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demux: mp4: avoid audio cuts on seek
[vlc.git] / modules / mux / mpeg / ps.c
blobbba06f824d5f624cc5451b2493aa0373dbf6e7fb
1 /*****************************************************************************
2 * ps.c: MPEG PS (ISO/IEC 13818-1) / MPEG SYSTEM (ISO/IEC 1172-1)
3 * multiplexer module for vlc
4 *****************************************************************************
5 * Copyright (C) 2001, 2002 VLC authors and VideoLAN
6 * $Id$
7 *
8 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * Eric Petit <titer@videolan.org>
10 * Gildas Bazin <gbazin@videolan.org>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU Lesser General Public License as published by
14 * the Free Software Foundation; either version 2.1 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Lesser General Public License for more details.
21 *
22 * You should have received a copy of the GNU Lesser General Public License
23 * along with this program; if not, write to the Free Software Foundation,
24 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
26
27 /*****************************************************************************
28 * Preamble
29 *****************************************************************************/
30
31 #ifdef HAVE_CONFIG_H
32 # include "config.h"
33 #endif
34
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37 #include <vlc_sout.h>
38 #include <vlc_block.h>
39
40 #include "bits.h"
41 #include "pes.h"
42
43 #include <vlc_iso_lang.h>
44
45 /*****************************************************************************
46 * Module descriptor
47 *****************************************************************************/
48 #define DTS_TEXT N_("DTS delay (ms)")
49 #define DTS_LONGTEXT N_("Delay the DTS (decoding time " \
50 "stamps) and PTS (presentation timestamps) of the data in the " \
51 "stream, compared to the SCRs. This allows for some buffering inside " \
52 "the client decoder.")
53
54 #define PES_SIZE_TEXT N_("PES maximum size")
55 #define PES_SIZE_LONGTEXT N_("Set the maximum allowed PES "\
56 "size when producing the MPEG PS streams.")
57
58 static int Open ( vlc_object_t * );
59 static void Close ( vlc_object_t * );
60
61 #define SOUT_CFG_PREFIX "sout-ps-"
62
63 vlc_module_begin ()
64 set_description( N_("PS muxer") )
65 set_shortname( "MPEG-PS" )
66 set_category( CAT_SOUT )
67 set_subcategory( SUBCAT_SOUT_MUX )
68 set_capability( "sout mux", 50 )
69 add_shortcut( "ps", "mpeg1", "dvd" )
70 set_callbacks( Open, Close )
71
72 add_integer( SOUT_CFG_PREFIX "dts-delay", 200, DTS_TEXT,
73 DTS_LONGTEXT, true )
74 add_integer( SOUT_CFG_PREFIX "pes-max-size", PES_PAYLOAD_SIZE_MAX,
75 PES_SIZE_TEXT, PES_SIZE_LONGTEXT, true )
76 vlc_module_end ()
77
78 /*****************************************************************************
79 * Exported prototypes
80 *****************************************************************************/
81 static int Control ( sout_mux_t *, int, va_list );
82 static int AddStream( sout_mux_t *, sout_input_t * );
83 static void DelStream( sout_mux_t *, sout_input_t * );
84 static int Mux ( sout_mux_t * );
85
86 /*****************************************************************************
87 * Local prototypes
88 *****************************************************************************/
89
