TASK 51 slice 3: per-scene webcam BackgroundEffect + BackgroundStrength on WebcamSceneConfig, persisted via additive guarded columns; radio-pill bools RemoveBackground/BlurBackground (Unit: bg-effect config)
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@@ -165,7 +165,7 @@ public partial class LayoutStore : IDisposable
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cmd.CommandText = """
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SELECT SceneId, WebcamId, IsVisible, X, Y, Width, Height, Opacity,
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ClipShape, IsMirrored, BorderColor, BorderOpacity, BorderWidth, BorderAnimation,
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RectWidth, RectHeight, SortOrder
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RectWidth, RectHeight, SortOrder, BackgroundEffect, BackgroundStrength
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FROM WebcamSceneConfig ORDER BY SortOrder
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""";
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using var reader = cmd.ExecuteReader();
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@@ -190,6 +190,8 @@ public partial class LayoutStore : IDisposable
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BorderAnimation = Enum.TryParse<BorderAnimation>(reader.GetString(13), out var anim) ? anim : BorderAnimation.None,
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RectWidth = reader.IsDBNull(14) ? null : reader.GetDouble(14),
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RectHeight = reader.IsDBNull(15) ? null : reader.GetDouble(15),
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BackgroundEffect = Enum.TryParse<BackgroundEffect>(reader.GetString(17), out var effect) ? effect : BackgroundEffect.None,
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BackgroundStrength = reader.GetDouble(18),
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};
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if (!configsByScene.TryGetValue(sceneId, out var list))
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configsByScene[sceneId] = list = new List<(WebcamSceneConfig, int)>();
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@@ -75,6 +75,8 @@ public partial class LayoutStore : IDisposable
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BorderOpacity REAL NOT NULL DEFAULT 1,
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BorderWidth INTEGER NOT NULL DEFAULT 0,
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BorderAnimation TEXT NOT NULL DEFAULT 'None',
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BackgroundEffect TEXT NOT NULL DEFAULT 'None',
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BackgroundStrength REAL NOT NULL DEFAULT 0.5,
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SortOrder INTEGER NOT NULL DEFAULT 0,
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PRIMARY KEY (SceneId, WebcamId)
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);
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@@ -360,6 +362,21 @@ public partial class LayoutStore : IDisposable
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cmd.CommandText = "ALTER TABLE WebcamSceneConfig ADD COLUMN RectHeight REAL;";
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cmd.ExecuteNonQuery();
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}
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// TASK 51: per-webcam background effect + strength (additive, no version bump).
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if (!columns.Contains("BackgroundEffect"))
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{
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using var cmd = _connection.CreateCommand();
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cmd.CommandText = "ALTER TABLE WebcamSceneConfig ADD COLUMN BackgroundEffect TEXT NOT NULL DEFAULT 'None';";
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cmd.ExecuteNonQuery();
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}
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if (!columns.Contains("BackgroundStrength"))
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{
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using var cmd = _connection.CreateCommand();
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cmd.CommandText = "ALTER TABLE WebcamSceneConfig ADD COLUMN BackgroundStrength REAL NOT NULL DEFAULT 0.5;";
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cmd.ExecuteNonQuery();
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}
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}
