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 the VideoLAN team
8 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * Eric Petit <titer@videolan.org>
10 * Gildas Bazin <gbazin@videolan.org>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
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 General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
33 #include <vlc_codecs.h>
34 #include <vlc_block.h>
41 /*****************************************************************************
43 *****************************************************************************/
44 #define DTS_TEXT N_("DTS delay (ms)")
45 #define DTS_LONGTEXT N_("Delay the DTS (decoding time " \
46 "stamps) and PTS (presentation timestamps) of the data in the " \
47 "stream, compared to the SCRs. This allows for some buffering inside " \
48 "the client decoder.")
50 #define PES_SIZE_TEXT N_("PES maximum size")
51 #define PES_SIZE_LONGTEXT N_("Set the maximum allowed PES "\
52 "size when producing the MPEG PS streams.")
54 static int Open ( vlc_object_t * );
55 static void Close ( vlc_object_t * );
57 #define SOUT_CFG_PREFIX "sout-ps-"
60 set_description( _("PS muxer") );
61 set_shortname( "MPEG-PS" );
62 set_category( CAT_SOUT );
63 set_subcategory( SUBCAT_SOUT_MUX );
64 set_capability( "sout mux", 50 );
66 add_shortcut( "mpeg1" );
67 add_shortcut( "dvd" );
68 set_callbacks( Open, Close );
70 add_integer( SOUT_CFG_PREFIX "dts-delay", 200, NULL, DTS_TEXT,
71 DTS_LONGTEXT, VLC_TRUE );
73 add_integer( SOUT_CFG_PREFIX "pes-max-size", PES_PAYLOAD_SIZE_MAX, NULL,
74 PES_SIZE_TEXT, PES_SIZE_LONGTEXT, VLC_TRUE );
78 /*****************************************************************************
80 *****************************************************************************/
81 static int Control ( sout_mux_t *, int, va_list );
82 static int AddStream( sout_mux_t *, sout_input_t * );
83 static int DelStream( sout_mux_t *, sout_input_t * );
84 static int Mux ( sout_mux_t * );
86 /*****************************************************************************
88 *****************************************************************************/
89 static int MuxGetStream ( sout_mux_t *, int *, mtime_t * );
91 static void MuxWritePackHeader ( sout_mux_t *, block_t **, mtime_t );
92 static void MuxWriteSystemHeader( sout_mux_t *, block_t **, mtime_t );
93 static void MuxWritePSM ( sout_mux_t *, block_t **, mtime_t );
95 static void StreamIdInit ( vlc_bool_t *id, int i_range );
96 static int StreamIdGet ( vlc_bool_t *id, int i_id_min, int i_id_max );
97 static void StreamIdRelease ( vlc_bool_t *id, int i_id_min, int i_id );
99 typedef struct ps_stream_s
103 int i_max_buff_size; /* used in system header */
105 /* Language is iso639-2T */
110 struct sout_mux_sys_t
112 /* Which id are unused */
113 vlc_bool_t stream_id_mpga[16]; /* 0xc0 -> 0xcf */
114 vlc_bool_t stream_id_mpgv[16]; /* 0xe0 -> 0xef */
115 vlc_bool_t stream_id_a52[8]; /* 0x80 -> 0x87 <- FIXME I'm not sure */
116 vlc_bool_t stream_id_spu[32]; /* 0x20 -> 0x3f */
117 vlc_bool_t stream_id_dts[8]; /* 0x88 -> 0x8f */
118 vlc_bool_t stream_id_lpcm[16]; /* 0xa0 -> 0xaf */
125 int i_rate_bound; /* units of 50 bytes/second */
127 int64_t i_instant_bitrate;
128 int64_t i_instant_size;
129 int64_t i_instant_dts;
136 uint32_t crc32_table[256];
139 static const char *ppsz_sout_options[] = {
140 "dts-delay", "pes-max-size", NULL
