| // Copyright (c) 2016 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 "gpu/ipc/service/gpu_vsync_provider_win.h" |
| |
| #include <string> |
| |
| #include "base/atomicops.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/threading/thread.h" |
| #include "base/trace_event/trace_event.h" |
| #include "gpu/ipc/common/gpu_messages.h" |
| #include "ipc/ipc_message_macros.h" |
| #include "ipc/message_filter.h" |
| #include "ui/gl/vsync_provider_win.h" |
| |
| #include <windows.h> |
| |
| namespace gpu { |
| |
| namespace { |
| // from <D3dkmthk.h> |
| typedef LONG NTSTATUS; |
| typedef UINT D3DKMT_HANDLE; |
| typedef UINT D3DDDI_VIDEO_PRESENT_SOURCE_ID; |
| |
| #define STATUS_SUCCESS ((NTSTATUS)0x00000000L) |
| |
| typedef struct _D3DKMT_OPENADAPTERFROMHDC { |
| HDC hDc; |
| D3DKMT_HANDLE hAdapter; |
| LUID AdapterLuid; |
| D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId; |
| } D3DKMT_OPENADAPTERFROMHDC; |
| |
| typedef struct _D3DKMT_CLOSEADAPTER { |
| D3DKMT_HANDLE hAdapter; |
| } D3DKMT_CLOSEADAPTER; |
| |
| typedef struct _D3DKMT_WAITFORVERTICALBLANKEVENT { |
| D3DKMT_HANDLE hAdapter; |
| D3DKMT_HANDLE hDevice; |
| D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId; |
| } D3DKMT_WAITFORVERTICALBLANKEVENT; |
| |
| typedef NTSTATUS(APIENTRY* PFND3DKMTOPENADAPTERFROMHDC)( |
| D3DKMT_OPENADAPTERFROMHDC*); |
| typedef NTSTATUS(APIENTRY* PFND3DKMTCLOSEADAPTER)(D3DKMT_CLOSEADAPTER*); |
| typedef NTSTATUS(APIENTRY* PFND3DKMTWAITFORVERTICALBLANKEVENT)( |
| D3DKMT_WAITFORVERTICALBLANKEVENT*); |
| } // namespace |
| |
| // The actual implementation of background tasks plus any state that might be |
| // needed on the worker thread. |
| class GpuVSyncWorker : public base::Thread, |
| public base::RefCountedThreadSafe<GpuVSyncWorker> { |
| public: |
| GpuVSyncWorker(const gfx::VSyncProvider::UpdateVSyncCallback& callback, |
| SurfaceHandle surface_handle); |
| |
| void CleanupAndStop(); |
| void Enable(bool enabled); |
| void StartRunningVSyncOnThread(); |
| void WaitForVSyncOnThread(); |
| void SendVSyncUpdate(base::TimeTicks now, |
| base::TimeTicks timestamp, |
| base::TimeDelta interval); |
| bool BelongsToWorkerThread(); |
| |
| private: |
| friend class base::RefCountedThreadSafe<GpuVSyncWorker>; |
| ~GpuVSyncWorker() override; |
| |
| void Reschedule(); |
| void OpenAdapter(const wchar_t* device_name); |
| void CloseAdapter(); |
| bool WaitForVBlankEvent(); |
| |
| // Specifies whether background tasks are running. |
| // This can be set on background thread only. |
| bool running_ = false; |
| |
| // Specified whether the worker is enabled. This is accessed from both |
| // threads but can be changed on the main thread only. |
| base::subtle::AtomicWord enabled_ = false; |
| |
| const gfx::VSyncProvider::UpdateVSyncCallback callback_; |
| const SurfaceHandle surface_handle_; |
| |
| // The actual timing and interval comes from the nested provider. |
| std::unique_ptr<gl::VSyncProviderWin> vsync_provider_; |
| |
| PFND3DKMTOPENADAPTERFROMHDC open_adapter_from_hdc_ptr_; |
| PFND3DKMTCLOSEADAPTER close_adapter_ptr_; |
| PFND3DKMTWAITFORVERTICALBLANKEVENT wait_for_vertical_blank_event_ptr_; |
| |
| std::wstring current_device_name_; |
| D3DKMT_HANDLE current_adapter_handle_ = 0; |
