113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
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/*
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* Copyright (C) 2017 The Android Open Source Project
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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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*/
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#pragma once
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#include <map>
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#include <stdint.h>
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#include <vector>
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#include <EGL/egl.h>
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#include <GLES3/gl3.h>
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#include "aemu/base/Compiler.h"
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#include "aemu/base/synchronization/Lock.h"
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#include "DisplaySurfaceGl.h"
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#include "ReadbackWorker.h"
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namespace gfxstream {
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class ColorBuffer;
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} // namespace gfxstream
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namespace gfxstream {
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namespace gl {
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// This class implements async readback of emugl ColorBuffers.
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// It is meant to run on both the emugl framebuffer posting thread
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// and a separate GL thread, with two main points of interaction:
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class ReadbackWorkerGl : public ReadbackWorker {
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public:
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ReadbackWorkerGl(std::unique_ptr<DisplaySurfaceGl> surface,
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std::unique_ptr<DisplaySurfaceGl> flushSurface);
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~ReadbackWorkerGl();
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// GL initialization (must be on the thread that
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// will run getPixels)
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void init() override;
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// doNextReadback(): Call this from the emugl FrameBuffer::post thread
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// or similar rendering thread.
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// This will trigger an async glReadPixels of the current framebuffer.
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// The post callback of Framebuffer will also be triggered, but
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// in async mode it should do minimal work that involves |fbImage|.
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// |repaint|: flag to prime async readback with multiple iterations
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// so that the consumer of readback doesn't lag behind.
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// |readbackBgra|: Whether to force the readback format as GL_BGRA_EXT,
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// so that we get (depending on driver quality, heh) a gpu conversion of the
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// readback image that is suitable for webrtc, which expects formats like that.
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DoNextReadbackResult doNextReadback(uint32_t displayId,
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ColorBuffer* cb,
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void* fbImage,
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bool repaint,
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bool readbackBgra) override;
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// getPixels(): Run this on a separate GL thread. This retrieves the
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// latest framebuffer that has been posted and read with doNextReadback.
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// This is meant for apps like video encoding to use as input; they will
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// need to do synchronized communication with the thread ReadbackWorker
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// is running on.
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void getPixels(uint32_t displayId, void* out, uint32_t bytes) override;
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// Duplicates the last frame and generates a post events if
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// there are no read events active.
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// This is usually called when there was no doNextReadback activity
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// for a few ms, to guarantee that end users see the final frame.
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FlushResult flushPipeline(uint32_t displayId) override;
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void initReadbackForDisplay(uint32_t displayId, uint32_t w, uint32_t h) override;
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void deinitReadbackForDisplay(uint32_t displayId) override;
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class TrackedDisplay {
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public:
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TrackedDisplay() = default;
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TrackedDisplay(uint32_t displayId, uint32_t w, uint32_t h);
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uint32_t mReadPixelsIndexEven = 0;
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uint32_t mReadPixelsIndexOdd = 1;
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uint32_t mPrevReadPixelsIndex = 1;
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uint32_t mMapCopyIndex = 0;
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bool mIsCopying = false;
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uint32_t mBufferSize = 0;
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std::vector<GLuint> mBuffers = {};
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uint32_t m_readbackCount = 0;
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uint32_t mDisplayId = 0;
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};
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private:
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android::base::Lock mLock;
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std::unique_ptr<DisplaySurfaceGl> mSurface;
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std::unique_ptr<DisplaySurfaceGl> mFlushSurface;
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std::map<uint32_t, TrackedDisplay> mTrackedDisplays;
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DISALLOW_COPY_AND_ASSIGN(ReadbackWorkerGl);
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};
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} // namespace gl
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} // namespace gfxstream
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