ifo_types.h

有关mpeg2的deocde代码

/**
 * Program Chain Information Table.
 */
typedef struct {
  uint16_t nr_of_pgci_srp;
  uint16_t zero_1;
  uint32_t last_byte;
  pgci_srp_t *pgci_srp;
} ATTRIBUTE_PACKED pgcit_t;
#define PGCIT_SIZE 8

/**
 * Menu PGCI Language Unit.
 */
typedef struct {
  uint16_t lang_code;
  uint8_t  lang_extension;
  uint8_t  exists;
  uint32_t lang_start_byte;
  pgcit_t *pgcit;
} ATTRIBUTE_PACKED pgci_lu_t;
#define PGCI_LU_SIZE 8

/**
 * Menu PGCI Unit Table.
 */
typedef struct {
  uint16_t nr_of_lus;
  uint16_t zero_1;
  uint32_t last_byte;
  pgci_lu_t *lu;
} ATTRIBUTE_PACKED pgci_ut_t;
#define PGCI_UT_SIZE 8

/**
 * Cell Address Information.
 */
typedef struct {
  uint16_t vob_id;
  uint8_t  cell_id;
  uint8_t  zero_1;
  uint32_t start_sector;
  uint32_t last_sector;
} ATTRIBUTE_PACKED cell_adr_t;

/**
 * Cell Address Table.
 */
typedef struct {
  uint16_t nr_of_vobs; /* VOBs */
  uint16_t zero_1;
  uint32_t last_byte;
  cell_adr_t *cell_adr_table;  /* No explicit size given. */
} ATTRIBUTE_PACKED c_adt_t;
#define C_ADT_SIZE 8

/**
 * VOBU Address Map.
 */
typedef struct {
  uint32_t last_byte;
  uint32_t *vobu_start_sectors;
} ATTRIBUTE_PACKED vobu_admap_t;
#define VOBU_ADMAP_SIZE 4




/**
 * VMGI
 *
 * The following structures relate to the Video Manager.
 */

/**
 * Video Manager Information Management Table.
 */
typedef struct {
  char     vmg_identifier[12];
  uint32_t vmg_last_sector;
  uint8_t  zero_1[12];
  uint32_t vmgi_last_sector;
  uint8_t  zero_2;
  uint8_t  specification_version;
  uint32_t vmg_category;
  uint16_t vmg_nr_of_volumes;
  uint16_t vmg_this_volume_nr;
  uint8_t  disc_side;
  uint8_t  zero_3[19];
  uint16_t vmg_nr_of_title_sets;  /* Number of VTSs. */
  char     provider_identifier[32];
  uint64_t vmg_pos_code;
  uint8_t  zero_4[24];
  uint32_t vmgi_last_byte;
  uint32_t first_play_pgc;
  uint8_t  zero_5[56];
  uint32_t vmgm_vobs;             /* sector */
  uint32_t tt_srpt;               /* sector */
  uint32_t vmgm_pgci_ut;          /* sector */
  uint32_t ptl_mait;              /* sector */
  uint32_t vts_atrt;              /* sector */
  uint32_t txtdt_mgi;             /* sector */
  uint32_t vmgm_c_adt;            /* sector */
  uint32_t vmgm_vobu_admap;       /* sector */
  uint8_t  zero_6[32];
  
  video_attr_t vmgm_video_attr;
  uint8_t  zero_7;
  uint8_t  nr_of_vmgm_audio_streams; /* should be 0 or 1 */
  audio_attr_t vmgm_audio_attr;
  audio_attr_t zero_8[7];
  uint8_t  zero_9[17];
  uint8_t  nr_of_vmgm_subp_streams; /* should be 0 or 1 */
  subp_attr_t  vmgm_subp_attr;
  subp_attr_t  zero_10[27];  /* XXX: how much 'padding' here? */
} ATTRIBUTE_PACKED vmgi_mat_t;

typedef struct {
#ifdef WORDS_BIGENDIAN
  unsigned int zero_1                    : 1;
  unsigned int multi_or_random_pgc_title : 1; /* 0: one sequential pgc title */
  unsigned int jlc_exists_in_cell_cmd    : 1;
  unsigned int jlc_exists_in_prepost_cmd : 1;
  unsigned int jlc_exists_in_button_cmd  : 1;
  unsigned int jlc_exists_in_tt_dom      : 1;
  unsigned int chapter_search_or_play    : 1; /* UOP 1 */
  unsigned int title_or_time_play        : 1; /* UOP 0 */
#else
  unsigned int title_or_time_play        : 1;
  unsigned int chapter_search_or_play    : 1;
  unsigned int jlc_exists_in_tt_dom      : 1;
  unsigned int jlc_exists_in_button_cmd  : 1;
  unsigned int jlc_exists_in_prepost_cmd : 1;
  unsigned int jlc_exists_in_cell_cmd    : 1;
  unsigned int multi_or_random_pgc_title : 1;
  unsigned int zero_1                    : 1;
#endif
} ATTRIBUTE_PACKED playback_type_t;

