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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_LOOPBACK_STREAM_BROKER_H_
#define CONTENT_BROWSER_MEDIA_AUDIO_LOOPBACK_STREAM_BROKER_H_
#include <cstdint>
#include <optional>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/media/audio_muting_session.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_data_pipe.mojom.h"
#include "media/mojo/mojom/audio_input_stream.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace media {
namespace mojom {
class AudioStreamFactory;
}
} // namespace media
namespace content {
// AudioLoopbackStreamBroker is used to broker a connection between a client
// (typically renderer) and the audio service. It is operated on the UI thread.
class CONTENT_EXPORT AudioLoopbackStreamBroker final
: public AudioStreamBroker,
public media::mojom::AudioInputStreamObserver,
public AudioStreamBroker::LoopbackSink {
public:
AudioLoopbackStreamBroker(
int render_process_id,
int render_frame_id,
AudioStreamBroker::LoopbackSource* source,
const media::AudioParameters& params,
uint32_t shared_memory_count,
bool mute_source,
AudioStreamBroker::DeleterCallback deleter,
mojo::PendingRemote<blink::mojom::RendererAudioInputStreamFactoryClient>
renderer_factory_client);
AudioLoopbackStreamBroker(const AudioLoopbackStreamBroker&) = delete;
AudioLoopbackStreamBroker& operator=(const AudioLoopbackStreamBroker&) =
delete;
~AudioLoopbackStreamBroker() final;
// Creates the stream.
void CreateStream(media::mojom::AudioStreamFactory* factory) final;
// media::AudioInputStreamObserver implementation.
void DidStartRecording() final;
// AudioStreamBroker::LoopbackSink
void OnSourceGone() final;
private:
void StreamCreated(mojo::PendingRemote<media::mojom::AudioInputStream> stream,
media::mojom::ReadWriteAudioDataPipePtr data_pipe);
void Cleanup();
// Owner of the output streams to be looped back.
raw_ptr<AudioStreamBroker::LoopbackSource> source_;
const media::AudioParameters params_;
const uint32_t shared_memory_count_;
DeleterCallback deleter_;
// Constructed only if the loopback source playback should be muted while the
// loopback stream is running.
std::optional<AudioMutingSession> muter_;
mojo::Remote<blink::mojom::RendererAudioInputStreamFactoryClient>
renderer_factory_client_;
mojo::Receiver<AudioInputStreamObserver> observer_receiver_{this};
mojo::PendingReceiver<media::mojom::AudioInputStreamClient> client_receiver_;
base::WeakPtrFactory<AudioLoopbackStreamBroker> weak_ptr_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_AUDIO_LOOPBACK_STREAM_BROKER_H_
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