1 /*****************************************************************************
2 * ty.c - TiVo ty stream video demuxer for VLC
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
5 * Copyright (C) 2005 by Neal Symms (tivo@freakinzoo.com) - February 2005
6 * based on code by Christopher Wingert for tivo-mplayer
7 * tivo(at)wingert.org, February 2003
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
26 * v1.0.0 - 24-Feb-2005 - Initial release - Series 1 support ONLY!
27 * v1.0.1 - 25-Feb-2005 - Added fix for bad GOP headers - Neal
28 * v1.0.2 - 26-Feb-2005 - No longer require "seekable" input stream - Neal
29 *****************************************************************************/
31 /*****************************************************************************
33 *****************************************************************************/
37 #include <vlc/input.h>
38 #include "vlc_codec.h"
40 #define SERIES1_PES_LENGTH (11)
41 #define SERIES2_PES_LENGTH (16)
42 #define AC3_PES_LENGTH (14)
43 #define DTIVO_PTS_OFFSET (6)
44 #define SA_PTS_OFFSET (9)
45 #define AC3_PTS_OFFSET (9)
46 static const unsigned char ty_VideoPacket[] = { 0x00, 0x00, 0x01, 0xe0 };
47 static const unsigned char ty_MPEGAudioPacket[] = { 0x00, 0x00, 0x01, 0xc0 };
48 static const unsigned char ty_AC3AudioPacket[] = { 0x00, 0x00, 0x01, 0xbd };
50 /*****************************************************************************
52 *****************************************************************************/
53 static int get_chunk_header(demux_t *);
54 static void setup_audio_streams(char, demux_t *);
55 static mtime_t get_pts( unsigned char *buf );
56 static int find_es_header( unsigned const char *header,
57 unsigned char *buffer, int bufferSize, int *esOffset1 );
58 static int ty_stream_seek(demux_t *p_demux, double seek_pct);
60 static int TyOpen (vlc_object_t *);
61 static void TyClose(vlc_object_t *);
62 static int TyDemux(demux_t *);
63 static int Control(demux_t *, int, va_list);
65 /*****************************************************************************
67 *****************************************************************************/
69 set_shortname( "TY" );
70 set_description(_("TY Stream audio/video demux"));
71 set_category( CAT_INPUT );
72 set_subcategory( SUBCAT_INPUT_DEMUX );
73 set_capability("demux2", 8);
74 /* FIXME: there seems to be a segfault when using PVR access
75 * and TY demux has a bigger priority than PS
76 * Something must be wrong.
78 set_callbacks(TyOpen, TyClose);
83 /* packet types for reference:
84 2/c0: audio data continued
85 3/c0: audio packet header (PES header)
86 4/c0: audio data (S/A only?)
87 9/c0: audio packet header, AC-3 audio
88 2/e0: video data continued
89 6/e0: video packet header (PES header)
90 7/e0: video sequence header start
91 8/e0: video I-frame header start
92 a/e0: video P-frame header start
93 b/e0: video B-frame header start
94 c/e0: video GOP header start
95 e/01: closed-caption data
96 e/02: Extended data services data
97 e/03: ipreview data ("thumbs up to record" signal)
100 #define TIVO_PES_FILEID ( 0xf5467abd )
101 #define TIVO_PART_LENGTH ( 0x20000000 ) /* 536,870,912 bytes */
102 #define CHUNK_SIZE ( 128 * 1024 )
107 unsigned char ex1, ex2;
108 unsigned char rec_type;
109 unsigned char subrec_type;
115 es_out_id_t *p_video; /* ptr to video codec */
116 es_out_id_t *p_audio; /* holds either ac3 or mpeg codec ptr */
120 size_t i_stream_size; /* size of input stream (if known) */
121 vlc_bool_t b_seekable; /* is this stream seekable? */
122 int tivoType; /* 1 = SA, 2 = DTiVo */
123 vlc_bool_t b_mpeg_audio; /* true if we're using MPEG audio */
124 uint8_t pes_buffer[20]; /* holds incomplete pes headers */
125 int i_pes_buf_cnt; /* how many bytes in our buffer */
127 mtime_t firstAudioPTS;
128 mtime_t lastAudioPTS;
129 mtime_t lastVideoPTS;
131 ty_rec_hdr_t *rec_hdrs; /* record headers array */
132 int i_cur_rec; /* current record in this chunk */
133 int i_num_recs; /* number of recs in this chunk */