143 /*****************************************************************************
145 *****************************************************************************/
146 static int Open( vlc_object_t *p_this )
148 sout_mux_t *p_mux = (sout_mux_t*)p_this;
149 sout_mux_sys_t *p_sys;
152 msg_Info( p_mux, "Open" );
153 config_ChainParse( p_mux, SOUT_CFG_PREFIX, ppsz_sout_options, p_mux->p_cfg );
155 p_mux->pf_control = Control;
156 p_mux->pf_addstream = AddStream;
157 p_mux->pf_delstream = DelStream;
159 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
161 /* Init free stream id */
162 StreamIdInit( p_sys->stream_id_a52, 8 );
163 StreamIdInit( p_sys->stream_id_dts, 8 );
164 StreamIdInit( p_sys->stream_id_mpga, 16 );
165 StreamIdInit( p_sys->stream_id_mpgv, 16 );
166 StreamIdInit( p_sys->stream_id_lpcm, 16 );
167 StreamIdInit( p_sys->stream_id_spu, 32 );
169 p_sys->i_audio_bound = 0;
170 p_sys->i_video_bound = 0;
171 p_sys->i_system_header = 0;
172 p_sys->i_pes_count = 0;
174 p_sys->i_psm_version = 0;
176 p_sys->i_instant_bitrate = 0;
177 p_sys->i_instant_size = 0;
178 p_sys->i_instant_dts = 0;
179 p_sys->i_rate_bound = 0;
180 p_sys->b_mpeg2 = !(p_mux->psz_mux && !strcmp( p_mux->psz_mux, "mpeg1" ));
182 var_Get( p_mux, SOUT_CFG_PREFIX "dts-delay", &val );
183 p_sys->i_dts_delay = (int64_t)val.i_int * 1000;
185 var_Get( p_mux, SOUT_CFG_PREFIX "pes-max-size", &val );
186 p_sys->i_pes_max_size = (int64_t)val.i_int;
188 /* Initialise CRC32 table */
193 for( i = 0; i < 256; i++ )
196 for( j = (i << 24) | 0x800000; j != 0x80000000; j <<= 1 )
197 k = (k << 1) ^ (((k ^ j) & 0x80000000) ? 0x04c11db7 : 0);
199 p_sys->crc32_table[i] = k;
206 /*****************************************************************************
208 *****************************************************************************/
209 static void Close( vlc_object_t * p_this )
211 sout_mux_t *p_mux = (sout_mux_t*)p_this;
212 sout_mux_sys_t *p_sys = p_mux->p_sys;
216 msg_Info( p_mux, "Close" );
218 p_end = block_New( p_mux, 4 );
219 p_end->p_buffer[0] = 0x00; p_end->p_buffer[1] = 0x00;
220 p_end->p_buffer[2] = 0x01; p_end->p_buffer[3] = 0xb9;
222 sout_AccessOutWrite( p_mux->p_access, p_end );
227 /*****************************************************************************
229 *****************************************************************************/
230 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
237 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
238 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
242 case MUX_GET_ADD_STREAM_WAIT:
243 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
244 *pb_bool = VLC_FALSE;
248 ppsz = (char**)va_arg( args, char ** );
249 *ppsz = strdup( "video/mpeg" );
257 /*****************************************************************************
259 *****************************************************************************/
260 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
262 sout_mux_sys_t *p_sys = p_mux->p_sys;
263 ps_stream_t *p_stream;
266 msg_Dbg( p_mux, "adding input codec=%4.4s",
267 (char*)&p_input->p_fmt->i_codec );
269 p_input->p_sys = p_stream = malloc( sizeof( ps_stream_t ) );
270 p_stream->i_stream_type = 0x81;
272 /* Init this new stream */
273 switch( p_input->p_fmt->i_codec )
275 case VLC_FOURCC( 'm', 'p', '1', 'v' ):
276 p_stream->i_stream_id =
277 StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
