react-native-audio-api/src/core/AudioContext.ts

react-native-audio-api provides system for controlling audio in React Native environment compatible with Web Audio API specification

import AudioAPIModule from '../AudioAPIModule';
import { NotSupportedError } from '../errors';
import { AudioTagHandle } from '../Audio/types';
import { IAudioContext } from '../jsi-interfaces';
import AudioManager from '../system';
import { AudioContextOptions } from '../types';
import BaseAudioContext from './BaseAudioContext';
import MediaElementAudioSourceNode from './MediaElementAudioSourceNode';

export default class AudioContext extends BaseAudioContext {
  constructor(options?: AudioContextOptions) {
    if (
      options &&
      options.sampleRate &&
      (options.sampleRate < 8000 || options.sampleRate > 96000)
    ) {
      throw new NotSupportedError(
        `The provided sampleRate is not supported: ${options.sampleRate}`
      );
    }

    const audioRuntime = AudioAPIModule.createAudioRuntime();

    super(
      globalThis.createAudioContext(
        options?.sampleRate || AudioManager.getDevicePreferredSampleRate(),
        audioRuntime
      )
    );
  }

  async close(): Promise<void> {
    return (this.context as IAudioContext).close();
  }

  async resume(): Promise<void> {
    await (this.context as IAudioContext).resume();
  }

  async suspend(): Promise<void> {
    await (this.context as IAudioContext).suspend();
  }

  createMediaElementSource(
    mediaElement: AudioTagHandle
  ): MediaElementAudioSourceNode {
    return new MediaElementAudioSourceNode(this, { mediaElement });
  }
}