90 static void MuxWritePackHeader ( sout_mux_t *, block_t **, mtime_t );
91 static void MuxWriteSystemHeader( sout_mux_t *, block_t **, mtime_t );
92 static void MuxWritePSM ( sout_mux_t *, block_t **, mtime_t );
93
94 static void StreamIdInit ( bool *id, int i_range );
95 static int StreamIdGet ( bool *id, int i_id_min, int i_id_max );
96 static void StreamIdRelease ( bool *id, int i_id_min, int i_id );
97
98 typedef struct ps_stream_s
99 {
100 int i_stream_id;
101 int i_stream_type;
102 int i_max_buff_size; /* used in system header */
103
104 /* Language is iso639-2T */
105 uint8_t lang[3];
106
107 } ps_stream_t;
108
109 struct sout_mux_sys_t
110 {
111 /* Which id are unused */
112 bool stream_id_mpga[16]; /* 0xc0 -> 0xcf */
113 bool stream_id_mpgv[16]; /* 0xe0 -> 0xef */
114 bool stream_id_a52[8]; /* 0x80 -> 0x87 <- FIXME I'm not sure */
115 bool stream_id_spu[32]; /* 0x20 -> 0x3f */
116 bool stream_id_dts[8]; /* 0x88 -> 0x8f */
117 bool stream_id_lpcm[16]; /* 0xa0 -> 0xaf */
118
119 int i_audio_bound;
120 int i_video_bound;
121 int i_pes_count;
122 int i_system_header;
123 int i_dts_delay;
124 int i_rate_bound; /* units of 50 bytes/second */
125
126 int64_t i_instant_bitrate;
127 int64_t i_instant_size;
128 int64_t i_instant_dts;
129
130 bool b_mpeg2;
131
132 int i_pes_max_size;
133
134 int i_psm_version;
135 uint32_t crc32_table[256];
136 };
137
138 static const char *const ppsz_sout_options[] = {
139 "dts-delay", "pes-max-size", NULL
140 };
141
142 /*****************************************************************************
143 * Open:
144 *****************************************************************************/
145 static int Open( vlc_object_t *p_this )
146 {
147 sout_mux_t *p_mux = (sout_mux_t*)p_this;
148 sout_mux_sys_t *p_sys;
149 vlc_value_t val;
150
151 msg_Info( p_mux, "Open" );
152 config_ChainParse( p_mux, SOUT_CFG_PREFIX, ppsz_sout_options, p_mux->p_cfg );
153
154 p_mux->pf_control = Control;
155 p_mux->pf_addstream = AddStream;
156 p_mux->pf_delstream = DelStream;
157 p_mux->pf_mux = Mux;
158 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
159
160 /* Init free stream id */
161 StreamIdInit( p_sys->stream_id_a52, 8 );
162 StreamIdInit( p_sys->stream_id_dts, 8 );
163 StreamIdInit( p_sys->stream_id_mpga, 16 );
164 StreamIdInit( p_sys->stream_id_mpgv, 16 );
165 StreamIdInit( p_sys->stream_id_lpcm, 16 );
166 StreamIdInit( p_sys->stream_id_spu, 32 );
167
168 p_sys->i_audio_bound = 0;
169 p_sys->i_video_bound = 0;
170 p_sys->i_system_header = 0;
171 p_sys->i_pes_count = 0;
172
173 p_sys->i_psm_version = 0;
174
175 p_sys->i_instant_bitrate = 0;
176 p_sys->i_instant_size = 0;
177 p_sys->i_instant_dts = 0;
178 p_sys->i_rate_bound = 0;
179 p_sys->b_mpeg2 = !(p_mux->psz_mux && !strcmp( p_mux->psz_mux, "mpeg1" ));
180
181 var_Get( p_mux, SOUT_CFG_PREFIX "dts-delay", &val );
182 p_sys->i_dts_delay = (int64_t)val.i_int * 1000;
183
184 var_Get( p_mux, SOUT_CFG_PREFIX "pes-max-size", &val );
185 p_sys->i_pes_max_size = (int64_t)val.i_int;
186
187 /* Initialise CRC32 table */
188 if( p_sys->b_mpeg2 )
189 {
190 uint32_t i, j, k;
191
192 for( i = 0; i < 256; i++ )
193 {
194 k = 0;
195 for( j = (i << 24) | 0x800000; j != 0x80000000; j <<= 1 )
196 k = (k << 1) ^ (((k ^ j) & 0x80000000) ? 0x04c11db7 : 0);
197
198 p_sys->crc32_table[i] = k;
199 }
200 }
201
202 return VLC_SUCCESS;
203 }
204
