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CoreMedia Changes

CoreMedia

CMFormatDescription.h
Added CMVideoFormatDescriptionCreateFromH264ParameterSets()
Added CMVideoFormatDescriptionGetH264ParameterSetAtIndex()
Added kCMFormatDescriptionError_ValueNotAvailable
Added kCMMPEG2VideoProfile_XF
CMSampleBuffer.h
Added CMSampleBufferCopyPCMDataIntoAudioBufferList()
CMSync.h
Added kCMTimebaseNotificationKey_EventTime
CMTextMarkup.h
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