Inside Macintosh: QuickTime Components /

Chapter 10 - Derived Media Handler Components / Derived Media Handler Components Reference

Functions / General Data Management

MediaSampleDescriptionChanged

The MediaSampleDescriptionChanged function allows the Movie Toolbox to inform your media handler that its SetMediaSampleDescription function has been called for a specified sample description.

pascal ComponentResult MediaSampleDescriptionChanged
                                          (ComponentInstance ci,
                                           long index);

ci

Identifies the Movie Toolbox's connection to your derived media handler.

index

Specifies the index of the sample description that has been changed.

DESCRIPTION

If your media handler caches sample description structures for any reason, it should support the MediaSampleDescriptionChanged function so that it will know when to update or invalidate the contents of that cache.

RESULT CODES

Any Component Manager result code