205 /*****************************************************************************
206 * Close:
207 *****************************************************************************/
208 static void Close( vlc_object_t * p_this )
209 {
210 sout_mux_t *p_mux = (sout_mux_t*)p_this;
211 sout_mux_sys_t *p_sys = p_mux->p_sys;
212
213 block_t *p_end;
214
215 msg_Info( p_mux, "Close" );
216
217 p_end = block_Alloc( 4 );
218 p_end->p_buffer[0] = 0x00; p_end->p_buffer[1] = 0x00;
219 p_end->p_buffer[2] = 0x01; p_end->p_buffer[3] = 0xb9;
220
221 sout_AccessOutWrite( p_mux->p_access, p_end );
222
223 free( p_sys );
224 }
225
226 /*****************************************************************************
227 * Control:
228 *****************************************************************************/
229 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
230 {
231 VLC_UNUSED(p_mux);
232 bool *pb_bool;
233 char **ppsz;
234
235 switch( i_query )
236 {
237 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
238 pb_bool = va_arg( args, bool * );
239 *pb_bool = true;
240 return VLC_SUCCESS;
241
242 case MUX_GET_ADD_STREAM_WAIT:
243 pb_bool = va_arg( args, bool * );
244 *pb_bool = false;
245 return VLC_SUCCESS;
246
247 case MUX_GET_MIME:
248 ppsz = va_arg( args, char ** );
249 *ppsz = strdup( "video/mpeg" );
250 return VLC_SUCCESS;
251
252 default:
253 return VLC_EGENERIC;
254 }
255 }
256
257 /*****************************************************************************
258 * AddStream:
259 *****************************************************************************/
260 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
261 {
262 sout_mux_sys_t *p_sys = p_mux->p_sys;
263 ps_stream_t *p_stream;
264
265
266 msg_Dbg( p_mux, "adding input codec=%4.4s",
267 (char*)&p_input->p_fmt->i_codec );
268
269 p_input->p_sys = p_stream = malloc( sizeof( ps_stream_t ) );
270 if( unlikely(p_input->p_sys == NULL) )
271 return VLC_ENOMEM;
272 p_stream->i_stream_type = 0x81;
273
274 /* Init this new stream */
275 switch( p_input->p_fmt->i_codec )
276 {
277 case VLC_CODEC_MPGV:
278 case VLC_CODEC_MP2V:
279 case VLC_CODEC_MP1V:
280 p_stream->i_stream_id =
281 StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
282 p_stream->i_stream_type = 0x02; /* ISO/IEC 13818 Video */
283 break;
284 case VLC_CODEC_MP4V:
285 p_stream->i_stream_id =
286 StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
287 p_stream->i_stream_type = 0x10;
288 break;
289 case VLC_CODEC_H264:
290 p_stream->i_stream_id =
291 StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
292 p_stream->i_stream_type = 0x1b;
293 break;
294 case VLC_CODEC_DVD_LPCM:
295 p_stream->i_stream_id =
296 0xbd00 | StreamIdGet( p_sys->stream_id_lpcm, 0xa0, 0xaf );
297 break;
298 case VLC_CODEC_DTS:
299 p_stream->i_stream_id =
300 0xbd00 | StreamIdGet( p_sys->stream_id_dts, 0x88, 0x8f );
301 break;
302 case VLC_CODEC_A52:
303 p_stream->i_stream_id =
304 0xbd00 | StreamIdGet( p_sys->stream_id_a52, 0x80, 0x87 );
305 break;
306 case VLC_CODEC_MPGA:
307 p_stream->i_stream_id =
308 StreamIdGet( p_sys->stream_id_mpga, 0xc0, 0xcf );
309 p_stream->i_stream_type = 0x03; /* ISO/IEC 11172 Audio */
310 break;
311 case VLC_CODEC_MP4A:
312 p_stream->i_stream_id =
313 StreamIdGet( p_sys->stream_id_mpga, 0xc0, 0xcf );
314 p_stream->i_stream_type = 0x0f;
315 break;
316 case VLC_CODEC_SPU:
317 p_stream->i_stream_id =
