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 <FLAC/stream_decoder.h>
41 #include <FLAC/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_REARCENTER | AOUT_CHAN_MIDDLELEFT| 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++ )
138 union { int32_t i; uint32_t u; } spl;
140 spl.u = ((uint32_t)pp_in[pi_index[i]][j]) << shift;
141 p_out[j * i_nb_channels + i] = spl.i;
145 /*****************************************************************************
146 * DecoderWriteCallback: called by libflac to output decoded samples
147 *****************************************************************************/
148 static FLAC__StreamDecoderWriteStatus
149 DecoderWriteCallback( const FLAC__StreamDecoder *decoder,
150 const FLAC__Frame *frame,
151 const FLAC__int32 *const buffer[], void *client_data )
153 /* XXX it supposes our internal format is WG4 */
154 static const unsigned char ppi_reorder[1+8][8] = {
161 { 0, 1, 4, 5, 2, 3 },
162 { 0, 1, 5, 6, 4, 2, 3 },
163 { 0, 1, 6, 7, 4, 5, 2, 3 },
167 decoder_t *p_dec = (decoder_t *)client_data;
168 decoder_sys_t *p_sys = p_dec->p_sys;
170 if( p_dec->fmt_out.audio.i_channels <= 0 ||
171 p_dec->fmt_out.audio.i_channels > 8 )
172 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
173 if( date_Get( &p_sys->end_date ) <= VLC_TS_INVALID )
174 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
176 const unsigned char *pi_reorder = ppi_reorder[p_dec->fmt_out.audio.i_channels];
178 p_sys->p_aout_buffer =
179 decoder_NewAudioBuffer( p_dec, frame->header.blocksize );
181 if( p_sys->p_aout_buffer == NULL )
182 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
184 Interleave( (int32_t *)p_sys->p_aout_buffer->p_buffer, buffer, pi_reorder,
185 frame->header.channels, frame->header.blocksize,
186 frame->header.bits_per_sample );
188 /* Date management (already done by packetizer) */
189 p_sys->p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
190 p_sys->p_aout_buffer->i_length =
191 date_Increment( &p_sys->end_date, frame->header.blocksize ) -
192 p_sys->p_aout_buffer->i_pts;
194 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
197 /*****************************************************************************
198 * DecoderReadCallback: called by libflac when it needs more data
199 *****************************************************************************/
200 static FLAC__StreamDecoderReadStatus
201 DecoderReadCallback( const FLAC__StreamDecoder *decoder, FLAC__byte buffer[],
202 size_t *bytes, void *client_data )
205 decoder_t *p_dec = (decoder_t *)client_data;
206 decoder_sys_t *p_sys = p_dec->p_sys;
208 if( p_sys->p_block && p_sys->p_block->i_buffer )
210 *bytes = __MIN(*bytes, p_sys->p_block->i_buffer);
211 memcpy( buffer, p_sys->p_block->p_buffer, *bytes );
212 p_sys->p_block->i_buffer -= *bytes;
213 p_sys->p_block->p_buffer += *bytes;
218 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
221 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
224 /*****************************************************************************
225 * DecoderMetadataCallback: called by libflac to when it encounters metadata
226 *****************************************************************************/
227 static void DecoderMetadataCallback( const FLAC__StreamDecoder *decoder,
228 const FLAC__StreamMetadata *metadata,
232 decoder_t *p_dec = (decoder_t *)client_data;
233 decoder_sys_t *p_sys = p_dec->p_sys;
235 /* Setup the format */
236 p_dec->fmt_out.audio.i_rate = metadata->data.stream_info.sample_rate;
237 p_dec->fmt_out.audio.i_channels = metadata->data.stream_info.channels;
238 p_dec->fmt_out.audio.i_physical_channels =
239 p_dec->fmt_out.audio.i_original_channels =
240 pi_channels_maps[metadata->data.stream_info.channels];
241 if (!p_dec->fmt_out.audio.i_bitspersample)
242 p_dec->fmt_out.audio.i_bitspersample =
