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Version 3.1.0 now with experimental DCT support.

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This commit is contained in:
Aaron D. Lee
2025-12-31 13:11:34 -05:00
parent e4a4a5e074
commit 4eefc946c4
10 changed files with 2520 additions and 299 deletions
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307
frontends/web/templates/encode.html
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@@ -36,7 +36,7 @@
<i class="bi bi-file-image me-1"></i> Carrier Image
</label>
<div class="drop-zone" id="carrierDropZone">
<input type="file" name="carrier" accept="image/*" required>
<input type="file" name="carrier" accept="image/*" required id="carrierInput">
<div class="drop-zone-label">
<i class="bi bi-cloud-arrow-up fs-3 d-block mb-2 text-muted"></i>
<span class="text-muted">Drop image or click to browse</span>
@@ -49,6 +49,20 @@
</div>
</div>
<!-- Capacity Info Panel (shown when carrier loaded) -->
<div class="alert alert-info small d-none" id="capacityPanel">
<div class="row align-items-center">
<div class="col">
<i class="bi bi-rulers me-1"></i>
<strong>Carrier:</strong> <span id="carrierDimensions">-</span>
</div>
<div class="col-auto">
<span class="badge bg-primary me-1" id="lsbCapacityBadge">LSB: -</span>
<span class="badge bg-secondary" id="dctCapacityBadge">DCT: -</span>
</div>
</div>
</div>
<!-- Payload Type Selector -->
<div class="mb-3">
<label class="form-label">
@@ -179,6 +193,141 @@
</div>
</div>
<!-- ================================================================
ADVANCED OPTIONS (v3.0) - Collapsible Section
================================================================ -->
<div class="mb-4">
<a class="btn btn-sm btn-outline-secondary w-100" data-bs-toggle="collapse" href="#advancedOptions" role="button" aria-expanded="false">
<i class="bi bi-gear me-1"></i> Advanced Options
<i class="bi bi-chevron-down ms-1" id="advancedChevron"></i>
</a>
<div class="collapse" id="advancedOptions">
<div class="card card-body mt-2 bg-dark border-secondary">
<!-- Embedding Mode Selection -->
<div class="mb-3">
<label class="form-label">
<i class="bi bi-cpu me-1"></i> Embedding Mode
<span class="badge bg-info ms-1">v3.0</span>
</label>
<div class="row g-2">
<!-- LSB Mode Card -->
<div class="col-md-6">
<div class="form-check card p-3 h-100 border-primary border-2" id="lsbModeCard">
<input class="form-check-input" type="radio" name="embed_mode" id="modeLsb" value="lsb" checked>
<label class="form-check-label w-100" for="modeLsb">
<div class="d-flex align-items-center mb-2">
<i class="bi bi-grid-3x3-gap text-primary fs-4 me-2"></i>
<strong>LSB Mode</strong>
<span class="badge bg-success ms-auto">Default</span>
</div>
<ul class="small text-muted mb-0 ps-3">
<li>Full color PNG output</li>
<li>Higher capacity (~375 KB/MP)</li>
<li>Faster processing</li>
</ul>
</label>
</div>
</div>
<!-- DCT Mode Card -->
<div class="col-md-6">
<div class="form-check card p-3 h-100 {% if not has_dct %}opacity-50{% endif %}" id="dctModeCard">
<input class="form-check-input" type="radio" name="embed_mode" id="modeDct" value="dct" {% if not has_dct %}disabled{% endif %}>
<label class="form-check-label w-100" for="modeDct">
<div class="d-flex align-items-center mb-2">
<i class="bi bi-soundwave text-info fs-4 me-2"></i>
<strong>DCT Mode</strong>
{% if has_dct %}
<span class="badge bg-info ms-auto">Stealth</span>
{% else %}
<span class="badge bg-secondary ms-auto">Unavailable</span>
{% endif %}
</div>
<ul class="small text-muted mb-0 ps-3">
<li>Grayscale output (PNG/JPEG)</li>
<li>Lower capacity (~75 KB/MP)</li>
<li>Better detection resistance</li>
</ul>
{% if not has_dct %}
<div class="alert alert-warning small mt-2 mb-0 py-1 px-2">
<i class="bi bi-exclamation-triangle me-1"></i>
Requires scipy: <code>pip install scipy</code>
</div>
{% endif %}
</label>
</div>
</div>
</div>
<!-- Mode comparison hint -->
<div class="form-text mt-2" id="modeHint">
<i class="bi bi-lightbulb me-1"></i>
<strong>LSB</strong> is best for most uses.
<strong>DCT</strong> provides better stealth but smaller capacity and grayscale output.
