VideoControlFlags Enumeration

Specifies the video mode of operation for a video device.

Syntax

typedef enum tagVideoControlFlags
{
    VideoControlFlag_FlipHorizontal        = 0x0001,
    VideoControlFlag_FlipVertical          = 0x0002,
    VideoControlFlag_ExternalTriggerEnable = 0x0004,
    VideoControlFlag_Trigger               = 0x0008
} VideoControlFlags;

Elements

VideoControlFlag_FlipHorizontal

Specifies that the picture is flipped horizontally.

VideoControlFlag_FlipVertical

Specifies that the picture is flipped vertically.

VideoControlFlag_ExternalTriggerEnable

Sets up a stream to capture a trigger from an external source, for example, a push button on a camera. Buffers can be queued to the driver but will not be passed up from the WDM capture driver (for compression, display, or writing to a file) until the external event happens. See Remarks.

VideoControlFlag_Trigger

In software, simulates an external trigger when the stream has the VideoControlFlag_ExternalTriggerEnable flag set.

Remarks

The IAMVideoControl interface uses this enumerated data type.

Multiple capture buffers are queued to a capture driver and are filled at a fixed rate once the stream is put into the "run" state. If the VideoControlFlag_ExternalTriggerEnable flag is set, a filled buffer is not passed up from the WDM capture driver for compression, display, or writing to a file until the external event happens.

See Also

• DirectShow Enumerated Types