ifo_read.c 67.3 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 = calloc(1, sizeof(ifo_handle_t));
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  if(!ifofile)
    return NULL;

  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 = calloc(1, sizeof(ifo_handle_t));
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  if(!ifofile)
    return NULL;

  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 = calloc(1, sizeof(ifo_handle_t));
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  if(!ifofile)
    return NULL;

  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 = calloc(1, sizeof(ifo_handle_t));
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  if(!ifofile)
    return NULL;

  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;

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  vmgi_mat = calloc(1, sizeof(vmgi_mat_t));
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  if(!vmgi_mat)
    return 0;

  ifofile->vmgi_mat = vmgi_mat;

  if(!DVDFileSeek_(ifofile->file, 0)) {
    free(ifofile->vmgi_mat);
521
    ifofile->vmgi_mat = NULL;
522 523 524 525 526
    return 0;
  }

  if(!DVDReadBytes(ifofile->file, vmgi_mat, sizeof(vmgi_mat_t))) {
    free(ifofile->vmgi_mat);
527
    ifofile->vmgi_mat = NULL;
528 529 530 531 532
    return 0;
  }

  if(strncmp("DVDVIDEO-VMG", vmgi_mat->vmg_identifier, 12) != 0) {
    free(ifofile->vmgi_mat);
533
    ifofile->vmgi_mat = NULL;
534 535
    return 0;
  }
536

537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560
  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);
561 562
  /* DVDs created by VDR-to-DVD device LG RC590M violate the following check with
   * vmgi_mat->zero_3 = 0x00000000010000000000000000000000000000. */
563 564 565 566 567 568 569
  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);
570
  CHECK_ZERO(vmgi_mat->zero_10);
571 572 573 574 575 576 577 578 579 580
  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);
581
  CHECK_VALUE(vmgi_mat->vmgi_last_byte / DVD_BLOCK_LEN <=
582
              vmgi_mat->vmgi_last_sector);
583 584
  /* It seems that first_play_pgc is optional. */
  CHECK_VALUE(vmgi_mat->first_play_pgc < vmgi_mat->vmgi_last_byte);
585
  CHECK_VALUE(vmgi_mat->vmgm_vobs == 0 ||
586 587
              (vmgi_mat->vmgm_vobs > vmgi_mat->vmgi_last_sector &&
               vmgi_mat->vmgm_vobs < vmgi_mat->vmg_last_sector));
588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606
  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;

607
  vtsi_mat = calloc(1, sizeof(vtsi_mat_t));
608 609
  if(!vtsi_mat)
    return 0;
610

611 612 613 614
  ifofile->vtsi_mat = vtsi_mat;

  if(!DVDFileSeek_(ifofile->file, 0)) {
    free(ifofile->vtsi_mat);
615
    ifofile->vtsi_mat = NULL;
616 617 618 619 620
    return 0;
  }

  if(!(DVDReadBytes(ifofile->file, vtsi_mat, sizeof(vtsi_mat_t)))) {
    free(ifofile->vtsi_mat);
621
    ifofile->vtsi_mat = NULL;
622 623 624 625 626
    return 0;
  }

  if(strncmp("DVDVIDEO-VTS", vtsi_mat->vts_identifier, 12) != 0) {
    free(ifofile->vtsi_mat);
627
    ifofile->vtsi_mat = NULL;
628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677
    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);
678
  CHECK_VALUE(vtsi_mat->vtsm_vobs == 0 ||
679 680
              (vtsi_mat->vtsm_vobs > vtsi_mat->vtsi_last_sector &&
               vtsi_mat->vtsm_vobs < vtsi_mat->vts_last_sector));
681
  CHECK_VALUE(vtsi_mat->vtstt_vobs == 0 ||
682 683
              (vtsi_mat->vtstt_vobs > vtsi_mat->vtsi_last_sector &&
               vtsi_mat->vtstt_vobs < vtsi_mat->vts_last_sector));
684 685 686 687 688 689 690 691
  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);
692

693 694 695 696 697 698 699 700 701
  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++)
702 703
    CHECK_ZERO(vtsi_mat->vts_subp_attr[i]);

704 705 706 707 708 709 710 711 712
  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);
  }
713

714 715 716 717
  return 1;
}


718 719
static int ifoRead_PGC_COMMAND_TBL(ifo_handle_t *ifofile,
                                   pgc_command_tbl_t *cmd_tbl,
720
                                   unsigned int offset) {
721

722
  memset(cmd_tbl, 0, sizeof(pgc_command_tbl_t));
723

724 725 726 727 728 729 730 731 732 733 734
  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);
735

