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vlc/plugins/dvd/input_dvd.c

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/*****************************************************************************
* input_dvd.c: DVD raw reading plugin.
*****************************************************************************
* This plugins should handle all the known specificities of the DVD format,
* especially the 2048 bytes logical block size.
* It depends on:
* -input_netlist used to read packets
* -libdvdcss for access and unscrambling
* -dvd_ifo for ifo parsing and analyse
* -dvd_udf to find files
*****************************************************************************
* Copyright (C) 1998-2001 VideoLAN
* $Id: input_dvd.c,v 1.92 2001/11/07 17:37:16 stef Exp $
*
* Author: Stéphane Borel <stef@via.ecp.fr>
*
* 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.
*****************************************************************************/
#define MODULE_NAME dvd
#include "modules_inner.h"
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "defs.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <fcntl.h>
#include <sys/types.h>
#include <string.h>
#include <errno.h>
#ifdef STRNCASECMP_IN_STRINGS_H
# include <strings.h>
#endif
#if defined( WIN32 )
# include <io.h> /* read() */
#else
# include <sys/uio.h> /* struct iovec */
#endif
#ifdef GOD_DAMN_DMCA
# include "dummy_dvdcss.h"
#else
# include <videolan/dvdcss.h>
#endif
#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "iso_lang.h"
#include "tests.h"
#if defined( WIN32 )
# include "input_iovec.h"
#endif
#include "intf_msg.h"
#include "main.h"
#include "stream_control.h"
#include "input_ext-intf.h"
#include "input_ext-dec.h"
#include "input_ext-plugins.h"
#include "input_dvd.h"
#include "dvd_netlist.h"
#include "dvd_ifo.h"
#include "dvd_summary.h"
#include "debug.h"
#include "modules.h"
#include "modules_export.h"
/* how many blocks DVDRead will read in each loop */
#define DVD_BLOCK_READ_ONCE 64
#define DVD_DATA_READ_ONCE (4 * DVD_BLOCK_READ_ONCE)
/* Size of netlist */
#define DVD_NETLIST_SIZE 256
/*****************************************************************************
* Local prototypes
*****************************************************************************/
/* called from outside */
static int DVDProbe ( probedata_t *p_data );
static void DVDInit ( struct input_thread_s * );
static void DVDEnd ( struct input_thread_s * );
static void DVDOpen ( struct input_thread_s * );
static void DVDClose ( struct input_thread_s * );
static int DVDSetArea ( struct input_thread_s *, struct input_area_s * );
static int DVDRead ( struct input_thread_s *, data_packet_t ** );
static void DVDSeek ( struct input_thread_s *, off_t );
static int DVDRewind ( struct input_thread_s * );
/* called only inside */
static int DVDChooseAngle( thread_dvd_data_t * );
static int DVDFindCell( thread_dvd_data_t * );
static int DVDFindSector( thread_dvd_data_t * );
static int DVDChapterSelect( thread_dvd_data_t *, int );
/*****************************************************************************
* Functions exported as capabilities. They are declared as static so that
* we don't pollute the namespace too much.
*****************************************************************************/
void _M( input_getfunctions )( function_list_t * p_function_list )
{
#define input p_function_list->functions.input
p_function_list->pf_probe = DVDProbe;
input.pf_init = DVDInit;
input.pf_open = DVDOpen;
input.pf_close = DVDClose;
input.pf_end = DVDEnd;
input.pf_init_bit_stream = InitBitstream;
input.pf_read = DVDRead;
input.pf_set_area = DVDSetArea;
input.pf_demux = input_DemuxPS;
input.pf_new_packet = DVDNewPacket;
input.pf_new_pes = DVDNewPES;
input.pf_delete_packet = DVDDeletePacket;
input.pf_delete_pes = DVDDeletePES;
input.pf_rewind = DVDRewind;
input.pf_seek = DVDSeek;
#undef input
}
/*
* Data reading functions
*/
/*****************************************************************************
* DVDProbe: verifies that the stream is a PS stream
*****************************************************************************/
static int DVDProbe( probedata_t *p_data )
{
input_thread_t * p_input = (input_thread_t *)p_data;
