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mpv/libmpdemux/demux_ty.c

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/*
* tivo@wingert.org, February 2003
*
* Copyright (C) 2003 Christopher R. Wingert
*
* The license covers the portions of this file regarding TiVo additions.
*
* Olaf Beck and Tridge (indirectly) were essential at providing
* information regarding the format of the TiVo streams.
*
* However, no code in the following subsection is directly copied from
* either author.
*
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <stdarg.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "stream/stream.h"
#include "demuxer.h"
#include "parse_es.h"
#include "stheader.h"
#include "sub_cc.h"
extern void skip_audio_frame( sh_audio_t *sh_audio );
extern int sub_justify;
// 2/c0: audio data
// 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
// 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
#define TIVO_PES_FILEID ( 0xf5467abd )
#define TIVO_PART_LENGTH ( 0x20000000 )
#define CHUNKSIZE ( 128 * 1024 )
#define MAX_AUDIO_BUFFER ( 16 * 1024 )
#define PTS_MHZ ( 90 )
#define PTS_KHZ ( PTS_MHZ * 1000 )
#define TY_V ( 1 )
#define TY_A ( 2 )
typedef struct stmf_fileParts
{
int fileNo;
off_t fileSize;
int chunks;
off_t startOffset;
} tmf_fileParts;
#define MAX_TMF_PARTS ( 16 )
typedef struct sTivoInfo
{
int whichChunk;
unsigned char lastAudio[ MAX_AUDIO_BUFFER ];
int lastAudioEnd;
int tivoType; // 1 = SA, 2 = DTiVo
float firstAudioPTS;
float firstVideoPTS;
float lastAudioPTS;
float lastVideoPTS;
int headerOk;
unsigned int pesFileId; // Should be 0xf5467abd
int streamType; // Should be 0x02
int chunkSize; // Should always be 128k
off_t size;
int readHeader;
int tmf;
tmf_fileParts tmfparts[ MAX_TMF_PARTS ];
int tmf_totalparts;
off_t tmf_totalsize;
off_t tmf_totalchunks;
} TiVoInfo;
off_t vstream_streamsize( );
void ty_ClearOSD( int start );
// ===========================================================================
#define TMF_SIG "showing.xml"
int ty_octaltodecimal( char *num )
{
int i;
int result = 0;
int len;
int mult;
len = strlen( num );
mult = 1;
for ( i = ( len - 1 ) ; i >= 0 ; i-- )
{
result += ( ( num[ i ] - '0') * mult );
mult *= 8;
}
return( result );
}
// ===========================================================================
int ty_extensionis( char *name, char *ext )
{
char *ptr;
if ( strlen( ext ) > strlen( name ) ) return( 0 );
ptr = name;
ptr += ( strlen( name ) - strlen( ext ) );
if ( strcmp( ptr, ext ) == 0 ) return( 1 );
return( 0 );
}
// ===========================================================================
int ty_tmf_filetoparts( demuxer_t *demux, TiVoInfo *tivo )
{
char header[ 512 ];
char name[ 100 ];
char sizestr[ 80 ];
int size;
int count;
int blocks;
int done;
off_t offset;
off_t totalsize;
off_t skip;
int error = 0;
int parts = 0;
int isty;
int index;
int ok;
offset = 0;
totalsize = demux->stream->end_pos;
done = 0;
mp_msg( MSGT_DEMUX, MSGL_DBG3, "Dumping tar contents\n" );
while ( done == 0 )
{
ok = stream_seek( demux->stream, offset );
if ( ( offset + 512 ) == totalsize )
{
done = 1;
break;
}
if ( ok == 0 )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3, "Seek bad %"PRId64"\n", (int64_t)offset );
done = 1;
error = 1;
break;
}
count = stream_read( demux->stream, header, 512 );
if ( count < 512 )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3, "Read bad\n" );
done = 1;
error = 1;
break;
}
strlcpy( name, &header[ 0 ], 100 );
strlcpy( sizestr, &header[ 124 ], 12 );
size = ty_octaltodecimal( sizestr );
blocks = size / 512;
if ( ( size % 512 ) > 0 ) blocks++;
skip = ( blocks + 1 ) * 512;
if ( ( offset + skip ) > totalsize )
{
size = totalsize - offset;
}
isty = ty_extensionis( name, ".ty" );
mp_msg( MSGT_DEMUX, MSGL_DBG3, "name %-20.20s size %-12.12s %d %d\n",
name, sizestr, size, isty );
if ( isty )
{
tivo->tmfparts[ parts ].fileNo = parts;
// HACK - Ignore last chunk of a Part File
// Why? I have no idea.
