DVD-Video 解谜 - IFO文件 - VMG specific tables

Tables specific to the Video Manager IFO

TT_SRPT This table contains pointers to all the titles on the disk, and is indexed by VMG_TTN (title number within VMG) offset 0 1 2 3 4 5 6 7 0 number of titles reserved end address (last byte of last entry) 8... 12-byte entries each entry Offset size Contents 0 1 title type - see below 1 1 number of angles 2 2 number of chapters (PTTs) 4 2 parental management mask 6 1 Video Title Set number, VTSN 7 1 title number within VTS, VTS_TTN 8 4 start sector for VTS, referenced to whole disk (video_ts.ifo starts at sector 00000000) breakdown of Title Type 7 6 5 4 3 2 1 0 reserved 0=one_sequential_pgc 1=not one_sequential (random, shuffle, stills, loops, or more than one pgc) Jump/Link/Call commands 0000 None 0001 invalid 0011 only in button 0101 only in pre/post 0111 in button and pre/post 1001 only in cell 1011 in cell and button 1101 in cell and pre/post 1111 in all places Uop1 PTT play or search Uop0 Time play or search cell pre/post button exist

VMGM_PGCI_UT The VMGM_PGCI_UT contains a number of tables forming a heirarchy. Most entries are 8 bytes long.   VMGM_PGCI_UT     VMGM_LU       VMGM_PGC       :       VMGM_PGC     :   VMGM_LU       VMGM_PGC       :       VMGM_PGC     At the top is the VMGM_PGCI_UT which lists all the Language Units. offset 0 1 2 3 4 5 6 7 0 number of Language Units reserved end address (last byte of last PGC in last LU) relative to VMGM_PGCI_UT 8 ISO639 language code reserved for language code extension Menu existence flag 80 = title offset to VMGM_LU, relative to VMGM_PGCI_UT 10 ... possible additional entries Next, the VMGM_LU which lists all the Program Chains. offset 0 1 2 3 4 5 6 7 0 number of Program Chains reserved end address (last byte of last PGC in this LU) relative to VMGM_LU 8 PGC category, see below offset to VMGM_PGC, relative to VMGM_LU 10 ... possible additional entries breakdown of the PGC category byte 7 6 5 4 3 2 1 0 0 1=entry PGC reserved menu type (entry only) 2 = title 1   2 parental management mask 3 parental management mask On to PGC description

VMG_PTL_MAIT This table contains 16-bit masks for each title set in each of 8 parental levels, for each country code. VMG_PTL_MAIT   PTL_MAIT     :     PTL_MAIT     VMG_PTL_MAIT offset 0 1 2 3 4 5 6 7 0 number of countries number of title sets (Nts) end address (last byte of last PTL_MAIT) 8 country code   offset to PTL_MAIT   10 ... possible additional entries The VMG_PTL_MAIT is searched by country, and points to the table for each country. PTL_MAIT offset contents 0 Nts+1 16-bit masks (VMG + all title sets) for level 8 2*(Nts+1) Nts+1 16-bit masks (VMG + all title sets) for level 7 4*(Nts+1) Nts+1 16-bit masks (VMG + all title sets) for level 6 6*(Nts+1) Nts+1 16-bit masks (VMG + all title sets) for level 5 8*(Nts+1) Nts+1 16-bit masks (VMG + all title sets) for level 4 10*(Nts+1) Nts+1 16-bit masks (VMG + all title sets) for level 3 12*(Nts+1) Nts+1 16-bit masks (VMG + all title sets) for level 2 14*(Nts+1) Nts+1 16-bit masks (VMG + all title sets) for level 1 The PTL_MAIT contains the 16-bit masks for the VMG and all title sets for parental management level 8 followed by the masks for level 7, and so on to level 1.

VMG_VTS_ATRT This table contains copies of the menu and title attributes of all title sets. VMG_VTS_ATRT   VTS_ATRT     :     VTS_ATRT   VMG_VTS_ATRT offset 0 1 2 3 0 number of title sets   4 end address (last byte of last VTS_ATRT) 8 offset to VTS_ATRT 1 C ... possible additional entries VTS_ATRT offset size contents 0 4 end address (EA) 4 4 VTS_CAT (copy of offset 022-025 of the VTS IFO file)   0=unspecified, 1=Karaoke 8 EA-7 copy of VTS attributes (offset 100 and on from the VTS IFO file, usually 0x300 bytes long)