char * psz_name = p_input->p_source;
int i_score = 5;
if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
{
return( 999 );
}
if( ( strlen(psz_name) > 4 ) && !strncasecmp( psz_name, "dvd:", 4 ) )
{
/* If the user specified "dvd:" then it's probably a DVD */
i_score = 100;
psz_name += 4;
}
return( i_score );
}
/*****************************************************************************
* DVDInit: initializes DVD structures
*****************************************************************************/
static void DVDInit( input_thread_t * p_input )
{
thread_dvd_data_t * p_dvd;
input_area_t * p_area;
int i_title;
int i_chapter;
int i;
p_dvd = malloc( sizeof(thread_dvd_data_t) );
if( p_dvd == NULL )
{
intf_ErrMsg( "dvd error: out of memory" );
p_input->b_error = 1;
return;
}
p_input->p_plugin_data = (void *)p_dvd;
p_input->p_method_data = NULL;
p_dvd->dvdhandle = (dvdcss_handle) p_input->i_handle;
if( dvdcss_seek( p_dvd->dvdhandle, 0, DVDCSS_NOFLAGS ) < 0 )
{
intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
p_input->b_error = 1;
return;
}
/* We read DVD_BLOCK_READ_ONCE in each loop, so the input will receive
* DVD_DATA_READ_ONCE at most */
p_dvd->i_block_once = DVD_BLOCK_READ_ONCE;
/* this value mustn't be modifed */
p_input->i_read_once = DVD_DATA_READ_ONCE;
/* Reading structures initialisation */
p_input->p_method_data =
DVDNetlistInit( DVD_NETLIST_SIZE, 2 * DVD_NETLIST_SIZE,
DVD_NETLIST_SIZE, DVD_LB_SIZE, p_dvd->i_block_once );
intf_WarnMsg( 2, "dvd info: netlist initialized" );
/* Ifo allocation & initialisation */
if( IfoCreate( p_dvd ) < 0 )
{
intf_ErrMsg( "dvd error: allcation error in ifo" );
dvdcss_close( p_dvd->dvdhandle );
free( p_dvd );
p_input->b_error = 1;
return;
}
if( IfoInit( p_dvd->p_ifo ) < 0 )
{
intf_ErrMsg( "dvd error: fatal failure in ifo" );
IfoDestroy( p_dvd->p_ifo );
dvdcss_close( p_dvd->dvdhandle );
free( p_dvd );
p_input->b_error = 1;
return;
}
/* Set stream and area data */
vlc_mutex_lock( &p_input->stream.stream_lock );
/* Initialize ES structures */
input_InitStream( p_input, sizeof( stream_ps_data_t ) );
#define title_inf p_dvd->p_ifo->vmg.title_inf
intf_WarnMsg( 2, "dvd info: number of titles: %d", title_inf.i_title_nb );
#define area p_input->stream.pp_areas
/* We start from 1 here since the default area 0
* is reserved for video_ts.vob */
for( i = 1 ; i <= title_inf.i_title_nb ; i++ )
{
input_AddArea( p_input );
/* Titles are Program Chains */
area[i]->i_id = i;
/* Absolute start offset and size
* We can only set that with vts ifo, so we do it during the
* first call to DVDSetArea */
area[i]->i_start = 0;
area[i]->i_size = 0;
/* Number of chapters */
area[i]->i_part_nb = title_inf.p_attr[i-1].i_chapter_nb;
area[i]->i_part = 1;
/* Number of angles */
area[i]->i_angle_nb = 0;
area[i]->i_angle = 1;
/* Offset to vts_i_0.ifo */
area[i]->i_plugin_data = p_dvd->p_ifo->i_start +
title_inf.p_attr[i-1].i_start_sector;
}
#undef area
/* Get requested title - if none try the first title */
i_title = main_GetIntVariable( INPUT_TITLE_VAR, 1 );
if( i_title <= 0 || i_title > title_inf.i_title_nb )
{
i_title = 1;
}
#undef title_inf
/* Get requested chapter - if none defaults to first one */
i_chapter = main_GetIntVariable( INPUT_CHAPTER_VAR, 1 );
if( i_chapter <= 0 )
{
i_chapter = 1;
}
p_input->stream.pp_areas[i_title]->i_part = i_chapter;
p_area = p_input->stream.pp_areas[i_title];
/* set title, chapter, audio and subpic */
DVDSetArea( p_input, p_area );
vlc_mutex_unlock( &p_input->stream.stream_lock );
return;
}
/*****************************************************************************
* DVDOpen: open dvd
*****************************************************************************/
static void DVDOpen( struct input_thread_s *p_input )
{
dvdcss_handle dvdhandle;
int i_flags;
vlc_mutex_lock( &p_input->stream.stream_lock );
/* If we are here we can control the pace... */
p_input->stream.b_pace_control = 1;
p_input->stream.b_seekable = 1;
p_input->stream.p_selected_area->i_size = 0;
p_input->stream.p_selected_area->i_tell = 0;
vlc_mutex_unlock( &p_input->stream.stream_lock );
/* Error messages from libdvdcss only in verbose mode */
i_flags = p_main->i_warning_level ? DVDCSS_NOFLAGS : DVDCSS_INIT_QUIET;
/* Debug message from libdvdcss selected from config.h #define */
