Skip to content

V
vlc
Commit 1e9df876 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont
Browse files
Options

Tivo file demuxer 

based on patch from Neal Symms <nsymms # redwar.us>
with minor cleanups
parent 5f549ab8
Hide whitespace changes
Inline Side-by-side
Showing with 959 additions and 1 deletion
configure.ac
View file @ 1e9df876
...@@ -983,7 +983,7 @@ VLC_ADD_PLUGINS([trivial_resampler ugly_resampler]) ...@@ -983,7 +983,7 @@ VLC_ADD_PLUGINS([trivial_resampler ugly_resampler])
VLC_ADD_PLUGINS([trivial_channel_mixer trivial_mixer]) VLC_ADD_PLUGINS([trivial_channel_mixer trivial_mixer])
VLC_ADD_PLUGINS([id3 playlist export sgimb m3u xtag]) VLC_ADD_PLUGINS([id3 playlist export sgimb m3u xtag])
VLC_ADD_PLUGINS([i420_rgb rawvideo blend scale image logo]) VLC_ADD_PLUGINS([i420_rgb rawvideo blend scale image logo])
VLC_ADD_PLUGINS([wav araw subtitle vobsub adpcm a52sys dtssys au voc xa]) VLC_ADD_PLUGINS([wav araw subtitle vobsub adpcm a52sys dtssys au ty voc xa])
VLC_ADD_PLUGINS([access_directory access_file access_udp access_tcp]) VLC_ADD_PLUGINS([access_directory access_file access_udp access_tcp])
VLC_ADD_PLUGINS([access_http access_mms access_ftp ipv4]) VLC_ADD_PLUGINS([access_http access_mms access_ftp ipv4])
VLC_ADD_PLUGINS([packetizer_mpegvideo packetizer_h264]) VLC_ADD_PLUGINS([packetizer_mpegvideo packetizer_h264])
......
modules/demux/Modules.am
View file @ 1e9df876
...@@ -20,6 +20,7 @@ SOURCES_aiff = aiff.c ...@@ -20,6 +20,7 @@ SOURCES_aiff = aiff.c
SOURCES_sgimb = sgimb.c SOURCES_sgimb = sgimb.c
SOURCES_mjpeg = mjpeg.c SOURCES_mjpeg = mjpeg.c
SOURCES_subtitle = subtitle.c SOURCES_subtitle = subtitle.c
SOURCES_ty = ty.c
SOURCES_vobsub = vobsub.c SOURCES_vobsub = vobsub.c
SOURCES_voc = voc.c SOURCES_voc = voc.c
SOURCES_xa = xa.c SOURCES_xa = xa.c
modules/demux/ty.c 0 → 100644
View file @ 1e9df876
/*****************************************************************************
* ty.c - TiVo ty stream video demuxer for VLC
*****************************************************************************
* Copyright (C) 2005 VideoLAN
* Copyright (C) 2005 by Neal Symms (tivo@freakinzoo.com) - 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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, 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
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>
#include <vlc/input.h>
#include "vlc_codec.h"
#define SERIES1_PES_LENGTH (11)
#define SERIES2_PES_LENGTH (16)
#define AC3_PES_LENGTH (14)
#define DTIVO_PTS_OFFSET (6)
#define SA_PTS_OFFSET (9)
#define AC3_PTS_OFFSET (9)
static const unsigned char ty_VideoPacket[] = { 0x00, 0x00, 0x01, 0xe0 };
static const unsigned char ty_MPEGAudioPacket[] = { 0x00, 0x00, 0x01, 0xc0 };
static const unsigned char ty_AC3AudioPacket[] = { 0x00, 0x00, 0x01, 0xbd };
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int get_chunk_header(demux_t *);
static void setup_audio_streams(char, demux_t *);
static mtime_t get_pts( unsigned char *buf );
static int find_es_header( unsigned const char *header,
unsigned char *buffer, int bufferSize, int *esOffset1 );
static int ty_stream_seek(demux_t *p_demux, double seek_pct);
static int TyOpen (vlc_object_t *);
static void TyClose(vlc_object_t *);
static int TyDemux(demux_t *);
static int Control(demux_t *, int, va_list);
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_shortname( _("TY") );
set_description(_("TY Stream audio/video demux"));
set_category( CAT_INPUT );
set_subcategory( SUBCAT_INPUT_DEMUX );
set_capability("demux2", 10);
set_callbacks(TyOpen, TyClose);
add_shortcut("ty");
add_shortcut("tivo");
vlc_module_end();
/* 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)
*/
#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;
unsigned char ex1, ex2;
unsigned char rec_type;
unsigned char subrec_type;
char b_ext;
