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instant creak response + jitter suppression + removed weird lag #4

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424e3e8
Instant creak response + jitter suppression; advanced settings toggle
toorusr Sep 6, 2025
fd7afe8
cut: ui elements for jitterness config
toorusr Sep 7, 2025
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3 changes: 2 additions & 1 deletion .gitignore
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Original file line number Diff line number Diff line change
@@ -1 +1,2 @@
/build
# Build artifacts
build/
158 changes: 74 additions & 84 deletions LidAngleSensor/AppDelegate.m
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Original file line number Diff line number Diff line change
Expand Up @@ -53,56 +53,54 @@ - (BOOL)applicationSupportsSecureRestorableState:(NSApplication *)app {
}

- (void)createWindow {
// Create the main window (taller to accommodate mode selection and audio controls)
NSRect windowFrame = NSMakeRect(100, 100, 450, 480);
// Create the main window (taller to accommodate mode + jitter controls)
NSRect windowFrame = NSMakeRect(100, 100, 500, 650);
self.window = [[NSWindow alloc] initWithContentRect:windowFrame
styleMask:NSWindowStyleMaskTitled |
NSWindowStyleMaskClosable |
styleMask:NSWindowStyleMaskTitled |
NSWindowStyleMaskClosable |
NSWindowStyleMaskMiniaturizable
backing:NSBackingStoreBuffered
defer:NO];

[self.window setTitle:@"MacBook Lid Angle Sensor"];
[self.window makeKeyAndOrderFront:nil];
[self.window center];

// Create the content view

NSView *contentView = [[NSView alloc] initWithFrame:windowFrame];
[self.window setContentView:contentView];
// Create angle display label with tabular numbers (larger, light font)

// Angle label
self.angleLabel = [[NSLabel alloc] init];
[self.angleLabel setStringValue:@"Initializing..."];
[self.angleLabel setFont:[NSFont monospacedDigitSystemFontOfSize:48 weight:NSFontWeightLight]];
[self.angleLabel setAlignment:NSTextAlignmentCenter];
[self.angleLabel setTextColor:[NSColor systemBlueColor]];
[contentView addSubview:self.angleLabel];
// Create velocity display label with tabular numbers

// Velocity label
self.velocityLabel = [[NSLabel alloc] init];
[self.velocityLabel setStringValue:@"Velocity: 00 deg/s"];
[self.velocityLabel setFont:[NSFont monospacedDigitSystemFontOfSize:14 weight:NSFontWeightRegular]];
[self.velocityLabel setAlignment:NSTextAlignmentCenter];
[contentView addSubview:self.velocityLabel];
// Create status label

// Status label
self.statusLabel = [[NSLabel alloc] init];
[self.statusLabel setStringValue:@"Detecting sensor..."];
[self.statusLabel setFont:[NSFont systemFontOfSize:14]];
[self.statusLabel setAlignment:NSTextAlignmentCenter];
[self.statusLabel setTextColor:[NSColor secondaryLabelColor]];
[contentView addSubview:self.statusLabel];
// Create audio toggle button

// Audio toggle
self.audioToggleButton = [[NSButton alloc] init];
[self.audioToggleButton setTitle:@"Start Audio"];
[self.audioToggleButton setBezelStyle:NSBezelStyleRounded];
[self.audioToggleButton setTarget:self];
[self.audioToggleButton setAction:@selector(toggleAudio:)];
[self.audioToggleButton setTranslatesAutoresizingMaskIntoConstraints:NO];
[contentView addSubview:self.audioToggleButton];
// Create audio status label

// Audio status
self.audioStatusLabel = [[NSLabel alloc] init];
[self.audioStatusLabel setStringValue:@""];
[self.audioStatusLabel setFont:[NSFont systemFontOfSize:14]];
Expand Down Expand Up @@ -130,30 +128,30 @@ - (void)createWindow {
[contentView addSubview:self.modeSelector];

// Set up auto layout constraints

// Constraints
[NSLayoutConstraint activateConstraints:@[
// Angle label (main display, now at top)
// Angle label
[self.angleLabel.topAnchor constraintEqualToAnchor:contentView.topAnchor constant:40],
[self.angleLabel.centerXAnchor constraintEqualToAnchor:contentView.centerXAnchor],
[self.angleLabel.widthAnchor constraintLessThanOrEqualToAnchor:contentView.widthAnchor constant:-40],

// Velocity label
[self.velocityLabel.topAnchor constraintEqualToAnchor:self.angleLabel.bottomAnchor constant:15],
[self.velocityLabel.centerXAnchor constraintEqualToAnchor:contentView.centerXAnchor],
[self.velocityLabel.widthAnchor constraintLessThanOrEqualToAnchor:contentView.widthAnchor constant:-40],

