codebase overhaul (#697)

1 files changed, 84 insertions, 0 deletions

diff --git a/apps/web/src/services/renderer/nodes/video-node.ts b/apps/web/src/services/renderer/nodes/video-node.ts
new file mode 100644
index 00000000..01394b3d
--- /dev/null
+++ b/apps/web/src/services/renderer/nodes/video-node.ts
@@ -0,0 +1,84 @@
+import type { CanvasRenderer } from "../canvas-renderer";
+import { BaseNode } from "./base-node";
+import { videoCache } from "@/services/media/video-cache";
+
+const VIDEO_EPSILON = 1 / 1000;
+
+export interface BaseMediaNodeParams {
+	file: File;
+	duration: number;
+	timeOffset: number;
+	trimStart: number;
+	trimEnd: number;
+	x?: number;
+	y?: number;
+	width?: number;
+	height?: number;
+	opacity?: number;
+}
+
+export interface VideoNodeParams extends BaseMediaNodeParams {
+	mediaId: string;
+}
+
+export class VideoNode extends BaseNode<VideoNodeParams> {
+	private getVideoTime(time: number) {
+		return time - this.params.timeOffset + this.params.trimStart;
+	}
+
+	private isInRange(time: number) {
+		const videoTime = this.getVideoTime(time);
+		return (
+			videoTime >= this.params.trimStart - VIDEO_EPSILON &&
+			videoTime < this.params.trimStart + this.params.duration
+		);
+	}
+
+	async render({ renderer, time }: { renderer: CanvasRenderer; time: number }) {
+		await super.render({ renderer, time });
+
+		if (!this.isInRange(time)) {
+			return;
+		}
+
+		const videoTime = this.getVideoTime(time);
+		const frame = await videoCache.getFrameAt({
+			mediaId: this.params.mediaId,
+			file: this.params.file,
+			time: videoTime,
+		});
+
+		if (frame) {
+			renderer.context.save();
+
+			if (this.params.opacity !== undefined) {
+				renderer.context.globalAlpha = this.params.opacity;
+			}
+
+			if (
+				this.params.x !== undefined &&
+				this.params.y !== undefined &&
+				this.params.width !== undefined &&
+				this.params.height !== undefined
+			) {
+				renderer.context.drawImage(
+					frame.canvas,
+					this.params.x,
+					this.params.y,
+					this.params.width,
+					this.params.height,
+				);
+			} else {
+				renderer.context.drawImage(
+					frame.canvas,
+					0,
+					0,
+					renderer.width,
+					renderer.height,
+				);
+			}
+
+			renderer.context.restore();
+		}
+	}
+}