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content / browser / media / capture / frame_sink_video_capture_device.cc [blame]
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/media/capture/frame_sink_video_capture_device.h"
#include <optional>
#include "base/check_op.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "base/task/bind_post_task.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "base/token.h"
#include "build/build_config.h"
#include "components/viz/common/surfaces/subtree_capture_id.h"
#include "components/viz/host/host_frame_sink_manager.h"
#include "content/browser/compositor/surface_utils.h"
#include "content/browser/gpu/gpu_data_manager_impl.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/device_service.h"
#include "gpu/command_buffer/common/capabilities.h"
#include "media/base/video_types.h"
#include "media/capture/mojom/video_capture_types.mojom.h"
#include "media/capture/video_capture_types.h"
#include "services/device/public/mojom/wake_lock_provider.mojom.h"
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
#include "content/browser/media/capture/mouse_cursor_overlay_controller.h"
#endif
#if BUILDFLAG(IS_MAC) || defined(USE_AURA)
#include "components/viz/common/gpu/context_provider.h"
#include "content/browser/compositor/image_transport_factory.h"
#include "gpu/command_buffer/common/capabilities.h"
#endif
namespace content {
namespace {
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
constexpr int32_t kMouseCursorStackingIndex = 1;
#endif
// Transfers ownership of an object to a std::unique_ptr with a custom deleter
// that ensures the object is destroyed on the UI BrowserThread.
template <typename T>
std::unique_ptr<T, BrowserThread::DeleteOnUIThread> RescopeToUIThread(
std::unique_ptr<T>&& ptr) {
return std::unique_ptr<T, BrowserThread::DeleteOnUIThread>(ptr.release());
}
void BindWakeLockProvider(
mojo::PendingReceiver<device::mojom::WakeLockProvider> receiver) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
GetDeviceService().BindWakeLockProvider(std::move(receiver));
}
scoped_refptr<viz::RasterContextProvider> GetContextProvider() {
#if BUILDFLAG(IS_MAC) || defined(USE_AURA)
auto* image_transport_factory = ImageTransportFactory::GetInstance();
DCHECK(image_transport_factory);
auto* ui_context_factory = image_transport_factory->GetContextFactory();
if (!ui_context_factory) {
return nullptr;
}
return ui_context_factory->SharedMainThreadRasterContextProvider();
#else
return nullptr;
#endif
}
} // namespace
// Helper class that is used to observe the `viz::ContextProvider` for context
// loss events and communicate latest `gpu::Capabilities` after context loss.
class ContextProviderObserver : viz::ContextLostObserver {
public:
using OnGpuCapabilitiesFetched =
base::RepeatingCallback<void(std::optional<gpu::Capabilities>)>;
// Constructs the instance of the class. The construction can happen on any
// thread, but the instance must be destroyed on the UI thread.
// |on_gpu_capabilities_fetched_| will be invoked after they have been
// obtained, and then each time they have been re-fetched after a context
// loss. The callback will be invoked on the sequence that was used to
// construct this instance.
explicit ContextProviderObserver(
OnGpuCapabilitiesFetched on_gpu_capabilities_fetched)
: on_gpu_capabilities_fetched_(
base::BindPostTaskToCurrentDefault(on_gpu_capabilities_fetched)) {
DETACH_FROM_SEQUENCE(main_sequence_checker_);
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(
&ContextProviderObserver::GetContextProviderOnMainSequence,
weak_factory_.GetWeakPtr()));
}
~ContextProviderObserver() override {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
if (context_provider_) {
context_provider_->RemoveObserver(this);
}
}
protected:
void OnContextLost() override {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
context_provider_->RemoveObserver(this);
context_provider_ = nullptr;
GetContextProviderOnMainSequence();
}
private:
void GetContextProviderOnMainSequence() {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
context_provider_ = GetContextProvider();
if (!context_provider_) {
on_gpu_capabilities_fetched_.Run(std::nullopt);
return;
}
context_provider_->AddObserver(this);
on_gpu_capabilities_fetched_.Run(context_provider_->ContextCapabilities());
}
// Task runner on which this instance was created.
