07.黃健興udf &iso9660 file system

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File System(ISO & UDF)File System(ISO & UDF)

主講人：黃健興E-Mail ： [email protected]

2003/5/24


Concept of DVD File SystemConcept of DVD File System


DVD File System &the related standardDVD File System &the related standard


UDF&ISO0660 Volume Space OverviewUDF&ISO0660 Volume Space Overview


Reference SpecificationReference Specification


ISO9660 & Micro UDFISO9660 & Micro UDF

• 使用 UDF Bridge v1.02 ，相容於 ISO9660 和 UDF v1.02

• ROM 碟片起始位址為 30000h• Path Table 與 Directory Record 固定從 offset 257

的地區開始擺放


File System on DiscFile System on Disc


Example of UDF File SystemExample of UDF File System

R oot

Sub1

Sub2

Sub2F ile1

Sub1F ile1

R ootF ile1

Lead-in Area

Volume Structure Area

F ile Set D escrip tor

F ile Entry (R oot D irectory IC B)

R oot D irectory F ile Identifie r D escrip tors : Sub1, R ootF ile1

F ile Entry (Sub1)

Sub1 F ile Identifie r D escrip tors : Sub2, Sub1F ile1

F ile Entry (Sub2)

F ile Entry (R ootF ile1)

F ile Entry (Sub1F ile1)

Sub2 F ile Identifie r D escrip tor : Sub2F ile1

F ile Entry (Sub2F ile1)

R ootF ile1

Sub1F ile1

Sub2F ile1


List of acronymsList of acronyms

• BP : Byte Position• RBP : Relative Byte Position• LBN : Logical Block Number• LSN : Logical Sector Number• PSN : Physical Sector Number• ID : Identifier• ICB : Information Control Block


Short Allocation DescriptorShort Allocation Descriptor

RBP Length Name Contents

0 4 Extent Length Uint32

4 4 Extent Position Uint32

short_ad


Long Allocation DescriptorLong Allocation Descriptor


0 4 Extent Length Uint32

4 6 Extent Position lb_addr10 6 Implementation Use bytes


0 4 Logical Block Number Uint32

4 2 Partition Reference Number

Uint16

lb_addr

long_ad


32-bit Numerical Value32-bit Numerical Value

Decimal Hex LB32

305419896 12 34 56 78 78 56 34 12

LB32 (Least significant byte first)

Decimal Hex MB32

305419896 12 34 56 78 12 34 56 78

MB32 (Most significant byte first)

Decimal Hex BB32

305419896 12 34 56 78 78 56 34 12 12 34 56 78

BB32 (Both-byte orders)


2.1 Requirements for DVD-ROM disc2.1 Requirements for DVD-ROM disc

1. Complies with UDF Bridge Format

( ISO9660 + UDF 1.02).

2. Logical sector and block size: 2048 bytes.

3. Anchor Volume Descriptor Pointers:

LSN = 256 (100h)

and

LSN = Last_LSN and/or (Last_LSN –256)


2.2.1 Physical Sector Layout2.2.1 Physical Sector Layout

Radius

PSN

030000h

(inner) (outer)

Lead-in area

Lead-out area

Data area

Information area

End_PSN

1. Single layer type


2.2.1 Physical Sector Layout (cont.)2.2.1 Physical Sector Layout (cont.)

2. Dual layer type with Parallel Track Path(PTP)

Layer 1 Layer 0

Radius

030000h

(inner) (outer)

Lead-in area

Lead-out area

Data area

Information area

PSN of both layer

End_PSN(0)End_PSN(1)


2.2.1 Physical Sector Layout (cont.)2.2.1 Physical Sector Layout (cont.)

3. Dual layer type with Opposite Track Path(OTP)

Radius

PSN

030000h

(inner) (outer)

Middle area

Data area

Information area

PSN of Layer 0

End_PSN(0)

End_PSN(0)

PSN of Layer 1End_PSN(1)

Lead-in area

Lead-out area


2.2.2 Logical Sector Assignment2.2.2 Logical Sector Assignment

1. Single layer type

Data Area

030000h PSN End_PSN

0 LSN Last_LSN

Volume Space

(inner) (outer)


2.2.2 Logical Sector Assignment (cont.)2.2.2 Logical Sector Assignment (cont.)

2. Dual layer type with Parallel Track Path(PTP)

Volume Space

030000h End_PSN(1)PSNPSN

Data Area Layer 0 Data Area Layer 1

0 LSN Last_LSN

030000h End_PSN(0)

(inner) (outer)(outer) (inner)


2.2.2 Logical Sector Assignment (cont.)2.2.2 Logical Sector Assignment (cont.)

3. Dual layer type with Opposite Track Path(OTP)

Volume Space

End_PSN(0) End_PSN(1)PSNPSN

Data Area Layer 0 Data Area Layer 1

0 LSN Last_LSN

030000h

End_PSN(0)

(inner) (inner)(outer) (outer)


2.2.3 Lead-in Area2.2.3 Lead-in Area

Initial zone ( All 00h)

Reference code zone

Buffer zone 1 (All 00h)

Control data zone

Buffer zone 2 (All 00h)

Data Area

PSN=0

Lead-in Area

PSN=2F000h (2 ECC blocks)



PSN=2FE00h (32 ECC block)

PSN=30000h ( LSN=0)


2.2.4 Control Data Zone2.2.4 Control Data Zone

Physical format information

Disc Manufacturing Information

Contents provider information

191 * Control_Data_Block

RPSN=0

Control Data Block

RPSN=1

RPSN=2~15

RPSN=16

Control Data Zone

RPSN=3071

192*16=3072 sectors


2.3 Volume Structure of UDF Bridge Format

2.3 Volume Structure of UDF Bridge Format

The volume structure of UDF Bridge format shall contain

1. A UDF Bridge Volume Recognition Sequence.

2. A Main Volume Descriptor Sequence.

3. A Reserve Volume Descriptor Sequence.

4. A Logical Volume Integrity Sequence.

5. Two Anchor Points.


Example of UDF Bridge Volume StructureExample of UDF Bridge Volume StructureLSN Structure LBN

