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Chapter 3 - Image Compression Manager / Image Compression Manager Reference

Image Compression Manager Functions / Changing Sequence-Decompression Parameters

SetDSequenceAccuracy

The SetDSequenceAccuracy function adjusts the decompression accuracy for the current sequence.

pascal OSErr SetDSequenceAccuracy (ImageSequence seqID, 
                                    CodecQ accuracy);

seqID

Contains the unique sequence identifier that was returned by the DecompressSequenceBegin function (described on page 3-107).

accuracy

Specifies the accuracy desired in the decompressed image. Values for this parameter are on the same scale as compression quality. See "Compression Quality Constants" beginning on page 3-57, for available values.

DESCRIPTION

The accuracy parameter governs how precisely the decompressor decompresses the image data. Some decompressors may choose to ignore some image data to improve decompression speed. A new accuracy parameter takes effect with the next frame in the sequence.

RESULT CODES

noErr	0	No error
paramErr	-50	Invalid parameter specified

SEE ALSO

You set the default accuracy value for a sequence with the accuracy parameter to the DecompressSequenceBegin function.