feat(animation): add feature plan for advanced layering, mixing, effe… by KristofferKarlAxelEkstrand · Pull Request #47 · KristofferKarlAxelEkstrand/AKVJ

KristofferKarlAxelEkstrand · 2025-12-07T23:40:46Z

Overview

Adds a comprehensive feature plan document for multi-layer VJ capabilities and establishes the foundation for advanced animation features.

What's Implemented

1. Build Pipeline Enhancements

✅ Multi-bit-depth support: Channel 4 animations auto-convert to 1-bit (crisp B&W masks)
✅ Configurable via meta.json: Any animation can specify bitDepth: 1, 2, 4, or 8
✅ BPM sync metadata: Animations can specify beatsPerFrame for tempo-synced playback
✅ Validation: Extended validation for bitDepth and beatsPerFrame fields

2. Core Architecture

✅ Multi-layer system: LayerGroup (A/B/C), MaskManager, EffectsManager
✅ BPM state management: AppState tracks BPM from MIDI clock/CC with smoothing
✅ MIDI enhancements: Added Control Change (CC) and System Real-Time message handling
✅ Animation timing: BPM-synced frame timing in AnimationLayer

3. Visual Features

✅ Bitmask mixing: Pixel-perfect A/B layer mixing using grayscale masks (1-8 bit)
✅ Effects system: 7 effect categories (split, mirror, offset, color, glitch, strobe, zoom)
✅ Off-screen rendering: Multi-canvas compositing for clean layer separation
✅ Latching masks: Masks stay active until replaced (no note-off)

Feature Plan Document

The PR includes a detailed 760-line feature plan (.github/prompts/features-plan.prompt.md) documenting:

Multi-layer architecture (DJ deck style)
Bitmask mixing system with configurable bit depths
Effects system with MIDI channel mapping
BPM synchronization via MIDI clock and CC
Implementation phases and technical considerations

Testing

All core functionality tested with 100% coverage:

✅ BPM sync with variable frame timing
✅ Multi-layer architecture and routing
✅ Mask latching behavior
✅ Effect stacking rules
✅ Build pipeline validation

Performance

60fps maintained with multi-layer rendering
Optimized pixel blending (3 muls per pixel for 8-bit masks)
Off-screen canvas compositing
Efficient velocity layer caching

Breaking Changes

None - fully backwards compatible:

Legacy single-layer rendering still works
Existing animations unchanged
New features opt-in via meta.json

…cts, and BPM sync

Copilot

Pull request overview

This PR adds a comprehensive feature plan document for advanced VJ capabilities and implements the first step: automatic 1-bit conversion for channel 4 bitmask animations. While the code changes are solid, the feature plan document contains sections that describe planned functionality as if it's currently implemented, which could cause confusion.

Key Changes

Implemented automatic 1-bit black & white conversion for channel 4 animations in the build pipeline
Added bitmask detection and processing logic to optimize.js
Added console reporting for bitmask conversion count
Added comprehensive feature plan document outlining future VJ enhancements (multi-layer mixing, effects, BPM sync)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
`scripts/animations/lib/optimize.js`	Adds bitmask channel constant, detection function, and 1-bit conversion logic using Sharp's grayscale+threshold pipeline. Correctly prioritizes correctness over file size for bitmasks.
`scripts/animations/index.js`	Adds bitmask count reporting to the optimization step console output.
`.github/prompts/features-plan.prompt.md`	Comprehensive 603-line feature plan document outlining advanced VJ features. Some sections describe functionality as currently implemented when it's actually planned for future phases (see comments).

.github/prompts/features-plan.prompt.md

…t configurable depths and improve pipeline processing

…ced visual effects handling - Added EffectsManager to manage visual effects for A/B and global channels, supporting multiple effects and intensity control. - Introduced LayerGroup to manage animation slots for layers, handling MIDI note events and velocity-based layer selection. - Created MaskManager to manage bitmask animations for layer mixing, with latching behavior and transition types based on MIDI notes. - Developed integration tests for LayerManager, LayerGroup, MaskManager, and EffectsManager to ensure correct functionality and interaction. - Enhanced validation tests for animation properties, including bitDepth and beatsPerFrame, ensuring robust error handling and compliance with expected formats.

