rendered paste body/* $Id: dvd.c,v 1.12 2005/11/25 15:05:25 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
#include "lang.h"
#include "dvdread/ifo_read.h"
#include "dvdread/nav_read.h"
struct hb_dvd_s
{
char * path;
dvd_reader_t * reader;
ifo_handle_t * vmg;
int vts;
int ttn;
ifo_handle_t * ifo;
dvd_file_t * file;
pgc_t * pgc;
int cell_start;
int cell_end;
int title_start;
int title_end;
int title_block_count;
int cell_cur;
int cell_next;
int cell_overlap;
int block;
int pack_len;
int next_vobu;
int in_cell;
int in_sync;
};
/***********************************************************************
* Local prototypes
**********************************************************************/
static void FindNextCell( hb_dvd_t * );
static int dvdtime2msec( dvd_time_t * );
char * hb_dvd_name( char * path )
{
static char name[1024];
unsigned char unused[1024];
dvd_reader_t * reader;
reader = DVDOpen( path );
if( !reader )
{
return NULL;
}
if( DVDUDFVolumeInfo( reader, name, sizeof( name ),
unused, sizeof( unused ) ) )
{
DVDClose( reader );
return NULL;
}
DVDClose( reader );
return name;
}
/***********************************************************************
* hb_dvd_init
***********************************************************************
*
**********************************************************************/
hb_dvd_t * hb_dvd_init( char * path )
{
hb_dvd_t * d;
d = calloc( sizeof( hb_dvd_t ), 1 );
/* Open device */
if( !( d->reader = DVDOpen( path ) ) )
{
hb_error( "dvd: DVDOpen failed (%s)", path );
goto fail;
}
/* Open main IFO */
if( !( d->vmg = ifoOpen( d->reader, 0 ) ) )
{
hb_error( "dvd: ifoOpen failed" );
goto fail;
}
d->path = strdup( path );
return d;
fail:
if( d->vmg ) ifoClose( d->vmg );
if( d->reader ) DVDClose( d->reader );
free( d );
return NULL;
}
/***********************************************************************
* hb_dvd_title_count
**********************************************************************/
int hb_dvd_title_count( hb_dvd_t * d )
{
return d->vmg->tt_srpt->nr_of_srpts;
}
/***********************************************************************
* hb_dvd_title_scan
**********************************************************************/
hb_title_t * hb_dvd_title_scan( hb_dvd_t * d, int t )
{
hb_title_t * title;
ifo_handle_t * vts = NULL;
int pgc_id, pgn, i;
hb_chapter_t * chapter, * chapter_old;
int c;
uint64_t duration;
float duration_correction;
unsigned char unused[1024];
hb_log( "scan: scanning title %d", t );
title = hb_title_init( d->path, t );
if( DVDUDFVolumeInfo( d->reader, title->name, sizeof( title->name ),
unused, sizeof( unused ) ) )
{
char * p_cur, * p_last = d->path;
for( p_cur = d->path; *p_cur; p_cur++ )
{
if( p_cur[0] == '/' && p_cur[1] )
{
p_last = &p_cur[1];
}
}
snprintf( title->name, sizeof( title->name ), "%s", p_last );
}
/* VTS which our title is in */
title->vts = d->vmg->tt_srpt->title[t-1].title_set_nr;
hb_log( "scan: opening IFO for VTS %d", title->vts );
if( !( vts = ifoOpen( d->reader, title->vts ) ) )
{
hb_error( "scan: ifoOpen failed" );
goto fail;
}
/* Position of the title in the VTS */
title->ttn = d->vmg->tt_srpt->title[t-1].vts_ttn;
/* Get pgc */
pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgcn;
pgn = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgn;
d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
hb_log("pgc_id: %d, pgn: %d: pgc: 0x%x", pgc_id, pgn, d->pgc);
if( !d->pgc )
