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);
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  ps->zero_1                         = dvdread_getbits(&state, 4);
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  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);
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  cp->zero_1                          = dvdread_getbits(&state, 1);
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  cp->playback_mode                   = dvdread_getbits(&state, 1);
  cp->restricted                      = dvdread_getbits(&state, 1);
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  cp->cell_type                       = dvdread_getbits(&state, 5);
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  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);
522
    ifofile->vmgi_mat = NULL;
523 524 525 526 527
    return 0;
  }

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

  if(strncmp("DVDVIDEO-VMG", vmgi_mat->vmg_identifier, 12) != 0) {
    free(ifofile->vmgi_mat);
534
    ifofile->vmgi_mat = NULL;
535 536
    return 0;
  }
537

538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561
  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);
562 563
  /* DVDs created by VDR-to-DVD device LG RC590M violate the following check with
   * vmgi_mat->zero_3 = 0x00000000010000000000000000000000000000. */
564 565 566 567 568 569 570
  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);
571
  CHECK_ZERO(vmgi_mat->zero_10);
572 573 574 575 576 577 578 579 580 581
  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);
582
  CHECK_VALUE(vmgi_mat->vmgi_last_byte / DVD_BLOCK_LEN <=
583
              vmgi_mat->vmgi_last_sector);
584 585
  /* It seems that first_play_pgc is optional. */
  CHECK_VALUE(vmgi_mat->first_play_pgc < vmgi_mat->vmgi_last_byte);
586
  CHECK_VALUE(vmgi_mat->vmgm_vobs == 0 ||
587 588
              (vmgi_mat->vmgm_vobs > vmgi_mat->vmgi_last_sector &&
               vmgi_mat->vmgm_vobs < vmgi_mat->vmg_last_sector));
589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607
  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;

608
  vtsi_mat = calloc(1, sizeof(vtsi_mat_t));
609 610
  if(!vtsi_mat)
    return 0;
611

612 613 614 615
  ifofile->vtsi_mat = vtsi_mat;

  if(!DVDFileSeek_(ifofile->file, 0)) {
    free(ifofile->vtsi_mat);
616
    ifofile->vtsi_mat = NULL;
617 618 619 620 621
    return 0;
  }

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

  if(strncmp("DVDVIDEO-VTS", vtsi_mat->vts_identifier, 12) != 0) {
    free(ifofile->vtsi_mat);
628
    ifofile->vtsi_mat = NULL;
629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678
    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);
679
  CHECK_VALUE(vtsi_mat->vtsm_vobs == 0 ||
680 681
              (vtsi_mat->vtsm_vobs > vtsi_mat->vtsi_last_sector &&
               vtsi_mat->vtsm_vobs < vtsi_mat->vts_last_sector));
682
  CHECK_VALUE(vtsi_mat->vtstt_vobs == 0 ||
683 684
              (vtsi_mat->vtstt_vobs > vtsi_mat->vtsi_last_sector &&
               vtsi_mat->vtstt_vobs < vtsi_mat->vts_last_sector));
685 686 687 688 689 690 691 692
  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);
693

694 695 696 697 698 699 700 701 702
  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++)
703 704
    CHECK_ZERO(vtsi_mat->vts_subp_attr[i]);

705 706 707 708 709 710 711 712 713
  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);
  }
714

715 716 717 718
  return 1;
}


719 720
static int ifoRead_PGC_COMMAND_TBL(ifo_handle_t *ifofile,
                                   pgc_command_tbl_t *cmd_tbl,
721
                                   unsigned int offset) {
722

723 724 725 726 727 728 729 730 731 732 733
  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);
734

735 736
  if(cmd_tbl->nr_of_pre != 0) {
    unsigned int pre_cmds_size  = cmd_tbl->nr_of_pre * COMMAND_DATA_SIZE;
737
    cmd_tbl->pre_cmds = malloc(pre_cmds_size);
738 739 740 741 742 743 744 745
    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;
    }
  }
746