tivo->tmfparts[ parts ].fileSize = size - 0x20000;
tivo->tmfparts[ parts ].startOffset = offset + 512;
tivo->tmfparts[ parts ].chunks =
( tivo->tmfparts[ parts ].fileSize / CHUNKSIZE );
mp_msg
(
MSGT_DEMUX, MSGL_DBG3,
"tmf_filetoparts(): index %d, file %d, chunks %d\n",
parts,
tivo->tmfparts[ parts ].fileNo,
tivo->tmfparts[ parts ].chunks
);
mp_msg
(
MSGT_DEMUX, MSGL_DBG3,
"tmf_filetoparts(): size %"PRId64"\n",
tivo->tmfparts[ parts ].fileSize
);
mp_msg
(
MSGT_DEMUX, MSGL_DBG3,
"tmf_filetoparts(): startOffset %"PRId64"\n",
tivo->tmfparts[ parts ].startOffset
);
parts++;
if ( parts > MAX_TMF_PARTS )
{
mp_msg( MSGT_DEMUX, MSGL_ERR, "ty:tmf too big\n" );
}
}
if ( ( offset + skip ) > totalsize )
{
done = 1;
error = 1;
}
else
{
offset += skip;
}
}
if ( error )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"WARNING : tmf parse error, not intact\n" );
}
tivo->tmf_totalparts = parts;
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"tmf_filetoparts(): No More Part Files %d\n", parts );
tivo->tmf_totalsize = 0;
tivo->tmf_totalchunks = 0;
for( index = 0 ; index < tivo->tmf_totalparts ; index++ )
{
tivo->tmf_totalsize += tivo->tmfparts[ index ].fileSize;
tivo->tmf_totalchunks += ( tivo->tmfparts[ index ].fileSize / CHUNKSIZE );
}
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"tmf_filetoparts():total size %"PRId64"\n", (int64_t)tivo->tmf_totalsize );
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"tmf_filetoparts():total chunks %"PRId64"\n", (int64_t)tivo->tmf_totalchunks );
return( 1 );
}
// ===========================================================================
void tmf_filetooffset( TiVoInfo *tivo, int chunk, off_t *offset )
{
int index;
*offset = 0;
for( index = 0 ; index < tivo->tmf_totalparts ; index++ )
{
if ( chunk >= tivo->tmfparts[ index ].chunks )
{
chunk -= tivo->tmfparts[ index ].chunks;
}
else
{
break;
}
}
if ( chunk < tivo->tmfparts[ index ].chunks )
{
*offset = tivo->tmfparts[ index ].startOffset +
( chunk * CHUNKSIZE );
}
mp_msg
(
MSGT_DEMUX, MSGL_DBG3,
"tmf_filetooffset() offset %"PRIx64"\n", *offset
);
}
// ===========================================================================
int tmf_load_chunk( demuxer_t *demux, TiVoInfo *tivo,
unsigned char *buff, int size, int readChunk )
{
off_t fileoffset;
int count;
mp_msg( MSGT_DEMUX, MSGL_DBG3, "\ntmf_load_chunk() begin %d\n",
readChunk );
if ( tivo->tmf_totalparts <= 0 )
{
return( 0 );
}
if ( readChunk >= tivo->tmf_totalchunks )
{
mp_msg( MSGT_DEMUX, MSGL_ERR, "Read past EOF()\n" );
return( 0 );
}
tmf_filetooffset( tivo, readChunk, &fileoffset );
if ( stream_seek( demux->stream, fileoffset ) != 1 )
{
mp_msg( MSGT_DEMUX, MSGL_ERR, "Read past EOF()\n" );
return( 0 );
}
count = stream_read( demux->stream, buff, size );
demux->filepos = stream_tell( demux->stream );
mp_msg( MSGT_DEMUX, MSGL_DBG3, "tmf_load_chunk() count %x\n",
count );
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"tmf_load_chunk() bytes %x %x %x %x %x %x %x %x\n",
buff[ 0 ], buff[ 1 ], buff[ 2 ], buff[ 3 ],
buff[ 4 ], buff[ 5 ], buff[ 6 ], buff[ 7 ] );
mp_msg( MSGT_DEMUX, MSGL_DBG3, "tmf_load_chunk() end\n" );
return( count );
}
// ===========================================================================
// DTiVo MPEG 336, 480, 576, 768
// SA TiVo 864
// DTiVo AC-3 1550
//
#define SERIES1_PTS_LENGTH ( 11 )
#define SERIES1_PTS_OFFSET ( 6 )
#define SERIES2_PTS_LENGTH ( 16 )
#define SERIES2_PTS_OFFSET ( 9 )
#define AC3_PTS_LENGTH ( 16 )
#define AC3_PTS_OFFSET ( 9 )
#define NUMBER_DIFFERENT_AUDIO_SIZES ( 7 )
static int Series1AudioWithPTS[ NUMBER_DIFFERENT_AUDIO_SIZES ] =
{
336 + SERIES1_PTS_LENGTH,
384 + SERIES1_PTS_LENGTH,
480 + SERIES1_PTS_LENGTH,
576 + SERIES1_PTS_LENGTH,
768 + SERIES1_PTS_LENGTH,
864 + SERIES1_PTS_LENGTH
};
static int Series2AudioWithPTS[ NUMBER_DIFFERENT_AUDIO_SIZES ] =
{