134 int i_seq_rec; /* record number where seq start is */
136 vlc_bool_t b_first_chunk;
141 * TyOpen: check file and initialize demux structures
144 * 1. peek at the first 12 bytes of the stream for the
145 * magic TiVo PART header & stream type & chunk size
146 * 2. if it's not there, error with VLC_EGENERIC
147 * 3. set up video (mpgv) codec
148 * 4. return VLC_SUCCESS
150 static int TyOpen(vlc_object_t *p_this)
152 demux_t *p_demux = (demux_t *)p_this;
157 /* peek at the first 12 bytes. */
158 /* for TY streams, they're always the same */
159 if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 )
162 if ( U32_AT(p_peek) != TIVO_PES_FILEID ||
163 U32_AT(&p_peek[4]) != 0x02 ||
164 U32_AT(&p_peek[8]) != CHUNK_SIZE )
166 /* doesn't look like a TY file... */
167 char *psz_ext = strrchr(p_demux->psz_path, '.');
169 if( !p_demux->b_force &&
170 (!psz_ext || strcasecmp(psz_ext, ".ty")) ) return VLC_EGENERIC;
171 msg_Warn( p_demux, "this does not look like a TY file, "
172 "continuing anyway..." );
175 /* at this point, we assume we have a valid TY stream */
176 msg_Dbg( p_demux, "valid TY stream detected" );
178 /* Set exported functions */
179 p_demux->pf_demux = TyDemux;
180 p_demux->pf_control = Control;
182 /* create our structure that will hold all data */
183 p_demux->p_sys = p_sys = malloc(sizeof(demux_sys_t));
184 memset(p_sys, 0, sizeof(demux_sys_t));
186 /* set up our struct (most were zero'd out with the memset above) */
187 p_sys->b_first_chunk = VLC_TRUE;
188 p_sys->firstAudioPTS = -1;
189 p_sys->i_stream_size = stream_Size(p_demux->s);
190 p_sys->b_mpeg_audio = VLC_FALSE;
192 /* see if this stream is seekable */
193 stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable );
195 /* TODO: read first chunk & parse first audio PTS, then (if seekable)
196 * seek to last chunk & last record; read its PTS and compute
197 * overall program time. Also determine Tivo type. */
199 /* NOTE: we wait to create the audio ES until we know what
200 * audio type we have. */
201 p_sys->p_audio = NULL;
203 /* register the video stream */
204 es_format_Init( &fmt, VIDEO_ES, VLC_FOURCC( 'm', 'p', 'g', 'v' ) );
205 p_sys->p_video = es_out_Add( p_demux->out, &fmt );
208 /* register the CC decoder */
209 es_format_Init( &fmt, SPU_ES, VLC_FOURCC('s', 'u', 'b', 't'));
210 p_sys->p_subt_es = es_out_Add(p_demux->out, &fmt);
217 /* set up audio codec.
218 * this will be called once we determine audio type */
219 static void setup_audio_streams(char stream_type, demux_t *p_demux)
221 demux_sys_t *p_sys = p_demux->p_sys;
224 if (stream_type == 'A') {
225 /* AC3 audio detected */
226 es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'a', '5', '2', ' ' ) );
227 p_sys->tivoType = 2; /* AC3 is only on dtivo */
230 es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'm', 'p', 'g', 'a' ) );
231 p_sys->b_mpeg_audio = VLC_TRUE;
233 /* register the chosen audio output codec */
234 p_sys->p_audio = es_out_Add( p_demux->out, &fmt );
238 /* =========================================================================== */
239 /* Compute Presentation Time Stamp (PTS)
240 * Assume buf points to beginning of PTS */
241 static mtime_t get_pts( unsigned char *buf )
245 i_pts = ((mtime_t)(buf[0]&0x0e ) << 29)|
246 (mtime_t)(buf[1] << 22)|
247 ((mtime_t)(buf[2]&0xfe) << 14)|
248 (mtime_t)(buf[3] << 7)|
249 (mtime_t)(buf[4] >> 1);
250 i_pts *= 100 / 9; /* convert PTS (90Khz clock) to microseconds */
255 /* =========================================================================== */
256 static int find_es_header( unsigned const char *header,
257 unsigned char *buffer, int bufferSize, int *esOffset1 )
262 for( count = 0 ; count < bufferSize ; count++ )
264 if ( ( buffer[ count + 0 ] == header[ 0 ] ) &&
265 ( buffer[ count + 1 ] == header[ 1 ] ) &&
266 ( buffer[ count + 2 ] == header[ 2 ] ) &&
267 ( buffer[ count + 3 ] == header[ 3 ] ) )
277 /* =========================================================================== */
278 /* check if we have a full PES header, if not, then save what we have.
