- 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 read.
A pointer to the buffer in which to put the data read.
On output, the callback should set this parameter to a pointer to the number of bytes successfully read.
A result code. See Result Codes.
If you named your function
My, you would declare it like this:
This callback function is called when Audio File Services needs to read data.