public void CreateTokenByAddingParameterRecordingObserver()
{
TestRuntime.AssertXcodeVersion(7, 0);
const ulong address = 0;
const float newValue = 10f;
bool recordingObserverInvoked = false;
var completion = new ManualResetEvent(false);
using (var parameter = CreateAUParameter()) {
using (var tree = AUParameterTree.CreateTree(new AUParameterNode[] { parameter })) {
Exception ex = null;
var recordingObserver = tree.CreateTokenByAddingParameterRecordingObserver((nint numberOfEvents, ref AURecordedParameterEvent events) => {
try {
Assert.True(numberOfEvents == 1,
$"Number of events was wrong. Expected {1} but was {numberOfEvents}");
Assert.True(events.Address == address,
$"Address was wrong. Expected {address} but was {events.Address}");
Assert.True(events.Value == newValue,
$"Value was wrong. Expected {newValue} but was {events.Value}");
recordingObserverInvoked = true;
} catch (Exception e) {
ex = e;
} finally {
completion.Set();
}
});
Assert.True(recordingObserver.ObserverToken != IntPtr.Zero, "TokenByAddingParameterRecordingObserver return zero pointer for recording observer.");
parameter.Value = newValue;
completion.WaitOne(TimeSpan.FromSeconds(1));
Assert.IsNull(ex, "Exceptions");
Assert.True(recordingObserverInvoked, "Recording observer was not invoked when parameter value was changed.");
}
}
}
public void CreateTokenByAddingParameterRecordingObserver()
{
if (!TestRuntime.CheckSystemAndSDKVersion(9, 0))
{
Assert.Ignore("Ignoring AudioUnitv3 tests: Requires iOS9+");
}
const ulong address = 0;
const float newValue = 10f;
bool recordingObserverInvoked = false;
var completion = new ManualResetEvent(false);
using (var parameter = CreateAUParameter()) {
using (var tree = AUParameterTree.CreateTree(new AUParameterNode[] { parameter })) {
var recordingObserver = tree.CreateTokenByAddingParameterRecordingObserver((nint numberOfEvents, ref AURecordedParameterEvent events) => {
Assert.True(numberOfEvents == 1,
$"Number of events was wrong. Expected {1} but was {numberOfEvents}");
Assert.True(events.Address == address,
$"Address was wrong. Expected {address} but was {events.Address}");
Assert.True(events.Value == newValue,
$"Value was wrong. Expected {newValue} but was {events.Value}");
recordingObserverInvoked = true;
completion.Set();
});
Assert.True(recordingObserver.ObserverToken != IntPtr.Zero, "TokenByAddingParameterRecordingObserver return zero pointer for recording observer.");
parameter.Value = newValue;
completion.WaitOne(TimeSpan.FromSeconds(1));
Assert.True(recordingObserverInvoked, "Recording observer was not invoked when paramter value was changed.");
}
}
}
public MyAudioUnit(AudioComponentDescription description, AudioComponentInstantiationOptions options, out NSError error)
: base(description, options, out error)
{
// Create parameter objects.
AUParameter param1 = AUParameterTree.CreateParameter(
"param1",
"Parameter 1",
0, 0, 100,
AudioUnitParameterUnit.Percent,
string.Empty,
0, null, null
);
// Initialize the parameter values.
param1.Value = .5f;
// Create the parameter tree.
parameterTree = AUParameterTree.CreateTree(new[] { param1 });
// Create the input and output busses.
// Create the input and output bus arrays.
// A function to provide string representations of parameter values.
parameterTree.ImplementorStringFromValueCallback = (AUParameter param, ref float?value) =>
{
switch (param.Address)
{
case 0:
return((NSString)value?.ToString());
default:
return(new NSString("?"));
}
};
MaximumFramesToRender = 512;
}
static AUParameter CreateAUParameter()
{
return(AUParameterTree.CreateParameter("resonance", "Resonance", 0, -20, 20, AudioUnitParameterUnit.Decibels, null, (AudioUnitParameterOptions)0, null, null));
}
