25 lines
801 B
TypeScript
25 lines
801 B
TypeScript
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// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { useRef, useCallback } from 'react';
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import { FRAME_BUFFER_SIZE } from './constants';
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/**
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* A hook that returns a function. This function returns a "singleton" `ArrayBuffer` to be
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* used in call video rendering.
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*
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* This is most useful for group calls, where we can reuse the same frame buffer instead
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* of allocating one per participant. Be careful when using this buffer elsewhere, as it
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* is not cleaned up and may hold stale data.
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*/
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export function useGetCallingFrameBuffer(): () => ArrayBuffer {
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const ref = useRef<ArrayBuffer | null>(null);
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return useCallback(() => {
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if (!ref.current) {
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ref.current = new ArrayBuffer(FRAME_BUFFER_SIZE);
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}
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return ref.current;
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}, []);
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}
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