scoped_refptr<base::SequencedTaskRunner> task_runner_;
const OnGpuCapabilitiesFetched on_gpu_capabilities_fetched_;
// Context provider that was used to query the GPU capabilities. May be null.
scoped_refptr<viz::RasterContextProvider> context_provider_
GUARDED_BY_CONTEXT(main_sequence_checker_);
SEQUENCE_CHECKER(main_sequence_checker_);
// Must be last.
base::WeakPtrFactory<ContextProviderObserver> weak_factory_{this};
};
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
FrameSinkVideoCaptureDevice::FrameSinkVideoCaptureDevice()
: cursor_controller_(
RescopeToUIThread(std::make_unique<MouseCursorOverlayController>())) {
DCHECK(cursor_controller_);
}
#else
FrameSinkVideoCaptureDevice::FrameSinkVideoCaptureDevice() = default;
#endif
FrameSinkVideoCaptureDevice::~FrameSinkVideoCaptureDevice() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!receiver_) << "StopAndDeAllocate() was never called after start.";
}
bool FrameSinkVideoCaptureDevice::CanSupportNV12Format() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// TODO(crbug.com/41491504): Determine if we actually need to know the format
// client-side (which is what this method is used for) beyond sending it over
// to the service side. If not, compute this information service-side. If yes,
// port all of the below code to be a check on SharedImageCapabilities once
// the latter is fully fleshed out (crbug.com/1482371).
auto* gpu_data_manager = GpuDataManagerImpl::GetInstance();
if (!gpu_data_manager) {
return false;
}
// If GPU compositing is disabled, we cannot use NV12 (software renderer does
// not support returning results in textures, and FrameSinkVideoCapturerImpl
// does not support NV12 otherwise):
if (gpu_data_manager->IsGpuCompositingDisabled()) {
return false;
}
// SwiftShader does not support copying directly to NV12.
if (gpu_data_manager->GetGPUInfo().UsesSwiftShader()) {
return false;
}
// We only support NV12 if GL_EXT_texture_rg extension is available. GPU
// capabilities need to be present in order to determine that.
if (!gpu_capabilities_) {
return false;
}
// If present, GPU capabilities should already be up to date (this is ensured
// by subscribing to context lost events via `context_provider_observer_`
// helper):
return gpu_capabilities_->texture_rg;
}
media::VideoPixelFormat
FrameSinkVideoCaptureDevice::GetDesiredVideoPixelFormat() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (capture_params_.requested_format.pixel_format !=
media::VideoPixelFormat::PIXEL_FORMAT_UNKNOWN)
return capture_params_.requested_format.pixel_format;
return CanSupportNV12Format() ? media::VideoPixelFormat::PIXEL_FORMAT_NV12
: media::VideoPixelFormat::PIXEL_FORMAT_I420;
}
void FrameSinkVideoCaptureDevice::ObserveContextProvider() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Create an observer that will invoke `SetGpuCapabilitiesOnDevice()` every
// time a context was lost:
context_provider_observer_ = RescopeToUIThread(
std::make_unique<ContextProviderObserver>(base::BindRepeating(
&FrameSinkVideoCaptureDevice::SetGpuCapabilitiesOnDevice,
weak_factory_.GetWeakPtr())));
}
void FrameSinkVideoCaptureDevice::SetGpuCapabilitiesOnDevice(
std::optional<gpu::Capabilities> capabilities) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
gpu_capabilities_ = capabilities;
if (!receiver_) {
// It seems that we're being called after the receiver was already reset in
// `StopAndDeAllocate()` but before the dtor ran. If that's the case, we
// don't need to do anything here since either the dtor will be called
// shortly, or the observer will be re-initialized to a new instance in
// `AllocateAndStartWithReceiver()`.
return;
}
if (capturer_) {
RestartCapturerIfNeeded();
} else {
AllocateAndStartWithReceiverInternal();
}
}
void FrameSinkVideoCaptureDevice::AllocateAndStartWithReceiver(
const media::VideoCaptureParams& params,
std::unique_ptr<media::VideoFrameReceiver> receiver) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(params.IsValid());
DCHECK(receiver);
DCHECK(!receiver_);
receiver_ = std::move(receiver);
capture_params_ = params;
// If the device has already ended on a fatal error, abort immediately.