#ifdef TRACE_DVDCSS
i_flags |= DVDCSS_INIT_DEBUG;
#endif
/* XXX: put this shit in an access plugin */
if( strlen( p_input->p_source ) > 4
&& !strncasecmp( p_input->p_source, "dvd:", 4 ) )
{
dvdhandle = dvdcss_open( p_input->p_source + 4, i_flags );
}
else
{
dvdhandle = dvdcss_open( p_input->p_source, i_flags );
}
if( dvdhandle == NULL )
{
intf_ErrMsg( "dvd error: dvdcss can't open device" );
p_input->b_error = 1;
return;
}
p_input->i_handle = (int) dvdhandle;
}
/*****************************************************************************
* DVDClose: close dvd
*****************************************************************************/
static void DVDClose( struct input_thread_s *p_input )
{
/* Clean up libdvdcss */
dvdcss_close( (dvdcss_handle) p_input->i_handle );
}
/*****************************************************************************
* DVDEnd: frees unused data
*****************************************************************************/
static void DVDEnd( input_thread_t * p_input )
{
thread_dvd_data_t * p_dvd;
dvd_netlist_t * p_netlist;
p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
p_netlist = (dvd_netlist_t *)p_input->p_method_data;
IfoDestroy( p_dvd->p_ifo );
free( p_dvd );
DVDNetlistEnd( p_netlist );
}
/*****************************************************************************
* DVDSetArea: initialize input data for title x, chapter y.
* It should be called for each user navigation request.
*****************************************************************************
* Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
* Note that you have to take the lock before entering here.
*****************************************************************************/
static int DVDSetArea( input_thread_t * p_input, input_area_t * p_area )
{
thread_dvd_data_t * p_dvd;
es_descriptor_t * p_es;
u16 i_id;
int i_vts_title;
int i_audio_nb = 0;
int i_spu_nb = 0;
int i_audio;
int i_spu;
int i;
p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
/* we can't use the interface slider until initilization is complete */
p_input->stream.b_seekable = 0;
if( p_area != p_input->stream.p_selected_area )
{
/* Reset the Chapter position of the old title */
p_input->stream.p_selected_area->i_part = 0;
/*
* We have to load all title information
*/
/* Change the default area */
p_input->stream.p_selected_area =
p_input->stream.pp_areas[p_area->i_id];
/* title number: it is not vts nb!,
* it is what appears in the interface list */
p_dvd->i_title = p_area->i_id;
p_dvd->p_ifo->i_title = p_dvd->i_title;
/* set number of chapters of current title */
p_dvd->i_chapter_nb = p_area->i_part_nb;
/* ifo vts */
if( IfoTitleSet( p_dvd->p_ifo ) < 0 )
{
intf_ErrMsg( "dvd error: fatal error in vts ifo" );
free( p_dvd );
p_input->b_error = 1;
return -1;
}
#define vmg p_dvd->p_ifo->vmg
#define vts p_dvd->p_ifo->vts
/* title position inside the selected vts */
i_vts_title = vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_num;
p_dvd->i_title_id =
vts.title_inf.p_title_start[i_vts_title-1].i_title_id;
intf_WarnMsgImm( 3, "dvd: title %d vts_title %d pgc %d",
p_dvd->i_title, i_vts_title, p_dvd->i_title_id );
/*
* Angle management
*/
p_dvd->i_angle_nb = vmg.title_inf.p_attr[p_dvd->i_title-1].i_angle_nb;
p_dvd->i_angle = main_GetIntVariable( INPUT_ANGLE_VAR, 1 );
if( ( p_dvd->i_angle <= 0 ) || p_dvd->i_angle > p_dvd->i_angle_nb )
{
p_dvd->i_angle = 1;
}
/*
* Set selected title start and size
*/
/* title set offset XXX: convert to block values */
p_dvd->i_title_start =
vts.i_pos + vts.manager_inf.i_title_vob_start_sector;
/* last video cell */
p_dvd->i_cell = 0;
p_dvd->i_prg_cell = -1 +
vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb;
if( DVDFindCell( p_dvd ) < 0 )
{
intf_ErrMsg( "dvd error: can't find title end" );
p_input->b_error = 1;
return -1;
}
/* temporary hack to fix size in some dvds */
if( p_dvd->i_cell >= vts.cell_inf.i_cell_nb )
{
p_dvd->i_cell = vts.cell_inf.i_cell_nb - 1;
}
p_dvd->i_sector = 0;
p_dvd->i_size = vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector;
if( DVDChapterSelect( p_dvd, 1 ) < 0 )
{
intf_ErrMsg( "dvd error: can't find first chapter" );
p_input->b_error = 1;
return -1;
}
/*
* Force libdvdcss to check its title key.
