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@github-actions github-actions released this 14 Mar 00:27
· 1728 commits to master since this release
v1.4.1
df07d13

Nexen v1.4.1

A major feature and stability release with a complete TAS Editor, movie format system, 80+ performance optimizations, 300+ new tests, and CI fixes across all platforms.

TAS Editor (New)

The TAS Editor is now fully functional with a rich feature set:

  • Piano Roll View -- Visual timeline for frame-by-frame editing with batch paint and multi-selection
  • Full Undo/Redo System -- Every operation (toggle, paint, insert, delete, clear, fork) is undoable with O(1) incremental updates
  • Greenzone System -- Instant seeking with automatic savestates and visual greenzone indicator
  • Branches -- Fork, compare, and load alternate TAS strategies
  • Input Recording -- Capture, insert, and overwrite modes with branch support
  • Lua Scripting -- Automate TAS workflows via TasLuaApi with full undo integration
  • UI Dialogs -- GoToFrame, Seek, Comment, Greenzone settings, Branch manager
  • Multi-Selection & Context Menu -- Bulk editing with right-click actions
  • Search -- Find specific inputs in the piano roll
  • Metadata Display -- View movie metadata alongside the editor

Movie System (New)

Full movie recording, playback, and format conversion:

  • Nexen Movie Format (.nexen-movie) -- ZIP-based format with JSON metadata, input log, savestate, and SRAM
  • Movie Recording & Playback -- Record/replay inputs frame-by-frame with rerecording support
  • Multi-Format Import/Export:
    • BK2 (BizHawk) -- Read/Write
    • FM2 (FCEUX) -- Read/Write
    • LSMV (lsnes) -- Read/Write
    • SMV (Snes9x) -- Read
    • VBM (VisualBoyAdvance) -- Read
    • GMV (Gens) -- Read
  • Bug Fixes: LSMV stream leak, BK2 command-field parse bug, HistoryViewer time >59min

Performance (80+ Optimizations)

Extensive hot-path optimizations across the C++ and .NET codebases:

C++ Core

  • std::format for controller text state, no-alloc parsing, reserve() pre-allocation
  • std::erase, ranges::contains, C++20 contains() modernization
  • Zero-copy stringstream::view(), ends_with, RewindData::str() optimization
  • Eliminate redundant recursive locks in SetTextState/GetTextState/InvertBit
  • SaveStateManager buffer reuse, CheatManager const-correctness
  • ControllerHub const ref, GetControlDevices const ref, nodiscard audit
  • Pre-compute HexEditor format string, std::endl removal
  • NotificationManager send snapshot and registration lock overhead reduction

.NET / TAS

  • InputFrame span-based parsing with StringBuilder and OrdinalIgnoreCase
  • FrozenDictionary/FrozenSet for static readonly collections
  • TryGetValue pattern replacing ContainsKey + indexer double-lookups
  • ZipReader direct extraction, PianoRoll allocation removal
  • MovieData CRC32 batched buffer, InputFrame.Clone skip-init
  • O(1) StateLoaded, property notification batching, LINQ elimination
  • Incremental ObservableCollection updates for Paste and Fork
  • Zero-alloc PianoRoll cache eviction in render path

Testing (+300 New Tests)

Test count grew from ~2400 to 2790 (1633 C++ + 826 .NET + 331 MovieConverter):

  • 75 TasLuaApi tests + fix lazy property init + fix branch creation bug
  • 89 format roundtrip tests for InputFrame parsing
  • 79 ViewModel integration tests for TasEditorViewModel
  • 61 API doc generation + guard tests
  • 58 ViewModel branch, controller layout, and frame navigation tests
  • 30 StringUtilities and ControlDeviceState tests
  • 29 C++ SetTextState/GetTextState round-trip tests
  • 24 C++ TAS/movie tests (ControllerHub, RewindData, movie format)
  • 23 greenzone, clipboard, clone, and frame operation tests
  • 14 TAS recording mode and undo/redo state machine tests

CI / Build Fixes

All CI builds were previously broken. Three separate issues were diagnosed and fixed:

  1. Pansy.Core project reference -- Added git clone of the Pansy repo to all CI jobs (the UI project references Pansy.Core via a sibling directory path)
  2. std::jthread to std::thread -- libc++ (used by clang on Linux) doesn't support std::jthread; replaced with std::thread (the stop_token parameter was unused)
  3. HdNesPack template destructors -- Added explicit destructor template instantiations for HdNesPack<1> through HdNesPack<10> (clang linker couldn't find them)

All 10 CI jobs now pass: Windows (x64, AoT), Linux gcc (x64, ARM64), Linux clang (x64, ARM64, AoT), AppImage (x64, ARM64), macOS ARM64.

Documentation

  • Comprehensive README overhaul with accurate download links, expanded documentation tables
  • New Movie System section documenting all supported formats
  • New Emulation Core Documentation section (NES, SNES, GB/GBA, SMS/PCE/WS, Lynx)
  • Expanded Developer Documentation (14 docs covering all subsystems)
  • TAS algorithm reference documentation with undo system design

Supported Systems

NES, SNES, Game Boy / GBC, Game Boy Advance, Sega Master System / Game Gear, PC Engine / TurboGrafx-16, WonderSwan / WSC, Atari Lynx

Downloads

Platform File Size
Windows x64 Nexen-Windows-x64-v1.4.1.exe 31 MB
Windows x64 (AOT) Nexen-Windows-x64-AoT-v1.4.1.exe 70 MB
Linux x64 AppImage Nexen-Linux-x64-v1.4.1.AppImage 78 MB
Linux ARM64 AppImage Nexen-Linux-ARM64-v1.4.1.AppImage 74 MB
Linux x64 (clang) Nexen-Linux-x64-v1.4.1.tar.gz 20 MB
Linux x64 (gcc) Nexen-Linux-x64-gcc-v1.4.1.tar.gz 18 MB
Linux ARM64 (clang) Nexen-Linux-ARM64-v1.4.1.tar.gz 20 MB
Linux ARM64 (gcc) Nexen-Linux-ARM64-gcc-v1.4.1.tar.gz 18 MB
Linux x64 (AOT) Nexen-Linux-x64-AoT-v1.4.1.tar.gz 36 MB
macOS ARM64 Nexen-macOS-ARM64-v1.4.1.zip 61 MB

Note: Linux tarball builds require SDL2 (sudo apt install libsdl2-2.0-0). macOS: Right-click then Open on first launch.

Full Changelog: v1.4.0...v1.4.1

Assets 12
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