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ty.c
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/*****************************************************************************
* ty.c - TiVo ty stream video demuxer for VLC
*****************************************************************************
* Copyright (C) 2005 VLC authors and VideoLAN
* Copyright (C) 2005 by Neal Symms ([email protected]) - February 2005
* based on code by Christopher Wingert for tivo-mplayer
* tivo(at)wingert.org, February 2003
*
* $Id$
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*
* CODE CHANGES:
* v1.0.0 - 24-Feb-2005 - Initial release - Series 1 support ONLY!
* v1.0.1 - 25-Feb-2005 - Added fix for bad GOP headers - Neal
* v1.0.2 - 26-Feb-2005 - No longer require "seekable" input stream - Neal
* v2.0.0 - 21-Mar-2005 - Series 2 support! No AC-3 on S2 DTivo yet.
* v2.1.0 - 22-Mar-2005 - Support for AC-3 on S2 DTivo (long ac3 packets)
* v3.0.0 - 14-Jul-2005 - Support for skipping fwd/back via VLC hotkeys
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_demux.h>
#include <vlc_codec.h>
#include <vlc_meta.h>
#include <vlc_input.h>
#include "../codec/cc.h"
#include <assert.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
vlc_module_begin ()
set_shortname( N_("TY") )
set_description(N_("TY Stream audio/video demux"))
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_DEMUX )
set_capability("demux", 6)
/* FIXME: there seems to be a segfault when using PVR access
* and TY demux has a bigger priority than PS
* Something must be wrong.
*/
set_callbacks( Open, Close )
add_shortcut("ty", "tivo")
vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Demux ( demux_t * );
static int Control( demux_t *, int, va_list );
#define SERIES1_PES_LENGTH (11) /* length of audio PES hdr on S1 */
#define SERIES2_PES_LENGTH (16) /* length of audio PES hdr on S2 */
#define AC3_PES_LENGTH (14) /* length of audio PES hdr for AC3 */
#define VIDEO_PES_LENGTH (16) /* length of video PES header */
#define DTIVO_PTS_OFFSET (6) /* offs into PES for MPEG PTS on DTivo */
#define SA_PTS_OFFSET (9) /* offset into PES for MPEG PTS on SA */
#define AC3_PTS_OFFSET (9) /* offset into PES for AC3 PTS on DTivo */
#define VIDEO_PTS_OFFSET (9) /* offset into PES for video PTS on all */
#define AC3_PKT_LENGTH (1536) /* size of TiVo AC3 pkts (w/o PES hdr) */
static const uint8_t ty_VideoPacket[] = { 0x00, 0x00, 0x01, 0xe0 };
static const uint8_t ty_MPEGAudioPacket[] = { 0x00, 0x00, 0x01, 0xc0 };
static const uint8_t ty_AC3AudioPacket[] = { 0x00, 0x00, 0x01, 0xbd };
#define CHUNK_PEEK_COUNT (3) /* number of chunks to probe */
/* packet types for reference:
2/c0: audio data continued
3/c0: audio packet header (PES header)
4/c0: audio data (S/A only?)
9/c0: audio packet header, AC-3 audio
2/e0: video data continued
6/e0: video packet header (PES header)
7/e0: video sequence header start
8/e0: video I-frame header start
a/e0: video P-frame header start
b/e0: video B-frame header start
c/e0: video GOP header start
e/01: closed-caption data
e/02: Extended data services data
e/03: ipreview data ("thumbs up to record" signal)
e/05: UK Teletext
*/
#define TIVO_PES_FILEID ( 0xf5467abd )
#define TIVO_PART_LENGTH ( 0x20000000 ) /* 536,870,912 bytes */
#define CHUNK_SIZE ( 128 * 1024 )
typedef struct
{
long l_rec_size;
uint8_t ex[2];
uint8_t rec_type;
uint8_t subrec_type;
bool b_ext;
uint64_t l_ty_pts; /* TY PTS in the record header */
} ty_rec_hdr_t;
typedef struct
{
uint64_t l_timestamp;
