- iOS 2.0+
- macOS 10.3+
- Mac Catalyst 13.0+
- tvOS 9.0+
An offset into the data from which to read.
The number of bytes to write.
A pointer to the buffer containing the data to write.
Upon completion, the callback should set this to a pointer to the number of bytes successfully written.
A result code. See Result Codes.
If you named your function
My, you would declare it like this:
This callback function is invoked when Audio File Services needs to write data.