279 * this is called when audio-start packets are encountered.
281 * 1 partial PES hdr found, some audio data found (buffer adjusted),
282 * -1 partial PES hdr found, no audio data found
283 * 0 otherwise (complete PES found, pts extracted, pts set, buffer adjusted) */
284 /* TODO: fix it so it works with S2 / SA / DTivo / HD etc... */
285 static int check_sync_pes( demux_t *p_demux, block_t *p_block,
286 int32_t offset, int32_t rec_len )
288 demux_sys_t *p_sys = p_demux->p_sys;
290 int pes_length = p_sys->b_mpeg_audio?SERIES1_PES_LENGTH:AC3_PES_LENGTH;
292 if( p_sys->tivoType == 1 )
295 pts_offset = SA_PTS_OFFSET;
300 pts_offset = p_sys->b_mpeg_audio?DTIVO_PTS_OFFSET:AC3_PTS_OFFSET;
302 if ( offset < 0 || offset + pes_length > rec_len )
304 /* entire PES header not present */
305 msg_Dbg( p_demux, "PES header at %d not complete in record. storing.",
307 /* save the partial pes header */
310 /* no header found, fake some 00's (this works, believe me) */
311 memset( p_sys->pes_buffer, 4, 0 );
312 p_sys->i_pes_buf_cnt = 4;
314 msg_Err( p_demux, "PES header not found in record of %d bytes!",
318 /* copy the partial pes header we found */
319 memcpy( p_sys->pes_buffer, p_block->p_buffer + offset,
321 p_sys->i_pes_buf_cnt = rec_len - offset;
325 /* PES Header was found, but not complete, so trim the end of this record */
326 p_block->i_buffer -= rec_len - offset;
329 return -1; /* partial PES, no audio data */
331 /* full PES header present, extract PTS */
332 p_sys->lastAudioPTS = get_pts( &p_block->p_buffer[ offset + pts_offset ] );
333 if (p_sys->firstAudioPTS < 0)
334 p_sys->firstAudioPTS = p_sys->lastAudioPTS;
335 p_block->i_pts = p_sys->lastAudioPTS;
336 /*msg_Dbg(p_demux, "Audio PTS %lld", p_sys->lastAudioPTS );*/
337 /* adjust audio record to remove PES header */
338 memmove(p_block->p_buffer + offset, p_block->p_buffer + offset + pes_length,
339 rec_len - pes_length);
340 p_block->i_buffer -= pes_length;
345 /* =========================================================================== */
346 /* TyDemux: Read & Demux one record from the chunk
348 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
350 * NOTE: I think we can return the number of packets sent instead of just 1.
