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packetizer: a52: add EAC3 header defines
[vlc.git] / modules / demux / mpeg / es.c
blob731049bf1469e572fc3a635bf3a23524d3eb2bbe
1 /*****************************************************************************
2 * es.c : Generic audio ES input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2008 VLC authors and VideoLAN
5 * $Id$
6 *
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
9 *
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.
14 *
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.
19 *
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 *****************************************************************************/
24
25 /*****************************************************************************
26 * Preamble
27 *****************************************************************************/
28
29 #ifdef HAVE_CONFIG_H
30 # include "config.h"
31 #endif
32
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_demux.h>
36 #include <vlc_codec.h>
37 #include <vlc_codecs.h>
38 #include <vlc_input.h>
39
40 #include "../../packetizer/a52.h"
41 #include "../../packetizer/dts_header.h"
42 #include "../meta_engine/ID3Tag.h"
43 #include "../meta_engine/ID3Text.h"
44 #include "../meta_engine/ID3Meta.h"
45
46 /*****************************************************************************
47 * Module descriptor
48 *****************************************************************************/
49 static int OpenAudio( vlc_object_t * );
50 static int OpenVideo( vlc_object_t * );
51 static void Close ( vlc_object_t * );
52
53 #define FPS_TEXT N_("Frames per Second")
54 #define FPS_LONGTEXT N_("This is the frame rate used as a fallback when " \
55 "playing MPEG video elementary streams.")
56
57 vlc_module_begin ()
58 set_category( CAT_INPUT )
59 set_subcategory( SUBCAT_INPUT_DEMUX )
60 set_description( N_("MPEG-I/II/4 / A52 / DTS / MLP audio" ) )
61 set_shortname( N_("Audio ES") )
62 set_capability( "demux", 155 )
63 set_callbacks( OpenAudio, Close )
64
65 add_shortcut( "mpga", "mp3",
66 "m4a", "mp4a", "aac",
67 "ac3", "a52",
68 "eac3",
69 "dts",
70 "mlp", "thd" )
71
72 add_submodule()
73 set_description( N_("MPEG-4 video" ) )
74 set_capability( "demux", 5 )
75 set_callbacks( OpenVideo, Close )
76 add_float( "es-fps", 25, FPS_TEXT, FPS_LONGTEXT, false )
77
78 add_shortcut( "m4v" )
79 add_shortcut( "mp4v" )
80 vlc_module_end ()
81
82 /*****************************************************************************
83 * Local prototypes
84 *****************************************************************************/
85 static int Demux ( demux_t * );
86 static int Control( demux_t *, int, va_list );
87
88 #define WAV_PROBE_SIZE (512*1024)
89 #define BASE_PROBE_SIZE (8000)
90 #define WAV_EXTRA_PROBE_SIZE (44000/2*2*2)
91
92 typedef struct
93 {
94 vlc_fourcc_t i_codec;
95 bool b_use_word;
96 const char *psz_name;
97 int (*pf_probe)( demux_t *p_demux, uint64_t *pi_offset );
98 int (*pf_init)( demux_t *p_demux );
99 } codec_t;
100
101 typedef struct
102 {
103 char psz_version[10];
104 int i_lowpass;
105 } lame_extra_t;
106
107 typedef struct
108 {
109 vlc_tick_t i_time;
110 uint64_t i_pos;
111 bs_t br;
112 } sync_table_ctx_t;
113
114 typedef struct
115 {
116 uint16_t i_frames_btw_refs;
117 uint32_t i_bytes_btw_refs;
118 uint32_t i_ms_btw_refs;
119 uint8_t i_bits_per_bytes_dev;
120 uint8_t i_bits_per_ms_dev;
121 uint8_t *p_bits;
122 size_t i_bits;
123 sync_table_ctx_t current;
124 } sync_table_t;
125
126 typedef struct
127 {
128 codec_t codec;
129 vlc_fourcc_t i_original;
130
131 es_out_id_t *p_es;
132
133 bool b_start;
134 decoder_t *p_packetizer;
135 block_t *p_packetized_data;
136
137 vlc_tick_t i_pts;
138 vlc_tick_t i_time_offset;
139 int64_t i_bytes;
140
141 bool b_big_endian;
142 bool b_estimate_bitrate;
143 int i_bitrate_avg; /* extracted from Xing header */
144
145 bool b_initial_sync_failed;
146
147 int i_packet_size;
148
149 uint64_t i_stream_offset;
150
151 float f_fps;
152
153 /* Mpga specific */
154 struct
155 {
156 int i_frames;
157 int i_bytes;
158 int i_bitrate_avg;
159 int i_frame_samples;
160 lame_extra_t lame;
161 bool b_lame;
162 } xing;
163
164 float rgf_replay_gain[AUDIO_REPLAY_GAIN_MAX];
165 float rgf_replay_peak[AUDIO_REPLAY_GAIN_MAX];
166
167 sync_table_t mllt;
168 } demux_sys_t;
169
170 static int MpgaProbe( demux_t *p_demux, uint64_t *pi_offset );
171 static int MpgaInit( demux_t *p_demux );
172
173 static int AacProbe( demux_t *p_demux, uint64_t *pi_offset );
174 static int AacInit( demux_t *p_demux );
175
176 static int EA52Probe( demux_t *p_demux, uint64_t *pi_offset );
177 static int A52Probe( demux_t *p_demux, uint64_t *pi_offset );
178 static int A52Init( demux_t *p_demux );
179
180 static int DtsProbe( demux_t *p_demux, uint64_t *pi_offset );
181 static int DtsInit( demux_t *p_demux );
182
183 static int MlpProbe( demux_t *p_demux, uint64_t *pi_offset );
184 static int ThdProbe( demux_t *p_demux, uint64_t *pi_offset );
185 static int MlpInit( demux_t *p_demux );
186
187 static bool Parse( demux_t *p_demux, block_t **pp_output );
188 static uint64_t SeekByMlltTable( demux_t *p_demux, vlc_tick_t *pi_time );