278 p_stream->i_stream_type = 0x01; /* ISO/IEC 11172 Video */
280 case VLC_FOURCC( 'm', 'p', '2', 'v' ):
281 case VLC_FOURCC( 'm', 'p', 'g', 'v' ):
282 p_stream->i_stream_id =
283 StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
284 p_stream->i_stream_type = 0x02; /* ISO/IEC 13818 Video */
286 case VLC_FOURCC( 'm', 'p', '4', 'v' ):
287 p_stream->i_stream_id =
288 StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
289 p_stream->i_stream_type = 0x10;
291 case VLC_FOURCC( 'h', '2', '6', '4' ):
292 p_stream->i_stream_id =
293 StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
294 p_stream->i_stream_type = 0x1b;
296 case VLC_FOURCC( 'l', 'p', 'c', 'm' ):
297 p_stream->i_stream_id =
298 0xbd00 | StreamIdGet( p_sys->stream_id_lpcm, 0xa0, 0xaf );
300 case VLC_FOURCC( 'd', 't', 's', ' ' ):
301 p_stream->i_stream_id =
302 0xbd00 | StreamIdGet( p_sys->stream_id_dts, 0x88, 0x8f );
304 case VLC_FOURCC( 'a', '5', '2', ' ' ):
305 p_stream->i_stream_id =
306 0xbd00 | StreamIdGet( p_sys->stream_id_a52, 0x80, 0x87 );
308 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
309 p_stream->i_stream_id =
310 StreamIdGet( p_sys->stream_id_mpga, 0xc0, 0xcf );
311 p_stream->i_stream_type = 0x03; /* ISO/IEC 11172 Audio */
313 case VLC_FOURCC( 'm', 'p', '4', 'a' ):
314 p_stream->i_stream_id =
315 StreamIdGet( p_sys->stream_id_mpga, 0xc0, 0xcf );
316 p_stream->i_stream_type = 0x0f;
318 case VLC_FOURCC( 's', 'p', 'u', ' ' ):
319 p_stream->i_stream_id =
320 0xbd00 | StreamIdGet( p_sys->stream_id_spu, 0x20, 0x3f );
326 if( p_stream->i_stream_id < 0 ) goto error;
328 if( p_input->p_fmt->i_cat == AUDIO_ES )
330 p_sys->i_audio_bound++;
331 p_stream->i_max_buff_size = 4 * 1024;
333 else if( p_input->p_fmt->i_cat == VIDEO_ES )
335 p_sys->i_video_bound++;
336 p_stream->i_max_buff_size = 400 * 1024; /* FIXME -- VCD uses 46, SVCD
337 uses 230, ffmpeg has 230 with a note that it is small */
340 { /* FIXME -- what's valid for not audio or video? */
341 p_stream->i_max_buff_size = 4 * 1024;
344 /* Try to set a sensible default value for the instant bitrate */
345 p_sys->i_instant_bitrate += p_input->p_fmt->i_bitrate + 1000/* overhead */;
347 /* FIXME -- spec requires an upper limit rate boundary in the system header;
348 our codecs are VBR; using 2x nominal rate, convert to 50 bytes/sec */
349 p_sys->i_rate_bound += p_input->p_fmt->i_bitrate * 2 / (8 * 50);
350 p_sys->i_psm_version++;
352 p_stream->lang[0] = p_stream->lang[1] = p_stream->lang[2] = 0;
353 if( p_input->p_fmt->psz_language )
355 char *psz = p_input->p_fmt->psz_language;
356 const iso639_lang_t *pl = NULL;
358 if( strlen( psz ) == 2 )
360 pl = GetLang_1( psz );
362 else if( strlen( psz ) == 3 )
364 pl = GetLang_2B( psz );
365 if( !strcmp( pl->psz_iso639_1, "??" ) )
367 pl = GetLang_2T( psz );
370 if( pl && strcmp( pl->psz_iso639_1, "??" ) )
372 p_stream->lang[0] = pl->psz_iso639_2T[0];
373 p_stream->lang[1] = pl->psz_iso639_2T[1];
374 p_stream->lang[2] = pl->psz_iso639_2T[2];
376 msg_Dbg( p_mux, " - lang=%c%c%c",
377 p_stream->lang[0], p_stream->lang[1], p_stream->lang[2] );
387 /*****************************************************************************
389 *****************************************************************************/
390 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
392 sout_mux_sys_t *p_sys = p_mux->p_sys;
393 ps_stream_t *p_stream =(ps_stream_t*)p_input->p_sys;
395 msg_Dbg( p_mux, "removing input" );