if (fatal_error_message_) {
receiver_->OnLog(*fatal_error_message_);
receiver_->OnError(
media::VideoCaptureError::
kFrameSinkVideoCaptureDeviceAlreadyEndedOnFatalError);
receiver_ = nullptr;
return;
}
if (params.requested_format.pixel_format == media::PIXEL_FORMAT_UNKNOWN) {
// Kick off a task to query GPU context capabilities. The flow will continue
// in `SetGpuCapabilitiesOnDevice()`, which will then call into
// `AllocateAndStartWithReceiverInternal()` because the `capturer_` isn't
// set yet.
ObserveContextProvider();
return;
}
AllocateAndStartWithReceiverInternal();
}
void FrameSinkVideoCaptureDevice::AllocateAndStartWithReceiverInternal() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(receiver_);
WillStart();
// Shutdown the prior capturer, if any.
MaybeStopConsuming();
media::VideoPixelFormat pixel_format =
capture_params_.requested_format.pixel_format;
if (pixel_format == media::PIXEL_FORMAT_UNKNOWN) {
// The caller opted into smart pixel format selection, see if we can support
// NV12 & decide which format to use based on that.
pixel_format = GetDesiredVideoPixelFormat();
}
AllocateCapturer(pixel_format);
receiver_->OnStarted();
if (!suspend_requested_) {
MaybeStartConsuming();
}
DCHECK(!wake_lock_);
RequestWakeLock();
}
void FrameSinkVideoCaptureDevice::AllocateCapturer(
media::VideoPixelFormat pixel_format) {
DCHECK_NE(pixel_format, media::VideoPixelFormat::PIXEL_FORMAT_UNKNOWN);
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
capturer_ = std::make_unique<viz::ClientFrameSinkVideoCapturer>(
base::BindRepeating(&FrameSinkVideoCaptureDevice::CreateCapturer,
base::Unretained(this)));
capturer_->SetFormat(pixel_format);
capturer_->SetMinCapturePeriod(
base::Microseconds(base::saturated_cast<int64_t>(
base::Time::kMicrosecondsPerSecond /
capture_params_.requested_format.frame_rate)));
const auto& constraints = capture_params_.SuggestConstraints();
capturer_->SetResolutionConstraints(constraints.min_frame_size,
constraints.max_frame_size,
constraints.fixed_aspect_ratio);
if (target_) {
capturer_->ChangeTarget(target_, sub_capture_target_version_);
}
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&MouseCursorOverlayController::Start,
cursor_controller_->GetWeakPtr(),
capturer_->CreateOverlay(kMouseCursorStackingIndex),
base::SingleThreadTaskRunner::GetCurrentDefault()));
#endif
}
void FrameSinkVideoCaptureDevice::AllocateAndStart(
const media::VideoCaptureParams& params,
std::unique_ptr<media::VideoCaptureDevice::Client> client) {
// FrameSinkVideoCaptureDevice does not use a
// VideoCaptureDevice::Client. Instead, it provides frames to a
// VideoFrameReceiver directly.