189
190 static const codec_t p_codecs[] = {
191 { VLC_CODEC_MP4A, false, "mp4 audio", AacProbe, AacInit },
192 { VLC_CODEC_MPGA, false, "mpeg audio", MpgaProbe, MpgaInit },
193 { VLC_CODEC_A52, true, "a52 audio", A52Probe, A52Init },
194 { VLC_CODEC_EAC3, true, "eac3 audio", EA52Probe, A52Init },
195 { VLC_CODEC_DTS, false, "dts audio", DtsProbe, DtsInit },
196 { VLC_CODEC_MLP, false, "mlp audio", MlpProbe, MlpInit },
197 { VLC_CODEC_TRUEHD, false, "TrueHD audio", ThdProbe, MlpInit },
198
199 { 0, false, NULL, NULL, NULL }
200 };
201
202 static int VideoInit( demux_t *p_demux );
203
204 static const codec_t codec_m4v = {
205 VLC_CODEC_MP4V, false, "mp4 video", NULL, VideoInit
206 };
207
208 /*****************************************************************************
209 * OpenCommon: initializes demux structures
210 *****************************************************************************/
211 static int OpenCommon( demux_t *p_demux,
212 int i_cat, const codec_t *p_codec, uint64_t i_bs_offset )
213 {
214 demux_sys_t *p_sys;
215
216 es_format_t fmt;
217
218 DEMUX_INIT_COMMON(); p_sys = p_demux->p_sys;
219 memset( p_sys, 0, sizeof( demux_sys_t ) );
220 p_sys->codec = *p_codec;
221 p_sys->p_es = NULL;
222 p_sys->b_start = true;
223 p_sys->i_stream_offset = i_bs_offset;
224 p_sys->b_estimate_bitrate = true;
225 p_sys->i_bitrate_avg = 0;
226 p_sys->b_big_endian = false;
227 p_sys->f_fps = var_InheritFloat( p_demux, "es-fps" );
228 p_sys->p_packetized_data = NULL;
229
230 if( vlc_stream_Seek( p_demux->s, p_sys->i_stream_offset ) )
231 {
232 free( p_sys );
233 return VLC_EGENERIC;
234 }
235
236 if( p_sys->codec.pf_init( p_demux ) )
237 {
238 free( p_sys );
239 return VLC_EGENERIC;
240 }
241
242 msg_Dbg( p_demux, "detected format %4.4s", (const char*)&p_sys->codec.i_codec );
243
244 /* Load the audio packetizer */
245 es_format_Init( &fmt, i_cat, p_sys->codec.i_codec );
246 fmt.i_original_fourcc = p_sys->i_original;
247 p_sys->p_packetizer = demux_PacketizerNew( p_demux, &fmt, p_sys->codec.psz_name );
248 if( !p_sys->p_packetizer )
249 {
250 free( p_sys );
251 return VLC_EGENERIC;
252 }
253
254 es_format_t *p_fmt = &p_sys->p_packetizer->fmt_out;
255 for( int i = 0; i < AUDIO_REPLAY_GAIN_MAX; i++ )
256 {
257 if ( p_sys->rgf_replay_gain[i] != 0.0 )
258 {
259 p_fmt->audio_replay_gain.pb_gain[i] = true;
260 p_fmt->audio_replay_gain.pf_gain[i] = p_sys->rgf_replay_gain[i];
261 }
262 if ( p_sys->rgf_replay_peak[i] != 0.0 )
263 {
264 p_fmt->audio_replay_gain.pb_peak[i] = true;
265 p_fmt->audio_replay_gain.pf_peak[i] = p_sys->rgf_replay_peak[i];
266 }
267 }
268
269 for( ;; )
270 {
271 if( Parse( p_demux, &p_sys->p_packetized_data ) )
272 break;
273 if( p_sys->p_packetized_data )
274 break;
275 }
276
277 return VLC_SUCCESS;
278 }
279 static int OpenAudio( vlc_object_t *p_this )
280 {
281 demux_t *p_demux = (demux_t*)p_this;
282 for( int i = 0; p_codecs[i].i_codec != 0; i++ )
283 {
284 uint64_t i_offset;
285 if( !p_codecs[i].pf_probe( p_demux, &i_offset ) )
286 return OpenCommon( p_demux, AUDIO_ES, &p_codecs[i], i_offset );
287 }
288 return VLC_EGENERIC;
289 }
290 static int OpenVideo( vlc_object_t *p_this )
291 {
292 demux_t *p_demux = (demux_t*)p_this;
293
294 /* Only m4v is supported for the moment */
295 bool b_m4v_ext = demux_IsPathExtension( p_demux, ".m4v" );
296 bool b_re4_ext = !b_m4v_ext && demux_IsPathExtension( p_demux, ".re4" );
297 bool b_m4v_forced = demux_IsForced( p_demux, "m4v" ) ||
298 demux_IsForced( p_demux, "mp4v" );
299
300 if( !b_m4v_ext && !b_m4v_forced && !b_re4_ext )
301 return VLC_EGENERIC;
302
303 ssize_t i_off = b_re4_ext ? 220 : 0;
304 const uint8_t *p_peek;
305 if( vlc_stream_Peek( p_demux->s, &p_peek, i_off + 4 ) < i_off + 4 )
306 return VLC_EGENERIC;
307 if( p_peek[i_off + 0] != 0x00 || p_peek[i_off + 1] != 0x00 || p_peek[i_off + 2] != 0x01 )
308 {
309 if( !b_m4v_forced)
310 return VLC_EGENERIC;
311 msg_Warn( p_demux,
312 "this doesn't look like an MPEG ES stream, continuing anyway" );
313 }
314 return OpenCommon( p_demux, VIDEO_ES, &codec_m4v, i_off );
315 }
316 /*****************************************************************************
317 * Demux: reads and demuxes data packets
318 *****************************************************************************
319 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
320 *****************************************************************************/
321 static int Demux( demux_t *p_demux )
322 {
323 int ret = 1;
324 demux_sys_t *p_sys = p_demux->p_sys;
325
326 block_t *p_block_out = p_sys->p_packetized_data;
327 if( p_block_out )
328 p_sys->p_packetized_data = NULL;
329 else
330 ret = Parse( p_demux, &p_block_out ) ? 0 : 1;
331
332 while( p_block_out )
333 {
334 block_t *p_next = p_block_out->p_next;
335
336 /* Correct timestamp */
337 if( p_sys->p_packetizer->fmt_out.i_cat == VIDEO_ES )
338 {
339 if( p_block_out->i_pts == VLC_TICK_INVALID &&
340 p_block_out->i_dts == VLC_TICK_INVALID )
341 p_block_out->i_dts = VLC_TICK_0 + p_sys->i_pts + VLC_TICK_FROM_SEC(1) / p_sys->f_fps;
342 if( p_block_out->i_dts != VLC_TICK_INVALID )