0 to 15 Reserved 16 to 20 UDF Bridge

Volume Recognition Sequence 21 to 31 Reserved 32 to 47 Main Volume Descriptor Sequence 48 to 63 Reserve Volume Descriptor Sequence 64 to 65 Logical Volume Integrity Sequence

66 to 255 Reserved 256 First Anchor Point

257 to p-1 ISO9660 File Structure

Not Assigned

p to p+(q-1)

UDF File Structure 0 to q-1

p+q to Last LSN - 1

File Data Structure q to Last LBN

Last LSN Second Anchor Point


Example of UDF Bridge Volume Structure(cont.)

Example of UDF Bridge Volume Structure(cont.)

LSN Descriptors Structure LBN 0 to 15 Reserved(all 00h bytes)

16 Primary Volume Descriptor (ISO 9660)

17 Volume Descriptor set Terminator

18 Beginning Extended Area Descriptor

19 NSR Descriptor 20 Terminating Extended Area

Descriptor

UDF Bridge

Volume Recognition

Sequence

21 to 31 Reserved ( all 00h bytes )

Not Assigned


UDF Bridge Volume Structure(cont.)UDF Bridge Volume Structure(cont.)

LSN Descriptors Structure LBN 32 Primary Volume Descriptor

(UDF) 33 Implementation Use Volume

Descriptor 34 Partition Descriptor 35 Logical Volume Descriptor 36 Unallocated Space Descriptor 37 Terminating Descriptor

38 to 47 Trailing Logical Sector (all 00h bytes)

Main Volume

Descriptor Sequence

Not Assigned



LSN Descriptors Structure LBN 48 Primary Volume Descriptor

(UDF) 49 Implementation Use Volume

Descriptor 50 Partition Descriptor 51 Logical Volume Descriptor 52 Unallocated SpaceDescriptor 53 Terminating Descriptor

54 to 63 Trailing Logical Sector (all 00h bytes)

Reserve Volume

Descriptor Sequence

Not Assigned



LSN Descriptors Structure LBN 64 Logical Volume Integrity

Descriptor 65 Terminating Descriptor

Logical Volume Integrity Sequence

66 to 255 Reserved (all 00h bytes) 256 Anchor Volume

Descriptor Pointer First Anchor

Point 257 to

p-1 Path Table / Directory Record

ISO 9660 File Structure

Not Assigned



LSN Descriptors Structure LBN

p to p+q-1

File Set Descriptor/ Terminating Descriptor/ File Identifier Descriptor/ File Entery

UDF File Structure

0 to q-1

p+q to Last

LSN-1

UDF / ISO 9660 Files

File Data Structure

q to Last_LBN

Last LSN

Anchor Volume Descriptor Pointer

Second Anchor Point


3.1 Directory Structure3.1 Directory Structure

Example of Directory Structure

for DVD-Video and DVD-Audio

Root

VIDEO_TS

User defined

AUDIO_TS


3.1 Directory Structure (cont.)3.1 Directory Structure (cont.)

VIDEO_TS

VIDEO_TS.IFOVIDEO_TS.VOB

VTS_01_0.VOB

VTS_01_1.VOB

VIDEO_TS.BUP

VTS_01_0.IFO

VTS_01_2.VOB

VTS_01_0.BUP

(VMGI)

(VMGM_VOBS)

(VMGI_BUP)

(VTSI)

(VTSM_VOBS)

(VTS_TT_VOBS)

(VTS_TT_VOBS)

(VTSI_BUP)

VMG (Video Manager)

VTS #1 (Video Title Set)


3.1 Directory Structure (cont.)3.1 Directory Structure (cont.)

AUDIO_TS

AUDIO_TS.IFOAUDIO _TS.BUP

ATS_01_1.AOB

ATS_01_0.BUP

ATS_01_0.IFO

(AMGI)

(AMGI_BUP)

(ATSI)

(ATS_TT_AOBS)

(ATSI_BUP)

AMG (Audio Manager)

ATS (Audio Title

Set)


DVD VIDEO Disc (Elton John Love Songs)

Directory of J:\

VIDEO_TS <DIR> 10-14-97 0:58 VIDEO_TS

0 file(s) 0 bytes

1 dir(s) 0.00 MB free

Directory of J:\VIDEO_TS

. <DIR> 10-14-97 0:58 .

.. <DIR> 10-14-97 0:58 ..

VIDEO_TS BUP 12,288 10-14-97 0:58 VIDEO_TS.BUP

VIDEO_TS IFO 12,288 10-14-97 0:58 VIDEO_TS.IFO

VIDEO_TS VOB 507,904 10-14-97 0:58 VIDEO_TS.VOB

VMG


VTS_01_0 BUP 51,200 10-14-97 0:58 VTS_01_0.BUP

VTS_01_0 IFO 51,200 10-14-97 0:58 VTS_01_0.IFO

VTS_01_0 VOB 10,240 10-14-97 0:58 VTS_01_0.VOB

VTS_01_1 VOB 1,073,709,056 10-14-97 0:58 VTS_01_1.VOB

VTS_01_2 VOB 1,073,709,056 10-14-97 0:58 VTS_01_2.VOB

VTS_01_3 VOB 963,502,080 10-14-97 0:58 VTS_01_3.VOB

VTS_02_0 BUP 47,104 10-14-97 0:58 VTS_02_0.BUP

VTS_02_0 IFO 47,104 10-14-97 0:58 VTS_02_0.IFO

VTS_02_0 VOB 10,240 10-14-97 0:58 VTS_02_0.VOB

VTS_02_1 VOB 1,073,709,056 10-14-97 0:58 VTS_02_1.VOB

VTS_02_2 VOB 1,073,709,056 10-14-97 0:58 VTS_02_2.VOB

VTS_02_3 VOB 669,065,216 10-14-97 0:58 VTS_02_3.VOB

15 file(s) 5,653.53 MB

2 dir(s) 0.00 MB free

VTS #1

VTS #2


3.2 Example of UDF File Structure3.2 Example of UDF File Structure

LBN Descriptors Structure 0 File Set Descriptor File Set Descriptor Sequence 1 Terminating Descriptor 2 File Entry ( Root Directory ) Root ICB 3 File Identifier Descriptor ( parent directory ) File Identifier Descriptor ( VIDEO_TS ) Root Directory File Identifier Descriptor ( AUDIO_TS )

