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IWriteSpeedDescriptor::get_RotationTypeIsPureCAV method (imapi2.h)

  • Article

Retrieves the supported rotational-speed control used by the recorder for the current media.

Syntax

HRESULT get_RotationTypeIsPureCAV(
  [out] VARIANT_BOOL *value
);

Parameters

[out] value

Is VARIANT_TRUE if constant angular velocity (CAV) rotational-speed control is in use. Otherwise, VARIANT_FALSE to indicate that another rotational-speed control that the recorder supports is in use.

Return value

S_OK is returned on success, but other success codes may be returned as a result of implementation. The following error codes are commonly returned on operation failure, but do not represent the only possible error values:

Return code Description
E_POINTER
 Pointer is not valid.

Value: 0x80004003

Remarks

Rotational-speed control types include the following:

  • CLV (Constant Linear Velocity). The disc is written at a constant speed. Standard rotational control.
  • CAV (Constant Angular Velocity). The disc is written at a constantly increasing speed.
  • ZCAV (Zone Constant Linear Velocity). The disc is divided into zones. After each zone, the write speed increases. This is an impure form of CAV.
  • PCAV (Partial Constant Angular Velocity). The disc speed increases up to a specified velocity. Once reached, the disc spins at the specified velocity for the duration of the disc writing.

Requirements

Requirement Value
Minimum supported client Windows Vista, Windows XP with SP2 [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header imapi2.h

See also

IWriteSpeedDescriptor