351 * that means we can demux an entire chunk and shoot it back (may be more efficient)
352 * -- should try that some day :) --
354 int TyDemux(demux_t *p_demux)
357 int recordsDecoded = 0;
363 ty_rec_hdr_t *rec_hdr;
365 block_t *p_block_in = NULL;
368 unsigned char lastCC[ 16 ];
369 unsigned char lastXDS[ 16 ];
371 demux_sys_t *p_sys = p_demux->p_sys;
373 /*msg_Dbg(p_demux, "ty demux processing" );*/
375 /* did we hit EOF earlier? */
376 if (p_sys->eof) return 0;
379 * what we do (1 record now.. maybe more later):
380 * - use stream_Read() to read the chunk header & record headers
381 * - discard entire chunk if it is a PART header chunk
382 * - parse all the headers into record header array
383 * - keep a pointer of which record we're on
384 * - use stream_Block() to fetch each record
385 * - parse out PTS from PES headers
386 * - set PTS for data packets
387 * - pass the data on to the proper codec via es_out_Send()
389 * if this is the first time or
390 * if we're at the end of this chunk, start a new one
392 /* parse the next chunk's record headers */
393 if (p_sys->b_first_chunk || p_sys->i_cur_rec >= p_sys->i_num_recs)
394 if (get_chunk_header(p_demux) == 0)
397 /*======================================================================
398 * parse & send one record of the chunk
399 *====================================================================== */
400 i_cur_rec = p_sys->i_cur_rec;
402 rec_hdr = &p_sys->rec_hdrs[ i_cur_rec ];
403 subrec_type = rec_hdr->subrec_type;
404 rec_type = rec_hdr->rec_type;
405 l_rec_size = rec_hdr->l_rec_size;
409 /*msg_Dbg(p_demux, "Record Type 0x%x/%02x %ld bytes",
410 subrec_type, rec_type, l_rec_size );*/
412 /* some normal records are 0 length, so check for that... */
415 /* read in this record's payload */
416 if( !( p_block_in = stream_Block( p_demux->s, l_rec_size ) ) )
422 /* set these as 'unknown' for now */
423 p_block_in->i_pts = p_block_in->i_dts = 0;
427 /* no data in payload; we're done */
434 -- don't read any data from the stream, data was in the record header --
436 "Record Type 0x%02x/%02x, ext data = %02x, %02x", subrec_type,
437 rec_type, rec_hdr->ex1, rec_hdr->ex2);
440 /*================================================================*
442 *================================================================*/
443 if ( rec_type == 0xe0 )
445 if( subrec_type == 0x06 )
447 /* get the PTS from this packet.
448 * Do NOT Pass this packet (a PES Header) on to the MPEG2 codec */
449 find_es_header( ty_VideoPacket, p_block_in->p_buffer,
450 l_rec_size, &esOffset1 );
451 if ( esOffset1 != -1 )
453 /* msg_Dbg(p_demux, "Video PES hdr at offset %d", esOffset1); */
454 p_sys->lastVideoPTS = get_pts( &p_block_in->p_buffer[ esOffset1 + 9 ] );
455 /*msg_Dbg(p_demux, "Video rec %d PTS "I64Fd, p_sys->i_cur_rec,
456 p_sys->lastVideoPTS );*/
458 block_Release(p_block_in);
463 msg_Dbg(p_demux, "packet buffer has "
464 "%02x %02x %02x %02x %02x %02x %02x %02x "
465 "%02x %02x %02x %02x %02x %02x %02x %02x",
466 p_block_in->p_buffer[0], p_block_in->p_buffer[1],
467 p_block_in->p_buffer[2], p_block_in->p_buffer[3],
468 p_block_in->p_buffer[4], p_block_in->p_buffer[5],
469 p_block_in->p_buffer[6], p_block_in->p_buffer[7],
470 p_block_in->p_buffer[8], p_block_in->p_buffer[9],
471 p_block_in->p_buffer[10], p_block_in->p_buffer[11],
472 p_block_in->p_buffer[12], p_block_in->p_buffer[13],
473 p_block_in->p_buffer[14], p_block_in->p_buffer[15]);
475 /* if it's not a continue blk, then set PTS */
476 if (subrec_type != 0x02)
478 /*msg_Dbg(p_demux, "Video rec %d type 0x%02X", p_sys->i_cur_rec,
480 /* if it's a GOP header, make sure it's legal
481 * (if we have enough data) */
482 /* Some ty files don't have this bit set
483 * and it causes problems */
484 if (subrec_type == 0x0c && l_rec_size >= 6)
485 p_block_in->p_buffer[5] |= 0x08;
486 /* set PTS for this block before we send */
487 if (p_sys->lastVideoPTS > 0)
489 p_block_in->i_pts = p_sys->lastVideoPTS;
490 /* PTS gets used ONCE.