{
hb_error( "scan: pgc not valid, skipping" );
goto fail;
}
/* Start cell */
title->cell_start = d->pgc->program_map[pgn-1] - 1;
title->block_start = d->pgc->cell_playback[title->cell_start].first_sector;
/* End cell */
title->cell_end = d->pgc->nr_of_cells - 1;
title->block_end = d->pgc->cell_playback[title->cell_end].last_sector;
/* Block count */
title->block_count = 0;
d->cell_cur = title->cell_start;
while( d->cell_cur <= title->cell_end )
{
#define cp d->pgc->cell_playback[d->cell_cur]
title->block_count += cp.last_sector + 1 - cp.first_sector;
#undef cp
FindNextCell( d );
d->cell_cur = d->cell_next;
}
hb_log( "scan: vts=%d, ttn=%d, cells=%d->%d, blocks=%d->%d, "
"%d blocks", title->vts, title->ttn, title->cell_start,
title->cell_end, title->block_start, title->block_end,
title->block_count );
if( title->block_count < 2048 )
{
hb_log( "scan: title too short (%d blocks), ignoring",
title->block_count );
goto fail;
}
/* Get duration */
title->duration = 90LL * dvdtime2msec( &d->pgc->playback_time );
title->hours = title->duration / 90000 / 3600;
title->minutes = ( ( title->duration / 90000 ) % 3600 ) / 60;
title->seconds = ( title->duration / 90000 ) % 60;
hb_log( "scan: duration is %02d:%02d:%02d (%lld ms)",
title->hours, title->minutes, title->seconds,
title->duration / 90 );
/* Discard titles under 10 seconds */
if( !( title->hours | title->minutes ) && title->seconds < 10 )
{
hb_log( "scan: ignoring title (too short)" );
goto fail;
}
/* Detect languages */
for( i = 0; i < vts->vtsi_mat->nr_of_vts_audio_streams; i++ )
{
hb_audio_t * audio, * audio_tmp;
int audio_format, lang_code, audio_control,
position, j;
iso639_lang_t * lang;
hb_log( "scan: checking audio %d", i + 1 );
audio = calloc( sizeof( hb_audio_t ), 1 );
audio_format = vts->vtsi_mat->vts_audio_attr[i].audio_format;
lang_code = vts->vtsi_mat->vts_audio_attr[i].lang_code;
audio_control =
vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i];
if( !( audio_control & 0x8000 ) )
{
hb_log( "scan: audio channel is not active" );
free( audio );
continue;
}
position = ( audio_control & 0x7F00 ) >> 8;
switch( audio_format )
{
case 0x00:
audio->id = ( ( 0x80 + position ) << 8 ) | 0xbd;
audio->codec = HB_ACODEC_AC3;
break;
case 0x02:
case 0x03:
audio->id = 0xc0 + position;
audio->codec = HB_ACODEC_MPGA;
break;
case 0x04:
audio->id = ( ( 0xa0 + position ) << 8 ) | 0xbd;
audio->codec = HB_ACODEC_LPCM;
break;
case 0x06:
audio->id = ( ( 0x88 + position ) << 8 ) | 0xbd;
audio->codec = HB_ACODEC_DCA;
break;
default:
audio->id = 0;
audio->codec = 0;
hb_log( "scan: unknown audio codec (%x)",
audio_format );
break;
}
if( !audio->id )
{
continue;
}
/* Check for duplicate tracks */
audio_tmp = NULL;
for( j = 0; j < hb_list_count( title->list_audio ); j++ )
{
audio_tmp = hb_list_item( title->list_audio, j );
if( audio->id == audio_tmp->id )
{
break;
}
audio_tmp = NULL;
}
if( audio_tmp )
{
hb_log( "scan: duplicate audio track" );
free( audio );
continue;
}
lang = lang_for_code( vts->vtsi_mat->vts_audio_attr[i].lang_code );
snprintf( audio->lang, sizeof( audio->lang ), "%s (%s)",
strlen(lang->native_name) ? lang->native_name : lang->eng_name,
audio->codec == HB_ACODEC_AC3 ? "AC3" : ( audio->codec ==
HB_ACODEC_DCA ? "DTS" : ( audio->codec ==
HB_ACODEC_MPGA ? "MPEG" : "LPCM" ) ) );
snprintf( audio->lang_simple, sizeof( audio->lang_simple ), "%s",
strlen(lang->native_name) ? lang->native_name : lang->eng_name );