} ty_rec_hdr_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 */
int i_chunk_count;
int i_stuff_cnt;
size_t i_stream_size; /* size of input stream (if known) */
vlc_bool_t b_seekable; /* is this stream seekable? */
int tivoType; /* 1 = SA, 2 = DTiVo */
vlc_bool_t b_mpeg_audio; /* true if we're using MPEG audio */
uint8_t pes_buffer[20]; /* holds incomplete pes headers */
int i_pes_buf_cnt; /* how many bytes in our buffer */
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 */
vlc_bool_t eof;
vlc_bool_t b_first_chunk;
};
/*
* TyOpen: 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 TyOpen(vlc_object_t *p_this)
{
demux_t *p_demux = (demux_t *)p_this;
demux_sys_t *p_sys;
vlc_bool_t b_seekable;
es_format_t fmt;
uint8_t *p_peek;
/* see if this stream is seekable */
stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_seekable );
/* 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 )
{
/* doesn't look like a TY file... */
char *psz_ext = strrchr(p_demux->psz_path, '.');
/* if they specified tydemux, or if the file ends in .ty we try anyway */
if (strcmp(p_demux->psz_demux, "tydemux") && strcasecmp(psz_ext, ".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" );
/* Set exported functions */
p_demux->pf_demux = TyDemux;
p_demux->pf_control = Control;
/* create our structure that will hold all data */
p_demux->p_sys = p_sys = malloc(sizeof(demux_sys_t));
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 = VLC_TRUE;
p_sys->firstAudioPTS = -1;
p_sys->i_stream_size = stream_Size(p_demux->s);
p_sys->b_mpeg_audio = VLC_FALSE;
p_sys->b_seekable = b_seekable;
/* TODO: read first chunk & parse first audio PTS, then (if seekable)
* seek to last chunk & last record; read its PTS and compute
* overall program time. Also determine Tivo type. */
/* NOTE: we wait to create the audio ES until we know what
* audio type we have. */
p_sys->p_audio = NULL;
/* register the video stream */
es_format_Init( &fmt, VIDEO_ES, VLC_FOURCC( 'm', 'p', 'g', 'v' ) );
p_sys->p_video = es_out_Add( p_demux->out, &fmt );
#if 0
/* register the CC decoder */
es_format_Init( &fmt, SPU_ES, VLC_FOURCC('s', 'u', 'b', 't'));
p_sys->p_subt_es = es_out_Add(p_demux->out, &fmt);
#endif
return VLC_SUCCESS;
}
/* set up audio codec.
* this will be called once we determine audio type */
static void setup_audio_streams(char stream_type, demux_t *p_demux)
{
demux_sys_t *p_sys = p_demux->p_sys;
es_format_t fmt;
if (stream_type == 'A') {
/* AC3 audio detected */
es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'a', '5', '2', ' ' ) );
p_sys->tivoType = 2; /* AC3 is only on dtivo */
} else {
/* assume MPEG */
es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'm', 'p', 'g', 'a' ) );
p_sys->b_mpeg_audio = VLC_TRUE;
}
/* register the chosen audio output codec */
p_sys->p_audio = es_out_Add( p_demux->out, &fmt );
}
/* =========================================================================== */
/* Compute Presentation Time Stamp (PTS)
* Assume buf points to beginning of PTS */
static mtime_t get_pts( unsigned char *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( unsigned const char *header,
unsigned char *buffer, int bufferSize, int *esOffset1 )
{
int count;
*esOffset1 = -1;
for( count = 0 ; count < bufferSize ; count++ )
{
if ( ( buffer[ count + 0 ] == header[ 0 ] ) &&
( buffer[ count + 1 ] == header[ 1 ] ) &&
( buffer[ count + 2 ] == header[ 2 ] ) &&
( buffer[ count + 3 ] == header[ 3 ] ) )
{
*esOffset1 = count;
return 1;
}
}
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: fix it so it works with S2 / SA / DTivo / HD etc... */
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;
int pts_offset;
int pes_length = p_sys->b_mpeg_audio?SERIES1_PES_LENGTH:AC3_PES_LENGTH;
if( p_sys->tivoType == 1 )
{
/* SA tivo */
pts_offset = SA_PTS_OFFSET;
}
else
{
/* DTivo */
pts_offset = p_sys->b_mpeg_audio?DTIVO_PTS_OFFSET:AC3_PTS_OFFSET;