243 metadata->data.stream_info.bits_per_sample;
245 msg_Dbg( p_dec, "channels:%d samplerate:%d bitspersamples:%d",
246 p_dec->fmt_out.audio.i_channels, p_dec->fmt_out.audio.i_rate,
247 p_dec->fmt_out.audio.i_bitspersample );
249 p_sys->b_stream_info = true;
250 p_sys->stream_info = metadata->data.stream_info;
252 date_Init( &p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1 );
253 date_Set( &p_sys->end_date, VLC_TS_INVALID );
256 /*****************************************************************************
257 * DecoderErrorCallback: called when the libflac decoder encounters an error
258 *****************************************************************************/
259 static void DecoderErrorCallback( const FLAC__StreamDecoder *decoder,
260 FLAC__StreamDecoderErrorStatus status,
264 decoder_t *p_dec = (decoder_t *)client_data;
268 case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
269 msg_Warn( p_dec, "an error in the stream caused the decoder to "
270 "lose synchronization." );
272 case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
273 msg_Err( p_dec, "the decoder encountered a corrupted frame header." );
275 case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
276 msg_Err( p_dec, "frame's data did not match the CRC in the "
279 case FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM:
280 msg_Err( p_dec, "The decoder encountered reserved fields in use in "
284 msg_Err( p_dec, "got decoder error: %d", status );
287 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
290 /*****************************************************************************
291 * OpenDecoder: probe the decoder and return score
292 *****************************************************************************/
293 static int OpenDecoder( vlc_object_t *p_this )
295 decoder_t *p_dec = (decoder_t*)p_this;
296 decoder_sys_t *p_sys;
298 if( p_dec->fmt_in.i_codec != VLC_CODEC_FLAC )
303 /* Allocate the memory needed to store the decoder's structure */
304 if( ( p_dec->p_sys = p_sys = malloc(sizeof(*p_sys)) ) == NULL )
308 p_sys->b_stream_info = false;
309 p_sys->p_block = NULL;
311 /* Take care of flac init */
312 if( !(p_sys->p_flac = FLAC__stream_decoder_new()) )
314 msg_Err( p_dec, "FLAC__stream_decoder_new() failed" );
319 #ifdef USE_NEW_FLAC_API
320 if( FLAC__stream_decoder_init_stream( p_sys->p_flac,
326 DecoderWriteCallback,
327 DecoderMetadataCallback,
328 DecoderErrorCallback,
330 != FLAC__STREAM_DECODER_INIT_STATUS_OK )
332 msg_Err( p_dec, "FLAC__stream_decoder_init_stream() failed" );
333 FLAC__stream_decoder_delete( p_sys->p_flac );
338 FLAC__stream_decoder_set_read_callback( p_sys->p_flac,
339 DecoderReadCallback );
340 FLAC__stream_decoder_set_write_callback( p_sys->p_flac,
341 DecoderWriteCallback );
342 FLAC__stream_decoder_set_metadata_callback( p_sys->p_flac,
343 DecoderMetadataCallback );
344 FLAC__stream_decoder_set_error_callback( p_sys->p_flac,
345 DecoderErrorCallback );
346 FLAC__stream_decoder_set_client_data( p_sys->p_flac, p_dec );
348 FLAC__stream_decoder_init( p_sys->p_flac );
351 /* Set output properties */
352 p_dec->fmt_out.i_cat = AUDIO_ES;
353 p_dec->fmt_out.i_codec = VLC_CODEC_S32N;
356 p_dec->pf_decode_audio = DecodeBlock;
359 p_dec->b_need_packetized = true;
364 /*****************************************************************************
365 * CloseDecoder: flac decoder destruction
366 *****************************************************************************/
367 static void CloseDecoder( vlc_object_t *p_this )
369 decoder_t *p_dec = (decoder_t *)p_this;
370 decoder_sys_t *p_sys = p_dec->p_sys;
372 FLAC__stream_decoder_finish( p_sys->p_flac );
373 FLAC__stream_decoder_delete( p_sys->p_flac );
376 block_Release( p_sys->p_block );
380 /*****************************************************************************
381 * ProcessHeader: process Flac header.
