1 /*****************************************************************************
2 * vorbis.c: vorbis decoder/encoder/packetizer module making use of libvorbis.
3 *****************************************************************************
4 * Copyright (C) 2001-2003 VideoLAN
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;
82 static int pi_channels_maps[7] =
86 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
87 AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
88 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
89 | AOUT_CHAN_REARRIGHT,
90 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
91 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
92 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
93 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE
96 /****************************************************************************
98 ****************************************************************************/
99 static int OpenDecoder ( vlc_object_t * );
100 static int OpenPacketizer( vlc_object_t * );
101 static void CloseDecoder ( vlc_object_t * );
102 static void *DecodeBlock ( decoder_t *, block_t ** );
104 static int ProcessHeaders( decoder_t * );
105 static void *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
107 static aout_buffer_t *DecodePacket ( decoder_t *, ogg_packet * );
108 static block_t *SendPacket( decoder_t *, ogg_packet *, block_t * );
110 static void ParseVorbisComments( decoder_t * );
112 #ifdef MODULE_NAME_IS_tremor
113 static void Interleave ( int32_t *, const int32_t **, int, int );
115 static void Interleave ( float *, const float **, int, int );
118 #ifndef MODULE_NAME_IS_tremor
119 static int OpenEncoder ( vlc_object_t * );
120 static void CloseEncoder ( vlc_object_t * );
121 static block_t *Encode ( encoder_t *, aout_buffer_t * );
124 /*****************************************************************************
126 *****************************************************************************/
127 #define ENC_QUALITY_TEXT N_("Encoding quality")
128 #define ENC_QUALITY_LONGTEXT N_( \
129 "Allows you to specify a quality between 1 (low) and 10 (high), instead " \
130 "of specifying a particular bitrate. This will produce a VBR stream." )
131 #define ENC_MAXBR_TEXT N_("Maximum encoding bitrate")
132 #define ENC_MAXBR_LONGTEXT N_( \
133 "Allows you to specify a maximum bitrate in kbps. " \
134 "Useful for streaming applications." )
135 #define ENC_MINBR_TEXT N_("Minimum encoding bitrate")
136 #define ENC_MINBR_LONGTEXT N_( \
137 "Allows you to specify a minimum bitrate in kbps. " \
138 "Useful for encoding for a fixed-size channel." )
139 #define ENC_CBR_TEXT N_("CBR encoding")
140 #define ENC_CBR_LONGTEXT N_( \
141 "Allows you to force a constant bitrate encoding (CBR)." )
144 set_shortname( _("Vorbis"));
145 set_description( _("Vorbis audio decoder") );
146 #ifdef MODULE_NAME_IS_tremor
147 set_capability( "decoder", 90 );
149 set_capability( "decoder", 100 );
151 set_category( CAT_INPUT );
152 set_subcategory( SUBCAT_INPUT_ACODEC );
153 set_callbacks( OpenDecoder, CloseDecoder );
156 set_description( _("Vorbis audio packetizer") );
157 set_capability( "packetizer", 100 );
158 set_callbacks( OpenPacketizer, CloseDecoder );
160 #ifndef MODULE_NAME_IS_tremor
161 # define ENC_CFG_PREFIX "sout-vorbis-"
163 set_description( _("Vorbis audio encoder") );
164 set_capability( "encoder", 100 );
165 #if defined(HAVE_VORBIS_VORBISENC_H)
166 set_callbacks( OpenEncoder, CloseEncoder );
169 add_integer( ENC_CFG_PREFIX "quality", 3, NULL, ENC_QUALITY_TEXT,
170 ENC_QUALITY_LONGTEXT, VLC_FALSE );
171 add_integer( ENC_CFG_PREFIX "max-bitrate", 0, NULL, ENC_MAXBR_TEXT,
172 ENC_MAXBR_LONGTEXT, VLC_FALSE );
173 add_integer( ENC_CFG_PREFIX "min-bitrate", 0, NULL, ENC_MINBR_TEXT,
174 ENC_MINBR_LONGTEXT, VLC_FALSE );
175 add_bool( ENC_CFG_PREFIX "cbr", 0, NULL, ENC_CBR_TEXT,
176 ENC_CBR_LONGTEXT, VLC_FALSE );
181 #ifndef MODULE_NAME_IS_tremor
182 static const char *ppsz_enc_options[] = {
183 "quality", "max-bitrate", "min-bitrate", "cbr", NULL
187 /*****************************************************************************
188 * OpenDecoder: probe the decoder and return score
189 *****************************************************************************/
