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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_WORKLET_MESSAGING_PROXY_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_WORKLET_MESSAGING_PROXY_H_
#include <memory>
#include <optional>
#include "base/time/time.h"
#include "third_party/blink/renderer/core/workers/threaded_worklet_messaging_proxy.h"
#include "third_party/blink/renderer/modules/modules_export.h"
namespace blink {
class AudioWorklet;
class AudioWorkletHandler;
class CrossThreadAudioParamInfo;
class CrossThreadAudioWorkletProcessorInfo;
class ExecutionContext;
class MessagePortChannel;
class SerializedScriptValue;
class WorkerThread;
// AudioWorkletMessagingProxy is a main thread interface for
// AudioWorkletGlobalScope. The proxy communicates with the associated global
// scope via AudioWorkletObjectProxy.
class MODULES_EXPORT AudioWorkletMessagingProxy final
: public ThreadedWorkletMessagingProxy {
public:
AudioWorkletMessagingProxy(ExecutionContext*, AudioWorklet*);
// Since the creation of AudioWorkletProcessor needs to be done in the
// different thread, this method is a wrapper for cross-thread task posting.
void CreateProcessor(scoped_refptr<AudioWorkletHandler>,
MessagePortChannel,
scoped_refptr<SerializedScriptValue> node_options);
// Invokes AudioWorkletGlobalScope to create an instance of
// AudioWorkletProcessor.
void CreateProcessorOnRenderingThread(
WorkerThread*,
scoped_refptr<AudioWorkletHandler>,
const String& name,
MessagePortChannel,
scoped_refptr<SerializedScriptValue> node_options);
// Invoked by AudioWorkletObjectProxy on AudioWorkletThread to fetch the
// information from AudioWorkletGlobalScope to AudioWorkletMessagingProxy
// after the script code evaluation. It copies the information about newly
// added AudioWorkletProcessor since the previous synchronization. (e.g.
// processor name and AudioParam list)
void SynchronizeWorkletProcessorInfoList(
std::unique_ptr<Vector<CrossThreadAudioWorkletProcessorInfo>>);
// Returns true if the processor with given name is registered in
// AudioWorkletGlobalScope.
bool IsProcessorRegistered(const String& name) const;
Vector<CrossThreadAudioParamInfo> GetParamInfoListForProcessor(
const String& name) const;
// Returns a WorkerThread object backs the AudioWorkletThread instance.
WorkerThread* GetBackingWorkerThread();
// Create a Worklet backing thread based on constraints:
// If realtime_buffer_duration is not provided:
// 1. OfflineAudioContext: BACKGROUND priority thread.
// Otherwise:
// 2. AudioContext && outermost main frame: RT priority thread;
// 3. AudioContext && sub frame: DISPLAY priority thread.
static std::unique_ptr<WorkerThread> CreateWorkletThreadWithConstraints(
WorkerReportingProxy&,
std::optional<base::TimeDelta> realtime_buffer_duration,
const bool is_outermost_main_frame);
void Trace(Visitor*) const override;
private:
// Implements ThreadedWorkletMessagingProxy.
std::unique_ptr<ThreadedWorkletObjectProxy> CreateObjectProxy(
ThreadedWorkletMessagingProxy*,
ParentExecutionContextTaskRunners*,
scoped_refptr<base::SingleThreadTaskRunner>
parent_agent_group_task_runner) override;
std::unique_ptr<WorkerThread> CreateWorkerThread() override;
// Each entry consists of processor name and associated AudioParam list.
HashMap<String, Vector<CrossThreadAudioParamInfo>> processor_info_map_;
Member<AudioWorklet> worklet_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_WORKLET_MESSAGING_PROXY_H_
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