1 /*****************************************************************************
2 * speex.c: speex decoder/packetizer/encoder module making use of libspeex.
3 *****************************************************************************
4 * Copyright (C) 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
28 #include <vlc_input.h>
29 #include <vlc_codec.h>
33 #include <speex/speex.h>
34 #include <speex/speex_header.h>
35 #include <speex/speex_stereo.h>
36 #include <speex/speex_callbacks.h>
40 /*****************************************************************************
41 * decoder_sys_t : speex decoder descriptor
42 *****************************************************************************/
46 vlc_bool_t b_packetizer;
52 int i_frame_in_packet;
58 SpeexHeader *p_header;
59 SpeexStereoState stereo;
65 audio_date_t end_date;
69 static int pi_channels_maps[6] =
72 AOUT_CHAN_CENTER, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
73 AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
74 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
75 | AOUT_CHAN_REARRIGHT,
76 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
77 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
80 /****************************************************************************
82 ****************************************************************************/
83 static int OpenDecoder ( vlc_object_t * );
84 static int OpenPacketizer( vlc_object_t * );
85 static void CloseDecoder ( vlc_object_t * );
87 static void *DecodeBlock ( decoder_t *, block_t ** );
88 static int ProcessHeaders( decoder_t * );
89 static int ProcessInitialHeader ( decoder_t *, ogg_packet * );
90 static void *ProcessPacket( decoder_t *, ogg_packet *, block_t ** );
92 static aout_buffer_t *DecodePacket( decoder_t *, ogg_packet * );
93 static block_t *SendPacket( decoder_t *, ogg_packet *, block_t * );
95 static void ParseSpeexComments( decoder_t *, ogg_packet * );
97 static int OpenEncoder ( vlc_object_t * );
98 static void CloseEncoder ( vlc_object_t * );
99 static block_t *Encode ( encoder_t *, aout_buffer_t * );
101 /*****************************************************************************
103 *****************************************************************************/
105 set_category( CAT_INPUT );
106 set_subcategory( SUBCAT_INPUT_ACODEC );
108 set_description( _("Speex audio decoder") );
109 set_capability( "decoder", 100 );
110 set_callbacks( OpenDecoder, CloseDecoder );
113 set_description( _("Speex audio packetizer") );
114 set_capability( "packetizer", 100 );
115 set_callbacks( OpenPacketizer, CloseDecoder );
118 set_description( _("Speex audio encoder") );
119 set_capability( "encoder", 100 );
120 set_callbacks( OpenEncoder, CloseEncoder );
123 /*****************************************************************************
124 * OpenDecoder: probe the decoder and return score
125 *****************************************************************************/
126 static int OpenDecoder( vlc_object_t *p_this )
128 decoder_t *p_dec = (decoder_t*)p_this;
129 decoder_sys_t *p_sys = p_dec->p_sys;
131 if( p_dec->fmt_in.i_codec != VLC_FOURCC('s','p','x',' ') )
136 /* Allocate the memory needed to store the decoder's structure */
137 if( ( p_dec->p_sys = p_sys =
138 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
140 msg_Err( p_dec, "out of memory" );
143 p_dec->p_sys->b_packetizer = VLC_FALSE;
145 aout_DateSet( &p_sys->end_date, 0 );
147 /* Set output properties */
148 p_dec->fmt_out.i_cat = AUDIO_ES;
149 p_dec->fmt_out.i_codec = AOUT_FMT_S16_NE;
152 p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
154 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
157 p_sys->i_headers = 0;
158 p_sys->p_state = NULL;
159 p_sys->p_header = NULL;
160 p_sys->i_frame_in_packet = 0;
165 static int OpenPacketizer( vlc_object_t *p_this )
167 decoder_t *p_dec = (decoder_t*)p_this;
169 int i_ret = OpenDecoder( p_this );
171 if( i_ret == VLC_SUCCESS )
173 p_dec->p_sys->b_packetizer = VLC_TRUE;
174 p_dec->fmt_out.i_codec = VLC_FOURCC('s','p','x',' ');
180 /****************************************************************************
181 * DecodeBlock: the whole thing
182 ****************************************************************************
183 * This function must be fed with ogg packets.
