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import { appendUint8Array } from './mp4-tools';
import { sliceUint8 } from './typed-array';
export default class Chunker {
private chunkSize: number;
public cache: Uint8Array | null = null;
constructor(chunkSize = Math.pow(2, 19)) {
this.chunkSize = chunkSize;
}
public push(data: Uint8Array): Array<Uint8Array> {
const { cache, chunkSize } = this;
const result: Array<Uint8Array> = [];
let temp: Uint8Array | null = null;
if (cache?.length) {
temp = appendUint8Array(cache, data);
this.cache = null;
} else {
temp = data;
}
if (temp.length < chunkSize) {
this.cache = temp;
return result;
}
if (temp.length > chunkSize) {
let offset = 0;
const len = temp.length;
while (offset < len - chunkSize) {
result.push(sliceUint8(temp, offset, offset + chunkSize));
offset += chunkSize;
}
this.cache = sliceUint8(temp, offset);
} else {
result.push(temp);
}
return result;
}
}