1 /*****************************************************************************
2 * flac.c: flac decoder/encoder module making use of libflac
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VLC authors and VideoLAN
7 * Authors: Gildas Bazin <gbazin@videolan.org>
8 * Sigmund Augdal Helberg <dnumgis@videolan.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
29 /* workaround libflac overriding assert.h system header */
30 #define assert(x) do {} while(0)
36 #include <vlc_common.h>
37 #include <vlc_plugin.h>
38 #include <vlc_codec.h>
40 #include <stream_decoder.h>
41 #include <stream_encoder.h>
43 #include <vlc_block_helper.h>
46 #if defined(FLAC_API_VERSION_CURRENT) && FLAC_API_VERSION_CURRENT >= 8
47 # define USE_NEW_FLAC_API
50 /*****************************************************************************
51 * decoder_sys_t : FLAC decoder descriptor
52 *****************************************************************************/
56 * Input/Output properties
59 block_t *p_aout_buffer;
65 FLAC__StreamDecoder *p_flac;
66 FLAC__StreamMetadata_StreamInfo stream_info;
70 static const int pi_channels_maps[9] =
74 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
75 AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
76 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
77 | AOUT_CHAN_REARRIGHT,
78 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
79 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
80 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
81 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE,
82 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
83 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT
84 | AOUT_CHAN_MIDDLERIGHT,
85 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT
86 | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
90 /*****************************************************************************
92 *****************************************************************************/
93 static int OpenDecoder ( vlc_object_t * );
94 static void CloseDecoder ( vlc_object_t * );
97 static int OpenEncoder ( vlc_object_t * );
98 static void CloseEncoder ( vlc_object_t * );
101 static block_t *DecodeBlock( decoder_t *, block_t ** );
103 /*****************************************************************************
105 *****************************************************************************/
108 set_category( CAT_INPUT )
109 set_subcategory( SUBCAT_INPUT_ACODEC )
110 add_shortcut( "flac" )
112 set_description( N_("Flac audio decoder") )
113 set_capability( "decoder", 100 )
114 set_callbacks( OpenDecoder, CloseDecoder )
118 add_shortcut( "flac" )
119 set_description( N_("Flac audio encoder") )
120 set_capability( "encoder", 100 )
121 set_callbacks( OpenEncoder, CloseEncoder )
126 /*****************************************************************************
127 * Interleave: helper function to interleave channels
128 *****************************************************************************/
129 static void Interleave( int32_t *p_out, const int32_t * const *pp_in,
130 const unsigned char *restrict pi_index, unsigned i_nb_channels,
131 unsigned i_samples, unsigned bits )
133 unsigned shift = 32 - bits;
135 for( unsigned j = 0; j < i_samples; j++ )
136 for( unsigned i = 0; i < i_nb_channels; i++ )
137 p_out[j * i_nb_channels + i] = pp_in[pi_index[i]][j] << shift;
140 /*****************************************************************************
141 * DecoderWriteCallback: called by libflac to output decoded samples
142 *****************************************************************************/
143 static FLAC__StreamDecoderWriteStatus
144 DecoderWriteCallback( const FLAC__StreamDecoder *decoder,
145 const FLAC__Frame *frame,
146 const FLAC__int32 *const buffer[], void *client_data )
148 /* XXX it supposes our internal format is WG4 */
149 static const unsigned char ppi_reorder[1+8][8] = {
156 { 0, 1, 4, 5, 2, 3 },
158 { 0, 1, 6, 4, 5, 2, 3 }, /* 7.0 Unspecified by flac, but following SMPTE */
159 { 0, 1, 6, 7, 4, 5, 2, 3 }, /* 7.1 Unspecified by flac, but following SMPTE */