382 *****************************************************************************/
383 static void ProcessHeader( decoder_t *p_dec )
385 decoder_sys_t *p_sys = p_dec->p_sys;
387 if( !p_dec->fmt_in.i_extra )
390 /* Decode STREAMINFO */
391 msg_Dbg( p_dec, "decode STREAMINFO" );
392 size_t i_extra = p_dec->fmt_in.i_extra;
393 static const char header[4] = { 'f', 'L', 'a', 'C' };
395 if (i_extra > 42 && !memcmp(p_dec->fmt_in.p_extra, header, 4))
397 else if (i_extra > 34 && memcmp(p_dec->fmt_in.p_extra, header, 4))
402 p_sys->p_block = block_Alloc( 8 + i_extra );
403 if( p_sys->p_block == NULL ) return;
404 memcpy( p_sys->p_block->p_buffer + 8, p_dec->fmt_in.p_extra, i_extra );
405 memcpy( p_sys->p_block->p_buffer, header, 4);
406 uint8_t *p = p_sys->p_block->p_buffer;
407 p[4] = 0x80 | 0; /* STREAMINFO faked as last block */
410 p[7] = 34; /* block size */
413 p_sys->p_block = block_Alloc( i_extra );
414 if( p_sys->p_block == NULL ) return;
415 memcpy( p_sys->p_block->p_buffer, p_dec->fmt_in.p_extra, i_extra );
418 msg_Err(p_dec, "Invalid flac header size %zu", i_extra);
421 FLAC__stream_decoder_process_until_end_of_metadata( p_sys->p_flac );
422 msg_Dbg( p_dec, "STREAMINFO decoded" );
424 block_Release( p_sys->p_block );
425 p_sys->p_block = NULL;
428 /*****************************************************************************
429 * decoder_state_error: print meaningful error messages
430 *****************************************************************************/
431 static void decoder_state_error( decoder_t *p_dec,
432 FLAC__StreamDecoderState state )
436 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
437 msg_Dbg( p_dec, "the decoder is ready to search for metadata." );
439 case FLAC__STREAM_DECODER_READ_METADATA:
440 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
441 "reading metadata." );
443 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
444 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
445 "searching for the frame sync code." );
447 case FLAC__STREAM_DECODER_READ_FRAME:
448 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
449 "reading a frame." );
451 case FLAC__STREAM_DECODER_END_OF_STREAM:
452 msg_Dbg( p_dec, "the decoder has reached the end of the stream." );
454 #ifdef USE_NEW_FLAC_API
455 case FLAC__STREAM_DECODER_OGG_ERROR:
456 msg_Err( p_dec, "error occurred in the Ogg layer." );
458 case FLAC__STREAM_DECODER_SEEK_ERROR:
459 msg_Err( p_dec, "error occurred while seeking." );
462 case FLAC__STREAM_DECODER_ABORTED:
463 msg_Warn( p_dec, "the decoder was aborted by the read callback." );
465 #ifndef USE_NEW_FLAC_API
466 case FLAC__STREAM_DECODER_UNPARSEABLE_STREAM:
467 msg_Warn( p_dec, "the decoder encountered reserved fields in use "
471 case FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
472 msg_Err( p_dec, "error when allocating memory." );
474 #ifndef USE_NEW_FLAC_API
475 case FLAC__STREAM_DECODER_ALREADY_INITIALIZED:
476 msg_Err( p_dec, "FLAC__stream_decoder_init() was called when the "
477 "decoder was already initialized, usually because "
478 "FLAC__stream_decoder_finish() was not called." );
480 case FLAC__STREAM_DECODER_INVALID_CALLBACK:
481 msg_Err( p_dec, "FLAC__stream_decoder_init() was called without "
482 "all callbacks being set." );
485 case FLAC__STREAM_DECODER_UNINITIALIZED:
486 msg_Err( p_dec, "decoder in uninitialized state." );
489 msg_Warn(p_dec, "unknown error" );
493 /****************************************************************************
494 * DecodeBlock: the whole thing
495 ****************************************************************************/