| D3DDDI_VIDEO_PRESENT_SOURCE_ID current_source_id_ = 0; |
| }; |
| |
| GpuVSyncWorker::GpuVSyncWorker( |
| const gfx::VSyncProvider::UpdateVSyncCallback& callback, |
| SurfaceHandle surface_handle) |
| : base::Thread(base::StringPrintf("VSync-%d", surface_handle)), |
| callback_(callback), |
| surface_handle_(surface_handle), |
| vsync_provider_(new gl::VSyncProviderWin(surface_handle)) { |
| HMODULE gdi32 = GetModuleHandle(L"gdi32"); |
| if (!gdi32) { |
| NOTREACHED() << "Can't open gdi32.dll"; |
| return; |
| } |
| |
| open_adapter_from_hdc_ptr_ = reinterpret_cast<PFND3DKMTOPENADAPTERFROMHDC>( |
| ::GetProcAddress(gdi32, "D3DKMTOpenAdapterFromHdc")); |
| if (!open_adapter_from_hdc_ptr_) { |
| NOTREACHED() << "Can't find D3DKMTOpenAdapterFromHdc in gdi32.dll"; |
| return; |
| } |
| |
| close_adapter_ptr_ = reinterpret_cast<PFND3DKMTCLOSEADAPTER>( |
| ::GetProcAddress(gdi32, "D3DKMTCloseAdapter")); |
| if (!close_adapter_ptr_) { |
| NOTREACHED() << "Can't find D3DKMTCloseAdapter in gdi32.dll"; |
| return; |
| } |
| |
| wait_for_vertical_blank_event_ptr_ = |
| reinterpret_cast<PFND3DKMTWAITFORVERTICALBLANKEVENT>( |
| ::GetProcAddress(gdi32, "D3DKMTWaitForVerticalBlankEvent")); |
| if (!wait_for_vertical_blank_event_ptr_) { |
| NOTREACHED() << "Can't find D3DKMTWaitForVerticalBlankEvent in gdi32.dll"; |
| return; |
| } |
| } |
| |
| GpuVSyncWorker::~GpuVSyncWorker() = default; |
| |
| void GpuVSyncWorker::CleanupAndStop() { |
| Enable(false); |
| // Thread::Close() call below will block until this task has finished running |
| // so it is safe to post it here and pass unretained pointer. |
| task_runner()->PostTask(FROM_HERE, base::Bind(&GpuVSyncWorker::CloseAdapter, |
| base::Unretained(this))); |
| Stop(); |
| |
| DCHECK_EQ(0u, current_adapter_handle_); |
| DCHECK(current_device_name_.empty()); |
| } |
| |
| void GpuVSyncWorker::Enable(bool enabled) { |
| auto was_enabled = base::subtle::NoBarrier_AtomicExchange(&enabled_, enabled); |
| |
| if (enabled && !was_enabled) |
| task_runner()->PostTask( |
| FROM_HERE, base::Bind(&GpuVSyncWorker::StartRunningVSyncOnThread, |
| base::Unretained(this))); |
| } |
| |
| bool GpuVSyncWorker::BelongsToWorkerThread() { |
| return base::PlatformThread::CurrentId() == GetThreadId(); |
| } |
| |
| void GpuVSyncWorker::StartRunningVSyncOnThread() { |
| DCHECK(BelongsToWorkerThread()); |
| |
| if (!running_) { |
| running_ = true; |
| WaitForVSyncOnThread(); |
| } |
| } |
| |
| void GpuVSyncWorker::WaitForVSyncOnThread() { |
| DCHECK(BelongsToWorkerThread()); |
| |
| TRACE_EVENT0("gpu", "GpuVSyncWorker::WaitForVSyncOnThread"); |
| |
| HMONITOR monitor = |
| MonitorFromWindow(surface_handle_, MONITOR_DEFAULTTONEAREST); |
| MONITORINFOEX monitor_info; |
| monitor_info.cbSize = sizeof(MONITORINFOEX); |
| BOOL success = GetMonitorInfo(monitor, &monitor_info); |
| CHECK(success); |
| |
| if (current_device_name_.compare(monitor_info.szDevice) != 0) { |
| // Monitor changed. Close the current adapter handle and open a new one. |
| CloseAdapter(); |
| OpenAdapter(monitor_info.szDevice); |
| } |
| |
| if (WaitForVBlankEvent()) { |
| vsync_provider_->GetVSyncParameters( |
| base::Bind(&GpuVSyncWorker::SendVSyncUpdate, base::Unretained(this), |
| base::TimeTicks::Now())); |
| } |