491 * Any subsequent frames we get BEFORE next PES
492 * header will have their PTS computed in the codec */
493 p_sys->lastVideoPTS = 0;
496 es_out_Send(p_demux->out, p_sys->p_video, p_block_in);
498 } /* end if video rec type */
499 /* ================================================================
501 * ================================================================
502 * parse PES headers and send the rest to the codec
504 else if ( rec_type == 0xc0 )
508 printf( "Audio Packet Header " );
509 for( i = 0 ; i < 24 ; i++ )
510 printf( "%2.2x ", p_block_in->p_buffer[i] );
513 /* load a codec if we haven't yet */
514 if ( p_sys->p_audio == NULL )
516 if ( subrec_type == 0x09 )
518 /* set up for AC-3 audio */
519 msg_Dbg(p_demux, "detected AC-3 Audio" );
520 setup_audio_streams('A', p_demux);
524 /* set up for MPEG audio */
525 msg_Dbg(p_demux, "detected MPEG Audio" );
526 setup_audio_streams('M', p_demux);
530 /* SA or DTiVo Audio Data, no PES (continued block)
531 * ================================================
533 if ( subrec_type == 2 )
535 /* continue PES if previous was incomplete */
536 /* TODO: Make this work for all series & types of tivos */
537 if (p_sys->i_pes_buf_cnt > 0)
539 int i_need = SERIES1_PES_LENGTH - p_sys->i_pes_buf_cnt;
541 msg_Dbg(p_demux, "continuing PES header");
542 /* do we have enough data to complete? */
543 if (i_need < l_rec_size)
545 /* we have enough; reconstruct this p_frame with the new hdr */
546 memcpy(&p_sys->pes_buffer[p_sys->i_pes_buf_cnt],
547 p_block_in->p_buffer, i_need);
548 /* advance the block past the PES header (don't want to send it) */
549 p_block_in->p_buffer += i_need;
550 p_block_in->i_buffer -= i_need;
551 /* get the PTS out of this PES header (MPEG or AC3) */
552 if (p_sys->b_mpeg_audio)
553 find_es_header(ty_MPEGAudioPacket, p_sys->pes_buffer,
556 find_es_header(ty_AC3AudioPacket, p_sys->pes_buffer,
560 /* god help us; something's really wrong */
561 msg_Err(p_demux, "can't find audio PES header in packet");
565 p_sys->lastAudioPTS = get_pts(
566 &p_sys->pes_buffer[ esOffset1 + DTIVO_PTS_OFFSET ] );
567 p_block_in->i_pts = p_sys->lastAudioPTS;
569 p_sys->i_pes_buf_cnt = 0;
573 /* don't have complete PES hdr; save what we have and return */
574 memcpy(&p_sys->pes_buffer[p_sys->i_pes_buf_cnt],
575 p_block_in->p_buffer, l_rec_size);
576 p_sys->i_pes_buf_cnt += l_rec_size;
578 block_Release(p_block_in);
582 /* set PCR before we send */
583 /*es_out_Control( p_demux->out, ES_OUT_SET_PCR,
584 p_block_in->i_pts );*/
585 es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );
588 /* MPEG Audio with PES Header, either SA or DTiVo */
589 /* ================================================ */
590 if ( subrec_type == 0x03 )
592 find_es_header( ty_MPEGAudioPacket, p_block_in->p_buffer,
593 l_rec_size, &esOffset1 );
595 /*msg_Dbg(p_demux, "buffer has %#02x %#02x %#02x %#02x",
596 p_block_in->p_buffer[0], p_block_in->p_buffer[1],
597 p_block_in->p_buffer[2], p_block_in->p_buffer[3]);
598 msg_Dbg(p_demux, "audio ES hdr at offset %d", esOffset1);*/
600 /* SA PES Header, No Audio Data */
601 /* ================================================ */
602 if ( ( esOffset1 == 0 ) && ( l_rec_size == 16 ) )
605 p_sys->lastAudioPTS = get_pts( &p_block_in->p_buffer[
607 if (p_sys->firstAudioPTS < 0)
608 p_sys->firstAudioPTS = p_sys->lastAudioPTS;
609 block_Release(p_block_in);
610 /*msg_Dbg(p_demux, "SA Audio PTS %lld",
611 p_sys->lastAudioPTS );*/
614 /* DTiVo Audio with PES Header */
615 /* ================================================ */
619 /* Check for complete PES
620 * (TODO: handle proper size for tivo version) */
621 if (check_sync_pes(p_demux, p_block_in, esOffset1,
624 /* partial PES header found, nothing else.