4 File Entry ( VIDEO_TS ) VIDEO_TS ICB 5 File Identifier Descriptor ( parent directory ) File Identifier Descriptor ( VIDEO_TS.IFO ) File Identifier Descriptor ( VIDEO_TS.VOB ) File Identifier Descriptor ( VIDEO_TS.BUP ) File Identifier Descriptor ( VTS_01_0.IFO ) VIDEO_TS Directory File Identifier Descriptor ( VTS_01_0.VOB ) File Identifier Descriptor ( VTS_01_1.VOB ) File Identifier Descriptor ( VTS_01_0.VOB ) File Identifier Descriptor ( VTS_01_0.BUP )


3.2 Example of UDF File Structure(cont.)

3.2 Example of UDF File Structure(cont.)

LBN Descriptors Structure 6 File Entry ( VIDEO_TS.IFO ) 7 File Entry ( VIDEO_TS.VOB ) 8 File Entry ( VIDEO_TS.BUP ) 9 File Entry ( VTS_01_0.IFO )

10 File Entry ( VTS_01_0.VOB ) 11 File Entry ( VTS_01_1.VOB ) 12 File Entry ( VTS_01_2.VOB ) 13 File Entry ( VTS_01_0.BUP )

VIDEO_TS Files ICB


Find UDF File Set DescriptorFind UDF File Set Descriptor

NSRDescriptor

NSRDescriptor

Partition Descriptor

Partition Descriptor

Volume Recognition

Sequence

ANCHORANCHOR

Volume Descriptor Sequence

Logical Volume

Descriptor

Logical Volume

Descriptor

File Set Descriptor

File Set Descriptor+P

LBN

How to define P


UDF File Reading ProcedureUDF File Reading Procedure

FSDFSD

FIDFID

FEFE

FIDFID

FIDFID

FIDFID

FEFE

FEFE

FEFE

FILEFILE

FEFE

FIDFID

FIDFID

FIDFID

Root Directory

ICB ICB ICB

Subdirectory

FEFE

FEFE

FEFE


UDF File Reading Procedure(cont.)UDF File Reading Procedure(cont.)


How to Read UDF Volume and File Structure

How to Read UDF Volume and File Structure

PROCEDURE 1. Volume Recognition Sequence

1. A volume recognition area shall start logical sector 16.

2. Find a NSR Descriptor in which the Standard Identifier field shall contain “NSR02”.


How to Read UDF Volume and File Structure (cont.)


PROCEDURE 2. Anchor Point

1. Read the first Anchor Point located at logical sector 256 which specifies the location of a Main Volume Descriptor Sequence.

2. If the first Anchor Point couldn’t be read, read the second Anchor Point located at Last LSN.




PROCEDURE 3. Volume Descriptor Sequence

1. Read the Main Volume Descriptor Sequence, if this sequence couldn’t be read, a Reserve Volume Descriptor Sequence should be read.

2. Find the location of a File Set Descriptor which is specified in a Logical Volume Descriptor of the sequence.

3. Find the partition starting location (p) which is specified in a Partition Descriptor of the sequence.




PROCEDURE 4. File Set Descriptor

1. Read the File Set Descriptor.

2. Find the location and length of a File Entry (FE) describing a root directory.




PROCEDURE 5. Root directory File Entry

1. Read the root directory File Entry.

2. Find the attributes and location of root directory.




PROCEDURE 6. Root directory

1. Read the root directory which is consist of File Identifier Descriptors(FID).

2. Find the File Identifier Descriptor in which a File Identifier field identifies VIDEO_TS and a File Characteristics field specifies that the file is a directory.

3. Read the File Identifier Descriptor and find the location of File Entry describing the VIDEO_TS directory.




PROCEDURE 7. File Entry of VIDEO_TS directory

1. Read the File Entry of VIDEO_TS directory.

2. Find the location and length of the VIDEO_TS directory.




PROCEDURE 8. VIDEO_TS directory

1. Read the VIDEO_TS directory, which consists of File Identifier Descriptors (FID).

2. Find the File Identifier Descriptor in which a File Identifier field identifies VIDEO_TS.IFO and File Characteristics field specifies that the file is not a directory.

