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libdvdread

VMG - Video Manager Group
ifo_handle_t ifofile
- dvd_file_t file
- vmgi_mat_t vmgi_mat - VMGI - Video Manager Group IFO (VIDEO_TS.IFO, VIDEO_TS.BUP)
  - vmg_identifier[12] - DVDVIDEO-VMG
  - vmg_last_sector - last sector of VMG set (last sector of VIDEO_TS.BUP)
  - zero_1[12] - reserved / unknown
  - vmgi_last_sector last sector of VIDEO_TS.IFO
  - zero_2 - reserved / unknown
  - specification_version - version number
  - vmg_category - VMG category; byte1=prohibited region mask
  - vmg_nr_of_volumes - number of volumes, as in physical sets of discs (metadata)
  - vmg_this_volume_nr - volume number this disc belongs to (metadata)
  - disc_side - physical side of this disc (metadata)
  - zero_3[19] - reserved / unknown
  - vmg_nr_of_title_sets - number of title sets (VTS, or non-VMG IFOs)
  - provider_identifier - 32 character string of provider id (metadata), usually blank
  - vmg_pos_code - VMG POS (?)
  - zero_4[24] - reserved / unknown
  - vmgi_last_byte - end byte address of VMGI_MAT
  - first_play_pgc - start address of FP_PGC, the first, and only, and optional PGC for this (VMG) IFO
  - zero_5[56] - reserved / unknown
  - vmgm_vobs - starting sector of Menu VOB
  - tt_srpt - starting sector of table of titles, TT_SRPT
  - vmgm_pgci_ut - starting sector of menu program chain table, VMGM_PGCI_UT
  - ptl_mait - starting sector of parental management masks, VMG_PTL_MAIT
  - vts_atrt - starting sector of audio, subtitle attributes, VMG_VTS_ATRT
  - txtdt_mgi - starting sector of text data, VMG_TXTDT_MG
  - vmgm_c_adt - starting sector of menu cell address table, VMGM_C_ADT
  - vmgm_vobu_admap - starting sector of menu VOBU address map, VMGM_VOBU_ADMAP
  - zero_6[32] - reserved / unknown
  - video_attr_t vmgm_video_attr - VMG VOBs video attributes
    - mpeg_version - MPEG version
      - 0: MPEG-1
      - 1: MPEG-2
    - video_format - Video format
      - 0: NTSC
      - 2: PAL
    - display_aspect_ratio - aspect ratio
      - 0: 4:3
      - 1: reserved
      - 2: reserved
      - 3: 16:9
    - permitted_df - permitted display formats (?)
    - line21_cc_1 - CC for line 21 field 1 in GOP (NTSC only)
    - line21_cc_2 - CC for line 22 field 1 in GOP (NTSC only)
    - unknown1 - reserved / unknown
    - bit_rate - ?
    - picture_size - video resolution
      - If format is NTSC:
        
        0: 720×480
        
        1: 704×480
        
        2: 352×480
        
        3: 352×240
      - If format is PAL:
        
        0: 720×576
        
        1: 704×576
        
        2: 352×576
        
        3: 352×288
    - letterboxed
      - 0: no
      - 1: yes
    - film_mode (if PAL)
      - 0: camera
      - 1: film
  - zero_7 - reserved / unknown
  - nr_of_vmgm_audio_streams - number of audio streams in VMG VOBS, must be 0 or 1
  - audio_attr_t vmgm_audio_attr - VMG VOBs audio attributes
    - audio_format - audio codec
      - 0: AC3 (Dolby Digital)
      - 1: unknown
      - 2: MPEG-1
      - 3: MPEG-2EXT
      - 4: LPCM
      - 5: unknown
      - 6: DTS
      - 7: unknown
    - multichannel_extension - multichannel extension exists or not for karaoke mode
    - lang_type - language type (?)
      - 0: unspecified
      - 1: “per bytes 2&3” (DVD info spec)
    - application_mode (?)
      - 0: unspecified
      - 1: karaoke
      - 2: surround
    - quantization - quantization / dynamic range control (DRC)
      - If audio codec is MPEG-1 (2) or MPEG2-EXT (3), then
        