190 static int OpenDecoder( vlc_object_t *p_this )
192 decoder_t *p_dec = (decoder_t*)p_this;
193 decoder_sys_t *p_sys;
195 if( p_dec->fmt_in.i_codec != VLC_FOURCC('v','o','r','b') )
200 /* Allocate the memory needed to store the decoder's structure */
201 if( ( p_dec->p_sys = p_sys =
202 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
204 msg_Err( p_dec, "out of memory" );
209 aout_DateSet( &p_sys->end_date, 0 );
210 p_sys->i_last_block_size = 0;
211 p_sys->b_packetizer = VLC_FALSE;
212 p_sys->i_headers = 0;
214 /* Take care of vorbis init */
215 vorbis_info_init( &p_sys->vi );
216 vorbis_comment_init( &p_sys->vc );
218 /* Set output properties */
219 p_dec->fmt_out.i_cat = AUDIO_ES;
220 #ifdef MODULE_NAME_IS_tremor
221 p_dec->fmt_out.i_codec = VLC_FOURCC('f','i','3','2');
223 p_dec->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
227 p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
229 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
235 static int OpenPacketizer( vlc_object_t *p_this )
237 decoder_t *p_dec = (decoder_t*)p_this;
239 int i_ret = OpenDecoder( p_this );
241 if( i_ret == VLC_SUCCESS )
243 p_dec->p_sys->b_packetizer = VLC_TRUE;
244 p_dec->fmt_out.i_codec = VLC_FOURCC('v','o','r','b');
250 /****************************************************************************
251 * DecodeBlock: the whole thing
252 ****************************************************************************
253 * This function must be fed with ogg packets.
254 ****************************************************************************/
255 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
257 decoder_sys_t *p_sys = p_dec->p_sys;
258 ogg_packet oggpacket;
260 if( !pp_block ) return NULL;
264 /* Block to Ogg packet */
265 oggpacket.packet = (*pp_block)->p_buffer;
266 oggpacket.bytes = (*pp_block)->i_buffer;
270 if( p_sys->b_packetizer ) return NULL;
272 /* Block to Ogg packet */
273 oggpacket.packet = NULL;
277 oggpacket.granulepos = -1;
280 oggpacket.packetno = 0;
282 /* Check for headers */
283 if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
285 /* Headers already available as extra data */
286 p_sys->i_headers = 3;
288 else if( oggpacket.bytes && p_sys->i_headers < 3 )
290 /* Backup headers as extra data */
293 p_dec->fmt_in.p_extra =
294 realloc( p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra +
295 oggpacket.bytes + 2 );
296 p_extra = (uint8_t *)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra;
297 *(p_extra++) = oggpacket.bytes >> 8;
298 *(p_extra++) = oggpacket.bytes & 0xFF;
300 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
301 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
303 block_Release( *pp_block );
308 if( p_sys->i_headers == 3 )
310 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
312 p_sys->i_headers = 0;
313 p_dec->fmt_in.i_extra = 0;
314 block_Release( *pp_block );
317 else p_sys->i_headers++;
320 return ProcessPacket( p_dec, &oggpacket, pp_block );
323 /*****************************************************************************
324 * ProcessHeaders: process Vorbis headers.
325 *****************************************************************************/
326 static int ProcessHeaders( decoder_t *p_dec )
328 decoder_sys_t *p_sys = p_dec->p_sys;
329 ogg_packet oggpacket;
333 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
335 oggpacket.granulepos = -1;
336 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
338 oggpacket.packetno = 0;
339 p_extra = p_dec->fmt_in.p_extra;
340 i_extra = p_dec->fmt_in.i_extra;
342 /* Take care of the initial Vorbis header */
343 oggpacket.bytes = *(p_extra++) << 8;
344 oggpacket.bytes |= (*(p_extra++) & 0xFF);
345 oggpacket.packet = p_extra;
346 p_extra += oggpacket.bytes;
347 i_extra -= (oggpacket.bytes + 2);
350 msg_Err( p_dec, "header data corrupted");
354 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
356 msg_Err( p_dec, "this bitstream does not contain Vorbis audio data");
360 /* Setup the format */
361 p_dec->fmt_out.audio.i_rate = p_sys->vi.rate;
362 p_dec->fmt_out.audio.i_channels = p_sys->vi.channels;
363 p_dec->fmt_out.audio.i_physical_channels =
364 p_dec->fmt_out.audio.i_original_channels =
365 pi_channels_maps[p_sys->vi.channels];
366 p_dec->fmt_out.i_bitrate = p_sys->vi.bitrate_nominal;
