1 /** 2 * Copyright 2019-2021 Huawei Technologies Co., Ltd 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef MINDSPORE_CCSRC_MINDDATA_MINDRECORD_INCLUDE_SHARD_SHUFFLE_H_ 18 #define MINDSPORE_CCSRC_MINDDATA_MINDRECORD_INCLUDE_SHARD_SHUFFLE_H_ 19 20 #include <random> 21 #include "minddata/mindrecord/include/shard_operator.h" 22 23 namespace mindspore { 24 namespace mindrecord { 25 class MINDRECORD_API ShardShuffle : public ShardOperator { 26 public: 27 explicit ShardShuffle(uint32_t seed = 0, ShuffleType shuffle_type = kShuffleCategory); 28 29 ShardShuffle(uint32_t seed, int64_t no_of_samples, bool replacement, bool reshuffle_each_epoch, 30 ShuffleType shuffle_type = kShuffleSample); 31 ~ShardShuffle()32 ~ShardShuffle() override{}; 33 34 Status Execute(ShardTaskList &tasks) override; 35 36 int64_t GetNumSamples(int64_t dataset_size, int64_t num_classes) override; 37 38 private: 39 // Private helper function 40 Status CategoryShuffle(ShardTaskList &tasks); // NOLINT 41 42 // Keep the file sequence the same but shuffle the data within each file 43 Status ShuffleInfile(ShardTaskList &tasks); // NOLINT 44 45 // Shuffle the file sequence but keep the order of data within each file 46 Status ShuffleFiles(ShardTaskList &tasks); // NOLINT 47 48 uint32_t shuffle_seed_; 49 int64_t no_of_samples_; 50 bool replacement_; 51 bool reshuffle_each_epoch_; 52 ShuffleType shuffle_type_; 53 }; 54 } // namespace mindrecord 55 } // namespace mindspore 56 57 #endif // MINDSPORE_CCSRC_MINDDATA_MINDRECORD_INCLUDE_SHARD_SHUFFLE_H_ 58