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Custom Capability of The Saraff DirectX DS

The Saraff DirectX DS supports follows custom capabilities

private static class CustomCap {
    public const TwCap VideoDevices = (TwCap)0x9001;
    public const TwCap FrameWidth = (TwCap)0x9002;
    public const TwCap FrameHeight = (TwCap)0x9003;
    public const TwCap FrameBpp = (TwCap)0x9004;
    public const TwCap IsRunning = (TwCap)0x9005;
}

VideoDevices (0x9001)

Return list of video capture devices.

Type: TW_STR255 Supported Operations and Containers

• MSG_GET TW_ENUMERATION
• MSG_GETCURRENT TW_ONEVALUE
• MSG_GETDEFAULT TW_ONEVALUE
• MSG_SET TW_ONEVALUE

FrameWidth (0x9002)

Return list of frame widths for current video capture device

Type: TW_FIX32 Supported Operations and Containers

• MSG_GET TW_ENUMERATION
• MSG_GETCURRENT TW_ONEVALUE
• MSG_GETDEFAULT TW_ONEVALUE
• MSG_SET TW_ONEVALUE

FrameHeight (0x9003)

Return list of frame heights for current video capture device and current frame width

Type: TW_FIX32 Supported Operations and Containers

• MSG_GET TW_ENUMERATION
• MSG_GETCURRENT TW_ONEVALUE
• MSG_GETDEFAULT TW_ONEVALUE
• MSG_SET TW_ONEVALUE

FrameBpp (0x9004)

Return list of frame bpp (bits per pixel) for current video capture device, current frame width and current frame height

Type: TW_FIX32 Supported Operations and Containers

• MSG_GET TW_ENUMERATION
• MSG_GETCURRENT TW_ONEVALUE
• MSG_GETDEFAULT TW_ONEVALUE
• MSG_SET TW_ONEVALUE

IsRunning (0x9005)

Return true if current video capture device is running; otherwise false

Type: TW_BOOL Supported Operations and Containers

• MSG_GET TW_ENUMERATION
• MSG_GETCURRENT TW_ONEVALUE
• MSG_GETDEFAULT TW_ONEVALUE
• MSG_SET TW_ONEVALUE

Saraff.Twain.CapSample

Figure 1 - Saraff.Twain.CapSample application

For making snapshot you must click to the Acquire button (on toolstrip panel) and then press shutter button (on camera)