lili/data-over-audio
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Display speed as baud and bytes/second

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Lewis Moten
2024-05-02 20:44:44 -04:00
parent a74b463905
commit d508dd700b
2 changed files with 13 additions and 2 deletions
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4
index.html
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@@ -28,7 +28,9 @@
<h2>Received</h2> <h2>Received</h2>
<textarea id="received-data" rows="10" cols="40"></textarea><br /> <textarea id="received-data" rows="10" cols="40"></textarea><br />
Samples Per Bit: <span id="samples-per-bit">0</span><br> Samples Per Bit: <span id="samples-per-bit">0</span><br>
Sample Rate: <span id="audio-context-sample-rate">N/A</span> per second. Sample Rate: <span id="audio-context-sample-rate">N/A</span> per second.<br />
Speed: <span id="data-transfer-speed-bits-per-second">N/A</span> Baud<br>
<span id="data-transfer-speed-bytes-per-second">N/A</span> Bytes/second<br />
</div> </div>
<div> <div>
<canvas id="received-graph" width="550" height="100"></canvas> <canvas id="received-graph" width="550" height="100"></canvas>

11
index.js
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@@ -21,7 +21,7 @@ var FREQUENCY_HIGH = 400;
var FREQUENCY_LOW = 500; var FREQUENCY_LOW = 500;
var FREQUENCY_DURATION = 100; var FREQUENCY_DURATION = 100;
var FREQUENCY_THRESHOLD = 200; var FREQUENCY_THRESHOLD = 200;
var SAMPLE_DELAY_MS = 10; var SAMPLE_DELAY_MS = 1;
var FFT_POWER = 10; var FFT_POWER = 10;
var LAST_BIT_PERCENT = 0.8; var LAST_BIT_PERCENT = 0.8;
var SMOOTHING_TIME_CONSTANT = 0; var SMOOTHING_TIME_CONSTANT = 0;
@@ -50,6 +50,7 @@ function handleWindowLoad() {
FREQUENCY_DURATION = parseInt(event.target.value); FREQUENCY_DURATION = parseInt(event.target.value);
bitSampleCount = 0; bitSampleCount = 0;
samplesPerBit.length = 0; samplesPerBit.length = 0;
showSpeed();
}); });
document.getElementById('max-bits-displayed-on-graph').value= MAX_BITS_DISPLAYED_ON_GRAPH; document.getElementById('max-bits-displayed-on-graph').value= MAX_BITS_DISPLAYED_ON_GRAPH;
document.getElementById('max-bits-displayed-on-graph').addEventListener('input', (event) => { document.getElementById('max-bits-displayed-on-graph').addEventListener('input', (event) => {
@@ -89,6 +90,14 @@ function handleWindowLoad() {
sendButton.addEventListener('click', handleSendButtonClick); sendButton.addEventListener('click', handleSendButtonClick);
isListeningCheckbox.addEventListener('click', handleListeningCheckbox); isListeningCheckbox.addEventListener('click', handleListeningCheckbox);
textToSend.addEventListener('keypress', handleTextToSendKeypress); textToSend.addEventListener('keypress', handleTextToSendKeypress);
showSpeed();
}
function showSpeed() {
const baud = 1000 / FREQUENCY_DURATION;
const bytes = baud / 8;
document.getElementById('data-transfer-speed-bits-per-second').innerText = baud.toFixed(2);
document.getElementById('data-transfer-speed-bytes-per-second').innerText = bytes.toFixed(2);
} }
function handleTextToSendKeypress(event) { function handleTextToSendKeypress(event) {