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_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 set_callbacks( OpenEncoder, CloseEncoder );
167 add_integer( ENC_CFG_PREFIX "quality", 3, NULL, ENC_QUALITY_TEXT,
168 ENC_QUALITY_LONGTEXT, VLC_FALSE );
169 add_integer( ENC_CFG_PREFIX "max-bitrate", 0, NULL, ENC_MAXBR_TEXT,
170 ENC_MAXBR_LONGTEXT, VLC_FALSE );
171 add_integer( ENC_CFG_PREFIX "min-bitrate", 0, NULL, ENC_MINBR_TEXT,
172 ENC_MINBR_LONGTEXT, VLC_FALSE );
173 add_bool( ENC_CFG_PREFIX "cbr", 0, NULL, ENC_CBR_TEXT,
174 ENC_CBR_LONGTEXT, VLC_FALSE );
179 #ifndef MODULE_NAME_IS_tremor
180 static const char *ppsz_enc_options[] = {
181 "quality", "max-bitrate", "min-bitrate", "cbr", NULL
185 /*****************************************************************************
186 * OpenDecoder: probe the decoder and return score
187 *****************************************************************************/
188 static int OpenDecoder( vlc_object_t *p_this )
190 decoder_t *p_dec = (decoder_t*)p_this;
191 decoder_sys_t *p_sys;
193 if( p_dec->fmt_in.i_codec != VLC_FOURCC('v','o','r','b') )
198 /* Allocate the memory needed to store the decoder's structure */
199 if( ( p_dec->p_sys = p_sys =
200 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
202 msg_Err( p_dec, "out of memory" );
207 aout_DateSet( &p_sys->end_date, 0 );
208 p_sys->b_packetizer = VLC_FALSE;
209 p_sys->i_headers = 0;
211 /* Take care of vorbis init */
212 vorbis_info_init( &p_sys->vi );
213 vorbis_comment_init( &p_sys->vc );
215 /* Set output properties */
216 p_dec->fmt_out.i_cat = AUDIO_ES;
217 #ifdef MODULE_NAME_IS_tremor
218 p_dec->fmt_out.i_codec = VLC_FOURCC('f','i','3','2');
220 p_dec->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
224 p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
226 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
232 static int OpenPacketizer( vlc_object_t *p_this )
234 decoder_t *p_dec = (decoder_t*)p_this;
236 int i_ret = OpenDecoder( p_this );
238 if( i_ret == VLC_SUCCESS )
240 p_dec->p_sys->b_packetizer = VLC_TRUE;
241 p_dec->fmt_out.i_codec = VLC_FOURCC('v','o','r','b');
247 /****************************************************************************
248 * DecodeBlock: the whole thing
249 ****************************************************************************
250 * This function must be fed with ogg packets.
251 ****************************************************************************/
252 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
254 decoder_sys_t *p_sys = p_dec->p_sys;
255 ogg_packet oggpacket;
257 if( !pp_block ) return NULL;
261 /* Block to Ogg packet */
262 oggpacket.packet = (*pp_block)->p_buffer;
263 oggpacket.bytes = (*pp_block)->i_buffer;
267 if( p_sys->b_packetizer ) return NULL;
269 /* Block to Ogg packet */
270 oggpacket.packet = NULL;
274 oggpacket.granulepos = -1;
277 oggpacket.packetno = 0;
279 /* Check for headers */
280 if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
282 /* Headers already available as extra data */
283 p_sys->i_headers = 3;
285 else if( oggpacket.bytes && p_sys->i_headers < 3 )
287 /* Backup headers as extra data */
290 p_dec->fmt_in.p_extra =
291 realloc( p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra +
292 oggpacket.bytes + 2 );
293 p_extra = p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra;
294 *(p_extra++) = oggpacket.bytes >> 8;
295 *(p_extra++) = oggpacket.bytes & 0xFF;
297 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
298 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
300 block_Release( *pp_block );
305 if( p_sys->i_headers == 3 )
307 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
309 p_sys->i_headers = 0;
310 p_dec->fmt_in.i_extra = 0;
311 block_Release( *pp_block );
314 else p_sys->i_headers++;
317 return ProcessPacket( p_dec, &oggpacket, pp_block );
320 /*****************************************************************************
321 * ProcessHeaders: process Vorbis headers.