uint8_t chunk_bitmask[8];
} ty_seq_table_t;
typedef enum
{
TIVO_TYPE_UNKNOWN,
TIVO_TYPE_SA,
TIVO_TYPE_DTIVO
} tivo_type_t;
typedef enum
{
TIVO_SERIES_UNKNOWN,
TIVO_SERIES1,
TIVO_SERIES2
} tivo_series_t;
typedef enum
{
TIVO_AUDIO_UNKNOWN,
TIVO_AUDIO_AC3,
TIVO_AUDIO_MPEG
} tivo_audio_t;
#define XDS_MAX_DATA_SIZE (32)
typedef enum
{
XDS_CLASS_CURRENT = 0,
XDS_CLASS_FUTURE = 1,
XDS_CLASS_CHANNEL = 2,
XDS_CLASS_MISCELLANEOUS = 3,
XDS_CLASS_PUBLIC_SERVICE = 4,
XDS_CLASS_RESERVED = 5,
XDS_CLASS_UNDEFINED = 6,
XDS_CLASS_OTHER = 7,
XDS_MAX_CLASS_COUNT
} xds_class_t;
typedef struct
{
bool b_started;
int i_data;
uint8_t p_data[XDS_MAX_DATA_SIZE];
int i_sum;
} xds_packet_t;
typedef enum
{
XDS_META_PROGRAM_RATING_NONE,
XDS_META_PROGRAM_RATING_MPAA,
XDS_META_PROGRAM_RATING_TPG,
/* TODO add CA/CE rating */
} xds_meta_program_rating_t;
typedef struct
{
char *psz_name;
xds_meta_program_rating_t rating;
char *psz_rating;
/* Add the other fields once I have the samples */
} xds_meta_program_t;
typedef struct
{
char *psz_channel_name;
char *psz_channel_call_letter;
char *psz_channel_number;
xds_meta_program_t current;
xds_meta_program_t future;
} xds_meta_t;
typedef struct
{
/* Are we in XDS mode */
bool b_xds;
/* Current class type */
xds_class_t i_class;
int i_type;
bool b_future;
/* */
xds_packet_t pkt[XDS_MAX_CLASS_COUNT][128]; /* XXX it is way too much, but simpler */
/* */
bool b_meta_changed;
xds_meta_t meta;
} xds_t;
struct demux_sys_t
{
es_out_id_t *p_video; /* ptr to video codec */
es_out_id_t *p_audio; /* holds either ac3 or mpeg codec ptr */
cc_data_t cc;
es_out_id_t *p_cc[4];
xds_t xds;
int i_cur_chunk;
int i_stuff_cnt;
size_t i_stream_size; /* size of input stream (if known) */
//uint64_t l_program_len; /* length of this stream in msec */
bool b_seekable; /* is this stream seekable? */
bool b_have_master; /* are master chunks present? */
tivo_type_t tivo_type; /* tivo type (SA / DTiVo) */
tivo_series_t tivo_series; /* Series1 or Series2 */
tivo_audio_t audio_type; /* AC3 or MPEG */
int i_Pes_Length; /* Length of Audio PES header */
int i_Pts_Offset; /* offset into audio PES of PTS */
uint8_t pes_buffer[20]; /* holds incomplete pes headers */
int i_pes_buf_cnt; /* how many bytes in our buffer */
size_t l_ac3_pkt_size; /* len of ac3 pkt we've seen so far */
uint64_t l_last_ty_pts; /* last TY timestamp we've seen */
//mtime_t l_last_ty_pts_sync; /* audio PTS at time of last TY PTS */
uint64_t l_first_ty_pts; /* first TY PTS in this master chunk */
uint64_t l_final_ty_pts; /* final TY PTS in this master chunk */
unsigned i_seq_table_size; /* number of entries in SEQ table */
unsigned i_bits_per_seq_entry; /* # of bits in SEQ table bitmask */
mtime_t firstAudioPTS;
mtime_t lastAudioPTS;
mtime_t lastVideoPTS;
ty_rec_hdr_t *rec_hdrs; /* record headers array */
int i_cur_rec; /* current record in this chunk */
int i_num_recs; /* number of recs in this chunk */
int i_seq_rec; /* record number where seq start is */
ty_seq_table_t *seq_table; /* table of SEQ entries from mstr chk */
bool eof;
bool b_first_chunk;
};
static int get_chunk_header(demux_t *);
static mtime_t get_pts( const uint8_t *buf );
static int find_es_header( const uint8_t *header,
const uint8_t *buffer, int i_search_len );
static int ty_stream_seek_pct(demux_t *p_demux, double seek_pct);
static int ty_stream_seek_time(demux_t *, uint64_t);
static ty_rec_hdr_t *parse_chunk_headers( const uint8_t *p_buf,
int i_num_recs, int *pi_payload_size);
static int probe_stream(demux_t *p_demux);