343 p_sys->i_pts = p_block_out->i_dts - VLC_TICK_0;
344 }
345 else
346 {
347 p_sys->i_pts = p_block_out->i_pts - VLC_TICK_0;
348 }
349
350 if( p_block_out->i_pts != VLC_TICK_INVALID )
351 {
352 p_block_out->i_pts += p_sys->i_time_offset;
353 }
354 if( p_block_out->i_dts != VLC_TICK_INVALID )
355 {
356 p_block_out->i_dts += p_sys->i_time_offset;
357 es_out_SetPCR( p_demux->out, p_block_out->i_dts );
358 }
359 /* Re-estimate bitrate */
360 if( p_sys->b_estimate_bitrate && p_sys->i_pts > VLC_TICK_FROM_MS(500) )
361 p_sys->i_bitrate_avg = 8 * CLOCK_FREQ * p_sys->i_bytes
362 / (p_sys->i_pts - 1);
363 p_sys->i_bytes += p_block_out->i_buffer;
364
365
366 p_block_out->p_next = NULL;
367 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
368
369 p_block_out = p_next;
370 }
371 return ret;
372 }
373
374 /*****************************************************************************
375 * Close: frees unused data
376 *****************************************************************************/
377 static void Close( vlc_object_t * p_this )
378 {
379 demux_t *p_demux = (demux_t*)p_this;
380 demux_sys_t *p_sys = p_demux->p_sys;
381
382 if( p_sys->p_packetized_data )
383 block_ChainRelease( p_sys->p_packetized_data );
384 if( p_sys->mllt.p_bits )
385 free( p_sys->mllt.p_bits );
386 demux_PacketizerDestroy( p_sys->p_packetizer );
387 free( p_sys );
388 }
389
390 /*****************************************************************************
391 * Control:
392 *****************************************************************************/
393 static int Control( demux_t *p_demux, int i_query, va_list args )
394 {
395 demux_sys_t *p_sys = p_demux->p_sys;
396 bool *pb_bool;
397
398 switch( i_query )
399 {
400 case DEMUX_HAS_UNSUPPORTED_META:
401 pb_bool = va_arg( args, bool * );
402 *pb_bool = true;
403 return VLC_SUCCESS;
404
405 case DEMUX_GET_TIME:
406 *va_arg( args, vlc_tick_t * ) = p_sys->i_pts + p_sys->i_time_offset;
407 return VLC_SUCCESS;
408
409 case DEMUX_GET_LENGTH:
410 {
411 va_list ap;
412 int i_ret;
413
414 va_copy ( ap, args );
415 i_ret = demux_vaControlHelper( p_demux->s, p_sys->i_stream_offset,
416 -1, p_sys->i_bitrate_avg, 1, i_query, ap );
417 va_end( ap );
418
419 /* No bitrate, we can't have it precisely, but we can compute
420 * a raw approximation with time/position */
421 if( i_ret && !p_sys->i_bitrate_avg )
422 {
423 float f_pos = (double)(uint64_t)( vlc_stream_Tell( p_demux->s ) ) /
424 (double)(uint64_t)( stream_Size( p_demux->s ) );
425 /* The first few seconds are guaranteed to be very whacky,
426 * don't bother trying ... Too bad */
427 if( f_pos < 0.01f ||
428 (p_sys->i_pts + p_sys->i_time_offset) < VLC_TICK_FROM_SEC(8) )
429 {
430 return VLC_EGENERIC;
431 }
432
433 *va_arg( args, vlc_tick_t * ) =
434 (p_sys->i_pts + p_sys->i_time_offset) / f_pos;
435 return VLC_SUCCESS;
436 }
437 return i_ret;
438 }
439
440 case DEMUX_SET_TIME:
441 if( p_sys->mllt.p_bits )
442 {
443 vlc_tick_t i_time = va_arg(args, vlc_tick_t);
444 uint64_t i_pos = SeekByMlltTable( p_demux, &i_time );
445 int i_ret = vlc_stream_Seek( p_demux->s, p_sys->i_stream_offset + i_pos );
446 if( i_ret != VLC_SUCCESS )
447 return i_ret;
448 p_sys->i_time_offset = i_time - p_sys->i_pts;
449 /* And reset buffered data */
450 if( p_sys->p_packetized_data )
451 block_ChainRelease( p_sys->p_packetized_data );
452 p_sys->p_packetized_data = NULL;
453 return VLC_SUCCESS;
454 }
455 /* FIXME TODO: implement a high precision seek (with mp3 parsing)
456 * needed for multi-input */
457 break;
458 }
459
460 int ret = demux_vaControlHelper( p_demux->s, p_sys->i_stream_offset, -1,
461 p_sys->i_bitrate_avg, 1, i_query, args );
462 if( ret != VLC_SUCCESS )
463 return ret;
464
465 if( p_sys->i_bitrate_avg > 0
466 && (i_query == DEMUX_SET_POSITION || i_query == DEMUX_SET_TIME) )
467 {
468 int64_t i_time = INT64_C(8000000)
469 * ( vlc_stream_Tell(p_demux->s) - p_sys->i_stream_offset )
470 / p_sys->i_bitrate_avg;
471
472 /* Fix time_offset */
473 if( i_time >= 0 )
474 p_sys->i_time_offset = i_time - p_sys->i_pts;
475 /* And reset buffered data */
476 if( p_sys->p_packetized_data )
477 block_ChainRelease( p_sys->p_packetized_data );
478 p_sys->p_packetized_data = NULL;
479 }
480 return VLC_SUCCESS;
481 }
482
483 /*****************************************************************************
484 * Makes a link list of buffer of parsed data
485 * Returns true if EOF
486 *****************************************************************************/
487 static bool Parse( demux_t *p_demux, block_t **pp_output )
488 {
489 demux_sys_t *p_sys = p_demux->p_sys;
490 block_t *p_block_in, *p_block_out;
491
492 *pp_output = NULL;
493
494 if( p_sys->codec.b_use_word )
495 {
496 /* Make sure we are word aligned */
497 int64_t i_pos = vlc_stream_Tell( p_demux->s );
498 if( (i_pos & 1) && vlc_stream_Read( p_demux->s, NULL, 1 ) != 1 )
499 return true;
500 }
501
502 p_block_in = vlc_stream_Block( p_demux->s, p_sys->i_packet_size );
503 bool b_eof = p_block_in == NULL;
504
505 if( p_block_in )
506 {
507 if( p_sys->codec.b_use_word && !p_sys->b_big_endian && p_block_in->i_buffer > 0 )
508 {
509 /* Convert to big endian */
