Function ValidateVideoFrameInit

src/video_frame.ts:1093–1127

(
	init: VideoFrameInit,
	format: VideoPixelFormat | null,
	codedWidth: number,
	codedHeight: number,
)

};

const ValidateVideoFrameInit = (
	init: VideoFrameInit,
	format: VideoPixelFormat | null,
	codedWidth: number,
	codedHeight: number,
): boolean => {
	// 1. If visibleRect exists:
	if (init.visibleRect) {
		// Let validAlignment be the result of running the Verify Rect Offset Alignment...
		if (!VerifyRectOffsetAlignment(format, init.visibleRect)) return false;
		// If any attribute of visibleRect is negative or not finite, return false.
		const r = init.visibleRect;
		if ((r.x || 0) < 0 || (r.y || 0) < 0 || (r.width || 0) < 0 || (r.height || 0) < 0) return false;
		// If visibleRect.width == 0 or visibleRect.height == 0 return false.
		if (r.width === 0 || r.height === 0) return false;
		// If visibleRect.y + visibleRect.height > codedHeight, return false.
		if ((r.y || 0) + (r.height || 0) > codedHeight) return false;
		// If visibleRect.x + visibleRect.width > codedWidth, return false.
		if ((r.x || 0) + (r.width || 0) > codedWidth) return false;
	}

	// 2. If codedWidth = 0 or codedHeight = 0, return false.
	if (codedWidth === 0 || codedHeight === 0) return false;

	// 3. If only one of displayWidth or displayHeight exists, return false.
	if ((init.displayWidth !== undefined && init.displayHeight === undefined)
		|| (init.displayWidth === undefined && init.displayHeight !== undefined)) {
		return false;
	}

	// 4. If displayWidth == 0 or displayHeight == 0, return false.
	if (init.displayWidth === 0 || init.displayHeight === 0) return false;

	return true;
};

const isValidVideoFrameBufferInit = (init: VideoFrameBufferInit): boolean => {
	// Check for required fields (WebIDL 'required')