| |
| Reschedule(); |
| } |
| |
| void GpuVSyncWorker::SendVSyncUpdate(base::TimeTicks now, |
| base::TimeTicks timestamp, |
| base::TimeDelta interval) { |
| base::TimeDelta adjustment; |
| |
| if (!(timestamp.is_null() || interval.is_zero())) { |
| // Timestamp comes from DwmGetCompositionTimingInfo and apparently it might |
| // be up to 2-3 vsync cycles in the past or in the future. |
| // The adjustment formula was suggested here: |
| // http://www.vsynctester.com/firefoxisbroken.html |
| base::TimeDelta adjustment = |
| ((now - timestamp + interval / 8) % interval + interval) % interval - |
| interval / 8; |
| timestamp = now - adjustment; |
| } else { |
| // DWM must be disabled. |
| timestamp = now; |
| } |
| |
| TRACE_EVENT1("gpu", "GpuVSyncWorker::SendVSyncUpdate", "adjustment", |
| adjustment.ToInternalValue()); |
| |
| if (base::subtle::NoBarrier_Load(&enabled_)) { |
| callback_.Run(timestamp, interval); |
| } |
| } |
| |
| void GpuVSyncWorker::Reschedule() { |
| // Restart the task if still enabled. |
| if (base::subtle::NoBarrier_Load(&enabled_)) { |
| task_runner()->PostTask(FROM_HERE, |
| base::Bind(&GpuVSyncWorker::WaitForVSyncOnThread, |
| base::Unretained(this))); |
| } else { |
| running_ = false; |
| } |
| } |
| |
| void GpuVSyncWorker::OpenAdapter(const wchar_t* device_name) { |
| DCHECK_EQ(0u, current_adapter_handle_); |
| |
| HDC hdc = CreateDC(NULL, device_name, NULL, NULL); |
| |
| D3DKMT_OPENADAPTERFROMHDC open_adapter_data; |
| open_adapter_data.hDc = hdc; |
| |
| NTSTATUS result = open_adapter_from_hdc_ptr_(&open_adapter_data); |
| DeleteDC(hdc); |
| |
| CHECK(result == STATUS_SUCCESS); |
| |
| current_device_name_ = device_name; |
| current_adapter_handle_ = open_adapter_data.hAdapter; |
| current_source_id_ = open_adapter_data.VidPnSourceId; |
| } |
| |
| void GpuVSyncWorker::CloseAdapter() { |
| if (current_adapter_handle_ != 0) { |
| D3DKMT_CLOSEADAPTER close_adapter_data; |
| close_adapter_data.hAdapter = current_adapter_handle_; |
| |
| NTSTATUS result = close_adapter_ptr_(&close_adapter_data); |
| CHECK(result == STATUS_SUCCESS); |
| |
| current_adapter_handle_ = 0; |
| current_device_name_.clear(); |
| } |
| } |
| |
| bool GpuVSyncWorker::WaitForVBlankEvent() { |
| D3DKMT_WAITFORVERTICALBLANKEVENT wait_for_vertical_blank_event_data; |
| wait_for_vertical_blank_event_data.hAdapter = current_adapter_handle_; |
| wait_for_vertical_blank_event_data.hDevice = 0; |
| wait_for_vertical_blank_event_data.VidPnSourceId = current_source_id_; |
| |
| NTSTATUS result = |
| wait_for_vertical_blank_event_ptr_(&wait_for_vertical_blank_event_data); |
| |
| return result == STATUS_SUCCESS; |
| } |
| |
| // MessageFilter class for sending and receiving IPC messages |
| // directly, avoiding routing them through the main GPU thread. |
| class GpuVSyncMessageFilter : public IPC::MessageFilter { |
| public: |
| explicit GpuVSyncMessageFilter( |
| const scoped_refptr<GpuVSyncWorker>& vsync_worker, |
| int32_t route_id) |
| : vsync_worker_(vsync_worker), route_id_(route_id) {} |
| |
| // IPC::MessageFilter overrides. |
| void OnChannelError() override { Reset(); } |
| void OnChannelClosing() override { Reset(); } |
| void OnFilterAdded(IPC::Channel* channel) override; |