747 748
  if(cmd_tbl->nr_of_post != 0) {
    unsigned int post_cmds_size = cmd_tbl->nr_of_post * COMMAND_DATA_SIZE;
749
    cmd_tbl->post_cmds = malloc(post_cmds_size);
750
    if(!cmd_tbl->post_cmds) {
751
      if(cmd_tbl->pre_cmds)
752
        free(cmd_tbl->pre_cmds);
753 754 755
      return 0;
    }
    if(!(DVDReadBytes(ifofile->file, cmd_tbl->post_cmds, post_cmds_size))) {
756
      if(cmd_tbl->pre_cmds)
757
        free(cmd_tbl->pre_cmds);
758 759 760 761 762 763 764
      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;
765
    cmd_tbl->cell_cmds = malloc(cell_cmds_size);
766 767
    if(!cmd_tbl->cell_cmds) {
      if(cmd_tbl->pre_cmds)
768
        free(cmd_tbl->pre_cmds);
769
      if(cmd_tbl->post_cmds)
770
        free(cmd_tbl->post_cmds);
771 772 773
      return 0;
    }
    if(!(DVDReadBytes(ifofile->file, cmd_tbl->cell_cmds, cell_cmds_size))) {
774
      if(cmd_tbl->pre_cmds)
775
        free(cmd_tbl->pre_cmds);
776
      if(cmd_tbl->post_cmds)
777
        free(cmd_tbl->post_cmds);
778 779 780 781
      free(cmd_tbl->cell_cmds);
      return 0;
    }
  }
782 783

  /*
784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801
   * 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);
  }
}

802 803
static int ifoRead_PGC_PROGRAM_MAP(ifo_handle_t *ifofile,
                                   pgc_program_map_t *program_map,
804
                                   unsigned int nr, unsigned int offset) {
805 806 807 808
  unsigned int size = nr * sizeof(pgc_program_map_t);

  if(!DVDFileSeek_(ifofile->file, offset))
    return 0;
809

810 811 812 813 814 815
  if(!(DVDReadBytes(ifofile->file, program_map, size)))
    return 0;

  return 1;
}

816
static int ifoRead_CELL_PLAYBACK_TBL(ifo_handle_t *ifofile,
817 818 819 820 821 822 823 824 825 826 827 828 829 830
                                     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'. */
831
    CHECK_VALUE(cell_playback[i].last_vobu_start_sector <=
832
                cell_playback[i].last_sector);
833
    CHECK_VALUE(cell_playback[i].first_sector <=
834
                cell_playback[i].last_vobu_start_sector);
835 836 837 838 839 840
  }

  return 1;
}


841 842
static int ifoRead_CELL_POSITION_TBL(ifo_handle_t *ifofile,
                                     cell_position_t *cell_position,
843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865
                                     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;
866

867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884
  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]);
885

886 887 888 889 890
  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++)
891
    if(!(pgc->audio_control[i] & 0x8000)) /* The 'is present' bit */
892 893
      CHECK_ZERO(pgc->audio_control[i]);
  for(i = 0; i < 32; i++)
894
    if(!(pgc->subp_control[i] & 0x80000000)) /* The 'is present' bit */
895
      CHECK_ZERO(pgc->subp_control[i]);
896

897 898 899 900 901 902 903 904 905 906 907 908
  /* 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);
  }
909

910
  if(pgc->command_tbl_offset != 0) {
911
    pgc->command_tbl = calloc(1, sizeof(pgc_command_tbl_t));
912 913 914
    if(!pgc->command_tbl)
      return 0;

915
    if(!ifoRead_PGC_COMMAND_TBL(ifofile, pgc->command_tbl,
916 917 918 919 920 921
                                offset + pgc->command_tbl_offset)) {
      return 0;
    }
  } else {
    pgc->command_tbl = NULL;
  }
922

923
  if(pgc->program_map_offset != 0 && pgc->nr_of_programs>0) {
924
    pgc->program_map = calloc(pgc->nr_of_programs, sizeof(pgc_program_map_t));
925 926 927 928 929 930 931 932 933 934
    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;
  }
935

936
  if(pgc->cell_playback_offset != 0 && pgc->nr_of_cells>0) {
937
    pgc->cell_playback = calloc(pgc->nr_of_cells, sizeof(cell_playback_t));
938 939 940
    if(!pgc->cell_playback) {
      return 0;
    }
941
    if(!ifoRead_CELL_PLAYBACK_TBL(ifofile, pgc->cell_playback,
942
                                  pgc->nr_of_cells,
943 944 945 946 947 948
                                  offset + pgc->cell_playback_offset)) {
      return 0;
    }
  } else {
    pgc->cell_playback = NULL;
  }
949

950
  if(pgc->cell_position_offset != 0 && pgc->nr_of_cells>0) {
951
    pgc->cell_position = calloc(pgc->nr_of_cells, sizeof(cell_position_t));
952 953 954
    if(!pgc->cell_position) {
      return 0;
    }
955
    if(!ifoRead_CELL_POSITION_TBL(ifofile, pgc->cell_position,
956
                                  pgc->nr_of_cells,
957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973
                                  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;
974

