naiveproxy/chrome/common/media_router/mojo/media_controller.mojom
2018-08-14 22:19:20 +00:00

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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.
module media_router.mojom;
import "chrome/common/media_router/mojo/media_status.mojom";
import "mojo/public/mojom/base/time.mojom";
// Interface for a controller to change the current state of a media content.
// This interface should be kept free of details specific to Media Router, so
// that it can be moved to the media namespace and be reused for other features
// in the future.
interface MediaController {
// Starts playing the media if it is paused. Is a no-op if not supported by
// the media or the media is already playing.
Play();
// Pauses the media if it is playing. Is a no-op if not supported by the media
// or the media is already paused.
Pause();
// Mutes the media if |mute| is true, and unmutes it if false. Is a no-op if
// not supported by the media.
SetMute(bool mute);
// Changes the current volume of the media, with 1 being the highest and 0
// being the lowest/no sound. Does not change the (un)muted state of the
// media. Is a no-op if not supported by the media.
SetVolume(float volume);
// Sets the current playback position. |time| must be less than or equal to
// the duration of the media. Is a no-op if the media doesn't support seeking.
Seek(mojo_base.mojom.TimeDelta time);
// Requests additional interface for commands used only for Hangouts routes.
// TODO(crbug.com/684642): Moving this method to the MediaRouteProvider
// interface (and modifying it to also take a MediaController& as input) can
// result in a simpler state for MediaController. It will be easier to reason
// about from point of view of process boundaries, and there will be
// stronger guarantees w.r.t. MediaController API contract. The tradeoff is
// code duplication (with CreateMediaRouteController API) and additional
// boilerplate code in media_router_bindings.js and in the MR extension.
// Revisit this API design after M62 when requirements for additional types
// of controllers (e.g., mirroring) are more clear.
ConnectHangoutsMediaRouteController(
HangoutsMediaRouteController& controller_request);
};
// Controller commands specific to Hangouts routes. The interface is obtained
// by calling MediaController::ConnectHangoutsMediaRouteController.
interface HangoutsMediaRouteController {
// Sets the "local present" (aka "smooth motion") mode of the Hangouts
// associated with the MediaRoute.
SetLocalPresent(bool local_present);
};