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content / browser / media / stable_video_decoder_factory.cc [blame]
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/342213636): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include "content/public/browser/stable_video_decoder_factory.h"
#include "base/containers/queue.h"
#include "build/chromeos_buildflags.h"
#include "components/viz/common/switches.h"
#include "content/browser/gpu/gpu_data_manager_impl.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/gpu_data_manager_observer.h"
#include "content/public/browser/gpu_utils.h"
#include "content/public/browser/service_process_host.h"
#include "media/mojo/mojom/stable/stable_video_decoder.mojom.h"
#include "mojo/public/cpp/bindings/remote_set.h"
#if BUILDFLAG(IS_CHROMEOS_LACROS)
#include "chromeos/lacros/lacros_service.h"
#endif
namespace content {
#if BUILDFLAG(ALLOW_HOSTING_OOP_VIDEO_DECODER)
namespace {
// StableVideoDecoderFactoryProcessLauncher is a helper singleton class that
// launches utility processes to host a
// media::stable::mojom::StableVideoDecoderFactory once the gpu::GpuFeatureInfo
// is known.
class StableVideoDecoderFactoryProcessLauncher final
: public GpuDataManagerObserver {
public:
static StableVideoDecoderFactoryProcessLauncher& Instance() {
static base::NoDestructor<StableVideoDecoderFactoryProcessLauncher>
instance;
return *instance;
}
StableVideoDecoderFactoryProcessLauncher(
const StableVideoDecoderFactoryProcessLauncher&) = delete;
StableVideoDecoderFactoryProcessLauncher& operator=(
const StableVideoDecoderFactoryProcessLauncher&) = delete;
void LaunchWhenGpuFeatureInfoIsKnown(
mojo::PendingReceiver<media::stable::mojom::StableVideoDecoderFactory>
receiver) {
if (gpu_preferences_.disable_accelerated_video_decode) {
return;
}
if (ui_thread_task_runner_->RunsTasksInCurrentSequence()) {
LaunchWhenGpuFeatureInfoIsKnownOnUIThread(std::move(receiver));
return;
}
// base::Unretained(this) is safe because *|this| is never destroyed.
ui_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&StableVideoDecoderFactoryProcessLauncher::
LaunchWhenGpuFeatureInfoIsKnownOnUIThread,
base::Unretained(this), std::move(receiver)));
}
private:
friend class base::NoDestructor<StableVideoDecoderFactoryProcessLauncher>;
StableVideoDecoderFactoryProcessLauncher()
: ui_thread_task_runner_(GetUIThreadTaskRunner({})),
gpu_preferences_(content::GetGpuPreferencesFromCommandLine()) {}
~StableVideoDecoderFactoryProcessLauncher() final = default;
// GpuDataManagerObserver implementation.
void OnGpuInfoUpdate() final {
if (ui_thread_task_runner_->RunsTasksInCurrentSequence()) {
OnGpuInfoUpdateOnUIThread();
return;
}
// base::Unretained(this) is safe because *|this| is never destroyed.