318 0xbd00 | StreamIdGet( p_sys->stream_id_spu, 0x20, 0x3f );
319 break;
320 default:
321 goto error;
322 }
323
324 if( p_stream->i_stream_id < 0 ) goto error;
325
326 if( p_input->p_fmt->i_cat == AUDIO_ES )
327 {
328 p_sys->i_audio_bound++;
329 p_stream->i_max_buff_size = 4 * 1024;
330 }
331 else if( p_input->p_fmt->i_cat == VIDEO_ES )
332 {
333 p_sys->i_video_bound++;
334 p_stream->i_max_buff_size = 400 * 1024; /* FIXME -- VCD uses 46, SVCD
335 uses 230, ffmpeg has 230 with a note that it is small */
336 }
337 else
338 { /* FIXME -- what's valid for not audio or video? */
339 p_stream->i_max_buff_size = 4 * 1024;
340 }
341
342 /* Try to set a sensible default value for the instant bitrate */
343 p_sys->i_instant_bitrate += p_input->p_fmt->i_bitrate + 1000/* overhead */;
344
345 /* FIXME -- spec requires an upper limit rate boundary in the system header;
346 our codecs are VBR; using 2x nominal rate, convert to 50 bytes/sec */
347 p_sys->i_rate_bound += p_input->p_fmt->i_bitrate * 2 / (8 * 50);
348 p_sys->i_psm_version++;
349
350 p_stream->lang[0] = p_stream->lang[1] = p_stream->lang[2] = 0;
351 if( p_input->p_fmt->psz_language )
352 {
353 char *psz = p_input->p_fmt->psz_language;
354 const iso639_lang_t *pl = NULL;
355
356 if( strlen( psz ) == 2 )
357 {
358 pl = GetLang_1( psz );
359 }
360 else if( strlen( psz ) == 3 )
361 {
362 pl = GetLang_2B( psz );
363 if( !strcmp( pl->psz_iso639_1, "??" ) )
364 {
365 pl = GetLang_2T( psz );
366 }
367 }
368 if( pl && strcmp( pl->psz_iso639_1, "??" ) )
369 {
370 p_stream->lang[0] = pl->psz_iso639_2T[0];
371 p_stream->lang[1] = pl->psz_iso639_2T[1];
372 p_stream->lang[2] = pl->psz_iso639_2T[2];
373
374 msg_Dbg( p_mux, " - lang=%c%c%c",
375 p_stream->lang[0], p_stream->lang[1], p_stream->lang[2] );
376 }
377 }
378 return VLC_SUCCESS;
379
380 error:
381 free( p_stream );
382 return VLC_EGENERIC;
383 }
384
385 /*****************************************************************************
386 * DelStream:
387 *****************************************************************************/
388 static void DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
389 {
390 sout_mux_sys_t *p_sys = p_mux->p_sys;
391 ps_stream_t *p_stream =(ps_stream_t*)p_input->p_sys;
392
393 msg_Dbg( p_mux, "removing input" );
394 switch( p_input->p_fmt->i_codec )
395 {
396 case VLC_CODEC_MPGV:
397 StreamIdRelease( p_sys->stream_id_mpgv, 0xe0,
398 p_stream->i_stream_id );
399 break;
400 case VLC_CODEC_DVD_LPCM:
401 StreamIdRelease( p_sys->stream_id_lpcm, 0xa0,
402 p_stream->i_stream_id&0xff );
403 break;
404 case VLC_CODEC_DTS:
405 StreamIdRelease( p_sys->stream_id_dts, 0x88,
406 p_stream->i_stream_id&0xff );
407 break;
408 case VLC_CODEC_A52:
409 StreamIdRelease( p_sys->stream_id_a52, 0x80,
410 p_stream->i_stream_id&0xff );
411 break;
412 case VLC_CODEC_MPGA:
413 StreamIdRelease( p_sys->stream_id_mpga, 0xc0,
414 p_stream->i_stream_id );
415 break;
416 case VLC_CODEC_SPU:
417 StreamIdRelease( p_sys->stream_id_spu, 0x20,
418 p_stream->i_stream_id&0xff );
419 break;
420 default:
421 /* Never reached */
422 break;
423 }
424
425 if( p_input->p_fmt->i_cat == AUDIO_ES )
426 {
427 p_sys->i_audio_bound--;
428 }
429 else if( p_input->p_fmt->i_cat == VIDEO_ES )
430 {
431 p_sys->i_video_bound--;
432 }
433
434 /* Try to set a sensible default value for the instant bitrate */
