101 lines
3.1 KiB
C++
101 lines
3.1 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 "mediapipe/framework/calculator_framework.h"
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#include "mediapipe/framework/formats/image_frame.h"
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#if !defined(MEDIAPIPE_DISABLE_GPU)
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#include "mediapipe/gpu/gpu_buffer.h"
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#endif // !MEDIAPIPE_DISABLE_GPU
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namespace {
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constexpr char kImageFrameTag[] = "IMAGE";
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constexpr char kGpuBufferTag[] = "IMAGE_GPU";
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} // namespace
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namespace mediapipe {
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// Extracts image properties from the input image and outputs the properties.
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// Currently only supports image size.
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// Input:
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// One of the following:
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// IMAGE: An ImageFrame
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// IMAGE_GPU: A GpuBuffer
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//
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// Output:
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// SIZE: Size (as a std::pair<int, int>) of the input image.
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//
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// Example usage:
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// node {
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// calculator: "ImagePropertiesCalculator"
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// input_stream: "IMAGE:image"
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// output_stream: "SIZE:size"
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// }
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class ImagePropertiesCalculator : public CalculatorBase {
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public:
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static ::mediapipe::Status GetContract(CalculatorContract* cc) {
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RET_CHECK(cc->Inputs().HasTag(kImageFrameTag) ^
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cc->Inputs().HasTag(kGpuBufferTag));
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if (cc->Inputs().HasTag(kImageFrameTag)) {
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cc->Inputs().Tag(kImageFrameTag).Set<ImageFrame>();
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}
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#if !defined(MEDIAPIPE_DISABLE_GPU)
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if (cc->Inputs().HasTag(kGpuBufferTag)) {
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cc->Inputs().Tag(kGpuBufferTag).Set<::mediapipe::GpuBuffer>();
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}
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#endif // !MEDIAPIPE_DISABLE_GPU
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if (cc->Outputs().HasTag("SIZE")) {
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cc->Outputs().Tag("SIZE").Set<std::pair<int, int>>();
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}
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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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cc->SetOffset(TimestampDiff(0));
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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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int width;
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int height;
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if (cc->Inputs().HasTag(kImageFrameTag) &&
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!cc->Inputs().Tag(kImageFrameTag).IsEmpty()) {
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const auto& image = cc->Inputs().Tag(kImageFrameTag).Get<ImageFrame>();
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width = image.Width();
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height = image.Height();
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}
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#if !defined(MEDIAPIPE_DISABLE_GPU)
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if (cc->Inputs().HasTag(kGpuBufferTag) &&
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!cc->Inputs().Tag(kGpuBufferTag).IsEmpty()) {
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const auto& image =
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cc->Inputs().Tag(kGpuBufferTag).Get<mediapipe::GpuBuffer>();
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width = image.width();
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height = image.height();
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}
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#endif // !MEDIAPIPE_DISABLE_GPU
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cc->Outputs().Tag("SIZE").AddPacket(
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MakePacket<std::pair<int, int>>(width, height)
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.At(cc->InputTimestamp()));
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return ::mediapipe::OkStatus();
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}
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};
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REGISTER_CALCULATOR(ImagePropertiesCalculator);
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} // namespace mediapipe
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