* It is only useful for title cracking method. Methods using the decrypted
* disc key are fast enough to check the key at each seek
*/
if( dvdcss_seek( p_dvd->dvdhandle, p_dvd->i_start, DVDCSS_SEEK_INI ) < 0 )
{
intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
return -1;
}
p_dvd->i_size -= p_dvd->i_sector + 1;
IfoPrintTitle( p_dvd );
/* Area definition */
p_input->stream.p_selected_area->i_start = LB2OFF( p_dvd->i_start );
p_input->stream.p_selected_area->i_size = LB2OFF( p_dvd->i_size );
p_input->stream.p_selected_area->i_angle_nb = p_dvd->i_angle_nb;
p_input->stream.p_selected_area->i_angle = p_dvd->i_angle;
#if 0
/* start at the beginning of the title */
/* FIXME: create a conf option to select whether to restart
* title or not */
p_input->stream.p_selected_area->i_tell = 0;
p_input->stream.p_selected_area->i_part = 1;
#endif
/*
* Destroy obsolete ES by reinitializing program 0
* and find all ES in title with ifo data
*/
if( p_input->stream.pp_programs != NULL )
{
/* We don't use input_EndStream here since
* we keep area structures */
for( i = 0 ; i < p_input->stream.i_selected_es_number ; i++ )
{
input_UnselectES( p_input, p_input->stream.pp_selected_es[i] );
}
free( p_input->stream.pp_selected_es );
input_DelProgram( p_input, p_input->stream.pp_programs[0] );
p_input->stream.pp_selected_es = NULL;
p_input->stream.i_selected_es_number = 0;
}
input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
/* No PSM to read in DVD mode, we already have all information */
p_input->stream.pp_programs[0]->b_is_ok = 1;
p_es = NULL;
/* ES 0 -> video MPEG2 */
IfoPrintVideo( p_dvd );
p_es = input_AddES( p_input, p_input->stream.pp_programs[0], 0xe0, 0 );
p_es->i_stream_id = 0xe0;
p_es->i_type = MPEG2_VIDEO_ES;
p_es->i_cat = VIDEO_ES;
if( p_main->b_video )
{
input_SelectES( p_input, p_es );
}
#define audio_status \
vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_audio_status[i-1]
/* Audio ES, in the order they appear in .ifo */
for( i = 1 ; i <= vts.manager_inf.i_audio_nb ; i++ )
{
IfoPrintAudio( p_dvd, i );
/* audio channel is active if first byte is 0x80 */
if( audio_status.i_available )
{
i_audio_nb++;
switch( vts.manager_inf.p_audio_attr[i-1].i_coding_mode )
{
case 0x00: /* AC3 */
i_id = ( ( 0x80 + audio_status.i_position ) << 8 ) | 0xbd;
p_es = input_AddES( p_input,
p_input->stream.pp_programs[0], i_id, 0 );
p_es->i_stream_id = 0xbd;
p_es->i_type = AC3_AUDIO_ES;
p_es->b_audio = 1;
p_es->i_cat = AUDIO_ES;
strcpy( p_es->psz_desc, DecodeLanguage( hton16(
vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
strcat( p_es->psz_desc, " (ac3)" );
break;
case 0x02:
case 0x03: /* MPEG audio */
i_id = 0xc0 + audio_status.i_position;
p_es = input_AddES( p_input,
p_input->stream.pp_programs[0], i_id, 0 );
p_es->i_stream_id = i_id;
p_es->i_type = MPEG2_AUDIO_ES;
p_es->b_audio = 1;
p_es->i_cat = AUDIO_ES;
strcpy( p_es->psz_desc, DecodeLanguage( hton16(
vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
strcat( p_es->psz_desc, " (mpeg)" );
break;
case 0x04: /* LPCM */
i_id = ( ( 0xa0 + audio_status.i_position ) << 8 ) | 0xbd;
p_es = input_AddES( p_input,
p_input->stream.pp_programs[0], i_id, 0 );
p_es->i_stream_id = i_id;
p_es->i_type = LPCM_AUDIO_ES;
p_es->b_audio = 1;
p_es->i_cat = AUDIO_ES;
strcpy( p_es->psz_desc, DecodeLanguage( hton16(
vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
strcat( p_es->psz_desc, " (lpcm)" );
break;
case 0x06: /* DTS */
i_id = ( ( 0x88 + audio_status.i_position ) << 8 ) | 0xbd;
intf_ErrMsg( "dvd warning: DTS audio not handled yet"
"(0x%x)", i_id );
break;
default:
i_id = 0;