368 aout_DateInit( &p_sys->end_date, p_sys->vi.rate );
369 aout_DateSet( &p_sys->end_date, 0 );
371 msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ld",
372 p_sys->vi.channels, p_sys->vi.rate, p_sys->vi.bitrate_nominal );
374 /* The next packet in order is the comments header */
376 oggpacket.bytes = *(p_extra++) << 8;
377 oggpacket.bytes |= (*(p_extra++) & 0xFF);
378 oggpacket.packet = p_extra;
379 p_extra += oggpacket.bytes;
380 i_extra -= (oggpacket.bytes + 2);
383 msg_Err( p_dec, "header data corrupted");
387 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
389 msg_Err( p_dec, "2nd Vorbis header is corrupted" );
392 ParseVorbisComments( p_dec );
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.bytes = *(p_extra++) << 8;
398 oggpacket.bytes |= (*(p_extra++) & 0xFF);
399 oggpacket.packet = p_extra;
400 i_extra -= (oggpacket.bytes + 2);
403 msg_Err( p_dec, "header data corrupted");
407 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
409 msg_Err( p_dec, "3rd Vorbis header is corrupted" );
413 if( !p_sys->b_packetizer )
415 /* Initialize the Vorbis packet->PCM decoder */
416 vorbis_synthesis_init( &p_sys->vd, &p_sys->vi );
417 vorbis_block_init( &p_sys->vd, &p_sys->vb );
421 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
422 p_dec->fmt_out.p_extra =
423 realloc( p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
424 memcpy( p_dec->fmt_out.p_extra,
425 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
431 /*****************************************************************************
432 * ProcessPacket: processes a Vorbis packet.
433 *****************************************************************************/
434 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
437 decoder_sys_t *p_sys = p_dec->p_sys;
438 block_t *p_block = *pp_block;
440 /* Date management */
441 if( p_block && p_block->i_pts > 0 &&
442 p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
444 aout_DateSet( &p_sys->end_date, p_block->i_pts );
447 if( !aout_DateGet( &p_sys->end_date ) )
449 /* We've just started the stream, wait for the first PTS. */
450 if( p_block ) block_Release( p_block );
454 *pp_block = NULL; /* To avoid being fed the same packet again */
456 if( p_sys->b_packetizer )
458 return SendPacket( p_dec, p_oggpacket, p_block );
462 aout_buffer_t *p_aout_buffer;
464 if( p_sys->i_headers >= 3 )
465 p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
467 p_aout_buffer = NULL;
469 if( p_block ) block_Release( p_block );
470 return p_aout_buffer;
474 /*****************************************************************************
475 * DecodePacket: decodes a Vorbis packet.
476 *****************************************************************************/
477 static aout_buffer_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
479 decoder_sys_t *p_sys = p_dec->p_sys;
482 #ifdef MODULE_NAME_IS_tremor
488 if( p_oggpacket->bytes &&
489 #ifdef MODULE_NAME_IS_tremor
490 vorbis_synthesis( &p_sys->vb, p_oggpacket, 1 ) == 0 )
492 vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 )
494 vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb );
496 /* **pp_pcm is a multichannel float vector. In stereo, for
497 * example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is
498 * the size of each channel. Convert the float values
499 * (-1.<=range<=1.) to whatever PCM format and write it out */
501 if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 )
504 aout_buffer_t *p_aout_buffer;
507 p_dec->pf_aout_buffer_new( p_dec, i_samples );
509 if( p_aout_buffer == NULL ) return NULL;
511 /* Interleave the samples */
512 #ifdef MODULE_NAME_IS_tremor
513 Interleave( (int32_t *)p_aout_buffer->p_buffer,
514 (const int32_t **)pp_pcm, p_sys->vi.channels, i_samples );
516 Interleave( (float *)p_aout_buffer->p_buffer,
517 (const float **)pp_pcm, p_sys->vi.channels, i_samples );
520 /* Tell libvorbis how many samples we actually consumed */
521 vorbis_synthesis_read( &p_sys->vd, i_samples );
523 /* Date management */
524 p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
525 p_aout_buffer->end_date = aout_DateIncrement( &p_sys->end_date,
527 return p_aout_buffer;
535 /*****************************************************************************
536 * SendPacket: send an ogg dated packet to the stream output.