336 + SERIES2_PTS_LENGTH,
384 + SERIES2_PTS_LENGTH,
480 + SERIES2_PTS_LENGTH,
576 + SERIES2_PTS_LENGTH,
768 + SERIES2_PTS_LENGTH,
864 + SERIES2_PTS_LENGTH
};
static int IsValidAudioPacket( int size, int *ptsOffset, int *ptsLen )
{
int count;
*ptsOffset = 0;
*ptsLen = 0;
// AC-3
if ( ( size == 1550 ) || ( size == 1552 ) )
{
*ptsOffset = AC3_PTS_OFFSET;
*ptsLen = AC3_PTS_LENGTH;
return( 1 );
}
// MPEG
for( count = 0 ; count < NUMBER_DIFFERENT_AUDIO_SIZES ; count++ )
{
if ( size == Series1AudioWithPTS[ count ] )
{
*ptsOffset = SERIES1_PTS_OFFSET;
*ptsLen = SERIES1_PTS_LENGTH;
break;
}
}
if ( *ptsOffset == 0 )
{
for( count = 0 ; count < NUMBER_DIFFERENT_AUDIO_SIZES ; count++ )
{
if ( size == Series2AudioWithPTS[ count ] )
{
*ptsOffset = SERIES2_PTS_OFFSET;
*ptsLen = SERIES2_PTS_LENGTH;
break;
}
}
}
if ( *ptsOffset == 0 )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Tossing Audio Packet Size %d\n",
size );
return( 0 );
}
else
{
return( 1 );
}
}
static float get_ty_pts( unsigned char *buf )
{
float result = 0;
unsigned char temp;
temp = ( buf[ 0 ] & 0xE ) >> 1;
result = ( (float) temp ) * ( (float) ( 1L << 30 ) ) / ( (float)PTS_KHZ );
temp = buf[ 1 ];
result += ( (float) temp ) * ( (float) ( 1L << 22 ) ) / ( (float)PTS_KHZ );
temp = ( buf[ 2 ] & 0xFE ) >> 1;
result += ( (float) temp ) * ( (float) ( 1L << 15 ) ) / ( (float)PTS_KHZ );
temp = buf[ 3 ];
result += ( (float) temp ) * ( (float) ( 1L << 7 ) ) / ( (float)PTS_KHZ );
temp = ( buf[ 4 ] & 0xFE ) >> 1;
result += ( (float) temp ) / ( (float)PTS_MHZ );
return result;
}
static void demux_ty_AddToAudioBuffer( TiVoInfo *tivo, unsigned char *buffer,
int size )
{
if ( ( tivo->lastAudioEnd + size ) < MAX_AUDIO_BUFFER )
{
memcpy( &( tivo->lastAudio[ tivo->lastAudioEnd ] ),
buffer, size );
tivo->lastAudioEnd += size;
}
else
{
mp_msg( MSGT_DEMUX, MSGL_ERR,
"ty:WARNING - Would have blown my audio buffer\n" );
}
}
static void demux_ty_CopyToDemuxPacket( int type, TiVoInfo *tivo, demux_stream_t *ds,
unsigned char *buffer, int size, off_t pos, float pts )
{
demux_packet_t *dp;
// mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Calling ds_add_packet() %7.1f\n", pts );
// printf( "%x %x %x %x\n",
// buffer[ 0 ], buffer[ 1 ], buffer[ 2 ], buffer[ 3 ] );
dp = new_demux_packet( size );
memcpy( dp->buffer, buffer, size );
dp->pts = pts;
dp->pos = pos;
dp->flags = 0;
ds_add_packet( ds, dp );
ds->pts = pts;
if ( type == TY_V )
{
if ( tivo->firstVideoPTS == -1 )
{
tivo->firstVideoPTS = pts;
}
}
if ( type == TY_A )
{
if ( tivo->firstAudioPTS == -1 )
{
tivo->firstAudioPTS = pts;
}
}
}
static int demux_ty_FindESHeader( unsigned char *header, int headerSize,
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 );
}
static void demux_ty_FindESPacket( unsigned char *header, int headerSize,
unsigned char *buffer, int bufferSize, int *esOffset1, int *esOffset2 )
{
int count;
*esOffset1 = -1;
*esOffset2 = -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;
break;
}
}
if ( *esOffset1 != -1 )
{
for( count = *esOffset1 + 1 ;
count < bufferSize ; count++ )
{
if ( ( buffer[ count + 0 ] == header[ 0 ] ) &&
( buffer[ count + 1 ] == header[ 1 ] ) &&
( buffer[ count + 2 ] == header[ 2 ] ) &&
( buffer[ count + 3 ] == header[ 3 ] ) )
{
*esOffset2 = count;
break;
}
}
}
}
static int tivobuffer2hostlong( unsigned char *buffer )
{
return
(
buffer[ 0 ] << 24 | buffer[ 1 ] << 16 | buffer[ 2 ] << 8 | buffer[ 3 ]
);
}
static unsigned char ty_VideoPacket[] = { 0x00, 0x00, 0x01, 0xe0 };
static unsigned char ty_MPEGAudioPacket[] = { 0x00, 0x00, 0x01, 0xc0 };
static unsigned char ty_AC3AudioPacket[] = { 0x00, 0x00, 0x01, 0xbd };
static int demux_ty_fill_buffer( demuxer_t *demux, demux_stream_t *dsds )
{
int invalidType = 0;
int errorHeader = 0;
int recordsDecoded = 0;
off_t filePos = 0;
unsigned char chunk[ CHUNKSIZE ];
int whichChunk;
int readSize;