396 switch( p_input->p_fmt->i_codec )
398 case VLC_FOURCC( 'm', 'p', 'g', 'v' ):
399 StreamIdRelease( p_sys->stream_id_mpgv, 0xe0,
400 p_stream->i_stream_id );
402 case VLC_FOURCC( 'l', 'p', 'c', 'm' ):
403 StreamIdRelease( p_sys->stream_id_lpcm, 0xa0,
404 p_stream->i_stream_id&0xff );
406 case VLC_FOURCC( 'd', 't', 's', ' ' ):
407 StreamIdRelease( p_sys->stream_id_dts, 0x88,
408 p_stream->i_stream_id&0xff );
410 case VLC_FOURCC( 'a', '5', '2', ' ' ):
411 StreamIdRelease( p_sys->stream_id_a52, 0x80,
412 p_stream->i_stream_id&0xff );
414 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
415 StreamIdRelease( p_sys->stream_id_mpga, 0xc0,
416 p_stream->i_stream_id );
418 case VLC_FOURCC( 's', 'p', 'u', ' ' ):
419 StreamIdRelease( p_sys->stream_id_spu, 0x20,
420 p_stream->i_stream_id&0xff );
427 if( p_input->p_fmt->i_cat == AUDIO_ES )
429 p_sys->i_audio_bound--;
431 else if( p_input->p_fmt->i_cat == VIDEO_ES )
433 p_sys->i_video_bound--;
436 /* Try to set a sensible default value for the instant bitrate */
437 p_sys->i_instant_bitrate -= (p_input->p_fmt->i_bitrate + 1000);
438 /* rate_bound is in units of 50 bytes/second */
439 p_sys->i_rate_bound -= (p_input->p_fmt->i_bitrate * 2)/(8 * 50);
441 p_sys->i_psm_version++;
447 /*****************************************************************************
448 * Mux: Call each time there is new data for at least one stream
449 *****************************************************************************/
450 static int Mux( sout_mux_t *p_mux )
452 sout_mux_sys_t *p_sys = p_mux->p_sys;
456 sout_input_t *p_input;
457 ps_stream_t *p_stream;
459 block_t *p_ps, *p_data;
464 /* Choose which stream to mux */
465 if( MuxGetStream( p_mux, &i_stream, &i_dts ) )
470 p_input = p_mux->pp_inputs[i_stream];
471 p_stream = (ps_stream_t*)p_input->p_sys;
474 /* Write regulary PackHeader */
475 if( p_sys->i_pes_count % 30 == 0)
477 /* Update the instant bitrate every second or so */
478 if( p_sys->i_instant_size &&
479 i_dts - p_sys->i_instant_dts > 1000000 )
481 int64_t i_instant_bitrate = p_sys->i_instant_size * 8000000 /
482 ( i_dts - p_sys->i_instant_dts );
484 p_sys->i_instant_bitrate += i_instant_bitrate;
485 p_sys->i_instant_bitrate /= 2;
487 p_sys->i_instant_size = 0;
488 p_sys->i_instant_dts = i_dts;
490 else if( !p_sys->i_instant_size )
492 p_sys->i_instant_dts = i_dts;
495 MuxWritePackHeader( p_mux, &p_ps, i_dts );
498 /* Write regulary SystemHeader */
499 if( p_sys->i_pes_count % 300 == 0 )
503 MuxWriteSystemHeader( p_mux, &p_ps, i_dts );
505 /* For MPEG1 streaming, set HEADER flag */
506 for( p_pk = p_ps; p_pk != NULL; p_pk = p_pk->p_next )
508 p_pk->i_flags |= BLOCK_FLAG_HEADER;
512 /* Write regulary ProgramStreamMap */
513 if( p_sys->b_mpeg2 && p_sys->i_pes_count % 300 == 0 )
515 MuxWritePSM( p_mux, &p_ps, i_dts );
518 /* Get and mux a packet */
519 p_data = block_FifoGet( p_input->p_fifo );
520 E_( EStoPES )( p_mux->p_sout, &p_data, p_data,
521 p_input->p_fmt, p_stream->i_stream_id,
522 p_sys->b_mpeg2, 0, 0, p_sys->i_pes_max_size );
524 block_ChainAppend( &p_ps, p_data );
526 /* Get size of output data so we can calculate the instant bitrate */
527 for( p_data = p_ps; p_data; p_data = p_data->p_next )
529 p_sys->i_instant_size += p_data->i_buffer;
532 sout_AccessOutWrite( p_mux->p_access, p_ps );
534 /* Increase counter */
535 p_sys->i_pes_count++;
541 /*****************************************************************************
