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// Copyright 2020 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 "third_party/blink/renderer/modules/webaudio/semi_realtime_audio_worklet_thread.h"
#include "base/feature_list.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/renderer/modules/webaudio/audio_worklet_global_scope.h"
#include "third_party/blink/renderer/platform/instrumentation/tracing/trace_event.h"
namespace blink {
template class WorkletThreadHolder<SemiRealtimeAudioWorkletThread>;
int SemiRealtimeAudioWorkletThread::s_ref_count_ = 0;
SemiRealtimeAudioWorkletThread::SemiRealtimeAudioWorkletThread(
WorkerReportingProxy& worker_reporting_proxy)
: WorkerThread(worker_reporting_proxy) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("audio-worklet"),
"SemiRealtimeAudioWorklet()");
DCHECK(IsMainThread());
ThreadCreationParams params =
ThreadCreationParams(ThreadType::kSemiRealtimeAudioWorkletThread);
// Use a higher priority thread only when it is allowed by Finch.
if (base::FeatureList::IsEnabled(
features::kAudioWorkletThreadRealtimePriority)) {
// TODO(crbug.com/1022888): The worklet thread priority is always NORMAL on
// Linux and Chrome OS regardless of this thread priority setting.
params.thread_priority = base::ThreadPriority::DISPLAY;
} else {
params.thread_priority = base::ThreadPriority::NORMAL;
}
if (++s_ref_count_ == 1)
EnsureSharedBackingThread(params);
}
SemiRealtimeAudioWorkletThread::~SemiRealtimeAudioWorkletThread() {
DCHECK(IsMainThread());
if (--s_ref_count_ == 0)
ClearSharedBackingThread();
}
WorkerBackingThread& SemiRealtimeAudioWorkletThread::GetWorkerBackingThread() {
return *WorkletThreadHolder<SemiRealtimeAudioWorkletThread>::GetInstance()
->GetThread();
}
void SemiRealtimeAudioWorkletThread::EnsureSharedBackingThread(
const ThreadCreationParams& params) {
DCHECK(IsMainThread());
WorkletThreadHolder<SemiRealtimeAudioWorkletThread>::EnsureInstance(params);
}
void SemiRealtimeAudioWorkletThread::ClearSharedBackingThread() {
DCHECK(IsMainThread());
CHECK_EQ(s_ref_count_, 0);
WorkletThreadHolder<SemiRealtimeAudioWorkletThread>::ClearInstance();
}
WorkerOrWorkletGlobalScope*
SemiRealtimeAudioWorkletThread::CreateWorkerGlobalScope(
std::unique_ptr<GlobalScopeCreationParams> creation_params) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("audio-worklet"),
"SemiRealtimeAudioWorkletThread::CreateWorkerGlobalScope");
return MakeGarbageCollected<AudioWorkletGlobalScope>(
std::move(creation_params), this);
}
} // namespace blink
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