163 decoder_t *p_dec = (decoder_t *)client_data;
164 decoder_sys_t *p_sys = p_dec->p_sys;
166 if( p_dec->fmt_out.audio.i_channels <= 0 ||
167 p_dec->fmt_out.audio.i_channels > 8 )
168 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
169 if( date_Get( &p_sys->end_date ) <= VLC_TS_INVALID )
170 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
172 const unsigned char *pi_reorder = ppi_reorder[p_dec->fmt_out.audio.i_channels];
174 p_sys->p_aout_buffer =
175 decoder_NewAudioBuffer( p_dec, frame->header.blocksize );
177 if( p_sys->p_aout_buffer == NULL )
178 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
180 Interleave( (int32_t *)p_sys->p_aout_buffer->p_buffer, buffer, pi_reorder,
181 frame->header.channels, frame->header.blocksize,
182 frame->header.bits_per_sample );
184 /* Date management (already done by packetizer) */
185 p_sys->p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
186 p_sys->p_aout_buffer->i_length =
187 date_Increment( &p_sys->end_date, frame->header.blocksize ) -
188 p_sys->p_aout_buffer->i_pts;
190 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
193 /*****************************************************************************
194 * DecoderReadCallback: called by libflac when it needs more data
195 *****************************************************************************/
196 static FLAC__StreamDecoderReadStatus
197 DecoderReadCallback( const FLAC__StreamDecoder *decoder, FLAC__byte buffer[],
198 size_t *bytes, void *client_data )
201 decoder_t *p_dec = (decoder_t *)client_data;
202 decoder_sys_t *p_sys = p_dec->p_sys;
204 if( p_sys->p_block && p_sys->p_block->i_buffer )
206 *bytes = __MIN(*bytes, p_sys->p_block->i_buffer);
207 memcpy( buffer, p_sys->p_block->p_buffer, *bytes );
208 p_sys->p_block->i_buffer -= *bytes;
209 p_sys->p_block->p_buffer += *bytes;
214 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
217 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
220 /*****************************************************************************
221 * DecoderMetadataCallback: called by libflac to when it encounters metadata
222 *****************************************************************************/
223 static void DecoderMetadataCallback( const FLAC__StreamDecoder *decoder,
224 const FLAC__StreamMetadata *metadata,
228 decoder_t *p_dec = (decoder_t *)client_data;
229 decoder_sys_t *p_sys = p_dec->p_sys;
231 /* Setup the format */
232 p_dec->fmt_out.audio.i_rate = metadata->data.stream_info.sample_rate;
233 p_dec->fmt_out.audio.i_channels = metadata->data.stream_info.channels;
234 p_dec->fmt_out.audio.i_physical_channels =
235 p_dec->fmt_out.audio.i_original_channels =
236 pi_channels_maps[metadata->data.stream_info.channels];
237 p_dec->fmt_out.audio.i_bitspersample =
238 metadata->data.stream_info.bits_per_sample;
240 msg_Dbg( p_dec, "channels:%d samplerate:%d bitspersamples:%d",
241 p_dec->fmt_out.audio.i_channels, p_dec->fmt_out.audio.i_rate,
242 p_dec->fmt_out.audio.i_bitspersample );
244 p_sys->b_stream_info = true;
245 p_sys->stream_info = metadata->data.stream_info;
247 date_Init( &p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1 );
248 date_Set( &p_sys->end_date, VLC_TS_INVALID );
251 /*****************************************************************************
252 * DecoderErrorCallback: called when the libflac decoder encounters an error
253 *****************************************************************************/
254 static void DecoderErrorCallback( const FLAC__StreamDecoder *decoder,
255 FLAC__StreamDecoderErrorStatus status,
259 decoder_t *p_dec = (decoder_t *)client_data;
263 case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
264 msg_Warn( p_dec, "an error in the stream caused the decoder to "
265 "lose synchronization." );
267 case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
268 msg_Err( p_dec, "the decoder encountered a corrupted frame header." );
270 case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
271 msg_Err( p_dec, "frame's data did not match the CRC in the "
275 msg_Err( p_dec, "got decoder error: %d", status );