736 737
  if(cmd_tbl->nr_of_pre != 0) {
    unsigned int pre_cmds_size  = cmd_tbl->nr_of_pre * COMMAND_DATA_SIZE;
738
    cmd_tbl->pre_cmds = malloc(pre_cmds_size);
739 740 741 742 743 744 745 746
    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;
    }
  }
747

748 749
  if(cmd_tbl->nr_of_post != 0) {
    unsigned int post_cmds_size = cmd_tbl->nr_of_post * COMMAND_DATA_SIZE;
750
    cmd_tbl->post_cmds = malloc(post_cmds_size);
751
    if(!cmd_tbl->post_cmds) {
752
      if(cmd_tbl->pre_cmds)
753
        free(cmd_tbl->pre_cmds);
754 755 756
      return 0;
    }
    if(!(DVDReadBytes(ifofile->file, cmd_tbl->post_cmds, post_cmds_size))) {
757
      if(cmd_tbl->pre_cmds)
758
        free(cmd_tbl->pre_cmds);
759 760 761 762 763 764 765
      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;
766
    cmd_tbl->cell_cmds = malloc(cell_cmds_size);
767 768
    if(!cmd_tbl->cell_cmds) {
      if(cmd_tbl->pre_cmds)
769
        free(cmd_tbl->pre_cmds);
770
      if(cmd_tbl->post_cmds)
771
        free(cmd_tbl->post_cmds);
772 773 774
      return 0;
    }
    if(!(DVDReadBytes(ifofile->file, cmd_tbl->cell_cmds, cell_cmds_size))) {
775
      if(cmd_tbl->pre_cmds)
776
        free(cmd_tbl->pre_cmds);
777
      if(cmd_tbl->post_cmds)
778
        free(cmd_tbl->post_cmds);
779 780 781 782
      free(cmd_tbl->cell_cmds);
      return 0;
    }
  }
783 784

  /*
785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
   * 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);
  }
}

803 804
static int ifoRead_PGC_PROGRAM_MAP(ifo_handle_t *ifofile,
                                   pgc_program_map_t *program_map,
805
                                   unsigned int nr, unsigned int offset) {
806 807 808 809
  unsigned int size = nr * sizeof(pgc_program_map_t);

  if(!DVDFileSeek_(ifofile->file, offset))
    return 0;
810

811 812 813 814 815 816
  if(!(DVDReadBytes(ifofile->file, program_map, size)))
    return 0;

  return 1;
}

817
static int ifoRead_CELL_PLAYBACK_TBL(ifo_handle_t *ifofile,
818 819 820 821 822 823 824 825 826 827 828 829 830 831
                                     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'. */
832
    CHECK_VALUE(cell_playback[i].last_vobu_start_sector <=
833
                cell_playback[i].last_sector);
834
    CHECK_VALUE(cell_playback[i].first_sector <=
835
                cell_playback[i].last_vobu_start_sector);
836 837 838 839 840 841
  }

  return 1;
}


842 843
static int ifoRead_CELL_POSITION_TBL(ifo_handle_t *ifofile,
                                     cell_position_t *cell_position,
844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866
                                     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;
867

868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885
  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]);
886

887 888 889 890 891
  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++)
892
    if(!(pgc->audio_control[i] & 0x8000)) /* The 'is present' bit */
893 894
      CHECK_ZERO(pgc->audio_control[i]);
  for(i = 0; i < 32; i++)
895
    if(!(pgc->subp_control[i] & 0x80000000)) /* The 'is present' bit */
896
      CHECK_ZERO(pgc->subp_control[i]);
897

898 899 900 901 902 903 904 905 906 907 908 909
  /* 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);
  }
910

911
  if(pgc->command_tbl_offset != 0) {
912
    pgc->command_tbl = calloc(1, sizeof(pgc_command_tbl_t));
913 914 915
    if(!pgc->command_tbl)
      return 0;

916
    if(!ifoRead_PGC_COMMAND_TBL(ifofile, pgc->command_tbl,
917 918 919 920 921 922
                                offset + pgc->command_tbl_offset)) {
      return 0;
    }
  } else {
    pgc->command_tbl = NULL;
  }
923

924
  if(pgc->program_map_offset != 0 && pgc->nr_of_programs>0) {
925
    pgc->program_map = calloc(pgc->nr_of_programs, sizeof(pgc_program_map_t));
926 927 928 929 930 931 932 933 934 935
    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;
  }
936

