DEVA DEVA028, Руководство пользователя

Страница: 35 / 49

3.5.4 chain_capture
result chain_capture (capture, dest)
Parameter Type Description
capture U32 The handle of the source capture stream to be
chained.
dest U32 The handle of the destination capture stream.
result U32 0 = Operation failed
1 = Operation completed
Chains the specified capture stream to a destination capture stream.
This function allows the application to ‘chain’ one capture stream to another. The
destination stream receives image capture data from the source capture stream rather
than directly from the camera. The image capture data is passed to the destination
stream after it has been processed by the source via a call to
copy_capture_buffer .
This facility is useful, if for example, it is required to retrieve the same image capture data
but with different formats or image adjustment settings.
3.5.5 capture_control
result capture_control (capture, control_type)
Parameter Type Description
capture U32 The handle of the capture stream.
control_type CAPTURE_CONTROL
_TYPES Specifies the required control as one of the
valid
CAPTURE_CONTROL_TYPES .
result U32 0 = Operation failed
1 = Operation completed
Controls the capture stream.
Valid CAPTURE_CONTROL_TYPES values passed in the control_type parameter allow
the application to play, pause, stop and single frame advance the capture stream.
In the case of a CAPTURE_IMMEDIATE stream a single image capture is triggered only
when play or frame advance is specified. The stream is effectively stopped by default.
In addition to image captures triggered by the probe input itself, image capture can also
be triggered on a
CAPTURE_ON_PROBE stream when play or frame advance is
specified. The stream may be stopped, so that no image captures are triggered when the
probe input is activated.
The application may play, pause and stop a CAPTURE_REPEAT stream. When the
stream is paused, frame advance triggers a single image capture.