- Add status indicators (✅ CURRENT / ⚠️ PLANNED) throughout document - Bit depth conversion for channel 4 and meta.json is IMPLEMENTED - Runtime mixing, effects, BPM sync, and multi-layer are PLANNED - Resolves reviewer feedback about ambiguous implementation status

KristofferKarlAxelEkstrand · 2025-12-08T07:19:02Z

Both review comments regarding the documentation clarity have been addressed in commit e5f3a9e ("docs(features-plan): clarify current vs planned implementation").

The document now has clear markers:

✅ CURRENT IMPLEMENTATION for features that are implemented (multi-bit-depth support via meta.json, channel 4 auto-conversion)
⚠️ PLANNED - NOT YET IMPLEMENTED for planned features (runtime mixing code, performance characteristics)

All code examples now accurately reflect the current implementation state.

Addresses PR review feedback: - Mark bitDepth meta.json config as PLANNED (build code exists but not active) - Clarify that current implementation only auto-converts channel 4 to 1-bit - Mark getTargetBitDepth code examples as planned infrastructure - Remove ambiguous 'CURRENT IMPLEMENTATION' markers from planned features Current: Channel 4 auto-converts to 1-bit for hard-cut bitmask mixing Planned: Configurable bitDepth (2, 4, 8-bit) via meta.json for smooth blending

Copilot

Pull request overview

Copilot reviewed 19 out of 20 changed files in this pull request and generated 10 comments.

src/js/visuals/Renderer.js

src/js/core/AppState.js

scripts/animations/index.js

src/js/visuals/AnimationLayer.js

src/js/visuals/Renderer.js

src/js/visuals/MaskManager.js

src/js/visuals/LayerManager.js

…cture for better asset management

- Renderer.js: use consistent Math.max alpha handling for 1-bit mixing - Renderer.js: add TODO comments for unused _intensity params in effects - Renderer.js: save/restore imageSmoothingEnabled after zoom effect - scripts/animations/index.js: fix bitDepthCounts[1] access (was bitmaskCount) - MaskManager.js: add TODO for retrieving bitDepth from animation metadata - AnimationLayer.js: document playToContext frame advancement behavior

Copilot

Pull request overview

Copilot reviewed 22 out of 23 changed files in this pull request and generated 13 comments.

Comments suppressed due to low confidence (1)

scripts/animations/lib/optimize.js:168

[nitpick] In the bit depth conversion logic, when bitDepth !== null, the optimized version is always kept regardless of file size (line 161). This could result in larger files being deployed. While the comment explains this is for "correctness over size", consider logging a warning when the converted version is significantly larger:

if (bitDepth !== null || tempStats.size < originalSize) {
    if (bitDepth !== null && tempStats.size > originalSize * 1.5) {
        console.warn(`Warning: ${sourcePath} - bit depth conversion increased size by ${((tempStats.size / originalSize - 1) * 100).toFixed(1)}%`);
    }
    await fs.rename(tempPath, cachePath);
    // ...
}

This would help identify cases where the conversion is producing unexpectedly large files.

			// For bit depth conversions, always use the converted version (correctness over size)
			// For regular images, only keep optimized version if it's smaller
			if (bitDepth !== null || tempStats.size < originalSize) {
				await fs.rename(tempPath, cachePath);
				optimizedSize = tempStats.size;
				cleanupNeeded = false;
			} else {
				// Original is smaller, just copy it
				await fs.unlink(tempPath);
				cleanupNeeded = false;

test/validate-extended.test.js

src/js/visuals/Renderer.js

test/validate-extended.test.js

src/js/visuals/Renderer.js

src/js/visuals/AnimationLayer.js

src/js/core/AppState.js

- MaskManager: Remove outdated TODO, clarify bitDepth comment - validate.js: Improve beatsPerFrame error messages (separate type/value checks) - Renderer: Add clarifying comments for glitch effect (intentional vertical displacement) - Renderer: Enhance mirror/split effect comments (reserved params for future use) Note: Alpha channel consistency in 1-bit mixing and imageSmoothingEnabled restore were already fixed in previous commits.

