58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
// Copyright 2019 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <memory>
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#include <string>
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#include "mediapipe/framework/calculator_framework.h"
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#include "mediapipe/framework/port/file_helpers.h"
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#include "mediapipe/framework/port/status.h"
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namespace mediapipe {
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// The calculator takes the path to the local file as an input side packet and
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// outputs the contents of that file.
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//
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// Example config:
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// node {
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// calculator: "LocalFileContentsCalculator"
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// input_side_packet: "FILE_PATH:file_path"
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// output_side_packet: "CONTENTS:contents"
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// }
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class LocalFileContentsCalculator : public CalculatorBase {
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public:
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static ::mediapipe::Status GetContract(CalculatorContract* cc) {
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cc->InputSidePackets().Tag("FILE_PATH").Set<std::string>();
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cc->OutputSidePackets().Tag("CONTENTS").Set<std::string>();
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return ::mediapipe::OkStatus();
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}
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::mediapipe::Status Open(CalculatorContext* cc) override {
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std::string contents;
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MP_RETURN_IF_ERROR(mediapipe::file::GetContents(
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cc->InputSidePackets().Tag("FILE_PATH").Get<std::string>(), &contents));
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cc->OutputSidePackets()
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.Tag("CONTENTS")
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.Set(MakePacket<std::string>(std::move(contents)));
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return ::mediapipe::OkStatus();
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}
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::mediapipe::Status Process(CalculatorContext* cc) override {
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return ::mediapipe::OkStatus();
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}
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};
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REGISTER_CALCULATOR(LocalFileContentsCalculator);
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} // namespace mediapipe
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