1 /*****************************************************************************
2 * flac.c: flac decoder/encoder module making use of libflac
3 *****************************************************************************
4 * Copyright (C) 1999-2001 the VideoLAN team
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
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 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 General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, 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 * );
96 static int OpenEncoder ( vlc_object_t * );
97 static void CloseEncoder ( vlc_object_t * );
99 static block_t *DecodeBlock( decoder_t *, block_t ** );
101 /*****************************************************************************
103 *****************************************************************************/
106 set_category( CAT_INPUT )
107 set_subcategory( SUBCAT_INPUT_ACODEC )
108 add_shortcut( "flac" )
110 set_description( N_("Flac audio decoder") )
111 set_capability( "decoder", 100 )
112 set_callbacks( OpenDecoder, CloseDecoder )
115 add_shortcut( "flac" )
116 set_description( N_("Flac audio encoder") )
117 set_capability( "encoder", 100 )
118 set_callbacks( OpenEncoder, CloseEncoder )
122 /*****************************************************************************
123 * Interleave: helper function to interleave channels
124 *****************************************************************************/
125 static void Interleave32( int32_t *p_out, const int32_t * const *pp_in,
126 const int pi_index[],
127 int i_nb_channels, int i_samples )
130 for ( j = 0; j < i_samples; j++ )
132 for ( i = 0; i < i_nb_channels; i++ )
134 p_out[j * i_nb_channels + i] = pp_in[pi_index[i]][j];
139 static void Interleave24( int8_t *p_out, const int32_t * const *pp_in,
140 const int pi_index[],
141 int i_nb_channels, int i_samples )
144 for ( j = 0; j < i_samples; j++ )
146 for ( i = 0; i < i_nb_channels; i++ )
148 const int i_index = pi_index[i];
149 #ifdef WORDS_BIGENDIAN
150 p_out[3*(j * i_nb_channels + i)+0] = (pp_in[i_index][j] >> 16) & 0xff;
151 p_out[3*(j * i_nb_channels + i)+1] = (pp_in[i_index][j] >> 8 ) & 0xff;
152 p_out[3*(j * i_nb_channels + i)+2] = (pp_in[i_index][j] >> 0 ) & 0xff;
154 p_out[3*(j * i_nb_channels + i)+2] = (pp_in[i_index][j] >> 16) & 0xff;
155 p_out[3*(j * i_nb_channels + i)+1] = (pp_in[i_index][j] >> 8 ) & 0xff;
156 p_out[3*(j * i_nb_channels + i)+0] = (pp_in[i_index][j] >> 0 ) & 0xff;
162 static void Interleave16( int16_t *p_out, const int32_t * const *pp_in,
163 const int pi_index[],
164 int i_nb_channels, int i_samples )
167 for ( j = 0; j < i_samples; j++ )
169 for ( i = 0; i < i_nb_channels; i++ )
171 p_out[j * i_nb_channels + i] = (int32_t)(pp_in[pi_index[i]][j]);
176 /*****************************************************************************
177 * DecoderWriteCallback: called by libflac to output decoded samples
178 *****************************************************************************/
179 static FLAC__StreamDecoderWriteStatus
180 DecoderWriteCallback( const FLAC__StreamDecoder *decoder,
181 const FLAC__Frame *frame,
182 const FLAC__int32 *const buffer[], void *client_data )
184 /* XXX it supposes our internal format is WG4 */
185 static const int ppi_reorder[1+8][8] = {
192 { 0, 1, 4, 5, 2, 3 },
194 { 0, 1, 6, 4, 5, 2, 3 }, /* 7.0 Unspecified by flac, but following SMPTE */
195 { 0, 1, 6, 7, 4, 5, 2, 3 }, /* 7.1 Unspecified by flac, but following SMPTE */
199 decoder_t *p_dec = (decoder_t *)client_data;
200 decoder_sys_t *p_sys = p_dec->p_sys;
202 if( p_dec->fmt_out.audio.i_channels <= 0 ||
203 p_dec->fmt_out.audio.i_channels > 8 )
204 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
205 if( date_Get( &p_sys->end_date ) <= VLC_TS_INVALID )
206 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
208 const int * const pi_reorder = ppi_reorder[p_dec->fmt_out.audio.i_channels];
210 p_sys->p_aout_buffer =
211 decoder_NewAudioBuffer( p_dec, frame->header.blocksize );