// Status label
[self.statusLabel.topAnchor constraintEqualToAnchor:self.velocityLabel.bottomAnchor constant:15],
[self.statusLabel.centerXAnchor constraintEqualToAnchor:contentView.centerXAnchor],
[self.statusLabel.widthAnchor constraintLessThanOrEqualToAnchor:contentView.widthAnchor constant:-40],
// Audio toggle button
[self.audioToggleButton.topAnchor constraintEqualToAnchor:self.statusLabel.bottomAnchor constant:25],

// Audio toggle
[self.audioToggleButton.topAnchor constraintEqualToAnchor:self.statusLabel.bottomAnchor constant:15],
[self.audioToggleButton.centerXAnchor constraintEqualToAnchor:contentView.centerXAnchor],
[self.audioToggleButton.widthAnchor constraintEqualToConstant:120],
[self.audioToggleButton.heightAnchor constraintEqualToConstant:32],

// Audio status label
[self.audioStatusLabel.topAnchor constraintEqualToAnchor:self.audioToggleButton.bottomAnchor constant:15],

// Audio status
[self.audioStatusLabel.topAnchor constraintEqualToAnchor:self.audioToggleButton.bottomAnchor constant:10],
[self.audioStatusLabel.centerXAnchor constraintEqualToAnchor:contentView.centerXAnchor],
[self.audioStatusLabel.widthAnchor constraintLessThanOrEqualToAnchor:contentView.widthAnchor constant:-40],

Expand All @@ -167,13 +165,11 @@ - (void)createWindow {
[self.modeSelector.centerXAnchor constraintEqualToAnchor:contentView.centerXAnchor],
[self.modeSelector.widthAnchor constraintEqualToConstant:200],
[self.modeSelector.heightAnchor constraintEqualToConstant:28],
[self.modeSelector.bottomAnchor constraintLessThanOrEqualToAnchor:contentView.bottomAnchor constant:-20]
]];
}

- (void)initializeLidSensor {
self.lidSensor = [[LidAngleSensor alloc] init];

if (self.lidSensor.isAvailable) {
[self.statusLabel setStringValue:@"Sensor detected - Reading angle..."];
[self.statusLabel setTextColor:[NSColor systemGreenColor]];
Expand All @@ -188,7 +184,6 @@ - (void)initializeLidSensor {
- (void)initializeAudioEngines {
self.creakAudioEngine = [[CreakAudioEngine alloc] init];
self.thereminAudioEngine = [[ThereminAudioEngine alloc] init];

if (self.creakAudioEngine && self.thereminAudioEngine) {
[self.audioStatusLabel setStringValue:@""];
} else {
Expand Down Expand Up @@ -253,75 +248,70 @@ - (id)currentAudioEngine {
}

- (void)startUpdatingDisplay {
// Update every 16ms (60Hz) for smooth real-time audio and display updates
self.updateTimer = [NSTimer scheduledTimerWithTimeInterval:0.016
// Faster updates (100Hz) to minimize control latency
self.updateTimer = [NSTimer scheduledTimerWithTimeInterval:0.010
target:self
selector:@selector(updateAngleDisplay)
userInfo:nil
repeats:YES];
self.updateTimer.tolerance = 0.0;
[[NSRunLoop mainRunLoop] addTimer:self.updateTimer forMode:NSRunLoopCommonModes];
}

- (void)updateAngleDisplay {
if (!self.lidSensor.isAvailable) {
return;
}

double angle = [self.lidSensor lidAngle];

if (angle == -2.0) {
-(void)updateAngleDisplay {
if (!self.lidSensor.isAvailable) return;
double rawAngle = [self.lidSensor lidAngle];
if (rawAngle == -2.0) {
[self.angleLabel setStringValue:@"Read Error"];
[self.angleLabel setTextColor:[NSColor systemOrangeColor]];
[self.statusLabel setStringValue:@"Failed to read sensor data"];
[self.statusLabel setTextColor:[NSColor systemOrangeColor]];
} else {
[self.angleLabel setStringValue:[NSString stringWithFormat:@"%.1f°", angle]];
[self.angleLabel setTextColor:[NSColor systemBlueColor]];

// Update current audio engine with new angle
id currentEngine = [self currentAudioEngine];
if (currentEngine) {
[currentEngine updateWithLidAngle:angle];

// Update velocity display with leading zero and whole numbers
double velocity = [currentEngine currentVelocity];
int roundedVelocity = (int)round(velocity);
if (roundedVelocity < 100) {
[self.velocityLabel setStringValue:[NSString stringWithFormat:@"Velocity: %02d deg/s", roundedVelocity]];
return;
}