static void analyze_chunk(demux_t *p_demux, const uint8_t *p_chunk);
static void parse_master(demux_t *p_demux);
static int DemuxRecVideo( demux_t *p_demux, ty_rec_hdr_t *rec_hdr, block_t *p_block_in );
static int DemuxRecAudio( demux_t *p_demux, ty_rec_hdr_t *rec_hdr, block_t *p_block_in );
static int DemuxRecCc( demux_t *p_demux, ty_rec_hdr_t *rec_hdr, block_t *p_block_in );
static void DemuxDecodeXds( demux_t *p_demux, uint8_t d1, uint8_t d2 );
static void XdsInit( xds_t * );
static void XdsExit( xds_t * );
#define TY_ES_GROUP (1)
/*
* Open: check file and initialize demux structures
*
* here's what we do:
* 1. peek at the first 12 bytes of the stream for the
* magic TiVo PART header & stream type & chunk size
* 2. if it's not there, error with VLC_EGENERIC
* 3. set up video (mpgv) codec
* 4. return VLC_SUCCESS
*/
static int Open(vlc_object_t *p_this)
{
demux_t *p_demux = (demux_t *)p_this;
demux_sys_t *p_sys;
es_format_t fmt;
const uint8_t *p_peek;
int i;
/* peek at the first 12 bytes. */
/* for TY streams, they're always the same */
if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 )
return VLC_EGENERIC;
if ( U32_AT(p_peek) != TIVO_PES_FILEID ||
U32_AT(&p_peek[4]) != 0x02 ||
U32_AT(&p_peek[8]) != CHUNK_SIZE )
{
if( !p_demux->b_force &&
!demux_IsPathExtension( p_demux, ".ty" ) &&
!demux_IsPathExtension( p_demux, ".ty+" ) )
return VLC_EGENERIC;
msg_Warn( p_demux, "this does not look like a TY file, "
"continuing anyway..." );
}
/* at this point, we assume we have a valid TY stream */
msg_Dbg( p_demux, "valid TY stream detected" );
p_sys = malloc(sizeof(demux_sys_t));
if( unlikely(p_sys == NULL) )
return VLC_ENOMEM;
/* Set exported functions */
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
/* create our structure that will hold all data */
p_demux->p_sys = p_sys;
memset(p_sys, 0, sizeof(demux_sys_t));
/* set up our struct (most were zero'd out with the memset above) */
p_sys->b_first_chunk = true;
p_sys->b_have_master = (U32_AT(p_peek) == TIVO_PES_FILEID);
p_sys->firstAudioPTS = -1;
p_sys->lastAudioPTS = VLC_TS_INVALID;
p_sys->lastVideoPTS = VLC_TS_INVALID;
p_sys->i_stream_size = stream_Size(p_demux->s);
p_sys->tivo_type = TIVO_TYPE_UNKNOWN;
p_sys->audio_type = TIVO_AUDIO_UNKNOWN;
p_sys->tivo_series = TIVO_SERIES_UNKNOWN;
p_sys->i_Pes_Length = 0;
p_sys->i_Pts_Offset = 0;
p_sys->l_ac3_pkt_size = 0;
/* see if this stream is seekable */
stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable );
if (probe_stream(p_demux) != VLC_SUCCESS) {
//TyClose(p_demux);
return VLC_EGENERIC;
}
if (!p_sys->b_have_master)
msg_Warn(p_demux, "No master chunk found; seeking will be limited.");
/* register the proper audio codec */
if (p_sys->audio_type == TIVO_AUDIO_MPEG) {
es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_MPGA );
} else {
es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_A52 );
}
fmt.i_group = TY_ES_GROUP;
p_sys->p_audio = es_out_Add( p_demux->out, &fmt );
/* register the video stream */
es_format_Init( &fmt, VIDEO_ES, VLC_CODEC_MPGV );
fmt.i_group = TY_ES_GROUP;
p_sys->p_video = es_out_Add( p_demux->out, &fmt );
/* */
for( i = 0; i < 4; i++ )
p_sys->p_cc[i] = NULL;
cc_Init( &p_sys->cc );
XdsInit( &p_sys->xds );
return VLC_SUCCESS;
}
/* =========================================================================== */
/* Demux: Read & Demux one record from the chunk
*
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*
* NOTE: I think we can return the number of packets sent instead of just 1.
