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Added ability to combine local and mocturnal birds for BirdNET
renamed 'migrants' to nocturnal added a gain node moved more 'change' events to the document change handler beginnings of a normaliser node, using a worklet
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // This needs some refinement! | ||
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| class AudioNormalizerProcessor extends AudioWorkletProcessor { | ||
| static get parameterDescriptors() { | ||
| return [{ name: 'peakLoudness', defaultValue: -3 }]; | ||
| } | ||
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| process(inputs, outputs, parameters) { | ||
| const input = inputs[0]; | ||
| const output = outputs[0]; | ||
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| const peakLoudness = parameters.peakLoudness[0]; | ||
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| for (let channel = 0; channel < input.length; ++channel) { | ||
| const inputData = input[channel]; | ||
| const outputData = output[channel]; | ||
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| // Increase buffer size | ||
| const bufferSize = 1024; // Adjust as needed | ||
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| for (let sample = 0; sample < inputData.length; sample += bufferSize) { | ||
| let maxAbsValue = 0; | ||
| const endSample = Math.min(sample + bufferSize, inputData.length); | ||
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| for (let s = sample; s < endSample; ++s) { | ||
| const absValue = Math.abs(inputData[s]); | ||
| if (absValue > maxAbsValue) { | ||
| maxAbsValue = absValue; | ||
| } | ||
| } | ||
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| const desiredPeak = Math.pow(10, peakLoudness / 20); // Convert dB to linear scale | ||
| const scaleFactor = desiredPeak / (maxAbsValue + 1e-5); // Handle division by zero | ||
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| for (let s = sample; s < endSample; ++s) { | ||
| outputData[s] = inputData[s] * scaleFactor; | ||
| } | ||
| } | ||
| } | ||
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| return true; | ||
| } | ||
| } | ||
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| registerProcessor('audio-normalizer-processor', AudioNormalizerProcessor); | ||
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