496 static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
498 decoder_sys_t *p_sys = p_dec->p_sys;
500 if( !pp_block || !*pp_block )
502 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
504 block_Release( *pp_block );
508 if( !p_sys->b_stream_info )
509 ProcessHeader( p_dec );
511 p_sys->p_block = *pp_block;
514 if( p_sys->p_block->i_pts > VLC_TS_INVALID &&
515 p_sys->p_block->i_pts != date_Get( &p_sys->end_date ) )
516 date_Set( &p_sys->end_date, p_sys->p_block->i_pts );
518 p_sys->p_aout_buffer = 0;
520 if( !FLAC__stream_decoder_process_single( p_sys->p_flac ) )
522 decoder_state_error( p_dec,
523 FLAC__stream_decoder_get_state( p_sys->p_flac ) );
524 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
527 /* If the decoder is in the "aborted" state,
528 * FLAC__stream_decoder_process_single() won't return an error. */
529 switch ( FLAC__stream_decoder_get_state(p_dec->p_sys->p_flac) )
531 case FLAC__STREAM_DECODER_ABORTED:
532 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
534 case FLAC__STREAM_DECODER_END_OF_STREAM:
535 FLAC__stream_decoder_reset( p_dec->p_sys->p_flac );
541 block_Release( p_sys->p_block );
542 p_sys->p_block = NULL;
544 return p_sys->p_aout_buffer;
549 /*****************************************************************************
550 * encoder_sys_t : flac encoder descriptor
551 *****************************************************************************/
561 FLAC__int32 *p_buffer;
562 unsigned int i_buffer;
569 FLAC__StreamEncoder *p_flac;
570 FLAC__StreamMetadata_StreamInfo stream_info;
578 #define STREAMINFO_SIZE 34
580 static block_t *Encode( encoder_t *, block_t * );
582 /*****************************************************************************
583 * EncoderWriteCallback: called by libflac to output encoded samples
584 *****************************************************************************/
585 static FLAC__StreamEncoderWriteStatus
586 EncoderWriteCallback( const FLAC__StreamEncoder *encoder,
587 const FLAC__byte buffer[],
588 size_t bytes, unsigned samples,
589 unsigned current_frame, void *client_data )
591 VLC_UNUSED(encoder); VLC_UNUSED(current_frame);
592 encoder_t *p_enc = (encoder_t *)client_data;
593 encoder_sys_t *p_sys = p_enc->p_sys;
598 if( p_sys->i_headers == 1 )
600 msg_Dbg( p_enc, "Writing STREAMINFO: %zu", bytes );
602 /* Backup the STREAMINFO metadata block */
603 p_enc->fmt_out.i_extra = STREAMINFO_SIZE + 8;
604 p_enc->fmt_out.p_extra = xmalloc( STREAMINFO_SIZE + 8);
605 memcpy(p_enc->fmt_out.p_extra, "fLaC", 4);
606 memcpy((uint8_t*)p_enc->fmt_out.p_extra + 4, buffer, STREAMINFO_SIZE );
607 /* Fake this as the last metadata block */
608 ((uint8_t*)p_enc->fmt_out.p_extra)[4] |= 0x80;
611 return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
614 p_block = block_Alloc( bytes );
615 memcpy( p_block->p_buffer, buffer, bytes );
617 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
619 p_sys->i_samples_delay -= samples;
621 p_block->i_length = (mtime_t)1000000 *
622 (mtime_t)samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
625 p_sys->i_pts += p_block->i_length;
627 block_ChainAppend( &p_sys->p_chain, p_block );
629 return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
631 /*****************************************************************************
632 * EncoderMetadataCallback: called by libflac to output metadata
633 *****************************************************************************/
634 static void EncoderMetadataCallback( const FLAC__StreamEncoder *encoder,
635 const FLAC__StreamMetadata *metadata,
639 encoder_t *p_enc = (encoder_t *)client_data;
