node-web-audio-api/js/IIRFilterNode.js

Web Audio API implementation for Node.js

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/* eslint-disable no-unused-vars */
import conversions from 'webidl-conversions';

import nativeBinding from '../load-native.js';
import {
  toSanitizedSequence,
} from './lib/cast.js';
import {
  isFunction,
  kEnumerableProperty,
} from './lib/utils.js';
import {
  throwSanitizedError,
} from './lib/errors.js';
import {
  kNapiObj,
  kAudioBuffer,
} from './lib/symbols.js';

import {
  AudioParam,
} from './AudioParam.js';
import {
  AudioBuffer,
} from './AudioBuffer.js';
import {
  PeriodicWave,
} from './PeriodicWave.js';

import {
  BaseAudioContext,
} from './BaseAudioContext.js';

/* eslint-enable no-unused-vars */

import {
  AudioNode,
} from './AudioNode.js';

export class IIRFilterNode extends AudioNode {

  constructor(context, options) {

    if (arguments.length < 2) {
      throw new TypeError(`Failed to construct 'IIRFilterNode': 2 argument required, but only ${arguments.length} present`);
    }

    if (!(context instanceof BaseAudioContext)) {
      throw new TypeError(`Failed to construct 'IIRFilterNode': argument 1 is not of type BaseAudioContext`);
    }

    const parsedOptions = {};

    if (options && typeof options !== 'object') {
      throw new TypeError('Failed to construct \'IIRFilterNode\': argument 2 is not of type \'IIRFilterOptions\'');
    }

    // required options
    if (typeof options !== 'object' || (options && options.feedforward === undefined)) {
      throw new TypeError('Failed to construct \'IIRFilterNode\': Failed to read the \'feedforward\' property from IIRFilterOptions: Required member is undefined');
    }

    if (options && options.feedforward !== undefined) {
      try {
        parsedOptions.feedforward = toSanitizedSequence(options.feedforward, Float64Array);
      } catch (err) {
        throw new TypeError(`Failed to construct 'IIRFilterNode': Failed to read the 'feedforward' property from IIRFilterOptions: The provided value ${err.message}`);
      }
    } else {
      parsedOptions.feedforward = null;
    }

    // required options
    if (typeof options !== 'object' || (options && options.feedback === undefined)) {
      throw new TypeError('Failed to construct \'IIRFilterNode\': Failed to read the \'feedback\' property from IIRFilterOptions: Required member is undefined');
    }

    if (options && options.feedback !== undefined) {
      try {
        parsedOptions.feedback = toSanitizedSequence(options.feedback, Float64Array);
      } catch (err) {
        throw new TypeError(`Failed to construct 'IIRFilterNode': Failed to read the 'feedback' property from IIRFilterOptions: The provided value ${err.message}`);
      }
    } else {
      parsedOptions.feedback = null;
    }

    if (options && options.channelCount !== undefined) {
      parsedOptions.channelCount = conversions['unsigned long'](options.channelCount, {
        enforceRange: true,
        context: `Failed to construct 'IIRFilterNode': Failed to read the 'channelCount' property from IIRFilterOptions: The provided value '${options.channelCount}'`,
      });
    }

    if (options && options.channelCountMode !== undefined) {
      parsedOptions.channelCountMode = conversions['DOMString'](options.channelCountMode, {
        context: `Failed to construct 'IIRFilterNode': Failed to read the 'channelCount' property from IIRFilterOptions: The provided value '${options.channelCountMode}'`,
      });
    }

    if (options && options.channelInterpretation !== undefined) {
      parsedOptions.channelInterpretation = conversions['DOMString'](options.channelInterpretation, {
        context: `Failed to construct 'IIRFilterNode': Failed to read the 'channelInterpretation' property from IIRFilterOptions: The provided value '${options.channelInterpretation}'`,
      });
    }

    let napiObj;

    try {
      napiObj = new nativeBinding.NapiIIRFilterNode(context[kNapiObj], parsedOptions);
    } catch (err) {
      throwSanitizedError(err);
    }

    super(context, {
      [kNapiObj]: napiObj,
    });

  }

  getFrequencyResponse(frequencyHz, magResponse, phaseResponse) {
    if (!(this instanceof IIRFilterNode)) {
      throw new TypeError('Invalid Invocation: Value of \'this\' must be of type \'IIRFilterNode\'');
    }

    if (arguments.length < 3) {
      throw new TypeError(`Failed to execute 'getFrequencyResponse' on 'IIRFilterNode': 3 argument required, but only ${arguments.length} present`);
    }

    if (!(frequencyHz instanceof Float32Array)) {
      throw new TypeError(`Failed to execute 'getFrequencyResponse' on 'IIRFilterNode': Parameter 1 is not of type 'Float32Array'`);
    }

    if (!(magResponse instanceof Float32Array)) {
      throw new TypeError(`Failed to execute 'getFrequencyResponse' on 'IIRFilterNode': Parameter 2 is not of type 'Float32Array'`);
    }

    if (!(phaseResponse instanceof Float32Array)) {
      throw new TypeError(`Failed to execute 'getFrequencyResponse' on 'IIRFilterNode': Parameter 3 is not of type 'Float32Array'`);
    }

    try {
      return this[kNapiObj].getFrequencyResponse(frequencyHz, magResponse, phaseResponse);
    } catch (err) {
      throwSanitizedError(err);
    }
  }

}

Object.defineProperties(IIRFilterNode, {
  length: {
    __proto__: null,
    writable: false,
    enumerable: false,
    configurable: true,
    value: 2,
  },
});

Object.defineProperties(IIRFilterNode.prototype, {
  [Symbol.toStringTag]: {
    __proto__: null,
    writable: false,
    enumerable: false,
    configurable: true,
    value: 'IIRFilterNode',
  },

  getFrequencyResponse: kEnumerableProperty,
});