added HPG VEhicles Mission, Audio settings; mission Context menu

apps/dispatch/app/helpers/radioAudio.ts

@@ -0,0 +1,62 @@
+// Helper function for distortion curve generation
+function createDistortionCurve(amount: number): Float32Array {
+	const k = typeof amount === "number" ? amount : 50;
+	const nSamples = 44100;
+	const curve = new Float32Array(nSamples);
+	const deg = Math.PI / 180;
+
+	for (let i = 1; i < nSamples; i += 1) {
+		const x = (i * 2) / nSamples - 1;
+		curve[i] = ((3 + k) * x * 20 * deg) / (Math.PI + k * Math.abs(x));
+	}
+	return curve;
+}
+
+export const getRadioStream = (stream: MediaStream, volume: number): MediaStream | null => {
+	try {
+		const audioContext = new window.AudioContext();
+		const sourceNode = audioContext.createMediaStreamSource(stream);
+		const destinationNode = audioContext.createMediaStreamDestination();
+		const gainNode = audioContext.createGain();
+
+		gainNode.gain.setValueAtTime(volume, audioContext.currentTime); // Lower gain for reduced volume
+
+		// Create distortion node to simulate radio-like audio
+		const distortionNode = audioContext.createWaveShaper();
+		distortionNode.curve = createDistortionCurve(15);
+		distortionNode.oversample = "none";
+
+		// Compressor node for dynamic range compression
+		const compressorNode = audioContext.createDynamicsCompressor();
+		compressorNode.threshold.setValueAtTime(-60, audioContext.currentTime); // Lower threshold for more compression
+		compressorNode.knee.setValueAtTime(30, audioContext.currentTime); // Slightly softer knee for smoother compression
+		compressorNode.ratio.setValueAtTime(15, audioContext.currentTime); // Higher ratio for stronger compression
+		compressorNode.attack.setValueAtTime(0.002, audioContext.currentTime); // Faster attack for more aggressive compression
+		compressorNode.release.setValueAtTime(0.15, audioContext.currentTime); // Faster release for a "snappier" sound
+
+		// Low-pass filter to simulate reduced fidelity
+		const lowPassFilterNode = audioContext.createBiquadFilter();
+		lowPassFilterNode.type = "lowpass";
+		lowPassFilterNode.frequency.setValueAtTime(2800, audioContext.currentTime);
+
+		// High-pass filter to reduce low-end noise
+		const highPassFilterNode = audioContext.createBiquadFilter();
+		highPassFilterNode.type = "highpass";
+		highPassFilterNode.frequency.setValueAtTime(400, audioContext.currentTime);
+
+		// Chain the nodes
+		sourceNode
+			.connect(distortionNode) // Apply distortion first
+			.connect(highPassFilterNode) // Remove low-end noise
+			.connect(lowPassFilterNode) // Simulate reduced fidelity
+			.connect(compressorNode) // Apply compression
+			.connect(gainNode) // Connect to gain node
+			.connect(destinationNode); // Connect to output
+
+		// Return the modified stream
+		return destinationNode.stream;
+	} catch (error) {
+		console.error("Error processing audio stream:", error);
+		return null; // In case of error, return null so that the page doesn’t hang
+	}
+};