text: "use strict";
  /**
   * @license
   * Copyright 2018 Google LLC. All Rights Reserved.
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * =============================================================================
   */
  var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
      return new (P || (P = Promise))(function (resolve, reject) {
          function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
          function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
          function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
          step((generator = generator.apply(thisArg, _arguments || [])).next());
      });
  };
  var __generator = (this && this.__generator) || function (thisArg, body) {
      var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
      return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
      function verb(n) { return function (v) { return step([n, v]); }; }
      function step(op) {
          if (f) throw new TypeError("Generator is already executing.");
          while (_) try {
              if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
              if (y = 0, t) op = [op[0] & 2, t.value];
              switch (op[0]) {
                  case 0: case 1: t = op; break;
                  case 4: _.label++; return { value: op[1], done: false };
                  case 5: _.label++; y = op[1]; op = [0]; continue;
                  case 7: op = _.ops.pop(); _.trys.pop(); continue;
                  default:
                      if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                      if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                      if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                      if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                      if (t[2]) _.ops.pop();
                      _.trys.pop(); continue;
              }
              op = body.call(thisArg, _);
          } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
          if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
      }
  };
  Object.defineProperty(exports, "__esModule", { value: true });
  var util = require("../util");
  var io_utils_1 = require("./io_utils");
  var progress_1 = require("./progress");
  var types_1 = require("./types");
  /**
   * Reads binary weights data from a number of URLs.
   *
   * @param fetchURLs URLs to send the HTTP requests at, using `fetch` calls.
   * @param requestOptions RequestInit (options) for the HTTP requests.
   * @param fetchFunc Optional overriding value for the `window.fetch` function.
   * @param onProgress Optional, progress callback function, fired periodically
   *   before the load is completed.
   * @returns A `Promise` of an Array of `ArrayBuffer`. The Array has the same
   *   length as `fetchURLs`.
   */
  function loadWeightsAsArrayBuffer(fetchURLs, loadOptions) {
      return __awaiter(this, void 0, void 0, function () {
          var fetchFunc, requests, fetchStartFraction, fetchEndFraction, responses, _a, bufferPromises, bufferStartFraction, bufferEndFraction, buffers, _b;
          return __generator(this, function (_c) {
              switch (_c.label) {
                  case 0:
                      if (loadOptions == null) {
                          loadOptions = {};
                      }
                      fetchFunc = loadOptions.fetchFunc == null ? fetch : loadOptions.fetchFunc;
                      requests = fetchURLs.map(function (fetchURL) { return fetchFunc(fetchURL, loadOptions.requestInit); });
                      fetchStartFraction = 0;
                      fetchEndFraction = 0.5;
                      if (!(loadOptions.onProgress == null)) return [3 /*break*/, 2];
                      return [4 /*yield*/, Promise.all(requests)];
                  case 1:
                      _a = _c.sent();
                      return [3 /*break*/, 4];
                  case 2: return [4 /*yield*/, progress_1.monitorPromisesProgress(requests, loadOptions.onProgress, fetchStartFraction, fetchEndFraction)];
                  case 3:
                      _a = _c.sent();
                      _c.label = 4;
                  case 4:
                      responses = _a;
                      bufferPromises = responses.map(function (response) { return response.arrayBuffer(); });
                      bufferStartFraction = 0.5;
                      bufferEndFraction = 1;
                      if (!(loadOptions.onProgress == null)) return [3 /*break*/, 6];
                      return [4 /*yield*/, Promise.all(bufferPromises)];
                  case 5:
                      _b = _c.sent();
                      return [3 /*break*/, 8];
                  case 6: return [4 /*yield*/, progress_1.monitorPromisesProgress(bufferPromises, loadOptions.onProgress, bufferStartFraction, bufferEndFraction)];
                  case 7:
                      _b = _c.sent();
                      _c.label = 8;
                  case 8:
                      buffers = _b;
                      return [2 /*return*/, buffers];
              }
          });
      });
  }
  exports.loadWeightsAsArrayBuffer = loadWeightsAsArrayBuffer;
  /**
   * Reads a weights manifest JSON configuration, fetches the weights and
   * returns them as `Tensor`s.
   *
   * @param manifest The weights manifest JSON.
   * @param filePathPrefix The path prefix for filenames given in the manifest.
   *     Defaults to the empty string.
   * @param weightNames The names of the weights to be fetched.
   */
  function loadWeights(manifest, filePathPrefix, weightNames, requestInit) {
      if (filePathPrefix === void 0) { filePathPrefix = ''; }
      return __awaiter(this, void 0, void 0, function () {
          var fetchWeights, loadWeights;
          return __generator(this, function (_a) {
              fetchWeights = function (fetchUrls) {
                  return loadWeightsAsArrayBuffer(fetchUrls, { requestInit: requestInit });
              };
              loadWeights = weightsLoaderFactory(fetchWeights);
              return [2 /*return*/, loadWeights(manifest, filePathPrefix, weightNames)];
          });
      });
  }
  exports.loadWeights = loadWeights;
  /**
   * Creates a function, which reads a weights manifest JSON configuration,
   * fetches the weight files using the specified function and returns them as
   * `Tensor`s.