unsigned int pesFileId = 0;
int numberRecs;
unsigned char *recPtr;
int offset;
int size;
int type;
int nybbleType;
int counter;
int aid;
demux_stream_t *ds = NULL;
int esOffset1;
int esOffset2;
unsigned char lastCC[ 16 ];
unsigned char lastXDS[ 16 ];
TiVoInfo *tivo = 0;
if ( demux->stream->type == STREAMTYPE_DVD )
{
return( 0 );
}
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:ty processing\n" );
if ( ( demux->a_streams[ MAX_A_STREAMS - 1 ] ) == 0 )
{
demux->a_streams[ MAX_A_STREAMS - 1 ] = malloc( sizeof( TiVoInfo ) );
tivo = demux->a_streams[ MAX_A_STREAMS - 1 ];
memset( tivo, 0, sizeof( TiVoInfo ) );
tivo->firstAudioPTS = -1;
tivo->firstVideoPTS = -1;
}
else
{
tivo = demux->a_streams[ MAX_A_STREAMS - 1 ];
}
if( demux->stream->eof ) return 0;
// ======================================================================
// If we haven't figured out the size of the stream, let's do so
// ======================================================================
#ifdef STREAMTYPE_STREAM_TY
if ( demux->stream->type == STREAMTYPE_STREAM_TY )
{
// The vstream code figures out the exact size of the stream
demux->movi_start = 0;
demux->movi_end = vstream_streamsize();
tivo->size = vstream_streamsize();
}
else
#endif
{
// If its a local file, try to find the Part Headers, so we can
// calculate the ACTUAL stream size
// If we can't find it, go off with the file size and hope the
// extract program did the "right thing"
if ( tivo->readHeader == 0 )
{
tivo->readHeader = 1;
tivo->size = demux->stream->end_pos;
filePos = demux->filepos;
stream_seek( demux->stream, 0 );
// mp_msg( MSGT_DEMUX, MSGL_DBG3,
// "ty:Reading a chunk %d\n", __LINE__ );
readSize = stream_read( demux->stream, chunk, CHUNKSIZE );
if ( memcmp( chunk, TMF_SIG, sizeof( TMF_SIG ) ) == 0 )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Detected a tmf\n" );
tivo->tmf = 1;
ty_tmf_filetoparts( demux, tivo );
readSize = tmf_load_chunk( demux, tivo, chunk, CHUNKSIZE, 0 );
}
if ( readSize == CHUNKSIZE )
{
tivo->pesFileId = tivobuffer2hostlong( &chunk[ 0x00 ] );
tivo->streamType = tivobuffer2hostlong( &chunk[ 0x04 ] );
tivo->chunkSize = tivobuffer2hostlong( &chunk[ 0x08 ] );
if ( tivo->pesFileId == TIVO_PES_FILEID )
{
off_t numberParts;
readSize = 0;
if ( tivo->tmf != 1 )
{
off_t size;
off_t offset;
numberParts = demux->stream->end_pos / TIVO_PART_LENGTH;
offset = numberParts * TIVO_PART_LENGTH;
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:ty/ty+Number Parts %"PRId64"\n",
(int64_t)numberParts );
if ( ( offset + CHUNKSIZE ) < demux->stream->end_pos )
{
stream_seek( demux->stream, offset );
readSize = stream_read( demux->stream, chunk, CHUNKSIZE );
}
}
else
{
numberParts = tivo->tmf_totalparts;
offset = numberParts * TIVO_PART_LENGTH;
readSize = tmf_load_chunk( demux, tivo, chunk, CHUNKSIZE,
( numberParts * ( TIVO_PART_LENGTH - 0x20000 ) /
CHUNKSIZE ) );
}
if ( readSize == CHUNKSIZE )
{
pesFileId = tivobuffer2hostlong( &chunk[ 0x00 ] );
if ( pesFileId == TIVO_PES_FILEID )
{
size = tivobuffer2hostlong( &chunk[ 0x0c ] );
size /= 256;
size -= 4;
size *= CHUNKSIZE;
tivo->size = numberParts * TIVO_PART_LENGTH;
tivo->size += size;
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:Header Calc Stream Size %"PRId64"\n", tivo->size );
}
}
}
}
if ( tivo->size > demux->stream->end_pos )
{
tivo->size = demux->stream->end_pos;
}
if ( demux->stream->start_pos > 0 )
{
filePos = demux->stream->start_pos;
}
stream_seek( demux->stream, filePos );
demux->filepos = stream_tell( demux->stream );
tivo->whichChunk = ( filePos / CHUNKSIZE );
}
demux->movi_start = 0;
demux->movi_end = tivo->size;
}
// ======================================================================
// Give a clue as to where we are in the stream
// ======================================================================