| void OnFilterRemoved() override { Reset(); } |
| bool OnMessageReceived(const IPC::Message& msg) override; |
| |
| // Send can be called from GpuVSyncWorker thread. |
| void Send(std::unique_ptr<IPC::Message> message); |
| |
| int32_t route_id() const { return route_id_; } |
| |
| private: |
| ~GpuVSyncMessageFilter() override = default; |
| void SendOnIOThread(std::unique_ptr<IPC::Message> message); |
| void Reset(); |
| |
| scoped_refptr<GpuVSyncWorker> vsync_worker_; |
| // The sender to which this filter was added. |
| IPC::Sender* sender_ = nullptr; |
| // The sender must be invoked on IO thread. |
| scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_; |
| const int32_t route_id_; |
| }; |
| |
| void GpuVSyncMessageFilter::OnFilterAdded(IPC::Channel* channel) { |
| io_task_runner_ = base::ThreadTaskRunnerHandle::Get(); |
| sender_ = channel; |
| } |
| |
| void GpuVSyncMessageFilter::Reset() { |
| sender_ = nullptr; |
| vsync_worker_->Enable(false); |
| } |
| |
| bool GpuVSyncMessageFilter::OnMessageReceived(const IPC::Message& msg) { |
| if (msg.routing_id() != route_id_) |
| return false; |
| |
| IPC_BEGIN_MESSAGE_MAP(GpuVSyncMessageFilter, msg) |
| IPC_MESSAGE_FORWARD(GpuCommandBufferMsg_SetNeedsVSync, vsync_worker_.get(), |
| GpuVSyncWorker::Enable); |
| IPC_MESSAGE_UNHANDLED(return false) |
| IPC_END_MESSAGE_MAP() |
| return true; |
| } |
| |
| void GpuVSyncMessageFilter::Send(std::unique_ptr<IPC::Message> message) { |
| io_task_runner_->PostTask( |
| FROM_HERE, base::Bind(&GpuVSyncMessageFilter::SendOnIOThread, this, |
| base::Passed(&message))); |
| } |
| |
| void GpuVSyncMessageFilter::SendOnIOThread( |
| std::unique_ptr<IPC::Message> message) { |
| DCHECK(io_task_runner_->BelongsToCurrentThread()); |
| DCHECK(!message->is_sync()); |
| if (!sender_) |
| return; |
| |
| sender_->Send(message.release()); |
| } |
| |
| GpuVSyncProviderWin::GpuVSyncProviderWin( |
| base::WeakPtr<ImageTransportSurfaceDelegate> delegate, |
| SurfaceHandle surface_handle) { |
| vsync_worker_ = new GpuVSyncWorker( |
| base::Bind(&GpuVSyncProviderWin::OnVSync, base::Unretained(this)), |
| surface_handle); |
| message_filter_ = |
| new GpuVSyncMessageFilter(vsync_worker_, delegate->GetRouteID()); |
| delegate->AddFilter(message_filter_.get()); |
| |
| // Start the thread. |
| base::Thread::Options options; |
| // TODO(stanisc): might consider even higher priority - REALTIME_AUDIO. |
| options.priority = base::ThreadPriority::DISPLAY; |
| vsync_worker_->StartWithOptions(options); |
| } |
| |
| GpuVSyncProviderWin::~GpuVSyncProviderWin() { |
| vsync_worker_->CleanupAndStop(); |
| } |
| |
| void GpuVSyncProviderWin::GetVSyncParameters( |
| const UpdateVSyncCallback& callback) { |
| // This is ignored and the |callback| is never called back. The timestamp |
| // and interval are posted directly via |
| // GpuCommandBufferMsg_UpdateVSyncParameters message sent from the worker |
| // thread. |
| } |
| |
| void GpuVSyncProviderWin::OnVSync(base::TimeTicks timestamp, |
| base::TimeDelta interval) { |
| DCHECK(vsync_worker_->BelongsToWorkerThread()); |
| |
| message_filter_->Send( |
| base::MakeUnique<GpuCommandBufferMsg_UpdateVSyncParameters>( |
| message_filter_->route_id(), timestamp, interval)); |
| } |
| |
| } // namespace gpu |