3. Read the File Identifier Descriptor and find the location of a File Entry describing the VIDEO_TS.IFO file.




PROCEDURE 9. File Entry of VIDEO_TS.IFO

1. Read the File Entry of the VIDEO_TS.IFO .

2. Find the location of the VIDEO_TS.IFO file.


2.4 UDF Bridge Volume Recognition Sequence

2.4 UDF Bridge Volume Recognition Sequence

[Volume Recognition Sequence]{ <CD-ROM Volume Descriptor Set> 1

[Extended Area]{

<Beginning Extended Area Descriptor> 1{<Volume Structure Descriptor>|<Boot Descriptor>}

n+<Terminating Extended Area Descriptor> 1

} 1}


2.4.1 Beginning Extended Area Descriptor

2.4.1 Beginning Extended Area Descriptor

BP Length Field Name Contents 0 1 Structure Type Uint8 = 0 1 5 Structure Identifier bytes = “BEA01” 6 1 Structure Version Uint8 = 1 7 2041 Structure Data 00h bytes

Total = 2048 bytes


2.4.2 NSR Descriptor (Non-Sequential-Recording)

2.4.2 NSR Descriptor (Non-Sequential-Recording)

BP Length Field Name Contents 0 1 Structure Type Uint8 = 0 1 5 Structure Identifier bytes = “NSR02” 6 1 Structure Version Uint8 = 1 7 1 Reserved 00h byte 8 2040 Structure Data 00h bytes

Total = 2048 bytes


NSR Descriptor(LSN=13h)NSR Descriptor(LSN=13h)


2.4.3 Terminating Extended Area Descriptor

2.4.3 Terminating Extended Area Descriptor

BP Length Field Name Contents 0 1 Structure Type Uint8 = 0 1 5 Structure Identifier bytes = “TEA01” 6 1 Structure Version Uint8 = 1 7 2041 Structure Data 00h bytes

Total = 2048 bytes


2.5 Anchor Point2.5 Anchor Point

BP Length Field Name Contents 0 16 Descriptor Tag Tag ( Tag ID = 2 )

16 8 Main volume Descriptor Sequence Extent

extent_ad

24 8 Reserve Volume Descriptor Sequence Extent

extent_ad

32 480 Reserved 00h byte

Total = 512 bytes


Anchor Point(LSN=100h)Anchor Point(LSN=100h)


Descriptor Tag of Anchor PointDescriptor Tag of Anchor Point


2.6 Volume Descriptor Sequence2.6 Volume Descriptor Sequence

[Volume Descriptor Sequence Extent]{

<Volume Descriptor> 5

[Terminator]

{

<Terminating Descriptor>

}

<Trailing Logical Sector> 0+

}


2.6 Volume Descriptor Sequence (cont.)2.6 Volume Descriptor Sequence (cont.)

A volume descriptor shall be one of the following types :

1. Primary Volume Descriptor

2. Implementation Use Volume Descriptor

3. Partition Descriptor

4. Logical Volume Descriptor

5. Unallocated Space Descriptor


Descriptor TagDescriptor Tag

RBP Length Name Contents 0 2 Tag Identifier Uint16 (ECMA167/1/7.1.3) 2 2 Descriptor Version Uint16 4 1 Tag CheckSum Uint8 (ECMA167/1/7.1.1) 5 1 Reserved #00 byte 6 2 Tag Serial Number Uint16 8 2 Descriptor CRC Uint16

10 2 Descriptor CRC Length Uint16 12 4 Tag Location Uint32 (ECMA167/1/7.1.5)


Tag IdentifierTag Identifier

Tag_ID Interpretation 1 Primary Volume Descriptor ( ECMA167/3/10.1) 2 Anchor Volume Descriptor Pointer (ECMA167/3/10.2) 3 Volume Descriptor Pointer (ECMA167/3/10.3) 4 Implementation Use Volume Descriptor (ECMA167/3/10.4) 5 Partition Descriptor (ECMA167/3/10.5) 6 Logical Volume Descriptor (ECMA167/3/10.6) 7 Unallocated SpaceDescriptor (ECMA167/3/10.8) 8 Terminating Descriptor (ECMA167/3/10.9 and 4/14.2) 9 Logical Volume Integrity Descriptor (ECMA167/3/10.10)


2.6.1 Primary Volume Descriptor (UDF)

2.6.1 Primary Volume Descriptor (UDF)

BP Length Field Name Contents 0 16 Descriptor Tag Tag (Tag Identifier =1 )

16 4 Volume Descriptor Sequence Number

LB32

20 4 Primary Volume Descriptor Number LB32 24 32 Volume Identifier dstring 56 2 Volume Sequence Number LB16=1 (DVD-ROM) 58 2 Maximum Volume Sequence Number LB16=1 (DVD-ROM) 60 2 Interchange Level LB16=2 (DVD-ROM) 62 2 Maximum Interchange Level LB16=2 (DVD-ROM) 64 4 Character Set Identifier LB32=1 (UDF 2.2.2.3) 68 4 Maximum Character Set Identifier LB32=1 (UDF 2.2.2.3) 72 128 Volume Set Identifier dstring

200 64 Descriptor Character Set Charspec(UDF 2.1.2) 264 64 Explanatory Character Set Charspec(UDF 2.1.2)


2.6.1 Primary Volume Descriptor (UDF) (cont.)

2.6.1 Primary Volume Descriptor (UDF) (cont.)

BP Length Field Name Contents 328 8 Volume Abstract extent_ad 336 8 Volume Copyright Notice extent_ad 344 32 Application Identifier EntityID 376 12 Recording Date and Time timestamp 388 32 Implementation Identifier EntityID(see UDF 2.1.5) 420 64 Implementation Use bytes 484 4 Predecessor Volume Descriptor

Sequence Location LB32

488 2 Flags LB16 490 22 Reserved 00h bytes


Primary Volume Descriptor(LSN=20h)Primary Volume Descriptor(LSN=20h)


2.6.2 Implementation Use Volume Descriptor

2.6.2 Implementation Use Volume Descriptor

BP Length Field Name Contents 0 16 Descriptor Tag tag (Tag Identifier = 4 )


LB32

20 32 Implementation Identifier

EntityID (see UDF 2.1.5 and 2.2.7.1)

52 460 Implementation Use bytes (see 2.6.3)

Total = 512 bytes


2.6.3 Implementation Use field2.6.3 Implementation Use field

RBP Length Field Name Contents 0 64 LVI Charset Charspec (see UDF 2.1.2) 64 128 Logical VolumeIdentifier dstring

