Gets the value for a specified property.
- macOS 10.5–10.11Deprecated
The HAL audio object to query.
The property whose value you want.
UInt32value indicating the size of the buffer pointed to by the
inparameter. Not all properties require qualification; in such a case you set this parameter to
A buffer of data to be used in determining the value of the property being queried. Not all properties require qualification; in such a case you set this parameter to
On input, a
UInt32value that indicates the size, in bytes, of the buffer pointed to by the
outparameter. On exit the size of the buffer that was used.
The buffer into which the HAL audio object will put the property value.
A result code.
Some Core Audio property values are C types and others are Core Foundation objects.
If you call this function to retrieve a value that is a Core Foundation object, then this function—despite the use of “Get” in its name—duplicates the object. You are responsible for releasing the object, as described in The Create Rule in Memory Management Programming Guide for Core Foundation.