snprintf( audio->iso639_2, sizeof( audio->iso639_2 ), "%s",
lang->iso639_2);
hb_log( "scan: id=%x, lang=%s, 3cc=%s", audio->id,
audio->lang, audio->iso639_2 );
hb_list_add( title->list_audio, audio );
}
if( !hb_list_count( title->list_audio ) )
{
hb_log( "scan: ignoring title (no audio track)" );
goto fail;
}
memcpy( title->palette,
vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->palette,
16 * sizeof( uint32_t ) );
/* Check for subtitles */
for( i = 0; i < vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
{
hb_subtitle_t * subtitle;
int spu_control;
int position;
iso639_lang_t * lang;
hb_log( "scan: checking subtitle %d", i + 1 );
spu_control =
vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i];
if( !( spu_control & 0x80000000 ) )
{
hb_log( "scan: subtitle channel is not active" );
continue;
}
if( vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
{
switch( vts->vtsi_mat->vts_video_attr.permitted_df )
{
case 1:
position = spu_control & 0xFF;
break;
case 2:
position = ( spu_control >> 8 ) & 0xFF;
break;
default:
position = ( spu_control >> 16 ) & 0xFF;
}
}
else
{
position = ( spu_control >> 24 ) & 0x7F;
}
lang = lang_for_code( vts->vtsi_mat->vts_subp_attr[i].lang_code );
subtitle = calloc( sizeof( hb_subtitle_t ), 1 );
subtitle->id = ( ( 0x20 + position ) << 8 ) | 0xbd;
snprintf( subtitle->lang, sizeof( subtitle->lang ), "%s",
strlen(lang->native_name) ? lang->native_name : lang->eng_name);
snprintf( subtitle->iso639_2, sizeof( subtitle->iso639_2 ), "%s",
lang->iso639_2);
hb_log( "scan: id=%x, lang=%s, 3cc=%s", subtitle->id,
subtitle->lang, subtitle->iso639_2 );
hb_list_add( title->list_subtitle, subtitle );
}
/* Chapters */
hb_log( "scan: title %d has %d chapters", t,
vts->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts );
for( i = 0, c = 1;
i < vts->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts; i++ )
{
int pgc_id_next, pgn_next;
pgc_t * pgc_next;
chapter = calloc( sizeof( hb_chapter_t ), 1 );
/* remember the on-disc chapter number */
chapter->index = i + 1;
pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i].pgcn;
pgn = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i].pgn;
d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
/* Start cell */
chapter->cell_start = d->pgc->program_map[pgn-1] - 1;
chapter->block_start =
d->pgc->cell_playback[chapter->cell_start].first_sector;
/* End cell */
if( i != vts->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts - 1 )
{
/* The cell before the starting cell of the next chapter,
or... */
pgc_id_next = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i+1].pgcn;
pgn_next = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i+1].pgn;
pgc_next = vts->vts_pgcit->pgci_srp[pgc_id_next-1].pgc;
chapter->cell_end = pgc_next->program_map[pgn_next-1] - 2;
if( chapter->cell_end < 0 )
{
/* Huh? */
free( chapter );
continue;
}
}
else
{
/* ... the last cell of the title */
chapter->cell_end = title->cell_end;
}
chapter->block_end =
d->pgc->cell_playback[chapter->cell_end].last_sector;
/* Block count, duration */
pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgcn;
pgn = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgn;
d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
chapter->block_count = 0;
chapter->duration = 0;
d->cell_cur = chapter->cell_start;
while( d->cell_cur <= chapter->cell_end )
{
#define cp d->pgc->cell_playback[d->cell_cur]