intf_ErrMsg( "dvd warning: unknown audio type %.2x",
vts.manager_inf.p_audio_attr[i-1].i_coding_mode );
}
}
}
#undef audio_status
#define spu_status \
vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_spu_status[i-1]
/* Sub Picture ES */
for( i = 1 ; i <= vts.manager_inf.i_spu_nb; i++ )
{
IfoPrintSpu( p_dvd, i );
if( spu_status.i_available )
{
i_spu_nb++;
/* there are several streams for one spu */
if( vts.manager_inf.video_attr.i_ratio )
{
/* 16:9 */
switch( vts.manager_inf.video_attr.i_perm_displ )
{
case 1:
i_id = ( ( 0x20 + spu_status.i_position_pan ) << 8 )
| 0xbd;
break;
case 2:
i_id = ( ( 0x20 + spu_status.i_position_letter ) << 8 )
| 0xbd;
break;
default:
i_id = ( ( 0x20 + spu_status.i_position_wide ) << 8 )
| 0xbd;
break;
}
}
else
{
/* 4:3 */
i_id = ( ( 0x20 + spu_status.i_position_43 ) << 8 )
| 0xbd;
}
p_es = input_AddES( p_input,
p_input->stream.pp_programs[0], i_id, 0 );
p_es->i_stream_id = 0xbd;
p_es->i_type = DVD_SPU_ES;
p_es->i_cat = SPU_ES;
strcpy( p_es->psz_desc, DecodeLanguage( hton16(
vts.manager_inf.p_spu_attr[i-1].i_lang_code ) ) );
}
}
#undef spu_status
if( p_main->b_audio )
{
/* For audio: first one if none or a not existing one specified */
i_audio = main_GetIntVariable( INPUT_CHANNEL_VAR, 1 );
if( i_audio < 0 || i_audio > i_audio_nb )
{
main_PutIntVariable( INPUT_CHANNEL_VAR, 1 );
i_audio = 1;
}
if( i_audio > 0 && i_audio_nb > 0 )
{
if( main_GetIntVariable( AOUT_SPDIF_VAR, 0 ) ||
( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) ==
REQUESTED_AC3 ) )
{
int i_ac3 = i_audio;
while( ( p_input->stream.pp_es[i_ac3]->i_type !=
AC3_AUDIO_ES ) && ( i_ac3 <=
vts.manager_inf.i_audio_nb ) )
{
i_ac3++;
}
if( p_input->stream.pp_es[i_ac3]->i_type == AC3_AUDIO_ES )
{
input_SelectES( p_input,
p_input->stream.pp_es[i_ac3] );
}
}
else
{
input_SelectES( p_input,
p_input->stream.pp_es[i_audio] );
}
}
}
if( p_main->b_video )
{
/* for spu, default is none */
i_spu = main_GetIntVariable( INPUT_SUBTITLE_VAR, 0 );
if( i_spu < 0 || i_spu > i_spu_nb )
{
main_PutIntVariable( INPUT_SUBTITLE_VAR, 0 );
i_spu = 0;
}
if( i_spu > 0 && i_spu_nb > 0 )
{
i_spu += vts.manager_inf.i_audio_nb;
input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
}
}
} /* i_title >= 0 */
else
{
p_area = p_input->stream.p_selected_area;
}
#undef vts
#undef vmg
/*
* Chapter selection
*/
if( p_area->i_part != p_dvd->i_chapter )
{
if( ( p_area->i_part > 0 ) &&
( p_area->i_part <= p_area->i_part_nb ))
{
if( DVDChapterSelect( p_dvd, p_area->i_part ) < 0 )
{
intf_ErrMsg( "dvd error: can't set chapter in area" );
p_input->b_error = 1;
return -1;
}
p_input->stream.p_selected_area->i_tell =
LB2OFF( p_dvd->i_start ) - p_area->i_start;
p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
intf_WarnMsg( 4, "dvd info: chapter %d start at: %lld",
p_area->i_part, p_area->i_tell );
}
else
{
p_area->i_part = 1;
p_dvd->i_chapter = 1;
}
}
#define title \
p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
if( p_area->i_angle != p_dvd->i_angle )
{
if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
{
if( ( p_area->i_angle - p_dvd->i_angle ) < 0 )
{
p_dvd->i_cell = 0;
}
p_dvd->i_prg_cell += ( p_area->i_angle - p_dvd->i_angle );
p_dvd->i_angle = p_area->i_angle;
DVDFindSector( p_dvd );
p_dvd->i_cell += p_dvd->i_angle_cell;
}
else
{
p_dvd->i_angle = p_area->i_angle;
}
intf_WarnMsg( 3, "dvd info: angle %d selected", p_area->i_angle );
}
/* warn interface that something has changed */
p_input->stream.b_seekable = 1;
p_input->stream.b_changed = 1;
return 0;
}
/*****************************************************************************
* DVDRead: reads data packets into the netlist.
