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highlight data received that does not match what was sent

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This commit is contained in:
Lewis Moten
2024-05-03 23:37:51 -04:00
parent 53efd951d9
commit 348ea8df7c
3 changed files with 198 additions and 73 deletions
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98
index.html
View File

@@ -11,55 +11,83 @@
<h1>Data Over Audio</h1>
<div class="panels">
<div>
Segment Duration: <input id="bit-duration-text" type="number" min="0" max="1000" value="190">ms<br>
Amplitude Threshold: <input id="amplitude-threshold-text" type="number" min="0" max="100" value="75"><br>
Minimum Frequency: <input id="minimum-frequency" type="number" min="20" max="20000" value="900"><br>
Maximum Frequency: <input id="maximum-frequency" type="number" min="20" max="20000" value="1200"><br>
Last Segment Percent: <input id="last-bit-percent" type="number" min="0" max="100" value="90">%<br>
FFT Size: 2^<input id="fft-size-power-text" type="number" min="5" max="15" value="90"><br>
Frequency Resolution: <span id="frequency-resolution">N/A</span><br>
Frequency Count: <span id="frequency-count">N/A</span><br>
Frequency Resolution Multiplier: <input id="frequency-resolution-multiplier" type="number" min="1" max="10"
value="2"><br>
Smoothing Time Constant: <input id="smoothing-time-constant-text" type="number" min="0.00" max="1.00" step="0.01"
value="0.00"><br>
<label>
<input type="checkbox" id="error-correction-hamming" checked>Hamming Code Error Correction
</label><br>
<h2>Message</h2>
<input type="text" id="text-to-send">
<button id="send-button">Send</button>
<h2>Sent</h2>
<button id="send-button">Send</button><br />
<textarea id="sent-data" rows="10" cols="40"></textarea><br />
</div>
<div>
<h2>Encoded</h2>
<textarea id="encoded-data" rows="10" cols="40"></textarea><br />
</div>
<div>
<label>
<input type="checkbox" id="is-listening-checkbox">Listening
</label>
<h2>Received</h2>
<textarea id="received-data" rows="10" cols="40"></textarea><br />
<div class="raw-data" id="received-data"></div><br />
Error Percent: <span id="received-data-error-percent">N/A</span>%
</div>
<div>
<h2>Decoded</h2>
<div class="raw-data" id="decoded-data"></div><br />
Error Percent: <span id="decoded-data-error-percent">N/A</span>%<br />
Data Byte Count: <span id="decoded-byte-count">N/A</span><br />
</div>
<div>
<h2>Decoded Text</h2>
<div class="raw-data" id="decoded-text"></div><br />
</div>
<div>
<h2>Frequency Graph</h2>
<canvas id="received-graph" width="800" height="150"></canvas><br>
<label>
<input type="checkbox" id="pause-after-end" checked>Pause after end
</label><br>
Max Segments Displayed: <input id="max-bits-displayed-on-graph" type="number" min="1" max="2000"><br>
</div>
<div>
<h2>Configuration</h2>
Segment Duration: <input id="bit-duration-text" type="number" min="0" max="1000" value="190">ms<br>
Amplitude Threshold: <input id="amplitude-threshold-text" type="number" min="0" max="100" value="75"><br>
Minimum Frequency: <input id="minimum-frequency" type="number" min="20" max="20000" value="900"><br>
Maximum Frequency: <input id="maximum-frequency" type="number" min="20" max="20000" value="1200"><br>
Last Segment Percent: <input id="last-bit-percent" type="number" min="0" max="100" value="90">%<br>
FFT Size: 2^<input id="fft-size-power-text" type="number" min="5" max="15" value="90"><br>
Frequency Resolution Multiplier: <input id="frequency-resolution-multiplier" type="number" min="1" max="20"
value="2"><br>
Smoothing Time Constant: <input id="smoothing-time-constant-text" type="number" min="0.00" max="1.00" step="0.01"
value="0.00"><br>
<label>
<input type="checkbox" id="error-correction-hamming" checked>Hamming Code Error Correction
</label><br>
</div>
