ifo_read.c

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/* -*- c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 * Copyright (C) 2000, 2001, 2002, 2003
 *               Bj鰎n Englund <[e-mail]>, 
 *               H錵an Hjort <[e-mail]>
 *
 * Modified for use with MPlayer, changes contained in libdvdread_changes.diff.
 * detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
 * $Id: ifo_read.c,v 1.2 2008/03/03 08:11:34 dsqiu Exp $
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"

#include <mplaylib.h>
#include <mplaylib.h>

#if defined(HAVE_INTTYPES_H)
#include <inttypes.h>
#elif defined(HAVE_STDINT_H)
#include <stdint.h>
#endif

#include <mplaylib.h>
#include <errno.h>

#include "bswap.h"
#include "ifo_types.h"
#include "ifo_read.h"
#include "dvd_reader.h"
#include "dvdread_internal.h"

#ifndef DVD_BLOCK_LEN
#define DVD_BLOCK_LEN 2048
#endif

#ifndef NDEBUG
#define CHECK_ZERO0(arg)                                                \
  if(arg != 0) {                                                        \
    fprintf(stderr, "*** Zero check failed in %s:%i\n    for %s = 0x%x\n", \
            __FILE__, __LINE__, # arg, arg);                            \
  }
#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");                                              \
  }
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);
static int ifoRead_PGC_COMMAND_TBL(ifo_handle_t *ifofile, 
                                   pgc_command_tbl_t *cmd_tbl, 
                                   unsigned int offset);
static int ifoRead_PGC_PROGRAM_MAP(ifo_handle_t *ifofile, 
                                   pgc_program_map_t *program_map, 
                                   unsigned int nr, unsigned int offset);
static int ifoRead_CELL_PLAYBACK_TBL(ifo_handle_t *ifofile, 
                                     cell_playback_t *cell_playback, 
                                     unsigned int nr, unsigned int offset);
static int ifoRead_CELL_POSITION_TBL(ifo_handle_t *ifofile, 
                                     cell_position_t *cell_position, 
                                     unsigned int nr, unsigned int offset);
static int ifoRead_VTS_ATTRIBUTES(ifo_handle_t *ifofile, 
                                  vts_attributes_t *vts_attributes, 
                                  unsigned int offset);
static int ifoRead_C_ADT_internal(ifo_handle_t *ifofile, c_adt_t *c_adt, 
                                  unsigned int sector);
static int ifoRead_VOBU_ADMAP_internal(ifo_handle_t *ifofile, 
                                       vobu_admap_t *vobu_admap, 
                                       unsigned int sector);
static int ifoRead_PGCIT_internal(ifo_handle_t *ifofile, pgcit_t *pgcit, 
                                  unsigned int offset);

static void ifoFree_PGC(pgc_t *pgc);
static void ifoFree_PGC_COMMAND_TBL(pgc_command_tbl_t *cmd_tbl);
static void ifoFree_PGCIT_internal(pgcit_t *pgcit);

static ifo_handle_t *ifoOpen_File(ifo_handle_t *ifofile, int title, 
                                  char *suffix);
static ifo_handle_t *ifoOpenVMGI_File(ifo_handle_t *ifofile, char *suffix);
static ifo_handle_t *ifoOpenVTSI_File(ifo_handle_t *ifofile, int title,
                                      char *suffix);

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


ifo_handle_t *ifoOpen(dvd_reader_t *dvd, int title) {
  ifo_handle_t *ifofile;

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

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

  ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_FILE);
  if(!ifoOpen_File(ifofile, title, "IFO")) {
    if(title) {
      if(dvdread_verbose(dvd) >= 1) {
        fprintf(stderr, "libdvdread: Can't open file VTS_%02d_0.%s.\n", 
                title, "IFO");
      }
    } else {
      if(dvdread_verbose(dvd) >= 1) {
        fprintf(stderr, "libdvdread: Can't open file VIDEO_TS.%s.\n", "IFO");
      }
    }
    /* lower functions free the pointer, reallocate */
    ifofile = (ifo_handle_t *)malloc(sizeof(ifo_handle_t));
    if(!ifofile)
      return NULL;

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

    ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_BACKUP_FILE);
    if(!ifoOpen_File(ifofile, title, "BUP")) {
      if(title) {
        if(dvdread_verbose(dvd) >= 1) {
          fprintf(stderr, "libdvdread: Can't open file VTS_%02d_0.%s.\n", 
                  title, "BUP");
        }
      } else {
        if(dvdread_verbose(dvd) >= 1) {
          fprintf(stderr, "libdvdread: Can't open file VIDEO_TS.%s.\n", "BUP");
        }
      }
      return NULL;
    }
  }
  return ifofile;
}

static ifo_handle_t *ifoOpen_File(ifo_handle_t *ifofile, int title, 
                                  char *suffix) {
  if(!ifofile->file) {
    free(ifofile);
    return NULL;
  }

  /* 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)) {
      if(dvdread_verbose(device_of_file(ifofile->file)) >= 0) {
        fprintf(stderr, "libdvdread: Invalid main menu IFO (VIDEO_TS.%s).\n",
                suffix);
      }
      ifoClose(ifofile);
      return NULL;
    }

    ifoRead_PGCI_UT(ifofile);
    ifoRead_PTL_MAIT(ifofile);

    /* This is also mandatory. */
    if(!ifoRead_VTS_ATRT(ifofile)) {
      if(dvdread_verbose(device_of_file(ifofile->file)) >= 0) {
        fprintf(stderr, "libdvdread: Invalid main menu IFO (VIDEO_TS.%s).\n",
                suffix);
      }
      ifoClose(ifofile);
      return NULL;
    }

