = block_New( p_enc, oggpacket.bytes );
931 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
933 i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket );
935 if( i_block_size < 0 ) i_block_size = 0;
936 i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
937 p_sys->i_last_block_size = i_block_size;
939 p_block->i_length = (mtime_t)1000000 *
940 (mtime_t)i_samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
942 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
944 p_sys->i_samples_delay -= i_samples;
947 p_sys->i_pts += p_block->i_length;
948 block_ChainAppend( &p_chain, p_block );
955 /*****************************************************************************
956 * CloseEncoder: vorbis encoder destruction
957 *****************************************************************************/
958 static void CloseEncoder( vlc_object_t *p_this )
960 encoder_t *p_enc = (encoder_t *)p_this;
961 encoder_sys_t *p_sys = p_enc->p_sys;
963 vorbis_block_clear( &p_sys->vb );
964 vorbis_dsp_clear( &p_sys->vd );
965 vorbis_comment_clear( &p_sys->vc );
966 vorbis_info_clear( &p_sys->vi ); /* must be called last */
971 #endif /* HAVE_VORBIS_VORBISENC_H && !MODULE_NAME_IS_tremor */