510 swab( p_block_in->p_buffer, p_block_in->p_buffer, p_block_in->i_buffer );
511 }
512
513 p_block_in->i_pts = p_block_in->i_dts = p_sys->b_start || p_sys->b_initial_sync_failed ? VLC_TICK_0 : VLC_TICK_INVALID;
514 }
515 p_sys->b_initial_sync_failed = p_sys->b_start; /* Only try to resync once */
516
517 while( ( p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, p_block_in ? &p_block_in : NULL ) ) )
518 {
519 p_sys->b_initial_sync_failed = false;
520 while( p_block_out )
521 {
522 if( !p_sys->p_es )
523 {
524 p_sys->p_packetizer->fmt_out.b_packetized = true;
525 p_sys->p_es = es_out_Add( p_demux->out,
526 &p_sys->p_packetizer->fmt_out);
527
528
529 /* Try the xing header */
530 if( p_sys->xing.i_bytes && p_sys->xing.i_frames &&
531 p_sys->xing.i_frame_samples )
532 {
533 p_sys->i_bitrate_avg = p_sys->xing.i_bytes * INT64_C(8) *
534 p_sys->p_packetizer->fmt_out.audio.i_rate /
535 p_sys->xing.i_frames / p_sys->xing.i_frame_samples;
536
537 if( p_sys->i_bitrate_avg > 0 )
538 p_sys->b_estimate_bitrate = false;
539 }
540 /* Use the bitrate as initual value */
541 if( p_sys->b_estimate_bitrate )
542 p_sys->i_bitrate_avg = p_sys->p_packetizer->fmt_out.i_bitrate;
543 }
544
545 block_t *p_next = p_block_out->p_next;
546 p_block_out->p_next = NULL;
547
548 block_ChainLastAppend( &pp_output, p_block_out );
549
550 p_block_out = p_next;
551 }
552 }
553
554 if( p_sys->b_initial_sync_failed )
555 msg_Dbg( p_demux, "did not sync on first block" );
556 p_sys->b_start = false;
557
558 return b_eof;
559 }
560
561 /* Check to apply to WAVE fmt header */
562 static int GenericFormatCheck( int i_format, const uint8_t *p_head )
563 {
564 if ( i_format == WAVE_FORMAT_PCM )
565 {
566 if( GetWLE( p_head /* nChannels */ ) != 2 )
567 return VLC_EGENERIC;
568 if( GetDWLE( p_head + 2 /* nSamplesPerSec */ ) != 44100 )
569 return VLC_EGENERIC;
570 }
571 return VLC_SUCCESS;
572 }
573
574 /*****************************************************************************
575 * Wav header skipper
576 *****************************************************************************/
577 static int WavSkipHeader( demux_t *p_demux, uint64_t *pi_skip,
578 const uint16_t rgi_twocc[],
579 int (*pf_format_check)( int, const uint8_t * ) )
580 {
581 const uint8_t *p_peek;
582 size_t i_peek = 0;
583 uint32_t i_len;
584
585 /* */
586 *pi_skip = 0;
587
588 /* Check if we are dealing with a WAV file */
589 if( vlc_stream_Peek( p_demux->s, &p_peek, 12+8 ) != 12 + 8 )
590 return VLC_SUCCESS;
591
592 if( memcmp( p_peek, "RIFF", 4 ) || memcmp( &p_peek[8], "WAVE", 4 ) )
593 return VLC_SUCCESS;
594
595 /* Find the wave format header */
596 i_peek = 12 + 8;
597 while( memcmp( p_peek + i_peek - 8, "fmt ", 4 ) )
598 {
599 i_len = GetDWLE( p_peek + i_peek - 4 );
600 if( i_len > WAV_PROBE_SIZE || i_peek + i_len > WAV_PROBE_SIZE )
601 return VLC_EGENERIC;
602
603 i_peek += i_len + 8;
604 if( vlc_stream_Peek( p_demux->s, &p_peek, i_peek ) != (ssize_t) i_peek )
605 return VLC_EGENERIC;
606 }
607
608 /* Sanity check the wave format header */
609 i_len = GetDWLE( p_peek + i_peek - 4 );
610 if( i_len > WAV_PROBE_SIZE )
611 return VLC_EGENERIC;
612
613 i_peek += i_len + 8;
614 if( vlc_stream_Peek( p_demux->s, &p_peek, i_peek ) != (ssize_t) i_peek )
615 return VLC_EGENERIC;
616 const uint16_t i_twocc = GetWLE( p_peek + i_peek - i_len - 8 /* wFormatTag */ );
617 int i_format_idx;
618 for( i_format_idx = 0; rgi_twocc[i_format_idx] != WAVE_FORMAT_UNKNOWN; i_format_idx++ )
619 {
620 if( i_twocc == rgi_twocc[i_format_idx] )
621 break;
622 }
623 if( rgi_twocc[i_format_idx] == WAVE_FORMAT_UNKNOWN )
624 return VLC_EGENERIC;
625
626 if( pf_format_check &&
627 pf_format_check( i_twocc, p_peek + i_peek - i_len - 6 ) != VLC_SUCCESS )
628 return VLC_EGENERIC;
629
630 /* Skip the wave header */
631 while( memcmp( p_peek + i_peek - 8, "data", 4 ) )
632 {
633 i_len = GetDWLE( p_peek + i_peek - 4 );
634 if( i_len > WAV_PROBE_SIZE || i_peek + i_len > WAV_PROBE_SIZE )
635 return VLC_EGENERIC;
636
637 i_peek += i_len + 8;
638 if( vlc_stream_Peek( p_demux->s, &p_peek, i_peek ) != (ssize_t) i_peek )
639 return VLC_EGENERIC;
640 }
641 *pi_skip = i_peek;
642 return VLC_SUCCESS;
643 }
644
645 static int GenericProbe( demux_t *p_demux, uint64_t *pi_offset,
646 const char * ppsz_name[],
647 int (*pf_check)( const uint8_t *, unsigned * ),
648 unsigned i_check_size,
649 unsigned i_base_probing,
650 unsigned i_wav_extra_probing,
651 bool b_use_word,
652 const uint16_t pi_twocc[],
653 int (*pf_format_check)( int, const uint8_t * ) )
654 {
655 bool b_forced_demux;
656
657 uint64_t i_offset;
658 const uint8_t *p_peek;
659 uint64_t i_skip;
660
661 b_forced_demux = false;
662 for( size_t i = 0; ppsz_name[i] != NULL; i++ )
663 {
664 b_forced_demux |= demux_IsForced( p_demux, ppsz_name[i] );
665 }
666
667 i_offset = vlc_stream_Tell( p_demux->s );
668
669 if( WavSkipHeader( p_demux, &i_skip, pi_twocc, pf_format_check ) )
670 {
671 if( !b_forced_demux )
672 return VLC_EGENERIC;
673 }
674 const bool b_wav = i_skip > 0;
675
676 /* peek the begining
677 * It is common that wav files have some sort of garbage at the begining
678 * We will accept probing 0.5s of data in this case.