537 *****************************************************************************/
538 static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
541 decoder_sys_t *p_sys = p_dec->p_sys;
542 int i_block_size, i_samples;
544 i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket );
545 if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */
546 i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
547 p_sys->i_last_block_size = i_block_size;
549 /* Date management */
550 p_block->i_dts = p_block->i_pts = aout_DateGet( &p_sys->end_date );
552 if( p_sys->i_headers >= 3 )
553 p_block->i_length = aout_DateIncrement( &p_sys->end_date, i_samples ) -
556 p_block->i_length = 0;
561 /*****************************************************************************
562 * ParseVorbisComments: FIXME should be done in demuxer
563 *****************************************************************************/
564 static void ParseVorbisComments( decoder_t *p_dec )
566 input_thread_t *p_input = (input_thread_t *)p_dec->p_parent;
567 char *psz_name, *psz_value, *psz_comment;
570 if( p_input->i_object_type != VLC_OBJECT_INPUT ) return;
572 while( i < p_dec->p_sys->vc.comments )
574 psz_comment = strdup( p_dec->p_sys->vc.user_comments[i] );
577 msg_Warn( p_dec, "out of memory" );
580 psz_name = psz_comment;
581 psz_value = strchr( psz_comment, '=' );
586 input_Control( p_input, INPUT_ADD_INFO, _("Vorbis comment"),
587 psz_name, psz_value );
588 /* HACK, we should use meta */
589 if( strstr( psz_name, "artist" ) )
591 input_Control( p_input, INPUT_ADD_INFO, _("Meta-information"),
592 _("Artist"), psz_value );
594 else if( strstr( psz_name, "title" ) )
596 p_input->input.p_item->psz_name = strdup( psz_value );
600 var_SetInteger( p_input, "item-change", p_input->input.p_item->i_id );
606 /*****************************************************************************
607 * Interleave: helper function to interleave channels
608 *****************************************************************************/
609 #ifdef MODULE_NAME_IS_tremor
610 static void Interleave( int32_t *p_out, const int32_t **pp_in,
611 int i_nb_channels, int i_samples )
615 for ( j = 0; j < i_samples; j++ )
616 for ( i = 0; i < i_nb_channels; i++ )
617 p_out[j * i_nb_channels + i] = pp_in[i][j] * (FIXED32_ONE >> 24);
620 static void Interleave( float *p_out, const float **pp_in,
621 int i_nb_channels, int i_samples )
625 for ( j = 0; j < i_samples; j++ )
626 for ( i = 0; i < i_nb_channels; i++ )
627 p_out[j * i_nb_channels + i] = pp_in[i][j];
631 /*****************************************************************************
632 * CloseDecoder: vorbis decoder destruction
633 *****************************************************************************/
634 static void CloseDecoder( vlc_object_t *p_this )
636 decoder_t *p_dec = (decoder_t *)p_this;
637 decoder_sys_t *p_sys = p_dec->p_sys;
639 if( !p_sys->b_packetizer && p_sys->i_headers >= 3 )
641 vorbis_block_clear( &p_sys->vb );
642 vorbis_dsp_clear( &p_sys->vd );
645 vorbis_comment_clear( &p_sys->vc );
646 vorbis_info_clear( &p_sys->vi ); /* must be called last */
651 #if defined(HAVE_VORBIS_VORBISENC_H) && !defined(MODULE_NAME_IS_tremor)
653 /*****************************************************************************
654 * encoder_sys_t : vorbis encoder descriptor
655 *****************************************************************************/
661 vorbis_info vi; /* struct that stores all the static vorbis bitstream
663 vorbis_comment vc; /* struct that stores all the bitstream user
665 vorbis_dsp_state vd; /* central working state for the packet->PCM
667 vorbis_block vb; /* local working space for packet->PCM decode */
669 int i_last_block_size;
679 /*****************************************************************************
680 * OpenEncoder: probe the encoder and return score
681 *****************************************************************************/
682 static int OpenEncoder( vlc_object_t *p_this )
684 encoder_t *p_enc = (encoder_t *)p_this;
685 encoder_sys_t *p_sys;
686 int i_quality, i_min_bitrate, i_max_bitrate, i;
687 ogg_packet header[3];
691 if( p_enc->fmt_out.i_codec != VLC_FOURCC('v','o','r','b') &&
697 /* Allocate the memory needed to store the decoder's structure */
698 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
700 msg_Err( p_enc, "out of memory" );
703 p_enc->p_sys = p_sys;
705 p_enc->pf_encode_audio = Encode;
706 p_enc->fmt_in.i_codec = VLC_FOURCC('f','l','3','2');
707 p_enc->fmt_out.i_codec = VLC_FOURCC('v','o','r','b');
709 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
711 var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
712 i_quality = val.i_int;
713 if( i_quality > 10 ) i_quality = 10;
714 if( i_quality < 0 ) i_quality = 0;
715 var_Get( p_enc, ENC_CFG_PREFIX "cbr", &val );
