ReDrop

ProjectM (Milkdrop) Music Visualization in Rust.

Build and Run

cargo build --all -r
cargo run -r

Dependencies

• ProjectM: projectm

  sudo apt install build-essential cmake libgl1-mesa-dev mesa-common-dev libglm-dev

  On Windows, use vcpkg for GLEW:

  .\vcpkg install glew:x64-windows-static-md

• Video: egui, eframe

  • sudo apt-get install libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev libxkbcommon-dev libssl-dev

• Audio: cpal (TODO: Config Tips audio with ALSA in WSLg)

• File dialogs: rfd

TODO

ReDrop App

• Search Preset:
  • Search Categories
  • Hide Empty Categories
• Grid Layout: auto calcul columns
• Show Flat Preset: Align text to the left
• Change preset time interval on nBar (4 beat)
  160 bpm, 32 bar -> 48s [4 / ( (160 / 60) ) * 32]
• Set Window default size (persistence !?)

Playlist View in bottom

• Add
• Delete
• Current Preset (colored frame)
• Drag and Drop

Config View

• Auto fit content
• Shortcut table UI
• List Screen Resolutions
• List Audio Devices
• Option: Show presets in flat list or into a grid
• Option: Hide Categories (folders, subfolders)
• Option: Hide Cursor in FullScreen
• Option: Toggle fullscreen on Double Click (One Click for now)

Player App

• Sync FPS (Limit)
  emilk/egui#1109
  emilk/egui#342
  https://docs.rs/egui/latest/egui/util/struct.History.html
  https://github.com/projectM-visualizer/frontend-sdl2/blob/master/src/FPSLimiter.cpp
• Set projectM loading preset error Callback
• Add projectm_opengl_render_frame_fbo to crate projectM and test it.
  https://github.com/projectM-visualizer/projectm/blob/master/src/api/include/projectM-4/render_opengl.h
• Add Notification Label (for event, preset name)
• Add touch (waveform)

Config

• Check for hard and soft cut, preset_locked
  https://github.com/projectM-visualizer/projectm/blob/master/src/api/include/projectM-4/parameters.h
• Shortcut:
  • Next Preset (N) (Need Playlist)
  • Prev. Preset (P) (Need Playlist)
  • Preset Speed (LEFT/RIGHT) (Check if up/down fps change annimation speed !?)
  • Rating (+/-)
• Data validation, before loading
• config.toml in Home directory (.redrop/config.toml) or in current_dir ? (Where to write it by default ?!)

Preset

• Metadata (.redrop)
• Rating
• Screenshot Preview Image
• Mark warn (!) if error (stdout) on last play

Audio

• Check audio stereo format: cpal vs projectm (pcm), [l,r,l,r,..] or [l,l,..,r,r,..] ?!
  https://www.reddit.com/r/rust/comments/s0d65g/cpal_capturing_single_channel_out_of_2_channels/
• Select Audio Devices
• Audio Buffer Size
• Calculate audio buffer size with frame rate (fps) (48000hz / 60 fps = 800)
• Capture system Audio Output
  https://github.com/aizcutei/ruhear

Video

• List screen resolutions
• Aspect Ratio
• Zoom fullscreen

Future ideas

• Playlist
• Deck (Muliple Output)
• Timeline edition
• Ableton Link (Sync BPM with applications like Ableton Live, Bitwig Studio, NI Tracktor, and more.)
  projectM-visualizer/projectm#451
• Spout (Send output to applications like Resolume, Max, Processing, MadMapper, TouchDesigner and more.)
  https://spout.zeal.co/

Known bugs

• Both App crash on check_for_ipc_message if the other app (window) is closed (icp_channel: err, closed channel).
  And can't find the channel name if the application is subsequently reopened. (New channel is created..).
• ReDrop App doesn't receive IPC messages if the window is minimized on taskbar (not rendered)!
• Player App sometimes crashes:

  thread 'main' panicked at .cargo\registry\src\index.crates.io-6f17d22bba15001f\projectm-2.0.1-alpha\src\core.rs:725:13:
  Failed to borrow instance

• ReDrop App: In show_preset: Scroll (MouseWheel) not work with image_hovered
• Redrop App: Openned config FileDialog block the app and check_for_ipc_message in update
• ReDrop App: Can't randomize empty list send_random_preset_file (Show Label: "No preset found, check path in config !")

  thread 'main' panicked at cargo\registry\src\index.crates.io-6f17d22bba15001f\rand-0.8.5\src\rng.rs:134:9:
  cannot sample empty range

• Config UI: DragValue speed is not step !