278 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
281 /*****************************************************************************
282 * OpenDecoder: probe the decoder and return score
283 *****************************************************************************/
284 static int OpenDecoder( vlc_object_t *p_this )
286 decoder_t *p_dec = (decoder_t*)p_this;
287 decoder_sys_t *p_sys;
289 if( p_dec->fmt_in.i_codec != VLC_CODEC_FLAC )
294 /* Allocate the memory needed to store the decoder's structure */
295 if( ( p_dec->p_sys = p_sys = malloc(sizeof(*p_sys)) ) == NULL )
299 p_sys->b_stream_info = false;
300 p_sys->p_block = NULL;
302 /* Take care of flac init */
303 if( !(p_sys->p_flac = FLAC__stream_decoder_new()) )
305 msg_Err( p_dec, "FLAC__stream_decoder_new() failed" );
310 #ifdef USE_NEW_FLAC_API
311 if( FLAC__stream_decoder_init_stream( p_sys->p_flac,
317 DecoderWriteCallback,
318 DecoderMetadataCallback,
319 DecoderErrorCallback,
321 != FLAC__STREAM_DECODER_INIT_STATUS_OK )
323 msg_Err( p_dec, "FLAC__stream_decoder_init_stream() failed" );
324 FLAC__stream_decoder_delete( p_sys->p_flac );
329 FLAC__stream_decoder_set_read_callback( p_sys->p_flac,
330 DecoderReadCallback );
331 FLAC__stream_decoder_set_write_callback( p_sys->p_flac,
332 DecoderWriteCallback );
333 FLAC__stream_decoder_set_metadata_callback( p_sys->p_flac,
334 DecoderMetadataCallback );
335 FLAC__stream_decoder_set_error_callback( p_sys->p_flac,
336 DecoderErrorCallback );
337 FLAC__stream_decoder_set_client_data( p_sys->p_flac, p_dec );
339 FLAC__stream_decoder_init( p_sys->p_flac );
342 /* Set output properties */
343 p_dec->fmt_out.i_cat = AUDIO_ES;
344 p_dec->fmt_out.i_codec = VLC_CODEC_S32N;
347 p_dec->pf_decode_audio = DecodeBlock;
350 p_dec->b_need_packetized = true;
355 /*****************************************************************************
356 * CloseDecoder: flac decoder destruction
357 *****************************************************************************/
358 static void CloseDecoder( vlc_object_t *p_this )
360 decoder_t *p_dec = (decoder_t *)p_this;
361 decoder_sys_t *p_sys = p_dec->p_sys;
363 FLAC__stream_decoder_finish( p_sys->p_flac );
364 FLAC__stream_decoder_delete( p_sys->p_flac );
367 block_Release( p_sys->p_block );
371 /*****************************************************************************
372 * ProcessHeader: process Flac header.
373 *****************************************************************************/
374 static void ProcessHeader( decoder_t *p_dec )
376 decoder_sys_t *p_sys = p_dec->p_sys;
378 if( !p_dec->fmt_in.i_extra )
381 /* Decode STREAMINFO */
382 msg_Dbg( p_dec, "decode STREAMINFO" );
383 p_sys->p_block = block_Alloc( p_dec->fmt_in.i_extra );
384 memcpy( p_sys->p_block->p_buffer, p_dec->fmt_in.p_extra,
385 p_dec->fmt_in.i_extra );
386 FLAC__stream_decoder_process_until_end_of_metadata( p_sys->p_flac );
387 msg_Dbg( p_dec, "STREAMINFO decoded" );
390 /*****************************************************************************
391 * decoder_state_error: print meaningful error messages
392 *****************************************************************************/
393 static void decoder_state_error( decoder_t *p_dec,
394 FLAC__StreamDecoderState state )
398 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
399 msg_Dbg( p_dec, "the decoder is ready to search for metadata." );
401 case FLAC__STREAM_DECODER_READ_METADATA:
402 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
403 "reading metadata." );
405 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
406 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
407 "searching for the frame sync code." );
409 case FLAC__STREAM_DECODER_READ_FRAME:
410 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
411 "reading a frame." );
413 case FLAC__STREAM_DECODER_END_OF_STREAM:
414 msg_Dbg( p_dec, "the decoder has reached the end of the stream." );
416 #ifdef USE_NEW_FLAC_API
417 case FLAC__STREAM_DECODER_OGG_ERROR:
418 msg_Err( p_dec, "error occurred in the Ogg layer." );
420 case FLAC__STREAM_DECODER_SEEK_ERROR:
421 msg_Err( p_dec, "error occurred while seeking." );
424 case FLAC__STREAM_DECODER_ABORTED:
425 msg_Warn( p_dec, "the decoder was aborted by the read callback." );
427 #ifndef USE_NEW_FLAC_API
428 case FLAC__STREAM_DECODER_UNPARSEABLE_STREAM:
429 msg_Warn( p_dec, "the decoder encountered reserved fields in use "
433 case FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
434 msg_Err( p_dec, "error when allocating memory." );
436 #ifndef USE_NEW_FLAC_API
437 case FLAC__STREAM_DECODER_ALREADY_INITIALIZED:
438 msg_Err( p_dec, "FLAC__stream_decoder_init() was called when the "
439 "decoder was already initialized, usually because "
440 "FLAC__stream_decoder_finish() was not called." );
442 case FLAC__STREAM_DECODER_INVALID_CALLBACK:
443 msg_Err( p_dec, "FLAC__stream_decoder_init() was called without "
444 "all callbacks being set." );
447 case FLAC__STREAM_DECODER_UNINITIALIZED:
448 msg_Err( p_dec, "decoder in uninitialized state." );
451 msg_Warn(p_dec, "unknown error" );
455 /****************************************************************************
456 * DecodeBlock: the whole thing
457 ****************************************************************************/
458 static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
460 decoder_sys_t *p_sys = p_dec->p_sys;
462 if( !pp_block || !*pp_block )
464 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
466 block_Release( *pp_block );
470 if( !p_sys->b_stream_info )
471 ProcessHeader( p_dec );
473 p_sys->p_block = *pp_block;
476 if( p_sys->p_block->i_pts > VLC_TS_INVALID &&
477 p_sys->p_block->i_pts != date_Get( &p_sys->end_date ) )
478 date_Set( &p_sys->end_date, p_sys->p_block->i_pts );
480 p_sys->p_aout_buffer = 0;
482 if( !FLAC__stream_decoder_process_single( p_sys->p_flac ) )
484 decoder_state_error( p_dec,
485 FLAC__stream_decoder_get_state( p_sys->p_flac ) );
486 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
489 /* If the decoder is in the "aborted" state,
490 * FLAC__stream_decoder_process_single() won't return an error. */
491 if( FLAC__stream_decoder_get_state(p_dec->p_sys->p_flac)
492 == FLAC__STREAM_DECODER_ABORTED )
494 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
497 block_Release( p_sys->p_block );
498 p_sys->p_block = NULL;
500 return p_sys->p_aout_buffer;
505 /*****************************************************************************
506 * encoder_sys_t : flac encoder descriptor
507 *****************************************************************************/
517 FLAC__int32 *p_buffer;
518 unsigned int i_buffer;
525 FLAC__StreamEncoder *p_flac;
526 FLAC__StreamMetadata_StreamInfo stream_info;
534 #define STREAMINFO_SIZE 38
536 static block_t *Encode( encoder_t *, block_t * );
538 /*****************************************************************************
539 * EncoderWriteCallback: called by libflac to output encoded samples
540 *****************************************************************************/
541 static FLAC__StreamEncoderWriteStatus
542 EncoderWriteCallback( const FLAC__StreamEncoder *encoder,
543 const FLAC__byte buffer[],
544 size_t bytes, unsigned samples,
545 unsigned current_frame, void *client_data )
547 VLC_UNUSED(encoder); VLC_UNUSED(current_frame);
548 encoder_t *p_enc = (encoder_t *)client_data;
549 encoder_sys_t *p_sys = p_enc->p_sys;
554 if( p_sys->i_headers == 1 )
556 msg_Dbg( p_enc, "Writing STREAMINFO: %zu", bytes );
558 /* Backup the STREAMINFO metadata block */
559 p_enc->fmt_out.i_extra = STREAMINFO_SIZE + 4;
560 p_enc->fmt_out.p_extra = xmalloc( STREAMINFO_SIZE + 4 );
561 memcpy( p_enc->fmt_out.p_extra, "fLaC", 4 );
562 memcpy( ((uint8_t *)p_enc->fmt_out.p_extra) + 4, buffer,
565 /* Fake this as the last metadata block */
566 ((uint8_t*)p_enc->fmt_out.p_extra)[4] |= 0x80;
569 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
572 p_block = block_Alloc( bytes );
573 memcpy( p_block->p_buffer, buffer, bytes );
575 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
577 p_sys->i_samples_delay -= samples;
579 p_block->i_length = (mtime_t)1000000 *
580 (mtime_t)samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
