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)." )
145 set_description( _("Vorbis audio decoder") );
146 #ifdef MODULE_NAME_IS_tremor
147 set_capability( "decoder", 90 );
149 set_capability( "decoder", 100 );
151 set_callbacks( OpenDecoder, CloseDecoder );
154 set_description( _("Vorbis audio packetizer") );
155 set_capability( "packetizer", 100 );
156 set_callbacks( OpenPacketizer, CloseDecoder );
158 #ifndef MODULE_NAME_IS_tremor
159 # define ENC_CFG_PREFIX "sout-vorbis-"
161 set_description( _("Vorbis audio encoder") );
162 set_capability( "encoder", 100 );
163 set_callbacks( OpenEncoder, CloseEncoder );
165 add_integer( ENC_CFG_PREFIX "quality", 3, NULL, ENC_QUALITY_TEXT,
166 ENC_QUALITY_LONGTEXT, VLC_FALSE );
167 add_integer( ENC_CFG_PREFIX "max-bitrate", 0, NULL, ENC_MAXBR_TEXT,
168 ENC_MAXBR_LONGTEXT, VLC_FALSE );
169 add_integer( ENC_CFG_PREFIX "min-bitrate", 0, NULL, ENC_MINBR_TEXT,
170 ENC_MINBR_LONGTEXT, VLC_FALSE );
171 add_bool( ENC_CFG_PREFIX "cbr", 0, NULL, ENC_CBR_TEXT,
172 ENC_CBR_LONGTEXT, VLC_FALSE );
177 #ifndef MODULE_NAME_IS_tremor
178 static const char *ppsz_enc_options[] = {
179 "quality", "max-bitrate", "min-bitrate", "cbr", NULL
183 /*****************************************************************************
184 * OpenDecoder: probe the decoder and return score
185 *****************************************************************************/
186 static int OpenDecoder( vlc_object_t *p_this )
188 decoder_t *p_dec = (decoder_t*)p_this;
189 decoder_sys_t *p_sys;
191 if( p_dec->fmt_in.i_codec != VLC_FOURCC('v','o','r','b') )
196 /* Allocate the memory needed to store the decoder's structure */
197 if( ( p_dec->p_sys = p_sys =
198 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
200 msg_Err( p_dec, "out of memory" );
205 aout_DateSet( &p_sys->end_date, 0 );
206 p_sys->b_packetizer = VLC_FALSE;
207 p_sys->i_headers = 0;
209 /* Take care of vorbis init */
210 vorbis_info_init( &p_sys->vi );
211 vorbis_comment_init( &p_sys->vc );
213 /* Set output properties */
214 p_dec->fmt_out.i_cat = AUDIO_ES;
215 #ifdef MODULE_NAME_IS_tremor
216 p_dec->fmt_out.i_codec = VLC_FOURCC('f','i','3','2');
218 p_dec->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
222 p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
224 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
230 static int OpenPacketizer( vlc_object_t *p_this )
232 decoder_t *p_dec = (decoder_t*)p_this;
234 int i_ret = OpenDecoder( p_this );
236 if( i_ret == VLC_SUCCESS )
238 p_dec->p_sys->b_packetizer = VLC_TRUE;
239 p_dec->fmt_out.i_codec = VLC_FOURCC('v','o','r','b');
245 /****************************************************************************
246 * DecodeBlock: the whole thing
247 ****************************************************************************
248 * This function must be fed with ogg packets.