627 block_Release(p_block_in);
631 msg_Dbg(p_demux, "packet buffer has "
632 "%02x %02x %02x %02x %02x %02x %02x %02x "
633 "%02x %02x %02x %02x %02x %02x %02x %02x",
634 p_block_in->p_buffer[0], p_block_in->p_buffer[1],
635 p_block_in->p_buffer[2], p_block_in->p_buffer[3],
636 p_block_in->p_buffer[4], p_block_in->p_buffer[5],
637 p_block_in->p_buffer[6], p_block_in->p_buffer[7],
638 p_block_in->p_buffer[8], p_block_in->p_buffer[9],
639 p_block_in->p_buffer[10], p_block_in->p_buffer[11],
640 p_block_in->p_buffer[12], p_block_in->p_buffer[13],
641 p_block_in->p_buffer[14], p_block_in->p_buffer[15]);
643 /* set PCR before we send */
644 if( p_block_in->i_pts > 0 )
645 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
647 es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );
649 } /* if subrec == 0x03 */
651 /* SA Audio with no PES Header */
652 /* ================================================ */
653 if ( subrec_type == 0x04 )
656 "Adding SA Audio Packet Size %ld", l_rec_size ); */
658 /* set PCR before we send */
659 if (p_sys->lastAudioPTS > 0)
661 p_block_in->i_pts = p_sys->lastAudioPTS;
662 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
665 es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );
668 /* DTiVo AC3 Audio Data with PES Header */
669 /* ================================================ */
670 if ( subrec_type == 0x09 )
672 find_es_header( ty_AC3AudioPacket, p_block_in->p_buffer,
673 l_rec_size, &esOffset1 );
675 /*msg_Dbg(p_demux, "buffer has %#02x %#02x %#02x %#02x",
676 p_block_in->p_buffer[0], p_block_in->p_buffer[1],
677 p_block_in->p_buffer[2], p_block_in->p_buffer[3]);
678 msg_Dbg(p_demux, "audio ES AC3 hdr at offset %d", esOffset1);*/
680 /* Check for complete PES */
681 if (check_sync_pes(p_demux, p_block_in, esOffset1,
684 /* partial PES header found, nothing else. we're done. */
688 /* set PCR before we send (if PTS found) */
689 if( p_block_in->i_pts > 0 )
691 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
694 es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );
696 } /* end "if audio" */
697 /* ================================================================ */
699 /* ================================================================ */
700 else if ( rec_type == 0x01 )
702 /*msg_Dbg(p_demux, "CC1 %02x %02x [%c%c]", rec_hdr->ex1,
703 rec_hdr->ex2, rec_hdr->ex1, rec_hdr->ex2 );*/
705 /* construct a 'user-data' MPEG packet */
706 lastCC[ 0x00 ] = 0x00;
707 lastCC[ 0x01 ] = 0x00;
708 lastCC[ 0x02 ] = 0x01;
709 lastCC[ 0x03 ] = 0xb2;
710 lastCC[ 0x04 ] = 'T'; /* vcdimager code says this byte should be 0x11 */
711 lastCC[ 0x05 ] = 'Y'; /* (no other notes there) */
712 lastCC[ 0x06 ] = 0x01;
713 lastCC[ 0x07 ] = rec_hdr->ex1;
714 lastCC[ 0x08 ] = rec_hdr->ex2;
715 /* not sure what to send, because VLC doesn't yet support
716 * teletext type of subtitles (only supports the full-sentence type) */
717 /*p_block_in = block_NewEmpty(); ????