* that means we can demux an entire chunk and shoot it back (may be more efficient)
* -- should try that some day :) --
*/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
ty_rec_hdr_t *p_rec;
block_t *p_block_in = NULL;
/*msg_Dbg(p_demux, "ty demux processing" );*/
/* did we hit EOF earlier? */
if( p_sys->eof )
return 0;
/*
* what we do (1 record now.. maybe more later):
* - use stream_Read() to read the chunk header & record headers
* - discard entire chunk if it is a PART header chunk
* - parse all the headers into record header array
* - keep a pointer of which record we're on
* - use stream_Block() to fetch each record
* - parse out PTS from PES headers
* - set PTS for data packets
* - pass the data on to the proper codec via es_out_Send()
* if this is the first time or
* if we're at the end of this chunk, start a new one
*/
/* parse the next chunk's record headers */
if( p_sys->b_first_chunk || p_sys->i_cur_rec >= p_sys->i_num_recs )
{
if( get_chunk_header(p_demux) == 0 || p_sys->i_num_recs == 0 )
return 0;
}
/*======================================================================
* parse & send one record of the chunk
*====================================================================== */
p_rec = &p_sys->rec_hdrs[p_sys->i_cur_rec];
if( !p_rec->b_ext )
{
const long l_rec_size = p_rec->l_rec_size;
/*msg_Dbg(p_demux, "Record Type 0x%x/%02x %ld bytes",
subrec_type, p_rec->rec_type, l_rec_size );*/
/* some normal records are 0 length, so check for that... */
if( l_rec_size <= 0 )
{
/* no data in payload; we're done */
p_sys->i_cur_rec++;
return 1;
}
/* read in this record's payload */
if( !( p_block_in = stream_Block( p_demux->s, l_rec_size ) ) )
return 0;
/* set these as 'unknown' for now */
p_block_in->i_pts =
p_block_in->i_dts = VLC_TS_INVALID;
}
/*else
{
-- don't read any data from the stream, data was in the record header --
msg_Dbg(p_demux,
"Record Type 0x%02x/%02x, ext data = %02x, %02x", subrec_type,
p_rec->rec_type, p_rec->ex1, p_rec->ex2);
}*/
if( p_rec->rec_type == 0xe0 )
{
/* Video */
DemuxRecVideo( p_demux, p_rec, p_block_in );
}
else if ( p_rec->rec_type == 0xc0 )
{
/* Audio */
DemuxRecAudio( p_demux, p_rec, p_block_in );
}
else if( p_rec->rec_type == 0x01 || p_rec->rec_type == 0x02 )
{
/* Closed Captions/XDS */
DemuxRecCc( p_demux, p_rec, p_block_in );
}
else if ( p_rec->rec_type == 0x03 )
{
/* Tivo data services (e.g. "thumbs-up to record!") useless for us */
if( p_block_in )
block_Release(p_block_in);
}
else if ( p_rec->rec_type == 0x05 )
{
/* Unknown, but seen regularly */
if( p_block_in )
block_Release(p_block_in);
}
else
{
msg_Dbg(p_demux, "Invalid record type 0x%02x", p_rec->rec_type );
if( p_block_in )
block_Release(p_block_in);
}
/* */
p_sys->i_cur_rec++;
return 1;
}
/* Control */
static int Control(demux_t *p_demux, int i_query, va_list args)
{
demux_sys_t *p_sys = p_demux->p_sys;
double f, *pf;
int64_t i64, *p_i64;
/*msg_Info(p_demux, "control cmd %d", i_query);*/
switch( i_query )
{
case DEMUX_GET_POSITION:
/* arg is 0.0 - 1.0 percent of overall file position */
if( ( i64 = p_sys->i_stream_size ) > 0 )
{
pf = (double*) va_arg( args, double* );
*pf = ((double)1.0) * stream_Tell( p_demux->s ) / (double) i64;
return VLC_SUCCESS;
}
return VLC_EGENERIC;
case DEMUX_SET_POSITION:
/* arg is 0.0 - 1.0 percent of overall file position */
f = (double) va_arg( args, double );
/* msg_Dbg(p_demux, "Control - set position to %2.3f", f); */
if ((i64 = p_sys->i_stream_size) > 0)
return ty_stream_seek_pct(p_demux, f);
return VLC_EGENERIC;
case DEMUX_GET_TIME:
/* return TiVo timestamp */
p_i64 = (int64_t *) va_arg(args, int64_t *);
//*p_i64 = p_sys->lastAudioPTS - p_sys->firstAudioPTS;
//*p_i64 = (p_sys->l_last_ty_pts / 1000) + (p_sys->lastAudioPTS -
// p_sys->l_last_ty_pts_sync);
*p_i64 = (p_sys->l_last_ty_pts / 1000);
return VLC_SUCCESS;
case DEMUX_GET_LENGTH: /* length of program in microseconds, 0 if unk */
/* size / bitrate */
p_i64 = (int64_t *) va_arg(args, int64_t *);
*p_i64 = 0;
return VLC_SUCCESS;
case DEMUX_SET_TIME: /* arg is time in microsecs */
i64 = (int64_t) va_arg( args, int64_t );
return ty_stream_seek_time(p_demux, i64 * 1000);
case DEMUX_GET_FPS:
default:
return VLC_EGENERIC;
}
}
/* Close */
static void Close( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
XdsExit( &p_sys->xds );
cc_Exit( &p_sys->cc );
free( p_sys->rec_hdrs );