}
if ( offset < 0 || offset + 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, 4, 0 );
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 = get_pts( &p_block->p_buffer[ offset + 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 %lld", p_sys->lastAudioPTS );*/
/* adjust audio record to remove PES header */
memmove(p_block->p_buffer + offset, p_block->p_buffer + offset + pes_length,
rec_len - pes_length);
p_block->i_buffer -= pes_length;
return 0;
}
/* =========================================================================== */
/* TyDemux: 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 :) --
*/
int TyDemux(demux_t *p_demux)
{
int invalidType = 0;
int recordsDecoded = 0;
int rec_type;
long l_rec_size;
int i_cur_rec;
int subrec_type;
ty_rec_hdr_t *rec_hdr;
block_t *p_block_in = NULL;
int esOffset1;
unsigned char lastCC[ 16 ];
unsigned char lastXDS[ 16 ];
demux_sys_t *p_sys = p_demux->p_sys;
/*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)
return 0;
/*======================================================================
* parse & send one record of the chunk
*====================================================================== */
i_cur_rec = p_sys->i_cur_rec;
recordsDecoded++;
rec_hdr = &p_sys->rec_hdrs[ i_cur_rec ];
subrec_type = rec_hdr->subrec_type;
rec_type = rec_hdr->rec_type;
l_rec_size = rec_hdr->l_rec_size;
if (!rec_hdr->b_ext)
{
/*msg_Dbg(p_demux, "Record Type 0x%x/%02x %ld bytes",
subrec_type, rec_type, l_rec_size );*/
/* some normal records are 0 length, so check for that... */
if (l_rec_size > 0)
{
/* read in this record's payload */
if( !( p_block_in = stream_Block( p_demux->s, l_rec_size ) ) )
{
/* EOF */
p_sys->eof = 1;
return 0;
}
/* set these as 'unknown' for now */
p_block_in->i_pts = p_block_in->i_dts = 0;
}
else
{
/* no data in payload; we're done */
p_sys->i_cur_rec++;
return 1;
}
}
/*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,
rec_type, rec_hdr->ex1, rec_hdr->ex2);
}*/
/*================================================================*
* Video Parsing
*================================================================*/
if ( rec_type == 0xe0 )
{
if( subrec_type == 0x06 )
{
/* get the PTS from this packet.
* Do NOT Pass this packet (a PES Header) on to the MPEG2 codec */
find_es_header( ty_VideoPacket, p_block_in->p_buffer,
l_rec_size, &esOffset1 );
if ( esOffset1 != -1 )
{
/* msg_Dbg(p_demux, "Video PES hdr at offset %d", esOffset1); */
p_sys->lastVideoPTS = get_pts( &p_block_in->p_buffer[ esOffset1 + 9 ] );
/*msg_Dbg(p_demux, "Video rec %d PTS "I64Fd, p_sys->i_cur_rec,
p_sys->lastVideoPTS );*/
}
block_Release(p_block_in);
}
else
{
#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 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;
/* set PTS for this block before we send */
if (p_sys->lastVideoPTS > 0)
{
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 = 0;
}
}
es_out_Send(p_demux->out, p_sys->p_video, p_block_in);
}
} /* end if video rec type */
/* ================================================================
* Audio Parsing
* ================================================================
* parse PES headers and send the rest to the codec
*/
else if ( rec_type == 0xc0 )
{
#if 0
int i;
printf( "Audio Packet Header " );
for( i = 0 ; i < 24 ; i++ )
printf( "%2.2x ", p_block_in->p_buffer[i] );
printf( "\n" );
#endif
/* load a codec if we haven't yet */
if ( p_sys->p_audio == NULL )
{
if ( subrec_type == 0x09 )
{
/* set up for AC-3 audio */
msg_Dbg(p_demux, "detected AC-3 Audio" );
setup_audio_streams('A', p_demux);
}
else
{
/* set up for MPEG audio */
msg_Dbg(p_demux, "detected MPEG Audio" );
setup_audio_streams('M', p_demux);
}
}
/* SA or DTiVo Audio Data, no PES (continued block)
* ================================================
*/
if ( subrec_type == 2 )
{