*****************************************************************************
* Returns -1 in case of error, 0 if everything went well, and 1 in case of
* EOF.
*****************************************************************************/
static int DVDRead( input_thread_t * p_input,
data_packet_t ** pp_packets )
{
thread_dvd_data_t * p_dvd;
dvd_netlist_t * p_netlist;
struct iovec * p_vec;
struct data_packet_s * pp_data[DVD_DATA_READ_ONCE];
u8 * pi_cur;
int i_block_once;
int i_packet_size;
int i_iovec;
int i_packet;
int i_pos;
int i_read_blocks;
int i_sector;
boolean_t b_eof;
boolean_t b_eot;
boolean_t b_eoc;
p_dvd = (thread_dvd_data_t *)p_input->p_plugin_data;
p_netlist = (dvd_netlist_t *)p_input->p_method_data;
b_eoc = 0;
i_sector = p_dvd->i_title_start + p_dvd->i_sector;
i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
/* Get the position of the next cell if we're at cell end */
if( i_block_once <= 0 )
{
int i_angle;
p_dvd->i_cell++;
p_dvd->i_angle_cell++;
/* Find cell index in adress map */
if( DVDFindSector( p_dvd ) < 0 )
{
pp_packets[0] = NULL;
intf_ErrMsg( "dvd error: can't find next cell" );
return 1;
}
/* Position the fd pointer on the right address */
if( ( i_sector = dvdcss_seek( p_dvd->dvdhandle,
p_dvd->i_title_start + p_dvd->i_sector,
DVDCSS_SEEK_MPEG ) ) < 0 )
{
intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
return -1;
}
/* update chapter : it will be easier when we have navigation
* ES support */
if( p_dvd->i_chapter < ( p_dvd->i_chapter_nb - 1 ) )
{
if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
{
i_angle = p_dvd->i_angle - 1;
}
else
{
i_angle = 0;
}
if( title.chapter_map.pi_start_cell[p_dvd->i_chapter] <=
( p_dvd->i_prg_cell - i_angle + 1 ) )
{
p_dvd->i_chapter++;
b_eoc = 1;
}
}
i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
}
/* The number of blocks read is the max between the requested
* value and the leaving block in the cell */
if( i_block_once > p_dvd->i_block_once )
{
i_block_once = p_dvd->i_block_once;
}
/*
intf_WarnMsg( 2, "Sector: 0x%x Read: %d Chapter: %d", p_dvd->i_sector, i_block_once, p_dvd->i_chapter );
*/
p_netlist->i_read_once = i_block_once;
/* Get an iovec pointer */
if( ( p_vec = DVDGetiovec( p_netlist ) ) == NULL )
{
intf_ErrMsg( "dvd error: can't get iovec" );
return -1;
}
/* Reads from DVD */
i_read_blocks = dvdcss_readv( p_dvd->dvdhandle, p_vec,
i_block_once, DVDCSS_READ_DECRYPT );
/* Update netlist indexes: we don't do it in DVDGetiovec since we
* need know the real number of blocks read */
DVDMviovec( p_netlist, i_read_blocks, pp_data );
/* Update global position */
p_dvd->i_sector += i_read_blocks;
i_packet = 0;
/* Read headers to compute payload length */
for( i_iovec = 0 ; i_iovec < i_read_blocks ; i_iovec++ )
{
i_pos = 0;
while( i_pos < p_netlist->i_buffer_size )
{
pi_cur = (u8*)p_vec[i_iovec].iov_base + i_pos;
/*default header */
if( U32_AT( pi_cur ) != 0x1BA )
{
/* That's the case for all packets, except pack header. */
i_packet_size = U16_AT( pi_cur + 4 );
pp_packets[i_packet] = DVDNewPtr( p_netlist );
}
else
{
/* MPEG-2 Pack header. */
i_packet_size = 8;
pp_packets[i_packet] = pp_data[i_iovec];
}
(*pp_data[i_iovec]->pi_refcount)++;
pp_packets[i_packet]->pi_refcount = pp_data[i_iovec]->pi_refcount;
pp_packets[i_packet]->p_buffer = pp_data[i_iovec]->p_buffer;
pp_packets[i_packet]->p_payload_start =
pp_packets[i_packet]->p_buffer + i_pos;
pp_packets[i_packet]->p_payload_end =
pp_packets[i_packet]->p_payload_start + i_packet_size + 6;
pp_packets[i_packet]->p_next = NULL;
pp_packets[i_packet]->b_discard_payload = 0;
i_packet++;
i_pos += i_packet_size + 6;
}
}
pp_packets[i_packet] = NULL;
vlc_mutex_lock( &p_input->stream.stream_lock );
p_input->stream.p_selected_area->i_tell =
LB2OFF( i_sector + i_read_blocks ) -
p_input->stream.p_selected_area->i_start;
if( b_eoc )
{
/* We modify i_part only at end of chapter not to erase
* some modification from the interface */
p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
}
b_eot = !( p_input->stream.p_selected_area->i_tell
< p_input->stream.p_selected_area->i_size );
b_eof = b_eot && ( ( p_dvd->i_title + 1 ) >= p_input->stream.i_area_nb );
if( b_eof )
{
vlc_mutex_unlock( &p_input->stream.stream_lock );
return 1;
}
if( b_eot )
{
intf_WarnMsg( 4, "dvd info: new title" );
p_dvd->i_title++;
DVDSetArea( p_input, p_input->stream.pp_areas[p_dvd->i_title] );
vlc_mutex_unlock( &p_input->stream.stream_lock );
return 0;
}
vlc_mutex_unlock( &p_input->stream.stream_lock );
if( i_read_blocks == i_block_once )
{
return 0;
}
return -1;
}
/*****************************************************************************
* DVDRewind : reads a stream backward
*****************************************************************************/
static int DVDRewind( input_thread_t * p_input )
{
return( -1 );
}
/*****************************************************************************
* DVDSeek : Goes to a given position on the stream.
*****************************************************************************
* This one is used by the input and translate chronological position from
* input to logical position on the device.
* The lock should be taken before calling this function.
*****************************************************************************/
static void DVDSeek( input_thread_t * p_input, off_t i_off )
{
thread_dvd_data_t * p_dvd;
int i_block;
int i_prg_cell;
int i_cell;
int i_chapter;
int i_angle;
p_dvd = ( thread_dvd_data_t * )p_input->p_plugin_data;
/* we have to take care of offset of beginning of title */
p_dvd->i_sector = OFF2LB(i_off + p_input->stream.p_selected_area->i_start)
- p_dvd->i_title_start;
i_prg_cell = 0;
i_chapter = 0;
/* parse vobu address map to find program cell */
while( title.p_cell_play[i_prg_cell].i_end_sector < p_dvd->i_sector )
{
i_prg_cell++;
}
p_dvd->i_prg_cell = i_prg_cell;
if( DVDChooseAngle( p_dvd ) < 0 )
{
p_input->b_error = 1;
return;
}
p_dvd->i_cell = 0;
/* Find first title cell which is inside program cell */
if( DVDFindCell( p_dvd ) < 0 )
{
/* no following cell : we're at eof */
intf_ErrMsg( "dvd error: cell seeking failed" );
p_input->b_error = 1;
return;
}
i_cell = p_dvd->i_cell;
#define cell p_dvd->p_ifo->vts.cell_inf.p_cell_map[i_cell]
/* parse cell address map to find title cell containing sector */
while( cell.i_end_sector < p_dvd->i_sector )
{
i_cell++;
}
p_dvd->i_cell = i_cell;
/* if we're inside a multi-angle zone, we have to choose i_sector
* in the current angle ; we can't do it all the time since cells
* can be very wide out of such zones */
if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
{
p_dvd->i_sector = MAX(
cell.i_start_sector,
title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
}
p_dvd->i_end_sector = MIN(
cell.i_end_sector,
title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
#undef cell
/* update chapter */
if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
{
i_angle = p_dvd->i_angle - 1;
}
else
{
i_angle = 0;
}
if( p_dvd->i_chapter_nb > 1 )
{
while( ( title.chapter_map.pi_start_cell[i_chapter] <=
( p_dvd->i_prg_cell - i_angle + 1 ) ) &&
( i_chapter < ( p_dvd->i_chapter_nb - 1 ) ) )
{
i_chapter++;
}
}
else
{
i_chapter = 1;
}
p_dvd->i_chapter = i_chapter;
p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
if( ( i_block = dvdcss_seek( p_dvd->dvdhandle,
p_dvd->i_title_start + p_dvd->i_sector,
DVDCSS_SEEK_MPEG ) ) < 0 )
{
intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
p_input->b_error = 1;
return;
}
p_input->stream.p_selected_area->i_tell =
LB2OFF ( i_block ) - p_input->stream.p_selected_area->i_start;
intf_WarnMsg( 7, "Program Cell: %d Cell: %d Chapter: %d",
p_dvd->i_prg_cell, p_dvd->i_cell, p_dvd->i_chapter );
return;
}
#define cell p_dvd->p_ifo->vts.cell_inf
/*****************************************************************************
* DVDFindCell: adjust the title cell index with the program cell
*****************************************************************************/
static int DVDFindCell( thread_dvd_data_t * p_dvd )
{
int i_cell;
int i_index;
i_cell = p_dvd->i_cell;
i_index = p_dvd->i_prg_cell;
if( i_cell >= cell.i_cell_nb )
{
return -1;
}
while( ( ( title.p_cell_pos[i_index].i_vob_id !=
cell.p_cell_map[i_cell].i_vob_id ) ||
( title.p_cell_pos[i_index].i_cell_id !=
cell.p_cell_map[i_cell].i_cell_id ) ) &&
( i_cell < cell.i_cell_nb - 1 ) )
{
i_cell++;
}
/*
intf_WarnMsg( 12, "FindCell: i_cell %d i_index %d found %d nb %d",
p_dvd->i_cell,
p_dvd->i_prg_cell,
i_cell,
cell.i_cell_nb );
*/
p_dvd->i_cell = i_cell;
return 0;
}
#undef cell
/*****************************************************************************
* DVDFindSector: find cell index in adress map from index in
* information table program map and give corresponding sectors.
*****************************************************************************/
static int DVDFindSector( thread_dvd_data_t * p_dvd )
{
if( p_dvd->i_sector > title.p_cell_play[p_dvd->i_prg_cell].i_end_sector )
{
p_dvd->i_prg_cell++;
if( DVDChooseAngle( p_dvd ) < 0 )
{
return -1;
}
}
if( DVDFindCell( p_dvd ) < 0 )
{
intf_ErrMsg( "dvd error: can't find sector" );
return -1;
}
/* Find start and end sectors of new cell */
#if 1
p_dvd->i_sector = MAX(
p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
p_dvd->i_end_sector = MIN(
p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
#else
p_dvd->i_sector = title.p_cell_play[p_dvd->i_prg_cell].i_start_sector;
p_dvd->i_end_sector = title.p_cell_play[p_dvd->i_prg_cell].i_end_sector;
#endif
/*
intf_WarnMsg( 12, "cell: %d sector1: 0x%x end1: 0x%x\n"
"index: %d sector2: 0x%x end2: 0x%x\n"
"category: 0x%x ilvu end: 0x%x vobu start 0x%x",
p_dvd->i_cell,
p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
p_dvd->i_prg_cell,
title.p_cell_play[p_dvd->i_prg_cell].i_start_sector,
title.p_cell_play[p_dvd->i_prg_cell].i_end_sector,
title.p_cell_play[p_dvd->i_prg_cell].i_category,
title.p_cell_play[p_dvd->i_prg_cell].i_first_ilvu_vobu_esector,
title.p_cell_play[p_dvd->i_prg_cell].i_last_vobu_start_sector );
*/
return 0;
}
/*****************************************************************************
* DVDChapterSelect: find the cell corresponding to requested chapter
*****************************************************************************/
static int DVDChapterSelect( thread_dvd_data_t * p_dvd, int i_chapter )
{
/* Find cell index in Program chain for current chapter */
p_dvd->i_prg_cell = title.chapter_map.pi_start_cell[i_chapter-1] - 1;
p_dvd->i_cell = 0;
p_dvd->i_sector = 0;
DVDChooseAngle( p_dvd );
/* Search for cell_index in cell adress_table and initialize
* start sector */
if( DVDFindSector( p_dvd ) < 0 )
{
intf_ErrMsg( "dvd error: can't select chapter" );
return -1;
}
/* start is : beginning of vts vobs + offset to vob x */
p_dvd->i_start = p_dvd->i_title_start + p_dvd->i_sector;
/* Position the fd pointer on the right address */
if( ( p_dvd->i_start = dvdcss_seek( p_dvd->dvdhandle,
p_dvd->i_start,
DVDCSS_SEEK_MPEG ) ) < 0 )
{
intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
return -1;
}
p_dvd->i_chapter = i_chapter;
return 0;
}
/*****************************************************************************
* DVDChooseAngle: select the cell corresponding to the selected angle
*****************************************************************************/
static int DVDChooseAngle( thread_dvd_data_t * p_dvd )
{
/* basic handling of angles */
switch( ( ( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
>> 12 ) )
{
/* we enter a muli-angle section */
case 0x5:
p_dvd->i_prg_cell += p_dvd->i_angle - 1;
p_dvd->i_angle_cell = 0;
break;
/* we exit a multi-angle section */
case 0x9:
case 0xd:
p_dvd->i_prg_cell += p_dvd->i_angle_nb - p_dvd->i_angle;
break;
}
return 0;
}
#undef title