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 ) /* 0xBD00 -> 0xBDFF, Private Stream 1 */
87 if( ( i_id&0xf8 ) == 0x88 || /* 0x88 -> 0x8f */
88 ( i_id&0xf8 ) == 0x98 ) /* 0x98 -> 0x9f */
90 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_DTS );
93 else if( ( i_id&0xf8 ) == 0x80 || /* 0x80 -> 0x87 */
94 ( i_id&0xf0 ) == 0xc0 ) /* 0xc0 -> 0xcf AC-3, Can also be used for DD+/E-AC-3 */
96 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_A52 );
99 else if( (i_id&0xf0) == 0xb0 ) /* 0xb0 -> 0xbf */
101 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MLP );
102 /* FIXME / untested ... */
104 else if( ( i_id&0xe0 ) == 0x20 ) /* 0x20 -> 0x3f */
106 es_format_Init( &tk->fmt, SPU_ES, VLC_CODEC_SPU );
109 else if( ( i_id&0xf0 ) == 0xa0 ) /* 0xa0 -> 0xaf */
111 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_DVD_LPCM );
114 else if( ( i_id&0xff ) == 0x70 ) /* 0x70 */
116 es_format_Init( &tk->fmt, SPU_ES, VLC_CODEC_OGT );
118 else if( ( i_id&0xfc ) == 0x00 ) /* 0x00 -> 0x03 */
120 es_format_Init( &tk->fmt, SPU_ES, VLC_CODEC_CVD );
122 else if( ( i_id&0xff ) == 0x10 ) /* 0x10 */
124 es_format_Init( &tk->fmt, SPU_ES, VLC_CODEC_TELETEXT );
128 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
132 else if( (i_id&0xff00) == 0xfd00 ) /* 0xFD00 -> 0xFDFF */
134 uint8_t i_sub_id = i_id & 0xff;
135 if( i_sub_id >= 0x55 && i_sub_id <= 0x5f )
137 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_VC1 );
141 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
145 else if( (i_id&0xff00) == 0xa000 ) /* 0xA000 -> 0xA0FF */
147 uint8_t i_sub_id = i_id & 0x07;
150 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_DVDA_LPCM );
153 else if( i_sub_id == 1 )
155 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MLP );
156 tk->i_skip = -1; /* It's a hack for variable skip value */
160 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
166 int i_type = ps_id_to_type( p_psm , i_id );
168 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
170 if( (i_id&0xf0) == 0xe0 ) /* 0xe0 -> 0xef */
174 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_H264 );
176 else if( i_type == 0x10 )
178 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_MP4V );
180 else if( i_type == 0x01 ||
183 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_MPGV );
185 else if( tk->fmt.i_cat == UNKNOWN_ES )
187 es_format_Init( &tk->fmt, VIDEO_ES, VLC_CODEC_MPGV );
190 else if( ( i_id&0xe0 ) == 0xc0 ) /* 0xc0 -> 0xdf */
192 if( i_type == 0x03 ||
195 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MPGA );
197 else if( i_type == 0x0f )
199 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MP4A );
201 else if( i_type == 0x11 )
203 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MP4A );
205 else if( tk->fmt.i_cat == UNKNOWN_ES )
207 es_format_Init( &tk->fmt, AUDIO_ES, VLC_CODEC_MPGA );
210 else if( tk->fmt.i_cat == UNKNOWN_ES ) return VLC_EGENERIC;
213 /* PES packets usually contain truncated frames */
214 tk->fmt.b_packetized = false;
216 if( ps_id_to_lang( p_psm, i_id ) )
218 tk->fmt.psz_language = malloc( 4 );
219 if( tk->fmt.psz_language )