322 *****************************************************************************/
323 static int ProcessHeaders( decoder_t *p_dec )
325 decoder_sys_t *p_sys = p_dec->p_sys;
326 ogg_packet oggpacket;
330 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
332 oggpacket.granulepos = -1;
333 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
335 oggpacket.packetno = 0;
336 p_extra = p_dec->fmt_in.p_extra;
337 i_extra = p_dec->fmt_in.i_extra;
339 /* Take care of the initial Vorbis header */
340 oggpacket.bytes = *(p_extra++) << 8;
341 oggpacket.bytes |= (*(p_extra++) & 0xFF);
342 oggpacket.packet = p_extra;
343 p_extra += oggpacket.bytes;
344 i_extra -= (oggpacket.bytes + 2);
347 msg_Err( p_dec, "header data corrupted");
351 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
353 msg_Err( p_dec, "this bitstream does not contain Vorbis audio data");
357 /* Setup the format */
358 p_dec->fmt_out.audio.i_rate = p_sys->vi.rate;
359 p_dec->fmt_out.audio.i_channels = p_sys->vi.channels;
360 p_dec->fmt_out.audio.i_physical_channels =
361 p_dec->fmt_out.audio.i_original_channels =
362 pi_channels_maps[p_sys->vi.channels];
363 p_dec->fmt_out.i_bitrate = p_sys->vi.bitrate_nominal;
365 aout_DateInit( &p_sys->end_date, p_sys->vi.rate );
366 aout_DateSet( &p_sys->end_date, 0 );
368 msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ld",
369 p_sys->vi.channels, p_sys->vi.rate, p_sys->vi.bitrate_nominal );
371 /* The next packet in order is the comments header */
373 oggpacket.bytes = *(p_extra++) << 8;
374 oggpacket.bytes |= (*(p_extra++) & 0xFF);
375 oggpacket.packet = p_extra;
376 p_extra += oggpacket.bytes;
377 i_extra -= (oggpacket.bytes + 2);
380 msg_Err( p_dec, "header data corrupted");
384 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
386 msg_Err( p_dec, "2nd Vorbis header is corrupted" );
389 ParseVorbisComments( p_dec );
391 /* The next packet in order is the codebooks header
392 * We need to watch out that this packet is not missing as a
393 * missing or corrupted header is fatal. */
394 oggpacket.bytes = *(p_extra++) << 8;
395 oggpacket.bytes |= (*(p_extra++) & 0xFF);
396 oggpacket.packet = p_extra;
397 i_extra -= (oggpacket.bytes + 2);
400 msg_Err( p_dec, "header data corrupted");
404 if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
406 msg_Err( p_dec, "3rd Vorbis header is corrupted" );
410 if( !p_sys->b_packetizer )
412 /* Initialize the Vorbis packet->PCM decoder */
413 vorbis_synthesis_init( &p_sys->vd, &p_sys->vi );
414 vorbis_block_init( &p_sys->vd, &p_sys->vb );
418 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
419 p_dec->fmt_out.p_extra =
420 realloc( p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
421 memcpy( p_dec->fmt_out.p_extra,
422 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
428 /*****************************************************************************
429 * ProcessPacket: processes a Vorbis packet.
