internal static void ValidateState(AudioIOState curState, params AudioIOState[] desiredStates)
{
Debug.Assert(desiredStates.Length > 0);
if (desiredStates.Contains(curState))
{
return;
}
throw new InvalidOperationException($"The audio is not in a valid state. " +
$"Current State : { curState }, Valid State : { string.Join(", ", desiredStates) }.");
}
private void RegisterStateChangedCallback()
{
_stateChangedCallback = (IntPtr handle, int previous, int current, bool byPolicy, IntPtr _) =>
{
_state = (AudioIOState)current;
StateChanged?.Invoke(this,
new AudioIOStateChangedEventArgs((AudioIOState)previous, _state, byPolicy));
};
AudioIOUtil.ThrowIfError(
AudioInput.SetStateChangedCallback(_handle, _stateChangedCallback, IntPtr.Zero));
}
private void RegisterStateChangedCallback()
{
_stateChangedCallback = (IntPtr handle, int previous, int current, bool byPolicy, IntPtr _) =>
{
_state = (AudioIOState)current;
StateChanged?.Invoke(this,
new AudioIOStateChangedEventArgs((AudioIOState)previous, _state, byPolicy));
};
AudioOutput.SetStateChangedCallback(_handle, _stateChangedCallback, IntPtr.Zero)
.ThrowIfFailed("Failed to set state changed callback.");
}
internal AudioIOStateChangedEventArgs(AudioIOState previous, AudioIOState current, bool byPolicy)
{
Previous = previous;
Current = current;
ByPolicy = byPolicy;
}