1 /*****************************************************************************
2 * ps.h: Program Stream demuxer helper
3 *****************************************************************************
4 * Copyright (C) 2004-2009 VLC authors and VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
25 #include <vlc_demux.h>
26 #include <vlc_memory.h>
28 /* 256-0xC0 for normal stream, 256 for 0xbd stream, 256 for 0xfd stream, 8 for 0xa0 AOB stream */
29 #define PS_TK_COUNT (256+256+256+8 - 0xc0)
31 #define PS_ID_TO_TK( id ) ((id) <= 0xff ? (id) - 0xc0 : \
32 ((id)&0xff) + (((id)&0xff00) == 0xbd00 ? 256-0xC0 : 512-0xc0) )
34 static inline int ps_id_to_tk( unsigned i_id )
38 else if( (i_id & 0xff00) == 0xbd00 )
39 return 256-0xC0 + (i_id & 0xff);
40 else if( (i_id & 0xff00) == 0xfd00 )
41 return 512-0xc0 + (i_id & 0xff);
43 return 768-0xc0 + (i_id & 0x07);
45 #define PS_ID_TO_TK( id ) ps_id_to_tk( id )
48 typedef struct ps_psm_t ps_psm_t;
49 static inline int ps_id_to_type( const ps_psm_t *, int );
50 static inline const uint8_t *ps_id_to_lang( const ps_psm_t *, int );
64 /* Init a set of track */
65 static inline void ps_track_init( ps_track_t tk[PS_TK_COUNT] )
68 for( i = 0; i < PS_TK_COUNT; i++ )
74 tk[i].i_first_pts = -1;
75 tk[i].i_last_pts = -1;
76 es_format_Init( &tk[i].fmt, UNKNOWN_ES, 0 );
80 /* From id fill i_skip and es_format_t */
81 static inline int ps_track_fill( ps_track_t *tk, ps_psm_t *p_psm, int i_id )
85 if( ( i_id&0xff00 ) == 0xbd00 )
87 if( ( i_id&0xf8 ) == 0x88 || (i_id&0xf8) == 0x98 )
89 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_DTS );
92 else if( ( i_id&0xf0 ) == 0x80
93 || (i_id&0xf0) == 0xc0 ) /* AC-3, Can also be used for DD+/E-AC-3 */
95 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_A52 );
98 else if( (i_id&0xf0) == 0xb0 )
100 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MLP );
101 /* FIXME / untested ... no known decoder (at least not in VLC/ffmpeg) */
103 else if( ( i_id&0xe0 ) == 0x20 )
105 es_format_Init( &tk->fmt, SPU_ES, VLC_CODEC_SPU );
108 else if( ( i_id&0xf0 ) == 0xa0 )
110 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_DVD_LPCM );
113 else if( ( i_id&0xff ) == 0x70 )
115 es_format_Init( &tk->fmt, SPU_ES, VLC_CODEC_OGT );
117 else if( ( i_id&0xfc ) == 0x00 )
119 es_format_Init( &tk->fmt, SPU_ES, VLC_CODEC_CVD );
121 else if( ( i_id&0xff ) == 0x10 )
123 es_format_Init( &tk->fmt, SPU_ES, VLC_CODEC_TELETEXT );
127 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
131 else if( (i_id&0xff00) == 0xfd00 )
133 uint8_t i_sub_id = i_id & 0xff;
134 if( i_sub_id >= 0x55 && i_sub_id <= 0x5f )
136 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_VC1 );
140 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
144 else if( (i_id&0xff00) == 0xa000 )
146 uint8_t i_sub_id = i_id & 0x07;
149 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_DVDA_LPCM );
152 else if( i_sub_id == 1 )
154 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MLP );
155 tk->i_skip = -1; /* It's a hack for variable skip value */
159 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
165 int i_type = ps_id_to_type( p_psm , i_id );
167 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
169 if( (i_id&0xf0) == 0xe0 && i_type == 0x1b )
171 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_H264 );
173 else if( (i_id&0xf0) == 0xe0 && i_type == 0x10 )
175 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_MP4V );
177 else if( (i_id&0xf0) == 0xe0 && i_type == 0x02 )