chapter->block_count += cp.last_sector + 1 - cp.first_sector;
chapter->duration += 90LL * dvdtime2msec( &cp.playback_time );
#undef cp
FindNextCell( d );
d->cell_cur = d->cell_next;
}
if( chapter->block_count < 2048 && c > 1 )
{
hb_log( "scan: chapter %d(%d) too short (%d blocks, "
"cells=%d->%d), merging", c, chapter->index,
chapter->block_count, chapter->cell_start,
chapter->cell_end );
chapter_old = hb_list_item( title->list_chapter, c - 2 );
chapter_old->cell_end = chapter->cell_end;
chapter_old->block_end = chapter->block_end;
chapter_old->block_count += chapter->block_count;
chapter_old->duration += chapter->duration;
free( chapter );
chapter = chapter_old;
}
else
{
hb_list_add( title->list_chapter, chapter );
c++;
}
}
/* The durations we get for chapters aren't precise. Scale them so
the total matches the title duration */
duration = 0;
for( i = 0; i < hb_list_count( title->list_chapter ); i++ )
{
chapter = hb_list_item( title->list_chapter, i );
duration += chapter->duration;
}
duration_correction = (float) title->duration / (float) duration;
for( i = 0; i < hb_list_count( title->list_chapter ); i++ )
{
int seconds;
chapter = hb_list_item( title->list_chapter, i );
chapter->duration = duration_correction * chapter->duration;
seconds = ( chapter->duration + 45000 ) / 90000;
chapter->hours = seconds / 3600;
chapter->minutes = ( seconds % 3600 ) / 60;
chapter->seconds = seconds % 60;
hb_log( "scan: chap %d c=%d->%d, b=%d->%d (%d), %lld ms",
chapter->index, chapter->cell_start, chapter->cell_end,
chapter->block_start, chapter->block_end,
chapter->block_count, chapter->duration / 90 );
}
/* Get aspect. We don't get width/height/rate infos here as
they tend to be wrong */
switch( vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
{
case 0:
title->aspect = HB_ASPECT_BASE * 4 / 3;
break;
case 3:
title->aspect = HB_ASPECT_BASE * 16 / 9;
break;
default:
hb_log( "scan: unknown aspect" );
goto fail;
}
hb_log( "scan: aspect = %d", title->aspect );
/* This title is ok so far */
goto cleanup;
fail:
hb_list_close( &title->list_audio );
free( title );
title = NULL;
cleanup:
if( vts ) ifoClose( vts );
return title;
}
/***********************************************************************
* hb_dvd_start
***********************************************************************
* Title and chapter start at 1
**********************************************************************/
int hb_dvd_start( hb_dvd_t * d, int title, int chapter )
{
int pgc_id, pgn;
int i;
/* Open the IFO and the VOBs for this title */
d->vts = d->vmg->tt_srpt->title[title-1].title_set_nr;
d->ttn = d->vmg->tt_srpt->title[title-1].vts_ttn;
if( !( d->ifo = ifoOpen( d->reader, d->vts ) ) )
{
hb_error( "dvd: ifoOpen failed for VTS %d", d->vts );
return 0;
}
if( !( d->file = DVDOpenFile( d->reader, d->vts,
DVD_READ_TITLE_VOBS ) ) )
{
hb_error( "dvd: DVDOpenFile failed for VTS %d", d->vts );
return 0;
}
/* Get title first and last blocks */
pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[0].pgcn;
pgn = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[0].pgn;
d->pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc;
d->cell_start = d->pgc->program_map[pgn - 1] - 1;
d->cell_end = d->pgc->nr_of_cells - 1;
d->title_start = d->pgc->cell_playback[d->cell_start].first_sector;
d->title_end = d->pgc->cell_playback[d->cell_end].last_sector;
/* Block count */
d->title_block_count = 0;
for( i = d->cell_start; i <= d->cell_end; i++ )
