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// 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.
#ifndef CONTENT_BROWSER_MEDIA_AUDIO_OUTPUT_STREAM_BROKER_H_
#define CONTENT_BROWSER_MEDIA_AUDIO_OUTPUT_STREAM_BROKER_H_
#include <string>
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "base/unguessable_token.h"
#include "content/browser/renderer_host/media/audio_output_stream_observer_impl.h"
#include "content/browser/renderer_host/media/preferred_audio_output_device_manager.h"
#include "content/common/content_export.h"
#include "content/public/browser/audio_stream_broker.h"
#include "media/base/audio_parameters.h"
#include "media/mojo/mojom/audio_output_stream.mojom.h"
#include "media/mojo/mojom/audio_stream_factory.mojom.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace content {
// AudioOutputStreamBroker is used to broker a connection between a client
// (typically renderer) and the audio service. It also sets up all objects
// used for monitoring the stream.
class CONTENT_EXPORT AudioOutputStreamBroker final
: public AudioStreamBroker,
public AudioOutputDeviceSwitcher {
public:
AudioOutputStreamBroker(
int render_process_id,
int render_frame_id,
const GlobalRenderFrameHostToken& main_frame_token,
int stream_id,
const std::string& output_device_id,
const media::AudioParameters& params,
const base::UnguessableToken& group_id,
DeleterCallback deleter,
mojo::PendingRemote<media::mojom::AudioOutputStreamProviderClient>
client);
AudioOutputStreamBroker(const AudioOutputStreamBroker&) = delete;
AudioOutputStreamBroker& operator=(const AudioOutputStreamBroker&) = delete;
~AudioOutputStreamBroker() final;
// Creates the stream.
void CreateStream(media::mojom::AudioStreamFactory* factory) final;
// AudioOutputDeviceSwitcher implementation.
void SwitchAudioOutputDeviceId(const std::string& device_id) final;
bool IsSwitchableStreamCreatedForTesting() const {
return device_switch_interface_.is_bound();
}
void SetDeviceSwichInterfaceForTesting(
mojo::Remote<media::mojom::DeviceSwitchInterface>
device_switch_interface) {
device_switch_interface_ = std::move(device_switch_interface);
}
private:
using DisconnectReason =
media::mojom::AudioOutputStreamObserver::DisconnectReason;
void StreamCreated(
mojo::PendingRemote<media::mojom::AudioOutputStream> stream,
media::mojom::ReadWriteAudioDataPipePtr data_pipe);
void ObserverBindingLost(uint32_t reason, const std::string& description);
void Cleanup(DisconnectReason reason);
bool AwaitingCreated() const;
SEQUENCE_CHECKER(owning_sequence_);
const GlobalRenderFrameHostToken main_frame_token_;
std::string output_device_id_;
const media::AudioParameters params_;
const base::UnguessableToken group_id_;
// Set while CreateStream() has been called, but not StreamCreated().
base::TimeTicks stream_creation_start_time_;
DeleterCallback deleter_;
mojo::Remote<media::mojom::AudioOutputStreamProviderClient> client_;
AudioOutputStreamObserverImpl observer_;
mojo::AssociatedReceiver<media::mojom::AudioOutputStreamObserver>
observer_receiver_;
mojo::Remote<media::mojom::DeviceSwitchInterface> device_switch_interface_;
DisconnectReason disconnect_reason_ = DisconnectReason::kDocumentDestroyed;
base::WeakPtrFactory<AudioOutputStreamBroker> weak_ptr_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_AUDIO_OUTPUT_STREAM_BROKER_H_
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