<div>
<h2>Packet</h2>
Data Bits: <span id="data-bits-to-send">N/A</span> Bytes: <span id="data-bytes-to-send">N/A</span><br />
Data Size Header Bits: <span id="data-size-header-bits">N/A</span><br />
Error Correction Bits: <span id="error-correction-bits">N/A</span><br />
Total Bits: <span id="total-bits-to-send">N/A</span> Bytes: <span id="total-bytes-to-send">N/A</span><br />
Channels: <span id="packet-send-channel-count">N/A</span><br />
Segment Count: <span id="packet-send-segment-count">N/A</span><br />
Segment Duration: <span id="packet-send-segment-duration">N/A</span>s<br />
Total Duration: <span id="duration-to-send">N/A</span>s<br />
</div>
<div>
<h2>Information</h2>
Frequency Resolution: <span id="frequency-resolution">N/A</span><br>
Frequency Count: <span id="frequency-count">N/A</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.<br />
Segments per second: <span id="durations-per-second">N/A</span><br />
Bits per segment: <span id="bits-per-duration">N/A</span><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 />
Effective Speed: <span id="effective-speed-bits-per-second">N/A</span> Baud<br>
<span id="effective-speed-bytes-per-second">N/A</span> Bytes/second<br />
</div>
<canvas id="received-graph" width="550" height="100"></canvas><br>
<div>
<div>
<h2>Decoded</h2>
<textarea id="decoded-data" rows="10" cols="40"></textarea><br />
Data Byte Count: <span id="decoded-byte-count">N/A</span><br />
</div>
</div>
<div>
<label>
<input type="checkbox" id="pause-after-end" checked>Pause after end
</label><br>
Max Bits Displayed: <input id="max-bits-displayed-on-graph" type="number" min="1" max="2000"><br>
<h2>Speed</h2>
Baud: <span id="data-transfer-speed-bits-per-second">N/A</span><br>
Bytes/s: <span id="data-transfer-speed-bytes-per-second">N/A</span><br />
Effective Baud: <span id="effective-speed-bits-per-second">N/A</span><br>
Effective Bytes/s: <span id="effective-speed-bytes-per-second">N/A</span><br />
</div>
</div>
</body>

155
index.js
View File

@@ -36,6 +36,10 @@ var PAUSE = false;
var PAUSE_AFTER_END = true;
var PACKET_SIZE_BITS = 10;
var EXPECTED_ENCODED_BITS = [];
var EXPECTED_BITS = [];
var EXPECTED_TEXT = '';
const packetBits = [];
const packetDecodedBits = [];
let packetDataByteCount = -1;
@@ -114,10 +118,35 @@ function handleWindowLoad() {
// wire up events
sendButton.addEventListener('click', handleSendButtonClick);
isListeningCheckbox.addEventListener('click', handleListeningCheckbox);
// textToSend.addEventListener('keypress', handleTextToSendKeypress);
textToSend.addEventListener('input', handleTextToSendInput);
handleTextToSendInput();
showSpeed();
}
function handleTextToSendInput() {
const text = textToSend.value;
const dataByteCount = text.length;
const dataBitCount = dataByteCount * 8;
const nibblesToEncode = HAMMING_ERROR_CORRECTION ? Math.ceil((dataBitCount + PACKET_SIZE_BITS) / 4) : 0;
const errorCorrectionBits = nibblesToEncode * 3;
const totalBits = errorCorrectionBits + dataBitCount + PACKET_SIZE_BITS;
const totalBytes = Math.ceil(totalBits / 8);
const channelCount = getChannels().length;
const segmentCount = Math.ceil(totalBits / channelCount);
const totalDuration = ((segmentCount * FREQUENCY_DURATION) / 1000);
document.getElementById('error-correction-bits').innerText = errorCorrectionBits.toLocaleString();
document.getElementById('data-bytes-to-send').innerText = dataByteCount.toLocaleString();
document.getElementById('data-bits-to-send').innerText = dataBitCount.toLocaleString();
document.getElementById('total-bytes-to-send').innerText = totalBytes.toLocaleString();
document.getElementById('total-bits-to-send').innerText = totalBits.toLocaleString();
document.getElementById('duration-to-send').innerText = totalDuration.toLocaleString();