{
d->title_block_count += d->pgc->cell_playback[i].last_sector + 1 -
d->pgc->cell_playback[i].first_sector;
}
/* Get pgc for the current chapter */
pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[chapter-1].pgcn;
pgn = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[chapter-1].pgn;
d->pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc;
/* Get the two first cells */
d->cell_cur = d->pgc->program_map[pgn-1] - 1;
FindNextCell( d );
d->block = d->pgc->cell_playback[d->cell_cur].first_sector;
d->next_vobu = d->block;
d->pack_len = 0;
d->cell_overlap = 0;
d->in_cell = 0;
d->in_sync = 2;
return 1;
}
/***********************************************************************
* hb_dvd_stop
***********************************************************************
*
**********************************************************************/
void hb_dvd_stop( hb_dvd_t * d )
{
if( d->ifo )
{
ifoClose( d->ifo );
d->ifo = NULL;
}
if( d->file )
{
DVDCloseFile( d->file );
d->file = NULL;
}
}
/***********************************************************************
* hb_dvd_seek
***********************************************************************
*
**********************************************************************/
int hb_dvd_seek( hb_dvd_t * d, float f )
{
int count, sizeCell;
int i;
count = f * d->title_block_count;
for( i = d->cell_start; i <= d->cell_end; i++ )
{
sizeCell = d->pgc->cell_playback[i].last_sector + 1 -
d->pgc->cell_playback[i].first_sector;
if( count < sizeCell )
{
d->cell_cur = i;
FindNextCell( d );
/* Now let hb_dvd_read find the next VOBU */
d->next_vobu = d->pgc->cell_playback[i].first_sector + count;
d->pack_len = 0;
break;
}
count -= sizeCell;
}
if( i > d->cell_end )
{
return 0;
}
/*
* Assume that we are in sync, even if we are not given that it is obvious
* that we are out of sync if we have just done a seek.
*/
d->in_sync = 2;
return 1;
}
/***********************************************************************
* is_nav_pack
***********************************************************************/
int is_nav_pack( unsigned char *buf )
{
/*
* The NAV Pack is comprised of the PCI Packet and DSI Packet, both
* of these start at known offsets and start with a special identifier.
*
* NAV = {
* PCI = { 00 00 01 bf # private stream header
* ?? ?? # length
* 00 # substream
* ...
* }
* DSI = { 00 00 01 bf # private stream header
* ?? ?? # length
* 01 # substream
* ...
* }
*
* The PCI starts at offset 0x26 into the sector, and the DSI starts at 0x400
*
* This information from: http://dvd.sourceforge.net/dvdinfo/
*/
if( ( buf[0x26] == 0x00 && // PCI
buf[0x27] == 0x00 &&
buf[0x28] == 0x01 &&
buf[0x29] == 0xbf &&
buf[0x2c] == 0x00 ) &&
( buf[0x400] == 0x00 && // DSI
buf[0x401] == 0x00 &&
buf[0x402] == 0x01 &&
buf[0x403] == 0xbf &&
buf[0x406] == 0x01 ) )
{
return ( 1 );
} else {
return ( 0 );
}
}
/***********************************************************************
* hb_dvd_read
***********************************************************************
*
**********************************************************************/
int hb_dvd_read( hb_dvd_t * d, hb_buffer_t * b )
{
if( !d->pack_len )
{
/* New pack */
dsi_t dsi_pack;
int error;
error = 0;
for( ;; )
{
int block, pack_len, next_vobu, read_retry;
for( read_retry = 0; read_retry < 3; read_retry++ )
{
if( DVDReadBlocks( d->file, d->next_vobu, 1, b->data ) == 1 )
{
/*
* Successful read.
