43 lines
1.7 KiB
C++
43 lines
1.7 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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#ifndef MEDIAPIPE_GPU_EGL_SURFACE_HOLDER_H_
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#define MEDIAPIPE_GPU_EGL_SURFACE_HOLDER_H_
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#include "absl/synchronization/mutex.h"
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#include "mediapipe/gpu/gl_base.h"
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namespace mediapipe {
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// This is used to pass an EGLSurface to a GlSurfaceSinkCalculator.
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struct EglSurfaceHolder {
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// Access to the surface needs to be protected by a mutex to ensure that the
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// application does not destroy the surface while MediaPipe is using it.
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// NOTE: Code that needs to grab the GlContext mutex should always do so
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// before grabbing this one. For example, do not call GlContext::Run or
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// GlCalculatorHelper::RunInGlContext while holding this mutex, but instead
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// grab this inside the callable passed to them.
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absl::Mutex mutex;
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EGLSurface surface ABSL_GUARDED_BY(mutex) = EGL_NO_SURFACE;
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// True if MediaPipe created the surface and is responsible for destroying it.
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bool owned ABSL_GUARDED_BY(mutex) = false;
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// Vertical flip of the surface, useful for conversion between coordinate
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// systems with top-left v.s. bottom-left origins.
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bool flip_y = false;
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};
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} // namespace mediapipe
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#endif // MEDIAPIPE_GPU_EGL_SURFACE_HOLDER_H_
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