   *
   * ```js
   * // example for creating a nodejs weight loader, which reads the weight files
   * // from disk using fs.readFileSync
   *
   * import * as fs from 'fs'
   *
   * const fetchWeightsFromDisk = (filePaths: string[]) =>
   *   filePaths.map(filePath => fs.readFileSync(filePath).buffer)
   *
   * const loadWeights = tf.io.weightsLoaderFactory(fetchWeightsFromDisk)
   *
   * const manifest = JSON.parse(
   *   fs.readFileSync('./my_model-weights_manifest').toString()
   * )
   * const weightMap = await loadWeights(manifest, './')
   * ```
   * @param fetchWeightsFunction The function used for fetching the weight files.
   * @returns Weight loading function.
   */
  function weightsLoaderFactory(fetchWeightsFunction) {
      var _this = this;
      return function (manifest, filePathPrefix, weightNames) {
          if (filePathPrefix === void 0) { filePathPrefix = ''; }
          return __awaiter(_this, void 0, void 0, function () {
              var groupIndicesToFetchMap, groupWeightsToFetch, weightsFound, allManifestWeightNames, weightsNotFound, groupIndicesToFetch, fetchUrls, buffers, weightsTensorMap, bufferIndexOffset;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0:
                          groupIndicesToFetchMap = manifest.map(function () { return false; });
                          groupWeightsToFetch = {};
                          weightsFound = weightNames != null ? weightNames.map(function () { return false; }) : [];
                          allManifestWeightNames = [];
                          manifest.forEach(function (manifestGroupConfig, groupIndex) {
                              var groupOffset = 0;
                              manifestGroupConfig.weights.forEach(function (weightsEntry) {
                                  var rawDtype = ('quantization' in weightsEntry) ?
                                      weightsEntry.quantization.dtype :
                                      weightsEntry.dtype;
                                  var weightsBytes = types_1.DTYPE_VALUE_SIZE_MAP[rawDtype] *
                                      util.sizeFromShape(weightsEntry.shape);
                                  var enqueueWeightsForFetchingFn = function () {
                                      groupIndicesToFetchMap[groupIndex] = true;
                                      if (groupWeightsToFetch[groupIndex] == null) {
                                          groupWeightsToFetch[groupIndex] = [];
                                      }
                                      groupWeightsToFetch[groupIndex].push({
                                          manifestEntry: weightsEntry,
                                          groupOffset: groupOffset,
                                          sizeBytes: weightsBytes
                                      });
                                  };
                                  if (weightNames != null) {
                                      weightNames.forEach(function (weightName, weightIndex) {
                                          if (weightName === weightsEntry.name) {
                                              enqueueWeightsForFetchingFn();
                                              weightsFound[weightIndex] = true;
                                          }
                                      });
                                  }
                                  else {
                                      enqueueWeightsForFetchingFn();
                                  }
                                  allManifestWeightNames.push(weightsEntry.name);
                                  groupOffset += weightsBytes;
                              });
                          });
                          if (!weightsFound.every(function (found) { return found; })) {
                              weightsNotFound = weightNames.filter(function (_, i) { return !weightsFound[i]; });
                              throw new Error("Could not find weights in manifest with names: " +
                                  (weightsNotFound.join(', ') + ". \n") +
                                  "Manifest JSON has weights with names: " +
                                  (allManifestWeightNames.join(', ') + "."));
                          }
                          groupIndicesToFetch = groupIndicesToFetchMap.reduce(function (accumulator, shouldFetch, i) {
                              if (shouldFetch) {
                                  accumulator.push(i);
                              }
                              return accumulator;
                          }, []);
                          fetchUrls = [];
                          groupIndicesToFetch.forEach(function (i) {
                              manifest[i].paths.forEach(function (filepath) {
                                  var fetchUrl = filePathPrefix +
                                      (!filePathPrefix.endsWith('/') ? '/' : '') + filepath;
                                  fetchUrls.push(fetchUrl);
                              });
                          });
                          return [4 /*yield*/, fetchWeightsFunction(fetchUrls)];
                      case 1:
                          buffers = _a.sent();
                          weightsTensorMap = {};
                          bufferIndexOffset = 0;
                          groupIndicesToFetch.forEach(function (i) {
                              var numBuffers = manifest[i].paths.length;
                              var groupBytes = 0;
                              for (var i_1 = 0; i_1 < numBuffers; i_1++) {
                                  groupBytes += buffers[bufferIndexOffset + i_1].byteLength;
                              }
                              // Create a buffer for the whole group.
                              var groupBuffer = new ArrayBuffer(groupBytes);
                              var groupByteBuffer = new Uint8Array(groupBuffer);
                              var groupBufferOffset = 0;
                              for (var i_2 = 0; i_2 < numBuffers; i_2++) {
                                  var buffer = new Uint8Array(buffers[bufferIndexOffset + i_2]);
                                  groupByteBuffer.set(buffer, groupBufferOffset);
                                  groupBufferOffset += buffer.byteLength;
                              }
                              var weightsEntries = groupWeightsToFetch[i];
                              weightsEntries.forEach(function (weightsEntry) {
                                  var byteBuffer = groupBuffer.slice(weightsEntry.groupOffset, weightsEntry.groupOffset + weightsEntry.sizeBytes);
                                  var nameToTensorMap = io_utils_1.decodeWeights(byteBuffer, [weightsEntry.manifestEntry]);
                                  for (var name_1 in nameToTensorMap) {
                                      weightsTensorMap[name_1] = nameToTensorMap[name_1];
                                  }
                              });
                              bufferIndexOffset += numBuffers;
                          });
                          return [2 /*return*/, weightsTensorMap];
                  }
              });
          });
      };
  }
  exports.weightsLoaderFactory = weightsLoaderFactory;
  //# sourceMappingURL=weights_loader.js.map