179 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_MPGV );
181 else if( ( i_id&0xe0 ) == 0xc0 && i_type == 0x0f )
183 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MP4A );
185 else if( ( i_id&0xe0 ) == 0xc0 && i_type == 0x11 )
187 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MP4A );
189 else if( ( i_id&0xe0 ) == 0xc0 && i_type == 0x03 )
191 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MPGA );
194 if( tk->fmt.i_cat == UNKNOWN_ES && ( i_id&0xf0 ) == 0xe0 )
196 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_MPGV );
198 else if( tk->fmt.i_cat == UNKNOWN_ES && ( i_id&0xe0 ) == 0xc0 )
200 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MPGA );
202 else if( tk->fmt.i_cat == UNKNOWN_ES ) return VLC_EGENERIC;
205 /* PES packets usually contain truncated frames */
206 tk->fmt.b_packetized = false;
208 if( ps_id_to_lang( p_psm, i_id ) )
210 tk->fmt.psz_language = malloc( 4 );
211 if( tk->fmt.psz_language )
213 memcpy( tk->fmt.psz_language, ps_id_to_lang( p_psm , i_id ), 3 );
214 tk->fmt.psz_language[3] = 0;
221 /* return the id of a PES (should be valid) */
222 static inline int ps_pkt_id( block_t *p_pkt )
224 if( p_pkt->p_buffer[3] == 0xbd &&
225 p_pkt->i_buffer >= 9 &&
226 p_pkt->i_buffer >= 9 + (size_t)p_pkt->p_buffer[8] )
228 const unsigned i_start = 9 + p_pkt->p_buffer[8];
229 const uint8_t i_sub_id = p_pkt->p_buffer[i_start];
231 if( (i_sub_id & 0xfe) == 0xa0 &&
232 p_pkt->i_buffer >= i_start + 7 &&
233 ( p_pkt->p_buffer[i_start + 5] >= 0xc0 ||
234 p_pkt->p_buffer[i_start + 6] != 0x80 ) )
236 /* AOB LPCM/MLP extension
237 * XXX for MLP I think that the !=0x80 test is not good and
238 * will fail for some valid files */
239 return 0xa000 | (i_sub_id & 0x01);
243 return 0xbd00 | i_sub_id;
245 else if( p_pkt->p_buffer[3] == 0xfd &&
246 p_pkt->i_buffer >= 9 &&
247 (p_pkt->p_buffer[6]&0xC0) == 0x80 && /* mpeg2 */
248 (p_pkt->p_buffer[7]&0x01) == 0x01 ) /* extension_flag */
250 /* ISO 13818 amendment 2 and SMPTE RP 227 */
251 const uint8_t i_flags = p_pkt->p_buffer[7];
252 unsigned int i_skip = 9;
254 /* Find PES extension */
255 if( (i_flags & 0x80 ) )
257 i_skip += 5; /* pts */
258 if( (i_flags & 0x40) )
259 i_skip += 5; /* dts */
261 if( (i_flags & 0x20 ) )
263 if( (i_flags & 0x10 ) )
265 if( (i_flags & 0x08 ) )
267 if( (i_flags & 0x04 ) )
269 if( (i_flags & 0x02 ) )
272 if( i_skip < p_pkt->i_buffer && (p_pkt->p_buffer[i_skip]&0x01) )
274 const uint8_t i_flags2 = p_pkt->p_buffer[i_skip];
276 /* Find PES extension 2 */
278 if( i_flags2 & 0x80 )
280 if( (i_flags2 & 0x40) && i_skip < p_pkt->i_buffer )
281 i_skip += 1 + p_pkt->p_buffer[i_skip];
282 if( i_flags2 & 0x20 )
284 if( i_flags2 & 0x10 )
287 if( i_skip + 1 < p_pkt->i_buffer )
289 const int i_extension_field_length = p_pkt->p_buffer[i_skip]&0x7f;
290 if( i_extension_field_length >=1 )
292 int i_stream_id_extension_flag = (p_pkt->p_buffer[i_skip+1] >> 7)&0x1;
293 if( i_stream_id_extension_flag == 0 )
294 return 0xfd00 | (p_pkt->p_buffer[i_skip+1]&0x7f);
299 return p_pkt->p_buffer[3];
302 /* return the size of the next packet */
303 static inline int ps_pkt_size( const uint8_t *p, int i_peek )
305 if( unlikely(i_peek < 4) )
309 else if( p[3] == 0xb9 )
313 else if( p[3] == 0xba )
315 if( i_peek >= 14 && (p[4] >> 6) == 0x01 )
317 return 14 + (p[13]&0x07);
319 else if( i_peek >= 12 && (p[4] >> 4) == 0x02 )
325 else if( i_peek >= 6 )
327 return 6 + ((p[4]<<8) | p[5] );
332 /* parse a PACK PES */