</div>
</div>
<!-- DCT Output Format (shown only when DCT selected) -->
<div class="mb-3 d-none" id="dctOutputFormatGroup">
<label class="form-label">
<i class="bi bi-file-image me-1"></i> DCT Output Format
</label>
<div class="row g-2">
<div class="col-6">
<div class="form-check card p-2 text-center" id="dctPngCard">
<input class="form-check-input mx-auto" type="radio" name="dct_output_format" id="dctFormatPng" value="png" checked>
<label class="form-check-label w-100" for="dctFormatPng">
<i class="bi bi-file-earmark-image text-success fs-5 d-block"></i>
<strong>PNG</strong>
<div class="small text-muted">Lossless, larger</div>
</label>
</div>
</div>
<div class="col-6">
<div class="form-check card p-2 text-center" id="dctJpegCard">
<input class="form-check-input mx-auto" type="radio" name="dct_output_format" id="dctFormatJpeg" value="jpeg">
<label class="form-check-label w-100" for="dctFormatJpeg">
<i class="bi bi-file-earmark-richtext text-warning fs-5 d-block"></i>
<strong>JPEG</strong>
<div class="small text-muted">Smaller, natural</div>
</label>
</div>
</div>
</div>
<div class="form-text mt-2">
<i class="bi bi-info-circle me-1"></i>
<strong>PNG</strong> is 100% reliable. <strong>JPEG</strong> produces smaller, more natural-looking files but uses lossy compression (Q=95).
</div>
</div>
<!-- Capacity Comparison (populated by JS) -->
<div class="d-none" id="modeCapacityComparison">
<div class="alert alert-secondary small mb-0">
<div class="row text-center">
<div class="col-6 border-end">
<div class="text-muted">LSB Capacity</div>
<div class="fs-5 text-primary" id="lsbCapacityDetail">-</div>
</div>
<div class="col-6">
<div class="text-muted">DCT Capacity</div>
<div class="fs-5 text-info" id="dctCapacityDetail">-</div>
</div>
</div>
<div class="text-center mt-2 small text-muted" id="capacityRatio">
DCT is ~20% of LSB capacity
</div>
</div>
</div>
</div>
</div>
</div>
<button type="submit" class="btn btn-primary btn-lg w-100" id="encodeBtn">
<i class="bi bi-lock me-2"></i>Encode
</button>
@@ -317,7 +466,15 @@ if (rsaKeyQrInput) {
// Form submit loading state
document.getElementById('encodeForm').addEventListener('submit', function(e) {
const btn = document.getElementById('encodeBtn');
btn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Encoding...';
const selectedMode = document.querySelector('input[name="embed_mode"]:checked').value;
let modeLabel = selectedMode.toUpperCase();
if (selectedMode === 'dct') {
const outputFormat = document.querySelector('input[name="dct_output_format"]:checked')?.value || 'png';
modeLabel += ` → ${outputFormat.toUpperCase()}`;
}
btn.innerHTML = `<span class="spinner-border spinner-border-sm me-2"></span>Encoding (${modeLabel})...`;
btn.disabled = true;
});
@@ -338,12 +495,147 @@ messageInput.addEventListener('input', function() {
charCount.classList.toggle('text-danger', len > maxChars * 0.95);
});
// ============================================================================
// v3.0 - Capacity Comparison API
// ============================================================================
const carrierInput = document.getElementById('carrierInput');
const capacityPanel = document.getElementById('capacityPanel');
const carrierDimensions = document.getElementById('carrierDimensions');
const lsbCapacityBadge = document.getElementById('lsbCapacityBadge');
const dctCapacityBadge = document.getElementById('dctCapacityBadge');
const lsbCapacityDetail = document.getElementById('lsbCapacityDetail');
const dctCapacityDetail = document.getElementById('dctCapacityDetail');
const modeCapacityComparison = document.getElementById('modeCapacityComparison');
const capacityRatio = document.getElementById('capacityRatio');
let currentCapacity = null;
async function fetchCapacityComparison(file) {
const formData = new FormData();
formData.append('carrier', file);
try {
const response = await fetch('/api/compare-capacity', {
method: 'POST',
body: formData
});
if (response.ok) {
const data = await response.json();
if (data.success) {
currentCapacity = data;
updateCapacityDisplay(data);
}
}
} catch (err) {
console.error('Capacity comparison failed:', err);
}
}
function updateCapacityDisplay(data) {
// Update top panel
carrierDimensions.textContent = `${data.width} × ${data.height}`;
lsbCapacityBadge.textContent = `LSB: ${data.lsb.capacity_kb} KB`;
if (data.dct.available) {
dctCapacityBadge.textContent = `DCT: ${data.dct.capacity_kb} KB`;
dctCapacityBadge.classList.remove('bg-secondary');
dctCapacityBadge.classList.add('bg-info');
} else {
dctCapacityBadge.textContent = `DCT: N/A`;
dctCapacityBadge.classList.remove('bg-info');
dctCapacityBadge.classList.add('bg-secondary');
