From f5a82152394fde4d8f740f664ab7737b82861618 Mon Sep 17 00:00:00 2001
From: cashmere <cashmere@autistici.org>
Date: Tue, 28 Jul 2026 19:41:16 +0200
Subject: feat: GPUI desktop port foundation

- scene crate: full project/scene/element model, serde round-trip
  proven against the web SerializedProject shape
- transfer crate: .ocp zip container, cross-compat with web fflate
  archives proven in both directions
- storage crate: filesystem project store replacing IndexedDB,
  .ocp import/export
- media crate: ffmpeg-next 8 decoder (frames, audio, thumbnails,
  waveform summaries)
- playback crate: wall-clock anchored, frame-rounded playback clock
- gpu crate: native texture readback; compositor renders headless
  offscreen on Vulkan (spike test)
- flake devshell: rust toolchain, GPUI native deps, ffmpeg dev,
  bindgen clang args; GPUI hello-world builds
- port plan in notes/gpui-port.md
---
 rust/crates/commands/src/tracks.rs | 42 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 rust/crates/commands/src/tracks.rs

(limited to 'rust/crates/commands/src/tracks.rs')

diff --git a/rust/crates/commands/src/tracks.rs b/rust/crates/commands/src/tracks.rs
new file mode 100644
index 00000000..332a5e6b
--- /dev/null
+++ b/rust/crates/commands/src/tracks.rs
@@ -0,0 +1,42 @@
+use scene::{SceneTracks, Track};
+
+pub fn find_track<'a>(tracks: &'a SceneTracks, track_id: &str) -> Option<&'a Track> {
+    if tracks.main.id() == track_id {
+        return Some(&tracks.main);
+    }
+    tracks
+        .overlay
+        .iter()
+        .find(|track| track.id() == track_id)
+        .or_else(|| tracks.audio.iter().find(|track| track.id() == track_id))
+}
+
+pub fn find_track_mut<'a>(
+    tracks: &'a mut SceneTracks,
+    track_id: &str,
+) -> Option<&'a mut Track> {
+    if tracks.main.id() == track_id {
+        return Some(&mut tracks.main);
+    }
+    tracks
+        .overlay
+        .iter_mut()
+        .find(|track| track.id() == track_id)
+        .or_else(|| tracks.audio.iter_mut().find(|track| track.id() == track_id))
+}
+
+pub fn all_tracks(tracks: &SceneTracks) -> impl Iterator<Item = &Track> {
+    tracks
+        .overlay
+        .iter()
+        .chain(std::iter::once(&tracks.main))
+        .chain(tracks.audio.iter())
+}
+
+pub fn all_tracks_mut(tracks: &mut SceneTracks) -> impl Iterator<Item = &mut Track> {
+    tracks
+        .overlay
+        .iter_mut()
+        .chain(std::iter::once(&mut tracks.main))
+        .chain(tracks.audio.iter_mut())
+}
-- 
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