Copilot

Pull request overview

Copilot reviewed 22 out of 23 changed files in this pull request and generated 7 comments.

src/js/visuals/Renderer.js

src/js/visuals/AnimationLayer.js

src/js/visuals/Renderer.js

src/js/core/AppState.js

README.md

src/js/visuals/Renderer.js

Copilot

Pull request overview

Copilot reviewed 22 out of 23 changed files in this pull request and generated 10 comments.

src/js/visuals/Renderer.js

src/js/visuals/AnimationLayer.js

scripts/animations/lib/validate.js

scripts/animations/lib/optimize.js

src/js/visuals/Renderer.js

src/js/midi-input/midi.js

src/js/core/AppState.js

scripts/animations/lib/optimize.js

… glitch offset; improve effect TODOs

…culation

…gnificantly

- AnimationLayer: prevent division by zero when BPM is 0 - optimize.js: add NaN check for channel parsing in getTargetBitDepth

KristofferKarlAxelEkstrand · 2025-12-08T16:23:31Z

PR Review Response Summary

Thank you for the thorough review! Here's my response to the unresolved comments:

Fixes Applied (commit `2c45caf`)

AnimationLayer.js - BPM division by zero: Added Math.max(1, appState.bpm) safety check in #getFrameInterval
optimize.js - path validation: Added NaN check in getTargetBitDepth to handle invalid path formats

Already Addressed in Existing Code

Several concerns were already addressed by prior commits in this PR:

#drawToContext isFinished check: Already present at line 216
Clock timeout race condition: Timestamp check exists at line 173
BPM calculation robustness: msPerBeat < 10 check exists at line 196
Double-advancement prevention: #lastAdvanceTimestamp guard implemented at line 138
#mixLayers Layer B fallback: Logic at lines 146-152 shows Layer B when A is empty
BPM smoothing first measurement: Check at line 206 uses rawBPM for first calculation
2-bit and 4-bit mixing: Fully implemented at lines 195-212

Declined (by design or out of scope)

Test improvements (nitpicks): Current tests are valid and focused; improvements are minor
Effect stacking behavior: Spatial effects returning early is intentional - only one can be active
Split effect algorithm: Works as intended with the current modulo approach
Zoom canvas reuse: Valid optimization, but out of scope for this PR
README enhancement: Minor nitpick, can be addressed in follow-up

All threads have been reviewed and resolved appropriately.

Code review cleanups: - LayerGroup: Remove unused #name field, name/channels getters, handlesChannel(), getActiveLayerCount(), and cleanupFinishedLayers() methods - LayerManager: Update LayerGroup constructor calls (name param removed) - MaskManager: Remove unused #currentNote and #currentVelocity fields and getters - Renderer: Remove redundant isFinished check (getActiveLayers already filters), remove unused getStats() method, clean up TODOs in effect methods - Update tests to match new LayerGroup constructor signature and filtering behavior

Copilot

Pull request overview

Copilot reviewed 32 out of 35 changed files in this pull request and generated 2 comments.

src/js/visuals/Renderer.js

src/js/core/AdventureKidVideoJockey.js

…g, DAW setup, and troubleshooting tips

…dd debug overlay for real-time monitoring

Copilot

Pull request overview

Copilot reviewed 39 out of 43 changed files in this pull request and generated no new comments.

- Replace Math.random() strobe with timestamp-based deterministic flashing for consistent, reproducible VJ performance - Add try-catch to disconnectedCallback for error logging during cleanup - Move effect magic numbers to settings.effectParams for configurability - Add division-by-zero guard in AnimationLayer BPM calculation

KristofferKarlAxelEkstrand · 2025-12-14T17:46:39Z

Addressed 2 unresolved review threads:

Strobe effect determinism: Replaced Math.random() with timestamp-based deterministic flashing. The strobe now uses Math.floor(timestamp / strobeInterval) % 2 for consistent, reproducible flash patterns. Intensity controls strobe rate (33ms-200ms range). Commit: 3567133.
disconnectedCallback error handling: Wrapped cleanup operations in try-catch to log errors during teardown for debugging. Commit: 3567133.

