Mac Developer Library

Developer

IODVDMedia Class Reference

Options
Deployment Target:

On This Page

IODVDMedia

The IODVDMedia class is a random-access disk device abstraction for DVDs.

The IODVDMedia class is a random-access disk device abstraction for DVDs.

  • Declaration

    virtual IOReturn getSpeed( UInt16 *kilobytesPerSecond);

    Parameters

    kilobytesPerSecond

    Returns the current speed used for data transfers, in kB/s.

    kDVDSpeedMin specifies the minimum speed for all DVD media (1X). kDVDSpeedMax specifies the maximum speed supported in hardware.

    Return Value

    Returns the status of the operation.

    Discussion

    Get the current speed used for data transfers.

  • Declaration

    virtual IOReturn readDiscInfo( IOMemoryDescriptor *buffer, UInt16 *actualByteCount );

    Parameters

    buffer

    Buffer for the data transfer. The size of the buffer implies the size of the data transfer.

    actualByteCount

    Returns the actual number of bytes transferred in the data transfer.

    Return Value

    Returns the status of the data transfer.

    Discussion

    Issue an MMC READ DISC INFORMATION command.

  • Declaration

    virtual IOReturn readRZoneInfo( IOMemoryDescriptor *buffer, UInt32 address, DVDRZoneInfoAddressType addressType, UInt16 *actualByteCount );

    Parameters

    buffer

    Buffer for the data transfer. The size of the buffer implies the size of the data transfer.

    address

    As documented by MMC.

    addressType

    As documented by MMC.

    actualByteCount

    Returns the actual number of bytes transferred in the data transfer.

    Return Value

    Returns the status of the data transfer.

    Discussion

    Issue an MMC READ RZONE INFORMATION (READ TRACK INFORMATION) command.

  • Declaration

    virtual IOReturn readStructure( IOMemoryDescriptor *buffer, const DVDStructureFormat format, const UInt32 address, const UInt8 layer, const UInt8 grantID );

    Parameters

    buffer

    Buffer for the data transfer. The size of the buffer implies the size of the data transfer.

    format

    As documented by MMC.

    address

    As documented by MMC.

    layer

    As documented by MMC.

    grantID

    As documented by MMC.

    Return Value

    Returns the status of the data transfer.

    Discussion

    Issue an MMC READ DVD STRUCTURE command.

  • Declaration

    virtual IOReturn reportKey( IOMemoryDescriptor *buffer, const DVDKeyClass keyClass, const UInt32 address, const UInt8 grantID, const DVDKeyFormat format );

    Parameters

    buffer

    Buffer for the data transfer. The size of the buffer implies the size of the data transfer. Pass null for the kDVDKeyFormatAGID_Invalidate format case.

    keyClass

    As documented by MMC.

    address

    As documented by MMC.

    grantID

    As documented by MMC.

    format

    As documented by MMC.

    Return Value

    Returns the status of the data transfer.

    Discussion

    Issue an MMC REPORT KEY command.

  • Declaration

    virtual IOReturn sendKey( IOMemoryDescriptor *buffer, const DVDKeyClass keyClass, const UInt8 grantID, const DVDKeyFormat format );

    Parameters

    buffer

    Buffer for the data transfer. The size of the buffer implies the size of the data transfer. Pass null for the kDVDKeyFormatAGID_Invalidate format case.

    keyClass

    As documented by MMC.

    grantID

    As documented by MMC.

    format

    As documented by MMC.

    Return Value

    Returns the status of the data transfer.

    Discussion

    Issue an MMC SEND KEY command.

  • Declaration

    virtual IOReturn setSpeed( UInt16 kilobytesPerSecond);

    Parameters

    kilobytesPerSecond

    Speed to be used for data transfers, in kB/s.

    kDVDSpeedMin specifies the minimum speed for all DVD media (1X). kDVDSpeedMax specifies the maximum speed supported in hardware.

    Return Value

    Returns the status of the operation.

    Discussion

    Set the speed to be used for data transfers.