221 memcpy( tk->fmt.psz_language, ps_id_to_lang( p_psm , i_id ), 3 );
222 tk->fmt.psz_language[3] = 0;
229 /* return the id of a PES (should be valid) */
230 static inline int ps_pkt_id( block_t *p_pkt )
232 if( p_pkt->p_buffer[3] == 0xbd &&
233 p_pkt->i_buffer >= 9 &&
234 p_pkt->i_buffer >= 9 + (size_t)p_pkt->p_buffer[8] )
236 const unsigned i_start = 9 + p_pkt->p_buffer[8];
237 const uint8_t i_sub_id = p_pkt->p_buffer[i_start];
239 if( (i_sub_id & 0xfe) == 0xa0 &&
240 p_pkt->i_buffer >= i_start + 7 &&
241 ( p_pkt->p_buffer[i_start + 5] >= 0xc0 ||
242 p_pkt->p_buffer[i_start + 6] != 0x80 ) )
244 /* AOB LPCM/MLP extension
245 * XXX for MLP I think that the !=0x80 test is not good and
246 * will fail for some valid files */
247 return 0xa000 | (i_sub_id & 0x01);
251 return 0xbd00 | i_sub_id;
253 else if( p_pkt->p_buffer[3] == 0xfd &&
254 p_pkt->i_buffer >= 9 &&
255 (p_pkt->p_buffer[6]&0xC0) == 0x80 && /* mpeg2 */
256 (p_pkt->p_buffer[7]&0x01) == 0x01 ) /* extension_flag */
258 /* ISO 13818 amendment 2 and SMPTE RP 227 */
259 const uint8_t i_flags = p_pkt->p_buffer[7];
260 unsigned int i_skip = 9;
262 /* Find PES extension */
263 if( (i_flags & 0x80 ) )
265 i_skip += 5; /* pts */
266 if( (i_flags & 0x40) )
267 i_skip += 5; /* dts */
269 if( (i_flags & 0x20 ) )
271 if( (i_flags & 0x10 ) )
273 if( (i_flags & 0x08 ) )
275 if( (i_flags & 0x04 ) )
277 if( (i_flags & 0x02 ) )
280 if( i_skip < p_pkt->i_buffer && (p_pkt->p_buffer[i_skip]&0x01) )
282 const uint8_t i_flags2 = p_pkt->p_buffer[i_skip];
284 /* Find PES extension 2 */
286 if( i_flags2 & 0x80 )
288 if( (i_flags2 & 0x40) && i_skip < p_pkt->i_buffer )
289 i_skip += 1 + p_pkt->p_buffer[i_skip];
290 if( i_flags2 & 0x20 )
292 if( i_flags2 & 0x10 )
295 if( i_skip + 1 < p_pkt->i_buffer )
297 const int i_extension_field_length = p_pkt->p_buffer[i_skip]&0x7f;
298 if( i_extension_field_length >=1 )
300 int i_stream_id_extension_flag = (p_pkt->p_buffer[i_skip+1] >> 7)&0x1;
301 if( i_stream_id_extension_flag == 0 )
302 return 0xfd00 | (p_pkt->p_buffer[i_skip+1]&0x7f);
307 return p_pkt->p_buffer[3];
310 /* return the size of the next packet */
311 static inline int ps_pkt_size( const uint8_t *p, int i_peek )
313 if( unlikely(i_peek < 4) )
317 else if( p[3] == 0xb9 )
321 else if( p[3] == 0xba )
323 if( i_peek >= 14 && (p[4] >> 6) == 0x01 )
325 return 14 + (p[13]&0x07);
327 else if( i_peek >= 12 && (p[4] >> 4) == 0x02 )
333 else if( i_peek >= 6 )
335 return 6 + ((p[4]<<8) | p[5] );
340 /* parse a PACK PES */
341 static inline int ps_pkt_parse_pack( block_t *p_pkt, int64_t *pi_scr,
344 uint8_t *p = p_pkt->p_buffer;
345 if( p_pkt->i_buffer >= 14 && (p[4] >> 6) == 0x01 )
347 *pi_scr =((((int64_t)p[4]&0x38) << 27 )|
348 (((int64_t)p[4]&0x03) << 28 )|
349 ((int64_t)p[5] << 20 )|
350 (((int64_t)p[6]&0xf8) << 12 )|
351 (((int64_t)p[6]&0x03) << 13 )|
352 ((int64_t)p[7] << 5 )|
353 ((int64_t)p[8] >> 3 )) * 100 / 9;
355 *pi_mux_rate = ( p[10] << 14 )|( p[11] << 6 )|( p[12] >> 2);
357 else if( p_pkt->i_buffer >= 12 && (p[4] >> 4) == 0x02 )
359 *pi_scr =((((int64_t)p[4]&0x0e) << 29 )|
360 ((int64_t)p[5] << 22 )|
361 (((int64_t)p[6]&0xfe) << 14 )|
362 ((int64_t)p[7] << 7 )|