249 ****************************************************************************/
250 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
252 decoder_sys_t *p_sys = p_dec->p_sys;
253 ogg_packet oggpacket;
255 if( !pp_block ) return NULL;
259 /* Block to Ogg packet */
260 oggpacket.packet = (*pp_block)->p_buffer;
261 oggpacket.bytes = (*pp_block)->i_buffer;
265 if( p_sys->b_packetizer ) return NULL;
267 /* Block to Ogg packet */
268 oggpacket.packet = NULL;
272 oggpacket.granulepos = -1;
275 oggpacket.packetno = 0;
277 /* Check for headers */
278 if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
280 /* Headers already available as extra data */
281 p_sys->i_headers = 3;
283 else if( oggpacket.bytes && p_sys->i_headers < 3 )
285 /* Backup headers as extra data */
288 p_dec->fmt_in.p_extra =
289 realloc( p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra +
290 oggpacket.bytes + 2 );
291 p_extra = p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra;
292 *(p_extra++) = oggpacket.bytes >> 8;
293 *(p_extra++) = oggpacket.bytes & 0xFF;
295 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
296 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
298 block_Release( *pp_block );
303 if( p_sys->i_headers == 3 )
305 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
307 p_sys->i_headers = 0;
308 p_dec->fmt_in.i_extra = 0;
309 block_Release( *pp_block );
312 else p_sys->i_headers++;
315 return ProcessPacket( p_dec, &oggpacket, pp_block );
318 /*****************************************************************************
319 * ProcessHeaders: process Vorbis headers.
320 *****************************************************************************/
321 static int ProcessHeaders( decoder_t *p_dec )
323 decoder_sys_t *p_sys = p_dec->p_sys;
324 ogg_packet oggpacket;
328 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
330 oggpacket.granulepos = -1;
331 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
333 oggpacket.packetno = 0;
334 p_extra = p_dec->fmt_in.p_extra;
335 i_extra = p_dec->fmt_in.i_extra;
337 /* Take care of the initial Vorbis header */
338 oggpacket.bytes = *(p_extra++) << 8;
339 oggpacket.bytes |= (*(p_extra++) & 0xFF);
340 oggpacket.packet = p_extra;
341 p_extra += oggpacket.bytes;
342 i_extra -= (oggpacket.bytes + 2);
345 msg_Err( p_dec, "header data corrupted");
349 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
351 msg_Err( p_dec, "this bitstream does not contain Vorbis audio data");
355 /* Setup the format */
356 p_dec->fmt_out.audio.i_rate = p_sys->vi.rate;
357 p_dec->fmt_out.audio.i_channels = p_sys->vi.channels;
358 p_dec->fmt_out.audio.i_physical_channels =
359 p_dec->fmt_out.audio.i_original_channels =
360 pi_channels_maps[p_sys->vi.channels];
361 p_dec->fmt_out.i_bitrate = p_sys->vi.bitrate_nominal;
363 aout_DateInit( &p_sys->end_date, p_sys->vi.rate );
364 aout_DateSet( &p_sys->end_date, 0 );
366 msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ld",
367 p_sys->vi.channels, p_sys->vi.rate, p_sys->vi.bitrate_nominal );
369 /* The next packet in order is the comments header */
371 oggpacket.bytes = *(p_extra++) << 8;
372 oggpacket.bytes |= (*(p_extra++) & 0xFF);
373 oggpacket.packet = p_extra;
374 p_extra += oggpacket.bytes;
375 i_extra -= (oggpacket.bytes + 2);
378 msg_Err( p_dec, "header data corrupted");
382 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
384 msg_Err( p_dec, "2nd Vorbis header is corrupted" );
387 ParseVorbisComments( p_dec );
389 /* The next packet in order is the codebooks header
390 * We need to watch out that this packet is not missing as a
391 * missing or corrupted header is fatal. */
392 oggpacket.bytes = *(p_extra++) << 8;
393 oggpacket.bytes |= (*(p_extra++) & 0xFF);
394 oggpacket.packet = p_extra;
395 i_extra -= (oggpacket.bytes + 2);
398 msg_Err( p_dec, "header data corrupted");
402 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
404 msg_Err( p_dec, "3rd Vorbis header is corrupted" );
408 if( !p_sys->b_packetizer )
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 );
416 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
417 p_dec->fmt_out.p_extra =
418 realloc( p_dec->fmt_out.p_extra, 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 );
426 /*****************************************************************************
427 * ProcessPacket: processes a Vorbis packet.