184 ****************************************************************************/
185 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
187 decoder_sys_t *p_sys = p_dec->p_sys;
188 ogg_packet oggpacket;
190 if( !pp_block ) return NULL;
194 /* Block to Ogg packet */
195 oggpacket.packet = (*pp_block)->p_buffer;
196 oggpacket.bytes = (*pp_block)->i_buffer;
200 if( p_sys->b_packetizer ) return NULL;
202 /* Block to Ogg packet */
203 oggpacket.packet = NULL;
207 oggpacket.granulepos = -1;
210 oggpacket.packetno = 0;
212 /* Check for headers */
213 if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
215 /* Headers already available as extra data */
216 p_sys->i_headers = 2;
218 else if( oggpacket.bytes && p_sys->i_headers < 2 )
220 /* Backup headers as extra data */
223 p_dec->fmt_in.p_extra =
224 realloc( p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra +
225 oggpacket.bytes + 2 );
226 p_extra = ((uint8_t *)p_dec->fmt_in.p_extra) + p_dec->fmt_in.i_extra;
227 *(p_extra++) = oggpacket.bytes >> 8;
228 *(p_extra++) = oggpacket.bytes & 0xFF;
230 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
231 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
233 block_Release( *pp_block );
238 if( p_sys->i_headers == 2 )
240 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
242 p_sys->i_headers = 0;
243 p_dec->fmt_in.i_extra = 0;
244 block_Release( *pp_block );
247 else p_sys->i_headers++;
250 return ProcessPacket( p_dec, &oggpacket, pp_block );
253 /*****************************************************************************
254 * ProcessHeaders: process Speex headers.
255 *****************************************************************************/
256 static int ProcessHeaders( decoder_t *p_dec )
258 decoder_sys_t *p_sys = p_dec->p_sys;
259 ogg_packet oggpacket;
263 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
265 oggpacket.granulepos = -1;
266 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
268 oggpacket.packetno = 0;
269 p_extra = p_dec->fmt_in.p_extra;
270 i_extra = p_dec->fmt_in.i_extra;
272 /* Take care of the initial Vorbis header */
273 oggpacket.bytes = *(p_extra++) << 8;
274 oggpacket.bytes |= (*(p_extra++) & 0xFF);
275 oggpacket.packet = p_extra;
276 p_extra += oggpacket.bytes;
277 i_extra -= (oggpacket.bytes + 2);
280 msg_Err( p_dec, "header data corrupted");
284 /* Take care of the initial Speex header */
285 if( ProcessInitialHeader( p_dec, &oggpacket ) != VLC_SUCCESS )
287 msg_Err( p_dec, "initial Speex header is corrupted" );
291 /* The next packet in order is the comments header */
293 oggpacket.bytes = *(p_extra++) << 8;
294 oggpacket.bytes |= (*(p_extra++) & 0xFF);
295 oggpacket.packet = p_extra;
296 p_extra += oggpacket.bytes;
297 i_extra -= (oggpacket.bytes + 2);
300 msg_Err( p_dec, "header data corrupted");
304 ParseSpeexComments( p_dec, &oggpacket );
306 if( p_sys->b_packetizer )
308 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
309 p_dec->fmt_out.p_extra =
310 realloc( p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
311 memcpy( p_dec->fmt_out.p_extra,
312 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
318 /*****************************************************************************
319 * ProcessInitialHeader: processes the inital Speex header packet.
320 *****************************************************************************/
321 static int ProcessInitialHeader( decoder_t *p_dec, ogg_packet *p_oggpacket )
323 decoder_sys_t *p_sys = p_dec->p_sys;
326 SpeexHeader *p_header;
327 const SpeexMode *p_mode;
328 SpeexCallback callback;
330 p_sys->p_header = p_header =
331 speex_packet_to_header( (char *)p_oggpacket->packet,
332 p_oggpacket->bytes );
335 msg_Err( p_dec, "cannot read Speex header" );
338 if( p_header->mode >= SPEEX_NB_MODES )
340 msg_Err( p_dec, "mode number %d does not (yet/any longer) exist in "
341 "this version of libspeex.", p_header->mode );
345 p_mode = speex_mode_list[p_header->mode];
349 if( p_header->speex_version_id > 1 )
351 msg_Err( p_dec, "this file was encoded with Speex bit-stream "
352 "version %d which is not supported by this decoder.",
353 p_header->speex_version_id );
357 if( p_mode->bitstream_version < p_header->mode_bitstream_version )