430 *****************************************************************************/
431 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
434 decoder_sys_t *p_sys = p_dec->p_sys;
435 block_t *p_block = *pp_block;
437 /* Date management */
438 if( p_block && p_block->i_pts > 0 &&
439 p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
441 aout_DateSet( &p_sys->end_date, p_block->i_pts );
444 if( !aout_DateGet( &p_sys->end_date ) )
446 /* We've just started the stream, wait for the first PTS. */
447 if( p_block ) block_Release( p_block );
451 *pp_block = NULL; /* To avoid being fed the same packet again */
453 if( p_sys->b_packetizer )
455 return SendPacket( p_dec, p_oggpacket, p_block );
459 aout_buffer_t *p_aout_buffer;
461 if( p_sys->i_headers >= 3 )
462 p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
464 p_aout_buffer = NULL;
466 if( p_block ) block_Release( p_block );
467 return p_aout_buffer;
471 /*****************************************************************************
472 * DecodePacket: decodes a Vorbis packet.
473 *****************************************************************************/
474 static aout_buffer_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
476 decoder_sys_t *p_sys = p_dec->p_sys;
479 #ifdef MODULE_NAME_IS_tremor
485 if( p_oggpacket->bytes &&
486 vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 )
487 vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb );
489 /* **pp_pcm is a multichannel float vector. In stereo, for
490 * example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is
491 * the size of each channel. Convert the float values
492 * (-1.<=range<=1.) to whatever PCM format and write it out */
494 if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 )
497 aout_buffer_t *p_aout_buffer;
500 p_dec->pf_aout_buffer_new( p_dec, i_samples );
502 if( p_aout_buffer == NULL ) return NULL;
504 /* Interleave the samples */
505 #ifdef MODULE_NAME_IS_tremor
506 Interleave( (int32_t *)p_aout_buffer->p_buffer,
507 (const int32_t **)pp_pcm, p_sys->vi.channels, i_samples );
509 Interleave( (float *)p_aout_buffer->p_buffer,
510 (const float **)pp_pcm, p_sys->vi.channels, i_samples );
513 /* Tell libvorbis how many samples we actually consumed */
514 vorbis_synthesis_read( &p_sys->vd, i_samples );
516 /* Date management */
517 p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
518 p_aout_buffer->end_date = aout_DateIncrement( &p_sys->end_date,
520 return p_aout_buffer;
528 /*****************************************************************************
529 * SendPacket: send an ogg dated packet to the stream output.
530 *****************************************************************************/
531 static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
534 decoder_sys_t *p_sys = p_dec->p_sys;
535 int i_block_size, i_samples;
537 i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket );
538 if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */
539 i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
540 p_sys->i_last_block_size = i_block_size;
542 /* Date management */
543 p_block->i_dts = p_block->i_pts = aout_DateGet( &p_sys->end_date );
545 if( p_sys->i_headers >= 3 )
546 p_block->i_length = aout_DateIncrement( &p_sys->end_date, i_samples ) -
549 p_block->i_length = 0;
554 /*****************************************************************************
555 * ParseVorbisComments: FIXME should be done in demuxer
556 *****************************************************************************/
557 static void ParseVorbisComments( decoder_t *p_dec )
559 input_thread_t *p_input = (input_thread_t *)p_dec->p_parent;
560 char *psz_name, *psz_value, *psz_comment;
563 if( p_input->i_object_type != VLC_OBJECT_INPUT ) return;
565 while( i < p_dec->p_sys->vc.comments )
567 psz_comment = strdup( p_dec->p_sys->vc.user_comments[i] );
570 msg_Warn( p_dec, "out of memory" );
573 psz_name = psz_comment;
574 psz_value = strchr( psz_comment, '=' );
579 input_Control( p_input, INPUT_ADD_INFO, _("Vorbis comment"),
580 psz_name, psz_value );
581 /* HACK, we should use meta */
582 if( strstr( psz_name, "artist" ) )
584 input_Control( p_input, INPUT_ADD_INFO, _("Meta-information"),
585 _("Artist"), psz_value );
587 else if( strstr( psz_name, "title" ) )
589 p_input->input.p_item->psz_name = strdup( psz_value );
593 var_SetInteger( p_input, "item-change", p_input->input.p_item->i_id );
599 /*****************************************************************************
600 * Interleave: helper function to interleave channels
601 *****************************************************************************/
602 static void Interleave(
603 #ifdef MODULE_NAME_IS_tremor
604 int32_t *p_out, const int32_t **pp_in,
606 float *p_out, const float **pp_in,
608 int i_nb_channels, int i_samples )
612 for ( j = 0; j < i_samples; j++ )
614 for ( i = 0; i < i_nb_channels; i++ )
616 p_out[j * i_nb_channels + i] = pp_in[i][j];
621 /*****************************************************************************
622 * CloseDecoder: vorbis decoder destruction
623 *****************************************************************************/
624 static void CloseDecoder( vlc_object_t *p_this )
626 decoder_t *p_dec = (decoder_t *)p_this;
627 decoder_sys_t *p_sys = p_dec->p_sys;
629 if( !p_sys->b_packetizer && p_sys->i_headers >= 3 )
631 vorbis_block_clear( &p_sys->vb );
632 vorbis_dsp_clear( &p_sys->vd );
635 vorbis_comment_clear( &p_sys->vc );
636 vorbis_info_clear( &p_sys->vi ); /* must be called last */
641 #if defined(HAVE_VORBIS_VORBISENC_H) && !defined(MODULE_NAME_IS_tremor)
643 /*****************************************************************************
644 * encoder_sys_t : vorbis encoder descriptor
645 *****************************************************************************/
651 vorbis_info vi; /* struct that stores all the static vorbis bitstream
653 vorbis_comment vc; /* struct that stores all the bitstream user
655 vorbis_dsp_state vd; /* central working state for the packet->PCM
657 vorbis_block vb; /* local working space for packet->PCM decode */
659 int i_last_block_size;
669 /*****************************************************************************
670 * OpenEncoder: probe the encoder and return score
671 *****************************************************************************/
672 static int OpenEncoder( vlc_object_t *p_this )
674 encoder_t *p_enc = (encoder_t *)p_this;
675 encoder_sys_t *p_sys;
676 int i_quality, i_min_bitrate, i_max_bitrate, i;
677 ogg_packet header[3];
681 if( p_enc->fmt_out.i_codec != VLC_FOURCC('v','o','r','b') &&
687 /* Allocate the memory needed to store the decoder's structure */
688 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
690 msg_Err( p_enc, "out of memory" );
693 p_enc->p_sys = p_sys;
695 p_enc->pf_encode_audio = Encode;
696 p_enc->fmt_in.i_codec = VLC_FOURCC('f','l','3','2');
697 p_enc->fmt_out.i_codec = VLC_FOURCC('v','o','r','b');
699 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
701 var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
702 i_quality = val.i_int;
703 if( i_quality > 10 ) i_quality = 10;
704 if( i_quality < 0 ) i_quality = 0;
705 var_Get( p_enc, ENC_CFG_PREFIX "cbr", &val );
706 if( val.b_bool ) i_quality = 0;
707 var_Get( p_enc, ENC_CFG_PREFIX "max-bitrate", &val );
708 i_max_bitrate = val.i_int;
709 var_Get( p_enc, ENC_CFG_PREFIX "min-bitrate", &val );
710 i_min_bitrate = val.i_int;
712 /* Initialize vorbis encoder */
713 vorbis_info_init( &p_sys->vi );
718 if( vorbis_encode_setup_vbr( &p_sys->vi,
719 p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
722 vorbis_info_clear( &p_sys->vi );
723 free( p_enc->p_sys );
724 msg_Err( p_enc, "VBR mode initialisation failed" );
728 /* Do we have optional hard quality restrictions? */
729 if( i_max_bitrate > 0 || i_min_bitrate > 0 )
731 struct ovectl_ratemanage_arg ai;
732 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai );
734 ai.bitrate_hard_min = i_min_bitrate;
735 ai.bitrate_hard_max = i_max_bitrate;
736 ai.management_active = 1;
738 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai );
743 /* Turn off management entirely */
744 vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL );
749 if( vorbis_encode_setup_managed( &p_sys->vi,
750 p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
751 i_min_bitrate > 0 ? i_min_bitrate * 1000: -1,
752 p_enc->fmt_out.i_bitrate,
753 i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) )
755 vorbis_info_clear( &p_sys->vi );
756 msg_Err( p_enc, "CBR mode initialisation failed" );
757 free( p_enc->p_sys );
762 vorbis_encode_setup_init( &p_sys->vi );
765 vorbis_comment_init( &p_sys->vc);
766 vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player");
768 /* Set up the analysis state and auxiliary encoding storage */
769 vorbis_analysis_init( &p_sys->vd, &p_sys->vi );
770 vorbis_block_init( &p_sys->vd, &p_sys->vb );
772 /* Create and store headers */
773 vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc,
774 &header[0], &header[1], &header[2]);
775 p_enc->fmt_out.i_extra = 3 * 2 + header[0].bytes +
776 header[1].bytes + header[2].bytes;
777 p_extra = p_enc->fmt_out.p_extra = malloc( p_enc->fmt_out.i_extra );
778 for( i = 0; i < 3; i++ )
780 *(p_extra++) = header[i].bytes >> 8;
781 *(p_extra++) = header[i].bytes & 0xFF;
782 memcpy( p_extra, header[i].packet, header[i].bytes );
783 p_extra += header[i].bytes;
786 p_sys->i_channels = p_enc->fmt_in.audio.i_channels;
787 p_sys->i_last_block_size = 0;
788 p_sys->i_samples_delay = 0;
794 /****************************************************************************
795 * Encode: the whole thing
796 ****************************************************************************
797 * This function spits out ogg packets.
798 ****************************************************************************/
799 static block_t *Encode( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
801 encoder_sys_t *p_sys = p_enc->p_sys;
802 ogg_packet oggpacket;
803 block_t *p_block, *p_chain = NULL;
808 p_sys->i_pts = p_aout_buf->start_date -
809 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
810 (mtime_t)p_enc->fmt_in.audio.i_rate;
812 p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
814 buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples );
816 /* convert samples to float and uninterleave */
817 for( i = 0; i < p_sys->i_channels; i++ )
819 for( j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
821 buffer[i][j]= ((float *)p_aout_buf->p_buffer)
822 [j * p_sys->i_channels + i ];
826 vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples );
828 while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 )
832 vorbis_analysis( &p_sys->vb, NULL );
833 vorbis_bitrate_addblock( &p_sys->vb );
835 while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) )
838 p_block = block_New( p_enc, oggpacket.bytes );
839 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
841 i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket );
843 if( i_block_size < 0 ) i_block_size = 0;
844 i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
845 p_sys->i_last_block_size = i_block_size;
847 p_block->i_length = (mtime_t)1000000 *
848 (mtime_t)i_samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
850 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
852 p_sys->i_samples_delay -= i_samples;
855 p_sys->i_pts += p_block->i_length;
856 block_ChainAppend( &p_chain, p_block );
863 /*****************************************************************************
864 * CloseEncoder: vorbis encoder destruction
865 *****************************************************************************/
866 static void CloseEncoder( vlc_object_t *p_this )
868 encoder_t *p_enc = (encoder_t *)p_this;
869 encoder_sys_t *p_sys = p_enc->p_sys;
871 vorbis_block_clear( &p_sys->vb );
872 vorbis_dsp_clear( &p_sys->vd );
873 vorbis_comment_clear( &p_sys->vc );
874 vorbis_info_clear( &p_sys->vi ); /* must be called last */
879 #endif /* HAVE_VORBIS_VORBISENC_H && !MODULE_NAME_IS_tremor */