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// v2 → v3: the webcam leaves the Source table. Any webcam Source rows become
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@@ -209,10 +209,10 @@ public partial class LayoutStore : IDisposable
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INSERT INTO WebcamSceneConfig
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(SceneId, WebcamId, IsVisible, X, Y, Width, Height, Opacity,
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ClipShape, IsMirrored, BorderColor, BorderOpacity, BorderWidth, BorderAnimation,
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RectWidth, RectHeight, SortOrder)
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RectWidth, RectHeight, SortOrder, BackgroundEffect, BackgroundStrength)
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VALUES ($sceneId, $webcamId, $isVisible, $x, $y, $w, $h, $opacity,
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$clip, $mirrored, $borderColor, $borderOpacity, $borderWidth, $borderAnimation,
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$rectWidth, $rectHeight, $sort)
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$rectWidth, $rectHeight, $sort, $bgEffect, $bgStrength)
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""";
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cmd.Transaction = tx;
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var sceneIdP = cmd.Parameters.Add("$sceneId", SqliteType.Text);
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@@ -232,6 +232,8 @@ public partial class LayoutStore : IDisposable
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var rectWidthP = cmd.Parameters.Add("$rectWidth", SqliteType.Real);
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var rectHeightP = cmd.Parameters.Add("$rectHeight", SqliteType.Real);
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var sortP = cmd.Parameters.Add("$sort", SqliteType.Integer);
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var bgEffectP = cmd.Parameters.Add("$bgEffect", SqliteType.Text);
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var bgStrengthP = cmd.Parameters.Add("$bgStrength", SqliteType.Real);
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foreach (var scene in scenes)
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{
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@@ -239,6 +241,8 @@ public partial class LayoutStore : IDisposable
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foreach (var element in scene.Elements)
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{
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if (element is not WebcamSceneConfig config) { z++; continue; }
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bgEffectP.Value = config.BackgroundEffect.ToString();
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bgStrengthP.Value = config.BackgroundStrength;
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sceneIdP.Value = scene.Id;
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webcamIdP.Value = config.WebcamId;
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visibleP.Value = config.IsVisible ? 1 : 0;
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+1
-1
@@ -14,7 +14,7 @@ External-facing logic: YouTube API, persistence. See
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| `AlertRenderer.cs` | **The alert rasterizer (TASK 43, 2026-09-24):** renders one event's celebration animation into a BGRA `VideoFrame` — SIX DISTINCT animations (SuperChat slide-up/shine/count-up, SuperSticker scale-pop, NewMember drop-in/flash-band, MemberGift slide-left/chip-fan, GiftReceived confetti scale-in, MemberMilestone rise/growth-bar), enter/hold/exit phases, brand line on every card. **Still the fallback** when no alert clip is playable (TASK 47) |
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| `AlertOverlayLayer.cs` | **The native alert-box component (TASK 43; video branch TASK 47):** event queue (cap 10) + 33ms dispatch ticker + `RenderFrame` cache-first live path + `UpdatePreview`; **`Advance(double)` is the deterministic test clock** (tests never start the timer); `ChatEventKind.None` rows (sub mentions) never enqueue; idle = transparent (null frame). Since TASK 47 a clip branch owns `IAlertClipDecoder` per play — ctor seams `(clipDecoderFactory, clipPathResolver, audioSink)`, fade in/out over `FadeDurationSeconds = 0.30` (straight-alpha copies + volume×fade audio), EOF freeze-frame → drain, and `AlertTickerFrame` composes the scrolling message strip |
