IDMOQualityControl
This interface supports quality control on a Microsoft DirectX Media Object (DMO).
The following table shows the methods for IDMOQualityControl in the order the compiler calls them.
| Method | Description |
|---|---|
| SetNow | Specifies the earliest time stamp for which the DMO should deliver data. |
| SetStatus | Enables or disables quality control. |
| GetStatus | Determines whether quality control is active. |
The IDMOQualityControl interface, like all COM interfaces, inherits the IUnknown interface methods. The IUnknown interface supports the following three methods:
Remarks
A DMO exposes this interface if it can respond to late samples. When quality control is enabled, the DMO attempts to process samples on time, discarding late samples if necessary. When quality control is disabled, the DMO processes every sample. By default, quality control is disabled.
Applications use this interface to enable or disable quality control. Using quality control is appropriate when you are viewing media data in real time. If you are capturing data to a file, do not enable quality control because the DMO might discard samples. It does not matter in file capture whether samples arrive late and you do not want to lose the data.
To use quality control, perform the following steps:
- Call the IDMOQualityControl::SetNow method with the reference time of the earliest sample to be processed.
- Call the IDMOQualityControl::SetStatus method with the DMO_QUALITY_STATUS_ENABLED flag.
To disable quality control, call SetStatus with no flag.
Requirements
OS Versions: Windows CE .NET 4.1 and later.
Header: Dmo.h.
Link Library: Dmoguid.lib.
See Also
Last updated on Wednesday, April 13, 2005
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