543 *****************************************************************************/
544 static void StreamIdInit( vlc_bool_t *id, int i_range )
548 for( i = 0; i < i_range; i++ )
553 static int StreamIdGet( vlc_bool_t *id, int i_id_min, int i_id_max )
557 for( i = 0; i <= i_id_max - i_id_min; i++ )
568 static void StreamIdRelease( vlc_bool_t *id, int i_id_min, int i_id )
570 id[i_id - i_id_min] = VLC_TRUE;
573 static void MuxWritePackHeader( sout_mux_t *p_mux, block_t **p_buf,
576 sout_mux_sys_t *p_sys = p_mux->p_sys;
582 i_scr = (i_dts - p_sys->i_dts_delay) * 9 / 100;
584 p_hdr = block_New( p_mux, 18 );
585 p_hdr->i_pts = p_hdr->i_dts = i_dts;
586 bits_initwrite( &bits, 14, p_hdr->p_buffer );
587 bits_write( &bits, 32, 0x01ba );
589 /* The spec specifies that the mux rate must be rounded upwards */
590 i_mux_rate = (p_sys->i_instant_bitrate + 8 * 50 - 1 ) / (8 * 50);
594 bits_write( &bits, 2, 0x01 );
598 bits_write( &bits, 4, 0x02 );
601 bits_write( &bits, 3, ( i_scr >> 30 )&0x07 );
602 bits_write( &bits, 1, 1 ); // marker
603 bits_write( &bits, 15, ( i_scr >> 15 )&0x7fff );
604 bits_write( &bits, 1, 1 ); // marker
605 bits_write( &bits, 15, i_scr&0x7fff );
606 bits_write( &bits, 1, 1 ); // marker
610 bits_write( &bits, 9, 0 ); // src extension
612 bits_write( &bits, 1, 1 ); // marker
614 bits_write( &bits, 22, i_mux_rate);
615 bits_write( &bits, 1, 1 ); // marker
619 bits_write( &bits, 1, 1 ); // marker
620 bits_write( &bits, 5, 0x1f ); // reserved
621 bits_write( &bits, 3, 0 ); // stuffing bytes
624 p_hdr->i_buffer = p_sys->b_mpeg2 ? 14: 12;
626 block_ChainAppend( p_buf, p_hdr );
629 static void MuxWriteSystemHeader( sout_mux_t *p_mux, block_t **p_buf,
632 sout_mux_sys_t *p_sys = p_mux->p_sys;
635 vlc_bool_t b_private;
638 int i_nb_private, i_nb_stream;
641 /* Count the number of private stream */
642 for( i = 0, i_nb_private = 0; i < p_mux->i_nb_inputs; i++ )
644 ps_stream_t *p_stream;
646 p_stream = (ps_stream_t*)p_mux->pp_inputs[i]->p_sys;
648 if( ( p_stream->i_stream_id&0xff00 ) == 0xbd00 )
654 /* Private stream are declared only one time */
655 i_nb_stream = p_mux->i_nb_inputs -
656 ( i_nb_private > 0 ? i_nb_private - 1 : 0 );
658 p_hdr = block_New( p_mux, 12 + i_nb_stream * 3 );
659 p_hdr->i_dts = p_hdr->i_pts = i_dts;
661 /* The spec specifies that the reported rate_bound must be upper limit */
662 i_rate_bound = (p_sys->i_rate_bound);
664 bits_initwrite( &bits, 12 + i_nb_stream * 3, p_hdr->p_buffer );
665 bits_write( &bits, 32, 0x01bb );
666 bits_write( &bits, 16, 12 - 6 + i_nb_stream * 3 );
667 bits_write( &bits, 1, 1 ); // marker bit
668 bits_write( &bits, 22, i_rate_bound);
669 bits_write( &bits, 1, 1 ); // marker bit
671 bits_write( &bits, 6, p_sys->i_audio_bound );
672 bits_write( &bits, 1, 0 ); // fixed flag
673 bits_write( &bits, 1, 0 ); // CSPS flag
674 bits_write( &bits, 1, 0 ); // system audio lock flag
675 bits_write( &bits, 1, 0 ); // system video lock flag
677 bits_write( &bits, 1, 1 ); // marker bit
679 bits_write( &bits, 5, p_sys->i_video_bound );
680 bits_write( &bits, 1, 1 ); // packet rate restriction flag (1 for mpeg1)
681 bits_write( &bits, 7, 0xff ); // reserved bits
683 /* stream_id table */
684 for( i = 0, b_private = VLC_FALSE; i < p_mux->i_nb_inputs; i++ )
686 sout_input_t *p_input;
687 ps_stream_t *p_stream;
689 p_input = p_mux->pp_inputs[i];
690 p_stream = (ps_stream_t *)p_input->p_sys;