679 */
680 const size_t i_probe = i_skip + i_check_size + i_base_probing + ( b_wav ? i_wav_extra_probing : 0);
681 const size_t i_peek = vlc_stream_Peek( p_demux->s, &p_peek, i_probe );
682 if( i_peek < i_skip + i_check_size )
683 {
684 msg_Dbg( p_demux, "cannot peek" );
685 return VLC_EGENERIC;
686 }
687 for( ;; )
688 {
689 if( i_skip + i_check_size > i_peek )
690 {
691 if( !b_forced_demux )
692 return VLC_EGENERIC;
693 break;
694 }
695 unsigned i_samples = 0;
696 int i_size = pf_check( &p_peek[i_skip], &i_samples );
697 if( i_size >= 0 )
698 {
699 if( i_size == 0 || /* 0 sized frame ?? */
700 i_skip == 0 /* exact match from start, we're not WAVE either, so skip multiple checks (would break if padding) */ )
701 break;
702
703 /* If we have the frame size, check the next frame for
704 * extra robustness
705 * The second test is because some .wav have paddings
706 */
707 bool b_ok = false;
708 for( int t = 0; t < 1 + !!b_wav; t++ )
709 {
710 if( t == 1 )
711 {
712 if(!i_samples)
713 break;
714 i_size = i_samples * 2 * 2;
715 }
716
717 if( i_skip + i_check_size + i_size <= i_peek )
718 {
719 b_ok = pf_check( &p_peek[i_skip+i_size], NULL ) >= 0;
720 if( b_ok )
721 break;
722 }
723 }
724 if( b_ok )
725 break;
726 }
727 if( b_use_word )
728 i_skip += ((i_offset + i_skip) % 2 == 0) ? 2 : 1;
729 else
730 i_skip++;
731 if( !b_wav && !b_forced_demux )
732 return VLC_EGENERIC;
733 }
734
735 *pi_offset = i_offset + i_skip;
736 return VLC_SUCCESS;
737 }
738
739 /*****************************************************************************
740 * Mpeg I/II Audio
741 *****************************************************************************/
742 static int MpgaCheckSync( const uint8_t *p_peek )
743 {
744 uint32_t h = GetDWBE( p_peek );
745
746 if( ((( h >> 21 )&0x07FF) != 0x07FF ) /* header sync */
747 || (((h >> 19)&0x03) == 1 ) /* valid version ID ? */
748 || (((h >> 17)&0x03) == 0 ) /* valid layer ?*/
749 || (((h >> 12)&0x0F) == 0x0F ) /* valid bitrate ?*/
750 || (((h >> 10) & 0x03) == 0x03 ) /* valide sampling freq ? */
751 || ((h & 0x03) == 0x02 )) /* valid emphasis ? */
752 {
753 return false;
754 }
755 return true;
756 }
757
758 #define MPGA_VERSION( h ) ( 1 - (((h)>>19)&0x01) )
759 #define MPGA_MODE(h) (((h)>> 6)&0x03)
760
761 static int MpgaGetFrameSamples( uint32_t h )
762 {
763 const int i_layer = 3 - (((h)>>17)&0x03);
764 switch( i_layer )
765 {
766 case 0:
767 return 384;
768 case 1:
769 return 1152;
770 case 2:
771 return MPGA_VERSION(h) ? 576 : 1152;
772 default:
773 return 0;
774 }
775 }
776
777 static int MpgaProbe( demux_t *p_demux, uint64_t *pi_offset )
778 {
779 const uint16_t rgi_twocc[] = { WAVE_FORMAT_MPEG, WAVE_FORMAT_MPEGLAYER3, WAVE_FORMAT_UNKNOWN };
780 bool b_forced;
781 bool b_forced_demux;
782 uint64_t i_offset;
783
784 const uint8_t *p_peek;
785 uint64_t i_skip;
786 ssize_t i_peek;
787
788 b_forced = demux_IsPathExtension( p_demux, ".mp3" );
789 b_forced_demux = demux_IsForced( p_demux, "mp3" ) ||
790 demux_IsForced( p_demux, "mpga" );
791
792 i_offset = vlc_stream_Tell( p_demux->s );
793
794 if( WavSkipHeader( p_demux, &i_skip, rgi_twocc, NULL ) )
795 {
796 if( !b_forced_demux )
797 return VLC_EGENERIC;
798
799 return VLC_EGENERIC;
800 }
801
802 i_peek = vlc_stream_Peek( p_demux->s, &p_peek, i_skip + 4 );
803 if( i_peek <= 0 || (uint64_t) i_peek < i_skip + 4 )
804 return VLC_EGENERIC;
805
806 if( !MpgaCheckSync( &p_peek[i_skip] ) )
807 {
808 bool b_ok = false;
809
810 if( !b_forced_demux && !b_forced )
811 return VLC_EGENERIC;
812
813 i_peek = vlc_stream_Peek( p_demux->s, &p_peek, i_skip + 8096 );
814 while( i_peek > 0 && i_skip + 4 < (uint64_t) i_peek )
815 {
816 if( MpgaCheckSync( &p_peek[i_skip] ) )
817 {
818 b_ok = true;
819 break;
820 }
821 i_skip++;
822 }
823 if( !b_ok && !b_forced_demux )
824 return VLC_EGENERIC;
825 }
826 *pi_offset = i_offset + i_skip;
827 return VLC_SUCCESS;
828 }
829
830 static void MpgaXingSkip( const uint8_t **pp_xing, int *pi_xing, int i_count )
831 {
832 if(i_count > *pi_xing )
833 i_count = *pi_xing;
834
835 (*pp_xing) += i_count;
836 (*pi_xing) -= i_count;
837 }
838
839 static uint32_t MpgaXingGetDWBE( const uint8_t **pp_xing, int *pi_xing, uint32_t i_default )
840 {
841 if( *pi_xing < 4 )
842 return i_default;
843
844 uint32_t v = GetDWBE( *pp_xing );
845
846 MpgaXingSkip( pp_xing, pi_xing, 4 );
847
848 return v;
849 }
850
851 static uint16_t MpgaXingGetWBE( const uint8_t **pp_xing, int *pi_xing, uint16_t i_default )
852 {
853 if( *pi_xing < 2 )
854 return i_default;
855
856 uint16_t v = GetWBE( *pp_xing );
857
858 MpgaXingSkip( pp_xing, pi_xing, 2 );
859
860 return v;
861 }
862
863 static double MpgaXingLameConvertGain( uint16_t x )
864 {
865 double gain = (x & 0x1FF) / 10.0;
866
867 return x & 0x200 ? -gain : gain;
868 }