718 es_out_Send( p_demux->out, p_sys->p_subt_es, p_block_in );*/
720 else if ( rec_type == 0x02 )
722 /*msg_Dbg(p_demux, "CC2 %02x %02x", rec_hdr->ex1, rec_hdr->ex2 );*/
724 /* construct a 'user-data' MPEG packet */
725 lastXDS[ 0x00 ] = 0x00;
726 lastXDS[ 0x01 ] = 0x00;
727 lastXDS[ 0x02 ] = 0x01;
728 lastXDS[ 0x03 ] = 0xb2;
729 lastXDS[ 0x04 ] = 'T'; /* vcdimager code says this byte should be 0x11 */
730 lastXDS[ 0x05 ] = 'Y'; /* (no other notes there) */
731 lastXDS[ 0x06 ] = 0x02;
732 lastXDS[ 0x07 ] = rec_hdr->ex1;
733 lastXDS[ 0x08 ] = rec_hdr->ex2;
734 /* not sure what to send, because VLC doesn't support this?? */
735 /*p_block_in = block_NewEmpty(); ????
736 es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );*/
738 /* ================================================================ */
739 /* Tivo data services (e.g. "thumbs-up to record!") useless for us */
740 /* ================================================================ */
741 else if ( rec_type == 0x03 )
744 /* ================================================================ */
745 /* Unknown, but seen regularly */
746 /* ================================================================ */
747 else if ( rec_type == 0x05 )
752 msg_Dbg(p_demux, "Invalid record type 0x%02x", rec_type );
753 if (p_block_in) block_Release(p_block_in);
761 /* seek to a position within the stream, if possible */
762 static int ty_stream_seek(demux_t *p_demux, double seek_pct)
764 demux_sys_t *p_sys = p_demux->p_sys;
765 int64_t seek_pos = p_sys->i_stream_size * seek_pct;
769 /* if we're not seekable, there's nothing to do */
770 if (!p_sys->b_seekable)
773 /* figure out which chunk we want & go there */
774 p_sys->i_chunk_count = seek_pos / CHUNK_SIZE;
776 if ( stream_Seek( p_demux->s, p_sys->i_chunk_count * CHUNK_SIZE))
778 /* can't seek stream */
782 get_chunk_header(p_demux);
784 /* seek within the chunk to get roughly to where we want */
785 p_sys->i_cur_rec = (int)
786 ((double) ((seek_pos % CHUNK_SIZE) / (double) (CHUNK_SIZE)) * p_sys->i_num_recs);
787 msg_Dbg(p_demux, "seeked to file pos " I64Fd, seek_pos);
788 msg_Dbg(p_demux, " (chunk %d, record %d)",
789 p_sys->i_chunk_count - 1, p_sys->i_cur_rec);
791 /* seek to the start of this record's data.
792 * to do that, we have to skip past all prior records */
794 for (i=0; i<p_sys->i_cur_rec; i++)
795 l_skip_amt += p_sys->rec_hdrs[i].l_rec_size;
796 stream_Seek(p_demux->s, ((p_sys->i_chunk_count-1) * CHUNK_SIZE) +
797 (p_sys->i_num_recs * 16) + l_skip_amt + 4);
799 /* to hell with syncing any audio or video, just start reading records... :) */
800 /*p_sys->lastAudioPTS = p_sys->lastVideoPTS = 0;*/
801 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
806 static int Control(demux_t *p_demux, int i_query, va_list args)
808 demux_sys_t *p_sys = p_demux->p_sys;
812 /*msg_Info(p_demux, "control cmd %d", i_query);*/
815 case DEMUX_GET_POSITION:
816 /* arg is 0.0 - 1.0 percent of overall file position */
817 if( ( i64 = p_sys->i_stream_size ) > 0 )
819 pf = (double*) va_arg( args, double* );
820 *pf = (double)stream_Tell( p_demux->s ) / (double) i64;
825 case DEMUX_SET_POSITION:
826 /* arg is 0.0 - 1.0 percent of overall file position */
827 f = (double) va_arg( args, double );
828 //msg_Dbg(p_demux, "Control - set position to %2.3f", f);
829 if ((i64 = p_sys->i_stream_size) > 0)
830 return ty_stream_seek(p_demux, f);