363 ((int64_t)p[8] >> 1 )) * 100 / 9;
365 *pi_mux_rate = ( ( p[9]&0x7f )<< 15 )|( p[10] << 7 )|( p[11] >> 1);
374 /* Parse a SYSTEM PES */
375 static inline int ps_pkt_parse_system( block_t *p_pkt, ps_psm_t *p_psm,
376 ps_track_t tk[PS_TK_COUNT] )
378 uint8_t *p = &p_pkt->p_buffer[6 + 3 + 1 + 1 + 1];
380 /* System header is not useable if it references private streams (0xBD)
381 * or 'all audio streams' (0xB8) or 'all video streams' (0xB9) */
382 while( p < &p_pkt->p_buffer[p_pkt->i_buffer] )
386 /* fprintf( stderr, " SYSTEM_START_CODEEE: id=0x%x\n", p[0] ); */
387 if( p[0] >= 0xBC || p[0] == 0xB8 || p[0] == 0xB9 ) p += 2;
392 int i_tk = PS_ID_TO_TK( i_id );
394 if( !tk[i_tk].b_seen )
396 if( !ps_track_fill( &tk[i_tk], p_psm, i_id ) )
398 tk[i_tk].b_seen = true;
406 /* Parse a PES (and skip i_skip_extra in the payload) */
407 static inline int ps_pkt_parse_pes( block_t *p_pes, int i_skip_extra )
410 unsigned int i_skip = 0;
414 memcpy( header, p_pes->p_buffer, __MIN( p_pes->i_buffer, 34 ) );
418 case 0xBC: /* Program stream map */
419 case 0xBE: /* Padding */
420 case 0xBF: /* Private stream 2 */
423 case 0xFF: /* Program stream directory */
424 case 0xF2: /* DSMCC stream */
425 case 0xF8: /* ITU-T H.222.1 type E stream */
430 if( ( header[6]&0xC0 ) == 0x80 )
433 i_skip = header[8] + 9;
435 if( header[7]&0x80 ) /* has pts */
437 i_pts = ((mtime_t)(header[ 9]&0x0e ) << 29)|
438 (mtime_t)(header[10] << 22)|
439 ((mtime_t)(header[11]&0xfe) << 14)|
440 (mtime_t)(header[12] << 7)|
441 (mtime_t)(header[13] >> 1);
443 if( header[7]&0x40 ) /* has dts */
445 i_dts = ((mtime_t)(header[14]&0x0e ) << 29)|
446 (mtime_t)(header[15] << 22)|
447 ((mtime_t)(header[16]&0xfe) << 14)|
448 (mtime_t)(header[17] << 7)|
449 (mtime_t)(header[18] >> 1);
456 while( i_skip < 23 && header[i_skip] == 0xff )
462 /* msg_Err( p_demux, "too much MPEG-1 stuffing" ); */
465 if( ( header[i_skip] & 0xC0 ) == 0x40 )
470 if( header[i_skip]&0x20 )
472 i_pts = ((mtime_t)(header[i_skip]&0x0e ) << 29)|
473 (mtime_t)(header[i_skip+1] << 22)|
474 ((mtime_t)(header[i_skip+2]&0xfe) << 14)|
475 (mtime_t)(header[i_skip+3] << 7)|
476 (mtime_t)(header[i_skip+4] >> 1);
478 if( header[i_skip]&0x10 ) /* has dts */
480 i_dts = ((mtime_t)(header[i_skip+5]&0x0e ) << 29)|
481 (mtime_t)(header[i_skip+6] << 22)|
482 ((mtime_t)(header[i_skip+7]&0xfe) << 14)|
483 (mtime_t)(header[i_skip+8] << 7)|
484 (mtime_t)(header[i_skip+9] >> 1);
499 if( i_skip_extra >= 0 )
500 i_skip += i_skip_extra;
501 else if( p_pes->i_buffer > i_skip + 3 &&
502 ( ps_pkt_id( p_pes ) == 0xa001 || ps_pkt_id( p_pes ) == 0xbda1 ) )
503 i_skip += 4 + p_pes->p_buffer[i_skip+3];
505 if( p_pes->i_buffer <= i_skip )
510 p_pes->p_buffer += i_skip;
511 p_pes->i_buffer -= i_skip;
514 p_pes->i_dts = VLC_TS_0 + 100 * i_dts / 9;
516 p_pes->i_pts = VLC_TS_0 + 100 * i_pts / 9;
521 /* Program stream map handling */
522 typedef struct ps_es_t
528 uint8_t *p_descriptor;
530 /* Language is iso639-2T */
543 static inline int ps_id_to_type( const ps_psm_t *p_psm, int i_id )
546 for( i = 0; p_psm && i < p_psm->i_es; i++ )
548 if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->i_type;