NOTREACHED_IN_MIGRATION();
}
void FrameSinkVideoCaptureDevice::RestartCapturerIfNeeded() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Desired pixel format may have changed due to the change in
// `gpu_capabilities_` - we need to recompute it and determine if the capturer
// needs to be restarted based on the new desired format:
media::VideoPixelFormat desired_format = GetDesiredVideoPixelFormat();
if (capturer_ && capturer_->GetFormat().has_value() &&
*capturer_->GetFormat() != desired_format) {
MaybeStopConsuming();
AllocateCapturer(desired_format);
if (!suspend_requested_) {
MaybeStartConsuming();
}
}
}
void FrameSinkVideoCaptureDevice::RequestRefreshFrame() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (capturer_ && !suspend_requested_) {
capturer_->RequestRefreshFrame();
}
}
void FrameSinkVideoCaptureDevice::MaybeSuspend() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
suspend_requested_ = true;
MaybeStopConsuming();
}
void FrameSinkVideoCaptureDevice::Resume() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
suspend_requested_ = false;
MaybeStartConsuming();
}
void FrameSinkVideoCaptureDevice::ApplySubCaptureTarget(
media::mojom::SubCaptureTargetType type,
const base::Token& target,
uint32_t sub_capture_target_version,
base::OnceCallback<void(media::mojom::ApplySubCaptureTargetResult)>
callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(callback);
std::move(callback).Run(
media::mojom::ApplySubCaptureTargetResult::kUnsupportedCaptureDevice);
}
void FrameSinkVideoCaptureDevice::StopAndDeAllocate() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (wake_lock_) {
wake_lock_->CancelWakeLock();
wake_lock_.reset();
}
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&MouseCursorOverlayController::Stop,
cursor_controller_->GetWeakPtr()));
#endif
MaybeStopConsuming();
capturer_.reset();
context_provider_observer_.reset();
if (receiver_) {
receiver_.reset();
DidStop();
}
}
void FrameSinkVideoCaptureDevice::OnUtilizationReport(
media::VideoCaptureFeedback feedback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (!feedback.frame_id.has_value())
return;
const auto index = static_cast<size_t>(feedback.frame_id.value());
DCHECK_LT(index, frame_callbacks_.size());
// In most cases, we expect that the mojo InterfacePtr in |frame_callbacks_|
// should be valid because this method will always be called before the
// VideoFrameReceiver signals that it is done consuming the frame. However,
// some capturers (e.g. Lacros) involve some extra mojo hops that may mean
// we got scheduled after the VideoFrameReceiver signaled it was done.
const auto& callback = frame_callbacks_[index];
if (callback.is_bound())
callback->ProvideFeedback(feedback);
}
void FrameSinkVideoCaptureDevice::OnFrameCaptured(
media::mojom::VideoBufferHandlePtr data,
media::mojom::VideoFrameInfoPtr info,
const gfx::Rect& content_rect,
mojo::PendingRemote<viz::mojom::FrameSinkVideoConsumerFrameCallbacks>
callbacks) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(callbacks);
mojo::Remote<viz::mojom::FrameSinkVideoConsumerFrameCallbacks>
callbacks_remote(std::move(callbacks));
if (!receiver_ || !data) {
callbacks_remote->Done();
return;
}
// Search for the next available element in |frame_callbacks_| and bind
// |callbacks| there.
size_t index = 0;
for (;; ++index) {
if (index == frame_callbacks_.size()) {
// The growth of |frame_callbacks_| should be bounded because the
// viz::mojom::FrameSinkVideoCapturer should enforce an upper-bound on the
// number of frames in-flight.
constexpr size_t kMaxInFlightFrames = 32; // Arbitrarily-chosen limit.
DCHECK_LT(frame_callbacks_.size(), kMaxInFlightFrames);
frame_callbacks_.emplace_back(std::move(callbacks_remote));
break;
}
if (!frame_callbacks_[index].is_bound()) {
frame_callbacks_[index] = std::move(callbacks_remote);
break;
}
}
const BufferId buffer_id = static_cast<BufferId>(index);
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
info->metadata.interactive_content =
cursor_controller_->IsUserInteractingWithView();
#else
// Since we don't have a cursor controller, on Android we'll just always
// assume the user is interacting with the view.
info->metadata.interactive_content = true;
#endif
// Pass the video frame to the VideoFrameReceiver. This is done by first
// passing the shared memory buffer handle and then notifying it that a new
// frame is ready to be read from the buffer.
receiver_->OnNewBuffer(buffer_id, std::move(data));
receiver_->OnFrameReadyInBuffer(media::ReadyFrameInBuffer(
buffer_id, buffer_id,
std::make_unique<media::ScopedFrameDoneHelper>(base::BindOnce(
&FrameSinkVideoCaptureDevice::OnFramePropagationComplete,
weak_factory_.GetWeakPtr(), buffer_id)),
std::move(info)));
}
void FrameSinkVideoCaptureDevice::OnNewSubCaptureTargetVersion(
uint32_t sub_capture_target_version) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (!receiver_) {
return;
}
receiver_->OnNewSubCaptureTargetVersion(sub_capture_target_version);
}
void FrameSinkVideoCaptureDevice::OnFrameWithEmptyRegionCapture() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (!receiver_) {
return;
}
receiver_->OnFrameWithEmptyRegionCapture();
}
void FrameSinkVideoCaptureDevice::OnStopped() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// This method would never be called if FrameSinkVideoCaptureDevice explicitly
// called capturer_->StopAndResetConsumer(), because the binding is closed at
// that time. Therefore, a call to this method means that the capturer cannot
// continue; and that's a permanent failure.