document.getElementById('packet-send-channel-count').innerText = channelCount.toLocaleString();
document.getElementById('packet-send-segment-count').innerText = segmentCount.toLocaleString();
document.getElementById('packet-send-segment-duration').innerText = (FREQUENCY_DURATION / 1000).toLocaleString();
document.getElementById('data-size-header-bits').innerText = PACKET_SIZE_BITS.toLocaleString();
}
function updateFrequencyResolution() {
const sampleRate = getAudioContext().sampleRate;
const fftSize = 2 ** FFT_POWER;
@@ -149,6 +178,7 @@ function showSpeed() {
document.getElementById('effective-speed-bits-per-second').innerText = effectiveBaud.toFixed(2);
document.getElementById('effective-speed-bytes-per-second').innerText = effectiveBytes.toFixed(2);
}
handleTextToSendInput();
}
function nibbleToHamming(nibble) {
if(nibble.length !== 4) return [];
@@ -223,9 +253,12 @@ function sendBits(bits) {
.padStart(PACKET_SIZE_BITS, '0')
.split('')
.map(Number);
bits.unshift(...packetLength);
logSent(bits.join(''));
EXPECTED_BITS = bits.slice();
document.getElementById('sent-data').value = bits.reduce(bitReducer, '');
if(HAMMING_ERROR_CORRECTION) {
const encodedBits = [];
@@ -234,8 +267,11 @@ function sendBits(bits) {
while(nibble.length < 4) nibble.push(0);
encodedBits.push(...nibbleToHamming(bits.slice(i, i + 4)));
}
document.getElementById('encoded-data').value = encodedBits.reduce(bitReducer, '');
bits = encodedBits;
}
EXPECTED_ENCODED_BITS = bits.slice();
var audioContext = getAudioContext();
const channels = getChannels();
const oscillators = [];
@@ -440,7 +476,7 @@ function processSegmentReceived() {
});
const bitValues = channels.map(({isHigh, isLow, isMissing}) => {
if(isMissing > isHigh + isLow) return '.';
return isHigh > isLow ? '1' : '0';
return isHigh > isLow ? 1 : 0;
});
packetBits.push(...bitValues);
@@ -452,17 +488,18 @@ function processSegmentReceived() {
const hamming = packetBits.slice(i, i + 7);
const nibble = hammingToNibble(hamming);
packetDecodedBits.push(...nibble);
console.log(i, hamming, nibble);
}
} else {
packetDecodedBits = packetBits;
packetDecodedBits.length = 0;
packetDecodedBits.push(...packetBits);
}
if(packetDecodedBits.length >= 10) {
// we can evaluate how many bytes are comming
const encodedBitsNeeded = Math.ceil(10 * encodingRatio);
const dataLengthIndex = Math.floor(encodedBitsNeeded / channelCount);
if(dataLengthIndex === segmentIndex) {
// Determine if we can identify the length of data comming
const encodedBitsNeededForDataLength = Math.ceil(Math.ceil(PACKET_SIZE_BITS / 4) * encodingRatio);
if(packetDecodedBits.length >= encodedBitsNeededForDataLength) {
// we can evaluate when we should know many bytes are comming
const dataLengthIndex = Math.floor(encodedBitsNeededForDataLength / channelCount);
// if(dataLengthIndex === segmentIndex) {
// we just got the bits we needed
packetDataByteCount = 1 + packetDecodedBits
.slice(0, PACKET_SIZE_BITS)
@@ -473,43 +510,86 @@ function processSegmentReceived() {
const segments = Math.ceil(totalBits / channelCount);
const duration = segments * FREQUENCY_DURATION;
const streamEnded = streamStarted + duration;
console.log({
tenBitNum: packetDecodedBits
.slice(0, PACKET_SIZE_BITS).join(''),
packetDataByteCount,
PACKET_SIZE_BITS,
totalBits,
segments,
streamStarted,
duration,
streamEnded
});
// console.log({
// tenBitNum: packetDecodedBits
// .slice(0, PACKET_SIZE_BITS).join(''),
// packetDataByteCount,
// PACKET_SIZE_BITS,
// totalBits,
// segments,
// streamStarted,
// duration,
// streamEnded
// });
// update everyones proposed end time
frequencyOverTime
.filter(fot => fot.streamStarted === streamStarted)
.forEach(fot => {
fot.streamEnded = streamEnded
});
}
// }
// remove phantom bits
const totalBits = Math.ceil(((packetDataByteCount * 8) + PACKET_SIZE_BITS) * encodingRatio);
