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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_HOST_DESKTOP_CAPTURER_PROXY_H_
#define REMOTING_HOST_DESKTOP_CAPTURER_PROXY_H_
#include <cstdint>
#include <memory>
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "remoting/protocol/desktop_capturer.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
#include "third_party/webrtc/modules/desktop_capture/shared_memory.h"
#if defined(WEBRTC_USE_GIO)
#include "base/functional/callback.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_capture_metadata.h"
#endif
namespace base {
class SingleThreadTaskRunner;
} // namespace base
namespace remoting {
// DesktopCapturerProxy is responsible for calling webrtc::DesktopCapturer on
// the capturer thread and then returning results to the caller's thread.
// GetSourceList() is not implemented by this class, it always returns false.
class DesktopCapturerProxy : public DesktopCapturer {
public:
explicit DesktopCapturerProxy(
scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner);
DesktopCapturerProxy(const DesktopCapturerProxy&) = delete;
DesktopCapturerProxy& operator=(const DesktopCapturerProxy&) = delete;
~DesktopCapturerProxy() override;
// CreateCapturer() should be used if the capturer needs to be created on the
// capturer thread. Otherwise, the capturer can be passed to set_capturer().
void CreateCapturer(
base::OnceCallback<std::unique_ptr<webrtc::DesktopCapturer>()> creator);
void set_capturer(std::unique_ptr<webrtc::DesktopCapturer> capturer);
// webrtc::DesktopCapturer interface.
void Start(Callback* callback) override;
void SetSharedMemoryFactory(std::unique_ptr<webrtc::SharedMemoryFactory>
shared_memory_factory) override;
void CaptureFrame() override;
bool GetSourceList(SourceList* sources) override;
bool SelectSource(SourceId id) override;
void SetMaxFrameRate(std::uint32_t max_frame_rate) override;
#if defined(WEBRTC_USE_GIO)
void GetMetadataAsync(base::OnceCallback<void(webrtc::DesktopCaptureMetadata)>
callback) override;
#endif
private:
class Core;
void OnFrameCaptureStarting();
void OnFrameCaptured(webrtc::DesktopCapturer::Result result,
std::unique_ptr<webrtc::DesktopFrame> frame);
#if defined(WEBRTC_USE_GIO)
void OnMetadata(webrtc::DesktopCaptureMetadata metadata);
#endif
std::unique_ptr<Core> core_;
scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_;
raw_ptr<webrtc::DesktopCapturer::Callback> callback_ = nullptr;
#if defined(WEBRTC_USE_GIO)
base::OnceCallback<void(webrtc::DesktopCaptureMetadata)> metadata_callback_;
#endif
THREAD_CHECKER(thread_checker_);
base::WeakPtrFactory<DesktopCapturerProxy> weak_factory_{this};
};
} // namespace remoting
#endif // REMOTING_HOST_DESKTOP_CAPTURER_PROXY_H_
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