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];
198 /* Find PES extension */
199 if( (i_flags & 0x80 ) )
201 i_skip += 5; /* pts */
202 if( (i_flags & 0x40) )
203 i_skip += 5; /* dts */
205 if( (i_flags & 0x20 ) )
207 if( (i_flags & 0x10 ) )
209 if( (i_flags & 0x08 ) )
211 if( (i_flags & 0x04 ) )
213 if( (i_flags & 0x02 ) )
216 if( i_skip < p_pkt->i_buffer && (p_pkt->p_buffer[i_skip]&0x01) )
218 const uint8_t i_flags2 = p_pkt->p_buffer[i_skip];
220 /* Find PES extension 2 */
222 if( i_flags2 & 0x80 )
224 if( (i_flags2 & 0x40) && i_skip < p_pkt->i_buffer )
225 i_skip += 1 + p_pkt->p_buffer[i_skip];
226 if( i_flags2 & 0x20 )
228 if( i_flags2 & 0x10 )
231 if( i_skip + 1 < p_pkt->i_buffer )
233 const int i_extension_field_length = p_pkt->p_buffer[i_skip]&0x7f;
234 if( i_extension_field_length >=1 )
236 int i_stream_id_extension_flag = (p_pkt->p_buffer[i_skip+1] >> 7)&0x1;
237 if( i_stream_id_extension_flag == 0 )
238 return 0xfd00 | (p_pkt->p_buffer[i_skip+1]&0x7f);
243 return p_pkt->p_buffer[3];
246 /* return the size of the next packet
247 * XXX you need to give him at least 14 bytes (and it need to start as a
249 static inline int ps_pkt_size( const uint8_t *p, int i_peek )
251 if( p[3] == 0xb9 && i_peek >= 4 )
255 else if( p[3] == 0xba )
257 if( (p[4] >> 6) == 0x01 && i_peek >= 14 )
259 return 14 + (p[13]&0x07);
261 else if( (p[4] >> 4) == 0x02 && i_peek >= 12 )
267 else if( i_peek >= 6 )
269 return 6 + ((p[4]<<8) | p[5] );
274 /* parse a PACK PES */
275 static inline int ps_pkt_parse_pack( block_t *p_pkt, int64_t *pi_scr,
278 uint8_t *p = p_pkt->p_buffer;
279 if( p_pkt->i_buffer >= 14 && (p[4] >> 6) == 0x01 )
281 *pi_scr =((((int64_t)p[4]&0x38) << 27 )|
282 (((int64_t)p[4]&0x03) << 28 )|
283 ((int64_t)p[5] << 20 )|
284 (((int64_t)p[6]&0xf8) << 12 )|
285 (((int64_t)p[6]&0x03) << 13 )|
286 ((int64_t)p[7] << 5 )|
287 ((int64_t)p[8] >> 3 )) * 100 / 9;
289 *pi_mux_rate = ( p[10] << 14 )|( p[11] << 6 )|( p[12] >> 2);
291 else if( p_pkt->i_buffer >= 12 && (p[4] >> 4) == 0x02 )
293 *pi_scr =((((int64_t)p[4]&0x0e) << 29 )|
294 ((int64_t)p[5] << 22 )|
295 (((int64_t)p[6]&0xfe) << 14 )|
296 ((int64_t)p[7] << 7 )|
297 ((int64_t)p[8] >> 1 )) * 100 / 9;
299 *pi_mux_rate = ( ( p[9]&0x7f )<< 15 )|( p[10] << 7 )|( p[11] >> 1);
308 /* Parse a SYSTEM PES */
309 static inline int ps_pkt_parse_system( block_t *p_pkt, ps_psm_t *p_psm,
310 ps_track_t tk[PS_TK_COUNT] )
312 uint8_t *p = &p_pkt->p_buffer[6 + 3 + 1 + 1 + 1];
314 /* System header is not useable if it references private streams (0xBD)
315 * or 'all audio streams' (0xB8) or 'all video streams' (0xB9) */
316 while( p < &p_pkt->p_buffer[p_pkt->i_buffer] )
320 /* fprintf( stderr, " SYSTEM_START_CODEEE: id=0x%x\n", p[0] ); */
