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// Copyright 2017 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.
#ifndef MEDIA_MOJO_SERVICES_MOJO_AUDIO_OUTPUT_STREAM_PROVIDER_H_
#define MEDIA_MOJO_SERVICES_MOJO_AUDIO_OUTPUT_STREAM_PROVIDER_H_
#include <memory>
#include <string>
#include "base/sequence_checker.h"
#include "media/audio/audio_output_delegate.h"
#include "media/mojo/mojom/audio_output_stream.mojom.h"
#include "media/mojo/services/media_mojo_export.h"
#include "media/mojo/services/mojo_audio_output_stream.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 {
// Provides a single AudioOutput, given the audio parameters to use.
class MEDIA_MOJO_EXPORT MojoAudioOutputStreamProvider
: public mojom::AudioOutputStreamProvider {
public:
using CreateDelegateCallback =
base::OnceCallback<std::unique_ptr<AudioOutputDelegate>(
const AudioParameters& params,
mojo::PendingRemote<mojom::AudioOutputStreamObserver>,
AudioOutputDelegate::EventHandler*)>;
using DeleterCallback = base::OnceCallback<void(AudioOutputStreamProvider*)>;
// |create_delegate_callback| is used to obtain an AudioOutputDelegate for the
// AudioOutput when it's initialized and |deleter_callback| is called when
// this class should be removed (stream ended/error). |deleter_callback| is
// required to destroy |this| synchronously.
MojoAudioOutputStreamProvider(
mojo::PendingReceiver<mojom::AudioOutputStreamProvider> pending_receiver,
CreateDelegateCallback create_delegate_callback,
DeleterCallback deleter_callback,
std::unique_ptr<mojom::AudioOutputStreamObserver> observer);
MojoAudioOutputStreamProvider(const MojoAudioOutputStreamProvider&) = delete;
MojoAudioOutputStreamProvider& operator=(
const MojoAudioOutputStreamProvider&) = delete;
~MojoAudioOutputStreamProvider() override;
private:
// mojom::AudioOutputStreamProvider implementation.
void Acquire(const AudioParameters& params,
mojo::PendingRemote<mojom::AudioOutputStreamProviderClient>
provider_client) override;
// Called when |audio_output_| had an error.
void CleanUp(bool had_error);
// Closes mojo connections, reports a bad message, and self-destructs.
void BadMessage(const std::string& error);
SEQUENCE_CHECKER(sequence_checker_);
mojo::Receiver<AudioOutputStreamProvider> receiver_;
CreateDelegateCallback create_delegate_callback_;
DeleterCallback deleter_callback_;
std::unique_ptr<mojom::AudioOutputStreamObserver> observer_;
mojo::Receiver<mojom::AudioOutputStreamObserver> observer_receiver_;
absl::optional<MojoAudioOutputStream> audio_output_;
mojo::Remote<mojom::AudioOutputStreamProviderClient> provider_client_;
};
} // namespace media
#endif // MEDIA_MOJO_SERVICES_MOJO_AUDIO_OUTPUT_STREAM_PROVIDER_H_
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