free( p_sys->seq_table );
free(p_sys);
}
/* =========================================================================== */
/* Compute Presentation Time Stamp (PTS)
* Assume buf points to beginning of PTS */
static mtime_t get_pts( const uint8_t *buf )
{
mtime_t i_pts;
i_pts = ((mtime_t)(buf[0]&0x0e ) << 29)|
(mtime_t)(buf[1] << 22)|
((mtime_t)(buf[2]&0xfe) << 14)|
(mtime_t)(buf[3] << 7)|
(mtime_t)(buf[4] >> 1);
i_pts *= 100 / 9; /* convert PTS (90Khz clock) to microseconds */
return i_pts;
}
/* =========================================================================== */
static int find_es_header( const uint8_t *header,
const uint8_t *buffer, int i_search_len )
{
int count;
for( count = 0; count < i_search_len; count++ )
{
if( !memcmp( &buffer[count], header, 4 ) )
return count;
}
return -1;
}
/* =========================================================================== */
/* check if we have a full PES header, if not, then save what we have.
* this is called when audio-start packets are encountered.
* Returns:
* 1 partial PES hdr found, some audio data found (buffer adjusted),
* -1 partial PES hdr found, no audio data found
* 0 otherwise (complete PES found, pts extracted, pts set, buffer adjusted) */
/* TODO: HD support -- nothing known about those streams */
static int check_sync_pes( demux_t *p_demux, block_t *p_block,
int32_t offset, int32_t rec_len )
{
demux_sys_t *p_sys = p_demux->p_sys;
if ( offset < 0 || offset + p_sys->i_Pes_Length > rec_len )
{
/* entire PES header not present */
msg_Dbg( p_demux, "PES header at %d not complete in record. storing.",
offset );
/* save the partial pes header */
if( offset < 0 )
{
/* no header found, fake some 00's (this works, believe me) */
memset( p_sys->pes_buffer, 0, 4 );
p_sys->i_pes_buf_cnt = 4;
if( rec_len > 4 )
msg_Err( p_demux, "PES header not found in record of %d bytes!",
rec_len );
return -1;
}
/* copy the partial pes header we found */
memcpy( p_sys->pes_buffer, p_block->p_buffer + offset,
rec_len - offset );
p_sys->i_pes_buf_cnt = rec_len - offset;
if( offset > 0 )
{
/* PES Header was found, but not complete, so trim the end of this record */
p_block->i_buffer -= rec_len - offset;
return 1;
}
return -1; /* partial PES, no audio data */
}
/* full PES header present, extract PTS */
p_sys->lastAudioPTS = VLC_TS_0 + get_pts( &p_block->p_buffer[ offset +
p_sys->i_Pts_Offset ] );
if (p_sys->firstAudioPTS < 0)
p_sys->firstAudioPTS = p_sys->lastAudioPTS;
p_block->i_pts = p_sys->lastAudioPTS;
/*msg_Dbg(p_demux, "Audio PTS %"PRId64, p_sys->lastAudioPTS );*/
/* adjust audio record to remove PES header */
memmove(p_block->p_buffer + offset, p_block->p_buffer + offset +
p_sys->i_Pes_Length, rec_len - p_sys->i_Pes_Length);
p_block->i_buffer -= p_sys->i_Pes_Length;
#if 0
msg_Dbg(p_demux, "pes hdr removed; buffer len=%d and has "
"%02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x", p_block->i_buffer,
p_block->p_buffer[0], p_block->p_buffer[1],
p_block->p_buffer[2], p_block->p_buffer[3],
p_block->p_buffer[4], p_block->p_buffer[5],
p_block->p_buffer[6], p_block->p_buffer[7],
p_block->p_buffer[8], p_block->p_buffer[9],
p_block->p_buffer[10], p_block->p_buffer[11],
p_block->p_buffer[12], p_block->p_buffer[13],
p_block->p_buffer[14], p_block->p_buffer[15]);
#endif
return 0;
}
static int DemuxRecVideo( demux_t *p_demux, ty_rec_hdr_t *rec_hdr, block_t *p_block_in )
{
demux_sys_t *p_sys = p_demux->p_sys;
const int subrec_type = rec_hdr->subrec_type;
const long l_rec_size = rec_hdr->l_rec_size; // p_block_in->i_buffer might be better
int esOffset1;
int i;
assert( rec_hdr->rec_type == 0xe0 );
if( !p_block_in )
return -1;
#if 0
msg_Dbg(p_demux, "packet buffer has "
"%02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x",
p_block_in->p_buffer[0], p_block_in->p_buffer[1],
p_block_in->p_buffer[2], p_block_in->p_buffer[3],
p_block_in->p_buffer[4], p_block_in->p_buffer[5],
p_block_in->p_buffer[6], p_block_in->p_buffer[7],
p_block_in->p_buffer[8], p_block_in->p_buffer[9],
p_block_in->p_buffer[10], p_block_in->p_buffer[11],
p_block_in->p_buffer[12], p_block_in->p_buffer[13],
p_block_in->p_buffer[14], p_block_in->p_buffer[15]);
#endif
//if( subrec_type == 0x06 || subrec_type == 0x07 )
if( subrec_type != 0x02 && subrec_type != 0x0c &&
subrec_type != 0x08 && l_rec_size > 4 )
{
/* get the PTS from this packet if it has one.
