AudioCodecGetPropertyInfo(_:_:_:_:)

Declaration

func AudioCodecGetPropertyInfo(_ inCodec: AudioCodec, _ inPropertyID: AudioCodecPropertyID, _ outSize: UnsafeMutablePointer<UInt32>?, _ outWritable: UnsafeMutablePointer<DarwinBoolean>?) -> OSStatus

Parameters

• inCodec:

  An audio codec object. Because an audio codec object is a Component Manger component instance, you can use the Component Manager (for example, the functions 1516552 Findnextcomponent and OpenAComponent) to obtain an audio codec object.

• inPropertyID:

  Property ID of the property about which you want to obtain information. Codec property IDs are listed in 1494121 Global Codec Properties and 1494111 Instance Codec Properties.

• outSize:

  On return, size in bytes of the current value of the property.

• outWritable:

  Returns true if you can change the value of the property, otherwise false.

Return Value

Returns NoErr if successful, otherwise, a result code. See Result Codes for a list of possible values.

Discussion

Call this function to:

• get the size of a property value before calling AudioCodecGetProperty(_:_:_:_:) to retrieve the value

• find out if a property value can be modified before calling AudioCodecSetProperty(_:_:_:_:) to set the value

See Also

Accessing Codec Properties

• AudioCodecGetProperty(_:_:_:_:)
• AudioCodecSetProperty(_:_:_:_:)