/* continue PES if previous was incomplete */
/* TODO: Make this work for all series & types of tivos */
if (p_sys->i_pes_buf_cnt > 0)
{
int i_need = SERIES1_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)
{
/* 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->b_mpeg_audio)
find_es_header(ty_MPEGAudioPacket, p_sys->pes_buffer,
10, &esOffset1);
else
find_es_header(ty_AC3AudioPacket, p_sys->pes_buffer,
10, &esOffset1);
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 = get_pts(
&p_sys->pes_buffer[ esOffset1 + DTIVO_PTS_OFFSET ] );
p_block_in->i_pts = p_sys->lastAudioPTS;
}
p_sys->i_pes_buf_cnt = 0;
}
else
{
/* 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;
p_sys->i_cur_rec++;
block_Release(p_block_in);
return 1;
}
}
/* set PCR before we send */
/*es_out_Control( p_demux->out, ES_OUT_SET_PCR,
p_block_in->i_pts );*/
es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );
} /* subrec == 2 */
/* MPEG Audio with PES Header, either SA or DTiVo */
/* ================================================ */
if ( subrec_type == 0x03 )
{
find_es_header( ty_MPEGAudioPacket, p_block_in->p_buffer,
l_rec_size, &esOffset1 );
/*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->tivoType = 1;
p_sys->lastAudioPTS = 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);
/*msg_Dbg(p_demux, "SA Audio PTS %lld",
p_sys->lastAudioPTS );*/
}
else
/* DTiVo Audio with PES Header */
/* ================================================ */
{
p_sys->tivoType = 2;
/* Check for complete PES
* (TODO: handle proper size for tivo version) */
if (check_sync_pes(p_demux, p_block_in, esOffset1,
l_rec_size) == -1)
{
/* partial PES header found, nothing else.
* we're done. */
p_sys->i_cur_rec++;
block_Release(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
/* set PCR before we send */
if( p_block_in->i_pts > 0 )
es_out_Control( p_demux->out, ES_OUT_SET_PCR,
p_block_in->i_pts );
es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );
} /* if DTiVo */
} /* if subrec == 0x03 */
/* SA Audio with no PES Header */
/* ================================================ */
if ( subrec_type == 0x04 )
{
/*msg_Dbg(p_demux,
"Adding SA Audio Packet Size %ld", l_rec_size ); */
/* set PCR before we send */
if (p_sys->lastAudioPTS > 0)
{
p_block_in->i_pts = p_sys->lastAudioPTS;
es_out_Control( p_demux->out, ES_OUT_SET_PCR,
p_block_in->i_pts );
}
es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );
}
/* DTiVo AC3 Audio Data with PES Header */
/* ================================================ */
if ( subrec_type == 0x09 )
{
find_es_header( ty_AC3AudioPacket, p_block_in->p_buffer,
l_rec_size, &esOffset1 );
/*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 AC3 hdr at offset %d", esOffset1);*/
/* 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. */
p_sys->i_cur_rec++;
return 1;
}
/* set PCR before we send (if PTS found) */
if( p_block_in->i_pts > 0 )
{
es_out_Control( p_demux->out, ES_OUT_SET_PCR,
p_block_in->i_pts );
}
es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );
}
} /* end "if audio" */
/* ================================================================ */
/* Closed Caption */
/* ================================================================ */
else if ( rec_type == 0x01 )
{
/*msg_Dbg(p_demux, "CC1 %02x %02x [%c%c]", rec_hdr->ex1,
rec_hdr->ex2, rec_hdr->ex1, rec_hdr->ex2 );*/
/* construct a 'user-data' MPEG packet */
lastCC[ 0x00 ] = 0x00;
lastCC[ 0x01 ] = 0x00;
lastCC[ 0x02 ] = 0x01;
lastCC[ 0x03 ] = 0xb2;
lastCC[ 0x04 ] = 'T'; /* vcdimager code says this byte should be 0x11 */
lastCC[ 0x05 ] = 'Y'; /* (no other notes there) */
lastCC[ 0x06 ] = 0x01;
lastCC[ 0x07 ] = rec_hdr->ex1;
lastCC[ 0x08 ] = rec_hdr->ex2;
/* not sure what to send, because VLC doesn't yet support
* teletext type of subtitles (only supports the full-sentence type) */
/*p_block_in = block_NewEmpty(); ????