359 msg_Err( p_dec, "file encoded with a newer version of Speex." );
362 if( p_mode->bitstream_version > p_header->mode_bitstream_version )
364 msg_Err( p_dec, "file encoded with an older version of Speex." );
368 msg_Dbg( p_dec, "Speex %d Hz audio using %s mode %s%s",
369 p_header->rate, p_mode->modeName,
370 ( p_header->nb_channels == 1 ) ? " (mono" : " (stereo",
371 p_header->vbr ? ", VBR)" : ")" );
373 /* Take care of speex decoder init */
374 speex_bits_init( &p_sys->bits );
375 p_sys->p_state = p_state = speex_decoder_init( p_mode );
378 msg_Err( p_dec, "decoder initialization failed" );
382 if( p_header->nb_channels == 2 )
384 SpeexStereoState stereo = SPEEX_STEREO_STATE_INIT;
385 p_sys->stereo = stereo;
386 callback.callback_id = SPEEX_INBAND_STEREO;
387 callback.func = speex_std_stereo_request_handler;
388 callback.data = &p_sys->stereo;
389 speex_decoder_ctl( p_state, SPEEX_SET_HANDLER, &callback );
391 if( p_header->nb_channels <= 0 ||
392 p_header->nb_channels > 5 )
394 msg_Err( p_dec, "invalid number of channels (not between 1 and 5): %i",
395 p_header->nb_channels );
399 /* Setup the format */
400 p_dec->fmt_out.audio.i_physical_channels =
401 p_dec->fmt_out.audio.i_original_channels =
402 pi_channels_maps[p_header->nb_channels];
403 p_dec->fmt_out.audio.i_channels = p_header->nb_channels;
404 p_dec->fmt_out.audio.i_rate = p_header->rate;
406 aout_DateInit( &p_sys->end_date, p_header->rate );
411 /*****************************************************************************
412 * ProcessPacket: processes a Speex packet.
413 *****************************************************************************/
414 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
417 decoder_sys_t *p_sys = p_dec->p_sys;
418 block_t *p_block = *pp_block;
420 /* Date management */
421 if( p_block && p_block->i_pts > 0 &&
422 p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
424 aout_DateSet( &p_sys->end_date, p_block->i_pts );
427 if( !aout_DateGet( &p_sys->end_date ) )
429 /* We've just started the stream, wait for the first PTS. */
430 if( p_block ) block_Release( p_block );
434 *pp_block = NULL; /* To avoid being fed the same packet again */
436 if( p_sys->b_packetizer )
438 return SendPacket( p_dec, p_oggpacket, p_block );
442 aout_buffer_t *p_aout_buffer;
444 if( p_sys->i_headers >= p_sys->p_header->extra_headers + 2 )
445 p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
447 p_aout_buffer = NULL; /* Skip headers */
449 if( p_block ) block_Release( p_block );
450 return p_aout_buffer;
454 /*****************************************************************************
455 * DecodePacket: decodes a Speex packet.
456 *****************************************************************************/
457 static aout_buffer_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
459 decoder_sys_t *p_sys = p_dec->p_sys;
461 if( p_oggpacket->bytes )
463 /* Copy Ogg packet to Speex bitstream */
464 speex_bits_read_from( &p_sys->bits, (char *)p_oggpacket->packet,
465 p_oggpacket->bytes );
466 p_sys->i_frame_in_packet = 0;
469 /* Decode one frame at a time */
470 if( p_sys->i_frame_in_packet < p_sys->p_header->frames_per_packet )
472 aout_buffer_t *p_aout_buffer;
473 if( p_sys->p_header->frame_size == 0 )
477 p_dec->pf_aout_buffer_new( p_dec, p_sys->p_header->frame_size );
483 switch( speex_decode_int( p_sys->p_state, &p_sys->bits,
484 (int16_t *)p_aout_buffer->p_buffer ) )
487 msg_Warn( p_dec, "decoding error: corrupted stream?" );
488 case -1: /* End of stream */
492 if( speex_bits_remaining( &p_sys->bits ) < 0 )
494 msg_Warn( p_dec, "decoding overflow: corrupted stream?" );
497 if( p_sys->p_header->nb_channels == 2 )
498 speex_decode_stereo_int( (int16_t *)p_aout_buffer->p_buffer,
499 p_sys->p_header->frame_size,
502 /* Date management */
503 p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
504 p_aout_buffer->end_date =
505 aout_DateIncrement( &p_sys->end_date, p_sys->p_header->frame_size);
507 p_sys->i_frame_in_packet++;
509 return p_aout_buffer;
517 /*****************************************************************************
518 * SendPacket: send an ogg packet to the stream output.