975
  /* It seems that first_play_pgc is optional after all. */
976 977
  ifofile->first_play_pgc = NULL;
  if(!ifofile->vmgi_mat->first_play_pgc)
978
    return 1;
979

980
  ifofile->first_play_pgc = calloc(1, sizeof(pgc_t));
981 982
  if(!ifofile->first_play_pgc)
    return 0;
983

984
  ifofile->first_play_pgc->ref_count = 1;
985
  if(!ifoRead_PGC(ifofile, ifofile->first_play_pgc,
986
                  ifofile->vmgi_mat->first_play_pgc)) {
987
    ifoFree_PGC(&ifofile->first_play_pgc);
988 989 990 991 992 993
    return 0;
  }

  return 1;
}

994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
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;
1007 1008 1009 1010 1011 1012
  }
}

void ifoFree_FP_PGC(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
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1014
  if(ifofile->first_play_pgc) {
1015
    ifoFree_PGC(&ifofile->first_play_pgc);
1016 1017 1018 1019 1020 1021
  }
}


int ifoRead_TT_SRPT(ifo_handle_t *ifofile) {
  tt_srpt_t *tt_srpt;
1022 1023
  unsigned int i;
  size_t info_length;
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036

  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;

1037
  tt_srpt = calloc(1, sizeof(tt_srpt_t));
1038 1039 1040 1041
  if(!tt_srpt)
    return 0;

  ifofile->tt_srpt = tt_srpt;
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1043 1044 1045 1046 1047 1048 1049 1050
  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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1052 1053 1054 1055
  /* E-One releases don't fill this field */
  if(tt_srpt->last_byte == 0) {
    tt_srpt->last_byte = tt_srpt->nr_of_srpts * sizeof(title_info_t) - 1 + TT_SRPT_SIZE;
  }
1056 1057
  info_length = tt_srpt->last_byte + 1 - TT_SRPT_SIZE;

1058
  tt_srpt->title = calloc(1, info_length);
1059 1060
  if(!tt_srpt->title) {
    free(tt_srpt);
1061
    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;
  }

1070
  if(tt_srpt->nr_of_srpts>info_length/sizeof(title_info_t)){
1071
    fprintf(stderr,"libdvdread: data mismatch: info_length (%zd)!= nr_of_srpts (%d). Truncating.\n",
1072 1073 1074 1075
            info_length/sizeof(title_info_t),tt_srpt->nr_of_srpts);
    tt_srpt->nr_of_srpts=info_length/sizeof(title_info_t);
  }

1076 1077 1078 1079 1080
  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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1082 1083 1084 1085

  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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1124 1125
  if(ifofile->tt_srpt) {
    free(ifofile->tt_srpt->title);
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    ifofile->tt_srpt->title = NULL;
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    free(ifofile->tt_srpt);
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    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,
1148
                   ifofile->vtsi_mat->vts_ptt_srpt * DVD_BLOCK_LEN))
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    return 0;

1151
  vts_ptt_srpt = calloc(1, sizeof(vts_ptt_srpt_t));
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  if(!vts_ptt_srpt)
    return 0;

1155
  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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  /* E-One releases don't fill this field */
  if(vts_ptt_srpt->last_byte == 0) {
    vts_ptt_srpt->last_byte  = vts_ptt_srpt->nr_of_srpts * sizeof(*data) - 1 + VTS_PTT_SRPT_SIZE;
  }
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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  }

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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;
  }

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;
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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;
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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1217 1218 1219 1220 1221 1222
  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);
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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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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);
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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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  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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1257 1258 1259 1260 1261 1262 1263
  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); /* ?? */
1264
      //don't abort here. E-One DVDs contain PTT with pgcn or pgn == 0
1265 1266 1267 1268
    }
  }

  return 1;
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fail:
  free(data);
1272
  ifofile->vts_ptt_srpt = NULL;
1273
  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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1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301
  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;
1302

1303 1304
  if(!ifofile->vmgi_mat)
    return 0;
1305

1306
  if(!ifofile->vmgi_mat->ptl_mait)
1307 1308 1309 1310 1311
    return 1;

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

1312
  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);
1320
    ifofile->ptl_mait = NULL;
1321 1322 1323 1324 1325 1326
    return 0;
  }

  B2N_16(ptl_mait->nr_of_countries);
  B2N_16(ptl_mait->nr_of_vtss);
  B2N_32(ptl_mait->last_byte);
1327

1328 1329 1330 1331
  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); /* ?? */
1332
  CHECK_VALUE(ptl_mait->nr_of_countries * PTL_MAIT_COUNTRY_SIZE
1333
              <= ptl_mait->last_byte + 1 - PTL_MAIT_SIZE);
1334

