android/android-emu/android/camera/camera-videoplayback-render-multiplexer.h

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "OpenGLESDispatch/GLESv2Dispatch.h"
#include "android/base/memory/LazyInstance.h"
#include "android/utils/compiler.h"
#include "android/videoinjection/VideoInjectionController.h"
#include "android/camera/camera-videoplayback-default-renderer.h"

namespace android {
namespace videoplayback {

// Render Multiplexer chooses which renderer to use for the Virtual Scene camera
// based on incoming requests from the Video Injection Controller. If no
// requests are made, the Render Multiplexer uses the most recent renderer
// requested. The Render Multiplexer starts with the Default Frame Renderer as
// its initial renderer.
class RenderMultiplexer : public virtualscene::CameraRenderer {
 public:
  RenderMultiplexer() = default;
  ~RenderMultiplexer() = default;
  bool initialize(const GLESv2Dispatch* gles2,
                  int width,
                  int height) override;
  void uninitialize() override;
  int64_t render() override;
 private:
  std::unique_ptr<DefaultFrameRenderer> mDefaultRenderer;
  virtualscene::CameraRenderer* mCurrentRenderer = nullptr;
  bool mInitialized = false;
};

}  // namespace videoplayback
}  // namespace android