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 - VMG IFO ONLY, 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]
    - pgc_program_map_t program_map - PGC program map (simple typedef of uint8_t)
    - cell_playback_t cell_playback
      - block_mode
      - block_type
      - seamless_play
      - interleaved
      - stc_discontinuity
      - seamless_angle
      - playback_mode
      - restricted
      - unknown2
      - still_time
      - cell_cmd_nr
      - dvd_time_t playback_time
        
        hour
        
        minute
        
        second
        
        frame_u
      - first_sector
      - first_ilvu_end_sector
      - last_vobu_start_sector
      - last_sector
    - cell_position_t cell_position - cell position information
      - vob_id_nr
      - zero_1
      - cell_nr
    - ref_count
  - ptl_mait_t ptl_mait - VMG IFO ONLY, 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 - VMG IFO ONLY, 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 - sub-picture attributes (see above)
      - subp_attr_t zero_5[27]
      - zero_6[2]
      - video_attr_t vtstt_vobs_video_attr
      - zero_7
      - nr_of_vtstt_audio_streams
      - audio_attr_t vtstt_audio_attr[8]
      - zero_8[16]
      - zero_9
      - nr_of_vtstt_subp_streams
      - subp_attr_t - vtstt_subp_attr[32]
    - vts_atrt_offsets - offsets table for each vts_attributes
  - txtdt_mgi_t txtdt_mgi - VMG IFO ONLY, Text Data Manager Information
    - disc_name[14] - ?
    - nr_of_language_units - number of language units
    - last_byte
    - txtdt_lu_t lu - language unit
      - lang_code
      - unknown
      - txtdt_start_byte - prt, rel start of vmg_txtdt_mgi
      - txtdt_t txtdt
        
        last_byte
        
        offsets[100]
  - pgci_ut_t pgci_ut - VMG AND VTS, Menu PGCI Unit Table
    - nr_of_lus - number of language units
    - zero_1
    - last_byte
    - pgci_lu_t lu - Menu PGCI Language Unit
      - lang_code
      - lang_extension
      - exists
      - lang_start_byte
      - pgcit_t pgcit - Program Chain Information Table
        
        nr_of_pgci_srp
        
        zero_1
        
        last_byte
        
        pgci_srp_t pgci_srp - Program Chain Information Search Pointer
        
        entry_id
        
        block_mode
        
        block_type
        
        unknown1
        
        ptl_id_mask
        
        pgc_start_byte
        
        pgc_t pgc (see above)
        
        ref_count
  - c_adt_t menu_c_adt - VMG and VTS IFOs, Cell Address Table
    - nr_of_vobs - number of VOBs (max 99)
    - zero_1
    - last_byte
    - cell_adr_t cell_adr_table
      - vob_id
      - cell_id
      - zero_1
      - start_sector
      - last_sector
  - vobu_admap_t menu_vobu_admap - VMG and VTS IFOs, VOBU Address Map
    - last_byte
    - vobu_start_sectors
  - vtsi_mat_t vtsi_mat - VTS IFOs only, Video Title Set Information Management Table
    - vts_identifier[12] - VTS identifier
    - vts_last_sector - last sector of VTS (BUP)
    - zero_1[12] - reserved / unknown
    - vtsi_last_sector - last sector of VTS IFO
    - zero_2
    - specification_version
    - vts_category - VTS category
      - 0: unspecified
      - 1: karaoke
    - zero_3
    - zero_4
    - zero_5
    - zero_6[19]
    - zero_7
    - zero_8[32]
    - zero_9
    - zero_10[24]
    - vtsi_last_byte - last byte of VTS IFO
    - zero_11
    - zero_12[56]
    - vtsm_vobs - starting sector of VTS Menu VOBs
    - vtstt_vobs - starting sector of table of titles
  - vts_ptt_srpt_t vts_ptt_srpt - VTS IFOs only, Part of Title Search Pointer Table
    - nr_of_srpts
    - zero_1
    - last_byte
    - ttu_t title
    - ttu_offset
  - pgcit_t vts_pgcit - VTS IFOs only, Program Chain Information Table (see above)
  - vts_tmapt_t vts_tmapt - VTS IFOs only, time maps for each PGC
    - nr_of_tmaps - number of program chains
    - zero_1
    - last_byte - end address (last byte of last VTS_TMAP)
    - vts_tmap_t tmap
      - tmu - time unit, in seconds
      - zero_1 - reserved / unknown / safe to ignore
      - nr_of_entries - number of entries in map; 0 for empty map
      - map_ent_t map_ent - time map entry (typedef as uint32_t)
  - c_adt_t vts_c_adt VTS IFOs only, VTS cell address table
  - vobu_admap_t vts_vobu_admap
- VMGM
  - VIDEO_TS.VOB

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