*/
break;
} else {
hb_log( "dvd: Read Error on blk %d, attempt %d",
d->next_vobu, read_retry );
}
}
if( read_retry == 3 )
{
hb_log( "dvd: Unrecoverable Read Error from DVD, potential HD or DVD Failure (blk: %d)", d->next_vobu );
return 0;
}
if ( !is_nav_pack( b->data ) ) {
(d->next_vobu)++;
if( d->in_sync == 1 ) {
hb_log("DVD: Lost sync, searching for NAV pack at blk %d",
d->next_vobu);
d->in_sync = 0;
}
continue;
}
navRead_DSI( &dsi_pack, &b->data[DSI_START_BYTE] );
block = dsi_pack.dsi_gi.nv_pck_lbn;
pack_len = dsi_pack.dsi_gi.vobu_ea;
next_vobu = block + ( dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
if( pack_len > 0 &&
pack_len < 1024 &&
block >= d->next_vobu &&
( block <= d->title_start + d->title_block_count ||
block <= d->title_end ) )
{
/* XXX
This looks like a valid VOBU, but actually we are
just hoping */
if( error )
{
#if 0
hb_log( "dvd: found VOBU at %d (b %d, l %d, n %d)",
d->next_vobu, block, pack_len, next_vobu );
#endif
}
d->block = block;
d->pack_len = pack_len;
d->next_vobu = next_vobu;
break;
}
/* Wasn't a valid VOBU, try next block */
if( !error )
{
#if 0
hb_log( "dvd: looking for a VOBU (%d)", d->next_vobu );
#endif
}
if( ++error > 1024 )
{
hb_log( "dvd: couldn't find a VOBU after 1024 blocks" );
return 0;
}
(d->next_vobu)++;
}
if( d->in_sync == 0 || d->in_sync == 2 )
{
if( d->in_sync == 0 )
{
hb_log( "DVD: In sync with DVD at block %d", d->block );
}
d->in_sync = 1;
}
if( dsi_pack.vobu_sri.next_vobu == SRI_END_OF_CELL )
{
hb_log( "DVD: End of Cell (%d) at block %d", d->cell_cur,
d->block );
d->cell_cur = d->cell_next;
d->in_cell = 0;
d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector;
FindNextCell( d );
d->cell_overlap = 1;
}
// Revert the cell overlap, and check for a chapter break
if( dsi_pack.vobu_sri.prev_vobu == SRI_END_OF_CELL )
{
hb_log( "DVD: Beginning of Cell (%d) at block %d", d->cell_cur,
d->block );
if( d->in_cell )
{
hb_error( "DVD: Assuming missed End of Cell (%d)", d->cell_cur );
d->cell_cur = d->cell_next;
d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector;
FindNextCell( d );
d->cell_overlap = 1;
d->in_cell = 0;
} else {
d->in_cell = 1;
}
if( d->cell_overlap )
{
b->new_chap = hb_dvd_is_break( d );
d->cell_overlap = 0;
}
}
}
else
{
if( DVDReadBlocks( d->file, d->block, 1, b->data ) != 1 )
{
hb_error( "reader: DVDReadBlocks failed (%d)", d->block );
return 0;
}
d->pack_len--;
}
d->block++;
return 1;
}
/***********************************************************************
* hb_dvd_chapter
***********************************************************************
* Returns in which chapter the next block to be read is.
* Chapter numbers start at 1.