869
870 static double MpgaXingLameConvertPeak( uint32_t x )
871 {
872 return x / 8388608.0; /* pow(2, 23) */
873 }
874
875 static uint64_t SeekByMlltTable( demux_t *p_demux, vlc_tick_t *pi_time )
876 {
877 demux_sys_t *p_sys = p_demux->p_sys;
878 sync_table_ctx_t *p_cur = &p_sys->mllt.current;
879
880 /* reset or init context */
881 if( *pi_time < p_cur->i_time || !p_cur->br.p )
882 {
883 p_cur->i_time = 0;
884 p_cur->i_pos = 0;
885 bs_init(&p_cur->br, p_sys->mllt.p_bits, p_sys->mllt.i_bits);
886 }
887
888 while(bs_remain(&p_cur->br) >= p_sys->mllt.i_bits_per_bytes_dev + p_sys->mllt.i_bits_per_ms_dev)
889 {
890 const uint32_t i_bytesdev = bs_read(&p_cur->br, p_sys->mllt.i_bits_per_bytes_dev);
891 const uint32_t i_msdev = bs_read(&p_cur->br, p_sys->mllt.i_bits_per_ms_dev);
892 const vlc_tick_t i_deltatime = VLC_TICK_FROM_MS(p_sys->mllt.i_ms_btw_refs + i_msdev);
893 if( p_cur->i_time + i_deltatime > *pi_time )
894 break;
895 p_cur->i_time += i_deltatime;
896 p_cur->i_pos += p_sys->mllt.i_bytes_btw_refs + i_bytesdev;
897 }
898 *pi_time = p_cur->i_time;
899 return p_cur->i_pos;
900 }
901
902 static int ID3TAG_Parse_Handler( uint32_t i_tag, const uint8_t *p_payload, size_t i_payload, void *p_priv )
903 {
904 demux_t *p_demux = (demux_t *) p_priv;
905 demux_sys_t *p_sys = p_demux->p_sys;
906
907 if( i_tag == VLC_FOURCC('M', 'L', 'L', 'T') )
908 {
909 if( i_payload > 20 )
910 {
911 p_sys->mllt.i_frames_btw_refs = GetWBE(p_payload);
912 p_sys->mllt.i_bytes_btw_refs = GetDWBE(&p_payload[1]) & 0x00FFFFFF;
913 p_sys->mllt.i_ms_btw_refs = GetDWBE(&p_payload[4]) & 0x00FFFFFF;
914 if( !p_sys->mllt.i_frames_btw_refs || !p_sys->mllt.i_bytes_btw_refs ||
915 !p_sys->mllt.i_ms_btw_refs ||
916 p_payload[8] > 31 || p_payload[9] > 31 || /* bits length sanity check */
917 ((p_payload[8] + p_payload[9]) % 4) || p_payload[8] + p_payload[9] < 4 )
918 return VLC_EGENERIC;
919 p_sys->mllt.i_bits_per_bytes_dev = p_payload[8];
920 p_sys->mllt.i_bits_per_ms_dev = p_payload[9];
921 p_sys->mllt.p_bits = malloc(i_payload - 10);
922 if( likely(p_sys->mllt.p_bits) )
923 {
924 p_sys->mllt.i_bits = i_payload - 10;
925 memcpy(p_sys->mllt.p_bits, &p_payload[10], p_sys->mllt.i_bits);
926 msg_Dbg(p_demux, "read MLLT sync table with %zu entries",
927 (p_sys->mllt.i_bits * 8) / (p_sys->mllt.i_bits_per_bytes_dev + p_sys->mllt.i_bits_per_ms_dev) );
928 }
929 }
930 return VLC_EGENERIC;
931 }
932 else if( i_tag == VLC_FOURCC('T', 'X', 'X', 'X') )
933 {
934 vlc_meta_t *p_meta = vlc_meta_New();
935 if( p_meta )
936 {
937 bool b_updated;
938 if( ID3HandleTag( p_payload, i_payload, i_tag, p_meta, &b_updated ) )
939 {
940 char ** ppsz_keys = vlc_meta_CopyExtraNames( p_meta );
941 if( ppsz_keys )
942 {
943 for( size_t i = 0; ppsz_keys[i]; ++i )
944 {
945 float *pf = NULL;
946 if( !strcasecmp( ppsz_keys[i], "REPLAYGAIN_TRACK_GAIN" ) )
947 pf = &p_sys->rgf_replay_gain[AUDIO_REPLAY_GAIN_TRACK];
948 else if( !strcasecmp( ppsz_keys[i], "REPLAYGAIN_TRACK_PEAK" ) )
949 pf = &p_sys->rgf_replay_peak[AUDIO_REPLAY_GAIN_TRACK];
950 else if( !strcasecmp( ppsz_keys[i], "REPLAYGAIN_ALBUM_GAIN" ) )
951 pf = &p_sys->rgf_replay_gain[AUDIO_REPLAY_GAIN_ALBUM];
952 else if( !strcasecmp( ppsz_keys[i], "REPLAYGAIN_ALBUM_PEAK" ) )
953 pf = &p_sys->rgf_replay_peak[AUDIO_REPLAY_GAIN_ALBUM];
954 if( pf )
955 {
956 const char *psz_val = vlc_meta_GetExtra( p_meta, ppsz_keys[i] );
957 if( psz_val )
958 *pf = us_atof( psz_val );
959 }
960 free( ppsz_keys[i] );
961 }
962 free( ppsz_keys );
963 }
964 }
965 vlc_meta_Delete( p_meta );
966 }
967 }
968
969 return VLC_SUCCESS;
970 }
971
972 static int ID3Parse( demux_t *p_demux,
973 int (*pf_callback)(uint32_t, const uint8_t *, size_t, void *) )
974 {
975 const block_t *p_tags = NULL;
976
977 if( vlc_stream_Control( p_demux->s, STREAM_GET_TAGS, &p_tags ) != VLC_SUCCESS )
978 return VLC_EGENERIC;
979
980 for( ; p_tags; p_tags = p_tags->p_next )
981 ID3TAG_Parse( p_tags->p_buffer, p_tags->i_buffer, pf_callback, (void *) p_demux );
982
983 return VLC_SUCCESS;
984 }
985
986 static int MpgaInit( demux_t *p_demux )
987 {
988 demux_sys_t *p_sys = p_demux->p_sys;
989
990 const uint8_t *p_peek;
991 int i_peek;
992
993 /* */
994 p_sys->i_packet_size = 1024;
995
996 ID3Parse( p_demux, ID3TAG_Parse_Handler );
997
998 /* Load a potential xing header */
999 i_peek = vlc_stream_Peek( p_demux->s, &p_peek, 4 + 1024 );
1000 if( i_peek < 4 + 21 )
1001 return VLC_SUCCESS;
1002
1003 const uint32_t header = GetDWBE( p_peek );
1004 if( !MpgaCheckSync( p_peek ) )
1005 return VLC_SUCCESS;
1006
1007 /* Xing header */
1008 const uint8_t *p_xing = p_peek;
1009 int i_xing = i_peek;
1010 int i_skip;
1011
1012 if( MPGA_VERSION( header ) == 0 )
1013 i_skip = MPGA_MODE( header ) != 3 ? 36 : 21;
1014 else
1015 i_skip = MPGA_MODE( header ) != 3 ? 21 : 13;