321 if( p[0] >= 0xBC || p[0] == 0xB8 || p[0] == 0xB9 ) p += 2;
326 int i_tk = PS_ID_TO_TK( i_id );
328 if( !tk[i_tk].b_seen )
330 if( !ps_track_fill( &tk[i_tk], p_psm, i_id ) )
332 tk[i_tk].b_seen = true;
340 /* Parse a PES (and skip i_skip_extra in the payload) */
341 static inline int ps_pkt_parse_pes( block_t *p_pes, int i_skip_extra )
346 memcpy( header, p_pes->p_buffer, __MIN( p_pes->i_buffer, 30 ) );
350 case 0xBC: /* Program stream map */
351 case 0xBE: /* Padding */
352 case 0xBF: /* Private stream 2 */
355 case 0xFF: /* Program stream directory */
356 case 0xF2: /* DSMCC stream */
357 case 0xF8: /* ITU-T H.222.1 type E stream */
362 if( ( header[6]&0xC0 ) == 0x80 )
365 i_skip = header[8] + 9;
367 if( header[7]&0x80 ) /* has pts */
369 p_pes->i_pts = ((mtime_t)(header[ 9]&0x0e ) << 29)|
370 (mtime_t)(header[10] << 22)|
371 ((mtime_t)(header[11]&0xfe) << 14)|
372 (mtime_t)(header[12] << 7)|
373 (mtime_t)(header[13] >> 1);
375 if( header[7]&0x40 ) /* has dts */
377 p_pes->i_dts = ((mtime_t)(header[14]&0x0e ) << 29)|
378 (mtime_t)(header[15] << 22)|
379 ((mtime_t)(header[16]&0xfe) << 14)|
380 (mtime_t)(header[17] << 7)|
381 (mtime_t)(header[18] >> 1);
388 while( i_skip < 23 && header[i_skip] == 0xff )
394 /* msg_Err( p_demux, "too much MPEG-1 stuffing" ); */
397 if( ( header[i_skip] & 0xC0 ) == 0x40 )
402 if( header[i_skip]&0x20 )
404 p_pes->i_pts = ((mtime_t)(header[i_skip]&0x0e ) << 29)|
405 (mtime_t)(header[i_skip+1] << 22)|
406 ((mtime_t)(header[i_skip+2]&0xfe) << 14)|
407 (mtime_t)(header[i_skip+3] << 7)|
408 (mtime_t)(header[i_skip+4] >> 1);
410 if( header[i_skip]&0x10 ) /* has dts */
412 p_pes->i_dts = ((mtime_t)(header[i_skip+5]&0x0e ) << 29)|
413 (mtime_t)(header[i_skip+6] << 22)|
414 ((mtime_t)(header[i_skip+7]&0xfe) << 14)|
415 (mtime_t)(header[i_skip+8] << 7)|
416 (mtime_t)(header[i_skip+9] >> 1);
431 i_skip += i_skip_extra;
433 if( p_pes->i_buffer <= i_skip )
438 p_pes->p_buffer += i_skip;
439 p_pes->i_buffer -= i_skip;
441 p_pes->i_dts = 100 * p_pes->i_dts / 9;
442 p_pes->i_pts = 100 * p_pes->i_pts / 9;
447 /* Program stream map handling */
448 typedef struct ps_es_t
454 uint8_t *p_descriptor;
456 /* Language is iso639-2T */
469 static inline int ps_id_to_type( const ps_psm_t *p_psm, int i_id )
472 for( i = 0; p_psm && i < p_psm->i_es; i++ )
474 if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->i_type;
479 static inline const uint8_t *ps_id_to_lang( const ps_psm_t *p_psm, int i_id )
482 for( i = 0; p_psm && i < p_psm->i_es; i++ )
484 if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->lang;
489 static inline void ps_psm_init( ps_psm_t *p_psm )
491 p_psm->i_version = 0xFFFF;
