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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_MEDIA_INTERNALS_AUDIO_FOCUS_HELPER_H_
#define CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_AUDIO_FOCUS_HELPER_H_
#include <map>
#include <string_view>
#include "base/values.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/media_session/public/mojom/audio_focus.mojom.h"
namespace content {
// MediaInternalsAudioFocusHelper manages communication with the media session
// helper to populate the "audio focus" tab.
class MediaInternalsAudioFocusHelper
: public media_session::mojom::AudioFocusObserver {
public:
MediaInternalsAudioFocusHelper();
MediaInternalsAudioFocusHelper(const MediaInternalsAudioFocusHelper&) =
delete;
MediaInternalsAudioFocusHelper& operator=(
const MediaInternalsAudioFocusHelper&) = delete;
~MediaInternalsAudioFocusHelper() override;
// Sends all audio focus information to media internals.
void SendAudioFocusState();
// AudioFocusObserver implementation.
void OnFocusGained(
media_session::mojom::AudioFocusRequestStatePtr session) override;
void OnFocusLost(
media_session::mojom::AudioFocusRequestStatePtr session) override;
void OnRequestIdReleased(const base::UnguessableToken&) override {}
// Sets whether we should listen to audio focus events.
void SetEnabled(bool enabled);
private:
bool EnsureServiceConnection();
void OnMojoError();
void OnDebugMojoError();
// Called when we receive the list of audio focus requests to display.
void DidGetAudioFocusRequestList(
std::vector<media_session::mojom::AudioFocusRequestStatePtr>);
// Called when we receive audio focus debug info to display for a single
// audio focus request.
void DidGetAudioFocusDebugInfo(
const std::string& id,
media_session::mojom::MediaSessionDebugInfoPtr info);
void SerializeAndSendUpdate(std::string_view function,
const base::Value::Dict& value);
// Build the name of the request to display and inject values from |state|.
std::string BuildNameString(
const media_session::mojom::AudioFocusRequestStatePtr& state,
const std::string& provided_name) const;
// Inject |state| values to display in the state information.
std::string BuildStateString(
const media_session::mojom::AudioFocusRequestStatePtr& state,
const std::string& provided_state) const;
// Holds a remote to the media session service and it's debug interface.
mojo::Remote<media_session::mojom::AudioFocusManager> audio_focus_;
mojo::Remote<media_session::mojom::AudioFocusManagerDebug> audio_focus_debug_;
// Must only be accessed on the UI thread.
base::Value::Dict audio_focus_data_;
std::map<std::string, media_session::mojom::AudioFocusRequestStatePtr>
request_state_;
bool enabled_ = false;
mojo::Receiver<media_session::mojom::AudioFocusObserver> receiver_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_AUDIO_FOCUS_HELPER_H_
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