1016
1017 if( i_skip + 8 >= i_xing || memcmp( &p_xing[i_skip], "Xing", 4 ) )
1018 return VLC_SUCCESS;
1019
1020 const uint32_t i_flags = GetDWBE( &p_xing[i_skip+4] );
1021
1022 MpgaXingSkip( &p_xing, &i_xing, i_skip + 8 );
1023
1024 if( i_flags&0x01 )
1025 p_sys->xing.i_frames = MpgaXingGetDWBE( &p_xing, &i_xing, 0 );
1026 if( i_flags&0x02 )
1027 p_sys->xing.i_bytes = MpgaXingGetDWBE( &p_xing, &i_xing, 0 );
1028 if( i_flags&0x04 ) /* TODO Support XING TOC to improve seeking accuracy */
1029 MpgaXingSkip( &p_xing, &i_xing, 100 );
1030 if( i_flags&0x08 )
1031 {
1032 /* FIXME: doesn't return the right bitrage average, at least
1033 with some MP3's */
1034 p_sys->xing.i_bitrate_avg = MpgaXingGetDWBE( &p_xing, &i_xing, 0 );
1035 msg_Dbg( p_demux, "xing vbr value present (%d)",
1036 p_sys->xing.i_bitrate_avg );
1037 }
1038
1039 if( p_sys->xing.i_frames > 0 && p_sys->xing.i_bytes > 0 )
1040 {
1041 p_sys->xing.i_frame_samples = MpgaGetFrameSamples( header );
1042 msg_Dbg( p_demux, "xing frames&bytes value present "
1043 "(%d bytes, %d frames, %d samples/frame)",
1044 p_sys->xing.i_bytes, p_sys->xing.i_frames,
1045 p_sys->xing.i_frame_samples );
1046 }
1047
1048 if( i_xing >= 20 && memcmp( p_xing, "LAME", 4 ) == 0)
1049 {
1050 p_sys->xing.b_lame = true;
1051 lame_extra_t *p_lame = &p_sys->xing.lame;
1052
1053 memcpy( p_lame->psz_version, p_xing, 9 );
1054 p_lame->psz_version[9] = '\0';
1055
1056 MpgaXingSkip( &p_xing, &i_xing, 9 );
1057 MpgaXingSkip( &p_xing, &i_xing, 1 ); /* rev_method */
1058
1059 p_lame->i_lowpass = (*p_xing) * 100;
1060 MpgaXingSkip( &p_xing, &i_xing, 1 );
1061
1062 uint32_t peak = MpgaXingGetDWBE( &p_xing, &i_xing, 0 );
1063 uint16_t track = MpgaXingGetWBE( &p_xing, &i_xing, 0 );
1064 uint16_t album = MpgaXingGetWBE( &p_xing, &i_xing, 0 );
1065
1066 p_sys->rgf_replay_peak[AUDIO_REPLAY_GAIN_TRACK] = (float) MpgaXingLameConvertPeak( peak );
1067 p_sys->rgf_replay_gain[AUDIO_REPLAY_GAIN_TRACK] = (float) MpgaXingLameConvertGain( track );
1068 p_sys->rgf_replay_gain[AUDIO_REPLAY_GAIN_ALBUM] = (float) MpgaXingLameConvertGain( album );
1069
1070 MpgaXingSkip( &p_xing, &i_xing, 1 ); /* flags */
1071 }
1072
1073 return VLC_SUCCESS;
1074 }
1075
1076 /*****************************************************************************
1077 * AAC
1078 *****************************************************************************/
1079 static int AacProbe( demux_t *p_demux, uint64_t *pi_offset )
1080 {
1081 bool b_forced;
1082 bool b_forced_demux;
1083
1084 uint64_t i_offset;
1085 const uint8_t *p_peek;
1086
1087 b_forced = demux_IsPathExtension( p_demux, ".aac" ) ||
1088 demux_IsPathExtension( p_demux, ".aacp" );
1089 b_forced_demux = demux_IsForced( p_demux, "m4a" ) ||
1090 demux_IsForced( p_demux, "aac" ) ||
1091 demux_IsForced( p_demux, "mp4a" );
1092
1093 if( !b_forced_demux && !b_forced )
1094 return VLC_EGENERIC;
1095
1096 i_offset = vlc_stream_Tell( p_demux->s );
1097
1098 /* peek the begining (10 is for adts header) */
1099 if( vlc_stream_Peek( p_demux->s, &p_peek, 10 ) < 10 )
1100 {
1101 msg_Dbg( p_demux, "cannot peek" );
1102 return VLC_EGENERIC;
1103 }
1104 if( !strncmp( (char *)p_peek, "ADIF", 4 ) )
1105 {
1106 msg_Err( p_demux, "ADIF file. Not yet supported. (Please report)" );
1107 return VLC_EGENERIC;
1108 }
1109
1110 *pi_offset = i_offset;
1111 return VLC_SUCCESS;
1112 }
1113 static int AacInit( demux_t *p_demux )
1114 {
1115 demux_sys_t *p_sys = p_demux->p_sys;
1116
1117 p_sys->i_packet_size = 4096;
1118 p_sys->i_original = VLC_FOURCC('H','E','A','D');
1119
1120 return VLC_SUCCESS;
1121 }
1122
1123
1124 /*****************************************************************************
1125 * A52
1126 *****************************************************************************/
1127 static int A52CheckSync( const uint8_t *p_peek, bool *p_big_endian, unsigned *pi_samples, bool b_eac3 )
1128 {
1129 vlc_a52_header_t header;
1130 uint8_t p_tmp[VLC_A52_MIN_HEADER_SIZE];
1131
1132 *p_big_endian = p_peek[0] == 0x0b && p_peek[1] == 0x77;
1133 if( !*p_big_endian )
1134 {
1135 swab( p_peek, p_tmp, VLC_A52_MIN_HEADER_SIZE );
1136 p_peek = p_tmp;
1137 }
1138
1139 if( vlc_a52_header_Parse( &header, p_peek, VLC_A52_MIN_HEADER_SIZE ) )
1140 return VLC_EGENERIC;
1141
1142 if( !header.b_eac3 != !b_eac3 )
1143 return VLC_EGENERIC;
1144 if( pi_samples )
1145 *pi_samples = header.i_samples;
1146 return header.i_size;
1147 }
1148 static int EA52CheckSyncProbe( const uint8_t *p_peek, unsigned *pi_samples )
1149 {
1150 bool b_dummy;
1151 return A52CheckSync( p_peek, &b_dummy, pi_samples, true );
1152 }
1153
1154 static int EA52Probe( demux_t *p_demux, uint64_t *pi_offset )
1155 {
1156 const char *ppsz_name[] = { "eac3", NULL };
1157 const uint16_t rgi_twocc[] = { WAVE_FORMAT_PCM, WAVE_FORMAT_A52, WAVE_FORMAT_UNKNOWN };
1158
1159 return GenericProbe( p_demux, pi_offset, ppsz_name, EA52CheckSyncProbe,
1160 VLC_A52_MIN_HEADER_SIZE,
1161 1920 + VLC_A52_MIN_HEADER_SIZE + 1,
1162 WAV_EXTRA_PROBE_SIZE,
1163 true, rgi_twocc, GenericFormatCheck );
1164 }
1165
1166 static int A52CheckSyncProbe( const uint8_t *p_peek, unsigned *pi_samples )
1167 {
1168 bool b_dummy;
1169 return A52CheckSync( p_peek, &b_dummy, pi_samples, false );
1170 }
1171
1172 static int A52Probe( demux_t *p_demux, uint64_t *pi_offset )
1173 {
1174 const char *ppsz_name[] = { "a52", "ac3", NULL };
1175 const uint16_t rgi_twocc[] = { WAVE_FORMAT_PCM, WAVE_FORMAT_A52, WAVE_FORMAT_UNKNOWN };
1176
1177 return GenericProbe( p_demux, pi_offset, ppsz_name, A52CheckSyncProbe,
1178 VLC_A52_MIN_HEADER_SIZE,
1179 1920 + VLC_A52_MIN_HEADER_SIZE + 1,
1180 WAV_EXTRA_PROBE_SIZE,
1181 true, rgi_twocc, GenericFormatCheck );
1182 }
1183
1184 static int A52Init( demux_t *p_demux )
1185 {
1186 demux_sys_t *p_sys = p_demux->p_sys;
1187
1188 p_sys->b_big_endian = false;
1189 p_sys->i_packet_size = 1024;
1190
1191 const uint8_t *p_peek;
1192
1193 /* peek the begining */
1194 if( vlc_stream_Peek( p_demux->s, &p_peek, VLC_A52_MIN_HEADER_SIZE ) >= VLC_A52_MIN_HEADER_SIZE )
1195 {
1196 A52CheckSync( p_peek, &p_sys->b_big_endian, NULL, true );
1197 }
1198 return VLC_SUCCESS;
1199 }
1200
1201 /*****************************************************************************
1202 * DTS
1203 *****************************************************************************/
1204 static int DtsCheckSync( const uint8_t *p_peek, unsigned *pi_samples )
1205 {
1206 VLC_UNUSED(pi_samples);
1207
1208 vlc_dts_header_t dts;
1209 if( vlc_dts_header_Parse( &dts, p_peek, VLC_DTS_HEADER_SIZE ) == VLC_SUCCESS
1210 && dts.i_frame_size > 0 && dts.i_frame_size <= 8192 )
1211 {
1212 if( pi_samples )
1213 *pi_samples = dts.i_frame_length;
1214 return dts.i_frame_size;
1215 }
1216 else
1217 return VLC_EGENERIC;
1218 }
1219
1220 static int DtsProbe( demux_t *p_demux, uint64_t *pi_offset )
1221 {
1222 const char *ppsz_name[] = { "dts", NULL };
1223 const uint16_t rgi_twocc[] = { WAVE_FORMAT_PCM, WAVE_FORMAT_DTS, WAVE_FORMAT_UNKNOWN };
1224
1225 return GenericProbe( p_demux, pi_offset, ppsz_name, DtsCheckSync,
1226 VLC_DTS_HEADER_SIZE,
1227 16384 + VLC_DTS_HEADER_SIZE + 1,
1228 WAV_EXTRA_PROBE_SIZE,
1229 false, rgi_twocc, NULL );
1230 }
1231 static int DtsInit( demux_t *p_demux )
1232 {
1233 demux_sys_t *p_sys = p_demux->p_sys;
1234
1235 p_sys->i_packet_size = 16384;
1236
1237 return VLC_SUCCESS;
1238 }
1239
1240 /*****************************************************************************
1241 * MLP
1242 *****************************************************************************/
1243 static int MlpCheckSync( const uint8_t *p_peek, unsigned *pi_samples )
1244 {
1245 if( p_peek[4+0] != 0xf8 || p_peek[4+1] != 0x72 || p_peek[4+2] != 0x6f )
1246 return -1;
1247
1248 if( p_peek[4+3] != 0xbb )
1249 return -1;
1250
1251 /* TODO checksum and real size for robustness */
1252 VLC_UNUSED(pi_samples);
1253 return 0;
1254 }
1255 static int ThdCheckSync( const uint8_t *p_peek, unsigned *pi_samples )
1256 {
1257 if( p_peek[4+0] != 0xf8 || p_peek[4+1] != 0x72 || p_peek[4+2] != 0x6f )
1258 return -1;
1259
1260 if( p_peek[4+3] != 0xba )
1261 return -1;
1262
1263 /* TODO checksum and real size for robustness */
1264 VLC_UNUSED(pi_samples);
1265 return 0;
1266 }
1267 static int MlpProbe( demux_t *p_demux, uint64_t *pi_offset )
1268 {
1269 const char *ppsz_name[] = { "mlp", NULL };
1270 const uint16_t rgi_twocc[] = { WAVE_FORMAT_PCM, WAVE_FORMAT_UNKNOWN };
1271
1272 return GenericProbe( p_demux, pi_offset, ppsz_name, MlpCheckSync,
1273 4+28+16*4, BASE_PROBE_SIZE, WAV_EXTRA_PROBE_SIZE,
1274 false, rgi_twocc, GenericFormatCheck );
1275 }
1276 static int ThdProbe( demux_t *p_demux, uint64_t *pi_offset )
1277 {
1278 const char *ppsz_name[] = { "thd", NULL };
1279 const uint16_t rgi_twocc[] = { WAVE_FORMAT_PCM, WAVE_FORMAT_UNKNOWN };
1280
1281 return GenericProbe( p_demux, pi_offset, ppsz_name, ThdCheckSync,
1282 4+28+16*4, BASE_PROBE_SIZE, WAV_EXTRA_PROBE_SIZE,
1283 false, rgi_twocc, GenericFormatCheck );
1284 }
1285 static int MlpInit( demux_t *p_demux )
1286
1287 {
1288 demux_sys_t *p_sys = p_demux->p_sys;
1289
1290 p_sys->i_packet_size = 4096;
1291
1292 return VLC_SUCCESS;
1293 }
1294
1295 /*****************************************************************************
1296 * Video
1297 *****************************************************************************/
1298 static int VideoInit( demux_t *p_demux )
1299 {
1300 demux_sys_t *p_sys = p_demux->p_sys;
1301
1302 p_sys->i_packet_size = 4096;
1303
1304 return VLC_SUCCESS;
1305 }
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