        0: No DRC
        
        1: DRC
      - If audio codec is LPCM (4), then
        
        0: 16 bps
        
        1: 20 bps
        
        2: 24 bps
    - sample_frequency - sample rate
      - 0: 48 Kbps
    - unknown1 - reserved / unknown
    - channels - number of audio channels, 6 (5.1 surround sound) is maximum
    - lang_code - language code
    - lang_extension - reserved for language code extension
    - code_extension - code extension
      - 0: unspecified
      - 1: normal
      - 2: for visually impaired
      - 3: director's comments
      - 4: alternate director's comments
    - unknown3 - reserved / unknown
  - audio_attr_t zero_8[7] - reserved for audio streams, max 8
  - zero_9[17] - reserved / unknown
  - nr_of_vmgm_subp_streams - number of sub-picture streams in VMG VOBS, must be 0 or 1
  - subp_attr_t vmgm_subp_attr - VMG VOBs sub-picture attributes
    - code_mode - coding mode
      - 0: run length
      - 1: extended
      - 2: other
    - zero1 - reserved / unknown / ignored
    - type - language type
      - 0: unspecified
      - 1: language
      - 2: other
    - zero2 - reserved / unknown / ignored
    - lang_code - language code
    - lang_extension - language code extension
    - code_extension - code extension
  - subp_attr_t zero_10[27] - reserved / unknown
- tt_srpt_t tt_srpt - VMG IFO ONLY, pointers to all the tables on the disk
  - nr_of_srpts - number of titles
  - zero_1 - reserved
  - last_byte - end address, last byte of last entry
  - title_info_t title
    - playback_type_t pb_ty
      - zero_1
      - multi_or_random_pgc_title
      - jlc_exists_in_cell_cmd
      - jlc_exists_in_prepost_cmd
      - jlc_exists_in_button_cmd
      - jlc_exists_in_tt_dom
      - chapter_search_or_play
      - title_or_time_play
    - nr_of_angles - number of angles
    - nr_of_ptts - number of chapters (PTTs)
    - parental_id - parental management mask
    - title_set_nr - VTS number (VTSN)
    - vts_ttn - title number within VTS, VTS_TTN
    - title_set_sector - starting sector for VTS
  - pgc_t first_play_pgc - first (and only possible) PGC for VMG IFO
    - zero_1 - reserved / unused
    - nr_of_programs - number of programs
    - nr_of_cells number of cells
    - dvd_time_t playback_time
      - hour
      - minute
      - second
      - frame_u - the two high bits are the framerate
    - user_ops_t prohibited_ops
      - (skipping display of user_ops_t here, see source code)
    - audio_control[8] - audio stream control
    - subp_control[32] - sub-picture stream control
    - next_pgc_nr - next PGCN
    - prev_pgc_nr - previous PGCN
    - goup_pgc_nr - group PGCN
    - still_time - PGC still time, 255 = infinite
    - pg_playback_mode - PG playback mode, 0=sequential, otherwise bit7 indicates random (0) or shuffle (1), and the program count is in bits6-0
    - palette[16] - palette (0, Y, Cr, Cb)
    - command_tbl_offset - offset within PGC to commands
    - program_map_offset - offset within PGC to program map
    - cell_playback_offset - offset within PGC to cell playback information table
    - cell_position_offset - offset within PGC to cell position information table
    - pgc_command_tbl_t command_tbl
      - nr_of_pre - number of pre commands
      - nr_of_post - number of post commands
      - nr_of_cell - number of cell commands
      - zero_1 - end address relative to command table
      - vm_cmd_t pre_cmds
        
        bytes[8]
      - vm_cmd_t post_cmds
        
        bytes[8]
      - vm_cmd_t cell_cmds
        
        bytes[8]
  - ptl_mait_t ptl_mait - parental management information table
    - nr_of_countries - number of countries
    - nr_of_vtss - number of title sets
    - last_byte - end address, last byte of PTL_MAIT
    - ptl_mait_country_t countries
      - country_code
      - zero_1
      - pf_ptl_mai_start_byte
      - zero_2
      - pf_level_t pf_ptl_mai
  - vts_atrt_t vts_atrt - VTS Attribution Table
    - nr_of_vtss - number of title sets
    - zero_1
    - last_byte - end address (last byte of last VTS_ATRT)
    - vts_attributes_t vts - VTS attributes
      - last_byte - end address
      - vts_cat
      - video_attr_t vtsm_vobs_attr - video attributes (see above)
      - nr_of_vtsm_audio_streams - limited to maximum of 1 for VMG IFO
      - audio_attr_t vtsm_audio_attr - audio attributes (see above)
      - audio_attr_t zero_2[7]
      - zero_3[16]
      - zero_4
      - nr_of_vtsm_subp_streams - number of sub-picture streams
      - subp_attr_t vtsm_subp_attr
- VMGM
  - VIDEO_TS.VOB

VMG
- vmgi_mat_t
- playback_type_t
- title_info_t
- tt_srpt_t
- pf_level_t
- ptl_mait_country_t
- ptl_mait_t
- vts_attributes_t
- vts_atrt_t
- txtdt_t
- txtdt_lu_t
- txtdt_mgi_t
VTS
- vtsi_mat_t
- ptt_info_t
- ttu_t
- vts_ptt_srpt_t
- map_ent_t
- vts_tmap_t
- vts_tmapt_t
All IFOs
- ifo_handle_t

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;

Trace: • libdvdread

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