583 p_sys->i_pts += p_block->i_length;
585 block_ChainAppend( &p_sys->p_chain, p_block );
587 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
589 /*****************************************************************************
590 * EncoderMetadataCallback: called by libflac to output metadata
591 *****************************************************************************/
592 static void EncoderMetadataCallback( const FLAC__StreamEncoder *encoder,
593 const FLAC__StreamMetadata *metadata,
597 encoder_t *p_enc = (encoder_t *)client_data;
599 msg_Err( p_enc, "MetadataCallback: %i", metadata->type );
603 /*****************************************************************************
604 * OpenEncoder: probe the encoder and return score
605 *****************************************************************************/
606 static int OpenEncoder( vlc_object_t *p_this )
608 encoder_t *p_enc = (encoder_t *)p_this;
609 encoder_sys_t *p_sys;
611 if( p_enc->fmt_out.i_codec != VLC_CODEC_FLAC &&
617 /* Allocate the memory needed to store the decoder's structure */
618 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
620 p_enc->p_sys = p_sys;
621 p_enc->pf_encode_audio = Encode;
622 p_enc->fmt_out.i_codec = VLC_CODEC_FLAC;
624 p_sys->i_headers = 0;
627 p_sys->i_samples_delay = 0;
629 /* Create flac encoder */
630 if( !(p_sys->p_flac = FLAC__stream_encoder_new()) )
632 msg_Err( p_enc, "FLAC__stream_encoder_new() failed" );
637 FLAC__stream_encoder_set_streamable_subset( p_sys->p_flac, 1 );
638 FLAC__stream_encoder_set_channels( p_sys->p_flac,
639 p_enc->fmt_in.audio.i_channels );
640 FLAC__stream_encoder_set_sample_rate( p_sys->p_flac,
641 p_enc->fmt_in.audio.i_rate );
642 FLAC__stream_encoder_set_bits_per_sample( p_sys->p_flac, 16 );
643 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
645 /* Get and store the STREAMINFO metadata block as a p_extra */
648 #ifdef USE_NEW_FLAC_API
649 if( FLAC__stream_encoder_init_stream( p_sys->p_flac,
650 EncoderWriteCallback,
653 EncoderMetadataCallback,
655 != FLAC__STREAM_ENCODER_INIT_STATUS_OK )
657 msg_Err( p_enc, "FLAC__stream_encoder_init_stream() failed" );
658 FLAC__stream_encoder_delete( p_sys->p_flac );
663 FLAC__stream_encoder_set_write_callback( p_sys->p_flac,
664 EncoderWriteCallback );
665 FLAC__stream_encoder_set_metadata_callback( p_sys->p_flac,
666 EncoderMetadataCallback );
667 FLAC__stream_encoder_set_client_data( p_sys->p_flac, p_enc );
669 FLAC__stream_encoder_init( p_sys->p_flac );
675 /****************************************************************************
676 * Encode: the whole thing
677 ****************************************************************************
678 * This function spits out ogg packets.
679 ****************************************************************************/
680 static block_t *Encode( encoder_t *p_enc, block_t *p_aout_buf )
682 encoder_sys_t *p_sys = p_enc->p_sys;
686 /* FIXME: p_aout_buf is NULL when it's time to flush*/
687 if( unlikely( !p_aout_buf ) ) return NULL;
689 p_sys->i_pts = p_aout_buf->i_pts -
690 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
691 (mtime_t)p_enc->fmt_in.audio.i_rate;
693 p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
695 /* Convert samples to FLAC__int32 */
696 if( p_sys->i_buffer < p_aout_buf->i_buffer * 2 )
699 xrealloc( p_sys->p_buffer, p_aout_buf->i_buffer * 2 );
700 p_sys->i_buffer = p_aout_buf->i_buffer * 2;
703 for( i = 0 ; i < p_aout_buf->i_buffer / 2 ; i++ )
705 p_sys->p_buffer[i]= ((int16_t *)p_aout_buf->p_buffer)[i];
708 FLAC__stream_encoder_process_interleaved( p_sys->p_flac, p_sys->p_buffer,
709 p_aout_buf->i_nb_samples );
711 p_chain = p_sys->p_chain;
717 /*****************************************************************************
718 * CloseEncoder: encoder destruction
719 *****************************************************************************/
720 static void CloseEncoder( vlc_object_t *p_this )
722 encoder_t *p_enc = (encoder_t *)p_this;
723 encoder_sys_t *p_sys = p_enc->p_sys;
725 FLAC__stream_encoder_delete( p_sys->p_flac );
727 free( p_sys->p_buffer );