192 36 LV Info1 dstring 228 36 LV Info2 dstring 264 36 LV Info3 dstring 300 32 Implementation ID EntityID (see UDF 2.1.5) 332 128 Implementation Use bytes

Total = 460bytes


Implementation Use Volume Descriptor(LSN=21h)

Implementation Use Volume Descriptor(LSN=21h)


2.6.4 Partition Descriptor2.6.4 Partition Descriptor

BP Length Field Name Contents 0 16 Descriptor Tag Tag ( Tag Identifier = 5 )


LB32

20 2 Partition Flags LB16 22 2 Partition Number LB16 24 32 Partition Contents EntityID 56 128 Partition Contents Use Bytes

184 4 Access Type LB32 = 1 (DVD-ROM) 188 4 Partition Starting Location LB32 192 4 Partition Length LB32 196 32 Implementation Identifier EntityID 228 128 Implementation Use Bytes 356 156 Reserved 00h bytes


2.6.5 Partition Contents field2.6.5 Partition Contents field

RBP Length Field Name Contents 0 1 Flags Uint8 = 00000010b (DVD-ROM) 1 23 Identifier bytes = “+NSR02” (DVD-ROM)

24 8 Identifier Suffix bytes

Total = 32 bytes


2.6.6 Partition Header Descriptor of Partition Contents Use field

2.6.6 Partition Header Descriptor of Partition Contents Use field

RBP Length Field Name Contents 0 8 Unallocated Space Table Short_ad = all 0’s (DVD-ROM) 8 8 Unallocated Space Bitmap Short_ad = all 0’s (DVD-ROM)

16 8 Partition Integrity Table Short_ad = all 0’s (UDF 2.3.3.1) 24 8 Freed Space Table Short_ad = all 0’s (DVD-ROM) 32 8 Freed Space Bitmap Short_ad = all 0’s (DVD-ROM) 40 88 Reserved 00h bytes

Total = 128 bytes


Partition Descriptor(LSN=22h)Partition Descriptor(LSN=22h)


2.6.7 Logical Volume Descriptor2.6.7 Logical Volume DescriptorBP Length Field Name Contents 0 16 Descriptor Tag Tag(Tag Identifier = 6 ) 16 4 Volume Descriptor Sequence Number LB32 20 64 Descriptor Character Set charspec 84 128 Logical Volume Identifier dstring

212 4 Logical Block Size LB32 = 2048 216 32 Domain Identifier EntityID 248 16 Logical Volume Contents Use long_ad 264 4 Map Table Length LB32 = 6 268 4 Number of Partition Maps LB32 = 1 272 32 Implementation Identifier EntityID 304 128 Implementation Use bytes 432 8 Integrity Sequence Extent extent_ad 440 6 Partition Map(s) bytes


Logical Volume Descriptor (LSN=23h)Logical Volume Descriptor (LSN=23h)


2.6.8 Type 1 Partition Map2.6.8 Type 1 Partition Map

RBP Length Field Name Contents 0 1 Partition Map Type Uint8 = 1 (UDF2.2.4.6) 1 1 Partition Map Length Uint8 = 6 2 2 Volume Sequence Number LB16 = 1 (DVD-ROM) 4 2 Partition Number LB16

Total = 6 bytes


2.6.9 Unallocated Space Descriptor2.6.9 Unallocated Space Descriptor

BP Length Field Name Contents 0 16 Descriptor Tag tag ( Tag Identifier = 7 )


LB32

20 4 Number of Allocation Descriptor

LB32 = 0 (DVD-ROM)

24 0 Allocation Descriptors Extent_ad

Total = 24 bytes


2.6.10 Terminating Descriptor2.6.10 Terminating Descriptor

BP Length Field Name Contents 0 16 Descriptor Tag Tag ( Tag Identifier =8 )

16 496 Reserved 00h bytes

Total = 512 bytes


2.7 Logical Volume Integrity Sequence2.7 Logical Volume Integrity Sequence

[Logical Volume Integrity Descriptor Sequence Extent]

{

<Close Logical Volume Integrity Descriptor> 1+

[Terminator]

{

<Terminating Descriptor> | <empty logical sector>

} 0+

} 1


2.7.1 Logical Volume Integrity Descriptor2.7.1 Logical Volume Integrity Descriptor

BP Length Field Name Contents 0 16 Descriptor Tag Tag(Tag Identifier = 9 )

16 12 Recording Date timestamp 28 4 Integrity Type LB32 = 1(DVD-ROM) 32 8 Next Integrity Extent Extent_ad=0h(DVD-ROM) 40 32 Logical Volume Contents Use (2.7.2) bytes 72 4 Number of Partitions LB32 = 1(DVD-ROM) 76 4 Length of Implementation Use(L_IU) LB32 80 4 Free Space Table LB32 = 0(DVD-ROM) 84 4 Size Table LB32 88 L_IU Implementation Use (2.7.3) bytes

Total = 88+L_IU bytes


2.7.2 Logical Volume Header Descriptor of Logical Volume Contents Use field

2.7.2 Logical Volume Header Descriptor of Logical Volume Contents Use field

RBP Length Field Name Contents 0 8 Unique ID LB64 8 24 Reserved 00h bytes

Total = 32 bytes


2.7.3 Implementation Use field2.7.3 Implementation Use field

RBP Length Field Name Contents 0 32 Implementation ID Entity ID (UDF 2.1.5)

32 4 Number of Files LB32 36 4 Number of Directories LB32 40 2 Minimum UDF Read Revision LB16 42 2 Minimum UDF Write Revision LB16 44 2 Maximum UDF Write Revision LB16 46 a Implementation Use bytes

a = L_IU – 46

Total = L_IU bytes


2.8 CD-ROM Volume Descriptor Set2.8 CD-ROM Volume Descriptor Set

[CD-ROM Volume Descriptor Sequence]

{

<CD-ROM Volume Descriptor> 1+

[Terminator]