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| `AlertClipDecoder.cs` | **Per-play alert video decoder (TASK 47):** `IAlertClipDecoder` (Start/Stop/Dispose + `FrameAvailable`/`AudioReady`/`Completed`) + ffmpeg child emitting `rawvideo bgra` (`-vf scale=W:H`, read via `RawVideoFrameReader`) and `f32le -ar 48000 -ac 2` on a **carry-buffer** audio loop (float boundary straddles never drop samples), both real-time paced; bgra is opaque (layer owns alpha). One-shot lifetime — created per alert, disposed at drain; tests inject a fake |
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| `LayoutStore.cs` | SQLite persistence (`Microsoft.Data.Sqlite`) at `%APPDATA%\ytLlive\ytLlive.db`; assets stored as BLOBs keyed by SHA-256 content hash; save/open layout files; schema `user_version` 10 (`Source.ClipShape`/`IsMirrored` via `ALTER TABLE` for pre-v2 DBs; v3 = singleton `Webcam` + per-scene `WebcamSceneConfig`, migrated idempotently **without backfill** — the stale `Source.DeviceId` column remains but is no longer read/written; v4 = `WebcamSceneConfig.RectWidth`/`RectHeight`, the pre-Round rect for the round-to-rect restore; v5 = `Source.IsBackdrop` + `Source.CaptureKey`, the live-capture backdrop; v6 = `Scene.HasBackdrop` — Live-only policy, one-time backfill turns Starting/BRB/Chat/Ending off + drops their backdrop sources; v9→v10 (TASK 39) = `YppSnapshot` history table; all later columns stay additive guarded ALTERs — TASK 47 adds the five alert `Source` columns (`AlertVideoAssetId`/`AlertVideoPath`/`AlertUseDefaultVideo`/`AlertShowTicker`/`AlertVideoVolume`) without a version bump; `MainViewModel.NormalizeBackgrounds` re-normalizes on every load — TASK 25: one locked "Background" per canonical screen (static art everywhere, DisplayCapture on Live), duplicates dropped, index 0, orphaned `BackgroundUseDefault_*`/`BackgroundPath_*` Settings keys purged at save). Settings key/value table holds app state: `MicSourceName`, `ReusableStream` (TASK 9 — the cached reusable stream's id/address/name so the pump has its RTMP URL at startup), `AlertDefaultVideoAssetId` (TASK 47 — the stamped built-in alert clip's asset row; save's prune exempts it via UNION) |
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| `LayoutStore.cs` | SQLite persistence (`Microsoft.Data.Sqlite`) at `%APPDATA%\ytLlive\ytLlive.db`; assets stored as BLOBs keyed by SHA-256 content hash; save/open layout files; schema `user_version` 10 (`Source.ClipShape`/`IsMirrored` via `ALTER TABLE` for pre-v2 DBs; v3 = singleton `Webcam` + per-scene `WebcamSceneConfig`, migrated idempotently **without backfill** — the stale `Source.DeviceId` column remains but is no longer read/written; v4 = `WebcamSceneConfig.RectWidth`/`RectHeight`, the pre-Round rect for the round-to-rect restore; v5 = `Source.IsBackdrop` + `Source.CaptureKey`, the live-capture backdrop; v6 = `Scene.HasBackdrop` — Live-only policy, one-time backfill turns Starting/BRB/Chat/Ending off + drops their backdrop sources; v9→v10 (TASK 39) = `YppSnapshot` history table; all later columns stay additive guarded ALTERs — TASK 51 adds `WebcamSceneConfig.BackgroundEffect`/`BackgroundStrength`; TASK 47 adds the five alert `Source` columns (`AlertVideoAssetId`/`AlertVideoPath`/`AlertUseDefaultVideo`/`AlertShowTicker`/`AlertVideoVolume`) without a version bump; `MainViewModel.NormalizeBackgrounds` re-normalizes on every load — TASK 25: one locked "Background" per canonical screen (static art everywhere, DisplayCapture on Live), duplicates dropped, index 0, orphaned `BackgroundUseDefault_*`/`BackgroundPath_*` Settings keys purged at save). Settings key/value table holds app state: `MicSourceName`, `ReusableStream` (TASK 9 — the cached reusable stream's id/address/name so the pump has its RTMP URL at startup), `AlertDefaultVideoAssetId` (TASK 47 — the stamped built-in alert clip's asset row; save's prune exempts it via UNION) |
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| `VideoFrame.cs` | Normalized CPU frame seam (`Width`/`Height`/tightly-packed BGRA `byte[]`) — the only pixel type the rest of the app knows about; future capture sources (screen, background-removed webcam) feed the same seam |
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| `BackgroundEffects/IPersonSegmenter.cs` | **TASK 51 seam:** `Segment(VideoFrame) → SegmentationMask?` (`SegmentationMask(Width, Height, float[] Values)`, 0 = background, 1 = person); null = no mask → caller passes through. Tests inject fakes |
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| `BackgroundEffects/OnnxPersonSegmenter.cs` | **TASK 51 default segmenter:** MediaPipe Selfie Segmenter (landscape, Apache-2.0) as an embedded ONNX resource, run by onnxruntime on the CPU (2 intra-op threads); frame stretched to 256×144 RGB/255 NHWC; lazy session; never throws (fail → log once, null forever) |
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