716 if( val.b_bool ) i_quality = 0;
717 var_Get( p_enc, ENC_CFG_PREFIX "max-bitrate", &val );
718 i_max_bitrate = val.i_int;
719 var_Get( p_enc, ENC_CFG_PREFIX "min-bitrate", &val );
720 i_min_bitrate = val.i_int;
722 /* Initialize vorbis encoder */
723 vorbis_info_init( &p_sys->vi );
728 if( vorbis_encode_setup_vbr( &p_sys->vi,
729 p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
732 vorbis_info_clear( &p_sys->vi );
733 free( p_enc->p_sys );
734 msg_Err( p_enc, "VBR mode initialisation failed" );
738 /* Do we have optional hard quality restrictions? */
739 if( i_max_bitrate > 0 || i_min_bitrate > 0 )
741 struct ovectl_ratemanage_arg ai;
742 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai );
744 ai.bitrate_hard_min = i_min_bitrate;
745 ai.bitrate_hard_max = i_max_bitrate;
746 ai.management_active = 1;
748 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai );
753 /* Turn off management entirely */
754 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL );
759 if( vorbis_encode_setup_managed( &p_sys->vi,
760 p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
761 i_min_bitrate > 0 ? i_min_bitrate * 1000: -1,
762 p_enc->fmt_out.i_bitrate,
763 i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) )
765 vorbis_info_clear( &p_sys->vi );
766 msg_Err( p_enc, "CBR mode initialisation failed" );
767 free( p_enc->p_sys );
772 vorbis_encode_setup_init( &p_sys->vi );
775 vorbis_comment_init( &p_sys->vc);
776 vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player");
778 /* Set up the analysis state and auxiliary encoding storage */
779 vorbis_analysis_init( &p_sys->vd, &p_sys->vi );
780 vorbis_block_init( &p_sys->vd, &p_sys->vb );
782 /* Create and store headers */
783 vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc,
784 &header[0], &header[1], &header[2]);
785 p_enc->fmt_out.i_extra = 3 * 2 + header[0].bytes +
786 header[1].bytes + header[2].bytes;
787 p_extra = p_enc->fmt_out.p_extra = malloc( p_enc->fmt_out.i_extra );
788 for( i = 0; i < 3; i++ )
790 *(p_extra++) = header[i].bytes >> 8;
791 *(p_extra++) = header[i].bytes & 0xFF;
792 memcpy( p_extra, header[i].packet, header[i].bytes );
793 p_extra += header[i].bytes;
796 p_sys->i_channels = p_enc->fmt_in.audio.i_channels;
797 p_sys->i_last_block_size = 0;
798 p_sys->i_samples_delay = 0;
804 /****************************************************************************
805 * Encode: the whole thing
806 ****************************************************************************
807 * This function spits out ogg packets.
808 ****************************************************************************/
809 static block_t *Encode( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
811 encoder_sys_t *p_sys = p_enc->p_sys;
812 ogg_packet oggpacket;
813 block_t *p_block, *p_chain = NULL;
818 p_sys->i_pts = p_aout_buf->start_date -
819 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
820 (mtime_t)p_enc->fmt_in.audio.i_rate;
822 p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
824 buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples );
826 /* convert samples to float and uninterleave */
827 for( i = 0; i < p_sys->i_channels; i++ )
829 for( j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
831 buffer[i][j]= ((float *)p_aout_buf->p_buffer)
832 [j * p_sys->i_channels + i ];
836 vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples );
838 while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 )
842 vorbis_analysis( &p_sys->vb, NULL );
843 vorbis_bitrate_addblock( &p_sys->vb );
845 while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) )
848 p_block = block_New( p_enc, oggpacket.bytes );
849 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
851 i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket );
853 if( i_block_size < 0 ) i_block_size = 0;
854 i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
855 p_sys->i_last_block_size = i_block_size;
857 p_block->i_length = (mtime_t)1000000 *
858 (mtime_t)i_samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
860 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
862 p_sys->i_samples_delay -= i_samples;
865 p_sys->i_pts += p_block->i_length;
866 block_ChainAppend( &p_chain, p_block );
873 /*****************************************************************************
874 * CloseEncoder: vorbis encoder destruction
875 *****************************************************************************/
876 static void CloseEncoder( vlc_object_t *p_this )
878 encoder_t *p_enc = (encoder_t *)p_this;
879 encoder_sys_t *p_sys = p_enc->p_sys;
881 vorbis_block_clear( &p_sys->vb );
882 vorbis_dsp_clear( &p_sys->vd );
883 vorbis_comment_clear( &p_sys->vc );
884 vorbis_info_clear( &p_sys->vi ); /* must be called last */
889 #endif /* HAVE_VORBIS_VORBISENC_H && !MODULE_NAME_IS_tremor */