* on S1, only 0x06 has PES. On S2, however, most all do.
* Do NOT Pass the PES Header to the MPEG2 codec */
esOffset1 = find_es_header( ty_VideoPacket, p_block_in->p_buffer, 5 );
if( esOffset1 != -1 )
{
//msg_Dbg(p_demux, "Video PES hdr in pkt type 0x%02x at offset %d",
//subrec_type, esOffset1);
p_sys->lastVideoPTS = VLC_TS_0 + get_pts(
&p_block_in->p_buffer[ esOffset1 + VIDEO_PTS_OFFSET ] );
/*msg_Dbg(p_demux, "Video rec %d PTS %"PRId64, p_sys->i_cur_rec,
p_sys->lastVideoPTS );*/
if (subrec_type != 0x06) {
/* if we found a PES, and it's not type 6, then we're S2 */
/* The packet will have video data (& other headers) so we
* chop out the PES header and send the rest */
if (l_rec_size >= VIDEO_PES_LENGTH) {
p_block_in->p_buffer += VIDEO_PES_LENGTH + esOffset1;
p_block_in->i_buffer -= VIDEO_PES_LENGTH + esOffset1;
} else {
msg_Dbg(p_demux, "video rec type 0x%02x has short PES"
" (%ld bytes)", subrec_type, l_rec_size);
/* nuke this block; it's too short, but has PES marker */
p_block_in->i_buffer = 0;
}
}
}/* else
msg_Dbg(p_demux, "No Video PES hdr in pkt type 0x%02x",
subrec_type); */
}
if(subrec_type == 0x06 )
{
/* type 6 (S1 DTivo) has no data, so we're done */
block_Release(p_block_in);
return 0;
}
/* if it's not a continue blk, then set PTS */
if( subrec_type != 0x02 )
{
/*msg_Dbg(p_demux, "Video rec %d type 0x%02X", p_sys->i_cur_rec,
subrec_type);*/
/* if it's a GOP header, make sure it's legal
* (if we have enough data) */
/* Some ty files don't have this bit set
* and it causes problems */
if (subrec_type == 0x0c && l_rec_size >= 6)
p_block_in->p_buffer[5] |= 0x08;
/* store the TY PTS if there is one */
if (subrec_type == 0x07) {
p_sys->l_last_ty_pts = rec_hdr->l_ty_pts;
/* should we use audio or video PTS? */
//p_sys->l_last_ty_pts_sync = p_sys->lastAudioPTS;
} else {
/* yes I know this is a cheap hack. It's the timestamp
used for display and skipping fwd/back, so it
doesn't have to be accurate to the millisecond.
I adjust it here by roughly one 1/30 sec. Yes it
will be slightly off for UK streams, but it's OK.
*/
p_sys->l_last_ty_pts += 35000000;
//p_sys->l_last_ty_pts += 33366667;
}
/* set PTS for this block before we send */
if (p_sys->lastVideoPTS > VLC_TS_INVALID)
{
p_block_in->i_pts = p_sys->lastVideoPTS;
/* PTS gets used ONCE.
