IDiscFormat2Data::get_CurrentRotationTypeIsPureCAV method (imapi2.h)

Article
07/27/2022

Retrieves the current rotational-speed control used by the recorder.

Syntax

HRESULT get_CurrentRotationTypeIsPureCAV(
  [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_IMAPI_RECORDER_REQUIRED	The request requires a current disc recorder to be selected. Value: 0xC0AA0003
E_INVALIDARG	One or more arguments are not valid. Value: 0x80070057
E_POINTER	Pointer is not valid. Value: 0x80004003
E_FAIL	Unspecified failure. Value: 0x80004005
E_OUTOFMEMORY	Failed to allocate the required memory. Value: 0x8007000E
E_IMAPI_RECORDER_COMMAND_TIMEOUT	The device failed to accept the command within the timeout period. This may be caused by the device having entered an inconsistent state, or the timeout value for the command may need to be increased. Value: 0xC0AA020D
E_IMAPI_RECORDER_INVALID_RESPONSE_FROM_DEVICE	The device reported unexpected or invalid data for a command. Value: 0xC0AA02FF
E_IMAPI_RECORDER_MEDIA_UPSIDE_DOWN	The media is inserted upside down. Value: 0xC0AA0204
E_IMAPI_RECORDER_MEDIA_BECOMING_READY	The drive reported that it is in the process of becoming ready. Please try the request again later. Value: 0xC0AA0205
E_IMAPI_RECORDER_MEDIA_NO_MEDIA	There is no media in the device. Value: 0xC0AA0202
E_IMAPI_RECORDER_MEDIA_FORMAT_IN_PROGRESS	The media is currently being formatted. Please wait for the format to complete before attempting to use the media. Value: 0xC0AA0206
E_IMAPI_RECORDER_MEDIA_BUSY	The drive reported that it is performing a long-running operation, such as finishing a write. The drive may be unusable for a long period of time. Value: 0xC0AA0207
E_IMAPI_LOSS_OF_STREAMING	The write failed because the drive did not receive data quickly enough to continue writing. Moving the source data to the local computer, reducing the write speed, or enabling a "buffer underrun free" setting may resolve this issue. Value: 0xC0AA0300
E_IMAPI_RECORDER_MEDIA_INCOMPATIBLE	The media is not compatible or of unknown physical format. Value: 0xC0AA0203
E_IMAPI_RECORDER_DVD_STRUCTURE_NOT_PRESENT	The DVD structure is not present. This may be caused by incompatible drive/medium used. Value: 0xC0AA020E
E_IMAPI_RECORDER_NO_SUCH_MODE_PAGE	The device reported that the requested mode page (and type) is not present. Value: 0xC0AA0201
E_IMAPI_RECORDER_INVALID_MODE_PARAMETERS	The drive reported that the combination of parameters provided in the mode page for a MODE SELECT command were not supported. Value: 0xC0AA0208
E_IMAPI_RECORDER_MEDIA_WRITE_PROTECTED	The drive reported that the media is write protected. Value: 0xC0AA0209
E_IMAPI_RECORDER_MEDIA_SPEED_MISMATCH	The media's speed is incompatible with the device. This may be caused by using higher or lower speed media than the range of speeds supported by the device. Value: 0xC0AA020F
HRESULT_FROM_WIN32(ERROR_INVALID_HANDLE)	The specified handle is invalid. Value: 6
HRESULT_FROM_WIN32(ERROR_DEV_NOT_EXIST)	The specified network resource or device is no longer available. Value: 55
E_IMAPI_RECORDER_LOCKED	The device associated with this recorder during the last operation has been exclusively locked, causing this operation to failed. Value: 0xC0AA0210

Remarks

To retrieve the requested rotational-speed control, call the IDiscFormat2Data::get_RequestedRotationTypeIsPureCAV method.

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