1 /*****************************************************************************
2 * ps.h: Program Stream demuxer helper
3 *****************************************************************************
4 * Copyright (C) 2004 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 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 General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 #include <vlc_demux.h>
26 /* 256-0xC0 for normal stream, 256 for 0xbd stream, 256 for 0xfd stream */
27 #define PS_TK_COUNT (768 - 0xc0)
28 #define PS_ID_TO_TK( id ) ((id) <= 0xff ? (id) - 0xc0 : \
29 ((id)&0xff) + (((id)&0xff00) == 0xbd00 ? 256-0xC0 : 512-0xc0) )
31 typedef struct ps_psm_t ps_psm_t;
32 static inline int ps_id_to_type( const ps_psm_t *, int );
33 static inline const uint8_t *ps_id_to_lang( const ps_psm_t *, int );
47 /* Init a set of track */
48 static inline void ps_track_init( ps_track_t tk[PS_TK_COUNT] )
51 for( i = 0; i < PS_TK_COUNT; i++ )
57 tk[i].i_first_pts = -1;
58 tk[i].i_last_pts = -1;
59 es_format_Init( &tk[i].fmt, UNKNOWN_ES, 0 );
63 /* From id fill i_skip and es_format_t */
64 static inline int ps_track_fill( ps_track_t *tk, ps_psm_t *p_psm, int i_id )
68 if( ( i_id&0xff00 ) == 0xbd00 )
70 if( ( i_id&0xf8 ) == 0x88 || (i_id&0xf8) == 0x98 )
72 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('d','t','s',' ') );
75 else if( ( i_id&0xf0 ) == 0x80
76 || (i_id&0xf0) == 0xc0 ) /* AC-3, Can also be used for DD+/E-AC-3 */
78 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('a','5','2',' ') );
81 else if( (i_id&0xf0) == 0xb0 )
83 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('m','l','p',' ') );
84 /* FIXME / untested ... no known decoder (at least not in VLC/ffmpeg) */
86 else if( ( i_id&0xe0 ) == 0x20 )
88 es_format_Init( &tk->fmt, SPU_ES, VLC_FOURCC('s','p','u',' ') );
91 else if( ( i_id&0xf0 ) == 0xa0 )
93 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('l','p','c','m') );
96 else if( ( i_id&0xff ) == 0x70 )
98 es_format_Init( &tk->fmt, SPU_ES, VLC_FOURCC('o','g','t',' ') );
100 else if( ( i_id&0xfc ) == 0x00 )
102 es_format_Init( &tk->fmt, SPU_ES, VLC_FOURCC('c','v','d',' ') );
104 else if( ( i_id&0xff ) == 0x10 )
106 es_format_Init( &tk->fmt, SPU_ES, VLC_FOURCC('t','e','l','x') );
110 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
114 else if( (i_id&0xff00) == 0xfd00 )
116 uint8_t i_sub_id = i_id & 0xff;
117 if( i_sub_id >= 0x55 && i_sub_id <= 0x5f )
119 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('W','V','C','1') );
123 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
129 int i_type = ps_id_to_type( p_psm , i_id );
131 es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
133 if( (i_id&0xf0) == 0xe0 && i_type == 0x1b )
135 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('h','2','6','4') );
137 else if( (i_id&0xf0) == 0xe0 && i_type == 0x10 )
139 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('m','p','4','v') );
141 else if( (i_id&0xf0) == 0xe0 && i_type == 0x02 )
143 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('m','p','g','v') );
145 else if( ( i_id&0xe0 ) == 0xc0 && i_type == 0x0f )