428 *****************************************************************************/
429 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
432 decoder_sys_t *p_sys = p_dec->p_sys;
433 block_t *p_block = *pp_block;
435 /* Date management */
436 if( p_block && p_block->i_pts > 0 &&
437 p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
439 aout_DateSet( &p_sys->end_date, p_block->i_pts );
442 if( !aout_DateGet( &p_sys->end_date ) )
444 /* We've just started the stream, wait for the first PTS. */
445 if( p_block ) block_Release( p_block );
449 *pp_block = NULL; /* To avoid being fed the same packet again */
451 if( p_sys->b_packetizer )
453 return SendPacket( p_dec, p_oggpacket, p_block );
457 aout_buffer_t *p_aout_buffer;
459 if( p_sys->i_headers >= 3 )
460 p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
462 p_aout_buffer = NULL;
464 if( p_block ) block_Release( p_block );
465 return p_aout_buffer;
469 /*****************************************************************************
470 * DecodePacket: decodes a Vorbis packet.
471 *****************************************************************************/
472 static aout_buffer_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
474 decoder_sys_t *p_sys = p_dec->p_sys;
477 #ifdef MODULE_NAME_IS_tremor
483 if( p_oggpacket->bytes &&
484 vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 )
485 vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb );
487 /* **pp_pcm is a multichannel float vector. In stereo, for
488 * example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is
489 * the size of each channel. Convert the float values
490 * (-1.<=range<=1.) to whatever PCM format and write it out */
492 if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 )
495 aout_buffer_t *p_aout_buffer;
498 p_dec->pf_aout_buffer_new( p_dec, i_samples );
500 if( p_aout_buffer == NULL ) return NULL;
502 /* Interleave the samples */
503 #ifdef MODULE_NAME_IS_tremor
504 Interleave( (int32_t *)p_aout_buffer->p_buffer,
505 (const int32_t **)pp_pcm, p_sys->vi.channels, i_samples );
507 Interleave( (float *)p_aout_buffer->p_buffer,
508 (const float **)pp_pcm, p_sys->vi.channels, i_samples );
511 /* Tell libvorbis how many samples we actually consumed */
512 vorbis_synthesis_read( &p_sys->vd, i_samples );
514 /* Date management */
515 p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
516 p_aout_buffer->end_date = aout_DateIncrement( &p_sys->end_date,
518 return p_aout_buffer;
526 /*****************************************************************************
527 * SendPacket: send an ogg dated packet to the stream output.
528 *****************************************************************************/
529 static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
532 decoder_sys_t *p_sys = p_dec->p_sys;
533 int i_block_size, i_samples;
535 i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket );
536 if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */
537 i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
538 p_sys->i_last_block_size = i_block_size;
540 /* Date management */
541 p_block->i_dts = p_block->i_pts = aout_DateGet( &p_sys->end_date );
543 if( p_sys->i_headers >= 3 )
544 p_block->i_length = aout_DateIncrement( &p_sys->end_date, i_samples ) -
547 p_block->i_length = 0;
552 /*****************************************************************************
553 * ParseVorbisComments: FIXME should be done in demuxer
554 *****************************************************************************/
555 static void ParseVorbisComments( decoder_t *p_dec )
557 input_thread_t *p_input = (input_thread_t *)p_dec->p_parent;
558 char *psz_name, *psz_value, *psz_comment;
561 if( p_input->i_object_type != VLC_OBJECT_INPUT ) return;
563 while( i < p_dec->p_sys->vc.comments )
565 psz_comment = strdup( p_dec->p_sys->vc.user_comments[i] );
568 msg_Warn( p_dec, "out of memory" );