es_out_Send( p_demux->out, p_sys->p_subt_es, p_block_in );*/
}
else if ( rec_type == 0x02 )
{
/*msg_Dbg(p_demux, "CC2 %02x %02x", rec_hdr->ex1, rec_hdr->ex2 );*/
/* construct a 'user-data' MPEG packet */
lastXDS[ 0x00 ] = 0x00;
lastXDS[ 0x01 ] = 0x00;
lastXDS[ 0x02 ] = 0x01;
lastXDS[ 0x03 ] = 0xb2;
lastXDS[ 0x04 ] = 'T'; /* vcdimager code says this byte should be 0x11 */
lastXDS[ 0x05 ] = 'Y'; /* (no other notes there) */
lastXDS[ 0x06 ] = 0x02;
lastXDS[ 0x07 ] = rec_hdr->ex1;
lastXDS[ 0x08 ] = rec_hdr->ex2;
/* not sure what to send, because VLC doesn't support this?? */
/*p_block_in = block_NewEmpty(); ????
es_out_Send( p_demux->out, p_sys->p_audio, p_block_in );*/
}
/* ================================================================ */
/* Tivo data services (e.g. "thumbs-up to record!") useless for us */
/* ================================================================ */
else if ( rec_type == 0x03 )
{
}
/* ================================================================ */
/* Unknown, but seen regularly */
/* ================================================================ */
else if ( rec_type == 0x05 )
{
}
else
{
msg_Dbg(p_demux, "Invalid record type 0x%02x", rec_type );
if (p_block_in) block_Release(p_block_in);
invalidType++;
}
p_sys->i_cur_rec++;
return 1;
}
/* seek to a position within the stream, if possible */
static int ty_stream_seek(demux_t *p_demux, double seek_pct)
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t seek_pos = p_sys->i_stream_size * seek_pct;
int i;
long l_skip_amt;
/* if we're not seekable, there's nothing to do */
if (!p_sys->b_seekable)
return VLC_EGENERIC;
/* figure out which chunk we want & go there */
p_sys->i_chunk_count = seek_pos / CHUNK_SIZE;
if ( stream_Seek( p_demux->s, p_sys->i_chunk_count * CHUNK_SIZE))
{
/* can't seek stream */
return VLC_EGENERIC;
}
/* load the chunk */
get_chunk_header(p_demux);
/* seek within the chunk to get roughly to where we want */
p_sys->i_cur_rec = (int)
((double) ((seek_pos % CHUNK_SIZE) / (double) (CHUNK_SIZE)) * p_sys->i_num_recs);
msg_Dbg(p_demux, "Seeked to file pos " I64Fd, seek_pos);
msg_Dbg(p_demux, " (chunk %d, record %d)",
p_sys->i_chunk_count - 1, p_sys->i_cur_rec);
/* seek to the start of this record's data.
