Function _createInputDescriptor

lib/input.mjs:53–522

* Create Object containing input and input-related options. * @private

(input, inputOptions, containerOptions)

 * @private
 */
function _createInputDescriptor (input, inputOptions, containerOptions) {
  const inputDescriptor = {
    autoOrient: false,
    failOn: 'warning',
    limitInputPixels: 0x3FFF ** 2,
    limitInputChannels: 5,
    ignoreIcc: false,
    unlimited: false,
    sequentialRead: true
  };
  if (is.string(input)) {
    // filesystem
    inputDescriptor.file = input;
  } else if (is.buffer(input)) {
    // Buffer
    if (input.length === 0) {
      throw Error('Input Buffer is empty');
    }
    inputDescriptor.buffer = input;
  } else if (is.arrayBuffer(input)) {
    if (input.byteLength === 0) {
      throw Error('Input bit Array is empty');
    }
    inputDescriptor.buffer = Buffer.from(input, 0, input.byteLength);
  } else if (is.typedArray(input)) {
    if (input.length === 0) {
      throw Error('Input Bit Array is empty');
    }
    inputDescriptor.buffer = Buffer.from(input.buffer, input.byteOffset, input.byteLength);
  } else if (is.plainObject(input) && !is.defined(inputOptions)) {
    // Plain Object descriptor, e.g. create
    inputOptions = input;
    if (_inputOptionsFromObject(inputOptions)) {
      // Stream with options
      inputDescriptor.buffer = [];
    }
  } else if (!is.defined(input) && !is.defined(inputOptions) && is.object(containerOptions) && containerOptions.allowStream) {
    // Stream without options
    inputDescriptor.buffer = [];
  } else if (Array.isArray(input)) {
    if (input.length > 1) {
      // Join images together
      if (!this.options.joining) {
        this.options.joining = true;
        this.options.join = input.map(i => this._createInputDescriptor(i));
      } else {
        throw new Error('Recursive join is unsupported');
      }
    } else {
      throw new Error('Expected at least two images to join');
    }
  } else {
    throw new Error(`Unsupported input '${input}' of type ${typeof input}${
      is.defined(inputOptions) ? ` when also providing options of type ${typeof inputOptions}` : ''
    }`);
  }
  if (is.object(inputOptions)) {
    // failOn