692 if( ( p_stream->i_stream_id&0xff00 ) == 0xbd00 )
698 b_private = VLC_TRUE;
699 /* Write stream id */
700 bits_write( &bits, 8, 0xbd );
704 /* Write stream id */
705 bits_write( &bits, 8, p_stream->i_stream_id&0xff );
708 bits_write( &bits, 2, 0x03 ); /* reserved */
709 if( p_input->p_fmt->i_cat == AUDIO_ES )
711 bits_write( &bits, 1, 0 );
712 bits_write( &bits, 13, p_stream->i_max_buff_size / 128 );
714 else if( p_input->p_fmt->i_cat == VIDEO_ES )
716 bits_write( &bits, 1, 1 );
717 bits_write( &bits, 13, p_stream->i_max_buff_size / 1024);
721 /* FIXME -- the scale of 0 means do a /128 */
722 bits_write( &bits, 1, 0 );
723 bits_write( &bits, 13, p_stream->i_max_buff_size / 128 );
727 block_ChainAppend( p_buf, p_hdr );
730 static void MuxWritePSM( sout_mux_t *p_mux, block_t **p_buf, mtime_t i_dts )
732 sout_mux_sys_t *p_sys = p_mux->p_sys;
735 int i, i_psm_size = 16, i_es_map_size = 0;
737 for( i = 0; i < p_mux->i_nb_inputs; i++ )
739 sout_input_t *p_input = p_mux->pp_inputs[i];
740 ps_stream_t *p_stream = p_input->p_sys;
743 if( p_stream->lang[0] != 0 ) i_es_map_size += 6;
746 i_psm_size += i_es_map_size;
748 p_hdr = block_New( p_mux, i_psm_size );
749 p_hdr->i_dts = p_hdr->i_pts = i_dts;
751 memset( p_hdr->p_buffer, 0, p_hdr->i_buffer );
752 bits_initwrite( &bits, i_psm_size, p_hdr->p_buffer );
753 bits_write( &bits, 32, 0x01bc );
754 bits_write( &bits, 16, i_psm_size - 6 );
755 bits_write( &bits, 1, 1 ); /* current_next_indicator */
756 bits_write( &bits, 2, 0xF ); /* reserved */
757 bits_write( &bits, 5, p_sys->i_psm_version );
758 bits_write( &bits, 7, 0xFF ); /* reserved */
759 bits_write( &bits, 1, 1 ); /* marker */
761 bits_write( &bits, 16, 0 ); /* program_stream_info_length */
764 bits_write( &bits, 16, i_es_map_size ); /* elementary_stream_map_length */
765 for( i = 0; i < p_mux->i_nb_inputs; i++ )
767 sout_input_t *p_input = p_mux->pp_inputs[i];
768 ps_stream_t *p_stream = p_input->p_sys;
770 bits_write( &bits, 8, p_stream->i_stream_type ); /* stream_type */
771 bits_write( &bits, 8, p_stream->i_stream_id ); /* elementary_stream_id */
773 /* ISO639 language descriptor */
774 if( p_stream->lang[0] != 0 )
776 bits_write( &bits, 16, 6 ); /* elementary_stream_info_length */
778 bits_write( &bits, 8, 0x0a ); /* descriptor_tag */
779 bits_write( &bits, 8, 4 ); /* descriptor_length */
781 bits_write( &bits, 8, p_stream->lang[0] );
782 bits_write( &bits, 8, p_stream->lang[1] );
783 bits_write( &bits, 8, p_stream->lang[2] );
784 bits_write( &bits, 8, 0 ); /* audio type: 0x00 undefined */
788 bits_write( &bits, 16, 0 ); /* elementary_stream_info_length */
794 uint32_t i_crc = 0xffffffff;
795 for( i = 0; i < p_hdr->i_buffer; i++ )
796 i_crc = (i_crc << 8) ^
797 p_sys->crc32_table[((i_crc >> 24) ^ p_hdr->p_buffer[i]) & 0xff];
799 bits_write( &bits, 32, i_crc );
802 block_ChainAppend( p_buf, p_hdr );
806 * Find stream to be muxed.
808 static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
814 for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
816 sout_input_t *p_input = p_mux->pp_inputs[i];
819 if( block_FifoCount( p_input->p_fifo ) <= 0 )
821 if( p_input->p_fmt->i_cat == AUDIO_ES ||
822 p_input->p_fmt->i_cat == VIDEO_ES )
824 /* We need that audio+video fifo contain at least 1 packet */
832 p_data = block_FifoShow( p_input->p_fifo );
833 if( i_stream == -1 || p_data->i_dts < i_dts )
836 i_dts = p_data->i_dts;
840 *pi_stream = i_stream;