blob: 0d5b3a1468cf5e6f86f67917da3045012bbdfcb3 [file] [log] [blame]
// Copyright 2017 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 "services/video_capture/video_capture_service_impl.h"
#include <utility>
#include "base/bind.h"
#include "base/feature_list.h"
#include "base/task/post_task.h"
#include "base/task/thread_pool.h"
#include "build/build_config.h"
#include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
#include "media/capture/video/create_video_capture_device_factory.h"
#include "media/capture/video/fake_video_capture_device_factory.h"
#include "media/capture/video/video_capture_buffer_pool.h"
#include "media/capture/video/video_capture_buffer_tracker.h"
#include "media/capture/video/video_capture_system_impl.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "services/video_capture/device_factory_media_to_mojo_adapter.h"
#include "services/video_capture/testing_controls_impl.h"
#include "services/video_capture/video_source_provider_impl.h"
#include "services/video_capture/virtual_device_enabled_device_factory.h"
#include "services/viz/public/cpp/gpu/gpu.h"
#if defined(OS_MACOSX)
#include "media/capture/video/mac/video_capture_device_factory_mac.h"
#endif
namespace video_capture {
namespace {
// Used to assess the impact of running the video capture service at background
// priority. If the experiment confirms that running the video capture service
// at background priority causes jank, change the code to use a foreground
// priority by default. See https://crbug.com/1066137.
const base::Feature kForegroundVideoCaptureService{
"ForegroundVideoCaptureService", base::FEATURE_DISABLED_BY_DEFAULT};
} // namespace
// Intended usage of this class is to instantiate on any sequence, and then
// operate and release the instance on the task runner exposed via
// GetTaskRunner() via WeakPtrs provided via GetWeakPtr(). To this end,
// GetTaskRunner() and GetWeakPtr() can be called from any sequence, typically
// the same as the one calling the constructor.
class VideoCaptureServiceImpl::GpuDependenciesContext {
public:
GpuDependenciesContext() {
const base::TaskPriority priority =
base::FeatureList::IsEnabled(kForegroundVideoCaptureService)
? base::TaskPriority::USER_BLOCKING
: base::TaskPriority::BEST_EFFORT;
gpu_io_task_runner_ = base::ThreadPool::CreateSequencedTaskRunner(
{priority, base::MayBlock()});
}
~GpuDependenciesContext() {
DCHECK(gpu_io_task_runner_->RunsTasksInCurrentSequence());
}
base::WeakPtr<GpuDependenciesContext> GetWeakPtr() {
return weak_factory_for_gpu_io_thread_.GetWeakPtr();
}
scoped_refptr<base::SequencedTaskRunner> GetTaskRunner() {
return gpu_io_task_runner_;
}
#if defined(OS_CHROMEOS)
void InjectGpuDependencies(
mojo::PendingRemote<mojom::AcceleratorFactory> accelerator_factory_info) {
DCHECK(gpu_io_task_runner_->RunsTasksInCurrentSequence());
accelerator_factory_.reset();
accelerator_factory_.Bind(std::move(accelerator_factory_info));
}
void CreateJpegDecodeAccelerator(
mojo::PendingReceiver<chromeos_camera::mojom::MjpegDecodeAccelerator>
receiver) {
DCHECK(gpu_io_task_runner_->RunsTasksInCurrentSequence());
if (!accelerator_factory_)
return;
accelerator_factory_->CreateJpegDecodeAccelerator(std::move(receiver));
}
#endif // defined(OS_CHROMEOS)
private:
// Task runner for operating |accelerator_factory_| and
// |gpu_memory_buffer_manager_| on. This must be a different thread from the
// main service thread in order to avoid a deadlock during shutdown where
// the main service thread joins a video capture device thread that, in turn,
// will try to post the release of the jpeg decoder to the thread it is
// operated on.