553 static inline const uint8_t *ps_id_to_lang( const ps_psm_t *p_psm, int i_id )
556 for( i = 0; p_psm && i < p_psm->i_es; i++ )
558 if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->lang;
563 static inline void ps_psm_init( ps_psm_t *p_psm )
565 p_psm->i_version = 0xFFFF;
570 static inline void ps_psm_destroy( ps_psm_t *p_psm )
572 while( p_psm->i_es-- )
574 free( p_psm->es[p_psm->i_es]->p_descriptor );
575 free( p_psm->es[p_psm->i_es] );
583 static inline int ps_psm_fill( ps_psm_t *p_psm, block_t *p_pkt,
584 ps_track_t tk[PS_TK_COUNT], es_out_t *out )
586 int i_buffer = p_pkt->i_buffer;
587 uint8_t *p_buffer = p_pkt->p_buffer;
588 int i_length, i_version, i_info_length, i_es_base;
590 if( !p_psm || p_buffer[3] != 0xbc ) return VLC_EGENERIC;
592 i_length = (uint16_t)(p_buffer[4] << 8) + p_buffer[5] + 6;
593 if( i_length > i_buffer ) return VLC_EGENERIC;
595 //i_current_next_indicator = (p_buffer[6] & 0x01);
596 i_version = (p_buffer[6] & 0xf8);
598 if( p_psm->i_version == i_version ) return VLC_EGENERIC;
600 ps_psm_destroy( p_psm );
602 i_info_length = (uint16_t)(p_buffer[8] << 8) + p_buffer[9];
603 if( i_info_length + 10 > i_length ) return VLC_EGENERIC;
605 /* Elementary stream map */
606 /* int i_esm_length = (uint16_t)(p_buffer[ 10 + i_info_length ] << 8) +
607 p_buffer[ 11 + i_info_length]; */
608 i_es_base = 12 + i_info_length;
610 while( i_es_base + 4 < i_length )
614 es.lang[0] = es.lang[1] = es.lang[2] = 0;
616 es.i_type = p_buffer[ i_es_base ];
617 es.i_id = p_buffer[ i_es_base + 1 ];
618 i_info_length = (uint16_t)(p_buffer[ i_es_base + 2 ] << 8) +
619 p_buffer[ i_es_base + 3 ];
621 if( i_es_base + 4 + i_info_length > i_length ) break;
623 /* TODO Add support for VC-1 stream:
624 * stream_type=0xea, stream_id=0xfd AND registration
625 * descriptor 0x5 with format_identifier == 0x56432D31 (VC-1)
626 * (I need a sample that use PSM with VC-1) */
629 es.i_descriptor = i_info_length;
630 if( i_info_length > 0 )
634 es.p_descriptor = malloc( i_info_length );
635 if( es.p_descriptor )
637 memcpy( es.p_descriptor, p_buffer + i_es_base + 4, i_info_length);
639 while( i <= es.i_descriptor - 2 )
641 /* Look for the ISO639 language descriptor */
642 if( es.p_descriptor[i] != 0x0a )
644 i += es.p_descriptor[i+1] + 2;
648 if( i <= es.i_descriptor - 6 )
650 es.lang[0] = es.p_descriptor[i+2];
651 es.lang[1] = es.p_descriptor[i+3];
652 es.lang[2] = es.p_descriptor[i+4];
659 tmp_es = realloc_or_free( p_psm->es, sizeof(ps_es_t *) * (p_psm->i_es+1) );
663 p_psm->es[p_psm->i_es] = malloc( sizeof(ps_es_t) );
664 if( p_psm->es[p_psm->i_es] )
666 *p_psm->es[p_psm->i_es++] = es;
667 i_es_base += 4 + i_info_length;
674 p_psm->i_version = i_version;
676 /* Check/Modify our existing tracks */
677 for( int i = 0; i < PS_TK_COUNT; i++ )
681 if( !tk[i].b_seen || !tk[i].es ) continue;
683 if( ps_track_fill( &tk_tmp, p_psm, tk[i].i_id ) != VLC_SUCCESS )
686 if( tk_tmp.fmt.i_codec == tk[i].fmt.i_codec )
688 es_format_Clean( &tk_tmp.fmt );
692 es_out_Del( out, tk[i].es );
693 es_format_Clean( &tk[i].fmt );
697 tk[i].es = es_out_Add( out, &tk[i].fmt );