File size: 2,859 Bytes
8207382 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | // Copyright (c) 2025 PaddlePaddle Authors. 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.
#pragma once
#include <opencv2/opencv.hpp>
#include <string>
#include <type_traits>
#include <vector>
#include "absl/status/status.h"
#include "absl/status/statusor.h"
class BaseBatchSampler {
public:
explicit BaseBatchSampler(int batch_size) : batch_size_(batch_size) {}
virtual ~BaseBatchSampler() = default;
int BatchSize() const;
absl::Status SetBatchSize(int batch_size);
template <typename T>
absl::StatusOr<std::vector<std::vector<cv::Mat>>> Apply(const T &input);
template <typename T>
absl::StatusOr<std::vector<std::vector<cv::Mat>>> Sample(const T &input) {
return absl::InvalidArgumentError(
"Sample failed! Unsupported type for Sample");
}
virtual absl::StatusOr<std::vector<std::vector<cv::Mat>>>
SampleFromString(const std::string &input) = 0;
virtual absl::StatusOr<std::vector<std::vector<cv::Mat>>>
SampleFromVector(const std::vector<std::string> &inputs) = 0;
std::vector<std::string> InputPath() { return input_path_; };
virtual absl::StatusOr<std::vector<std::vector<cv::Mat>>>
SampleFromMatVector(const std::vector<cv::Mat> &inputs) = 0;
absl::StatusOr<std::vector<std::vector<std::string>>>
SampleFromStringToStringVector(const std::string &input);
absl::StatusOr<std::vector<std::vector<std::string>>>
SampleFromVectorToStringVector(const std::vector<std::string> &input);
absl::StatusOr<std::vector<std::string>>
GetFilesList(const std::string &path);
protected:
int batch_size_ = 1;
std::vector<std::string> input_path_;
};
template <typename T>
absl::StatusOr<std::vector<std::vector<cv::Mat>>>
BaseBatchSampler::Apply(const T &input) {
return Sample(input);
}
template <>
inline absl::StatusOr<std::vector<std::vector<cv::Mat>>>
BaseBatchSampler::Sample<std::string>(const std::string &input) {
return SampleFromString(input);
}
template <>
inline absl::StatusOr<std::vector<std::vector<cv::Mat>>>
BaseBatchSampler::Sample<std::vector<std::string>>(
const std::vector<std::string> &input) {
return SampleFromVector(input);
}
template <>
inline absl::StatusOr<std::vector<std::vector<cv::Mat>>>
BaseBatchSampler::Sample<std::vector<cv::Mat>>(
const std::vector<cv::Mat> &input) {
return SampleFromMatVector(input);
}
|