// Update engine first, then display stabilized angle (creak) or raw (theremin)
double displayAngle = rawAngle;
if (self.currentAudioMode == AudioModeCreak) {
if (self.creakAudioEngine) {
[self.creakAudioEngine updateWithLidAngle:rawAngle];
displayAngle = self.creakAudioEngine.currentStabilizedAngle;
double velocity = self.creakAudioEngine.currentVelocity;
int rv = (int)llround(velocity);
if (rv < 100) {
[self.velocityLabel setStringValue:[NSString stringWithFormat:@"Velocity: %02d deg/s", rv]];
} else {
[self.velocityLabel setStringValue:[NSString stringWithFormat:@"Velocity: %d deg/s", roundedVelocity]];
[self.velocityLabel setStringValue:[NSString stringWithFormat:@"Velocity: %d deg/s", rv]];
}

// Show audio parameters when running
if ([currentEngine isEngineRunning]) {
if (self.currentAudioMode == AudioModeCreak) {
double gain = [currentEngine currentGain];
double rate = [currentEngine currentRate];
[self.audioStatusLabel setStringValue:[NSString stringWithFormat:@"Gain: %.2f, Rate: %.2f", gain, rate]];
} else if (self.currentAudioMode == AudioModeTheremin) {
double frequency = [currentEngine currentFrequency];
double volume = [currentEngine currentVolume];
[self.audioStatusLabel setStringValue:[NSString stringWithFormat:@"Freq: %.1f Hz, Vol: %.2f", frequency, volume]];
}
if (self.creakAudioEngine.isEngineRunning) {
[self.audioStatusLabel setStringValue:[NSString stringWithFormat:@"Gain: %.2f, Rate: %.2f", self.creakAudioEngine.currentGain, self.creakAudioEngine.currentRate]];
}
}
// Provide contextual status based on angle
NSString *status;
if (angle < 5.0) {
status = @"Lid is closed";
} else if (angle < 45.0) {
status = @"Lid slightly open";
} else if (angle < 90.0) {
status = @"Lid partially open";
} else if (angle < 120.0) {
status = @"Lid mostly open";
} else {
status = @"Lid fully open";
} else { // Theremin
if (self.thereminAudioEngine) {
[self.thereminAudioEngine updateWithLidAngle:rawAngle];
double velocity = self.thereminAudioEngine.currentVelocity;
int rv = (int)llround(velocity);
if (rv < 100) {
[self.velocityLabel setStringValue:[NSString stringWithFormat:@"Velocity: %02d deg/s", rv]];
} else {
[self.velocityLabel setStringValue:[NSString stringWithFormat:@"Velocity: %d deg/s", rv]];
}
if (self.thereminAudioEngine.isEngineRunning) {
[self.audioStatusLabel setStringValue:[NSString stringWithFormat:@"Freq: %.1f Hz, Vol: %.2f", self.thereminAudioEngine.currentFrequency, self.thereminAudioEngine.currentVolume]];
}
}

[self.statusLabel setStringValue:status];
[self.statusLabel setTextColor:[NSColor secondaryLabelColor]];
}
[self.angleLabel setStringValue:[NSString stringWithFormat:@"%.1f°", displayAngle]];
[self.angleLabel setTextColor:[NSColor systemBlueColor]];

NSString *status;
if (displayAngle < 5.0) status = @"Lid is closed";
else if (displayAngle < 45.0) status = @"Lid slightly open";
else if (displayAngle < 90.0) status = @"Lid partially open";
else if (displayAngle < 135.0) status = @"Lid mostly open";
else status = @"Lid fully open";
[self.statusLabel setStringValue:status];
[self.statusLabel setTextColor:[NSColor secondaryLabelColor]];
}

@end
11 changes: 11 additions & 0 deletions LidAngleSensor/CreakAudioEngine.h
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Expand Up @@ -29,6 +29,14 @@
@property (nonatomic, assign, readonly) double currentVelocity;
@property (nonatomic, assign, readonly) double currentGain;
@property (nonatomic, assign, readonly) double currentRate;
@property (nonatomic, assign, readonly) double currentStabilizedAngle; // Angle after hysteresis filter

// Jitter filter configuration (live‑tunable)
@property (nonatomic, assign) BOOL jitterFilterEnabled; // Enable/disable jitter suppression
@property (nonatomic, assign) double jitterAmplitudeDeg; // Peak‑to‑peak amplitude threshold (deg)
@property (nonatomic, assign) double jitterTimeWindowMs; // Time window to consider (ms)
@property (nonatomic, assign) double jitterMinDeltaDeg; // Min delta to count a sign flip (deg)
@property (nonatomic, assign) NSUInteger jitterMinSignFlips; // Required alternations in window

/**
* Initialize the audio engine and load audio files.
Expand Down Expand Up @@ -59,4 +67,7 @@
*/
- (void)setAngularVelocity:(double)velocity;

/** Reset internal jitter history (e.g., when toggling the filter). */
- (void)resetJitterHistory;

@end
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