* Any subsequent frames we get BEFORE next PES
* header will have their PTS computed in the codec */
p_sys->lastVideoPTS = VLC_TS_INVALID;
}
}
/* Register the CC decoders when needed */
for( i = 0; i < 4; i++ )
{
static const vlc_fourcc_t fcc[4] = {
VLC_FOURCC('c', 'c', '1', ' '),
VLC_FOURCC('c', 'c', '2', ' '),
VLC_FOURCC('c', 'c', '3', ' '),
VLC_FOURCC('c', 'c', '4', ' ')
};
static const char *ppsz_description[4] = {
N_("Closed captions 1"),
N_("Closed captions 2"),
N_("Closed captions 3"),
N_("Closed captions 4"),
};
es_format_t fmt;
if( !p_sys->cc.pb_present[i] || p_sys->p_cc[i] )
continue;
es_format_Init( &fmt, SPU_ES, fcc[i] );
fmt.psz_description = strdup( vlc_gettext(ppsz_description[i]) );
fmt.i_group = TY_ES_GROUP;
p_sys->p_cc[i] = es_out_Add( p_demux->out, &fmt );
es_format_Clean( &fmt );
}
/* Send the CC data */
if( p_block_in->i_pts > VLC_TS_INVALID && p_sys->cc.i_data > 0 )
{
for( i = 0; i < 4; i++ )
{
if( p_sys->p_cc[i] )
{
block_t *p_cc = block_Alloc( p_sys->cc.i_data );
p_cc->i_flags |= BLOCK_FLAG_TYPE_I;
p_cc->i_pts = p_block_in->i_pts;
memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
es_out_Send( p_demux->out, p_sys->p_cc[i], p_cc );
}
}
cc_Flush( &p_sys->cc );
}
//msg_Dbg(p_demux, "sending rec %d as video type 0x%02x",
//p_sys->i_cur_rec, subrec_type);
es_out_Send(p_demux->out, p_sys->p_video, p_block_in);
return 0;
}
static int DemuxRecAudio( demux_t *p_demux, ty_rec_hdr_t *rec_hdr, block_t *p_block_in )
{
demux_sys_t *p_sys = p_demux->p_sys;
const int subrec_type = rec_hdr->subrec_type;
const long l_rec_size = rec_hdr->l_rec_size;
int esOffset1;
assert( rec_hdr->rec_type == 0xc0 );
if( !p_block_in )
return -1;
#if 0
int i;
fprintf( stderr, "Audio Packet Header " );
for( i = 0 ; i < 24 ; i++ )
fprintf( stderr, "%2.2x ", p_block_in->p_buffer[i] );
fprintf( stderr, "\n" );
#endif
if( subrec_type == 2 )
{
/* SA or DTiVo Audio Data, no PES (continued block)
* ================================================
*/
/* continue PES if previous was incomplete */
if (p_sys->i_pes_buf_cnt > 0)
{
const int i_need = p_sys->i_Pes_Length - p_sys->i_pes_buf_cnt;
msg_Dbg(p_demux, "continuing PES header");
/* do we have enough data to complete? */
if (i_need >= l_rec_size)
{
/* don't have complete PES hdr; save what we have and return */
memcpy(&p_sys->pes_buffer[p_sys->i_pes_buf_cnt],
p_block_in->p_buffer, l_rec_size);
p_sys->i_pes_buf_cnt += l_rec_size;
/* */
block_Release(p_block_in);
return 0;
}
/* we have enough; reconstruct this p_frame with the new hdr */
memcpy(&p_sys->pes_buffer[p_sys->i_pes_buf_cnt],
p_block_in->p_buffer, i_need);
/* advance the block past the PES header (don't want to send it) */
p_block_in->p_buffer += i_need;
p_block_in->i_buffer -= i_need;
/* get the PTS out of this PES header (MPEG or AC3) */
if (p_sys->audio_type == TIVO_AUDIO_MPEG)
esOffset1 = find_es_header(ty_MPEGAudioPacket,
p_sys->pes_buffer, 5);
else
esOffset1 = find_es_header(ty_AC3AudioPacket,
p_sys->pes_buffer, 5);
if (esOffset1 < 0)
{
/* god help us; something's really wrong */
msg_Err(p_demux, "can't find audio PES header in packet");
}
else
{
p_sys->lastAudioPTS = VLC_TS_0 + get_pts(
&p_sys->pes_buffer[ esOffset1 + p_sys->i_Pts_Offset ] );
p_block_in->i_pts = p_sys->lastAudioPTS;
}
p_sys->i_pes_buf_cnt = 0;
}
/* S2 DTivo has AC3 packets with 2 padding bytes at end. This is
* not allowed in the AC3 spec and will cause problems. So here
* we try to trim things. */
/* Also, S1 DTivo has alternating short / long AC3 packets. That