571 psz_name = psz_comment;
572 psz_value = strchr( psz_comment, '=' );
577 input_Control( p_input, INPUT_ADD_INFO, _("Vorbis comment"),
578 psz_name, psz_value );
585 /*****************************************************************************
586 * Interleave: helper function to interleave channels
587 *****************************************************************************/
588 static void Interleave(
589 #ifdef MODULE_NAME_IS_tremor
590 int32_t *p_out, const int32_t **pp_in,
592 float *p_out, const float **pp_in,
594 int i_nb_channels, int i_samples )
598 for ( j = 0; j < i_samples; j++ )
600 for ( i = 0; i < i_nb_channels; i++ )
602 p_out[j * i_nb_channels + i] = pp_in[i][j];
607 /*****************************************************************************
608 * CloseDecoder: vorbis decoder destruction
609 *****************************************************************************/
610 static void CloseDecoder( vlc_object_t *p_this )
612 decoder_t *p_dec = (decoder_t *)p_this;
613 decoder_sys_t *p_sys = p_dec->p_sys;
615 if( !p_sys->b_packetizer && p_sys->i_headers >= 3 )
617 vorbis_block_clear( &p_sys->vb );
618 vorbis_dsp_clear( &p_sys->vd );
621 vorbis_comment_clear( &p_sys->vc );
622 vorbis_info_clear( &p_sys->vi ); /* must be called last */
627 #if defined(HAVE_VORBIS_VORBISENC_H) && !defined(MODULE_NAME_IS_tremor)
629 /*****************************************************************************
630 * encoder_sys_t : vorbis encoder descriptor
631 *****************************************************************************/
637 vorbis_info vi; /* struct that stores all the static vorbis bitstream
639 vorbis_comment vc; /* struct that stores all the bitstream user
641 vorbis_dsp_state vd; /* central working state for the packet->PCM
643 vorbis_block vb; /* local working space for packet->PCM decode */
645 int i_last_block_size;
655 /*****************************************************************************
656 * OpenEncoder: probe the encoder and return score
657 *****************************************************************************/
658 static int OpenEncoder( vlc_object_t *p_this )
660 encoder_t *p_enc = (encoder_t *)p_this;
661 encoder_sys_t *p_sys;
662 int i_quality, i_min_bitrate, i_max_bitrate, i;
663 ogg_packet header[3];
667 if( p_enc->fmt_out.i_codec != VLC_FOURCC('v','o','r','b') &&
673 /* Allocate the memory needed to store the decoder's structure */
674 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
676 msg_Err( p_enc, "out of memory" );
679 p_enc->p_sys = p_sys;
681 p_enc->pf_encode_audio = Encode;
682 p_enc->fmt_in.i_codec = VLC_FOURCC('f','l','3','2');
683 p_enc->fmt_out.i_codec = VLC_FOURCC('v','o','r','b');
685 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
687 var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
688 i_quality = val.i_int;
689 if( i_quality > 10 ) i_quality = 10;
690 if( i_quality < 0 ) i_quality = 0;
691 var_Get( p_enc, ENC_CFG_PREFIX "cbr", &val );
692 if( val.b_bool ) i_quality = 0;
693 var_Get( p_enc, ENC_CFG_PREFIX "max-bitrate", &val );
694 i_max_bitrate = val.i_int;
695 var_Get( p_enc, ENC_CFG_PREFIX "min-bitrate", &val );
696 i_min_bitrate = val.i_int;
698 /* Initialize vorbis encoder */
699 vorbis_info_init( &p_sys->vi );
704 if( vorbis_encode_setup_vbr( &p_sys->vi,
705 p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
708 vorbis_info_clear( &p_sys->vi );
709 free( p_enc->p_sys );
710 msg_Err( p_enc, "VBR mode initialisation failed" );
714 /* Do we have optional hard quality restrictions? */
715 if( i_max_bitrate > 0 || i_min_bitrate > 0 )
717 struct ovectl_ratemanage_arg ai;
718 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai );
720 ai.bitrate_hard_min = i_min_bitrate;
721 ai.bitrate_hard_max = i_max_bitrate;
722 ai.management_active = 1;
724 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai );
729 /* Turn off management entirely */