/**
 * Title Information.
 */
typedef struct {
  playback_type_t pb_ty;
  uint8_t  nr_of_angles;
  uint16_t nr_of_ptts;
  uint16_t parental_id;
  uint8_t  title_set_nr;
  uint8_t  vts_ttn;
  uint32_t title_set_sector;
} ATTRIBUTE_PACKED title_info_t;

/**
 * PartOfTitle Search Pointer Table.
 */
typedef struct {
  uint16_t nr_of_srpts;
  uint16_t zero_1;
  uint32_t last_byte;
  title_info_t *title;
} ATTRIBUTE_PACKED tt_srpt_t;
#define TT_SRPT_SIZE 8


/**
 * Parental Management Information Unit Table.
 * Level 1 (US: G), ..., 7 (US: NC-17), 8
 */
typedef uint16_t pf_level_t[8];

/**
 * Parental Management Information Unit Table.
 */
typedef struct {
  uint16_t country_code;
  uint16_t zero_1;
  uint16_t pf_ptl_mai_start_byte;
  uint16_t zero_2;
  pf_level_t *pf_ptl_mai; /* table of (nr_of_vtss + 1), video_ts is first */
} ATTRIBUTE_PACKED ptl_mait_country_t;
#define PTL_MAIT_COUNTRY_SIZE 8

/**
 * Parental Management Information Table.
 */
typedef struct {
  uint16_t nr_of_countries;
  uint16_t nr_of_vtss;
  uint32_t last_byte;
  ptl_mait_country_t *countries;
} ATTRIBUTE_PACKED ptl_mait_t;
#define PTL_MAIT_SIZE 8

/**
 * Video Title Set Attributes.
 */
typedef struct {
  uint32_t last_byte;
  uint32_t vts_cat;
  
  video_attr_t vtsm_vobs_attr;
  uint8_t  zero_1;
  uint8_t  nr_of_vtsm_audio_streams; /* should be 0 or 1 */
  audio_attr_t vtsm_audio_attr;
  audio_attr_t zero_2[7];  
  uint8_t  zero_3[16];
  uint8_t  zero_4;
  uint8_t  nr_of_vtsm_subp_streams; /* should be 0 or 1 */
  subp_attr_t vtsm_subp_attr;
  subp_attr_t zero_5[27];
  
  uint8_t  zero_6[2];
  
  video_attr_t vtstt_vobs_video_attr;
  uint8_t  zero_7;
  uint8_t  nr_of_vtstt_audio_streams;
  audio_attr_t vtstt_audio_attr[8];
  uint8_t  zero_8[16];
  uint8_t  zero_9;
  uint8_t  nr_of_vtstt_subp_streams;
  subp_attr_t vtstt_subp_attr[32];
} ATTRIBUTE_PACKED vts_attributes_t;
#define VTS_ATTRIBUTES_SIZE 542
#define VTS_ATTRIBUTES_MIN_SIZE 356

/**
 * Video Title Set Attribute Table.
 */
typedef struct {
  uint16_t nr_of_vtss;
  uint16_t zero_1;
  uint32_t last_byte;
  vts_attributes_t *vts;
  uint32_t *vts_atrt_offsets; /* offsets table for each vts_attributes */
} ATTRIBUTE_PACKED vts_atrt_t;
#define VTS_ATRT_SIZE 8

/**
 * Text Data. (Incomplete)
 */
typedef struct {
  uint32_t last_byte;    /* offsets are relative here */
  uint16_t offsets[100]; /* == nr_of_srpts + 1 (first is disc title) */
#if 0  
  uint16_t unknown; /* 0x48 ?? 0x48 words (16bit) info following */
  uint16_t zero_1;
  
  uint8_t type_of_info; /* ?? 01 == disc, 02 == Title, 04 == Title part */
  uint8_t unknown1;
  uint8_t unknown2;
  uint8_t unknown3;
  uint8_t unknown4; /* ?? allways 0x30 language?, text format? */
  uint8_t unknown5;
  uint16_t offset; /* from first */
  
  char text[12]; /* ended by 0x09 */
#endif
} ATTRIBUTE_PACKED txtdt_t;

/**
 * Text Data Language Unit. (Incomplete)
 */ 
typedef struct {
  uint16_t lang_code;
  uint16_t unknown;      /* 0x0001, title 1? disc 1? side 1? */
  uint32_t txtdt_start_byte;  /* prt, rel start of vmg_txtdt_mgi  */
  txtdt_t  *txtdt;
} ATTRIBUTE_PACKED txtdt_lu_t;
#define TXTDT_LU_SIZE 8

/**
 * Text Data Manager Information. (Incomplete)
 */
typedef struct {
  char disc_name[14];            /* how many bytes?? */
  uint16_t nr_of_language_units; /* 32bit??          */
  uint32_t last_byte;
  txtdt_lu_t *lu;
} ATTRIBUTE_PACKED txtdt_mgi_t;
#define TXTDT_MGI_SIZE 20