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:ty header size %"PRIx64"\n", (int64_t)tivo->size );
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:ty which Chunk %d\n", tivo->whichChunk );
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:file end_pos %"PRIx64"\n", (int64_t)demux->stream->end_pos );
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"\nty:wanted current offset %"PRIx64"\n", (int64_t)stream_tell( demux->stream ) );
if ( tivo->size > 0 )
{
if ( stream_tell( demux->stream ) > tivo->size )
{
demux->stream->eof = 1;
return( 0 );
}
}
if ( tivo->tmf != 1 )
{
// Make sure we are on a 128k boundary
if ( ( demux->filepos % CHUNKSIZE ) != 0 )
{
whichChunk = demux->filepos / CHUNKSIZE;
if ( ( demux->filepos % CHUNKSIZE ) > ( CHUNKSIZE / 2 ) )
{
whichChunk++;
}
stream_seek( demux->stream, ( whichChunk * CHUNKSIZE ) );
}
demux->filepos = stream_tell( demux->stream );
tivo->whichChunk = demux->filepos / CHUNKSIZE;
readSize = stream_read( demux->stream, chunk, CHUNKSIZE );
if ( readSize != CHUNKSIZE )
{
return( 0 );
}
}
else
{
readSize = tmf_load_chunk( demux, tivo, chunk, CHUNKSIZE,
tivo->whichChunk );
if ( readSize != CHUNKSIZE )
{
return( 0 );
}
tivo->whichChunk++;
}
// We found a part header, skip it
pesFileId = tivobuffer2hostlong( &chunk[ 0x00 ] );
if( pesFileId == TIVO_PES_FILEID )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Skipping PART Header\n" );
if ( tivo->tmf != 1 )
{
demux->filepos = stream_tell( demux->stream );
readSize = stream_read( demux->stream, chunk, CHUNKSIZE );
}
else
{
readSize = tmf_load_chunk( demux, tivo, chunk, CHUNKSIZE,
tivo->whichChunk );
tivo->whichChunk++;
}
if ( readSize != CHUNKSIZE )
{
return( 0 );
}
}
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"\nty:actual current offset %"PRIx64"\n", ( stream_tell( demux->stream ) -
0x20000 ) );
// Let's make a Video Demux Stream for MPlayer
aid = 0x0;
if( !demux->v_streams[ aid ] ) new_sh_video( demux, aid );
if( demux->video->id == -1 ) demux->video->id = aid;
if( demux->video->id == aid )
{
ds = demux->video;
if( !ds->sh ) ds->sh = demux->v_streams[ aid ];
}
// ======================================================================
// Finally, we get to actually parse the chunk
// ======================================================================
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:ty parsing a chunk\n" );
numberRecs = chunk[ 0 ];
recPtr = &chunk[ 4 ];
offset = ( numberRecs * 16 ) + 4;
for ( counter = 0 ; counter < numberRecs ; counter++ )
{
size = ( recPtr[ 0 ] << 8 | recPtr[ 1 ] ) << 4 | ( recPtr[ 2 ] >> 4 );
type = recPtr[ 3 ];
nybbleType = recPtr[ 2 ] & 0x0f;
recordsDecoded++;
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:Record Type %x/%x %d\n", nybbleType, type, size );
// ================================================================
// Video Parsing
// ================================================================
if ( type == 0xe0 )
{
if ( ( size > 0 ) && ( ( size + offset ) <= CHUNKSIZE ) )
{
#if 0
printf( "Video Chunk Header " );
for( count = 0 ; count < 24 ; count++ )
{
printf( "%2.2x ", chunk[ offset + count ] );
}
printf( "\n" );
#endif
demux_ty_FindESHeader( ty_VideoPacket, 4, &chunk[ offset ],
size, &esOffset1 );
if ( esOffset1 != -1 )
{
tivo->lastVideoPTS = get_ty_pts(
&chunk[ offset + esOffset1 + 9 ] );
mp_msg( MSGT_DEMUX, MSGL_DBG3, "Video PTS %7.1f\n",
tivo->lastVideoPTS );
}
// Do NOT Pass the PES Header onto the MPEG2 Decode
if( nybbleType != 0x06 )
{
demux_ty_CopyToDemuxPacket( TY_V, tivo, demux->video,
&chunk[ offset ], size, ( demux->filepos + offset ),
tivo->lastVideoPTS );
}
offset += size;
}
else
{
errorHeader++;
}
}
// ================================================================
// Audio Parsing
// ================================================================
else if ( type == 0xc0 )
{