147 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('m','p','4','a') );
149 else if( ( i_id&0xe0 ) == 0xc0 && i_type == 0x03 )
151 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('m','p','g','a') );
154 if( tk->fmt.i_cat == UNKNOWN_ES && ( i_id&0xf0 ) == 0xe0 )
156 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('m','p','g','v') );
158 else if( tk->fmt.i_cat == UNKNOWN_ES && ( i_id&0xe0 ) == 0xc0 )
160 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('m','p','g','a') );
162 else if( tk->fmt.i_cat == UNKNOWN_ES ) return VLC_EGENERIC;
165 /* PES packets usually contain truncated frames */
166 tk->fmt.b_packetized = false;
168 if( ps_id_to_lang( p_psm, i_id ) )
170 tk->fmt.psz_language = malloc( 4 );
171 memcpy( tk->fmt.psz_language, ps_id_to_lang( p_psm , i_id ), 3 );
172 tk->fmt.psz_language[3] = 0;
178 /* return the id of a PES (should be valid) */
179 static inline int ps_pkt_id( block_t *p_pkt )
181 if( p_pkt->p_buffer[3] == 0xbd &&
182 p_pkt->i_buffer >= 9 &&
183 p_pkt->i_buffer >= 9 + p_pkt->p_buffer[8] )
186 return 0xbd00 | p_pkt->p_buffer[9+p_pkt->p_buffer[8]];
188 else if( p_pkt->p_buffer[3] == 0xfd &&
189 p_pkt->i_buffer >= 9 &&
190 (p_pkt->p_buffer[6]&0xC0) == 0x80 && /* mpeg2 */
191 (p_pkt->p_buffer[7]&0x01) == 0x01 ) /* extension_flag */
193 /* ISO 13818 amendment 2 and SMPTE RP 227 */
194 const uint8_t i_flags = p_pkt->p_buffer[7];
195 unsigned int i_skip = 9;
197 /* Find PES extension */
198 if( (i_flags & 0x80 ) )
200 i_skip += 5; /* pts */
201 if( (i_flags & 0x40) )
202 i_skip += 5; /* dts */
204 if( (i_flags & 0x20 ) )
206 if( (i_flags & 0x10 ) )
208 if( (i_flags & 0x08 ) )
210 if( (i_flags & 0x04 ) )
212 if( (i_flags & 0x02 ) )
215 if( i_skip < p_pkt->i_buffer && (p_pkt->p_buffer[i_skip]&0x01) )
217 const uint8_t i_flags2 = p_pkt->p_buffer[i_skip];
219 /* Find PES extension 2 */
221 if( i_flags2 & 0x80 )
223 if( (i_flags2 & 0x40) && i_skip < p_pkt->i_buffer )
224 i_skip += 1 + p_pkt->p_buffer[i_skip];
225 if( i_flags2 & 0x20 )
227 if( i_flags2 & 0x10 )
230 if( i_skip + 1 < p_pkt->i_buffer )
232 const int i_extension_field_length = p_pkt->p_buffer[i_skip]&0x7f;
233 if( i_extension_field_length >=1 )
235 int i_stream_id_extension_flag = (p_pkt->p_buffer[i_skip+1] >> 7)&0x1;
236 if( i_stream_id_extension_flag == 0 )
237 return 0xfd00 | (p_pkt->p_buffer[i_skip+1]&0x7f);
242 return p_pkt->p_buffer[3];
245 /* return the size of the next packet
246 * XXX you need to give him at least 14 bytes (and it need to start as a
248 static inline int ps_pkt_size( const uint8_t *p, int i_peek )
250 if( p[3] == 0xb9 && i_peek >= 4 )
254 else if( p[3] == 0xba )
256 if( (p[4] >> 6) == 0x01 && i_peek >= 14 )
258 return 14 + (p[13]&0x07);
260 else if( (p[4] >> 4) == 0x02 && i_peek >= 12 )
266 else if( i_peek >= 6 )
268 return 6 + ((p[4]<<8) | p[5] );
273 /* parse a PACK PES */
274 static inline int ps_pkt_parse_pack( block_t *p_pkt, int64_t *pi_scr,
277 uint8_t *p = p_pkt->p_buffer;
278 if( p_pkt->i_buffer >= 14 && (p[4] >> 6) == 0x01 )
280 *pi_scr =((((int64_t)p[4]&0x38) << 27 )|
281 (((int64_t)p[4]&0x03) << 28 )|
282 ((int64_t)p[5] << 20 )|
283 (((int64_t)p[6]&0xf8) << 12 )|
