scratch: round 2 (macOS Frameworks, playback mutations)

Author: Richie McIlroy

.github/workflows/verify-mutation-runs.yml

@@ -10,7 +10,7 @@ on:
       - ci/verify-mutation-runs
 
 concurrency:
-  group: verify-mutation-${{ github.ref_name }}
+  group: verify-mutation-${{ github.sha }}
   cancel-in-progress: false
 
 permissions:
@@ -32,21 +32,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - { name: lin-01, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "T01 T02 T03 T04" }
-          - { name: lin-02, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "T05 T06 T07 T08" }
-          - { name: lin-03, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "R01 R02 R03 R04" }
-          - { name: lin-04, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "R05 R06 R07 R08" }
-          - { name: lin-05, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "R09 R10 R11 E01" }
-          - { name: lin-06, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "E02 E03 E04 E05" }
-          - { name: lin-07, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "D01 D02 D03" }
-          - { name: lin-08, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "D04 D05 D06" }
-          - { name: lin-09, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "A01 A02 A03 A04" }
-          - { name: lin-10, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "A05 A06 A07 A08" }
-          - { name: lin-11, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "A09 A10 A11" }
-          - { name: lin-12, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "A12 A13 A14" }
-          - { name: lin-13, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "C01 C02 C03 C04 C05" }
-          - { name: lin-14, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "K01 K02 K03 K04 K05" }
-          - { name: lin-fresh, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "C01 C02 C03 C04 C05", fresh: true }
+          - { name: lin-p, runner: ubuntu-24.04, platform: linux, target: x86_64-unknown-linux-gnu, ids: "P01 P02 R12" }
           - { name: mac-01, runner: macos-15, platform: macos, target: aarch64-apple-darwin, ids: "D01 D02 D07" }
           - { name: mac-02, runner: macos-15, platform: macos, target: aarch64-apple-darwin, ids: "D08 D09 D10" }
           - { name: mac-03, runner: macos-15, platform: macos, target: aarch64-apple-darwin, ids: "C01 C02 C03" }
@@ -76,6 +62,14 @@ jobs:
         if: runner.os == 'macOS'
         uses: ./.github/actions/install-desktop-deps
 
+      # Test binaries in target/ci-verify/deps load FFmpeg from
+      # @executable_path/../Frameworks; setup.js only fills target/Frameworks.
+      - name: Frameworks for the ci-verify profile (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          mkdir -p target/ci-verify
+          ln -sfn "$GITHUB_WORKSPACE/target/Frameworks" target/ci-verify/Frameworks
+
       - name: Mutations
         shell: bash
         run: |
@@ -103,14 +97,14 @@ jobs:
 
   gpui:
     name: ${{ matrix.name }}
+    if: false
     runs-on: ubuntu-24.04
     timeout-minutes: 300
     strategy:
       fail-fast: false
       matrix:
         include:
-          - { name: gpui-01, ids: "U01 U02 U03 U04 U05 K06" }
-          - { name: gpui-02, ids: "U06 U07 U08 U09 U10" }
+          - { name: gpui-none, ids: "" }
     env:
       CARGO_PROFILE_DEV_DEBUG: "0"
       CARGO_INCREMENTAL: "1"

scripts/verify/mutation/mutations.py

@@ -629,3 +629,32 @@ def mutation(id, area, title, history, file, edits, platforms, suites=None, visi
       "        progress((offset as f64 / file_size as f64).min(1.0));\n", 1)],
     ["linux"], ["gpui"],
 )
+
+# ---------------------------------------------------------------- editor real-time playback loop
+PB = "crates/editor/src/playback.rs"
+mutation(
+    "P01", "playback", "playback prefetch decodes one frame ahead of the frame number it is stored under",
+    "stale/shifted prefetch (play-start latency work, #2492)",
+    PB,
+    [("                    let prefetch_time = frame_num as f64 / fps_f64;\n",
+      "                    let prefetch_time = (frame_num + 1) as f64 / fps_f64;\n", 1)],
+    ["linux"],
+)
+mutation(
+    "P02", "playback", "real-time playback renders transitions with the blend progress reversed",
+    "transition blend weights (preview only)",
+    PB,
+    [("        progress: progress as f32,\n    })\n}\n",
+      "        progress: 1.0 - progress as f32,\n    })\n}\n", 1)],
+    ["linux"],
+)
+
+mutation(
+    "R12", "render", "export NV12 conversion drops the limited-range luma offset (picture 16 levels darker)",
+    "colour range (full vs limited)",
+    "crates/rendering/src/shaders/rgba_to_nv12.wgsl",
+    [("    return u32(clamp(16.0 + 65.481 * r + 128.553 * g + 24.966 * b, 0.0, 255.0));\n",
+      "    return u32(clamp(65.481 * r + 128.553 * g + 24.966 * b, 0.0, 255.0));\n", 1)],
+    ["linux"],
+    RENDER_ENGINE,
+)