**********************************************************************/
int hb_dvd_chapter( hb_dvd_t * d )
{
int i;
int pgc_id, pgn;
int nr_of_ptts = d->ifo->vts_ptt_srpt->title[d->ttn-1].nr_of_ptts;
pgc_t * pgc;
for( i = nr_of_ptts - 1;
i >= 0;
i-- )
{
/* Get pgc for chapter (i+1) */
pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgcn;
pgn = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgn;
pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc;
if( d->cell_cur - d->cell_overlap >= pgc->program_map[pgn-1] - 1 &&
d->cell_cur - d->cell_overlap <= pgc->nr_of_cells - 1 )
{
/* We are in this chapter */
return i + 1;
}
}
/* End of title */
return -1;
}
/***********************************************************************
* hb_dvd_is_break
***********************************************************************
* Returns 1 if the current block is a new chapter start
**********************************************************************/
int hb_dvd_is_break( hb_dvd_t * d )
{
int i, j;
int pgc_id, pgn;
int nr_of_ptts = d->ifo->vts_ptt_srpt->title[d->ttn-1].nr_of_ptts;
pgc_t * pgc;
int cell, chapter_length, cell_end;
for( i = nr_of_ptts - 1;
i > 0;
i-- )
{
/* Get pgc for chapter (i+1) */
pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgcn;
pgn = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgn;
pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc;
cell = pgc->program_map[pgn-1] - 1;
if( cell <= d->cell_start )
break;
// This must not match against the start cell.
if( pgc->cell_playback[cell].first_sector == d->block && cell != d->cell_start )
{
/* Check to see if we merged this chapter into the previous one... */
/* As a note, merging chapters is probably bad practice for this very reason */
chapter_length = 0;
if( i == nr_of_ptts - 1 )
{
cell_end = d->pgc->nr_of_cells;
}
else
{
cell_end = pgc->program_map[pgn] - 1;
}
for( j = cell; j < cell_end; j++ )
{
chapter_length += pgc->cell_playback[j].last_sector + 1 -
pgc->cell_playback[j].first_sector;
}
if( chapter_length >= 2048 )
{
hb_log("DVD: Chapter Break Cell Found");
/* We have a chapter break */
return 1;
}
else
{
hb_log("DVD: Cell Found (len=%d)", chapter_length);
}
}
}
return 0;
}
/***********************************************************************
* hb_dvd_close
***********************************************************************
* Closes and frees everything
**********************************************************************/
void hb_dvd_close( hb_dvd_t ** _d )
{
hb_dvd_t * d = *_d;
if( d->vmg )
{
ifoClose( d->vmg );
}
if( d->reader )
{
DVDClose( d->reader );
}
free( d );
*_d = NULL;
}
/***********************************************************************
* FindNextCell
***********************************************************************
* Assumes pgc and cell_cur are correctly set, and sets cell_next to the
* cell to be read when we will be done with cell_cur.
**********************************************************************/
static void FindNextCell( hb_dvd_t * d )
{
int i = 0;
if( d->pgc->cell_playback[d->cell_cur].block_type ==
BLOCK_TYPE_ANGLE_BLOCK )
{
while( d->pgc->cell_playback[d->cell_cur+i].block_mode !=
BLOCK_MODE_LAST_CELL )
{
i++;
}
d->cell_next = d->cell_cur + i + 1;
hb_log( "DVD: Skipping multi-angle cells %d-%d",
d->cell_cur,
d->cell_next - 1 );
}
else
{
d->cell_next = d->cell_cur + 1;
}
}
/***********************************************************************
* dvdtime2msec
***********************************************************************
* From lsdvd
**********************************************************************/
static int dvdtime2msec(dvd_time_t * dt)
{
double frames_per_s[4] = {-1.0, 25.00, -1.0, 29.97};
double fps = frames_per_s[(dt->frame_u & 0xc0) >> 6];
long ms;
ms = (((dt->hour & 0xf0) >> 3) * 5 + (dt->hour & 0x0f)) * 3600000;
ms += (((dt->minute & 0xf0) >> 3) * 5 + (dt->minute & 0x0f)) * 60000;
ms += (((dt->second & 0xf0) >> 3) * 5 + (dt->second & 0x0f)) * 1000;
if( fps > 0 )
{
ms += ((dt->frame_u & 0x30) >> 3) * 5 +
(dt->frame_u & 0x0f) * 1000.0 / fps;
}
return ms;
}