284 (((int64_t)p[6]&0x03) << 13 )|
285 ((int64_t)p[7] << 5 )|
286 ((int64_t)p[8] >> 3 )) * 100 / 9;
288 *pi_mux_rate = ( p[10] << 14 )|( p[11] << 6 )|( p[12] >> 2);
290 else if( p_pkt->i_buffer >= 12 && (p[4] >> 4) == 0x02 )
292 *pi_scr =((((int64_t)p[4]&0x0e) << 29 )|
293 ((int64_t)p[5] << 22 )|
294 (((int64_t)p[6]&0xfe) << 14 )|
295 ((int64_t)p[7] << 7 )|
296 ((int64_t)p[8] >> 1 )) * 100 / 9;
298 *pi_mux_rate = ( ( p[9]&0x7f )<< 15 )|( p[10] << 7 )|( p[11] >> 1);
307 /* Parse a SYSTEM PES */
308 static inline int ps_pkt_parse_system( block_t *p_pkt, ps_psm_t *p_psm,
309 ps_track_t tk[PS_TK_COUNT] )
311 uint8_t *p = &p_pkt->p_buffer[6 + 3 + 1 + 1 + 1];
313 /* System header is not useable if it references private streams (0xBD)
314 * or 'all audio streams' (0xB8) or 'all video streams' (0xB9) */
315 while( p < &p_pkt->p_buffer[p_pkt->i_buffer] )
319 /* fprintf( stderr, " SYSTEM_START_CODEEE: id=0x%x\n", p[0] ); */
320 if( p[0] >= 0xBC || p[0] == 0xB8 || p[0] == 0xB9 ) p += 2;
325 int i_tk = PS_ID_TO_TK( i_id );
327 if( !tk[i_tk].b_seen )
329 if( !ps_track_fill( &tk[i_tk], p_psm, i_id ) )
331 tk[i_tk].b_seen = true;
339 /* Parse a PES (and skip i_skip_extra in the payload) */
340 static inline int ps_pkt_parse_pes( block_t *p_pes, int i_skip_extra )
343 unsigned int i_skip = 0;
345 memcpy( header, p_pes->p_buffer, __MIN( p_pes->i_buffer, 30 ) );
349 case 0xBC: /* Program stream map */
350 case 0xBE: /* Padding */
351 case 0xBF: /* Private stream 2 */
354 case 0xFF: /* Program stream directory */
355 case 0xF2: /* DSMCC stream */
356 case 0xF8: /* ITU-T H.222.1 type E stream */
361 if( ( header[6]&0xC0 ) == 0x80 )
364 i_skip = header[8] + 9;
366 if( header[7]&0x80 ) /* has pts */
368 p_pes->i_pts = ((mtime_t)(header[ 9]&0x0e ) << 29)|
369 (mtime_t)(header[10] << 22)|
370 ((mtime_t)(header[11]&0xfe) << 14)|
371 (mtime_t)(header[12] << 7)|
372 (mtime_t)(header[13] >> 1);
374 if( header[7]&0x40 ) /* has dts */
376 p_pes->i_dts = ((mtime_t)(header[14]&0x0e ) << 29)|
377 (mtime_t)(header[15] << 22)|
378 ((mtime_t)(header[16]&0xfe) << 14)|
379 (mtime_t)(header[17] << 7)|
380 (mtime_t)(header[18] >> 1);
387 while( i_skip < 23 && header[i_skip] == 0xff )
393 /* msg_Err( p_demux, "too much MPEG-1 stuffing" ); */
396 if( ( header[i_skip] & 0xC0 ) == 0x40 )
401 if( header[i_skip]&0x20 )
403 p_pes->i_pts = ((mtime_t)(header[i_skip]&0x0e ) << 29)|
404 (mtime_t)(header[i_skip+1] << 22)|
405 ((mtime_t)(header[i_skip+2]&0xfe) << 14)|
406 (mtime_t)(header[i_skip+3] << 7)|
407 (mtime_t)(header[i_skip+4] >> 1);
409 if( header[i_skip]&0x10 ) /* has dts */
411 p_pes->i_dts = ((mtime_t)(header[i_skip+5]&0x0e ) << 29)|
412 (mtime_t)(header[i_skip+6] << 22)|
413 ((mtime_t)(header[i_skip+7]&0xfe) << 14)|
414 (mtime_t)(header[i_skip+8] << 7)|
415 (mtime_t)(header[i_skip+9] >> 1);
430 i_skip += i_skip_extra;
432 if( p_pes->i_buffer <= i_skip )
437 p_pes->p_buffer += i_skip;
438 p_pes->i_buffer -= i_skip;
440 p_pes->i_dts = 100 * p_pes->i_dts / 9;
441 p_pes->i_pts = 100 * p_pes->i_pts / 9;
446 /* Program stream map handling */
447 typedef struct ps_es_t
453 uint8_t *p_descriptor;
455 /* Language is iso639-2T */