// const totalBits = Math.ceil(((packetDataByteCount * 8) + PACKET_SIZE_BITS) * encodingRatio);
if(packetBits.length > totalBits) {
const excess = packetBits.length % totalBits;
packetBits.length = totalBits;
bitValues.length = bitValues.length - excess;
// const excess = packetBits.length % totalBits;
// packetBits.length = totalBits;
// bitValues.length = bitValues.length - excess;
}
}
document.getElementById('decoded-data').value = packetDecodedBits.reduce((all, bit, i) => {
if(i !== 0 && i % 8 === 0) return all + ' ' + bit;
return all + bit;
}, '');
document.getElementById('received-data').value = packetBits.reduce((all, bit, i) => {
if(i !== 0 && i % 8 === 0) return all + ' ' + bit;
return all + bit;
}, '');
document.getElementById('decoded-data').innerHTML = packetDecodedBits.reduce(bitExpectorReducer(EXPECTED_BITS), '');
document.getElementById('received-data').innerHTML = packetBits.reduce(bitExpectorReducer(EXPECTED_ENCODED_BITS), '');
const encodedBitCount = EXPECTED_ENCODED_BITS.length;
const decodedBitCount = EXPECTED_BITS.length;
const correctEncodedBits = packetBits.filter((b, i) => i < encodedBitCount && b === EXPECTED_ENCODED_BITS[i]).length;
const correctedDecodedBits = packetDecodedBits.filter((b, i) => i < decodedBitCount && b === EXPECTED_BITS[i]).length;
document.getElementById('received-data-error-percent').innerText = (
Math.floor((1 - (correctEncodedBits / encodedBitCount)) * 1000) * 0.1
).toLocaleString();
document.getElementById('decoded-data-error-percent').innerText = (
Math.floor((1 - (correctedDecodedBits / decodedBitCount)) * 1000) * 0.1
).toLocaleString();
document.getElementById('decoded-text').innerHTML = packetDecodedBits.reduce(textExpectorReducer(EXPECTED_TEXT), '');
}
function bitReducer(all, bit, i) {
if(i !== 0 && i % 8 === 0) return all + ' ' + bit;
return all + bit;
}
const bitExpectorReducer = expected => (all, bit, i) => {
// if(i === 0) console.log(expected.slice(), all, bit, i);
if(i !== 0 && i % 8 === 0) all += ' ';
if(i >= expected.length) {
all += '<span class="bit-unexpected">';
} else if(expected[i] !== bit) {
all += '<span class="bit-wrong">';
}
all += bit;
if(i >= expected.length || expected[i] !== bit) {
all += '</span>';
}
return all;
}
const textExpectorReducer = expected => (all, bit, i, bits) => {
if(i < PACKET_SIZE_BITS) return all;
if((i - PACKET_SIZE_BITS) % 8 === 0) {
const bitString = bits.slice(
i,
i + 8
).join('').padEnd(8, '0');
const ascii = parseInt(bitString, 2);
const char = String.fromCharCode(ascii);
const charIndex = Math.floor((i - PACKET_SIZE_BITS) / 8);
if(char !== expected[charIndex]) {
all += '<span class="bit-wrong">' + char + '</span>';
} else {
all += char;
}
}
return all;
}
function resetGraphData() {
frequencyOverTime.length = 0;
bitStart.length = 0;
@@ -552,6 +632,7 @@ function handleSendButtonClick() {
sentDataTextArea.value = '';
const text = document.getElementById('text-to-send').value;
EXPECTED_TEXT = text;
sendBits(textToBits(text));
}
function handleListeningCheckbox(e) {
@@ -761,7 +842,7 @@ function drawFrequencyData() {
ctx.moveTo(0, thresholdY);
ctx.lineTo(width, thresholdY);
ctx.stroke();
drawBitDurationLines(ctx, 'yellow');
drawBitDurationLines(ctx, 'rgba(255, 255, 0, .25)');
drawBitStart(ctx, 'green');
const frequencies = getChannels();
frequencies.forEach(([low, high], i) => {

18
style.css
View File

@@ -18,7 +18,23 @@ body {
border-bottom: 4px solid darkolivegreen;
color: black;
}
.panels > div textarea {
#received-graph {
background-color: black;
}
textarea, .raw-data {
background-color: rgb(41, 59, 10);
color: rgb(75, 185, 75);
width: 250px;
height: 75px;
font-size: x-small;
border: 1px solid grey;
overflow: auto;
font-family: monospace;
}
.bit-wrong {
font-weight: bolder;
color: red;
}
.bit-unexpected {
color: green;
}