937
  if(pgc->cell_playback_offset != 0 && pgc->nr_of_cells>0) {
938
    pgc->cell_playback = calloc(pgc->nr_of_cells, sizeof(cell_playback_t));
939 940 941
    if(!pgc->cell_playback) {
      return 0;
    }
942
    if(!ifoRead_CELL_PLAYBACK_TBL(ifofile, pgc->cell_playback,
943
                                  pgc->nr_of_cells,
944 945 946 947 948 949
                                  offset + pgc->cell_playback_offset)) {
      return 0;
    }
  } else {
    pgc->cell_playback = NULL;
  }
950

951
  if(pgc->cell_position_offset != 0 && pgc->nr_of_cells>0) {
952
    pgc->cell_position = calloc(pgc->nr_of_cells, sizeof(cell_position_t));
953 954 955
    if(!pgc->cell_position) {
      return 0;
    }
956
    if(!ifoRead_CELL_POSITION_TBL(ifofile, pgc->cell_position,
957
                                  pgc->nr_of_cells,
958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974
                                  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;
975

976
  /* It seems that first_play_pgc is optional after all. */
977 978
  ifofile->first_play_pgc = NULL;
  if(!ifofile->vmgi_mat->first_play_pgc)
979
    return 1;
980

981
  ifofile->first_play_pgc = calloc(1, sizeof(pgc_t));
982 983
  if(!ifofile->first_play_pgc)
    return 0;
984

985
  ifofile->first_play_pgc->ref_count = 1;
986
  if(!ifoRead_PGC(ifofile, ifofile->first_play_pgc,
987
                  ifofile->vmgi_mat->first_play_pgc)) {
988
    ifoFree_PGC(&ifofile->first_play_pgc);
989 990 991 992 993 994
    return 0;
  }

  return 1;
}

995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007
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;
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  }
}

void ifoFree_FP_PGC(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
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1015
  if(ifofile->first_play_pgc) {
1016
    ifoFree_PGC(&ifofile->first_play_pgc);
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  }
}


int ifoRead_TT_SRPT(ifo_handle_t *ifofile) {
  tt_srpt_t *tt_srpt;
1023 1024
  unsigned int i;
  size_t info_length;
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  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;

1038
  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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  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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1053 1054
  info_length = tt_srpt->last_byte + 1 - TT_SRPT_SIZE;

1055
  tt_srpt->title = calloc(1, info_length);
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  if(!tt_srpt->title) {
    free(tt_srpt);
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    ifofile->tt_srpt = NULL;
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    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;
  }

1067
  if(tt_srpt->nr_of_srpts>info_length/sizeof(title_info_t)){
1068
    fprintf(stderr,"libdvdread: data mismatch: info_length (%zd)!= nr_of_srpts (%d). Truncating.\n",
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            info_length/sizeof(title_info_t),tt_srpt->nr_of_srpts);
    tt_srpt->nr_of_srpts=info_length/sizeof(title_info_t);
  }

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  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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  CHECK_ZERO(tt_srpt->zero_1);
  CHECK_VALUE(tt_srpt->nr_of_srpts != 0);
  CHECK_VALUE(tt_srpt->nr_of_srpts < 100); /* ?? */
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  CHECK_VALUE(tt_srpt->nr_of_srpts * sizeof(title_info_t) <= info_length);
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  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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  if(!DVDFileSeek_(ifofile->file,
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                   ifofile->vtsi_mat->vts_ptt_srpt * DVD_BLOCK_LEN))
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    return 0;

1148
  vts_ptt_srpt = calloc(1, sizeof(vts_ptt_srpt_t));
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  if(!vts_ptt_srpt)
    return 0;

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  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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  info_length = vts_ptt_srpt->last_byte + 1 - VTS_PTT_SRPT_SIZE;
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  data = calloc(1, info_length);
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  if(!data)
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    goto fail;
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  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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  }

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  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;
  }

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  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;
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    /* 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);
  }
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  vts_ptt_srpt->ttu_offset = data;
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1206
  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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1217
    /* assert(n > 0 && (n % 4) == 0);
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       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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    /* DVDs created by the VDR-to-DVD device LG RC590M violate the following requirement */
1223
    CHECK_VALUE(n % 4 == 0);
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    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);
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      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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  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;
      }

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    }
  }

  return 1;
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fail:
  free(data);
1273
  ifofile->vts_ptt_srpt = NULL;
1274
  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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1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302
  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;
1303

1304 1305
  if(!ifofile->vmgi_mat)
    return 0;
1306

1307
  if(!ifofile->vmgi_mat->ptl_mait)
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    return 1;

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

1313
  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);
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    ifofile->ptl_mait = NULL;
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    return 0;
  }

