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Update ImageFrameToGpuBufferCalculator to use api2 and GpuBuffer conversions

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PiperOrigin-RevId: 490374387
This commit is contained in:
Camillo Lugaresi 2022-11-22 17:25:55 -08:00 committed by Copybara-Service
parent fac97554df
commit 8ba9d87e66
2 changed files with 28 additions and 36 deletions
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2
mediapipe/gpu/BUILD
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@ -901,6 +901,8 @@ cc_library(
visibility = ["//visibility:public"],
deps = [
":gl_calculator_helper",
":gpu_buffer_storage_image_frame",
"//mediapipe/framework/api2:node",
"//mediapipe/framework:calculator_framework",
"//mediapipe/framework/formats:image_frame",
"//mediapipe/framework/port:status",

62
mediapipe/gpu/image_frame_to_gpu_buffer_calculator.cc
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@ -12,73 +12,63 @@
// See the License for the specific language governing permissions and
// limitations under the License.
#include "mediapipe/framework/api2/node.h"
#include "mediapipe/framework/calculator_framework.h"
#include "mediapipe/framework/formats/image_frame.h"
#include "mediapipe/framework/port/status.h"
#include "mediapipe/gpu/gl_calculator_helper.h"
#ifdef __APPLE__
#include "mediapipe/objc/util.h"
#endif
namespace mediapipe {
namespace api2 {
// Convert ImageFrame to GpuBuffer.
class ImageFrameToGpuBufferCalculator : public CalculatorBase {
class ImageFrameToGpuBufferCalculator
: public RegisteredNode<ImageFrameToGpuBufferCalculator> {
public:
ImageFrameToGpuBufferCalculator() {}
static constexpr Input<ImageFrame> kIn{""};
static constexpr Output<GpuBuffer> kOut{""};
static absl::Status GetContract(CalculatorContract* cc);
MEDIAPIPE_NODE_INTERFACE(ImageFrameToGpuBufferCalculator, kIn, kOut);
static absl::Status UpdateContract(CalculatorContract* cc);
absl::Status Open(CalculatorContext* cc) override;
absl::Status Process(CalculatorContext* cc) override;
private:
#if !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
GlCalculatorHelper helper_;
#endif // !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
};
REGISTER_CALCULATOR(ImageFrameToGpuBufferCalculator);
// static
absl::Status ImageFrameToGpuBufferCalculator::GetContract(
absl::Status ImageFrameToGpuBufferCalculator::UpdateContract(
CalculatorContract* cc) {
cc->Inputs().Index(0).Set<ImageFrame>();
cc->Outputs().Index(0).Set<GpuBuffer>();
// Note: we call this method even on platforms where we don't use the helper,
// to ensure the calculator's contract is the same. In particular, the helper
// enables support for the legacy side packet, which several graphs still use.
MP_RETURN_IF_ERROR(GlCalculatorHelper::UpdateContract(cc));
return absl::OkStatus();
return GlCalculatorHelper::UpdateContract(cc);
}
absl::Status ImageFrameToGpuBufferCalculator::Open(CalculatorContext* cc) {
// Inform the framework that we always output at the same timestamp
// as we receive a packet at.
cc->SetOffset(TimestampDiff(0));
#if !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
MP_RETURN_IF_ERROR(helper_.Open(cc));
#endif // !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
return absl::OkStatus();
}
absl::Status ImageFrameToGpuBufferCalculator::Process(CalculatorContext* cc) {
#if MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
CFHolder<CVPixelBufferRef> buffer;
MP_RETURN_IF_ERROR(CreateCVPixelBufferForImageFramePacket(
cc->Inputs().Index(0).Value(), &buffer));
cc->Outputs().Index(0).Add(new GpuBuffer(buffer), cc->InputTimestamp());
#else
const auto& input = cc->Inputs().Index(0).Get<ImageFrame>();
helper_.RunInGlContext([this, &input, &cc]() {
auto src = helper_.CreateSourceTexture(input);
auto output = src.GetFrame<GpuBuffer>();
glFlush();
cc->Outputs().Index(0).Add(output.release(), cc->InputTimestamp());
src.Release();
});
#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
auto image_frame = std::const_pointer_cast<ImageFrame>(
mediapipe::SharedPtrWithPacket<ImageFrame>(kIn(cc).packet()));
auto gpu_buffer = api2::MakePacket<GpuBuffer>(
std::make_shared<mediapipe::GpuBufferStorageImageFrame>(
std::move(image_frame)))
.At(cc->InputTimestamp());
// This calculator's behavior has been to do the texture upload eagerly, and
// some graphs may rely on running this on a separate GL context to avoid
// blocking another context with the read operation. So let's request GPU
// access here to ensure that the behavior stays the same.
// TODO: have a better way to do this, or defer until later.
helper_.RunInGlContext(
[&gpu_buffer] { auto view = gpu_buffer->GetReadView<GlTextureView>(0); });
kOut(cc).Send(std::move(gpu_buffer));
return absl::OkStatus();
}
} // namespace api2
} // namespace mediapipe