}
capacityPanel.classList.remove('d-none');
// Update advanced options panel
lsbCapacityDetail.textContent = `${data.lsb.capacity_kb} KB`;
dctCapacityDetail.textContent = data.dct.available ? `${data.dct.capacity_kb} KB` : 'N/A';
capacityRatio.textContent = data.dct.available
? `DCT is ${data.dct.ratio}% of LSB capacity`
: 'DCT mode not available';
modeCapacityComparison.classList.remove('d-none');
}
// Listen for carrier file selection
if (carrierInput) {
carrierInput.addEventListener('change', function() {
if (this.files && this.files[0]) {
fetchCapacityComparison(this.files[0]);
} else {
capacityPanel.classList.add('d-none');
modeCapacityComparison.classList.add('d-none');
currentCapacity = null;
}
});
}
// ============================================================================
// Mode card highlighting & DCT output format visibility
// ============================================================================
const lsbModeCard = document.getElementById('lsbModeCard');
const dctModeCard = document.getElementById('dctModeCard');
const modeLsb = document.getElementById('modeLsb');
const modeDct = document.getElementById('modeDct');
const dctOutputFormatGroup = document.getElementById('dctOutputFormatGroup');
const dctPngCard = document.getElementById('dctPngCard');
const dctJpegCard = document.getElementById('dctJpegCard');
const dctFormatPng = document.getElementById('dctFormatPng');
const dctFormatJpeg = document.getElementById('dctFormatJpeg');
function updateModeCardHighlight() {
// Mode cards
lsbModeCard.classList.toggle('border-primary', modeLsb.checked);
lsbModeCard.classList.toggle('border-2', modeLsb.checked);
dctModeCard.classList.toggle('border-info', modeDct.checked);
dctModeCard.classList.toggle('border-2', modeDct.checked);
// Show/hide DCT output format selector
if (dctOutputFormatGroup) {
dctOutputFormatGroup.classList.toggle('d-none', !modeDct.checked);
}
}
function updateDctFormatCardHighlight() {
if (dctPngCard && dctJpegCard) {
dctPngCard.classList.toggle('border-success', dctFormatPng.checked);
dctPngCard.classList.toggle('border-2', dctFormatPng.checked);
dctJpegCard.classList.toggle('border-warning', dctFormatJpeg.checked);
dctJpegCard.classList.toggle('border-2', dctFormatJpeg.checked);
}
}
modeLsb.addEventListener('change', updateModeCardHighlight);
modeDct.addEventListener('change', updateModeCardHighlight);
dctFormatPng?.addEventListener('change', updateDctFormatCardHighlight);
dctFormatJpeg?.addEventListener('change', updateDctFormatCardHighlight);
updateModeCardHighlight(); // Initial state
updateDctFormatCardHighlight(); // Initial state
// Advanced options chevron rotation
document.getElementById('advancedOptions').addEventListener('show.bs.collapse', function() {
document.getElementById('advancedChevron').classList.add('bi-chevron-up');
document.getElementById('advancedChevron').classList.remove('bi-chevron-down');
});
document.getElementById('advancedOptions').addEventListener('hide.bs.collapse', function() {
document.getElementById('advancedChevron').classList.remove('bi-chevron-up');
document.getElementById('advancedChevron').classList.add('bi-chevron-down');
});
// ============================================================================
// Drag & drop with preview for images
// ============================================================================
document.querySelectorAll('.drop-zone').forEach(zone => {
const input = zone.querySelector('input[type="file"]');
const label = zone.querySelector('.drop-zone-label');
const preview = zone.querySelector('.drop-zone-preview');
const isPayloadZone = zone.id === 'payloadDropZone';
const isCarrierZone = zone.id === 'carrierDropZone';
['dragenter', 'dragover'].forEach(evt => {
zone.addEventListener(evt, e => {
@@ -367,6 +659,11 @@ document.querySelectorAll('.drop-zone').forEach(zone => {
if (!isPayloadZone) {
showPreview(e.dataTransfer.files[0]);
}
// Trigger capacity check for carrier
if (isCarrierZone && e.dataTransfer.files[0]) {
fetchCapacityComparison(e.dataTransfer.files[0]);
}
}
});
@@ -420,6 +717,7 @@ function checkDuplicateFiles() {
document.querySelector('#carrierDropZone .drop-zone-label').innerHTML =
'<i class="bi bi-cloud-arrow-up fs-3 d-block mb-2 text-muted"></i>' +
'<span class="text-muted">Drop image or click to browse</span>';
capacityPanel.classList.add('d-none');
}
}
}
@@ -443,6 +741,11 @@ document.addEventListener('paste', function(e) {
targetInput.files = container.files;
targetInput.dispatchEvent(new Event('change'));
// Trigger capacity check if pasted to carrier
if (targetInput === carrierInput) {
fetchCapacityComparison(blob);
}
break;
}
}