* is, one packet is short (incomplete) and the next packet has
* the first one's missing data, plus all of its own. Strange. */
if (p_sys->audio_type == TIVO_AUDIO_AC3 &&
p_sys->tivo_series == TIVO_SERIES2) {
if (p_sys->l_ac3_pkt_size + p_block_in->i_buffer >
AC3_PKT_LENGTH) {
p_block_in->i_buffer -= 2;
p_sys->l_ac3_pkt_size = 0;
} else {
p_sys->l_ac3_pkt_size += p_block_in->i_buffer;
}
}
}
else if( subrec_type == 0x03 )
{
/* MPEG Audio with PES Header, either SA or DTiVo */
/* ================================================ */
esOffset1 = find_es_header( ty_MPEGAudioPacket,
p_block_in->p_buffer, 5 );
/*msg_Dbg(p_demux, "buffer has %#02x %#02x %#02x %#02x",
p_block_in->p_buffer[0], p_block_in->p_buffer[1],
p_block_in->p_buffer[2], p_block_in->p_buffer[3]);
msg_Dbg(p_demux, "audio ES hdr at offset %d", esOffset1);*/
/* SA PES Header, No Audio Data */
/* ================================================ */
if ( ( esOffset1 == 0 ) && ( l_rec_size == 16 ) )
{
p_sys->lastAudioPTS = VLC_TS_0 + get_pts( &p_block_in->p_buffer[
SA_PTS_OFFSET ] );
if (p_sys->firstAudioPTS < 0)
p_sys->firstAudioPTS = p_sys->lastAudioPTS;
block_Release(p_block_in);
return 0;
/*msg_Dbg(p_demux, "SA Audio PTS %"PRId64, p_sys->lastAudioPTS );*/
}
/* DTiVo Audio with PES Header */
/* ================================================ */
/* Check for complete PES */
if (check_sync_pes(p_demux, p_block_in, esOffset1,
l_rec_size) == -1)
{
/* partial PES header found, nothing else.
* we're done. */
block_Release(p_block_in);
return 0;
}
#if 0
msg_Dbg(p_demux, "packet buffer has "
"%02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x",
p_block_in->p_buffer[0], p_block_in->p_buffer[1],
p_block_in->p_buffer[2], p_block_in->p_buffer[3],
p_block_in->p_buffer[4], p_block_in->p_buffer[5],
p_block_in->p_buffer[6], p_block_in->p_buffer[7],
p_block_in->p_buffer[8], p_block_in->p_buffer[9],
p_block_in->p_buffer[10], p_block_in->p_buffer[11],
p_block_in->p_buffer[12], p_block_in->p_buffer[13],
p_block_in->p_buffer[14], p_block_in->p_buffer[15]);
#endif
}
else if( subrec_type == 0x04 )
{
/* SA Audio with no PES Header */
/* ================================================ */
/*msg_Dbg(p_demux,
"Adding SA Audio Packet Size %ld", l_rec_size ); */
if (p_sys->lastAudioPTS > VLC_TS_INVALID )
p_block_in->i_pts = p_sys->lastAudioPTS;
}
else if( subrec_type == 0x09 )
{
/* DTiVo AC3 Audio Data with PES Header */
/* ================================================ */
esOffset1 = find_es_header( ty_AC3AudioPacket,
p_block_in->p_buffer, 5 );
#if 0
msg_Dbg(p_demux, "buffer has "
"%02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x",
p_block_in->p_buffer[0], p_block_in->p_buffer[1],
p_block_in->p_buffer[2], p_block_in->p_buffer[3],
p_block_in->p_buffer[4], p_block_in->p_buffer[5],
p_block_in->p_buffer[6], p_block_in->p_buffer[7],
p_block_in->p_buffer[8], p_block_in->p_buffer[9],
p_block_in->p_buffer[10], p_block_in->p_buffer[11],
p_block_in->p_buffer[12], p_block_in->p_buffer[13],
p_block_in->p_buffer[14], p_block_in->p_buffer[15]);
msg_Dbg(p_demux, "audio ES AC3 hdr at offset %d", esOffset1);
#endif
/* Check for complete PES */
if (check_sync_pes(p_demux, p_block_in, esOffset1,
l_rec_size) == -1)
{
/* partial PES header found, nothing else. we're done. */
block_Release(p_block_in);
return 0;
}
/* S2 DTivo has invalid long AC3 packets */
if (p_sys->tivo_series == TIVO_SERIES2) {
if (p_block_in->i_buffer > AC3_PKT_LENGTH) {
p_block_in->i_buffer -= 2;
p_sys->l_ac3_pkt_size = 0;
} else {
p_sys->l_ac3_pkt_size = p_block_in->i_buffer;
}