ui_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&StableVideoDecoderFactoryProcessLauncher::
OnGpuInfoUpdateOnUIThread,
base::Unretained(this)));
}
void OnGpuInfoUpdateOnUIThread() {
DCHECK_CALLED_ON_VALID_SEQUENCE(ui_sequence_checker_);
auto* manager = GpuDataManagerImpl::GetInstance();
if (!manager->IsGpuFeatureInfoAvailable()) {
return;
}
gpu_feature_info_ = manager->GetGpuFeatureInfo();
while (!pending_factory_receivers_.empty()) {
auto factory_receiver = std::move(pending_factory_receivers_.front());
pending_factory_receivers_.pop();
LaunchOnUIThread(std::move(factory_receiver));
}
}
void LaunchWhenGpuFeatureInfoIsKnownOnUIThread(
mojo::PendingReceiver<media::stable::mojom::StableVideoDecoderFactory>
receiver) {
DCHECK_CALLED_ON_VALID_SEQUENCE(ui_sequence_checker_);
if (gpu_feature_info_) {
LaunchOnUIThread(std::move(receiver));
return;
}
pending_factory_receivers_.emplace(std::move(receiver));
GpuDataManagerImpl::GetInstance()->AddObserver(this);
OnGpuInfoUpdateOnUIThread();
}
void LaunchOnUIThread(
mojo::PendingReceiver<media::stable::mojom::StableVideoDecoderFactory>
receiver) {
DCHECK_CALLED_ON_VALID_SEQUENCE(ui_sequence_checker_);
if (gpu_feature_info_
->status_values[gpu::GPU_FEATURE_TYPE_ACCELERATED_VIDEO_DECODE] !=
gpu::kGpuFeatureStatusEnabled) {
return;
}
mojo::Remote<media::stable::mojom::StableVideoDecoderFactoryProcess>
process;
ServiceProcessHost::Launch(
process.BindNewPipeAndPassReceiver(),
ServiceProcessHost::Options().WithDisplayName("Video Decoder").Pass());
process->InitializeStableVideoDecoderFactory(*gpu_feature_info_,
std::move(receiver));
processes_.Add(std::move(process));
}
const scoped_refptr<base::SequencedTaskRunner> ui_thread_task_runner_;
const gpu::GpuPreferences gpu_preferences_;
SEQUENCE_CHECKER(ui_sequence_checker_);
// Each utility process launched by this class hosts a
// StableVideoDecoderFactoryProcess implementation which is used to broker a
// StableVideoDecoderFactory connection. The process stays alive until either
// a) the StableVideoDecoderFactoryProcess connection is lost, or b) it
// crashes. Case (a) will typically happen when the client that uses the
// StableVideoDecoderFactory connection closes its endpoint (e.g., a renderer
// process dies). In that situation, the utility process should detect that
// the StableVideoDecoderFactory connection got lost and subsequently close
// the StableVideoDecoderFactoryProcess connection which should cause the
// termination of the process. We need to keep the
// StableVideoDecoderFactoryProcess connection endpoint in a RemoteSet to keep
// the process alive until the StableVideoDecoderFactory connection is lost.
mojo::RemoteSet<media::stable::mojom::StableVideoDecoderFactoryProcess>
processes_ GUARDED_BY_CONTEXT(ui_sequence_checker_);
std::optional<gpu::GpuFeatureInfo> gpu_feature_info_
GUARDED_BY_CONTEXT(ui_sequence_checker_);
// This member holds onto any requests for a StableVideoDecoderFactory until
// the gpu::GpuFeatureInfo is known.
base::queue<
mojo::PendingReceiver<media::stable::mojom::StableVideoDecoderFactory>>
pending_factory_receivers_ GUARDED_BY_CONTEXT(ui_sequence_checker_);
};
} // namespace
#endif // BUILDFLAG(ALLOW_HOSTING_OOP_VIDEO_DECODER)
void LaunchStableVideoDecoderFactory(
mojo::PendingReceiver<media::stable::mojom::StableVideoDecoderFactory>
receiver) {
#if BUILDFLAG(ALLOW_HOSTING_OOP_VIDEO_DECODER)
StableVideoDecoderFactoryProcessLauncher::Instance()
.LaunchWhenGpuFeatureInfoIsKnown(std::move(receiver));
#elif BUILDFLAG(IS_CHROMEOS_LACROS)
// For LaCrOS, we need to use crosapi to establish a
// StableVideoDecoderFactory connection to ash-chrome.
auto* lacros_service = chromeos::LacrosService::Get();
if (lacros_service &&
lacros_service
->IsSupported<media::stable::mojom::StableVideoDecoderFactory>()) {
lacros_service->BindStableVideoDecoderFactory(std::move(receiver));
}
#endif
}
} // namespace content