{

<Volume Descriptor Set Terminator> 1+

}

}


2.8 CD-ROM Volume Descriptor Set (cont.)

2.8 CD-ROM Volume Descriptor Set (cont.)

A CD-ROM Volume Descriptor shall be one of the following types:

1. Primary Volume Descriptor.

2. Supplementary Volume Descriptor.(ISO9660 8.5)

3. Volume Descriptor Set Terminator.

4. Boot Record.(ISO9660 8.2)

5. Volume Partition Descriptor.( ISO9660 8.6)


2.8.1 Primary Volume Descriptor (ISO9660)2.8.1 Primary Volume Descriptor (ISO9660)

BP Length Field Name Contents 0 1 Volume Descriptor Type UINT8 =1 1 5 Standard Identifier Bytes = “CD001” 6 1 Volume Descriptor Version UINT8 =1 7 1 Unused Field 00h bytes 8 32 System Identifier a-characters

40 32 Volume Identifier d-characters 72 8 Unused Field 00h bytes 80 8 Volume Space Size BB32 88 32 Unused Field 00h bytes


2.8.1 Primary Volume Descriptor (ISO9660) (cont.)


BP Length Field Name Contents 120 4 Volume Set Size BB16=1 (DVD-ROM) 124 4 Volume Sequence Number BB16=1 (DVD-ROM) 128 4 Logical Block Size BB16=2048 (DVD-ROM) 132 8 Path Table Size BB32 140 4 Location of Occurrence of Type

L Path Table LB32

144 4 Location of Optional Occurrence of Type L Path Table

LB32

148 4 Location of Occurrence of Type M Path Table

MB32

152 4 Location of Optional Occurrence of Type M Path Table

MB32




BP Length Field Name Contents 156 34 Directory Record for Root

Directory bytes

190 128 Volume Set Identifier d-characters 318 128 Publisher Identifier a-characters 446 128 Data Preparer Identifier a-characters 574 128 Application Identifier a-characters 702 37 Copyright File Identifier d-characters,

separator 1, separator 2 739 37 Abstract File Identifier d-characters,

separator 1, separator 2 776 37 Bibliographic File Identifier d-characters,

separator 1, separator 2




BP Length Field Name Contents 813 17 Volume Creation Date and Time Digits 830 17 Volume Modification Date and Time Digits 847 17 Volume Expiration Date and Time Digits 864 17 Volume Effective Date and Time Digits 881 1 File Structure Version Uint8 = 1 882 1 Reserved 00h bytes 883 512 Application Use Not specified


Total = 2048 bytes


Example of ISO9660 PVD(LBN=10h)Example of ISO9660 PVD(LBN=10h)


Volume Descriptor TypeVolume Descriptor Type

• 0 : Boot Record

• 1 : Primary Volume Descriptor

• 2 :Supplementary Volume Descriptor

• 3 :Volume Partition Descriptor

• 255 :Volume Descriptor Set Terminator


2.8.2 Volume Descriptor Set Terminator2.8.2 Volume Descriptor Set Terminator

BP Length Field Name Contents 0 1 Volume Descriptor Type Uint8 =255 1 5 Standard Identifier bytes = “CD001” 6 1 Volume Descriptor Version Uint8 = 1 7 2041 Reserved 00h bytes

Total = 2048 bytes


3.3 UDF File Set Descriptor Sequence3.3 UDF File Set Descriptor Sequence

[File Set Descriptor Sequence Extent]

{

<File Set Descriptor> 1

[Terminator]

{

<Terminating Descriptor > | <empty logical block >

} 0+

}


3.3.1 File Set Descriptor3.3.1 File Set Descriptor

BP Length Field Name Contents 0 16 Descriptor Tag tag(Tag ID = 256 ) 16 12 Recording Date and Time timestamp 28 2 Interchange Level LB16 = 3 30 2 Maximum Interchange Level LB16 = 3 32 4 Character Set List LB32 = 00000001h 36 4 Maximum Character Set List LB32 = 00000001h 40 4 File Set Number LB32 = 0 44 4 File Set descriptor Number LB32 = 0 48 64 Logical Volume Identifier

Character Set charaspec

112 128 Logical Volume Identifier dstring


3.3.1 File Set Descriptor (cont.)3.3.1 File Set Descriptor (cont.)

BP Length Field Name Contents 240 64 File Set Character Set charaspec 304 32 File Set Identifier dstring 336 32 Copyright File Identifier dstring 368 32 Abstract File Identifier dstring 400 16 Root Directory ICB long_ad 416 32 Domain Identifier EntityID 448 16 Next Extent long_ad = all 0’s 464 1584 Reserved 00h bytes

Total = 2048 bytes


File Set Descriptor (LSN=105h) page1File Set Descriptor (LSN=105h) page1


File Set Descriptor (LSN=105h) page2File Set Descriptor (LSN=105h) page2


3.3.2 Terminating Descriptor3.3.2 Terminating Descriptor

BP Length Field Name Contents 0 16 Descriptor Tag Tag ( Tag Identifier =8 )


Total = 512 bytes


3.4.1 File Identifier Descriptor3.4.1 File Identifier Descriptor

RBP Length Field Name Contents 0 16 Descriptor Tag tag ( Tag ID = 257 )

16 2 File Version Number LB16 = 1 18 1 File Characteristics Uint8 19 1 Length of File Identifier(=L_FI) Uint8 20 16 ICB long_ad 36 2 Length of Implementation Use

( L_IU ) LB16

38 L_IU Implementation Use EntityID a L_FI File Identifier d-characters b c Padding 00h bytes

a=L_IU+38

b=L_FI+L_IU+38

c=4*ip((L_FI+L_IU+38+3)/4)-( L_FI+L_IU+38)


3.5.1 File Entry3.5.1 File Entry

BP Length Field Name Contents 0 16 Descriptor Tag tag(Tag Identifier = 261)