333 static inline int ps_pkt_parse_pack( block_t *p_pkt, int64_t *pi_scr,
336 uint8_t *p = p_pkt->p_buffer;
337 if( p_pkt->i_buffer >= 14 && (p[4] >> 6) == 0x01 )
339 *pi_scr =((((int64_t)p[4]&0x38) << 27 )|
340 (((int64_t)p[4]&0x03) << 28 )|
341 ((int64_t)p[5] << 20 )|
342 (((int64_t)p[6]&0xf8) << 12 )|
343 (((int64_t)p[6]&0x03) << 13 )|
344 ((int64_t)p[7] << 5 )|
345 ((int64_t)p[8] >> 3 )) * 100 / 9;
347 *pi_mux_rate = ( p[10] << 14 )|( p[11] << 6 )|( p[12] >> 2);
349 else if( p_pkt->i_buffer >= 12 && (p[4] >> 4) == 0x02 )
351 *pi_scr =((((int64_t)p[4]&0x0e) << 29 )|
352 ((int64_t)p[5] << 22 )|
353 (((int64_t)p[6]&0xfe) << 14 )|
354 ((int64_t)p[7] << 7 )|
355 ((int64_t)p[8] >> 1 )) * 100 / 9;
357 *pi_mux_rate = ( ( p[9]&0x7f )<< 15 )|( p[10] << 7 )|( p[11] >> 1);
366 /* Parse a SYSTEM PES */
367 static inline int ps_pkt_parse_system( block_t *p_pkt, ps_psm_t *p_psm,
368 ps_track_t tk[PS_TK_COUNT] )
370 uint8_t *p = &p_pkt->p_buffer[6 + 3 + 1 + 1 + 1];
372 /* System header is not useable if it references private streams (0xBD)
373 * or 'all audio streams' (0xB8) or 'all video streams' (0xB9) */
374 while( p < &p_pkt->p_buffer[p_pkt->i_buffer] )
378 /* fprintf( stderr, " SYSTEM_START_CODEEE: id=0x%x\n", p[0] ); */
379 if( p[0] >= 0xBC || p[0] == 0xB8 || p[0] == 0xB9 ) p += 2;
384 int i_tk = PS_ID_TO_TK( i_id );
386 if( !tk[i_tk].b_seen )
388 if( !ps_track_fill( &tk[i_tk], p_psm, i_id ) )
390 tk[i_tk].b_seen = true;
398 /* Parse a PES (and skip i_skip_extra in the payload) */
399 static inline int ps_pkt_parse_pes( block_t *p_pes, int i_skip_extra )
402 unsigned int i_skip = 0;
406 memcpy( header, p_pes->p_buffer, __MIN( p_pes->i_buffer, 34 ) );
410 case 0xBC: /* Program stream map */
411 case 0xBE: /* Padding */
412 case 0xBF: /* Private stream 2 */
415 case 0xFF: /* Program stream directory */
416 case 0xF2: /* DSMCC stream */
417 case 0xF8: /* ITU-T H.222.1 type E stream */
422 if( ( header[6]&0xC0 ) == 0x80 )
425 i_skip = header[8] + 9;
427 if( header[7]&0x80 ) /* has pts */
429 i_pts = ((mtime_t)(header[ 9]&0x0e ) << 29)|
430 (mtime_t)(header[10] << 22)|
431 ((mtime_t)(header[11]&0xfe) << 14)|
432 (mtime_t)(header[12] << 7)|
433 (mtime_t)(header[13] >> 1);
435 if( header[7]&0x40 ) /* has dts */
437 i_dts = ((mtime_t)(header[14]&0x0e ) << 29)|
438 (mtime_t)(header[15] << 22)|
439 ((mtime_t)(header[16]&0xfe) << 14)|
440 (mtime_t)(header[17] << 7)|
441 (mtime_t)(header[18] >> 1);
448 while( i_skip < 23 && header[i_skip] == 0xff )
454 /* msg_Err( p_demux, "too much MPEG-1 stuffing" ); */
457 if( ( header[i_skip] & 0xC0 ) == 0x40 )
462 if( header[i_skip]&0x20 )
464 i_pts = ((mtime_t)(header[i_skip]&0x0e ) << 29)|
465 (mtime_t)(header[i_skip+1] << 22)|
466 ((mtime_t)(header[i_skip+2]&0xfe) << 14)|
467 (mtime_t)(header[i_skip+3] << 7)|
468 (mtime_t)(header[i_skip+4] >> 1);
470 if( header[i_skip]&0x10 ) /* has dts */
472 i_dts = ((mtime_t)(header[i_skip+5]&0x0e ) << 29)|
473 (mtime_t)(header[i_skip+6] << 22)|
474 ((mtime_t)(header[i_skip+7]&0xfe) << 14)|
475 (mtime_t)(header[i_skip+8] << 7)|
476 (mtime_t)(header[i_skip+9] >> 1);
491 if( i_skip_extra >= 0 )
492 i_skip += i_skip_extra;
493 else if( p_pes->i_buffer > i_skip + 3 &&
494 ( ps_pkt_id( p_pes ) == 0xa001 || ps_pkt_id( p_pes ) == 0xbda1 ) )
495 i_skip += 4 + p_pes->p_buffer[i_skip+3];
497 if( p_pes->i_buffer <= i_skip )
502 p_pes->p_buffer += i_skip;
503 p_pes->i_buffer -= i_skip;
506 p_pes->i_dts = VLC_TS_0 + 100 * i_dts / 9;
