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// Copyright 2015 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_MEDIA_SESSION_PLAYER_OBSERVER_H_
#define CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_PLAYER_OBSERVER_H_
#include <optional>
#include "base/functional/callback.h"
#include "base/time/time.h"
#include "media/base/picture_in_picture_events_info.h"
namespace media {
enum class MediaContentType;
}
namespace media_session {
struct MediaPosition;
} // namespace media_session
namespace content {
class RenderFrameHost;
class MediaSessionPlayerObserver {
public:
MediaSessionPlayerObserver() = default;
virtual ~MediaSessionPlayerObserver() = default;
// The given |player_id| has been suspended by the MediaSession.
virtual void OnSuspend(int player_id) = 0;
// The given |player_id| has been resumed by the MediaSession.
virtual void OnResume(int player_id) = 0;
// The given |player_id| has been seeked forward by the MediaSession.
virtual void OnSeekForward(int player_id, base::TimeDelta seek_time) = 0;
// The given |player_id| has been seeked backward by the MediaSession.
virtual void OnSeekBackward(int player_id, base::TimeDelta seek_time) = 0;
// The given |player_id| has been seeked to by the MediaSession.
virtual void OnSeekTo(int player_id, base::TimeDelta seek_time) = 0;
// The given |player_id| has been set a new volume multiplier by
// the MediaSession.
virtual void OnSetVolumeMultiplier(int player_id,
double volume_multiplier) = 0;
// The given |player_id| has been requested picture-in-picture.
virtual void OnEnterPictureInPicture(int player_id) = 0;
// The given |player_id| has been requested to route audio output to the
// specified audio device.
virtual void OnSetAudioSinkId(int player_id,
const std::string& raw_device_id) = 0;
// The given |player_id| has been requested to mute or unmute.
virtual void OnSetMute(int player_id, bool mute) = 0;
// The given |player_id| has been requested to start Media Remoting.
virtual void OnRequestMediaRemoting(int player_id) = 0;
// `RequestVisibilityCallback` is used to enable computing video visibility
// on-demand. The callback is passed to the MediaVideoVisibilityTracker, where
// the on-demand visibility computation will take place.
//
// The boolean parameter represents whether a video element meets a given
// visibility threshold. This threshold (`kVisibilityThreshold`) is defined by
// the HTMLVideoElement.
using RequestVisibilityCallback = base::OnceCallback<void(bool)>;
// The given |player_id| has been requested to report its video visibility.
virtual void OnRequestVisibility(
int player_id,
RequestVisibilityCallback request_visibility_callback) = 0;
// Returns the position for |player_id|.
virtual std::optional<media_session::MediaPosition> GetPosition(
int player_id) const = 0;
// Returns if picture-in-picture is available for |player_id|.
virtual bool IsPictureInPictureAvailable(int player_id) const = 0;
// Returns if player's |player_id| video is sufficiently visible.
virtual bool HasSufficientlyVisibleVideo(int player_id) const = 0;
// Returns true if the |player_id| has audio tracks.
virtual bool HasAudio(int player_id) const = 0;
// Returns true if the |player_id| has video tracks.
virtual bool HasVideo(int player_id) const = 0;
// Returns true if `player_id` is paused.
virtual bool IsPaused(int player_id) const = 0;
// Returns the id of the audio output device used by |player_id|. Returns the
// empty string if unavailable.
virtual std::string GetAudioOutputSinkId(int player_id) const = 0;
// Returns true if the |player_id| supports audio output device switching.
virtual bool SupportsAudioOutputDeviceSwitching(int player_id) const = 0;
virtual media::MediaContentType GetMediaContentType() const = 0;
// Called when the auto picture in picture information has changed.
virtual void OnAutoPictureInPictureInfoChanged(
int player_id,
const media::PictureInPictureEventsInfo::AutoPipInfo&
auto_picture_in_picture_info) = 0;
// Returns the RenderFrameHost this player observer belongs to. Returns
// nullptr if unavailable.
virtual RenderFrameHost* render_frame_host() const = 0;
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_PLAYER_OBSERVER_H_
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