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Chapter 3 - Image Compression Manager / Image Compression Manager Reference

Image Compression Manager Functions / Working With Sequences

CDSequenceBusy

Your application may call the CDSequenceBusy function to check the status of an asynchronous compression or decompression operation.

pascal OSErr CDSequenceBusy (ImageSequence seqID);

seqID

Contains the unique sequence identifier that was returned by the DecompressSequenceBegin or CompressSequenceBegin function (described on page 3-107 and page 3-100, respectively).

DESCRIPTION

If there is no asynchronous operation in progress, the CDSequenceBusy function returns a 0 result code. If there is an asynchronous operation in progress, the result code is 1. Negative result codes indicate an error.

SPECIAL CONSIDERATIONS

If you call the CDSequenceEnd function (described in the next section), you don't need to call CDSequenceBusy to make sure you have completed an operation.

RESULT CODES

paramErr	-50	Invalid parameter specified
codecUnimpErr	-8962	Feature not implemented by this compressor

Component Manager errors