16 20 ICB Tag (3.5.2) icbtag 36 4 Uid LB32 40 4 Gid LB32 44 4 Permissions (3.5.4) LB32 48 2 File Link Count LB16 50 1 Recorded Format Uint8 = 0 51 1 Recorded Display Attributes Uint8 = 0 52 4 Record Length LB32 = 0 56 8 Information Length LB64 64 8 Logical Block Recorded LB64


3.5.1 File Entry (cont.)3.5.1 File Entry (cont.)BP Length Field Name Contents 72 12 Access Time timestamp 84 12 Modification Time timestamp 96 12 Attribute Time timestamp

108 4 Checkpoint LB32=1 112 16 Extended Attribute ICB long_ad = all 0’s 128 32 Implementation Identifier EntityID 160 8 Unique Id LB64 168 4 Length of Extended Attributes

(L_EA) LB32 = 0

172 4 Length of Allocation Descriptors (L_AD)

LB32 = 8

176 L_EA Extended Attributes (3.6) bytes a L_AD Allocation Descriptors bytes

a = L_EA + 176


File Entry of Root Dir.(LSN=107h) page1File Entry of Root Dir.(LSN=107h) page1


File Entry of Root Dir.(LSN=107h) page2File Entry of Root Dir.(LSN=107h) page2


3.5.2 ICB Tag3.5.2 ICB Tag

RBP Length Field Name Contents 0 4 Prior Recorded Number of Direct Entries LB32 4 2 Strategy Type LB16 6 2 Strategy Parameter LB16 8 2 Maximum Number of Entries LB16

10 1 Reserved 00h bytes 11 1 File Type Uint8 12 6 Parent ICB Location lb_addr 18 2 Flags (see 3.5.3) LB16


3.5.3 Flags field in ICB Tag3.5.3 Flags field in ICB Tag

Bit Description Contents 0-2 Type of Allocation Descriptor 0 3 Directory Sort 0 4 Non-relocatable 0 or 1 5 Archive 0 or 1 6 Setuid 0 or 1 7 Setgid 0 or 1 8 Sticky 0 or 1 9 Contiguous 0 or 1

10 System 0 or 1 11 Transformed 0 12 Multi-versions 0

13-15 Reserved 0


3.5.4 Permissions field in File Entry3.5.4 Permissions field in File EntryBit Description Contents 0 Other Execute 0 or 1 1 Other Write 0 2 Other Read 0 or 1 3 Other Change Attribute 0 4 Other Delete 0 5 Group Execute 0 or 1 6 Group Write 0 7 Group Read 0 or 1 8 Group Change Attribute 0 9 Group Delete 0

10 Owner Execute 0 or 1 11 Owner Write 0 12 Owner Read 0 or 1 13 Owner Change Attribute 0 14 Owner Delete 0

15-31 Reserved 0


3.6.1 Extended Attribute Header Descriptor

3.6.1 Extended Attribute Header Descriptor

RBP Length Field Name Contents 0 16 Descriptor Tag tag(Tag ID = 262)

16 4 Implementation Attributes Location

LB32

20 4 Application Attributes Location LB32

Total = 24 bytes


3.6.2 Implementation Use Extended Attribute

3.6.2 Implementation Use Extended Attribute

RBP Length Field Name Contents 0 4 Attribute Type LB32 = 2048 4 1 Attribute Subtype Uint8 = 1 5 3 Reserved 00h bytes 8 4 Attribute Length LB32

12 4 Implementation Use Length LB32 16 32 Implementation Identifier EntityID(UDF2.1.5) 48 IU_L Implementation Use bytes


3.6.3 Free Extended Attribute Space of Implementation Use field

3.6.3 Free Extended Attribute Space of Implementation Use field

RBP Length Field Name Contents 0 2 Header Checksum (UDF 3.3.4.5) LB16 2 2 Free EA Space bytes = 0

Total = 4 bytes


3.6.4 Copyright Management Information of Implementation Use field

3.6.4 Copyright Management Information of Implementation Use field

RBP Length Field Name Contents 0 2 Header Checksum (UDF 3.3.4.5) LB16 2 1 CGMS Information byte 3 1 Data Structure Type Uint8 4 4 Protection System Information bytes

Total = 8 bytes


Root Directory(LSN=108h) page1Root Directory(LSN=108h) page1

Ref. p.80 3.4.1 File Identifier

Descriptor


File Entry of VIDEO_TS (LSN=109h) page1File Entry of VIDEO_TS (LSN=109h) page1


File Entry of VIDEO_TS (LSN=109h) page2File Entry of VIDEO_TS (LSN=109h) page2


VIDEO_TS Dir.(LSN=10Ah) page1VIDEO_TS Dir.(LSN=10Ah) page1


VIDEO_TS Dir.(LSN=10Ah) page2VIDEO_TS Dir.(LSN=10Ah) page2


File Entry:VIDEO_TS.IFO(LSN=10Ch) page1File Entry:VIDEO_TS.IFO(LSN=10Ch) page1


File Entry:VIDEO_TS.IFO(LSN=10Ch) page2File Entry:VIDEO_TS.IFO(LSN=10Ch) page2


VIDEO_TS.IFO(LSN=11Ah)VIDEO_TS.IFO(LSN=11Ah)


ISO9660 StructureISO9660 Structure


ISO9660 L-Type Path Table(LBN=16h)ISO9660 L-Type Path Table(LBN=16h)


ISO9660 M-Type Path Table(LBN=14h)

ISO9660 M-Type Path Table(LBN=14h)


ISO9660 Root Dir. Descriptor(LBN=18h)ISO9660 Root Dir. Descriptor(LBN=18h)