scoped_refptr<base::SequencedTaskRunner> gpu_io_task_runner_;
#if defined(OS_CHROMEOS)
mojo::Remote<mojom::AcceleratorFactory> accelerator_factory_;
#endif // defined(OS_CHROMEOS)
base::WeakPtrFactory<GpuDependenciesContext> weak_factory_for_gpu_io_thread_{
this};
};
VideoCaptureServiceImpl::VideoCaptureServiceImpl(
mojo::PendingReceiver<mojom::VideoCaptureService> receiver,
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
: receiver_(this, std::move(receiver)),
ui_task_runner_(std::move(ui_task_runner)) {}
VideoCaptureServiceImpl::~VideoCaptureServiceImpl() {
factory_receivers_.Clear();
device_factory_.reset();
#if defined(OS_CHROMEOS)
camera_app_device_bridge_.reset();
#endif // defined (OS_CHROMEOS)
if (gpu_dependencies_context_) {
gpu_dependencies_context_->GetTaskRunner()->DeleteSoon(
FROM_HERE, std::move(gpu_dependencies_context_));
}
}
#if defined(OS_CHROMEOS)
void VideoCaptureServiceImpl::InjectGpuDependencies(
mojo::PendingRemote<mojom::AcceleratorFactory> accelerator_factory) {
LazyInitializeGpuDependenciesContext();
gpu_dependencies_context_->GetTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&GpuDependenciesContext::InjectGpuDependencies,
gpu_dependencies_context_->GetWeakPtr(),
std::move(accelerator_factory)));
}
void VideoCaptureServiceImpl::ConnectToCameraAppDeviceBridge(
mojo::PendingReceiver<cros::mojom::CameraAppDeviceBridge> receiver) {
DCHECK(camera_app_device_bridge_);
camera_app_device_bridge_->BindReceiver(std::move(receiver));
}
#endif // defined(OS_CHROMEOS)
void VideoCaptureServiceImpl::ConnectToDeviceFactory(
mojo::PendingReceiver<mojom::DeviceFactory> receiver) {
LazyInitializeDeviceFactory();
factory_receivers_.Add(device_factory_.get(), std::move(receiver));
}
void VideoCaptureServiceImpl::ConnectToVideoSourceProvider(
mojo::PendingReceiver<mojom::VideoSourceProvider> receiver) {
LazyInitializeVideoSourceProvider();
video_source_provider_->AddClient(std::move(receiver));
}
void VideoCaptureServiceImpl::SetRetryCount(int32_t count) {
#if defined(OS_MACOSX)
media::VideoCaptureDeviceFactoryMac::SetGetDeviceDescriptorsRetryCount(count);
#endif
}
void VideoCaptureServiceImpl::BindControlsForTesting(
mojo::PendingReceiver<mojom::TestingControls> receiver) {
mojo::MakeSelfOwnedReceiver(std::make_unique<TestingControlsImpl>(),
std::move(receiver));
}
void VideoCaptureServiceImpl::LazyInitializeGpuDependenciesContext() {
if (!gpu_dependencies_context_)
gpu_dependencies_context_ = std::make_unique<GpuDependenciesContext>();
}
void VideoCaptureServiceImpl::LazyInitializeDeviceFactory() {
if (device_factory_)
return;
LazyInitializeGpuDependenciesContext();
// Create the platform-specific device factory.
// The task runner passed to CreateFactory is used for things that need to
// happen on a "UI thread equivalent", e.g. obtaining screen rotation on
// Chrome OS.
#if defined(OS_CHROMEOS)
camera_app_device_bridge_ =
std::make_unique<media::CameraAppDeviceBridgeImpl>();
std::unique_ptr<media::VideoCaptureDeviceFactory> media_device_factory =
media::CreateVideoCaptureDeviceFactory(ui_task_runner_,
camera_app_device_bridge_.get());
camera_app_device_bridge_->SetIsSupported(
media_device_factory->IsSupportedCameraAppDeviceBridge());
#else
std::unique_ptr<media::VideoCaptureDeviceFactory> media_device_factory =
media::CreateVideoCaptureDeviceFactory(ui_task_runner_);
#endif // defined(OS_CHROMEOS)
auto video_capture_system = std::make_unique<media::VideoCaptureSystemImpl>(
std::move(media_device_factory));
#if defined(OS_CHROMEOS)
device_factory_ = std::make_unique<VirtualDeviceEnabledDeviceFactory>(
std::make_unique<DeviceFactoryMediaToMojoAdapter>(
std::move(video_capture_system),
base::BindRepeating(
&GpuDependenciesContext::CreateJpegDecodeAccelerator,
gpu_dependencies_context_->GetWeakPtr()),
gpu_dependencies_context_->GetTaskRunner()));
#else
device_factory_ = std::make_unique<VirtualDeviceEnabledDeviceFactory>(
std::make_unique<DeviceFactoryMediaToMojoAdapter>(
std::move(video_capture_system)));
#endif // defined(OS_CHROMEOS)
}
void VideoCaptureServiceImpl::LazyInitializeVideoSourceProvider() {
if (video_source_provider_)
return;
LazyInitializeDeviceFactory();
video_source_provider_ = std::make_unique<VideoSourceProviderImpl>(
device_factory_.get(),
// Unretained(this) is safe, because |this| owns |video_source_provider_|.
base::BindRepeating(
&VideoCaptureServiceImpl::OnLastSourceProviderClientDisconnected,
base::Unretained(this)));
}
void VideoCaptureServiceImpl::OnLastSourceProviderClientDisconnected() {
video_source_provider_.reset();
}
} // namespace video_capture