85 lines
3.0 KiB
C++
85 lines
3.0 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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#include "mediapipe/framework/port/status.h"
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#include "mediapipe/gpu/gl_calculator_helper.h"
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#ifdef __APPLE__
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#include "mediapipe/objc/util.h"
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#endif
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namespace mediapipe {
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// Convert ImageFrame to GpuBuffer.
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class ImageFrameToGpuBufferCalculator : public CalculatorBase {
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public:
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ImageFrameToGpuBufferCalculator() {}
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static absl::Status GetContract(CalculatorContract* cc);
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absl::Status Open(CalculatorContext* cc) override;
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absl::Status Process(CalculatorContext* cc) override;
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private:
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#if !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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GlCalculatorHelper helper_;
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#endif // !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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};
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REGISTER_CALCULATOR(ImageFrameToGpuBufferCalculator);
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// static
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absl::Status ImageFrameToGpuBufferCalculator::GetContract(
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CalculatorContract* cc) {
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cc->Inputs().Index(0).Set<ImageFrame>();
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cc->Outputs().Index(0).Set<GpuBuffer>();
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// Note: we call this method even on platforms where we don't use the helper,
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// to ensure the calculator's contract is the same. In particular, the helper
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// enables support for the legacy side packet, which several graphs still use.
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MP_RETURN_IF_ERROR(GlCalculatorHelper::UpdateContract(cc));
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return absl::OkStatus();
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}
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absl::Status ImageFrameToGpuBufferCalculator::Open(CalculatorContext* cc) {
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// Inform the framework that we always output at the same timestamp
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// as we receive a packet at.
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cc->SetOffset(TimestampDiff(0));
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#if !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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MP_RETURN_IF_ERROR(helper_.Open(cc));
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#endif // !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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return absl::OkStatus();
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}
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absl::Status ImageFrameToGpuBufferCalculator::Process(CalculatorContext* cc) {
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#if MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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CFHolder<CVPixelBufferRef> buffer;
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MP_RETURN_IF_ERROR(CreateCVPixelBufferForImageFramePacket(
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cc->Inputs().Index(0).Value(), &buffer));
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cc->Outputs().Index(0).Add(new GpuBuffer(buffer), cc->InputTimestamp());
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#else
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const auto& input = cc->Inputs().Index(0).Get<ImageFrame>();
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helper_.RunInGlContext([this, &input, &cc]() {
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auto src = helper_.CreateSourceTexture(input);
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auto output = src.GetFrame<GpuBuffer>();
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glFlush();
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cc->Outputs().Index(0).Add(output.release(), cc->InputTimestamp());
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src.Release();
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});
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#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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return absl::OkStatus();
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}
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} // namespace mediapipe
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