213 if( p_sys->p_aout_buffer == NULL )
214 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
216 switch( frame->header.bits_per_sample )
219 Interleave16( (int16_t *)p_sys->p_aout_buffer->p_buffer, buffer, pi_reorder,
220 frame->header.channels, frame->header.blocksize );
223 Interleave24( (int8_t *)p_sys->p_aout_buffer->p_buffer, buffer, pi_reorder,
224 frame->header.channels, frame->header.blocksize );
227 Interleave32( (int32_t *)p_sys->p_aout_buffer->p_buffer, buffer, pi_reorder,
228 frame->header.channels, frame->header.blocksize );
231 /* Date management (already done by packetizer) */
232 p_sys->p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
233 p_sys->p_aout_buffer->i_length =
234 date_Increment( &p_sys->end_date, frame->header.blocksize ) -
235 p_sys->p_aout_buffer->i_pts;
237 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
240 /*****************************************************************************
241 * DecoderReadCallback: called by libflac when it needs more data
242 *****************************************************************************/
243 static FLAC__StreamDecoderReadStatus
244 DecoderReadCallback( const FLAC__StreamDecoder *decoder, FLAC__byte buffer[],
245 size_t *bytes, void *client_data )
248 decoder_t *p_dec = (decoder_t *)client_data;
249 decoder_sys_t *p_sys = p_dec->p_sys;
251 if( p_sys->p_block && p_sys->p_block->i_buffer )
253 *bytes = __MIN(*bytes, p_sys->p_block->i_buffer);
254 memcpy( buffer, p_sys->p_block->p_buffer, *bytes );
255 p_sys->p_block->i_buffer -= *bytes;
256 p_sys->p_block->p_buffer += *bytes;
261 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
264 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
267 /*****************************************************************************
268 * DecoderMetadataCallback: called by libflac to when it encounters metadata
269 *****************************************************************************/
270 static void DecoderMetadataCallback( const FLAC__StreamDecoder *decoder,
271 const FLAC__StreamMetadata *metadata,
275 decoder_t *p_dec = (decoder_t *)client_data;
276 decoder_sys_t *p_sys = p_dec->p_sys;
278 if( p_dec->pf_decode_audio )
280 switch( metadata->data.stream_info.bits_per_sample )
283 p_dec->fmt_out.i_codec = VLC_CODEC_S8;
286 p_dec->fmt_out.i_codec = VLC_CODEC_S16N;
289 p_dec->fmt_out.i_codec = VLC_CODEC_S24N;
292 msg_Dbg( p_dec, "strange bit/sample value: %d",
293 metadata->data.stream_info.bits_per_sample );
294 p_dec->fmt_out.i_codec = VLC_CODEC_FI32;
299 /* Setup the format */
300 p_dec->fmt_out.audio.i_rate = metadata->data.stream_info.sample_rate;
301 p_dec->fmt_out.audio.i_channels = metadata->data.stream_info.channels;
302 p_dec->fmt_out.audio.i_physical_channels =
303 p_dec->fmt_out.audio.i_original_channels =
304 pi_channels_maps[metadata->data.stream_info.channels];
305 p_dec->fmt_out.audio.i_bitspersample =
306 metadata->data.stream_info.bits_per_sample;
308 msg_Dbg( p_dec, "channels:%d samplerate:%d bitspersamples:%d",
309 p_dec->fmt_out.audio.i_channels, p_dec->fmt_out.audio.i_rate,
310 p_dec->fmt_out.audio.i_bitspersample );
312 p_sys->b_stream_info = true;
313 p_sys->stream_info = metadata->data.stream_info;
315 date_Init( &p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1 );
316 date_Set( &p_sys->end_date, VLC_TS_INVALID );
319 /*****************************************************************************
320 * DecoderErrorCallback: called when the libflac decoder encounters an error
321 *****************************************************************************/
322 static void DecoderErrorCallback( const FLAC__StreamDecoder *decoder,
323 FLAC__StreamDecoderErrorStatus status,
327 decoder_t *p_dec = (decoder_t *)client_data;
331 case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
332 msg_Warn( p_dec, "an error in the stream caused the decoder to "
333 "lose synchronization." );
335 case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
336 msg_Err( p_dec, "the decoder encountered a corrupted frame header." );
