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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/desktop_capturer_proxy.h"
#include <stddef.h>
#include <utility>
#include "base/bind.h"
#include "base/location.h"
#include "base/macros.h"
#include "base/single_thread_task_runner.h"
#include "base/thread_task_runner_handle.h"
#include "remoting/proto/control.pb.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
namespace remoting {
class DesktopCapturerProxy::Core : public webrtc::DesktopCapturer::Callback {
public:
Core(base::WeakPtr<DesktopCapturerProxy> proxy,
scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner,
scoped_ptr<webrtc::DesktopCapturer> capturer);
~Core() override;
void Start();
void SetSharedMemoryFactory(
scoped_ptr<webrtc::SharedMemoryFactory> shared_memory_factory);
void Capture(const webrtc::DesktopRegion& rect);
private:
// webrtc::DesktopCapturer::Callback implementation.
void OnCaptureCompleted(webrtc::DesktopFrame* frame) override;
base::ThreadChecker thread_checker_;
base::WeakPtr<DesktopCapturerProxy> proxy_;
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
scoped_ptr<webrtc::DesktopCapturer> capturer_;
DISALLOW_COPY_AND_ASSIGN(Core);
};
DesktopCapturerProxy::Core::Core(
base::WeakPtr<DesktopCapturerProxy> proxy,
scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner,
scoped_ptr<webrtc::DesktopCapturer> capturer)
: proxy_(proxy),
caller_task_runner_(base::ThreadTaskRunnerHandle::Get()),
capturer_(std::move(capturer)) {
thread_checker_.DetachFromThread();
}
DesktopCapturerProxy::Core::~Core() {
DCHECK(thread_checker_.CalledOnValidThread());
}
void DesktopCapturerProxy::Core::Start() {
DCHECK(thread_checker_.CalledOnValidThread());
capturer_->Start(this);
}
void DesktopCapturerProxy::Core::SetSharedMemoryFactory(
scoped_ptr<webrtc::SharedMemoryFactory> shared_memory_factory) {
DCHECK(thread_checker_.CalledOnValidThread());
capturer_->SetSharedMemoryFactory(
rtc_make_scoped_ptr(shared_memory_factory.release()));
}
void DesktopCapturerProxy::Core::Capture(const webrtc::DesktopRegion& rect) {
DCHECK(thread_checker_.CalledOnValidThread());
capturer_->Capture(rect);
}
void DesktopCapturerProxy::Core::OnCaptureCompleted(
webrtc::DesktopFrame* frame) {
DCHECK(thread_checker_.CalledOnValidThread());
caller_task_runner_->PostTask(
FROM_HERE, base::Bind(&DesktopCapturerProxy::OnFrameCaptured, proxy_,
base::Passed(make_scoped_ptr(frame))));
}
DesktopCapturerProxy::DesktopCapturerProxy(
scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner,
scoped_ptr<webrtc::DesktopCapturer> capturer)
: capture_task_runner_(capture_task_runner), weak_factory_(this) {
core_.reset(new Core(weak_factory_.GetWeakPtr(), capture_task_runner,
std::move(capturer)));
}
DesktopCapturerProxy::~DesktopCapturerProxy() {
capture_task_runner_->DeleteSoon(FROM_HERE, core_.release());
}
void DesktopCapturerProxy::Start(Callback* callback) {
DCHECK(thread_checker_.CalledOnValidThread());
callback_ = callback;
capture_task_runner_->PostTask(
FROM_HERE, base::Bind(&Core::Start, base::Unretained(core_.get())));
}
void DesktopCapturerProxy::SetSharedMemoryFactory(
rtc::scoped_ptr<webrtc::SharedMemoryFactory> shared_memory_factory) {
DCHECK(thread_checker_.CalledOnValidThread());
capture_task_runner_->PostTask(
FROM_HERE,
base::Bind(
&Core::SetSharedMemoryFactory, base::Unretained(core_.get()),
base::Passed(make_scoped_ptr(shared_memory_factory.release()))));
}
void DesktopCapturerProxy::Capture(const webrtc::DesktopRegion& rect) {
DCHECK(thread_checker_.CalledOnValidThread());
// Start() must be called before Capture().
DCHECK(callback_);
capture_task_runner_->PostTask(
FROM_HERE,
base::Bind(&Core::Capture, base::Unretained(core_.get()), rect));
}
void DesktopCapturerProxy::OnFrameCaptured(
scoped_ptr<webrtc::DesktopFrame> frame) {
DCHECK(thread_checker_.CalledOnValidThread());
callback_->OnCaptureCompleted(frame.release());
}
} // namespace remoting
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