  B2N_16(ptl_mait->nr_of_countries);
  B2N_16(ptl_mait->nr_of_vtss);
  B2N_32(ptl_mait->last_byte);
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1329 1330 1331 1332
  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); /* ?? */
1333
  CHECK_VALUE(ptl_mait->nr_of_countries * PTL_MAIT_COUNTRY_SIZE
1334
              <= ptl_mait->last_byte + 1 - PTL_MAIT_SIZE);
1335

1336
  info_length = ptl_mait->nr_of_countries * sizeof(ptl_mait_country_t);
1337
  ptl_mait->countries = calloc(1, info_length);
1338 1339
  if(!ptl_mait->countries) {
    free(ptl_mait);
1340
    ifofile->ptl_mait = NULL;
1341 1342
    return 0;
  }
1343 1344 1345
  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    ptl_mait->countries[i].pf_ptl_mai = NULL;
  }
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1347 1348 1349 1350 1351
  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);
1352
      ifofile->ptl_mait = NULL;
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      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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1362 1363
  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    CHECK_ZERO(ptl_mait->countries[i].zero_1);
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    CHECK_ZERO(ptl_mait->countries[i].zero_2);
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    CHECK_VALUE(ptl_mait->countries[i].pf_ptl_mai_start_byte
1366
                + sizeof(pf_level_t) * (ptl_mait->nr_of_vtss + 1) <= ptl_mait->last_byte + 1);
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  }

  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    uint16_t *pf_temp;
1371 1372

    if(!DVDFileSeek_(ifofile->file,
1373
                     ifofile->vmgi_mat->ptl_mait * DVD_BLOCK_LEN
1374
                     + ptl_mait->countries[i].pf_ptl_mai_start_byte)) {
1375
      fprintf(stderr, "libdvdread: Unable to seek PTL_MAIT table at index %d.\n",i);
1376 1377
      free(ptl_mait->countries);
      free(ptl_mait);
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      ifofile->ptl_mait = NULL;
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      return 0;
    }
    info_length = (ptl_mait->nr_of_vtss + 1) * sizeof(pf_level_t);
1382
    pf_temp = calloc(1, info_length);
1383
    if(!pf_temp) {
1384
      free_ptl_mait(ptl_mait, i);
1385
      ifofile->ptl_mait = NULL;
1386 1387
      return 0;
    }
1388
    memset(pf_temp, 0, info_length);
1389
    if(!(DVDReadBytes(ifofile->file, pf_temp, info_length))) {
1390
      fprintf(stderr, "libdvdread: Unable to read PTL_MAIT table at index %d.\n",i);
1391 1392
      free(pf_temp);
      free_ptl_mait(ptl_mait, i);
1393
      ifofile->ptl_mait = NULL;
1394
      return 0;
1395
    }
1396
    for (j = 0; j < ((ptl_mait->nr_of_vtss + 1U) * 8U); j++) {
1397
      B2N_16(pf_temp[j]);
1398
    }
1399
    ptl_mait->countries[i].pf_ptl_mai = calloc(1, info_length);
1400 1401
    if(!ptl_mait->countries[i].pf_ptl_mai) {
      free(pf_temp);
1402
      free_ptl_mait(ptl_mait, i);
1403
      ifofile->ptl_mait = NULL;
1404 1405 1406 1407
      return 0;
    }
    { /* Transpose the array so we can use C indexing. */
      int level, vts;
1408
      for(level = 0; level < PTL_MAIT_NUM_LEVEL; level++) {
1409 1410 1411 1412
        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;
1423

1424
  if(ifofile->ptl_mait) {
1425 1426
    unsigned int i;

1427
    for(i = 0; i < ifofile->ptl_mait->nr_of_countries; i++) {
1428
      free(ifofile->ptl_mait->countries[i].pf_ptl_mai);
1429 1430 1431
    }
    free(ifofile->ptl_mait->countries);
    free(ifofile->ptl_mait);
1432
    ifofile->ptl_mait = NULL;
1433 1434 1435 1436 1437 1438 1439 1440 1441
  }
}

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;
1442

1443 1444 1445 1446 1447 1448
  if(!ifofile)
    return 0;

  if(!ifofile->vtsi_mat)
    return 0;

1449
  if(ifofile->vtsi_mat->vts_tmapt == 0) {
1450 1451 1452
    ifofile->vts_tmapt = NULL;
    return 1;
  }
1453

1454
  offset = ifofile->vtsi_mat->vts_tmapt * DVD_BLOCK_LEN;
1455 1456

  if(!DVDFileSeek_(ifofile->file, offset))
1457
    return 0;
1458

1459
  vts_tmapt = calloc(1, sizeof(vts_tmapt_t));