/**
 * VTS
 *
 * Structures relating to the Video Title Set (VTS).
 */

/**
 * Video Title Set Information Management Table.
 */
typedef struct {
  char vts_identifier[12];
  uint32_t vts_last_sector;
  uint8_t  zero_1[12];
  uint32_t vtsi_last_sector;
  uint8_t  zero_2;
  uint8_t  specification_version;
  uint32_t vts_category;
  uint16_t zero_3;
  uint16_t zero_4;
  uint8_t  zero_5;
  uint8_t  zero_6[19];
  uint16_t zero_7;
  uint8_t  zero_8[32];
  uint64_t zero_9;
  uint8_t  zero_10[24];
  uint32_t vtsi_last_byte;
  uint32_t zero_11;
  uint8_t  zero_12[56];
  uint32_t vtsm_vobs;       /* sector */
  uint32_t vtstt_vobs;      /* sector */
  uint32_t vts_ptt_srpt;    /* sector */
  uint32_t vts_pgcit;       /* sector */
  uint32_t vtsm_pgci_ut;    /* sector */
  uint32_t vts_tmapt;       /* sector */
  uint32_t vtsm_c_adt;      /* sector */
  uint32_t vtsm_vobu_admap; /* sector */
  uint32_t vts_c_adt;       /* sector */
  uint32_t vts_vobu_admap;  /* sector */
  uint8_t  zero_13[24];
  
  video_attr_t vtsm_video_attr;
  uint8_t  zero_14;
  uint8_t  nr_of_vtsm_audio_streams; /* should be 0 or 1 */
  audio_attr_t vtsm_audio_attr;
  audio_attr_t zero_15[7];
  uint8_t  zero_16[17];
  uint8_t  nr_of_vtsm_subp_streams; /* should be 0 or 1 */
  subp_attr_t vtsm_subp_attr;
  subp_attr_t zero_17[27];
  uint8_t  zero_18[2];
  
  video_attr_t vts_video_attr;
  uint8_t  zero_19;
  uint8_t  nr_of_vts_audio_streams;
  audio_attr_t vts_audio_attr[8];
  uint8_t  zero_20[17];
  uint8_t  nr_of_vts_subp_streams;
  subp_attr_t vts_subp_attr[32];
  uint16_t zero_21;
  multichannel_ext_t vts_mu_audio_attr[8];
  /* XXX: how much 'padding' here, if any? */
} ATTRIBUTE_PACKED vtsi_mat_t;

/**
 * PartOfTitle Unit Information.
 */
typedef struct {
  uint16_t pgcn;
  uint16_t pgn;
} ATTRIBUTE_PACKED ptt_info_t;

/**
 * PartOfTitle Information.
 */
typedef struct {
  uint16_t nr_of_ptts;
  ptt_info_t *ptt;
} ATTRIBUTE_PACKED ttu_t;

/**
 * PartOfTitle Search Pointer Table.
 */
typedef struct {
  uint16_t nr_of_srpts;
  uint16_t zero_1;
  uint32_t last_byte;
  ttu_t  *title;
  uint32_t *ttu_offset; /* offset table for each ttu */
} ATTRIBUTE_PACKED vts_ptt_srpt_t;
#define VTS_PTT_SRPT_SIZE 8


/**
 * Time Map Entry.
 */
/* Should this be bit field at all or just the uint32_t? */
typedef uint32_t map_ent_t;

/**
 * Time Map.
 */
typedef struct {
  uint8_t  tmu;   /* Time unit, in seconds */
  uint8_t  zero_1;
  uint16_t nr_of_entries;
  map_ent_t *map_ent;
} ATTRIBUTE_PACKED vts_tmap_t;
#define VTS_TMAP_SIZE 4

/**
 * Time Map Table.
 */
typedef struct {
  uint16_t nr_of_tmaps;
  uint16_t zero_1;
  uint32_t last_byte;
  vts_tmap_t *tmap;
  uint32_t *tmap_offset; /* offset table for each tmap */
} ATTRIBUTE_PACKED vts_tmapt_t;
#define VTS_TMAPT_SIZE 8


#if PRAGMA_PACK
#pragma pack()
#endif


/**
 * The following structure defines an IFO file.  The structure is divided into
 * two parts, the VMGI, or Video Manager Information, which is read from the
 * VIDEO_TS.[IFO,BUP] file, and the VTSI, or Video Title Set Information, which
 * is read in from the VTS_XX_0.[IFO,BUP] files.
 */
typedef struct {
  dvd_file_t *file;
  
  /* VMGI */
  vmgi_mat_t     *vmgi_mat;
  tt_srpt_t      *tt_srpt;
  pgc_t          *first_play_pgc;    
  ptl_mait_t     *ptl_mait;
  vts_atrt_t     *vts_atrt;
  txtdt_mgi_t    *txtdt_mgi;
  
  /* Common */
  pgci_ut_t      *pgci_ut;
  c_adt_t        *menu_c_adt;
  vobu_admap_t   *menu_vobu_admap;
  
  /* VTSI */
  vtsi_mat_t     *vtsi_mat;
  vts_ptt_srpt_t *vts_ptt_srpt;
  pgcit_t        *vts_pgcit;
  vts_tmapt_t    *vts_tmapt;
  c_adt_t        *vts_c_adt;
  vobu_admap_t   *vts_vobu_admap;
} ifo_handle_t;

#endif /* IFO_TYPES_H_INCLUDED */