1335
  info_length = ptl_mait->nr_of_countries * sizeof(ptl_mait_country_t);
1336
  ptl_mait->countries = calloc(1, info_length);
1337 1338
  if(!ptl_mait->countries) {
    free(ptl_mait);
1339
    ifofile->ptl_mait = NULL;
1340 1341
    return 0;
  }
1342 1343 1344
  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    ptl_mait->countries[i].pf_ptl_mai = NULL;
  }
1345

1346 1347 1348 1349 1350
  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);
1351
      ifofile->ptl_mait = NULL;
1352 1353 1354 1355 1356 1357 1358 1359
      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);
  }
1360

1361 1362
  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    CHECK_ZERO(ptl_mait->countries[i].zero_1);
1363
    CHECK_ZERO(ptl_mait->countries[i].zero_2);
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    CHECK_VALUE(ptl_mait->countries[i].pf_ptl_mai_start_byte
1365
                + sizeof(pf_level_t) * (ptl_mait->nr_of_vtss + 1) <= ptl_mait->last_byte + 1);
1366 1367 1368 1369
  }

  for(i = 0; i < ptl_mait->nr_of_countries; i++) {
    uint16_t *pf_temp;
1370 1371

    if(!DVDFileSeek_(ifofile->file,
1372
                     ifofile->vmgi_mat->ptl_mait * DVD_BLOCK_LEN
1373
                     + ptl_mait->countries[i].pf_ptl_mai_start_byte)) {
1374
      fprintf(stderr, "libdvdread: Unable to seek PTL_MAIT table at index %d.\n",i);
1375 1376
      free(ptl_mait->countries);
      free(ptl_mait);
1377
      ifofile->ptl_mait = NULL;
1378 1379 1380
      return 0;
    }
    info_length = (ptl_mait->nr_of_vtss + 1) * sizeof(pf_level_t);
1381
    pf_temp = calloc(1, info_length);
1382
    if(!pf_temp) {
1383
      free_ptl_mait(ptl_mait, i);
1384
      ifofile->ptl_mait = NULL;
1385 1386 1387
      return 0;
    }
    if(!(DVDReadBytes(ifofile->file, pf_temp, info_length))) {
1388
      fprintf(stderr, "libdvdread: Unable to read PTL_MAIT table at index %d.\n",i);
1389 1390
      free(pf_temp);
      free_ptl_mait(ptl_mait, i);
1391
      ifofile->ptl_mait = NULL;
1392
      return 0;
1393
    }
1394
    for (j = 0; j < ((ptl_mait->nr_of_vtss + 1U) * 8U); j++) {
1395
      B2N_16(pf_temp[j]);
1396
    }
1397
    ptl_mait->countries[i].pf_ptl_mai = calloc(1, info_length);
1398 1399
    if(!ptl_mait->countries[i].pf_ptl_mai) {
      free(pf_temp);
1400
      free_ptl_mait(ptl_mait, i);
1401
      ifofile->ptl_mait = NULL;
1402 1403 1404 1405
      return 0;
    }
    { /* Transpose the array so we can use C indexing. */
      int level, vts;
1406
      for(level = 0; level < PTL_MAIT_NUM_LEVEL; level++) {
1407 1408 1409 1410
        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];
        }
1411 1412 1413 1414 1415 1416 1417 1418 1419 1420
      }
      free(pf_temp);
    }
  }
  return 1;
}

void ifoFree_PTL_MAIT(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
1421

1422
  if(ifofile->ptl_mait) {
1423 1424
    unsigned int i;

1425
    for(i = 0; i < ifofile->ptl_mait->nr_of_countries; i++) {
1426
      free(ifofile->ptl_mait->countries[i].pf_ptl_mai);
1427 1428 1429
    }
    free(ifofile->ptl_mait->countries);
    free(ifofile->ptl_mait);
1430
    ifofile->ptl_mait = NULL;
1431 1432 1433 1434 1435 1436 1437 1438 1439
  }
}

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;
1440

1441 1442 1443 1444 1445 1446
  if(!ifofile)
    return 0;

  if(!ifofile->vtsi_mat)
    return 0;

1447
  if(ifofile->vtsi_mat->vts_tmapt == 0) {
1448 1449 1450
    ifofile->vts_tmapt = NULL;
    return 1;
  }
1451

1452
  offset = ifofile->vtsi_mat->vts_tmapt * DVD_BLOCK_LEN;
1453 1454

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