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QuickTime 4 Reference

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Handling and Delegating Other Calls

Your image decompressor component must delegate the following image decompressor component calls to the base image decompressor:

• ImageCodecPreDecompress
• ImageCodecBandDecompress
• ImageCodecBusy
• ImageCodecFlush

If the ImageSubCodecDecompressRecord structure specifies a progress function, your image decompressor component must also delegate these decompressor component calls to the base image decompressor:

• codecProgressOpen
• codecProgressClose

Your image decompressor component can implement any other image decompressor component functions itself or delegate any of the calls to the base image decompressor. To delegate calls, it uses the DelegateComponentCall function.

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