glass beadian
aa5e262f3a
Self-hosted multi-platform broadcast newsroom for activist collectives: publishing pipeline with group approval and DST-proof scheduling, TweetDeck-style column wall with hostile-content-safe rendering, live control room with Auto Director, bridged chat governance with polls and quorum, distributed sandboxed transcode workers, encrypted content-addressed archive, monthly analytics. MIT licensed. See README.md and docs/.
29 lines
1.1 KiB
TypeScript
29 lines
1.1 KiB
TypeScript
/**
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* Preallocated, refcounted frame buffers. Raw 1080p frames are 3 MB; allocating
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* one per frame is ~93 MB/s of external memory per stream and drives GC, so the
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* gate and the source bus recycle buffers once every in-flight write is done.
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*/
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export class BufferPool {
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private readonly free: Buffer[] = [];
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private readonly refs = new Map<Buffer, number>();
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/** Buffers allocated after construction; stays 0 in steady state. */
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allocs = 0;
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constructor(readonly size: number, prealloc: number) {
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for (let i = 0; i < prealloc; i += 1) this.free.push(Buffer.alloc(size));
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}
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/** The caller owns one reference; `release()` it when done. */
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get(): Buffer {
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let buf = this.free.pop();
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if (!buf) { this.allocs += 1; buf = Buffer.alloc(this.size); }
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this.refs.set(buf, 1);
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return buf;
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}
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retain(buf: Buffer): void { this.refs.set(buf, (this.refs.get(buf) ?? 0) + 1); }
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release(buf: Buffer): void {
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const n = (this.refs.get(buf) ?? 0) - 1;
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if (n > 0) { this.refs.set(buf, n); return; }
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if (n < 0) return; // not pool-owned or already free
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this.refs.delete(buf);
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this.free.push(buf);
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}
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}
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