* to do that, we have to skip past all prior records */
l_skip_amt = 0;
for (i=0; i<p_sys->i_cur_rec; i++)
l_skip_amt += p_sys->rec_hdrs[i].l_rec_size;
stream_Seek(p_demux->s, ((p_sys->i_chunk_count-1) * CHUNK_SIZE) +
(p_sys->i_num_recs * 16) + l_skip_amt + 4);
/* to hell with syncing any audio or video, just start reading records... :) */
/*p_sys->lastAudioPTS = p_sys->lastVideoPTS = 0;*/
es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
return VLC_SUCCESS;
}
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)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(p_demux, f);
return VLC_EGENERIC;
case DEMUX_GET_TIME:
/* return latest PTS - start PTS */
p_i64 = (int64_t *) va_arg(args, int64_t *);
*p_i64 = p_sys->lastAudioPTS - p_sys->firstAudioPTS;
return VLC_SUCCESS;
case DEMUX_SET_TIME: /* arg is time in microsecs */
case DEMUX_GET_LENGTH: /* length of program in microseconds, 0 if unk */
case DEMUX_GET_FPS:
default:
return VLC_EGENERIC;
}
}
/* =========================================================================== */
static void TyClose( vlc_object_t *p_this )
{
demux_sys_t *p_sys = ((demux_t *) p_this)->p_sys;
free(p_sys->rec_hdrs);
free(p_sys);
}
/* =========================================================================== */
static int get_chunk_header(demux_t *p_demux)
{
int i_readSize, i_num_recs, i;
uint8_t packet_header[4];
uint8_t record_header[16];
ty_rec_hdr_t *p_rec_hdr;
demux_sys_t *p_sys = p_demux->p_sys;
int i_payload_size = 0; /* sum of all records */
msg_Dbg(p_demux, "parsing ty chunk #%d", p_sys->i_chunk_count );
/* if we have left-over filler space from the last chunk, get that */
if (p_sys->i_stuff_cnt > 0)
stream_Read( p_demux->s, NULL, p_sys->i_stuff_cnt);
/* read the TY packet header */
i_readSize = stream_Read( p_demux->s, packet_header, 4 );
p_sys->i_chunk_count++;
if ( i_readSize < 4 )
{
/* EOF */
p_sys->eof = 1;
return 0;
}
/* if it's a PART Header, then try again. */
if( U32_AT( &packet_header[ 0 ] ) == TIVO_PES_FILEID )
{
msg_Dbg( p_demux, "skipping TY PART Header" );
/* TODO: if stream is seekable, should we seek() instead of read() ?? */
stream_Read( p_demux->s, NULL, CHUNK_SIZE - 4 );
return get_chunk_header(p_demux);
}
/* number of records in chunk (8- or 16-bit number) */
if (packet_header[3] & 0x80)
{
/* 16 bit rec cnt */
p_sys->i_num_recs = i_num_recs = (packet_header[1] << 8) + packet_header[0];
p_sys->i_seq_rec = (packet_header[3] << 8) + packet_header[2];
if (p_sys->i_seq_rec != 0xffff)
{
p_sys->i_seq_rec &= ~0x8000;
}
}
else
{
/* 8 bit reclen - tivo 1.3 format */
p_sys->i_num_recs = i_num_recs = packet_header[0];
p_sys->i_seq_rec = packet_header[1];
}
p_sys->i_cur_rec = 0;
p_sys->b_first_chunk = VLC_FALSE;
/*msg_Dbg( p_demux, "chunk has %d records", i_num_recs );*/
/* parse headers into array */
if (p_sys->rec_hdrs)
free(p_sys->rec_hdrs);
p_sys->rec_hdrs = malloc(i_num_recs * sizeof(ty_rec_hdr_t));
for (i = 0; i < i_num_recs; i++)
{
i_readSize = stream_Read( p_demux->s, record_header, 16 );
if (i_readSize < 16)
{
/* EOF */
p_sys->eof = VLC_TRUE;
return 0;
}
p_rec_hdr = &p_sys->rec_hdrs[i]; /* for brevity */
p_rec_hdr->rec_type = record_header[3];
p_rec_hdr->subrec_type = record_header[2] & 0x0f;
if ((record_header[ 0 ] & 0x80) == 0x80)
{
unsigned char b1, b2;
/* marker bit 2 set, so read extended data */
b1 = ( ( ( record_header[ 0 ] & 0x0f ) << 4 ) |
( ( record_header[ 1 ] & 0xf0 ) >> 4 ) );
b1 &= 0x7f;
b2 = ( ( ( record_header[ 1 ] & 0x0f ) << 4 ) |
( ( record_header[ 2 ] & 0xf0 ) >> 4 ) );
b2 &= 0x7f;
p_rec_hdr->ex1 = b1;
p_rec_hdr->ex2 = b2;
p_rec_hdr->l_rec_size = 0;
p_rec_hdr->b_ext = VLC_TRUE;
}
else
{
p_rec_hdr->l_rec_size = ( record_header[ 0 ] << 8 |
record_header[ 1 ] ) << 4 | ( record_header[ 2 ] >> 4 );
i_payload_size += p_rec_hdr->l_rec_size;
p_rec_hdr->b_ext = VLC_FALSE;
}
} /* end of record-header loop */
p_sys->i_stuff_cnt = CHUNK_SIZE - 4 -
(p_sys->i_num_recs * 16) - i_payload_size;
if (p_sys->i_stuff_cnt > 0)
msg_Dbg( p_demux, "chunk has %d stuff bytes at end",
p_sys->i_stuff_cnt );
return 1;
}
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment