ifo_read.c 67.4 KB
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/*
 * Copyright (C) 2000, 2001, 2002, 2003
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 *               Björn Englund <d4bjorn@dtek.chalmers.se>,
 *               Håkan Hjort <d95hjort@dtek.chalmers.se>
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 *
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 * This file is part of libdvdread.
 *
 * libdvdread is free software; you can redistribute it and/or modify
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 * 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.
 *
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 * libdvdread is distributed in the hope that it will be useful,
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 * 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.
 *
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 * You should have received a copy of the GNU General Public License along
 * with libdvdread; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <string.h>

#include "bswap.h"
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#include "dvdread/ifo_types.h"
#include "dvdread/ifo_read.h"
#include "dvdread/dvd_reader.h"
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#include "dvdread_internal.h"
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#include "dvdread/bitreader.h"
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#ifndef DVD_BLOCK_LEN
#define DVD_BLOCK_LEN 2048
#endif

#ifndef NDEBUG
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#define CHECK_ZERO0(arg)                                                \
  if(arg != 0) {                                                        \
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    fprintf(stderr, "*** Zero check failed in %s:%i\n    for %s = 0x%x\n", \
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            __FILE__, __LINE__, # arg, arg);                            \
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  }
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#define CHECK_ZERO(arg)                                                 \
  if(memcmp(my_friendly_zeros, &arg, sizeof(arg))) {                    \
    unsigned int i_CZ;                                                  \
    fprintf(stderr, "*** Zero check failed in %s:%i\n    for %s = 0x",  \
            __FILE__, __LINE__, # arg );                                \
    for(i_CZ = 0; i_CZ < sizeof(arg); i_CZ++)                           \
      fprintf(stderr, "%02x", *((uint8_t *)&arg + i_CZ));               \
    fprintf(stderr, "\n");                                              \
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  }
static const uint8_t my_friendly_zeros[2048];
#else
#define CHECK_ZERO0(arg) (void)(arg)
#define CHECK_ZERO(arg) (void)(arg)
#endif


/* Prototypes for internal functions */
static int ifoRead_VMG(ifo_handle_t *ifofile);
static int ifoRead_VTS(ifo_handle_t *ifofile);
static int ifoRead_PGC(ifo_handle_t *ifofile, pgc_t *pgc, unsigned int offset);
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static int ifoRead_PGC_COMMAND_TBL(ifo_handle_t *ifofile,
                                   pgc_command_tbl_t *cmd_tbl,
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                                   unsigned int offset);
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static int ifoRead_PGC_PROGRAM_MAP(ifo_handle_t *ifofile,
                                   pgc_program_map_t *program_map,
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                                   unsigned int nr, unsigned int offset);
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static int ifoRead_CELL_PLAYBACK_TBL(ifo_handle_t *ifofile,
                                     cell_playback_t *cell_playback,
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                                     unsigned int nr, unsigned int offset);
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static int ifoRead_CELL_POSITION_TBL(ifo_handle_t *ifofile,
                                     cell_position_t *cell_position,
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                                     unsigned int nr, unsigned int offset);
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static int ifoRead_VTS_ATTRIBUTES(ifo_handle_t *ifofile,
                                  vts_attributes_t *vts_attributes,
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                                  unsigned int offset);
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static int ifoRead_C_ADT_internal(ifo_handle_t *ifofile, c_adt_t *c_adt,
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                                  unsigned int sector);
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static int ifoRead_VOBU_ADMAP_internal(ifo_handle_t *ifofile,
                                       vobu_admap_t *vobu_admap,
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                                       unsigned int sector);
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static int ifoRead_PGCIT_internal(ifo_handle_t *ifofile, pgcit_t *pgcit,
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                                  unsigned int offset);

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static void ifoFree_PGC(pgc_t **pgc);
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static void ifoFree_PGC_COMMAND_TBL(pgc_command_tbl_t *cmd_tbl);
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static void ifoFree_PGCIT_internal(pgcit_t **pgcit);
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static inline int DVDFileSeekForce_( dvd_file_t *dvd_file, uint32_t offset, int force_size ) {
  return (DVDFileSeekForce(dvd_file, (int)offset, force_size) == (int)offset);
}

static inline int DVDFileSeek_( dvd_file_t *dvd_file, uint32_t offset ) {
  return (DVDFileSeek(dvd_file, (int)offset) == (int)offset);
}

static void read_video_attr(video_attr_t *va) {
  getbits_state_t state;
  uint8_t buf[sizeof(video_attr_t)];

  memcpy(buf, va, sizeof(video_attr_t));
  if (!dvdread_getbits_init(&state, buf)) abort();
  va->mpeg_version = dvdread_getbits(&state, 2);
  va->video_format = dvdread_getbits(&state, 2);
  va->display_aspect_ratio = dvdread_getbits(&state, 2);
  va->permitted_df = dvdread_getbits(&state, 2);
  va->line21_cc_1 = dvdread_getbits(&state, 1);
  va->line21_cc_2 = dvdread_getbits(&state, 1);
  va->unknown1 = dvdread_getbits(&state, 1);
  va->bit_rate = dvdread_getbits(&state, 1);
  va->picture_size = dvdread_getbits(&state, 2);
  va->letterboxed = dvdread_getbits(&state, 1);
  va->film_mode = dvdread_getbits(&state, 1);
}

static void read_audio_attr(audio_attr_t *aa) {
  getbits_state_t state;
  uint8_t buf[sizeof(audio_attr_t)];
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  memcpy(buf, aa, sizeof(audio_attr_t));
  if (!dvdread_getbits_init(&state, buf)) abort();
  aa->audio_format = dvdread_getbits(&state, 3);
  aa->multichannel_extension = dvdread_getbits(&state, 1);
  aa->lang_type = dvdread_getbits(&state, 2);
  aa->application_mode = dvdread_getbits(&state, 2);
  aa->quantization = dvdread_getbits(&state, 2);
  aa->sample_frequency = dvdread_getbits(&state, 2);
  aa->unknown1 = dvdread_getbits(&state, 1);
  aa->channels = dvdread_getbits(&state, 3);
  aa->lang_code = dvdread_getbits(&state, 16);
  aa->lang_extension = dvdread_getbits(&state, 8);
  aa->code_extension = dvdread_getbits(&state, 8);
  aa->unknown3 = dvdread_getbits(&state, 8);
  aa->app_info.karaoke.unknown4 = dvdread_getbits(&state, 1);
  aa->app_info.karaoke.channel_assignment = dvdread_getbits(&state, 3);
  aa->app_info.karaoke.version = dvdread_getbits(&state, 2);
  aa->app_info.karaoke.mc_intro = dvdread_getbits(&state, 1);
  aa->app_info.karaoke.mode = dvdread_getbits(&state, 1);
}

static void read_multichannel_ext(multichannel_ext_t *me) {
  getbits_state_t state;
  uint8_t buf[sizeof(multichannel_ext_t)];
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  memcpy(buf, me, sizeof(multichannel_ext_t));
  if (!dvdread_getbits_init(&state, buf)) abort();
  me->zero1 = dvdread_getbits(&state, 7);
  me->ach0_gme = dvdread_getbits(&state, 1);
  me->zero2 = dvdread_getbits(&state, 7);
  me->ach1_gme = dvdread_getbits(&state, 1);
  me->zero3 = dvdread_getbits(&state, 4);
  me->ach2_gv1e = dvdread_getbits(&state, 1);
  me->ach2_gv2e = dvdread_getbits(&state, 1);
  me->ach2_gm1e = dvdread_getbits(&state, 1);
  me->ach2_gm2e = dvdread_getbits(&state, 1);
  me->zero4 = dvdread_getbits(&state, 4);
  me->ach3_gv1e = dvdread_getbits(&state, 1);
  me->ach3_gv2e = dvdread_getbits(&state, 1);
  me->ach3_gmAe = dvdread_getbits(&state, 1);
  me->ach3_se2e = dvdread_getbits(&state, 1);
  me->zero5 = dvdread_getbits(&state, 4);
  me->ach4_gv1e = dvdread_getbits(&state, 1);
  me->ach4_gv2e = dvdread_getbits(&state, 1);
  me->ach4_gmBe = dvdread_getbits(&state, 1);
  me->ach4_seBe = dvdread_getbits(&state, 1);
}

static void read_subp_attr(subp_attr_t *sa) {
  getbits_state_t state;
  uint8_t buf[sizeof(subp_attr_t)];
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  memcpy(buf, sa, sizeof(subp_attr_t));
  if (!dvdread_getbits_init(&state, buf)) abort();
  sa->code_mode = dvdread_getbits(&state, 3);
  sa->zero1 = dvdread_getbits(&state, 3);
  sa->type = dvdread_getbits(&state, 2);
  sa->zero2 = dvdread_getbits(&state, 8);
  sa->lang_code = dvdread_getbits(&state, 16);
  sa->lang_extension = dvdread_getbits(&state, 8);
  sa->code_extension = dvdread_getbits(&state, 8);
}

static void read_user_ops(user_ops_t *uo) {
  getbits_state_t state;
  uint8_t buf[sizeof(user_ops_t)];
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  memcpy(buf, uo, sizeof(user_ops_t));
  if (!dvdread_getbits_init(&state, buf)) abort();
  uo->zero                           = dvdread_getbits(&state, 7);
  uo->video_pres_mode_change         = dvdread_getbits(&state, 1);
  uo->karaoke_audio_pres_mode_change = dvdread_getbits(&state, 1);
  uo->angle_change                   = dvdread_getbits(&state, 1);
  uo->subpic_stream_change           = dvdread_getbits(&state, 1);
  uo->audio_stream_change            = dvdread_getbits(&state, 1);
  uo->pause_on                       = dvdread_getbits(&state, 1);
  uo->still_off                      = dvdread_getbits(&state, 1);
  uo->button_select_or_activate      = dvdread_getbits(&state, 1);
  uo->resume                         = dvdread_getbits(&state, 1);
  uo->chapter_menu_call              = dvdread_getbits(&state, 1);
  uo->angle_menu_call                = dvdread_getbits(&state, 1);
  uo->audio_menu_call                = dvdread_getbits(&state, 1);
  uo->subpic_menu_call               = dvdread_getbits(&state, 1);
  uo->root_menu_call                 = dvdread_getbits(&state, 1);
  uo->title_menu_call                = dvdread_getbits(&state, 1);
  uo->backward_scan                  = dvdread_getbits(&state, 1);
  uo->forward_scan                   = dvdread_getbits(&state, 1);
  uo->next_pg_search                 = dvdread_getbits(&state, 1);
  uo->prev_or_top_pg_search          = dvdread_getbits(&state, 1);
  uo->time_or_chapter_search         = dvdread_getbits(&state, 1);
  uo->go_up                          = dvdread_getbits(&state, 1);
  uo->stop                           = dvdread_getbits(&state, 1);
  uo->title_play                     = dvdread_getbits(&state, 1);
  uo->chapter_search_or_play         = dvdread_getbits(&state, 1);
  uo->title_or_time_play             = dvdread_getbits(&state, 1);
}

static void read_pgci_srp(pgci_srp_t *ps) {
  getbits_state_t state;
  uint8_t buf[sizeof(pgci_srp_t)];
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  memcpy(buf, ps, sizeof(pgci_srp_t));
  if (!dvdread_getbits_init(&state, buf)) abort();
  ps->entry_id                       = dvdread_getbits(&state, 8);
  ps->block_mode                     = dvdread_getbits(&state, 2);
  ps->block_type                     = dvdread_getbits(&state, 2);
  ps->unknown1                       = dvdread_getbits(&state, 4);
  ps->ptl_id_mask                    = dvdread_getbits(&state, 16);
  ps->pgc_start_byte                 = dvdread_getbits(&state, 32);
}

static void read_cell_playback(cell_playback_t *cp) {
  getbits_state_t state;
  uint8_t buf[sizeof(cell_playback_t)];
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  memcpy(buf, cp, sizeof(cell_playback_t));
  if (!dvdread_getbits_init(&state, buf)) abort();
  cp->block_mode                      = dvdread_getbits(&state, 2);
  cp->block_type                      = dvdread_getbits(&state, 2);
  cp->seamless_play                   = dvdread_getbits(&state, 1);
  cp->interleaved                     = dvdread_getbits(&state, 1);
  cp->stc_discontinuity               = dvdread_getbits(&state, 1);
  cp->seamless_angle                  = dvdread_getbits(&state, 1);
  cp->playback_mode                   = dvdread_getbits(&state, 1);
  cp->restricted                      = dvdread_getbits(&state, 1);
  cp->unknown2                        = dvdread_getbits(&state, 6);
  cp->still_time                      = dvdread_getbits(&state, 8);
  cp->cell_cmd_nr                     = dvdread_getbits(&state, 8);
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  cp->playback_time.hour              = dvdread_getbits(&state, 8);
  cp->playback_time.minute            = dvdread_getbits(&state, 8);
  cp->playback_time.second            = dvdread_getbits(&state, 8);
  cp->playback_time.frame_u           = dvdread_getbits(&state, 8);
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  cp->first_sector                    = dvdread_getbits(&state, 32);
  cp->first_ilvu_end_sector           = dvdread_getbits(&state, 32);
  cp->last_vobu_start_sector          = dvdread_getbits(&state, 32);
  cp->last_sector                     = dvdread_getbits(&state, 32);
}

static void read_playback_type(playback_type_t *pt) {
  getbits_state_t state;
  uint8_t buf[sizeof(playback_type_t)];
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  memcpy(buf, pt, sizeof(playback_type_t));
  if (!dvdread_getbits_init(&state, buf)) abort();
  pt->zero_1                          = dvdread_getbits(&state, 1);
  pt->multi_or_random_pgc_title       = dvdread_getbits(&state, 1);
  pt->jlc_exists_in_cell_cmd          = dvdread_getbits(&state, 1);
  pt->jlc_exists_in_prepost_cmd       = dvdread_getbits(&state, 1);
  pt->jlc_exists_in_button_cmd        = dvdread_getbits(&state, 1);
  pt->jlc_exists_in_tt_dom            = dvdread_getbits(&state, 1);
  pt->chapter_search_or_play          = dvdread_getbits(&state, 1);
  pt->title_or_time_play              = dvdread_getbits(&state, 1);
}

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static void free_ptl_mait(ptl_mait_t* ptl_mait, int num_entries) {
  int i;
  for (i = 0; i < num_entries; i++)
    free(ptl_mait->countries[i].pf_ptl_mai);

  free(ptl_mait->countries);
  free(ptl_mait);
}

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ifo_handle_t *ifoOpen(dvd_reader_t *dvd, int title) {
  ifo_handle_t *ifofile;
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  int bup_file_opened = 0;
  char ifo_filename[13];
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  ifofile = malloc(sizeof(ifo_handle_t));
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  if(!ifofile)
    return NULL;

  memset(ifofile, 0, sizeof(ifo_handle_t));

  ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_FILE);
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  if(!ifofile->file) { /* Failed to open IFO, try to open BUP */
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    ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_BACKUP_FILE);
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    bup_file_opened = 1;
  }

  if (title)
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    snprintf(ifo_filename, 13, "VTS_%02d_0.%s", title, bup_file_opened ? "BUP" : "IFO");
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  else
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    snprintf(ifo_filename, 13, "VIDEO_TS.%s", bup_file_opened ? "BUP" : "IFO");
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  if(!ifofile->file) {
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    fprintf(stderr, "libdvdread: Can't open file %s.\n", ifo_filename);
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    free(ifofile);
    return NULL;
  }

  /* First check if this is a VMGI file. */
  if(ifoRead_VMG(ifofile)) {

    /* These are both mandatory. */
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    if(!ifoRead_FP_PGC(ifofile) || !ifoRead_TT_SRPT(ifofile))
      goto ifoOpen_try_bup;
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    ifoRead_PGCI_UT(ifofile);
    ifoRead_PTL_MAIT(ifofile);

    /* This is also mandatory. */
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    if(!ifoRead_VTS_ATRT(ifofile))
      goto ifoOpen_try_bup;
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    ifoRead_TXTDT_MGI(ifofile);
    ifoRead_C_ADT(ifofile);
    ifoRead_VOBU_ADMAP(ifofile);

    return ifofile;
  }

  if(ifoRead_VTS(ifofile)) {

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    if(!ifoRead_VTS_PTT_SRPT(ifofile) || !ifoRead_PGCIT(ifofile))
      goto ifoOpen_try_bup;
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    ifoRead_PGCI_UT(ifofile);
    ifoRead_VTS_TMAPT(ifofile);
    ifoRead_C_ADT(ifofile);
    ifoRead_VOBU_ADMAP(ifofile);

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    if(!ifoRead_TITLE_C_ADT(ifofile) || !ifoRead_TITLE_VOBU_ADMAP(ifofile))
      goto ifoOpen_try_bup;
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    return ifofile;
  }

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ifoOpen_try_bup:
  if (bup_file_opened)
    goto ifoOpen_fail;

  /* Try BUP instead */
  ifoClose(ifofile);

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  ifofile = malloc(sizeof(ifo_handle_t));
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  if(!ifofile)
    return NULL;

  memset(ifofile, 0, sizeof(ifo_handle_t));
  ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_BACKUP_FILE);

  if (title)
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    snprintf(ifo_filename, 13, "VTS_%02d_0.BUP", title);
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  else
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    strncpy(ifo_filename, "VIDEO_TS.BUP", 13);
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  if (!ifofile->file) {
    fprintf(stderr, "libdvdread: Can't open file %s.\n", ifo_filename);
    free(ifofile);
    return NULL;
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  }
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  bup_file_opened = 1;

  /* First check if this is a VMGI file. */
  if(ifoRead_VMG(ifofile)) {

    /* These are both mandatory. */
    if(!ifoRead_FP_PGC(ifofile) || !ifoRead_TT_SRPT(ifofile))
      goto ifoOpen_fail;

    ifoRead_PGCI_UT(ifofile);
    ifoRead_PTL_MAIT(ifofile);

    /* This is also mandatory. */
    if(!ifoRead_VTS_ATRT(ifofile))
      goto ifoOpen_fail;

    ifoRead_TXTDT_MGI(ifofile);
    ifoRead_C_ADT(ifofile);
    ifoRead_VOBU_ADMAP(ifofile);

    return ifofile;
  }

  if(ifoRead_VTS(ifofile)) {

    if(!ifoRead_VTS_PTT_SRPT(ifofile) || !ifoRead_PGCIT(ifofile))
      goto ifoOpen_fail;

    ifoRead_PGCI_UT(ifofile);
    ifoRead_VTS_TMAPT(ifofile);
    ifoRead_C_ADT(ifofile);
    ifoRead_VOBU_ADMAP(ifofile);

    if(!ifoRead_TITLE_C_ADT(ifofile) || !ifoRead_TITLE_VOBU_ADMAP(ifofile))
      goto ifoOpen_fail;

    return ifofile;
  }

ifoOpen_fail:
  fprintf(stderr, "libdvdread: Invalid IFO for title %d (%s).\n", title, ifo_filename);
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  ifoClose(ifofile);
  return NULL;
}


ifo_handle_t *ifoOpenVMGI(dvd_reader_t *dvd) {
  ifo_handle_t *ifofile;

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  ifofile = malloc(sizeof(ifo_handle_t));
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  if(!ifofile)
    return NULL;

  memset(ifofile, 0, sizeof(ifo_handle_t));

  ifofile->file = DVDOpenFile(dvd, 0, DVD_READ_INFO_FILE);
  if(!ifofile->file) /* Should really catch any error and try to fallback */
    ifofile->file = DVDOpenFile(dvd, 0, DVD_READ_INFO_BACKUP_FILE);
  if(!ifofile->file) {
    fprintf(stderr, "libdvdread: Can't open file VIDEO_TS.IFO.\n");
    free(ifofile);
    return NULL;
  }

  if(ifoRead_VMG(ifofile))
    return ifofile;

  fprintf(stderr, "libdvdread,ifoOpenVMGI(): Invalid main menu IFO (VIDEO_TS.IFO).\n");
  ifoClose(ifofile);
  return NULL;
}


ifo_handle_t *ifoOpenVTSI(dvd_reader_t *dvd, int title) {
  ifo_handle_t *ifofile;
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  ifofile = malloc(sizeof(ifo_handle_t));
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  if(!ifofile)
    return NULL;

  memset(ifofile, 0, sizeof(ifo_handle_t));
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  if(title <= 0 || title > 99) {
    fprintf(stderr, "libdvdread: ifoOpenVTSI invalid title (%d).\n", title);
    free(ifofile);
    return NULL;
  }
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  ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_FILE);
  if(!ifofile->file) /* Should really catch any error and try to fallback */
    ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_BACKUP_FILE);
  if(!ifofile->file) {
    fprintf(stderr, "libdvdread: Can't open file VTS_%02d_0.IFO.\n", title);
    free(ifofile);
    return NULL;
  }

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  if(ifoRead_VTS(ifofile) && ifofile->vtsi_mat)
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    return ifofile;

  fprintf(stderr, "libdvdread: Invalid IFO for title %d (VTS_%02d_0.IFO).\n",
          title, title);
  ifoClose(ifofile);
  return NULL;
}


void ifoClose(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
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  ifoFree_VOBU_ADMAP(ifofile);
  ifoFree_TITLE_VOBU_ADMAP(ifofile);
  ifoFree_C_ADT(ifofile);
  ifoFree_TITLE_C_ADT(ifofile);
  ifoFree_TXTDT_MGI(ifofile);
  ifoFree_VTS_ATRT(ifofile);
  ifoFree_PTL_MAIT(ifofile);
  ifoFree_PGCI_UT(ifofile);
  ifoFree_TT_SRPT(ifofile);
  ifoFree_FP_PGC(ifofile);
  ifoFree_PGCIT(ifofile);
  ifoFree_VTS_PTT_SRPT(ifofile);
  ifoFree_VTS_TMAPT(ifofile);

  if(ifofile->vmgi_mat)
    free(ifofile->vmgi_mat);

  if(ifofile->vtsi_mat)
    free(ifofile->vtsi_mat);

  DVDCloseFile(ifofile->file);
  ifofile->file = 0;
  free(ifofile);
  ifofile = 0;
}


static int ifoRead_VMG(ifo_handle_t *ifofile) {
  vmgi_mat_t *vmgi_mat;

520
  vmgi_mat = calloc(1, sizeof(vmgi_mat_t));
521 522 523 524 525 526 527
  if(!vmgi_mat)
    return 0;

  ifofile->vmgi_mat = vmgi_mat;

  if(!DVDFileSeek_(ifofile->file, 0)) {
    free(ifofile->vmgi_mat);
528
    ifofile->vmgi_mat = NULL;
529 530 531 532 533
    return 0;
  }

  if(!DVDReadBytes(ifofile->file, vmgi_mat, sizeof(vmgi_mat_t))) {
    free(ifofile->vmgi_mat);
534
    ifofile->vmgi_mat = NULL;
535 536 537 538 539
    return 0;
  }

  if(strncmp("DVDVIDEO-VMG", vmgi_mat->vmg_identifier, 12) != 0) {
    free(ifofile->vmgi_mat);
540
    ifofile->vmgi_mat = NULL;
541 542
    return 0;
  }
543

544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567
  B2N_32(vmgi_mat->vmg_last_sector);
  B2N_32(vmgi_mat->vmgi_last_sector);
  B2N_32(vmgi_mat->vmg_category);
  B2N_16(vmgi_mat->vmg_nr_of_volumes);
  B2N_16(vmgi_mat->vmg_this_volume_nr);
  B2N_16(vmgi_mat->vmg_nr_of_title_sets);
  B2N_64(vmgi_mat->vmg_pos_code);
  B2N_32(vmgi_mat->vmgi_last_byte);
  B2N_32(vmgi_mat->first_play_pgc);
  B2N_32(vmgi_mat->vmgm_vobs);
  B2N_32(vmgi_mat->tt_srpt);
  B2N_32(vmgi_mat->vmgm_pgci_ut);
  B2N_32(vmgi_mat->ptl_mait);
  B2N_32(vmgi_mat->vts_atrt);
  B2N_32(vmgi_mat->txtdt_mgi);
  B2N_32(vmgi_mat->vmgm_c_adt);
  B2N_32(vmgi_mat->vmgm_vobu_admap);
  read_video_attr(&vmgi_mat->vmgm_video_attr);
  read_audio_attr(&vmgi_mat->vmgm_audio_attr);
  read_subp_attr(&vmgi_mat->vmgm_subp_attr);


  CHECK_ZERO(vmgi_mat->zero_1);
  CHECK_ZERO(vmgi_mat->zero_2);
568 569
  /* DVDs created by VDR-to-DVD device LG RC590M violate the following check with
   * vmgi_mat->zero_3 = 0x00000000010000000000000000000000000000. */
570 571 572 573 574 575 576
  CHECK_ZERO(vmgi_mat->zero_3);
  CHECK_ZERO(vmgi_mat->zero_4);
  CHECK_ZERO(vmgi_mat->zero_5);
  CHECK_ZERO(vmgi_mat->zero_6);
  CHECK_ZERO(vmgi_mat->zero_7);
  CHECK_ZERO(vmgi_mat->zero_8);
  CHECK_ZERO(vmgi_mat->zero_9);
577
  CHECK_ZERO(vmgi_mat->zero_10);
578 579 580 581 582 583 584 585 586 587
  CHECK_VALUE(vmgi_mat->vmg_last_sector != 0);
  CHECK_VALUE(vmgi_mat->vmgi_last_sector != 0);
  CHECK_VALUE(vmgi_mat->vmgi_last_sector * 2 <= vmgi_mat->vmg_last_sector);
  CHECK_VALUE(vmgi_mat->vmgi_last_sector * 2 <= vmgi_mat->vmg_last_sector);
  CHECK_VALUE(vmgi_mat->vmg_nr_of_volumes != 0);
  CHECK_VALUE(vmgi_mat->vmg_this_volume_nr != 0);
  CHECK_VALUE(vmgi_mat->vmg_this_volume_nr <= vmgi_mat->vmg_nr_of_volumes);
  CHECK_VALUE(vmgi_mat->disc_side == 1 || vmgi_mat->disc_side == 2);
  CHECK_VALUE(vmgi_mat->vmg_nr_of_title_sets != 0);
  CHECK_VALUE(vmgi_mat->vmgi_last_byte >= 341);
588
  CHECK_VALUE(vmgi_mat->vmgi_last_byte / DVD_BLOCK_LEN <=
589
              vmgi_mat->vmgi_last_sector);
590 591
  /* It seems that first_play_pgc is optional. */
  CHECK_VALUE(vmgi_mat->first_play_pgc < vmgi_mat->vmgi_last_byte);
592
  CHECK_VALUE(vmgi_mat->vmgm_vobs == 0 ||
593 594
              (vmgi_mat->vmgm_vobs > vmgi_mat->vmgi_last_sector &&
               vmgi_mat->vmgm_vobs < vmgi_mat->vmg_last_sector));
595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613
  CHECK_VALUE(vmgi_mat->tt_srpt <= vmgi_mat->vmgi_last_sector);
  CHECK_VALUE(vmgi_mat->vmgm_pgci_ut <= vmgi_mat->vmgi_last_sector);
  CHECK_VALUE(vmgi_mat->ptl_mait <= vmgi_mat->vmgi_last_sector);
  CHECK_VALUE(vmgi_mat->vts_atrt <= vmgi_mat->vmgi_last_sector);
  CHECK_VALUE(vmgi_mat->txtdt_mgi <= vmgi_mat->vmgi_last_sector);
  CHECK_VALUE(vmgi_mat->vmgm_c_adt <= vmgi_mat->vmgi_last_sector);
  CHECK_VALUE(vmgi_mat->vmgm_vobu_admap <= vmgi_mat->vmgi_last_sector);

  CHECK_VALUE(vmgi_mat->nr_of_vmgm_audio_streams <= 1);
  CHECK_VALUE(vmgi_mat->nr_of_vmgm_subp_streams <= 1);

  return 1;
}


static int ifoRead_VTS(ifo_handle_t *ifofile) {
  vtsi_mat_t *vtsi_mat;
  int i;

614
  vtsi_mat = calloc(1, sizeof(vtsi_mat_t));
615 616
  if(!vtsi_mat)
    return 0;
617

618 619 620 621
  ifofile->vtsi_mat = vtsi_mat;

  if(!DVDFileSeek_(ifofile->file, 0)) {
    free(ifofile->vtsi_mat);
622
    ifofile->vtsi_mat = NULL;
623 624 625 626 627
    return 0;
  }

  if(!(DVDReadBytes(ifofile->file, vtsi_mat, sizeof(vtsi_mat_t)))) {
    free(ifofile->vtsi_mat);
628
    ifofile->vtsi_mat = NULL;
629 630 631 632 633
    return 0;
  }

  if(strncmp("DVDVIDEO-VTS", vtsi_mat->vts_identifier, 12) != 0) {
    free(ifofile->vtsi_mat);
634
    ifofile->vtsi_mat = NULL;
635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
    return 0;
  }

  read_video_attr(&vtsi_mat->vtsm_video_attr);
  read_video_attr(&vtsi_mat->vts_video_attr);
  read_audio_attr(&vtsi_mat->vtsm_audio_attr);
  for(i=0; i<8; i++)
    read_audio_attr(&vtsi_mat->vts_audio_attr[i]);
  read_subp_attr(&vtsi_mat->vtsm_subp_attr);
  for(i=0; i<32; i++)
    read_subp_attr(&vtsi_mat->vts_subp_attr[i]);
  B2N_32(vtsi_mat->vts_last_sector);
  B2N_32(vtsi_mat->vtsi_last_sector);
  B2N_32(vtsi_mat->vts_category);
  B2N_32(vtsi_mat->vtsi_last_byte);
  B2N_32(vtsi_mat->vtsm_vobs);
  B2N_32(vtsi_mat->vtstt_vobs);
  B2N_32(vtsi_mat->vts_ptt_srpt);
  B2N_32(vtsi_mat->vts_pgcit);
  B2N_32(vtsi_mat->vtsm_pgci_ut);
  B2N_32(vtsi_mat->vts_tmapt);
  B2N_32(vtsi_mat->vtsm_c_adt);
  B2N_32(vtsi_mat->vtsm_vobu_admap);
  B2N_32(vtsi_mat->vts_c_adt);
  B2N_32(vtsi_mat->vts_vobu_admap);


  CHECK_ZERO(vtsi_mat->zero_1);
  CHECK_ZERO(vtsi_mat->zero_2);
  CHECK_ZERO(vtsi_mat->zero_3);
  CHECK_ZERO(vtsi_mat->zero_4);
  CHECK_ZERO(vtsi_mat->zero_5);
  CHECK_ZERO(vtsi_mat->zero_6);
  CHECK_ZERO(vtsi_mat->zero_7);
  CHECK_ZERO(vtsi_mat->zero_8);
  CHECK_ZERO(vtsi_mat->zero_9);
  CHECK_ZERO(vtsi_mat->zero_10);
  CHECK_ZERO(vtsi_mat->zero_11);
  CHECK_ZERO(vtsi_mat->zero_12);
  CHECK_ZERO(vtsi_mat->zero_13);
  CHECK_ZERO(vtsi_mat->zero_14);
  CHECK_ZERO(vtsi_mat->zero_15);
  CHECK_ZERO(vtsi_mat->zero_16);
  CHECK_ZERO(vtsi_mat->zero_17);
  CHECK_ZERO(vtsi_mat->zero_18);
  CHECK_ZERO(vtsi_mat->zero_19);
  CHECK_ZERO(vtsi_mat->zero_20);
  CHECK_ZERO(vtsi_mat->zero_21);
  CHECK_VALUE(vtsi_mat->vtsi_last_sector*2 <= vtsi_mat->vts_last_sector);
  CHECK_VALUE(vtsi_mat->vtsi_last_byte/DVD_BLOCK_LEN <= vtsi_mat->vtsi_last_sector);
685
  CHECK_VALUE(vtsi_mat->vtsm_vobs == 0 ||
686 687
              (vtsi_mat->vtsm_vobs > vtsi_mat->vtsi_last_sector &&
               vtsi_mat->vtsm_vobs < vtsi_mat->vts_last_sector));
688
  CHECK_VALUE(vtsi_mat->vtstt_vobs == 0 ||
689 690
              (vtsi_mat->vtstt_vobs > vtsi_mat->vtsi_last_sector &&
               vtsi_mat->vtstt_vobs < vtsi_mat->vts_last_sector));
691 692 693 694 695 696 697 698
  CHECK_VALUE(vtsi_mat->vts_ptt_srpt <= vtsi_mat->vtsi_last_sector);
  CHECK_VALUE(vtsi_mat->vts_pgcit <= vtsi_mat->vtsi_last_sector);
  CHECK_VALUE(vtsi_mat->vtsm_pgci_ut <= vtsi_mat->vtsi_last_sector);
  CHECK_VALUE(vtsi_mat->vts_tmapt <= vtsi_mat->vtsi_last_sector);
  CHECK_VALUE(vtsi_mat->vtsm_c_adt <= vtsi_mat->vtsi_last_sector);
  CHECK_VALUE(vtsi_mat->vtsm_vobu_admap <= vtsi_mat->vtsi_last_sector);
  CHECK_VALUE(vtsi_mat->vts_c_adt <= vtsi_mat->vtsi_last_sector);
  CHECK_VALUE(vtsi_mat->vts_vobu_admap <= vtsi_mat->vtsi_last_sector);
699

700 701 702 703 704 705 706 707 708
  CHECK_VALUE(vtsi_mat->nr_of_vtsm_audio_streams <= 1);
  CHECK_VALUE(vtsi_mat->nr_of_vtsm_subp_streams <= 1);

  CHECK_VALUE(vtsi_mat->nr_of_vts_audio_streams <= 8);
  for(i = vtsi_mat->nr_of_vts_audio_streams; i < 8; i++)
    CHECK_ZERO(vtsi_mat->vts_audio_attr[i]);

  CHECK_VALUE(vtsi_mat->nr_of_vts_subp_streams <= 32);
  for(i = vtsi_mat->nr_of_vts_subp_streams; i < 32; i++)
709 710
    CHECK_ZERO(vtsi_mat->vts_subp_attr[i]);

711 712 713 714 715 716 717 718 719
  for(i = 0; i < 8; i++) {
    read_multichannel_ext(&vtsi_mat->vts_mu_audio_attr[i]);
    CHECK_ZERO0(vtsi_mat->vts_mu_audio_attr[i].zero1);
    CHECK_ZERO0(vtsi_mat->vts_mu_audio_attr[i].zero2);
    CHECK_ZERO0(vtsi_mat->vts_mu_audio_attr[i].zero3);
    CHECK_ZERO0(vtsi_mat->vts_mu_audio_attr[i].zero4);
    CHECK_ZERO0(vtsi_mat->vts_mu_audio_attr[i].zero5);
    CHECK_ZERO(vtsi_mat->vts_mu_audio_attr[i].zero6);
  }
720

721 722 723 724
  return 1;
}


725 726
static int ifoRead_PGC_COMMAND_TBL(ifo_handle_t *ifofile,
                                   pgc_command_tbl_t *cmd_tbl,
727
                                   unsigned int offset) {
728

729
  memset(cmd_tbl, 0, sizeof(pgc_command_tbl_t));
730

731 732 733 734 735 736 737 738 739 740 741
  if(!DVDFileSeek_(ifofile->file, offset))
    return 0;

  if(!(DVDReadBytes(ifofile->file, cmd_tbl, PGC_COMMAND_TBL_SIZE)))
    return 0;

  B2N_16(cmd_tbl->nr_of_pre);
  B2N_16(cmd_tbl->nr_of_post);
  B2N_16(cmd_tbl->nr_of_cell);

  CHECK_VALUE(cmd_tbl->nr_of_pre + cmd_tbl->nr_of_post + cmd_tbl->nr_of_cell<= 255);
742

743 744
  if(cmd_tbl->nr_of_pre != 0) {
    unsigned int pre_cmds_size  = cmd_tbl->nr_of_pre * COMMAND_DATA_SIZE;
745
    cmd_tbl->pre_cmds = malloc(pre_cmds_size);
746 747 748 749 750 751 752 753
    if(!cmd_tbl->pre_cmds)
      return 0;

    if(!(DVDReadBytes(ifofile->file, cmd_tbl->pre_cmds, pre_cmds_size))) {
      free(cmd_tbl->pre_cmds);
      return 0;
    }
  }
754

755 756
  if(cmd_tbl->nr_of_post != 0) {
    unsigned int post_cmds_size = cmd_tbl->nr_of_post * COMMAND_DATA_SIZE;
757
    cmd_tbl->post_cmds = malloc(post_cmds_size);
758
    if(!cmd_tbl->post_cmds) {
759
      if(cmd_tbl->pre_cmds)
760
        free(cmd_tbl->pre_cmds);
761 762 763
      return 0;
    }
    if(!(DVDReadBytes(ifofile->file, cmd_tbl->post_cmds, post_cmds_size))) {
764
      if(cmd_tbl->pre_cmds)
765
        free(cmd_tbl->pre_cmds);
766 767 768 769 770 771 772
      free(cmd_tbl->post_cmds);
      return 0;
    }
  }

  if(cmd_tbl->nr_of_cell != 0) {
    unsigned int cell_cmds_size = cmd_tbl->nr_of_cell * COMMAND_DATA_SIZE;
773
    cmd_tbl->cell_cmds = malloc(cell_cmds_size);
774 775
    if(!cmd_tbl->cell_cmds) {
      if(cmd_tbl->pre_cmds)
776
        free(cmd_tbl->pre_cmds);
777
      if(cmd_tbl->post_cmds)
778
        free(cmd_tbl->post_cmds);
779 780 781
      return 0;
    }
    if(!(DVDReadBytes(ifofile->file, cmd_tbl->cell_cmds, cell_cmds_size))) {
782
      if(cmd_tbl->pre_cmds)
783
        free(cmd_tbl->pre_cmds);
784
      if(cmd_tbl->post_cmds)
785
        free(cmd_tbl->post_cmds);
786 787 788 789
      free(cmd_tbl->cell_cmds);
      return 0;
    }
  }
790 791

  /*
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809
   * Make a run over all the commands and see that we can interpret them all?
   */
  return 1;
}


static void ifoFree_PGC_COMMAND_TBL(pgc_command_tbl_t *cmd_tbl) {
  if(cmd_tbl) {
    if(cmd_tbl->nr_of_pre && cmd_tbl->pre_cmds)
      free(cmd_tbl->pre_cmds);
    if(cmd_tbl->nr_of_post && cmd_tbl->post_cmds)
      free(cmd_tbl->post_cmds);
    if(cmd_tbl->nr_of_cell && cmd_tbl->cell_cmds)
      free(cmd_tbl->cell_cmds);
    free(cmd_tbl);
  }
}

810 811
static int ifoRead_PGC_PROGRAM_MAP(ifo_handle_t *ifofile,
                                   pgc_program_map_t *program_map,
812
                                   unsigned int nr, unsigned int offset) {
813 814 815 816
  unsigned int size = nr * sizeof(pgc_program_map_t);

  if(!DVDFileSeek_(ifofile->file, offset))
    return 0;
817

818 819 820 821 822 823
  if(!(DVDReadBytes(ifofile->file, program_map, size)))
    return 0;

  return 1;
}

824
static int ifoRead_CELL_PLAYBACK_TBL(ifo_handle_t *ifofile,
825 826 827 828 829 830 831 832 833 834 835 836 837 838
                                     cell_playback_t *cell_playback,
                                     unsigned int nr, unsigned int offset) {
  unsigned int i;
  unsigned int size = nr * sizeof(cell_playback_t);

  if(!DVDFileSeek_(ifofile->file, offset))
    return 0;

  if(!(DVDReadBytes(ifofile->file, cell_playback, size)))
    return 0;

  for(i = 0; i < nr; i++) {
    read_cell_playback(&cell_playback[i]);
    /* Changed < to <= because this was false in the movie 'Pi'. */
839
    CHECK_VALUE(cell_playback[i].last_vobu_start_sector <=
840
                cell_playback[i].last_sector);
841
    CHECK_VALUE(cell_playback[i].first_sector <=
842
                cell_playback[i].last_vobu_start_sector);
843 844 845 846 847 848
  }

  return 1;
}


849 850
static int ifoRead_CELL_POSITION_TBL(ifo_handle_t *ifofile,
                                     cell_position_t *cell_position,
851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873
                                     unsigned int nr, unsigned int offset) {
  unsigned int i;
  unsigned int size = nr * sizeof(cell_position_t);

  if(!DVDFileSeek_(ifofile->file, offset))
    return 0;

  if(!(DVDReadBytes(ifofile->file, cell_position, size)))
    return 0;

  for(i = 0; i < nr; i++) {
    B2N_16(cell_position[i].vob_id_nr);
    CHECK_ZERO(cell_position[i].zero_1);
  }

  return 1;
}

static int ifoRead_PGC(ifo_handle_t *ifofile, pgc_t *pgc, unsigned int offset) {
  unsigned int i;

  if(!DVDFileSeek_(ifofile->file, offset))
    return 0;
874

875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892
  if(!(DVDReadBytes(ifofile->file, pgc, PGC_SIZE)))
    return 0;

  read_user_ops(&pgc->prohibited_ops);
  B2N_16(pgc->next_pgc_nr);
  B2N_16(pgc->prev_pgc_nr);
  B2N_16(pgc->goup_pgc_nr);
  B2N_16(pgc->command_tbl_offset);
  B2N_16(pgc->program_map_offset);
  B2N_16(pgc->cell_playback_offset);
  B2N_16(pgc->cell_position_offset);

  for(i = 0; i < 8; i++)
    B2N_16(pgc->audio_control[i]);
  for(i = 0; i < 32; i++)
    B2N_32(pgc->subp_control[i]);
  for(i = 0; i < 16; i++)
    B2N_32(pgc->palette[i]);
893

894 895 896 897 898
  CHECK_ZERO(pgc->zero_1);
  CHECK_VALUE(pgc->nr_of_programs <= pgc->nr_of_cells);

  /* verify time (look at print_time) */
  for(i = 0; i < 8; i++)
899
    if(!(pgc->audio_control[i] & 0x8000)) /* The 'is present' bit */
900 901
      CHECK_ZERO(pgc->audio_control[i]);
  for(i = 0; i < 32; i++)
902
    if(!(pgc->subp_control[i] & 0x80000000)) /* The 'is present' bit */
903
      CHECK_ZERO(pgc->subp_control[i]);
904

905 906 907 908 909 910 911 912 913 914 915 916
  /* Check that time is 0:0:0:0 also if nr_of_programs == 0 */
  if(pgc->nr_of_programs == 0) {
    CHECK_ZERO(pgc->still_time);
    CHECK_ZERO(pgc->pg_playback_mode); /* ?? */
    CHECK_VALUE(pgc->program_map_offset == 0);
    CHECK_VALUE(pgc->cell_playback_offset == 0);
    CHECK_VALUE(pgc->cell_position_offset == 0);
  } else {
    CHECK_VALUE(pgc->program_map_offset != 0);
    CHECK_VALUE(pgc->cell_playback_offset != 0);
    CHECK_VALUE(pgc->cell_position_offset != 0);
  }
917

918
  if(pgc->command_tbl_offset != 0) {
919
    pgc->command_tbl = calloc(1, sizeof(pgc_command_tbl_t));
920 921 922
    if(!pgc->command_tbl)
      return 0;

923
    if(!ifoRead_PGC_COMMAND_TBL(ifofile, pgc->command_tbl,
924 925 926 927 928 929
                                offset + pgc->command_tbl_offset)) {
      return 0;
    }
  } else {
    pgc->command_tbl = NULL;
  }
930

931
  if(pgc->program_map_offset != 0 && pgc->nr_of_programs>0) {
932
    pgc->program_map = calloc(pgc->nr_of_programs, sizeof(pgc_program_map_t));
933 934 935 936 937 938 939 940 941 942
    if(!pgc->program_map) {
      return 0;
    }
    if(!ifoRead_PGC_PROGRAM_MAP(ifofile, pgc->program_map,pgc->nr_of_programs,
                                offset + pgc->program_map_offset)) {
      return 0;
    }
  } else {
    pgc->program_map = NULL;
  }
943

944
  if(pgc->cell_playback_offset != 0 && pgc->nr_of_cells>0) {
945
    pgc->cell_playback = calloc(pgc->nr_of_cells, sizeof(cell_playback_t));
946 947 948
    if(!pgc->cell_playback) {
      return 0;
    }
949
    if(!ifoRead_CELL_PLAYBACK_TBL(ifofile, pgc->cell_playback,
950
                                  pgc->nr_of_cells,
951 952 953 954 955 956
                                  offset + pgc->cell_playback_offset)) {
      return 0;
    }
  } else {
    pgc->cell_playback = NULL;
  }
957

958
  if(pgc->cell_position_offset != 0 && pgc->nr_of_cells>0) {
959
    pgc->cell_position = calloc(pgc->nr_of_cells, sizeof(cell_position_t));
960 961 962
    if(!pgc->cell_position) {
      return 0;
    }
963
    if(!ifoRead_CELL_POSITION_TBL(ifofile, pgc->cell_position,
964
                                  pgc->nr_of_cells,
965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
                                  offset + pgc->cell_position_offset)) {
      return 0;
    }
  } else {
    pgc->cell_position = NULL;
  }

  return 1;
}

int ifoRead_FP_PGC(ifo_handle_t *ifofile) {

  if(!ifofile)
    return 0;

  if(!ifofile->vmgi_mat)
    return 0;
982

983
  /* It seems that first_play_pgc is optional after all. */
984 985
  ifofile->first_play_pgc = NULL;
  if(!ifofile->vmgi_mat->first_play_pgc)
986
    return 1;
987

988
  ifofile->first_play_pgc = calloc(1, sizeof(pgc_t));
989 990
  if(!ifofile->first_play_pgc)
    return 0;
991

992
  ifofile->first_play_pgc->ref_count = 1;
993
  if(!ifoRead_PGC(ifofile, ifofile->first_play_pgc,
994
                  ifofile->vmgi_mat->first_play_pgc)) {
995
    ifoFree_PGC(&ifofile->first_play_pgc);
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    return 0;
  }

  return 1;
}

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static void ifoFree_PGC(pgc_t **pgc) {
  if(pgc && *pgc && (--(*pgc)->ref_count) <= 0) {
    ifoFree_PGC_COMMAND_TBL((*pgc)->command_tbl);
    if((*pgc)->program_map)
      free((*pgc)->program_map);
    if((*pgc)->cell_playback)
      free((*pgc)->cell_playback);
    if((*pgc)->cell_position)
      free((*pgc)->cell_position);
    free(*pgc);
  }
  if (pgc) {
    *pgc = NULL;
1015 1016 1017 1018 1019 1020
  }
}

void ifoFree_FP_PGC(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
1021

1022
  if(ifofile->first_play_pgc) {
1023
    ifoFree_PGC(&ifofile->first_play_pgc);
1024 1025 1026 1027 1028 1029
  }
}


int ifoRead_TT_SRPT(ifo_handle_t *ifofile) {
  tt_srpt_t *tt_srpt;
1030 1031
  unsigned int i;
  size_t info_length;
1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044

  if(!ifofile)
    return 0;

  if(!ifofile->vmgi_mat)
    return 0;

  if(ifofile->vmgi_mat->tt_srpt == 0) /* mandatory */
    return 0;

  if(!DVDFileSeek_(ifofile->file, ifofile->vmgi_mat->tt_srpt * DVD_BLOCK_LEN))
    return 0;

1045
  tt_srpt = calloc(1, sizeof(tt_srpt_t));
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  if(!tt_srpt)
    return 0;

  ifofile->tt_srpt = tt_srpt;
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1051 1052 1053 1054 1055 1056 1057 1058
  if(!(DVDReadBytes(ifofile->file, tt_srpt, TT_SRPT_SIZE))) {
    fprintf(stderr, "libdvdread: Unable to read read TT_SRPT.\n");
    free(tt_srpt);
    return 0;
  }

  B2N_16(tt_srpt->nr_of_srpts);
  B2N_32(tt_srpt->last_byte);
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1060 1061
  info_length = tt_srpt->last_byte + 1 - TT_SRPT_SIZE;

1062
  tt_srpt->title = calloc(1, info_length);
1063 1064
  if(!tt_srpt->title) {
    free(tt_srpt);
1065
    ifofile->tt_srpt = NULL;
1066 1067 1068 1069 1070 1071 1072 1073
    return 0;
  }
  if(!(DVDReadBytes(ifofile->file, tt_srpt->title, info_length))) {
    fprintf(stderr, "libdvdread: Unable to read read TT_SRPT.\n");
    ifoFree_TT_SRPT(ifofile);
    return 0;
  }

1074
  if(tt_srpt->nr_of_srpts>info_length/sizeof(title_info_t)){
1075
    fprintf(stderr,"libdvdread: data mismatch: info_length (%zd)!= nr_of_srpts (%d). Truncating.\n",
1076 1077 1078 1079
            info_length/sizeof(title_info_t),tt_srpt->nr_of_srpts);
    tt_srpt->nr_of_srpts=info_length/sizeof(title_info_t);
  }

1080 1081 1082 1083 1084
  for(i =  0; i < tt_srpt->nr_of_srpts; i++) {
    B2N_16(tt_srpt->title[i].nr_of_ptts);
    B2N_16(tt_srpt->title[i].parental_id);
    B2N_32(tt_srpt->title[i].title_set_sector);
  }
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1086 1087 1088 1089

  CHECK_ZERO(tt_srpt->zero_1);
  CHECK_VALUE(tt_srpt->nr_of_srpts != 0);
  CHECK_VALUE(tt_srpt->nr_of_srpts < 100); /* ?? */
1090
  CHECK_VALUE(tt_srpt->nr_of_srpts * sizeof(title_info_t) <= info_length);
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1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105
  for(i = 0; i < tt_srpt->nr_of_srpts; i++) {
    read_playback_type(&tt_srpt->title[i].pb_ty);
    CHECK_VALUE(tt_srpt->title[i].pb_ty.zero_1 == 0);
    CHECK_VALUE(tt_srpt->title[i].nr_of_angles != 0);
    CHECK_VALUE(tt_srpt->title[i].nr_of_angles < 10);
    /* CHECK_VALUE(tt_srpt->title[i].nr_of_ptts != 0); */
    /* XXX: this assertion breaks Ghostbusters: */
    CHECK_VALUE(tt_srpt->title[i].nr_of_ptts < 1000); /* ?? */
    CHECK_VALUE(tt_srpt->title[i].title_set_nr != 0);
    CHECK_VALUE(tt_srpt->title[i].title_set_nr < 100); /* ?? */
    CHECK_VALUE(tt_srpt->title[i].vts_ttn != 0);
    CHECK_VALUE(tt_srpt->title[i].vts_ttn < 100); /* ?? */
    /* CHECK_VALUE(tt_srpt->title[i].title_set_sector != 0); */
  }
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  /* Make this a function */
#if 0
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  if(memcmp((uint8_t *)tt_srpt->title +
            tt_srpt->nr_of_srpts * sizeof(title_info_t),
            my_friendly_zeros,
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            info_length - tt_srpt->nr_of_srpts * sizeof(title_info_t))) {
    fprintf(stderr, "VMG_PTT_SRPT slack is != 0, ");
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    hexdump((uint8_t *)tt_srpt->title +
            tt_srpt->nr_of_srpts * sizeof(title_info_t),
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            info_length - tt_srpt->nr_of_srpts * sizeof(title_info_t));
  }
#endif

  return 1;
}


void ifoFree_TT_SRPT(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
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  if(ifofile->tt_srpt) {
    free(ifofile->tt_srpt->title);
    free(ifofile->tt_srpt);
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    ifofile->tt_srpt->title = NULL;
    ifofile->tt_srpt = NULL;
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  }
}


int ifoRead_VTS_PTT_SRPT(ifo_handle_t *ifofile) {
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  vts_ptt_srpt_t *vts_ptt_srpt = NULL;
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  int info_length, i, j;
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  uint32_t *data = NULL;
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  if(!ifofile)
    return 0;
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  if(!ifofile->vtsi_mat)
    return 0;

  if(ifofile->vtsi_mat->vts_ptt_srpt == 0) /* mandatory */
    return 0;
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1151
  if(!DVDFileSeek_(ifofile->file,
1152
                   ifofile->vtsi_mat->vts_ptt_srpt * DVD_BLOCK_LEN))
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    return 0;

1155
  vts_ptt_srpt = calloc(1, sizeof(vts_ptt_srpt_t));
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  if(!vts_ptt_srpt)
    return 0;

1159
  vts_ptt_srpt->title = NULL;
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  ifofile->vts_ptt_srpt = vts_ptt_srpt;

  if(!(DVDReadBytes(ifofile->file, vts_ptt_srpt, VTS_PTT_SRPT_SIZE))) {
    fprintf(stderr, "libdvdread: Unable to read PTT search table.\n");
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    goto fail;
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  }

  B2N_16(vts_ptt_srpt->nr_of_srpts);
  B2N_32(vts_ptt_srpt->last_byte);

  CHECK_ZERO(vts_ptt_srpt->zero_1);
  CHECK_VALUE(vts_ptt_srpt->nr_of_srpts != 0);
  CHECK_VALUE(vts_ptt_srpt->nr_of_srpts < 100); /* ?? */
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1174
  info_length = vts_ptt_srpt->last_byte + 1 - VTS_PTT_SRPT_SIZE;
1175
  data = calloc(1, info_length);
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  if(!data)
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    goto fail;
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1179 1180
  if(!(DVDReadBytes(ifofile->file, data, info_length))) {
    fprintf(stderr, "libdvdread: Unable to read PTT search table.\n");
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    goto fail;
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  }

1184 1185 1186 1187
  if(vts_ptt_srpt->nr_of_srpts > info_length / sizeof(*data)) {
    fprintf(stderr, "libdvdread: PTT search table too small.\n");
    goto fail;
  }
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  if(vts_ptt_srpt->nr_of_srpts == 0) {
    fprintf(stderr, "libdvdread: Zero entries in PTT search table.\n");
    goto fail;
  }

1194
  for(i = 0; i < vts_ptt_srpt->nr_of_srpts; i++) {
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    /* Transformers 3 has PTT start bytes that point outside the SRPT PTT */
    uint32_t start = data[i];
    B2N_32(start);
    if(start + sizeof(ptt_info_t) > vts_ptt_srpt->last_byte + 1) {
      /* don't mess with any bytes beyond the end of the allocation */
      vts_ptt_srpt->nr_of_srpts = i;
      break;
    }
    data[i] = start;
1204
    /* assert(data[i] + sizeof(ptt_info_t) <= vts_ptt_srpt->last_byte + 1);
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       Magic Knight Rayearth Daybreak is mastered very strange and has
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       Titles with 0 PTTs. They all have a data[i] offsets beyond the end of
       of the vts_ptt_srpt structure. */
    CHECK_VALUE(data[i] + sizeof(ptt_info_t) <= vts_ptt_srpt->last_byte + 1 + 4);
  }
1210

1211
  vts_ptt_srpt->ttu_offset = data;
1212

1213
  vts_ptt_srpt->title = calloc(vts_ptt_srpt->nr_of_srpts, sizeof(ttu_t));
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  if(!vts_ptt_srpt->title)
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    goto fail;
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  for(i = 0; i < vts_ptt_srpt->nr_of_srpts; i++) {
    int n;
    if(i < vts_ptt_srpt->nr_of_srpts - 1)
      n = (data[i+1] - data[i]);
    else
      n = (vts_ptt_srpt->last_byte + 1 - data[i]);
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1223

1224
    /* assert(n > 0 && (n % 4) == 0);
1225
       Magic Knight Rayearth Daybreak is mastered very strange and has
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       Titles with 0 PTTs. */
    if(n < 0) n = 0;
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1228

1229
    /* DVDs created by the VDR-to-DVD device LG RC590M violate the following requirement */
1230
    CHECK_VALUE(n % 4 == 0);
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1232
    vts_ptt_srpt->title[i].nr_of_ptts = n / 4;
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    vts_ptt_srpt->title[i].ptt = calloc(n, sizeof(ptt_info_t));
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    if(!vts_ptt_srpt->title[i].ptt) {
      for(n = 0; n < i; n++)
        free(vts_ptt_srpt->title[n].ptt);
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      goto fail;
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    }
    for(j = 0; j < vts_ptt_srpt->title[i].nr_of_ptts; j++) {
      /* The assert placed here because of Magic Knight Rayearth Daybreak */
      CHECK_VALUE(data[i] + sizeof(ptt_info_t) <= vts_ptt_srpt->last_byte + 1);
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      vts_ptt_srpt->title[i].ptt[j].pgcn
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        = *(uint16_t*)(((char *)data) + data[i] + 4*j - VTS_PTT_SRPT_SIZE);
1245
      vts_ptt_srpt->title[i].ptt[j].pgn
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        = *(uint16_t*)(((char *)data) + data[i] + 4*j + 2 - VTS_PTT_SRPT_SIZE);
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      if(!vts_ptt_srpt->title[i].ptt[j].pgn)
        goto fail;
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    }
  }
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  for(i = 0; i < vts_ptt_srpt->nr_of_srpts; i++) {
    for(j = 0; j < vts_ptt_srpt->title[i].nr_of_ptts; j++) {
      B2N_16(vts_ptt_srpt->title[i].ptt[j].pgcn);
      B2N_16(vts_ptt_srpt->title[i].ptt[j].pgn);
    }
  }
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1259 1260 1261 1262 1263 1264 1265
  for(i = 0; i < vts_ptt_srpt->nr_of_srpts; i++) {
    CHECK_VALUE(vts_ptt_srpt->title[i].nr_of_ptts < 1000); /* ?? */
    for(j = 0; j < vts_ptt_srpt->title[i].nr_of_ptts; j++) {
      CHECK_VALUE(vts_ptt_srpt->title[i].ptt[j].pgcn != 0 );
      CHECK_VALUE(vts_ptt_srpt->title[i].ptt[j].pgcn < 1000); /* ?? */
      CHECK_VALUE(vts_ptt_srpt->title[i].ptt[j].pgn != 0);
      CHECK_VALUE(vts_ptt_srpt->title[i].ptt[j].pgn < 100); /* ?? */
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      if (vts_ptt_srpt->title[i].ptt[j].pgcn == 0 ||
          vts_ptt_srpt->title[i].ptt[j].pgcn >= 1000 ||
          vts_ptt_srpt->title[i].ptt[j].pgn == 0 ||
          vts_ptt_srpt->title[i].ptt[j].pgn >= 100) {
        return 0;
      }

1273 1274 1275 1276
    }
  }

  return 1;
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fail:
  free(data);
1280
  ifofile->vts_ptt_srpt = NULL;
1281
  free(vts_ptt_srpt->title);
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  free(vts_ptt_srpt);
  return 0;
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}


void ifoFree_VTS_PTT_SRPT(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
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1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309
  if(ifofile->vts_ptt_srpt) {
    int i;
    for(i = 0; i < ifofile->vts_ptt_srpt->nr_of_srpts; i++)
      free(ifofile->vts_ptt_srpt->title[i].ptt);
    free(ifofile->vts_ptt_srpt->ttu_offset);
    free(ifofile->vts_ptt_srpt->title);
    free(ifofile->vts_ptt_srpt);
    ifofile->vts_ptt_srpt = 0;
  }
}


int ifoRead_PTL_MAIT(ifo_handle_t *ifofile) {
  ptl_mait_t *ptl_mait;
  int info_length;
  unsigned int i, j;

  if(!ifofile)
    return 0;
1310

1311 1312
  if(!ifofile->vmgi_mat)
    return 0;
1313

1314
  if(!ifofile->vmgi_mat->ptl_mait)
1315 1316 1317 1318 1319
    return 1;

  if(!DVDFileSeek_(ifofile->file, ifofile->vmgi_mat->ptl_mait * DVD_BLOCK_LEN))
    return 0;

1320
  ptl_mait = calloc(1, sizeof(ptl_mait_t));
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  if(!ptl_mait)
    return 0;

  ifofile->ptl_mait = ptl_mait;

  if(!(DVDReadBytes(ifofile->file, ptl_mait, PTL_MAIT_SIZE))) {
    free(ptl_mait);
1328
    ifofile->ptl_mait = NULL;
1329 1330 1331 1332 1333 1334
    return 0;
  }

  B2N_16(ptl_mait->nr_of_countries);
  B2N_16(ptl_mait->nr_of_vtss);
  B2N_32(ptl_mait->last_byte);
1335

1336 1337 1338 1339
  CHECK_VALUE(ptl_mait->nr_of_countries != 0);
  CHECK_VALUE(ptl_mait->nr_of_countries < 100); /* ?? */
  CHECK_VALUE(ptl_mait->nr_of_vtss != 0);
  CHECK_VALUE(ptl_mait->nr_of_vtss < 100); /* ?? */
1340
  CHECK_VALUE(ptl_mait->nr_of_countries * PTL_MAIT_COUNTRY_SIZE
1341
              <= ptl_mait->last_byte + 1 - PTL_MAIT_SIZE);
1342

1343
  info_length = ptl_mait->nr_of_countries * sizeof(ptl_mait_country_t);
1344
  ptl_mait->countries = calloc(1, info_length);
1345 1346
  if(!ptl_mait->countries) {
    free(ptl_mait);
1347
    ifofile->ptl_mait = NULL;
1348 1349
    return 0;
  }
1350 1351 1352
  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    ptl_mait->countries[i].pf_ptl_mai = NULL;
  }
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1354 1355 1356 1357 1358
  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    if(!(DVDReadBytes(ifofile->file, &ptl_mait->countries[i], PTL_MAIT_COUNTRY_SIZE))) {
      fprintf(stderr, "libdvdread: Unable to read PTL_MAIT.\n");
      free(ptl_mait->countries);
      free(ptl_mait);
1359
      ifofile->ptl_mait = NULL;
1360 1361 1362 1363 1364 1365 1366 1367
      return 0;
    }
  }

  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    B2N_16(ptl_mait->countries[i].country_code);
    B2N_16(ptl_mait->countries[i].pf_ptl_mai_start_byte);
  }
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1369 1370
  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    CHECK_ZERO(ptl_mait->countries[i].zero_1);
1371
    CHECK_ZERO(ptl_mait->countries[i].zero_2);
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    CHECK_VALUE(ptl_mait->countries[i].pf_ptl_mai_start_byte
1373
                + sizeof(pf_level_t) * (ptl_mait->nr_of_vtss + 1) <= ptl_mait->last_byte + 1);
1374 1375 1376 1377
  }

  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    uint16_t *pf_temp;
1378 1379

    if(!DVDFileSeek_(ifofile->file,
1380
                     ifofile->vmgi_mat->ptl_mait * DVD_BLOCK_LEN
1381
                     + ptl_mait->countries[i].pf_ptl_mai_start_byte)) {
1382
      fprintf(stderr, "libdvdread: Unable to seek PTL_MAIT table at index %d.\n",i);
1383 1384
      free(ptl_mait->countries);
      free(ptl_mait);
1385
      ifofile->ptl_mait = NULL;
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      return 0;
    }
    info_length = (ptl_mait->nr_of_vtss + 1) * sizeof(pf_level_t);
1389
    pf_temp = calloc(1, info_length);
1390
    if(!pf_temp) {
1391
      free_ptl_mait(ptl_mait, i);
1392
      ifofile->ptl_mait = NULL;
1393 1394
      return 0;
    }
1395
    memset(pf_temp, 0, info_length);
1396
    if(!(DVDReadBytes(ifofile->file, pf_temp, info_length))) {
1397
      fprintf(stderr, "libdvdread: Unable to read PTL_MAIT table at index %d.\n",i);
1398 1399
      free(pf_temp);
      free_ptl_mait(ptl_mait, i);
1400
      ifofile->ptl_mait = NULL;
1401
      return 0;
1402
    }
1403
    for (j = 0; j < ((ptl_mait->nr_of_vtss + 1U) * 8U); j++) {
1404
      B2N_16(pf_temp[j]);
1405
    }
1406
    ptl_mait->countries[i].pf_ptl_mai = calloc(1, info_length);
1407 1408
    if(!ptl_mait->countries[i].pf_ptl_mai) {
      free(pf_temp);
1409
      free_ptl_mait(ptl_mait, i);
1410
      ifofile->ptl_mait = NULL;
1411 1412 1413 1414
      return 0;
    }
    { /* Transpose the array so we can use C indexing. */
      int level, vts;
1415
      for(level = 0; level < PTL_MAIT_NUM_LEVEL; level++) {
1416 1417 1418 1419
        for(vts = 0; vts <= ptl_mait->nr_of_vtss; vts++) {
          ptl_mait->countries[i].pf_ptl_mai[vts][level] =
            pf_temp[(7-level)*(ptl_mait->nr_of_vtss+1) + vts];
        }
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      }
      free(pf_temp);
    }
  }
  return 1;
}

void ifoFree_PTL_MAIT(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
1430

1431
  if(ifofile->ptl_mait) {
1432 1433
    unsigned int i;

1434
    for(i = 0; i < ifofile->ptl_mait->nr_of_countries; i++) {
1435
      free(ifofile->ptl_mait->countries[i].pf_ptl_mai);
1436 1437 1438
    }
    free(ifofile->ptl_mait->countries);
    free(ifofile->ptl_mait);
1439
    ifofile->ptl_mait = NULL;
1440 1441 1442 1443 1444 1445 1446 1447 1448
  }
}

int ifoRead_VTS_TMAPT(ifo_handle_t *ifofile) {
  vts_tmapt_t *vts_tmapt;
  uint32_t *vts_tmap_srp;
  unsigned int offset;
  int info_length;
  unsigned int i, j;
1449

1450 1451 1452 1453 1454 1455
  if(!ifofile)
    return 0;

  if(!ifofile->vtsi_mat)
    return 0;

1456
  if(ifofile->vtsi_mat->vts_tmapt == 0) {
1457 1458 1459
    ifofile->vts_tmapt = NULL;
    return 1;
  }
1460

1461
  offset = ifofile->vtsi_mat->vts_tmapt * DVD_BLOCK_LEN;
1462 1463

  if(!DVDFileSeek_(ifofile->file, offset))
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