338 case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
339 msg_Err( p_dec, "frame's data did not match the CRC in the "
343 msg_Err( p_dec, "got decoder error: %d", status );
346 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
349 /*****************************************************************************
350 * OpenDecoder: probe the decoder and return score
351 *****************************************************************************/
352 static int OpenDecoder( vlc_object_t *p_this )
354 decoder_t *p_dec = (decoder_t*)p_this;
355 decoder_sys_t *p_sys;
357 if( p_dec->fmt_in.i_codec != VLC_CODEC_FLAC )
362 /* Allocate the memory needed to store the decoder's structure */
363 if( ( p_dec->p_sys = p_sys = malloc(sizeof(*p_sys)) ) == NULL )
367 p_sys->b_stream_info = false;
368 p_sys->p_block = NULL;
370 /* Take care of flac init */
371 if( !(p_sys->p_flac = FLAC__stream_decoder_new()) )
373 msg_Err( p_dec, "FLAC__stream_decoder_new() failed" );
378 #ifdef USE_NEW_FLAC_API
379 if( FLAC__stream_decoder_init_stream( p_sys->p_flac,
385 DecoderWriteCallback,
386 DecoderMetadataCallback,
387 DecoderErrorCallback,
389 != FLAC__STREAM_DECODER_INIT_STATUS_OK )
391 msg_Err( p_dec, "FLAC__stream_decoder_init_stream() failed" );
392 FLAC__stream_decoder_delete( p_sys->p_flac );
397 FLAC__stream_decoder_set_read_callback( p_sys->p_flac,
398 DecoderReadCallback );
399 FLAC__stream_decoder_set_write_callback( p_sys->p_flac,
400 DecoderWriteCallback );
401 FLAC__stream_decoder_set_metadata_callback( p_sys->p_flac,
402 DecoderMetadataCallback );
403 FLAC__stream_decoder_set_error_callback( p_sys->p_flac,
404 DecoderErrorCallback );
405 FLAC__stream_decoder_set_client_data( p_sys->p_flac, p_dec );
407 FLAC__stream_decoder_init( p_sys->p_flac );
410 /* Set output properties */
411 p_dec->fmt_out.i_cat = AUDIO_ES;
412 p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
415 p_dec->pf_decode_audio = DecodeBlock;
418 p_dec->b_need_packetized = true;
423 /*****************************************************************************
424 * CloseDecoder: flac decoder destruction
425 *****************************************************************************/
426 static void CloseDecoder( vlc_object_t *p_this )
428 decoder_t *p_dec = (decoder_t *)p_this;
429 decoder_sys_t *p_sys = p_dec->p_sys;
431 FLAC__stream_decoder_finish( p_sys->p_flac );
432 FLAC__stream_decoder_delete( p_sys->p_flac );
435 block_Release( p_sys->p_block );
439 /*****************************************************************************
440 * ProcessHeader: process Flac header.
441 *****************************************************************************/
442 static void ProcessHeader( decoder_t *p_dec )
444 decoder_sys_t *p_sys = p_dec->p_sys;
446 if( !p_dec->fmt_in.i_extra )
449 /* Decode STREAMINFO */
450 msg_Dbg( p_dec, "decode STREAMINFO" );
451 p_sys->p_block = block_New( p_dec, p_dec->fmt_in.i_extra );
452 memcpy( p_sys->p_block->p_buffer, p_dec->fmt_in.p_extra,
453 p_dec->fmt_in.i_extra );
454 FLAC__stream_decoder_process_until_end_of_metadata( p_sys->p_flac );
455 msg_Dbg( p_dec, "STREAMINFO decoded" );
458 /*****************************************************************************
459 * decoder_state_error: print meaningful error messages
460 *****************************************************************************/
461 static void decoder_state_error( decoder_t *p_dec,
462 FLAC__StreamDecoderState state )
466 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
467 msg_Dbg( p_dec, "the decoder is ready to search for metadata." );
469 case FLAC__STREAM_DECODER_READ_METADATA:
470 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
471 "reading metadata." );
473 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
474 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
475 "searching for the frame sync code." );
477 case FLAC__STREAM_DECODER_READ_FRAME:
478 msg_Dbg( p_dec, "the decoder is ready to or is in the process of "
479 "reading a frame." );
481 case FLAC__STREAM_DECODER_END_OF_STREAM:
482 msg_Dbg( p_dec, "the decoder has reached the end of the stream." );
484 #ifdef USE_NEW_FLAC_API
485 case FLAC__STREAM_DECODER_OGG_ERROR:
486 msg_Err( p_dec, "error occurred in the Ogg layer." );
488 case FLAC__STREAM_DECODER_SEEK_ERROR:
489 msg_Err( p_dec, "error occurred while seeking." );
492 case FLAC__STREAM_DECODER_ABORTED:
493 msg_Warn( p_dec, "the decoder was aborted by the read callback." );
495 #ifndef USE_NEW_FLAC_API
496 case FLAC__STREAM_DECODER_UNPARSEABLE_STREAM:
497 msg_Warn( p_dec, "the decoder encountered reserved fields in use "
501 case FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
502 msg_Err( p_dec, "error when allocating memory." );
504 #ifndef USE_NEW_FLAC_API
505 case FLAC__STREAM_DECODER_ALREADY_INITIALIZED:
506 msg_Err( p_dec, "FLAC__stream_decoder_init() was called when the "
507 "decoder was already initialized, usually because "
508 "FLAC__stream_decoder_finish() was not called." );
510 case FLAC__STREAM_DECODER_INVALID_CALLBACK:
511 msg_Err( p_dec, "FLAC__stream_decoder_init() was called without "
512 "all callbacks being set." );
515 case FLAC__STREAM_DECODER_UNINITIALIZED:
516 msg_Err( p_dec, "decoder in uninitialized state." );
519 msg_Warn(p_dec, "unknown error" );
523 /****************************************************************************
524 * DecodeBlock: the whole thing
525 ****************************************************************************/
526 static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
528 decoder_sys_t *p_sys = p_dec->p_sys;
530 if( !pp_block || !*pp_block )
532 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
534 block_Release( *pp_block );
538 if( !p_sys->b_stream_info )
539 ProcessHeader( p_dec );
541 p_sys->p_block = *pp_block;
544 if( p_sys->p_block->i_pts > VLC_TS_INVALID &&
545 p_sys->p_block->i_pts != date_Get( &p_sys->end_date ) )
546 date_Set( &p_sys->end_date, p_sys->p_block->i_pts );
548 p_sys->p_aout_buffer = 0;
550 if( !FLAC__stream_decoder_process_single( p_sys->p_flac ) )
552 decoder_state_error( p_dec,
553 FLAC__stream_decoder_get_state( p_sys->p_flac ) );
554 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
557 /* If the decoder is in the "aborted" state,
558 * FLAC__stream_decoder_process_single() won't return an error. */
559 if( FLAC__stream_decoder_get_state(p_dec->p_sys->p_flac)
560 == FLAC__STREAM_DECODER_ABORTED )
562 FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
565 block_Release( p_sys->p_block );
566 p_sys->p_block = NULL;
568 return p_sys->p_aout_buffer;
571 /*****************************************************************************
572 * encoder_sys_t : flac encoder descriptor
573 *****************************************************************************/
583 FLAC__int32 *p_buffer;
584 unsigned int i_buffer;
591 FLAC__StreamEncoder *p_flac;
592 FLAC__StreamMetadata_StreamInfo stream_info;
600 #define STREAMINFO_SIZE 38
602 static block_t *Encode( encoder_t *, block_t * );
604 /*****************************************************************************
605 * EncoderWriteCallback: called by libflac to output encoded samples
606 *****************************************************************************/
607 static FLAC__StreamEncoderWriteStatus
608 EncoderWriteCallback( const FLAC__StreamEncoder *encoder,
609 const FLAC__byte buffer[],
610 size_t bytes, unsigned samples,
611 unsigned current_frame, void *client_data )
613 VLC_UNUSED(encoder); VLC_UNUSED(current_frame);
614 encoder_t *p_enc = (encoder_t *)client_data;
615 encoder_sys_t *p_sys = p_enc->p_sys;
620 if( p_sys->i_headers == 1 )
622 msg_Dbg( p_enc, "Writing STREAMINFO: %zu", bytes );
624 /* Backup the STREAMINFO metadata block */
625 p_enc->fmt_out.i_extra = STREAMINFO_SIZE + 4;
626 p_enc->fmt_out.p_extra = xmalloc( STREAMINFO_SIZE + 4 );
627 memcpy( p_enc->fmt_out.p_extra, "fLaC", 4 );
628 memcpy( ((uint8_t *)p_enc->fmt_out.p_extra) + 4, buffer,
631 /* Fake this as the last metadata block */
632 ((uint8_t*)p_enc->fmt_out.p_extra)[4] |= 0x80;