OnFatalError("Capturer service cannot continue.");
}
void FrameSinkVideoCaptureDevice::OnLog(const std::string& message) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (receiver_) {
receiver_->OnLog(message);
}
}
void FrameSinkVideoCaptureDevice::OnTargetChanged(
const std::optional<viz::VideoCaptureTarget>& target,
uint32_t sub_capture_target_version) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK_GE(sub_capture_target_version, sub_capture_target_version_);
target_ = target;
sub_capture_target_version_ = sub_capture_target_version;
if (capturer_) {
capturer_->ChangeTarget(target_, sub_capture_target_version_);
}
}
void FrameSinkVideoCaptureDevice::OnTargetPermanentlyLost() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
OnTargetChanged(std::nullopt, sub_capture_target_version_);
OnFatalError("Capture target has been permanently lost.");
}
void FrameSinkVideoCaptureDevice::WillStart() {}
void FrameSinkVideoCaptureDevice::DidStop() {}
void FrameSinkVideoCaptureDevice::CreateCapturer(
mojo::PendingReceiver<viz::mojom::FrameSinkVideoCapturer> receiver) {
CreateCapturerViaGlobalManager(std::move(receiver));
}
// static
void FrameSinkVideoCaptureDevice::CreateCapturerViaGlobalManager(
mojo::PendingReceiver<viz::mojom::FrameSinkVideoCapturer> receiver) {
// Send the receiver to UI thread because that's where HostFrameSinkManager
// lives.
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(
[](mojo::PendingReceiver<viz::mojom::FrameSinkVideoCapturer>
receiver) {
viz::HostFrameSinkManager* const manager =
GetHostFrameSinkManager();
DCHECK(manager);
manager->CreateVideoCapturer(std::move(receiver));
},
std::move(receiver)));
}
void FrameSinkVideoCaptureDevice::MaybeStartConsuming() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (!receiver_ || !capturer_) {
return;
}
capturer_->Start(this,
viz::mojom::BufferFormatPreference::kPreferGpuMemoryBuffer);
}
void FrameSinkVideoCaptureDevice::MaybeStopConsuming() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (capturer_)
capturer_->StopAndResetConsumer();
}
void FrameSinkVideoCaptureDevice::OnFramePropagationComplete(
BufferId buffer_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Notify the VideoFrameReceiver that the buffer is no longer valid.
if (receiver_) {
receiver_->OnBufferRetired(buffer_id);
}
// Notify the capturer that consumption of the frame is complete.
const size_t index = static_cast<size_t>(buffer_id);
DCHECK_LT(index, frame_callbacks_.size());
auto& callbacks_ptr = frame_callbacks_[index];
callbacks_ptr->Done();
callbacks_ptr.reset();
}
void FrameSinkVideoCaptureDevice::OnFatalError(std::string message) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
fatal_error_message_ = std::move(message);
if (receiver_) {
receiver_->OnLog(*fatal_error_message_);
receiver_->OnError(media::VideoCaptureError::
kFrameSinkVideoCaptureDeviceEncounteredFatalError);
}
StopAndDeAllocate();
}
void FrameSinkVideoCaptureDevice::RequestWakeLock() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
mojo::Remote<device::mojom::WakeLockProvider> wake_lock_provider;
auto receiver = wake_lock_provider.BindNewPipeAndPassReceiver();
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&BindWakeLockProvider, std::move(receiver)));
wake_lock_provider->GetWakeLockWithoutContext(
device::mojom::WakeLockType::kPreventDisplaySleep,
device::mojom::WakeLockReason::kOther, "screen capture",
wake_lock_.BindNewPipeAndPassReceiver());
wake_lock_->RequestWakeLock();
}
} // namespace content