File FlagsFile Flags

• Bit 0 : Existence • Bit 1 : Directory• Bit 2 : Associated File• Bit 3 : Record • Bit 4 : Protection• Bit 5 ~6 : Reserved• Bit 7 : Multi-extent


ISO9660 Dir. Record(LBN=1Ah)ISO9660 Dir. Record(LBN=1Ah)


File(Makefile)(LBN=AAh)File(Makefile)(LBN=AAh)


3.7 ISO9660 Directory Structure and Path Table

3.7 ISO9660 Directory Structure and Path Table

LSN Contents Type L Path Table Record for Root Directory Type L Path Table Record for AUDIO_TS

257

Type L Path Table Record for VIDEO_TS

Type L Path Table

Type M Path Table Record for Root Directory Type M Path Table Record for AUDIO_TS

258

Type M Path Table Record for VIDEO_TS

Type M Path Table

Directory Record for Root Directory (1st) Directory Record for Root Directory (2 nd) Directory Record for AUDIO_TS

259

Directory Record for VIDEO_TS

Directory Records of

Root


3.7 ISO9660 Directory Structure and Path Table (cont.)


LSN Contents Directory Record for VIDEO_TS Directory Record for Parent Directory Directory Record for VIDEO_TS.BUP Directory Record for VIDEO_TS.IFO Directory Record for VIDEO_TS.VOB Directory Record for VTS_01_0.BUP Directory Record for VTS_01_0.IFO Directory Record for VTS_01_0.VOB Directory Record for VTS_01_1.VOB

260

Directory Record for VTS_01_2.VOB

Directory Records

of VIDEO_TS




LSN Contents Directory Record for AUDIO_TS Directory Record for Parent Directory Directory Record for ATS_01_0.BUP Directory Record for ATS_01_0.IFO Directory Record for ATS_01_1.AOB Directory Record for AUDIO_TS.BUP

261

Directory Record for AUDIO_TS.IFO

Directory Records

of AUDIO_TS


3.7.1 Directory Record3.7.1 Directory Record

RBP Length Field Name Contents 0 1 Length of Directory Record

(LEN_DR) Uint8

1 1 Extended Attribute Record Length Uint8 2 8 Location of Extent BB32

10 8 Data Length BB32 18 7 Recording Date and Time Numerical value 25 1 File Flags 8 bits 26 1 File Unit Size Uint8 27 1 Interleave Gap Size Uint8 28 4 Volume Sequence Number BB16 = 1


3.7.1 Directory Record (cont.)3.7.1 Directory Record (cont.)

RBP Length Field Name Contents 32 1 Length of File Identifier

(LEN_FI) Uint8

33 LEN_FI File Identifier d-characters, d1-characters, SEPARATOR 1, SEPARATOR 2, 00h or 01h byte

a b Padding 00h byte c d System Use (3.7.2) bytes

a = 33 + LEN_FI b = 0 if the length if the File Identifier field is an odd number. b = 1 if the length if the File Identifier field is an even number. c = a+b d = LEN_DR - c


3.7.2 Copyright Management Information of System Use field

3.7.2 Copyright Management Information of System Use field

Total = 6 bytes

RBP Length Field Name Contents 0 1 CGMS Information byte 1 1 Data Structure Type Uint8 2 4 Protection System Information bytes


3.7.3 Path Table Record3.7.3 Path Table Record

RBP Length Field Name Contents 0 1 Length of Directory Identifier

(LEN_DI) Uint8

1 1 Extended Attribute Record Length

Uint8

2 4 Location of Extent LB32 or MB32 6 2 Parent Directory Number LB16 or MB16 8 LEN_DI Directory Identifier d-characters,

d1-characters, 00h byte

a b Padding 00h byte

a = 8 + LEN_DI b = 0 if the Length of Directory Identifier field is even number. b = 1 if the Length of Directory Identifier field is an odd number.


ISO9660 File Reading Procedure(1)ISO9660 File Reading Procedure(1)

PTR (VIDEO_TS)PTR (VIDEO_TS)

PTR (Root)PTR (Root)PATH

TABLELocation

PATH TABLELocation

PTR (AUDIO_TS)PTR (AUDIO_TS)

Primary Volume

Descriptor

PATH TABLE

DR (VIDEO_TS)DR (VIDEO_TS)

DR (Parent)DR (Parent)

VIDEO_TS.IFOVIDEO_TS.IFO

DR (VIDEO_TS.BUP)DR (VIDEO_TS.BUP)

DR (VIDEO_TS.IFO)DR (VIDEO_TS.IFO)

DR (VIDEO_TS.VOB)DR (VIDEO_TS.VOB)

VIDEO_TS Directory

VIDEO_TS.VBOVIDEO_TS.VBO

VIDEO_TS.BUPVIDEO_TS.BUP

Files


ISO9660 File Reading Procedure(2)ISO9660 File Reading Procedure(2)

DRfor

Root Directory

DRfor

Root Directory

Primary Volume

Descriptor

DR (Root)DR (Root)

DR (Root)DR (Root)

VIDEO_TS.IFOVIDEO_TS.IFO

DR (AUDIO_TS)DR (AUDIO_TS)


Root Directory

VIDEO_TS.VBOVIDEO_TS.VBO


DR (Parent)DR (Parent)

DR (VIDEO_TS.BUP)DR (VIDEO_TS.BUP)

DR (VIDEO_TS.IFO)DR (VIDEO_TS.IFO)

DR (VIDEO_TS.VOB)DR (VIDEO_TS.VOB)

VIDEO_TS Directory

VIDEO_TS.BUPVIDEO_TS.BUP

Files


ISO9660 M-Type Path Table(LBN=102h)ISO9660 M-Type Path Table(LBN=102h)


File System Write CodeFile System Write Code

• Show UDF1.02 Write to Disc Source Code

• Show ISO9660 Write to Disc Source Code


Q&AQ&A

07.黃健興udf &iso9660 file system

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