435 p_sys->i_instant_bitrate -= (p_input->p_fmt->i_bitrate + 1000);
436 /* rate_bound is in units of 50 bytes/second */
437 p_sys->i_rate_bound -= (p_input->p_fmt->i_bitrate * 2)/(8 * 50);
438
439 p_sys->i_psm_version++;
440
441 free( p_stream );
442 }
443
444 /*****************************************************************************
445 * Mux: Call each time there is new data for at least one stream
446 *****************************************************************************/
447 static int Mux( sout_mux_t *p_mux )
448 {
449 sout_mux_sys_t *p_sys = p_mux->p_sys;
450
451 for( ;; )
452 {
453 sout_input_t *p_input;
454 ps_stream_t *p_stream;
455
456 block_t *p_ps, *p_data;
457
458 mtime_t i_dts;
459
460 /* Choose which stream to mux */
461 int i_stream = sout_MuxGetStream( p_mux, 1, &i_dts );
462 if( i_stream < 0 )
463 {
464 return VLC_SUCCESS;
465 }
466
467 p_input = p_mux->pp_inputs[i_stream];
468 p_stream = (ps_stream_t*)p_input->p_sys;
469 p_ps = NULL;
470
471 /* Write regulary PackHeader */
472 if( p_sys->i_pes_count % 30 == 0)
473 {
474 /* Update the instant bitrate every second or so */
475 if( p_sys->i_instant_size &&
476 i_dts - p_sys->i_instant_dts > 1000000 )
477 {
478 int64_t i_instant_bitrate = p_sys->i_instant_size * 8000000 /
479 ( i_dts - p_sys->i_instant_dts );
480
481 p_sys->i_instant_bitrate += i_instant_bitrate;
482 p_sys->i_instant_bitrate /= 2;
483
484 p_sys->i_instant_size = 0;
485 p_sys->i_instant_dts = i_dts;
486 }
487 else if( !p_sys->i_instant_size )
488 {
489 p_sys->i_instant_dts = i_dts;
490 }
491
492 MuxWritePackHeader( p_mux, &p_ps, i_dts );
493 }
494
495 /* Write regulary SystemHeader */
496 if( p_sys->i_pes_count % 300 == 0 )
497 {
498 block_t *p_pk;
499
500 MuxWriteSystemHeader( p_mux, &p_ps, i_dts );
501
502 /* For MPEG1 streaming, set HEADER flag */
503 for( p_pk = p_ps; p_pk != NULL; p_pk = p_pk->p_next )
504 {
505 p_pk->i_flags |= BLOCK_FLAG_HEADER;
506 }
507 }
508
509 /* Write regulary ProgramStreamMap */
510 if( p_sys->b_mpeg2 && p_sys->i_pes_count % 300 == 0 )
511 {
512 MuxWritePSM( p_mux, &p_ps, i_dts );
513 }
514
515 /* Get and mux a packet */
516 p_data = block_FifoGet( p_input->p_fifo );
517 EStoPES ( &p_data, p_input->p_fmt, p_stream->i_stream_id,
518 p_sys->b_mpeg2, 0, 0, p_sys->i_pes_max_size, 0 );
519
520 block_ChainAppend( &p_ps, p_data );
521
522 /* Get size of output data so we can calculate the instant bitrate */
523 for( p_data = p_ps; p_data; p_data = p_data->p_next )
524 {
525 p_sys->i_instant_size += p_data->i_buffer;
526 }
527
528 sout_AccessOutWrite( p_mux->p_access, p_ps );
529
530 /* Increase counter */
531 p_sys->i_pes_count++;
532 }
533
534 return VLC_SUCCESS;
535 }
536
537 /*****************************************************************************
538 *
539 *****************************************************************************/
540 static void StreamIdInit( bool *id, int i_range )
541 {
542 int i;
543
544 for( i = 0; i < i_range; i++ )
545 {
546 id[i] = true;
547 }
548 }
549 static int StreamIdGet( bool *id, int i_id_min, int i_id_max )
550 {
551 int i;
552
553 for( i = 0; i <= i_id_max - i_id_min; i++ )
554 {
555 if( id[i] )
556 {
557 id[i] = false;
558
559 return i_id_min + i;
560 }
561 }
562 return -1;
563 }
564 static void StreamIdRelease( bool *id, int i_id_min, int i_id )
565 {
566 id[i_id - i_id_min] = true;
567 }
568