if ( ( size > 0 ) && ( ( size + offset ) <= CHUNKSIZE ) )
{
#if 0
printf( "Audio Chunk Header " );
for( count = 0 ; count < 24 ; count++ )
{
printf( "%2.2x ", chunk[ offset + count ] );
}
printf( "\n" );
#endif
if( demux->audio->id == -1 )
{
if ( nybbleType == 0x02 )
{
continue; // DTiVo inconclusive, wait for more
}
else if ( nybbleType == 0x09 )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Setting AC-3 Audio\n" );
aid = 0x80; // AC-3
}
else
{
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Setting MPEG Audio\n" );
aid = 0x0; // MPEG Audio
}
demux->audio->id = aid;
if( !demux->a_streams[ aid ] ) new_sh_audio( demux, aid );
if( demux->audio->id == aid )
{
ds = demux->audio;
if( !ds->sh ) {
sh_audio_t* sh_a;
ds->sh = demux->a_streams[ aid ];
sh_a = (sh_audio_t*)ds->sh;
switch(aid & 0xE0){ // 1110 0000 b (high 3 bit: type low 5: id)
case 0x00: sh_a->format=0x50;break; // mpeg
case 0xA0: sh_a->format=0x10001;break; // dvd pcm
case 0x80: if((aid & 0xF8) == 0x88) sh_a->format=0x2001;//dts
else sh_a->format=0x2000;break; // ac3
}
}
}
}
aid = demux->audio->id;
// SA DTiVo Audio Data, no PES
// ================================================
if ( nybbleType == 0x02 )
{
if ( tivo->tivoType == 2 )
{
demux_ty_AddToAudioBuffer( tivo, &chunk[ offset ], size );
}
else
{
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:Adding Audio Packet Size %d\n", size );
demux_ty_CopyToDemuxPacket( TY_A, tivo, demux->audio,
&chunk[ offset ], size, ( demux->filepos + offset ),
tivo->lastAudioPTS );
}
}
// MPEG Audio with PES Header, either SA or DTiVo
// ================================================
if ( nybbleType == 0x03 )
{
demux_ty_FindESHeader( ty_MPEGAudioPacket, 4, &chunk[ offset ],
size, &esOffset1 );
// SA PES Header, No Audio Data
// ================================================
if ( ( esOffset1 == 0 ) && ( size == 16 ) )
{
tivo->tivoType = 1;
tivo->lastAudioPTS = get_ty_pts( &chunk[ offset +
SERIES2_PTS_OFFSET ] );
mp_msg( MSGT_DEMUX, MSGL_DBG3, "SA Audio PTS %7.1f\n",
tivo->lastAudioPTS );
}
else
// DTiVo Audio with PES Header
// ================================================
{
tivo->tivoType = 2;
demux_ty_AddToAudioBuffer( tivo, &chunk[ offset ], size );
demux_ty_FindESPacket( ty_MPEGAudioPacket, 4,
tivo->lastAudio, tivo->lastAudioEnd, &esOffset1,
&esOffset2 );
if ( ( esOffset1 != -1 ) && ( esOffset2 != -1 ) )
{
int packetSize = esOffset2 - esOffset1;
int headerSize;
int ptsOffset;
if ( IsValidAudioPacket( packetSize, &ptsOffset,
&headerSize ) )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:Adding DTiVo Audio Packet Size %d\n",
packetSize );
tivo->lastAudioPTS = get_ty_pts(
&tivo->lastAudio[ esOffset1 + ptsOffset ] );
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"MPEG Audio PTS %7.1f\n", tivo->lastAudioPTS );
demux_ty_CopyToDemuxPacket
(
TY_A,
tivo,
demux->audio,
&( tivo->lastAudio[ esOffset1 + headerSize ] ),
( packetSize - headerSize ),
( demux->filepos + offset ),
tivo->lastAudioPTS
);
}
// Collapse the Audio Buffer
memmove( &(tivo->lastAudio[ 0 ] ),
&( tivo->lastAudio[ esOffset2 ] ),
( tivo->lastAudioEnd - esOffset2 ) );
tivo->lastAudioEnd -= esOffset2;
}
}
}
// SA Audio with no PES Header
// ================================================
if ( nybbleType == 0x04 )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:Adding Audio Packet Size %d\n", size );
demux_ty_CopyToDemuxPacket( TY_A, tivo, demux->audio,
&chunk[ offset ], size, ( demux->filepos + offset ),
tivo->lastAudioPTS );
}
// DTiVo AC3 Audio Data with PES Header
// ================================================
if ( nybbleType == 0x09 )
{
tivo->tivoType = 2;
demux_ty_AddToAudioBuffer( tivo, &chunk[ offset ], size );
demux_ty_FindESPacket( ty_AC3AudioPacket, 4,
tivo->lastAudio, tivo->lastAudioEnd, &esOffset1,
&esOffset2 );
if ( ( esOffset1 != -1 ) && ( esOffset2 != -1 ) )