519 *****************************************************************************/
520 static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
523 decoder_sys_t *p_sys = p_dec->p_sys;
525 /* Date management */
526 p_block->i_dts = p_block->i_pts = aout_DateGet( &p_sys->end_date );
528 if( p_sys->i_headers >= p_sys->p_header->extra_headers + 2 )
530 aout_DateIncrement( &p_sys->end_date,
531 p_sys->p_header->frame_size ) -
534 p_block->i_length = 0;
539 /*****************************************************************************
540 * ParseSpeexComments: FIXME should be done in demuxer
541 *****************************************************************************/
542 #define readint(buf, base) (((buf[base+3]<<24)&0xff000000)| \
543 ((buf[base+2]<<16)&0xff0000)| \
544 ((buf[base+1]<<8)&0xff00)| \
547 static void ParseSpeexComments( decoder_t *p_dec, ogg_packet *p_oggpacket )
549 input_thread_t *p_input = (input_thread_t *)p_dec->p_parent;
550 decoder_sys_t *p_sys = p_dec->p_sys;
552 char *p_buf = (char *)p_oggpacket->packet;
553 const SpeexMode *p_mode;
556 if( p_input->i_object_type != VLC_OBJECT_INPUT ) return;
558 assert( p_sys->p_header->mode < SPEEX_NB_MODES );
560 p_mode = speex_mode_list[p_sys->p_header->mode];
561 assert( p_mode != NULL );
563 input_Control( p_input, INPUT_ADD_INFO, _("Speex comment"), _("Mode"),
564 "%s%s", p_mode->modeName,
565 p_sys->p_header->vbr ? " VBR" : "" );
567 if( p_oggpacket->bytes < 8 )
569 msg_Warn( p_dec, "invalid/corrupted comments" );
573 i_len = readint( p_buf, 0 ); p_buf += 4;
574 if( i_len > p_oggpacket->bytes - 4 )
576 msg_Warn( p_dec, "invalid/corrupted comments" );
580 input_Control( p_input, INPUT_ADD_INFO, _("Speex comment"), p_buf, "" );
582 /* TODO: finish comments parsing */
585 /*****************************************************************************
586 * CloseDecoder: speex decoder destruction
587 *****************************************************************************/
588 static void CloseDecoder( vlc_object_t *p_this )
590 decoder_t * p_dec = (decoder_t *)p_this;
591 decoder_sys_t *p_sys = p_dec->p_sys;
595 speex_decoder_destroy( p_sys->p_state );
596 speex_bits_destroy( &p_sys->bits );
599 if( p_sys->p_header ) free( p_sys->p_header );
603 /*****************************************************************************
604 * encoder_sys_t: encoder descriptor
605 *****************************************************************************/
606 #define MAX_FRAME_SIZE 2000
607 #define MAX_FRAME_BYTES 2000
615 char p_buffer_out[MAX_FRAME_BYTES];
622 SpeexStereoState stereo;
625 int i_frames_per_packet;
626 int i_frames_in_packet;
638 /*****************************************************************************
639 * OpenEncoder: probe the encoder and return score
640 *****************************************************************************/
641 static int OpenEncoder( vlc_object_t *p_this )
643 encoder_t *p_enc = (encoder_t *)p_this;
644 encoder_sys_t *p_sys;
645 const SpeexMode *p_speex_mode = &speex_nb_mode;
647 const char *pp_header[2];
651 if( p_enc->fmt_out.i_codec != VLC_FOURCC('s','p','x',' ') &&
657 /* Allocate the memory needed to store the decoder's structure */
658 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
660 msg_Err( p_enc, "out of memory" );
663 p_enc->p_sys = p_sys;
664 p_enc->pf_encode_audio = Encode;
665 p_enc->fmt_in.i_codec = AOUT_FMT_S16_NE;
666 p_enc->fmt_out.i_codec = VLC_FOURCC('s','p','x',' ');
668 speex_init_header( &p_sys->header, p_enc->fmt_in.audio.i_rate,
671 p_sys->header.frames_per_packet = 1;
672 p_sys->header.vbr = 1;
673 p_sys->header.nb_channels = p_enc->fmt_in.audio.i_channels;
675 /* Create a new encoder state in narrowband mode */
676 p_sys->p_state = speex_encoder_init( p_speex_mode );
678 /* Set the quality to 8 (15 kbps) */
680 speex_encoder_ctl( p_sys->p_state, SPEEX_SET_QUALITY, &i_quality );
682 /*Initialization of the structure that holds the bits*/
683 speex_bits_init( &p_sys->bits );
685 p_sys->i_frames_in_packet = 0;
686 p_sys->i_samples_delay = 0;
689 speex_encoder_ctl( p_sys->p_state, SPEEX_GET_FRAME_SIZE,
690 &p_sys->i_frame_length );
692 p_sys->i_frame_size = p_sys->i_frame_length *
693 sizeof(int16_t) * p_enc->fmt_in.audio.i_channels;
694 p_sys->p_buffer = malloc( p_sys->i_frame_size );
696 /* Create and store headers */
697 pp_header[0] = speex_header_to_packet( &p_sys->header, &pi_header[0] );
698 pp_header[1] = "ENCODER=VLC media player";
699 pi_header[1] = sizeof("ENCODER=VLC media player");
701 p_enc->fmt_out.i_extra = 3 * 2 + pi_header[0] + pi_header[1];
702 p_extra = p_enc->fmt_out.p_extra = malloc( p_enc->fmt_out.i_extra );
703 for( i = 0; i < 2; i++ )
705 *(p_extra++) = pi_header[i] >> 8;
706 *(p_extra++) = pi_header[i] & 0xFF;
707 memcpy( p_extra, pp_header[i], pi_header[i] );
708 p_extra += pi_header[i];
711 msg_Dbg( p_enc, "encoding: frame size:%d, channels:%d, samplerate:%d",
712 p_sys->i_frame_size, p_enc->fmt_in.audio.i_channels,
713 p_enc->fmt_in.audio.i_rate );
718 /****************************************************************************
719 * Encode: the whole thing
720 ****************************************************************************
721 * This function spits out ogg packets.
722 ****************************************************************************/
723 static block_t *Encode( encoder_t *p_enc, aout_buffer_t *p_aout_buf )
725 encoder_sys_t *p_sys = p_enc->p_sys;
726 block_t *p_block, *p_chain = NULL;
728 unsigned char *p_buffer = p_aout_buf->p_buffer;
729 int i_samples = p_aout_buf->i_nb_samples;
730 int i_samples_delay = p_sys->i_samples_delay;
732 p_sys->i_pts = p_aout_buf->start_date -
733 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
734 (mtime_t)p_enc->fmt_in.audio.i_rate;
736 p_sys->i_samples_delay += i_samples;
738 while( p_sys->i_samples_delay >= p_sys->i_frame_length )
743 if( i_samples_delay )
745 /* Take care of the left-over from last time */
746 int i_delay_size = i_samples_delay * 2 *
747 p_enc->fmt_in.audio.i_channels;
748 int i_size = p_sys->i_frame_size - i_delay_size;
750 p_samples = (int16_t *)p_sys->p_buffer;
751 memcpy( p_sys->p_buffer + i_delay_size, p_buffer, i_size );
752 p_buffer -= i_delay_size;
753 i_samples += i_samples_delay;
758 p_samples = (int16_t *)p_buffer;
761 /* Encode current frame */
762 if( p_enc->fmt_in.audio.i_channels == 2 )
763 speex_encode_stereo_int( p_samples, p_sys->i_frame_length,
767 if( p_sys->preprocess )
768 speex_preprocess( p_sys->preprocess, p_samples, NULL );
771 speex_encode_int( p_sys->p_state, p_samples, &p_sys->bits );
773 p_buffer += p_sys->i_frame_size;
774 p_sys->i_samples_delay -= p_sys->i_frame_length;
775 i_samples -= p_sys->i_frame_length;
777 p_sys->i_frames_in_packet++;
779 if( p_sys->i_frames_in_packet < p_sys->header.frames_per_packet )
782 p_sys->i_frames_in_packet = 0;
784 speex_bits_insert_terminator( &p_sys->bits );
785 i_out = speex_bits_write( &p_sys->bits, p_sys->p_buffer_out,
787 speex_bits_reset( &p_sys->bits );
789 p_block = block_New( p_enc, i_out );
790 memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
792 p_block->i_length = (mtime_t)1000000 *
793 (mtime_t)p_sys->i_frame_length * p_sys->header.frames_per_packet /
794 (mtime_t)p_enc->fmt_in.audio.i_rate;
796 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
799 p_sys->i_pts += p_block->i_length;
800 block_ChainAppend( &p_chain, p_block );
804 /* Backup the remaining raw samples */
807 memcpy( p_sys->p_buffer + i_samples_delay * 2 *
808 p_enc->fmt_in.audio.i_channels, p_buffer,
809 i_samples * 2 * p_enc->fmt_in.audio.i_channels );
815 /*****************************************************************************
816 * CloseEncoder: encoder destruction
817 *****************************************************************************/
818 static void CloseEncoder( vlc_object_t *p_this )
820 encoder_t *p_enc = (encoder_t *)p_this;
821 encoder_sys_t *p_sys = p_enc->p_sys;
823 speex_encoder_destroy( p_sys->p_state );
824 speex_bits_destroy( &p_sys->bits );
826 if( p_sys->p_buffer ) free( p_sys->p_buffer );