Sound::SetFrequencyVariationCompletionCallback

Installs a completion callback function that is invoked when a frequency variation has completed.

void SetFrequencyVariationCompletionCallback(VariationCallback *callback, void *cookie = nullptr);

callback	The frequency variation completion callback function. This parameter may be nullptr, in which case the sound has no frequency variation completion callback function.
cookie	The cookie that is passed to the frequency variation completion callback function as its last parameter.

The SetFrequencyVariationCompletionCallback function installs a completion callback function that is invoked every time that a frequency variation operation completes for the sound for which it is installed. The VariationCallback type is defined as follows.

typedef void VariationCallback(Sound *, void *);

When the function pointed to by the callback parameter is called, the pointer to the sound object and the value supplied in the cookie parameter are passed to it. By default, there is no frequency variation completion callback function installed.

Sound::VaryFrequency

Sound::FrequencyVarying

Sound::SetVolumeVariationCompletionCallback