508 p_pes->i_pts = VLC_TS_0 + 100 * i_pts / 9;
513 /* Program stream map handling */
514 typedef struct ps_es_t
520 uint8_t *p_descriptor;
522 /* Language is iso639-2T */
535 static inline int ps_id_to_type( const ps_psm_t *p_psm, int i_id )
538 for( i = 0; p_psm && i < p_psm->i_es; i++ )
540 if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->i_type;
545 static inline const uint8_t *ps_id_to_lang( const ps_psm_t *p_psm, int i_id )
548 for( i = 0; p_psm && i < p_psm->i_es; i++ )
550 if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->lang;
555 static inline void ps_psm_init( ps_psm_t *p_psm )
557 p_psm->i_version = 0xFFFF;
562 static inline void ps_psm_destroy( ps_psm_t *p_psm )
564 while( p_psm->i_es-- )
566 free( p_psm->es[p_psm->i_es]->p_descriptor );
567 free( p_psm->es[p_psm->i_es] );
575 static inline int ps_psm_fill( ps_psm_t *p_psm, block_t *p_pkt,
576 ps_track_t tk[PS_TK_COUNT], es_out_t *out )
578 int i_buffer = p_pkt->i_buffer;
579 uint8_t *p_buffer = p_pkt->p_buffer;
580 int i_length, i_version, i_info_length, i_es_base;
582 if( !p_psm || p_buffer[3] != 0xbc ) return VLC_EGENERIC;
584 i_length = (uint16_t)(p_buffer[4] << 8) + p_buffer[5] + 6;
585 if( i_length > i_buffer ) return VLC_EGENERIC;
587 //i_current_next_indicator = (p_buffer[6] & 0x01);
588 i_version = (p_buffer[6] & 0xf8);
590 if( p_psm->i_version == i_version ) return VLC_EGENERIC;
592 ps_psm_destroy( p_psm );
594 i_info_length = (uint16_t)(p_buffer[8] << 8) + p_buffer[9];
595 if( i_info_length + 10 > i_length ) return VLC_EGENERIC;
597 /* Elementary stream map */
598 /* int i_esm_length = (uint16_t)(p_buffer[ 10 + i_info_length ] << 8) +
599 p_buffer[ 11 + i_info_length]; */
600 i_es_base = 12 + i_info_length;
602 while( i_es_base + 4 < i_length )
606 es.lang[0] = es.lang[1] = es.lang[2] = 0;
608 es.i_type = p_buffer[ i_es_base ];
609 es.i_id = p_buffer[ i_es_base + 1 ];
610 i_info_length = (uint16_t)(p_buffer[ i_es_base + 2 ] << 8) +
611 p_buffer[ i_es_base + 3 ];
613 if( i_es_base + 4 + i_info_length > i_length ) break;
615 /* TODO Add support for VC-1 stream:
616 * stream_type=0xea, stream_id=0xfd AND registration
617 * descriptor 0x5 with format_identifier == 0x56432D31 (VC-1)
618 * (I need a sample that use PSM with VC-1) */
621 es.i_descriptor = i_info_length;
622 if( i_info_length > 0 )
626 es.p_descriptor = malloc( i_info_length );
627 if( es.p_descriptor )
629 memcpy( es.p_descriptor, p_buffer + i_es_base + 4, i_info_length);
631 while( i <= es.i_descriptor - 2 )
633 /* Look for the ISO639 language descriptor */
634 if( es.p_descriptor[i] != 0x0a )
636 i += es.p_descriptor[i+1] + 2;
640 if( i <= es.i_descriptor - 6 )
642 es.lang[0] = es.p_descriptor[i+2];
643 es.lang[1] = es.p_descriptor[i+3];
644 es.lang[2] = es.p_descriptor[i+4];
651 tmp_es = realloc_or_free( p_psm->es, sizeof(ps_es_t *) * (p_psm->i_es+1) );
655 p_psm->es[p_psm->i_es] = malloc( sizeof(ps_es_t) );
656 if( p_psm->es[p_psm->i_es] )
658 *p_psm->es[p_psm->i_es++] = es;
659 i_es_base += 4 + i_info_length;
666 p_psm->i_version = i_version;
668 /* Check/Modify our existing tracks */
669 for( int i = 0; i < PS_TK_COUNT; i++ )
673 if( !tk[i].b_seen || !tk[i].es ) continue;
675 if( ps_track_fill( &tk_tmp, p_psm, tk[i].i_id ) != VLC_SUCCESS )
678 if( tk_tmp.fmt.i_codec == tk[i].fmt.i_codec )
680 es_format_Clean( &tk_tmp.fmt );
684 es_out_Del( out, tk[i].es );
685 es_format_Clean( &tk[i].fmt );
689 tk[i].es = es_out_Add( out, &tk[i].fmt );