34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
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import { Command } from 'commander';
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import wav from 'node-wav';
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import fs from 'fs';
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const program = new Command();
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program
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.requiredOption('-i, --input <input>', 'Input file')
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.requiredOption('-o, --output <output>', 'Output file')
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.requiredOption('--repeats <repeats>', 'Number of repeats')
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.parse(process.argv);
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const options = program.opts();
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let beep = wav.decode(fs.readFileSync(options.input));
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let samples = beep.channelData[0];
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const sampleRate = beep.sampleRate;
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const silenceDuration = sampleRate - samples.length;
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const silenceSamples = new Float32Array(silenceDuration).fill(0);
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let oneSecondChunk = new Float32Array(sampleRate);
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oneSecondChunk.set(samples, 0);
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oneSecondChunk.set(silenceSamples, samples.length);
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let numberOfRepeats = parseInt(options.repeats);
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let finalSamples = new Float32Array(sampleRate * numberOfRepeats);
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for (let i = 0; i < numberOfRepeats; i++) {
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finalSamples.set(oneSecondChunk, i * sampleRate);
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}
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let finalBuffer = wav.encode([finalSamples], { sampleRate: sampleRate, float: true, bitDepth: 32 });
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fs.writeFileSync(options.output, finalBuffer);
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