| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| #ifndef NIFI_MINIFI_CPP_FRAMEIO_H |
| #define NIFI_MINIFI_CPP_FRAMEIO_H |
| |
| namespace org { |
| namespace apache { |
| namespace nifi { |
| namespace minifi { |
| namespace opencv { |
| |
| class FrameWriteCallback : public OutputStreamCallback { |
| public: |
| explicit FrameWriteCallback(cv::Mat image_mat, std::string image_encoding_) |
| // TODO - Nghia: Check std::move(img_mat). |
| : image_mat_(std::move(image_mat)), image_encoding_(image_encoding_) { |
| } |
| ~FrameWriteCallback() override = default; |
| |
| int64_t process(const std::shared_ptr<io::BaseStream>& stream) override { |
| int64_t ret = 0; |
| imencode(image_encoding_, image_mat_, image_buf_); |
| ret = stream->write(image_buf_.data(), image_buf_.size()); |
| return ret; |
| } |
| |
| private: |
| std::vector<uchar> image_buf_; |
| cv::Mat image_mat_; |
| std::string image_encoding_; |
| }; |
| |
| class FrameReadCallback : public InputStreamCallback { |
| public: |
| explicit FrameReadCallback(cv::Mat &image_mat) |
| : image_mat_(image_mat) { |
| } |
| ~FrameReadCallback() override = default; |
| |
| int64_t process(const std::shared_ptr<io::BaseStream>& stream) override { |
| int64_t ret = 0; |
| image_buf_.resize(stream->getSize()); |
| ret = stream->read(image_buf_.data(), static_cast<int>(stream->getSize())); |
| if (ret != stream->getSize()) { |
| throw std::runtime_error("ImageReadCallback failed to fully read flow file input stream"); |
| } |
| image_mat_ = cv::imdecode(image_buf_, -1); |
| return ret; |
| } |
| |
| private: |
| std::vector<uchar> image_buf_; |
| cv::Mat &image_mat_; |
| }; |
| |
| } /* namespace opencv */ |
| } /* namespace minifi */ |
| } /* namespace nifi */ |
| } /* namespace apache */ |
| } /* namespace org */ |
| |
| #endif // NIFI_MINIFI_CPP_FRAMEIO_H |