569 static void MuxWritePackHeader( sout_mux_t *p_mux, block_t **p_buf,
570 mtime_t i_dts )
571 {
572 sout_mux_sys_t *p_sys = p_mux->p_sys;
573 bits_buffer_t bits;
574 block_t *p_hdr;
575 mtime_t i_scr;
576 int i_mux_rate;
577
578 i_scr = (i_dts - p_sys->i_dts_delay) * 9 / 100;
579
580 p_hdr = block_Alloc( 18 );
581 p_hdr->i_pts = p_hdr->i_dts = i_dts;
582 bits_initwrite( &bits, 14, p_hdr->p_buffer );
583 bits_write( &bits, 32, 0x01ba );
584
585 /* The spec specifies that the mux rate must be rounded upwards */
586 i_mux_rate = (p_sys->i_instant_bitrate + 8 * 50 - 1 ) / (8 * 50);
587
588 if( p_sys->b_mpeg2 )
589 {
590 bits_write( &bits, 2, 0x01 );
591 }
592 else
593 {
594 bits_write( &bits, 4, 0x02 );
595 }
596
597 bits_write( &bits, 3, ( i_scr >> 30 )&0x07 );
598 bits_write( &bits, 1, 1 ); // marker
599 bits_write( &bits, 15, ( i_scr >> 15 )&0x7fff );
600 bits_write( &bits, 1, 1 ); // marker
601 bits_write( &bits, 15, i_scr&0x7fff );
602 bits_write( &bits, 1, 1 ); // marker
603
604 if( p_sys->b_mpeg2 )
605 {
606 bits_write( &bits, 9, 0 ); // src extension
607 }
608 bits_write( &bits, 1, 1 ); // marker
609
610 bits_write( &bits, 22, i_mux_rate);
611 bits_write( &bits, 1, 1 ); // marker
612
613 if( p_sys->b_mpeg2 )
614 {
615 bits_write( &bits, 1, 1 ); // marker
616 bits_write( &bits, 5, 0x1f ); // reserved
617 bits_write( &bits, 3, 0 ); // stuffing bytes
618 }
619
620 p_hdr->i_buffer = p_sys->b_mpeg2 ? 14: 12;
621
622 block_ChainAppend( p_buf, p_hdr );
623 }
624
625 static void MuxWriteSystemHeader( sout_mux_t *p_mux, block_t **p_buf,
626 mtime_t i_dts )
627 {
628 sout_mux_sys_t *p_sys = p_mux->p_sys;
629 block_t *p_hdr;
630 bits_buffer_t bits;
631 bool b_private;
632 int i_rate_bound;
633
634 int i_nb_private, i_nb_stream;
635 int i;
636
637 /* Count the number of private stream */
638 for( i = 0, i_nb_private = 0; i < p_mux->i_nb_inputs; i++ )
639 {
640 ps_stream_t *p_stream;
641
642 p_stream = (ps_stream_t*)p_mux->pp_inputs[i]->p_sys;
643
644 if( ( p_stream->i_stream_id&0xff00 ) == 0xbd00 )
645 {
646 i_nb_private++;
647 }
648 }
649
650 /* Private stream are declared only one time */
651 i_nb_stream = p_mux->i_nb_inputs -
652 ( i_nb_private > 0 ? i_nb_private - 1 : 0 );
653
654 p_hdr = block_Alloc( 12 + i_nb_stream * 3 );
655 p_hdr->i_dts = p_hdr->i_pts = i_dts;
656
657 /* The spec specifies that the reported rate_bound must be upper limit */
658 i_rate_bound = (p_sys->i_rate_bound);
659
660 bits_initwrite( &bits, 12 + i_nb_stream * 3, p_hdr->p_buffer );
661 bits_write( &bits, 32, 0x01bb );
662 bits_write( &bits, 16, 12 - 6 + i_nb_stream * 3 );
663 bits_write( &bits, 1, 1 ); // marker bit
664 bits_write( &bits, 22, i_rate_bound);
665 bits_write( &bits, 1, 1 ); // marker bit
666
667 bits_write( &bits, 6, p_sys->i_audio_bound );
668 bits_write( &bits, 1, 0 ); // fixed flag
669 bits_write( &bits, 1, 0 ); // CSPS flag
670 bits_write( &bits, 1, 0 ); // system audio lock flag
671 bits_write( &bits, 1, 0 ); // system video lock flag
672
673 bits_write( &bits, 1, 1 ); // marker bit
674
675 bits_write( &bits, 5, p_sys->i_video_bound );
676 bits_write( &bits, 1, 1 ); // packet rate restriction flag (1 for mpeg1)
677 bits_write( &bits, 7, 0xff ); // reserved bits
678
679 /* stream_id table */
680 for( i = 0, b_private = false; i < p_mux->i_nb_inputs; i++ )
681 {
682 sout_input_t *p_input;
683 ps_stream_t *p_stream;
684