496 static inline void ps_psm_destroy( ps_psm_t *p_psm )
498 while( p_psm->i_es-- )
500 free( p_psm->es[p_psm->i_es]->p_descriptor );
501 free( p_psm->es[p_psm->i_es] );
509 static inline int ps_psm_fill( ps_psm_t *p_psm, block_t *p_pkt,
510 ps_track_t tk[PS_TK_COUNT], es_out_t *out )
512 int i_buffer = p_pkt->i_buffer;
513 uint8_t *p_buffer = p_pkt->p_buffer;
514 int i_length, i_version, i_info_length, i_esm_length, i_es_base, i;
516 if( !p_psm || p_buffer[3] != 0xbc ) return VLC_EGENERIC;
518 i_length = (uint16_t)(p_buffer[4] << 8) + p_buffer[5] + 6;
519 if( i_length > i_buffer ) return VLC_EGENERIC;
521 //i_current_next_indicator = (p_buffer[6] && 0x01);
522 i_version = (p_buffer[6] && 0xf8);
524 if( p_psm->i_version == i_version ) return VLC_EGENERIC;
526 ps_psm_destroy( p_psm );
528 i_info_length = (uint16_t)(p_buffer[8] << 8) + p_buffer[9];
529 if( i_info_length + 10 > i_length ) return VLC_EGENERIC;
531 /* Elementary stream map */
532 i_esm_length = (uint16_t)(p_buffer[ 10 + i_info_length ] << 8) +
533 p_buffer[ 11 + i_info_length];
534 i_es_base = 12 + i_info_length;
536 while( i_es_base + 4 < i_length )
539 es.lang[0] = es.lang[1] = es.lang[2] = 0;
541 es.i_type = p_buffer[ i_es_base ];
542 es.i_id = p_buffer[ i_es_base + 1 ];
543 i_info_length = (uint16_t)(p_buffer[ i_es_base + 2 ] << 8) +
544 p_buffer[ i_es_base + 3 ];
546 if( i_es_base + 4 + i_info_length > i_length ) break;
548 /* TODO Add support for VC-1 stream:
549 * stream_type=0xea, stream_id=0xfd AND registration
550 * descriptor 0x5 with format_identifier == 0x56432D31 (VC-1)
551 * (I need a sample that use PSM with VC-1) */
554 es.i_descriptor = i_info_length;
555 if( i_info_length > 0 )
559 es.p_descriptor = malloc( i_info_length );
560 memcpy( es.p_descriptor, p_buffer + i_es_base + 4, i_info_length);
562 while( i <= es.i_descriptor - 2 )
564 /* Look for the ISO639 language descriptor */
565 if( es.p_descriptor[i] != 0x0a )
567 i += es.p_descriptor[i+1] + 2;
571 if( i <= es.i_descriptor - 6 )
573 es.lang[0] = es.p_descriptor[i+2];
574 es.lang[1] = es.p_descriptor[i+3];
575 es.lang[2] = es.p_descriptor[i+4];
581 p_psm->es = realloc( p_psm->es, sizeof(ps_es_t *) * (p_psm->i_es+1) );
582 p_psm->es[p_psm->i_es] = malloc( sizeof(ps_es_t) );
583 *p_psm->es[p_psm->i_es++] = es;
584 i_es_base += 4 + i_info_length;
589 p_psm->i_version = i_version;
591 /* Check/Modify our existing tracks */
592 for( i = 0; i < PS_TK_COUNT; i++ )
596 if( !tk[i].b_seen || !tk[i].es ) continue;
598 if( ps_track_fill( &tk_tmp, p_psm, tk[i].i_id ) != VLC_SUCCESS )
601 if( tk_tmp.fmt.i_codec == tk[i].fmt.i_codec ) continue;
603 es_out_Del( out, tk[i].es );
606 tk[i].es = es_out_Add( out, &tk[i].fmt );