468 static inline int ps_id_to_type( const ps_psm_t *p_psm, int i_id )
471 for( i = 0; p_psm && i < p_psm->i_es; i++ )
473 if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->i_type;
478 static inline const uint8_t *ps_id_to_lang( const ps_psm_t *p_psm, int i_id )
481 for( i = 0; p_psm && i < p_psm->i_es; i++ )
483 if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->lang;
488 static inline void ps_psm_init( ps_psm_t *p_psm )
490 p_psm->i_version = 0xFFFF;
495 static inline void ps_psm_destroy( ps_psm_t *p_psm )
497 while( p_psm->i_es-- )
499 free( p_psm->es[p_psm->i_es]->p_descriptor );
500 free( p_psm->es[p_psm->i_es] );
508 static inline int ps_psm_fill( ps_psm_t *p_psm, block_t *p_pkt,
509 ps_track_t tk[PS_TK_COUNT], es_out_t *out )
511 int i_buffer = p_pkt->i_buffer;
512 uint8_t *p_buffer = p_pkt->p_buffer;
513 int i_length, i_version, i_info_length, i_esm_length, i_es_base, i;
515 if( !p_psm || p_buffer[3] != 0xbc ) return VLC_EGENERIC;
517 i_length = (uint16_t)(p_buffer[4] << 8) + p_buffer[5] + 6;
518 if( i_length > i_buffer ) return VLC_EGENERIC;
520 //i_current_next_indicator = (p_buffer[6] && 0x01);
521 i_version = (p_buffer[6] && 0xf8);
523 if( p_psm->i_version == i_version ) return VLC_EGENERIC;
525 ps_psm_destroy( p_psm );
527 i_info_length = (uint16_t)(p_buffer[8] << 8) + p_buffer[9];
528 if( i_info_length + 10 > i_length ) return VLC_EGENERIC;
530 /* Elementary stream map */
531 i_esm_length = (uint16_t)(p_buffer[ 10 + i_info_length ] << 8) +
532 p_buffer[ 11 + i_info_length];
533 i_es_base = 12 + i_info_length;
535 while( i_es_base + 4 < i_length )
538 es.lang[0] = es.lang[1] = es.lang[2] = 0;
540 es.i_type = p_buffer[ i_es_base ];
541 es.i_id = p_buffer[ i_es_base + 1 ];
542 i_info_length = (uint16_t)(p_buffer[ i_es_base + 2 ] << 8) +
543 p_buffer[ i_es_base + 3 ];
545 if( i_es_base + 4 + i_info_length > i_length ) break;
547 /* TODO Add support for VC-1 stream:
548 * stream_type=0xea, stream_id=0xfd AND registration
549 * descriptor 0x5 with format_identifier == 0x56432D31 (VC-1)
550 * (I need a sample that use PSM with VC-1) */
553 es.i_descriptor = i_info_length;
554 if( i_info_length > 0 )
558 es.p_descriptor = malloc( i_info_length );
559 memcpy( es.p_descriptor, p_buffer + i_es_base + 4, i_info_length);
561 while( i <= es.i_descriptor - 2 )
563 /* Look for the ISO639 language descriptor */
564 if( es.p_descriptor[i] != 0x0a )
566 i += es.p_descriptor[i+1] + 2;
570 if( i <= es.i_descriptor - 6 )
572 es.lang[0] = es.p_descriptor[i+2];
573 es.lang[1] = es.p_descriptor[i+3];
574 es.lang[2] = es.p_descriptor[i+4];
580 p_psm->es = realloc( p_psm->es, sizeof(ps_es_t *) * (p_psm->i_es+1) );
581 p_psm->es[p_psm->i_es] = malloc( sizeof(ps_es_t) );
582 *p_psm->es[p_psm->i_es++] = es;
583 i_es_base += 4 + i_info_length;
588 p_psm->i_version = i_version;
590 /* Check/Modify our existing tracks */
591 for( i = 0; i < PS_TK_COUNT; i++ )
595 if( !tk[i].b_seen || !tk[i].es ) continue;
597 if( ps_track_fill( &tk_tmp, p_psm, tk[i].i_id ) != VLC_SUCCESS )
600 if( tk_tmp.fmt.i_codec == tk[i].fmt.i_codec ) continue;
602 es_out_Del( out, tk[i].es );
605 tk[i].es = es_out_Add( out, &tk[i].fmt );