    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)) {
      if(dvdread_verbose(device_of_file(ifofile->file)) >= 0) {
        fprintf(stderr, "libdvdread: Invalid title IFO (VTS_%02d_0.%s).\n",
                title, suffix);
      }
      ifoClose(ifofile);
      return NULL;
    }

    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)) {
      if(dvdread_verbose(device_of_file(ifofile->file)) >= 0) {
        fprintf(stderr, "libdvdread: Invalid title IFO (VTS_%02d_0.%s).\n",
                title, suffix);
      }
      ifoClose(ifofile);
      return NULL;
    }

    return ifofile;
  }

  if(title) {
    if(dvdread_verbose(device_of_file(ifofile->file)) >= 0) {
      fprintf(stderr, "libdvdread: Invalid IFO for title %d (VTS_%02d_0.%s).\n",
              title, title, suffix);
    }
  } else {
    if(dvdread_verbose(device_of_file(ifofile->file)) >= 0) {
      fprintf(stderr, "libdvdread: Invalid IFO for VMGM (VIDEO_TS.%s).\n", 
              suffix);
    }
  }
  ifoClose(ifofile);
  return NULL;
}


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

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

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

  ifofile->file = DVDOpenFile(dvd, 0, DVD_READ_INFO_FILE);
  if(!ifoOpenVMGI_File(ifofile, "IFO")) {
    if(dvdread_verbose(dvd) >= 1) {
      fprintf(stderr, "libdvdread: Can't open file VIDEO_TS.IFO: %s\n",
              strerror(errno));
    }

    /* lower functions free the pointer, reallocate */
    ifofile = (ifo_handle_t *)malloc(sizeof(ifo_handle_t));
    if(!ifofile)
      return NULL;

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

    ifofile->file = DVDOpenFile(dvd, 0, DVD_READ_INFO_BACKUP_FILE);
    if(!ifoOpenVMGI_File(ifofile, "BUP"))
      if(dvdread_verbose(dvd) >= 1) {
        fprintf(stderr, "libdvdread: Can't open file VIDEO_TS.BUP: %s\n",
                strerror(errno));
      }
      return NULL;
  }
  return ifofile;
}

static ifo_handle_t *ifoOpenVMGI_File(ifo_handle_t *ifofile, char *suffix) {
  if(!ifofile->file) {
    free(ifofile);
    return NULL;
  }

  if(ifoRead_VMG(ifofile))
    return ifofile;

  if(dvdread_verbose(device_of_file(ifofile->file)) >= 0) {
    fprintf(stderr, "libdvdread: Invalid main menu IFO (VIDEO_TS.%s).\n", 
            suffix);
  }
  ifoClose(ifofile);
  return NULL;
}


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

  memset(ifofile, 0, sizeof(ifo_handle_t));
  
  if(title <= 0 || title > 99) {
    if(dvdread_verbose(dvd) >= 0) {
      fprintf(stderr, "libdvdread: ifoOpenVTSI invalid title (%d).\n", title);
    }
    free(ifofile);
    errno = EINVAL;
    return NULL;
  }
    
  ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_FILE);
  if(!ifoOpenVTSI_File(ifofile, title, "IFO")) {
    if(dvdread_verbose(dvd) >= 1) {
      fprintf(stderr, "libdvdread: Can't open file VTS_%02d_0.%s.\n", title, "IFO");
    }
    /* lower functions free the pointer, reallocate */
    ifofile = (ifo_handle_t *)malloc(sizeof(ifo_handle_t));
    if(!ifofile)
      return NULL;

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

    ifofile->file = DVDOpenFile(dvd, title, DVD_READ_INFO_BACKUP_FILE);
    if(!ifoOpenVTSI_File(ifofile, title, "BUP"))
      if(dvdread_verbose(dvd) >= 1) {
        fprintf(stderr, "libdvdread: Can't open file VTS_%02d_0.%s.\n", title, "BUP");
      }
      return NULL;
  }
  return ifofile;
}

static ifo_handle_t *ifoOpenVTSI_File(ifo_handle_t* ifofile, int title, char *suffix) {
  if(!ifofile->file) {
    free(ifofile);
    return NULL;
  }

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

  if(dvdread_verbose(device_of_file(ifofile->file)) >= 0) {
    fprintf(stderr, "libdvdread: Invalid IFO for title %d (VTS_%02d_0.%s).\n",
            title, title, suffix);
  }
  ifoClose(ifofile);
  return NULL;
}


void ifoClose(ifo_handle_t *ifofile) {
  if(!ifofile)
    return;
  
  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;

  vmgi_mat = malloc(sizeof(vmgi_mat_t));
  if(!vmgi_mat)
    return 0;

  ifofile->vmgi_mat = vmgi_mat;

  if(!DVDFileSeek_(ifofile->file, 0)) {
    free(ifofile->vmgi_mat);
    ifofile->vmgi_mat = 0;
    return 0;
  }

  if(!DVDReadBytes(ifofile->file, vmgi_mat, sizeof(vmgi_mat_t))) {
    free(ifofile->vmgi_mat);
    ifofile->vmgi_mat = 0;
    return 0;
  }

  if(strncmp("DVDVIDEO-VMG", vmgi_mat->vmg_identifier, 12) != 0) {
    free(ifofile->vmgi_mat);
    ifofile->vmgi_mat = 0;
    return 0;
  }
  
  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);
  B2N_16(vmgi_mat->vmgm_audio_attr.lang_code);
  B2N_16(vmgi_mat->vmgm_subp_attr.lang_code);


  CHECK_ZERO(vmgi_mat->zero_1);
  CHECK_ZERO(vmgi_mat->zero_2);
  CHECK_ZERO(vmgi_mat->zero_3);
  CHECK_ZERO(vmgi_mat->zero_4);