635 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
638 p_block = block_New( p_enc, bytes );
639 memcpy( p_block->p_buffer, buffer, bytes );
641 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
643 p_sys->i_samples_delay -= samples;
645 p_block->i_length = (mtime_t)1000000 *
646 (mtime_t)samples / (mtime_t)p_enc->fmt_in.audio.i_rate;
649 p_sys->i_pts += p_block->i_length;
651 block_ChainAppend( &p_sys->p_chain, p_block );
653 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
655 /*****************************************************************************
656 * EncoderMetadataCallback: called by libflac to output metadata
657 *****************************************************************************/
658 static void EncoderMetadataCallback( const FLAC__StreamEncoder *encoder,
659 const FLAC__StreamMetadata *metadata,
663 encoder_t *p_enc = (encoder_t *)client_data;
665 msg_Err( p_enc, "MetadataCallback: %i", metadata->type );
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;
677 if( p_enc->fmt_out.i_codec != VLC_CODEC_FLAC &&
683 /* Allocate the memory needed to store the decoder's structure */
684 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
686 p_enc->p_sys = p_sys;
687 p_enc->pf_encode_audio = Encode;
688 p_enc->fmt_out.i_codec = VLC_CODEC_FLAC;
690 p_sys->i_headers = 0;
693 p_sys->i_samples_delay = 0;
695 /* Create flac encoder */
696 if( !(p_sys->p_flac = FLAC__stream_encoder_new()) )
698 msg_Err( p_enc, "FLAC__stream_encoder_new() failed" );
703 FLAC__stream_encoder_set_streamable_subset( p_sys->p_flac, 1 );
704 FLAC__stream_encoder_set_channels( p_sys->p_flac,
705 p_enc->fmt_in.audio.i_channels );
706 FLAC__stream_encoder_set_sample_rate( p_sys->p_flac,
707 p_enc->fmt_in.audio.i_rate );
708 FLAC__stream_encoder_set_bits_per_sample( p_sys->p_flac, 16 );
709 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
711 /* Get and store the STREAMINFO metadata block as a p_extra */
714 #ifdef USE_NEW_FLAC_API
715 if( FLAC__stream_encoder_init_stream( p_sys->p_flac,
716 EncoderWriteCallback,
719 EncoderMetadataCallback,
721 != FLAC__STREAM_ENCODER_INIT_STATUS_OK )
723 msg_Err( p_enc, "FLAC__stream_encoder_init_stream() failed" );
724 FLAC__stream_encoder_delete( p_sys->p_flac );
729 FLAC__stream_encoder_set_write_callback( p_sys->p_flac,
730 EncoderWriteCallback );
731 FLAC__stream_encoder_set_metadata_callback( p_sys->p_flac,
732 EncoderMetadataCallback );
733 FLAC__stream_encoder_set_client_data( p_sys->p_flac, p_enc );
735 FLAC__stream_encoder_init( p_sys->p_flac );
741 /****************************************************************************
742 * Encode: the whole thing
743 ****************************************************************************
744 * This function spits out ogg packets.
745 ****************************************************************************/
746 static block_t *Encode( encoder_t *p_enc, block_t *p_aout_buf )
748 encoder_sys_t *p_sys = p_enc->p_sys;
752 p_sys->i_pts = p_aout_buf->i_pts -
753 (mtime_t)1000000 * (mtime_t)p_sys->i_samples_delay /
754 (mtime_t)p_enc->fmt_in.audio.i_rate;
756 p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
758 /* Convert samples to FLAC__int32 */
759 if( p_sys->i_buffer < p_aout_buf->i_buffer * 2 )
762 xrealloc( p_sys->p_buffer, p_aout_buf->i_buffer * 2 );
763 p_sys->i_buffer = p_aout_buf->i_buffer * 2;
766 for( i = 0 ; i < p_aout_buf->i_buffer / 2 ; i++ )
768 p_sys->p_buffer[i]= ((int16_t *)p_aout_buf->p_buffer)[i];
771 FLAC__stream_encoder_process_interleaved( p_sys->p_flac, p_sys->p_buffer,
772 p_aout_buf->i_nb_samples );
774 p_chain = p_sys->p_chain;
780 /*****************************************************************************
781 * CloseEncoder: encoder destruction
782 *****************************************************************************/
783 static void CloseEncoder( vlc_object_t *p_this )
785 encoder_t *p_enc = (encoder_t *)p_this;
786 encoder_sys_t *p_sys = p_enc->p_sys;
788 FLAC__stream_encoder_delete( p_sys->p_flac );
790 free( p_sys->p_buffer );