SGGetCompressBuffer(IM: QC)

Inside Macintosh: QuickTime Components /

Chapter 5 - Sequence Grabber Components / Sequence Grabber Components Reference

Sequence Grabber Component Functions / Working With Video Channels

SGGetCompressBuffer
The SGGetCompressBuffer function returns information about the filter buffer you have established for a video channel.
pascal ComponentResult SGGetCompressBuffer (SGChannel c, 
                                             short *depth, 
                                             Rect *compressSize);
c
Specifies the reference that identifies the channel for this operation. You obtain this reference from the SGNewChannel function, described on page 5-29.
depth
Contains a pointer to a field that is to receive the pixel depth of the filter buffer. If the returned value is set to 0, the sequence grabber is not filtering the input video data.
compressSize
Contains a pointer to a rectangle structure that is to receive the dimensions of the filter buffer. If the sequence grabber is not filtering the input video data, it returns an empty rectangle (all coordinates set to 0).

SEE ALSO
You set a filter buffer by calling the SGSetCompressBuffer function, which is described in the previous section.