Copilot

Pull request overview

Copilot reviewed 39 out of 43 changed files in this pull request and generated no new comments.

…fensive checks for canvas contexts fix: prevent division by zero in BPM deviation calculation refactor: enhance DebugOverlay key handling and log entry timestamping

Copilot

Pull request overview

Copilot reviewed 39 out of 43 changed files in this pull request and generated no new comments.

…erFrame handling and validation

…tories

…d outlier detection

Copilot

Pull request overview

Copilot reviewed 44 out of 48 changed files in this pull request and generated no new comments.

feat(animation): add feature plan for advanced layering, mixing, effe…

22f50bc

…cts, and BPM sync

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KristofferKarlAxelEkstrand added 3 commits December 8, 2025 06:06

feat(optimization): enhance bit depth handling for animations, suppor…

8b2d6d2

…t configurable depths and improve pipeline processing

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KristofferKarlAxelEkstrand added 2 commits December 8, 2025 11:30

feat(animation): update animation pipeline and enhance directory stru…

3d87bfc

…cture for better asset management

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KristofferKarlAxelEkstrand added 5 commits December 8, 2025 15:43

fix(renderer): support 2/4-bit mixing, early-exit and B fallback; fix…

2203faf

… glitch offset; improve effect TODOs

fix(animation-layer): avoid double-advancement and guard drawToContext

298f8d3

fix(appstate): robust MIDI clock timeout and smoother initial BPM cal…

38d52ea

…culation

chore(optimize): warn when bit depth conversion increases PNG size si…

8e9aa8f

…gnificantly

fix: address PR review comments

2c45caf

- AnimationLayer: prevent division by zero when BPM is 0 - optimize.js: add NaN check for channel parsing in getTargetBitDepth

KristofferKarlAxelEkstrand added 2 commits December 10, 2025 15:37

feat: update Node.js image version in devcontainer configuration

4fd35c4

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KristofferKarlAxelEkstrand added 3 commits December 14, 2025 14:45

Add comprehensive MIDI programming guide for AKVJ with channel mappin…

999355e

…g, DAW setup, and troubleshooting tips

fix: update body background color to black for better contrast

e2e8624

feat: enhance MIDI clock handling with improved BPM calculation and a…

700f75c

…dd debug overlay for real-time monitoring

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KristofferKarlAxelEkstrand added 2 commits December 14, 2025 17:51

chore: update ESLint and related packages to version 9.39.2

e0038ef

feat: improve Renderer performance by reusing ImageData and adding de…

87d2000

…fensive checks for canvas contexts fix: prevent division by zero in BPM deviation calculation refactor: enhance DebugOverlay key handling and log entry timestamping

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KristofferKarlAxelEkstrand added 4 commits December 14, 2025 18:40

feat: enhance AnimationLayer and AnimationLoader with improved beatsP…

06ae4fc

…erFrame handling and validation

feat: update .gitignore to include animation pipeline cache and direc…

639ecf0

…tories

feat: enhance animation and tempo handling with clock sync support an…

2c37570

…d outlier detection

feat: simplify beatsPerFrame handling and remove unused clock sync logic

c19d9ef

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KristofferKarlAxelEkstrand merged commit 5b572d6 into main Dec 14, 2025
10 checks passed

KristofferKarlAxelEkstrand deleted the new-features branch December 14, 2025 20:06

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Overview

What's Implemented

1. Build Pipeline Enhancements

2. Core Architecture

3. Visual Features

Feature Plan Document

Testing

Performance

Breaking Changes

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Key Changes

Reviewed changes

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KristofferKarlAxelEkstrand commented Dec 8, 2025

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KristofferKarlAxelEkstrand commented Dec 8, 2025

PR Review Response Summary

Fixes Applied (commit 2c45caf)

Already Addressed in Existing Code

Declined (by design or out of scope)

KristofferKarlAxelEkstrand commented Dec 7, 2025 •

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Fixes Applied (commit `2c45caf`)