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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 CONTENT_BROWSER_MEDIA_SESSION_AUDIO_FOCUS_DELEGATE_H_
#define CONTENT_BROWSER_MEDIA_SESSION_AUDIO_FOCUS_DELEGATE_H_
#include <optional>
#include "services/media_session/public/mojom/audio_focus.mojom.h"
namespace base {
class UnguessableToken;
} // namespace base
namespace content {
class MediaSessionImpl;
// AudioFocusDelegate is an interface abstracting audio focus handling for the
// MediaSession class.
class AudioFocusDelegate {
public:
// Factory method returning an implementation of AudioFocusDelegate.
static std::unique_ptr<AudioFocusDelegate> Create(
MediaSessionImpl* media_session);
virtual ~AudioFocusDelegate() = default;
enum class AudioFocusResult {
kSuccess,
kFailed,
kDelayed,
};
virtual AudioFocusResult RequestAudioFocus(
media_session::mojom::AudioFocusType audio_focus_type) = 0;
virtual void AbandonAudioFocus() = 0;
// Retrieves the current |AudioFocusType| for the associated |MediaSession|.
virtual std::optional<media_session::mojom::AudioFocusType>
GetCurrentFocusType() const = 0;
// |MediaSession| should call this when it's state changes.
virtual void MediaSessionInfoChanged(
const media_session::mojom::MediaSessionInfoPtr&) = 0;
// Retrieves the current request ID for the associated |MediaSession|.
virtual const base::UnguessableToken& request_id() const = 0;
// Inform the AudioFocusManager that this request ID will no longer be used.
virtual void ReleaseRequestId() = 0;
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_SESSION_AUDIO_FOCUS_DELEGATE_H_
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