833 /* return latest PTS - start PTS */
834 p_i64 = (int64_t *) va_arg(args, int64_t *);
835 *p_i64 = p_sys->lastAudioPTS - p_sys->firstAudioPTS;
837 case DEMUX_SET_TIME: /* arg is time in microsecs */
838 case DEMUX_GET_LENGTH: /* length of program in microseconds, 0 if unk */
846 /* =========================================================================== */
847 static void TyClose( vlc_object_t *p_this )
849 demux_sys_t *p_sys = ((demux_t *) p_this)->p_sys;
851 free(p_sys->rec_hdrs);
856 /* =========================================================================== */
857 static int get_chunk_header(demux_t *p_demux)
859 int i_readSize, i_num_recs, i;
860 uint8_t packet_header[4];
861 uint8_t record_header[16];
862 ty_rec_hdr_t *p_rec_hdr;
863 demux_sys_t *p_sys = p_demux->p_sys;
864 int i_payload_size = 0; /* sum of all records */
866 msg_Dbg(p_demux, "parsing ty chunk #%d", p_sys->i_chunk_count );
868 /* if we have left-over filler space from the last chunk, get that */
869 if (p_sys->i_stuff_cnt > 0)
870 stream_Read( p_demux->s, NULL, p_sys->i_stuff_cnt);
872 /* read the TY packet header */
873 i_readSize = stream_Read( p_demux->s, packet_header, 4 );
874 p_sys->i_chunk_count++;
876 if ( i_readSize < 4 )
883 /* if it's a PART Header, then try again. */
884 if( U32_AT( &packet_header[ 0 ] ) == TIVO_PES_FILEID )
886 msg_Dbg( p_demux, "skipping TY PART Header" );
887 /* TODO: if stream is seekable, should we seek() instead of read() ?? */
888 stream_Read( p_demux->s, NULL, CHUNK_SIZE - 4 );
889 return get_chunk_header(p_demux);
892 /* number of records in chunk (8- or 16-bit number) */
893 if (packet_header[3] & 0x80)
896 p_sys->i_num_recs = i_num_recs = (packet_header[1] << 8) + packet_header[0];
897 p_sys->i_seq_rec = (packet_header[3] << 8) + packet_header[2];
898 if (p_sys->i_seq_rec != 0xffff)
900 p_sys->i_seq_rec &= ~0x8000;
905 /* 8 bit reclen - tivo 1.3 format */
906 p_sys->i_num_recs = i_num_recs = packet_header[0];
907 p_sys->i_seq_rec = packet_header[1];
909 p_sys->i_cur_rec = 0;
910 p_sys->b_first_chunk = VLC_FALSE;
912 /*msg_Dbg( p_demux, "chunk has %d records", i_num_recs );*/
914 /* parse headers into array */
916 free(p_sys->rec_hdrs);
917 p_sys->rec_hdrs = malloc(i_num_recs * sizeof(ty_rec_hdr_t));
918 for (i = 0; i < i_num_recs; i++)
920 i_readSize = stream_Read( p_demux->s, record_header, 16 );
924 p_sys->eof = VLC_TRUE;
927 p_rec_hdr = &p_sys->rec_hdrs[i]; /* for brevity */
928 p_rec_hdr->rec_type = record_header[3];
929 p_rec_hdr->subrec_type = record_header[2] & 0x0f;
930 if ((record_header[ 0 ] & 0x80) == 0x80)
932 unsigned char b1, b2;
933 /* marker bit 2 set, so read extended data */
934 b1 = ( ( ( record_header[ 0 ] & 0x0f ) << 4 ) |
935 ( ( record_header[ 1 ] & 0xf0 ) >> 4 ) );
937 b2 = ( ( ( record_header[ 1 ] & 0x0f ) << 4 ) |
938 ( ( record_header[ 2 ] & 0xf0 ) >> 4 ) );
943 p_rec_hdr->l_rec_size = 0;
944 p_rec_hdr->b_ext = VLC_TRUE;
948 p_rec_hdr->l_rec_size = ( record_header[ 0 ] << 8 |
949 record_header[ 1 ] ) << 4 | ( record_header[ 2 ] >> 4 );
950 i_payload_size += p_rec_hdr->l_rec_size;
951 p_rec_hdr->b_ext = VLC_FALSE;
953 } /* end of record-header loop */
954 p_sys->i_stuff_cnt = CHUNK_SIZE - 4 -
955 (p_sys->i_num_recs * 16) - i_payload_size;
956 if (p_sys->i_stuff_cnt > 0)
957 msg_Dbg( p_demux, "chunk has %d stuff bytes at end",
958 p_sys->i_stuff_cnt );