import { TNativeAudioBuffer } from '../types';

export const copyToChannel = (
    audioBuffer: TNativeAudioBuffer,
    parent: { [key: number]: Float32Array },
    key: number,
    channelNumber: number,
    bufferOffset: number
): void => {
    if (typeof audioBuffer.copyToChannel === 'function') {
        // The byteLength will be 0 when the ArrayBuffer was transferred.
        if (parent[key].byteLength !== 0) {
            audioBuffer.copyToChannel(parent[key], channelNumber, bufferOffset);
        }

        // Bug #5: Safari does not support copyToChannel().
    } else {
        // The byteLength will be 0 when the ArrayBuffer was transferred.
        if (parent[key].byteLength !== 0) {
            audioBuffer.getChannelData(channelNumber).set(parent[key], bufferOffset);
        }
    }
};