641 msg_Err( p_enc, "MetadataCallback: %i", metadata->type );
645 /*****************************************************************************
646 * OpenEncoder: probe the encoder and return score
647 *****************************************************************************/
648 static int OpenEncoder( vlc_object_t *p_this )
650 encoder_t *p_enc = (encoder_t *)p_this;
651 encoder_sys_t *p_sys;
653 if( p_enc->fmt_out.i_codec != VLC_CODEC_FLAC &&
659 /* Allocate the memory needed to store the decoder's structure */
660 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
662 p_enc->p_sys = p_sys;
663 p_enc->pf_encode_audio = Encode;
664 p_enc->fmt_out.i_codec = VLC_CODEC_FLAC;
666 p_sys->i_headers = 0;
669 p_sys->i_samples_delay = 0;
671 /* Create flac encoder */
672 if( !(p_sys->p_flac = FLAC__stream_encoder_new()) )
674 msg_Err( p_enc, "FLAC__stream_encoder_new() failed" );
679 FLAC__stream_encoder_set_streamable_subset( p_sys->p_flac, 1 );
680 FLAC__stream_encoder_set_channels( p_sys->p_flac,
681 p_enc->fmt_in.audio.i_channels );
682 FLAC__stream_encoder_set_sample_rate( p_sys->p_flac,
683 p_enc->fmt_in.audio.i_rate );
684 FLAC__stream_encoder_set_bits_per_sample( p_sys->p_flac, 16 );
685 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
687 /* Get and store the STREAMINFO metadata block as a p_extra */
690 #ifdef USE_NEW_FLAC_API
691 if( FLAC__stream_encoder_init_stream( p_sys->p_flac,
692 EncoderWriteCallback,
695 EncoderMetadataCallback,
697 != FLAC__STREAM_ENCODER_INIT_STATUS_OK )
699 msg_Err( p_enc, "FLAC__stream_encoder_init_stream() failed" );
700 FLAC__stream_encoder_delete( p_sys->p_flac );
705 FLAC__stream_encoder_set_write_callback( p_sys->p_flac,
706 EncoderWriteCallback );
707 FLAC__stream_encoder_set_metadata_callback( p_sys->p_flac,
708 EncoderMetadataCallback );
709 FLAC__stream_encoder_set_client_data( p_sys->p_flac, p_enc );
711 FLAC__stream_encoder_init( p_sys->p_flac );
717 /****************************************************************************
718 * Encode: the whole thing
719 ****************************************************************************
720 * This function spits out ogg packets.
721 ****************************************************************************/
722 static block_t *Encode( encoder_t *p_enc, block_t *p_aout_buf )
724 encoder_sys_t *p_sys = p_enc->p_sys;
728 /* FIXME: p_aout_buf is NULL when it's time to flush*/
729 if( unlikely( !p_aout_buf ) ) return NULL;
731 p_sys->i_pts = p_aout_buf->i_pts -
732 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
733 (mtime_t)p_enc->fmt_in.audio.i_rate;
735 p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
737 /* Convert samples to FLAC__int32 */
738 if( p_sys->i_buffer < p_aout_buf->i_buffer * sizeof(FLAC__int32) )
741 xrealloc( p_sys->p_buffer, p_aout_buf->i_buffer * sizeof(FLAC__int32) );
742 p_sys->i_buffer = p_aout_buf->i_buffer * 2;
745 for( i = 0 ; i < p_aout_buf->i_buffer / 2 ; i++ )
747 p_sys->p_buffer[i]= ((int16_t *)p_aout_buf->p_buffer)[i];
750 FLAC__stream_encoder_process_interleaved( p_sys->p_flac, p_sys->p_buffer,
751 p_aout_buf->i_nb_samples );
753 p_chain = p_sys->p_chain;
759 /*****************************************************************************
760 * CloseEncoder: encoder destruction
761 *****************************************************************************/
762 static void CloseEncoder( vlc_object_t *p_this )
764 encoder_t *p_enc = (encoder_t *)p_this;
765 encoder_sys_t *p_sys = p_enc->p_sys;
767 FLAC__stream_encoder_delete( p_sys->p_flac );
769 free( p_sys->p_buffer );