{
int packetSize = esOffset2 - esOffset1;
int headerSize;
int ptsOffset;
if ( IsValidAudioPacket( packetSize, &ptsOffset,
&headerSize ) )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:Adding DTiVo Audio Packet Size %d\n",
packetSize );
tivo->lastAudioPTS = get_ty_pts(
&tivo->lastAudio[ esOffset1 + ptsOffset ] );
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"AC3 Audio PTS %7.1f\n", tivo->lastAudioPTS );
// AC3 Decoder WANTS the PTS
demux_ty_CopyToDemuxPacket
(
TY_A,
tivo,
demux->audio,
&( tivo->lastAudio[ esOffset1 ] ),
( packetSize ),
( demux->filepos + offset ),
tivo->lastAudioPTS
);
}
// Collapse the Audio Buffer
memmove( &(tivo->lastAudio[ 0 ] ),
&( tivo->lastAudio[ esOffset2 ] ),
( tivo->lastAudioEnd - esOffset2 ) );
tivo->lastAudioEnd -= esOffset2;
}
}
offset += size;
}
else
{
errorHeader++;
}
}
// ================================================================
// Closed Caption
// ================================================================
else if ( type == 0x01 )
{
unsigned char b1;
unsigned char b2;
b1 = ( ( ( recPtr[ 0 ] & 0x0f ) << 4 ) |
( ( recPtr[ 1 ] & 0xf0 ) >> 4 ) );
b1 &= 0x7f;
b2 = ( ( ( recPtr[ 1 ] & 0x0f ) << 4 ) |
( ( recPtr[ 2 ] & 0xf0 ) >> 4 ) );
b2 &= 0x7f;
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:CC %x %x\n", b1, b2 );
lastCC[ 0x00 ] = 0x00;
lastCC[ 0x01 ] = 0x00;
lastCC[ 0x02 ] = 0x01;
lastCC[ 0x03 ] = 0xb2;
lastCC[ 0x04 ] = 'T';
lastCC[ 0x05 ] = 'Y';
lastCC[ 0x06 ] = 0x01;
lastCC[ 0x07 ] = b1;
lastCC[ 0x08 ] = b2;
if ( subcc_enabled )
{
demux_ty_CopyToDemuxPacket( TY_V, tivo, demux->video, lastCC, 0x09,
( demux->filepos + offset ), tivo->lastVideoPTS );
}
}
// ================================================================
// Extended Data Services
// ================================================================
else if ( type == 0x02 )
{
unsigned char b1;
unsigned char b2;
b1 = ( ( ( recPtr[ 0 ] & 0x0f ) << 4 ) |
( ( recPtr[ 1 ] & 0xf0 ) >> 4 ) );
b1 &= 0x7f;
b2 = ( ( ( recPtr[ 1 ] & 0x0f ) << 4 ) |
( ( recPtr[ 2 ] & 0xf0 ) >> 4 ) );
b2 &= 0x7f;
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:XDS %x %x\n", b1, b2 );
lastXDS[ 0x00 ] = 0x00;
lastXDS[ 0x01 ] = 0x00;
lastXDS[ 0x02 ] = 0x01;
lastXDS[ 0x03 ] = 0xb2;
lastXDS[ 0x04 ] = 'T';
lastXDS[ 0x05 ] = 'Y';
lastXDS[ 0x06 ] = 0x02;
lastXDS[ 0x07 ] = b1;
lastXDS[ 0x08 ] = b2;
if ( subcc_enabled )
{
demux_ty_CopyToDemuxPacket( TY_V, tivo, demux->video, lastXDS, 0x09,
( demux->filepos + offset ), tivo->lastVideoPTS );
}
}
// ================================================================
// Found a 0x03 on Droid's TiVo, I have no idea what it is
// ================================================================
else if ( type == 0x03 )
{
if ( ( size > 0 ) && ( ( size + offset ) <= CHUNKSIZE ) )
{
offset += size;
}
}
// ================================================================
// Found a 0x03 on Hermit's TiVo, I have no idea what it is
// ================================================================
else if ( type == 0x03 )
{
if ( ( size > 0 ) && ( ( size + offset ) <= CHUNKSIZE ) )
{
offset += size;
}
}
// ================================================================
// Unknown
// ================================================================
else if ( type == 0x05 )
{
if ( ( size > 0 ) && ( ( size + offset ) <= CHUNKSIZE ) )
{
offset += size;
}
}
else
{
if ( ( size > 0 ) && ( ( size + offset ) <= CHUNKSIZE ) )
{
offset += size;
}
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Invalid Type %x\n", type );
invalidType++;
}
recPtr += 16;
}
if ( errorHeader > 0 || invalidType > 0 )
{
mp_msg( MSGT_DEMUX, MSGL_DBG3,
"ty:Error Check - Records %d, Parsed %d, Errors %d + %d\n",
numberRecs, recordsDecoded, errorHeader, invalidType );
// Invalid MPEG ES Size Check
if ( errorHeader > ( numberRecs / 2 ) )
{
return( 0 );
}