730 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL );
735 if( vorbis_encode_setup_managed( &p_sys->vi,
736 p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
737 i_min_bitrate > 0 ? i_min_bitrate * 1000: -1,
738 p_enc->fmt_out.i_bitrate,
739 i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) )
741 vorbis_info_clear( &p_sys->vi );
742 msg_Err( p_enc, "CBR mode initialisation failed" );
743 free( p_enc->p_sys );
748 vorbis_encode_setup_init( &p_sys->vi );
751 vorbis_comment_init( &p_sys->vc);
752 vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player");
754 /* Set up the analysis state and auxiliary encoding storage */
755 vorbis_analysis_init( &p_sys->vd, &p_sys->vi );
756 vorbis_block_init( &p_sys->vd, &p_sys->vb );
758 /* Create and store headers */
759 vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc,
760 &header[0], &header[1], &header[2]);
761 p_enc->fmt_out.i_extra = 3 * 2 + header[0].bytes +
762 header[1].bytes + header[2].bytes;
763 p_extra = p_enc->fmt_out.p_extra = malloc( p_enc->fmt_out.i_extra );
764 for( i = 0; i < 3; i++ )
766 *(p_extra++) = header[i].bytes >> 8;
767 *(p_extra++) = header[i].bytes & 0xFF;
768 memcpy( p_extra, header[i].packet, header[i].bytes );
769 p_extra += header[i].bytes;
772 p_sys->i_channels = p_enc->fmt_in.audio.i_channels;
773 p_sys->i_last_block_size = 0;
774 p_sys->i_samples_delay = 0;
780 /****************************************************************************
781 * Encode: the whole thing
782 ****************************************************************************
783 * This function spits out ogg packets.
784 ****************************************************************************/
785 static block_t *Encode( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
787 encoder_sys_t *p_sys = p_enc->p_sys;
788 ogg_packet oggpacket;
789 block_t *p_block, *p_chain = NULL;
794 p_sys->i_pts = p_aout_buf->start_date -
795 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
796 (mtime_t)p_enc->fmt_in.audio.i_rate;
798 p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
800 buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples );
802 /* convert samples to float and uninterleave */
803 for( i = 0; i < p_sys->i_channels; i++ )
805 for( j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
807 buffer[i][j]= ((float *)p_aout_buf->p_buffer)
808 [j * p_sys->i_channels + i ];
812 vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples );
814 while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 )
818 vorbis_analysis( &p_sys->vb, NULL );
819 vorbis_bitrate_addblock( &p_sys->vb );
821 while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) )
824 p_block = block_New( p_enc, oggpacket.bytes );
825 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
827 i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket );
829 if( i_block_size < 0 ) i_block_size = 0;
830 i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
831 p_sys->i_last_block_size = i_block_size;
833 p_block->i_length = (mtime_t)1000000 *
834 (mtime_t)i_samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
836 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
838 p_sys->i_samples_delay -= i_samples;
841 p_sys->i_pts += p_block->i_length;
842 block_ChainAppend( &p_chain, p_block );
849 /*****************************************************************************
850 * CloseEncoder: vorbis encoder destruction
851 *****************************************************************************/
852 static void CloseEncoder( vlc_object_t *p_this )
854 encoder_t *p_enc = (encoder_t *)p_this;
855 encoder_sys_t *p_sys = p_enc->p_sys;
857 vorbis_block_clear( &p_sys->vb );
858 vorbis_dsp_clear( &p_sys->vd );
859 vorbis_comment_clear( &p_sys->vc );
860 vorbis_info_clear( &p_sys->vi ); /* must be called last */
865 #endif /* HAVE_VORBIS_VORBISENC_H && !MODULE_NAME_IS_tremor */