685 p_input = p_mux->pp_inputs[i];
686 p_stream = (ps_stream_t *)p_input->p_sys;
687
688 if( ( p_stream->i_stream_id&0xff00 ) == 0xbd00 )
689 {
690 if( b_private )
691 {
692 continue;
693 }
694 b_private = true;
695 /* Write stream id */
696 bits_write( &bits, 8, 0xbd );
697 }
698 else
699 {
700 /* Write stream id */
701 bits_write( &bits, 8, p_stream->i_stream_id&0xff );
702 }
703
704 bits_write( &bits, 2, 0x03 ); /* reserved */
705 if( p_input->p_fmt->i_cat == AUDIO_ES )
706 {
707 bits_write( &bits, 1, 0 );
708 bits_write( &bits, 13, p_stream->i_max_buff_size / 128 );
709 }
710 else if( p_input->p_fmt->i_cat == VIDEO_ES )
711 {
712 bits_write( &bits, 1, 1 );
713 bits_write( &bits, 13, p_stream->i_max_buff_size / 1024);
714 }
715 else
716 {
717 /* FIXME -- the scale of 0 means do a /128 */
718 bits_write( &bits, 1, 0 );
719 bits_write( &bits, 13, p_stream->i_max_buff_size / 128 );
720 }
721 }
722
723 block_ChainAppend( p_buf, p_hdr );
724 }
725
726 static void MuxWritePSM( sout_mux_t *p_mux, block_t **p_buf, mtime_t i_dts )
727 {
728 sout_mux_sys_t *p_sys = p_mux->p_sys;
729 block_t *p_hdr;
730 bits_buffer_t bits;
731 int i, i_psm_size = 16, i_es_map_size = 0;
732
733 for( i = 0; i < p_mux->i_nb_inputs; i++ )
734 {
735 sout_input_t *p_input = p_mux->pp_inputs[i];
736 ps_stream_t *p_stream = p_input->p_sys;
737
738 i_es_map_size += 4;
739 if( p_stream->lang[0] != 0 ) i_es_map_size += 6;
740 }
741
742 i_psm_size += i_es_map_size;
743
744 p_hdr = block_Alloc( i_psm_size );
745 p_hdr->i_dts = p_hdr->i_pts = i_dts;
746
747 memset( p_hdr->p_buffer, 0, p_hdr->i_buffer );
748 bits_initwrite( &bits, i_psm_size, p_hdr->p_buffer );
749 bits_write( &bits, 32, 0x01bc );
750 bits_write( &bits, 16, i_psm_size - 6 );
751 bits_write( &bits, 1, 1 ); /* current_next_indicator */
752 bits_write( &bits, 2, 0xF ); /* reserved */
753 bits_write( &bits, 5, p_sys->i_psm_version );
754 bits_write( &bits, 7, 0xFF ); /* reserved */
755 bits_write( &bits, 1, 1 ); /* marker */
756
757 bits_write( &bits, 16, 0 ); /* program_stream_info_length */
758 /* empty */
759
760 bits_write( &bits, 16, i_es_map_size ); /* elementary_stream_map_length */
761 for( i = 0; i < p_mux->i_nb_inputs; i++ )
762 {
763 sout_input_t *p_input = p_mux->pp_inputs[i];
764 ps_stream_t *p_stream = p_input->p_sys;
765
766 bits_write( &bits, 8, p_stream->i_stream_type ); /* stream_type */
767 bits_write( &bits, 8, p_stream->i_stream_id ); /* elementary_stream_id */
768
769 /* ISO639 language descriptor */
770 if( p_stream->lang[0] != 0 )
771 {
772 bits_write( &bits, 16, 6 ); /* elementary_stream_info_length */
773
774 bits_write( &bits, 8, 0x0a ); /* descriptor_tag */
775 bits_write( &bits, 8, 4 ); /* descriptor_length */
776
777 bits_write( &bits, 8, p_stream->lang[0] );
778 bits_write( &bits, 8, p_stream->lang[1] );
779 bits_write( &bits, 8, p_stream->lang[2] );
780 bits_write( &bits, 8, 0 ); /* audio type: 0x00 undefined */
781 }
782 else
783 {
784 bits_write( &bits, 16, 0 ); /* elementary_stream_info_length */
785 }
786 }
787
788 /* CRC32 */
789 {
790 uint32_t i_crc = 0xffffffff;
791 for( i = 0; (size_t)i < p_hdr->i_buffer; i++ )
792 i_crc = (i_crc << 8) ^
793 p_sys->crc32_table[((i_crc >> 24) ^ p_hdr->p_buffer[i]) & 0xff];
794
795 bits_write( &bits, 32, i_crc );
796 }
797
798 block_ChainAppend( p_buf, p_hdr );
799 }
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