// Invalid MPEG Stream Type Check
if ( invalidType > ( numberRecs / 2 ) )
{
return( 0 );
}
}
demux->filepos = stream_tell( demux->stream );
return( 1 );
}
static void demux_seek_ty( demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags )
{
demux_stream_t *d_audio = demuxer->audio;
demux_stream_t *d_video = demuxer->video;
sh_audio_t *sh_audio = d_audio->sh;
sh_video_t *sh_video = d_video->sh;
off_t newpos;
off_t res;
TiVoInfo *tivo = 0;
mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Seeking to %7.1f\n", rel_seek_secs );
if ( ( demuxer->a_streams[ MAX_A_STREAMS - 1 ] ) != 0 )
{
tivo = demuxer->a_streams[ MAX_A_STREAMS - 1 ];
tivo->lastAudioEnd = 0;
tivo->lastAudioPTS = 0;
tivo->lastVideoPTS = 0;
}
//
//================= seek in MPEG ==========================
demuxer->filepos = stream_tell( demuxer->stream );
newpos = ( flags & 1 ) ? demuxer->movi_start : demuxer->filepos;
if( flags & 2 )
{
// float seek 0..1
newpos += ( demuxer->movi_end - demuxer->movi_start ) * rel_seek_secs;
}
else
{
// time seek (secs)
if( ! sh_video->i_bps ) // unspecified or VBR
{
newpos += 2324 * 75 * rel_seek_secs; // 174.3 kbyte/sec
}
else
{
newpos += sh_video->i_bps * rel_seek_secs;
}
}
if ( newpos < demuxer->movi_start )
{
if( demuxer->stream->type != STREAMTYPE_VCD ) demuxer->movi_start = 0;
if( newpos < demuxer->movi_start ) newpos = demuxer->movi_start;
}
res = newpos / CHUNKSIZE;
if ( rel_seek_secs >= 0 )
{
newpos = ( res + 1 ) * CHUNKSIZE;
}
else
{
newpos = res * CHUNKSIZE;
}
if ( newpos < 0 )
{
newpos = 0;
}
tivo->whichChunk = newpos / CHUNKSIZE;
stream_seek( demuxer->stream, newpos );
// re-sync video:
videobuf_code_len = 0; // reset ES stream buffer
ds_fill_buffer( d_video );
if( sh_audio )
{
ds_fill_buffer( d_audio );
}
while( 1 )
{
int i;
if( sh_audio && !d_audio->eof && d_video->pts && d_audio->pts )
{
float a_pts = d_audio->pts;
a_pts += ( ds_tell_pts( d_audio ) - sh_audio->a_in_buffer_len ) /
(float)sh_audio->i_bps;
if( d_video->pts > a_pts )
{
skip_audio_frame( sh_audio ); // sync audio
continue;
}
}
i = sync_video_packet( d_video );
if( i == 0x1B3 || i == 0x1B8 ) break; // found it!
if( !i || !skip_video_packet( d_video ) ) break; // EOF?
}
if ( subcc_enabled )
{
ty_ClearOSD( 0 );
}
}
int demux_ty_control( demuxer_t *demuxer,int cmd, void *arg )
{
demux_stream_t *d_video = demuxer->video;
sh_video_t *sh_video = d_video->sh;
switch(cmd)
{
case DEMUXER_CTRL_GET_TIME_LENGTH:
if(!sh_video->i_bps) // unspecified or VBR
return DEMUXER_CTRL_DONTKNOW;
*((double *)arg)=
((double)demuxer->movi_end-demuxer->movi_start)/sh_video->i_bps;
return DEMUXER_CTRL_GUESS;
case DEMUXER_CTRL_GET_PERCENT_POS:
return DEMUXER_CTRL_DONTKNOW;
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
static void demux_close_ty( demuxer_t *demux )
{
TiVoInfo *tivo = 0;
if ( ( demux->a_streams[ MAX_A_STREAMS - 1 ] ) != 0 )
{
tivo = demux->a_streams[ MAX_A_STREAMS - 1 ];
free( tivo );
demux->a_streams[ MAX_A_STREAMS - 1 ] = 0;
sub_justify = 0;
}
}
static int ty_check_file(demuxer_t* demuxer)
{
return ds_fill_buffer(demuxer->video) ? DEMUXER_TYPE_MPEG_TY : 0;
}
static demuxer_t* demux_open_ty(demuxer_t* demuxer)
{
sh_audio_t *sh_audio=NULL;
sh_video_t *sh_video=NULL;
sh_video=demuxer->video->sh;sh_video->ds=demuxer->video;
if(demuxer->audio->id!=-2) {
if(!ds_fill_buffer(demuxer->audio)){
mp_msg(MSGT_DEMUXER,MSGL_INFO,"MPEG: " MSGTR_MissingAudioStream);
demuxer->audio->sh=NULL;
} else {
sh_audio=demuxer->audio->sh;sh_audio->ds=demuxer->audio;
}
}
return demuxer;
}
demuxer_desc_t demuxer_desc_mpeg_ty = {
"TiVo demuxer",
"tivo",
"TiVo",
"Christopher R. Wingert",
"Demux streams from TiVo",
DEMUXER_TYPE_MPEG_TY,
0, // unsafe autodetect
ty_check_file,
demux_ty_fill_buffer,
demux_open_ty,
demux_close_ty,
demux_seek_ty,
demux_ty_control
};
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