media/mojo/mojom/renderer_extensions.mojom

// Copyright 2019 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.mojom;

import "media/mojo/mojom/media_types.mojom";
import "mojo/public/mojom/base/time.mojom";
import "mojo/public/mojom/base/unguessable_token.mojom";
import "ui/gfx/geometry/mojom/geometry.mojom";

// Extension of the mojo::RendererClient communication layer for HLS and Android
// software rendering fallback paths.
// This allows the Browser side to call back into the Renderer side. Concretely,
// the MediaPlayerRenderer uses these methods to propagate events it raises to
// the MediaPlayerRendererClient, which lives in the Renderer process.
interface MediaPlayerRendererClientExtension {
  // Called when the first time the metadata is updated, and whenever the
  // metadata changes.
  OnVideoSizeChange(gfx.mojom.Size size);
  OnDurationChange(mojo_base.mojom.TimeDelta duration);
};

// Extension of the mojo::Renderer communication layer for HLS and Android
// software rendering fallback paths.
// This allows the Renderer side to call into the Browser side.
// Concretely, the MediaPlayerRendererClient uses these methods to send commands
// to MediaPlayerRenderer, which lives in the Browser process.
interface MediaPlayerRendererExtension {
  // Registers a new request in the ScopedSurfaceRequestManager, and returns
  // its token.
  // Called once, during media::Renderer initialization, as part of
  // StreamTexture's set-up.
  InitiateScopedSurfaceRequest()
      => (mojo_base.mojom.UnguessableToken request_token);
};

// Extension of the mojo::RendererClient communication layer for media flinging,
// a.k.a RemotePlayback, when playing media on a remote Cast device.
// This allows the Browser side to call back into the Renderer side.
// Concretely, the FlingingRenderer uses these methods to propagate events it
// raises to the FlingingRendererClient, which lives in the Renderer process.
interface FlingingRendererClientExtension {
  // Called when the play state of a casted device goes out of sync with WMPI's
  // play state (e.g. when another phone play/pauses a cast device on the same
  // network).
  OnRemotePlayStateChange(MediaStatusState state);
};

[EnableIf=is_win]
// Extension of the mojo::Renderer communication layer for MediaFoundation-based
// Renderer.
// This allows the MediaFoundationRendererClient in the render process to call
// into the MediaFoundationRenderer in the MediaFoundationService (utility/LPAC)
// process.
// Please refer to media/renderers/win/media_foundation_renderer_extension.h
// for its C++ interface equivalence.
interface MediaFoundationRendererExtension {
  // Enables Direct Composition video rendering and gets the token associated
  // with the Direct Composition surface handle, which can be retrieved later
  // in the GPU process using the token. Returns a null token on failures.
  GetDCOMPSurface() => (mojo_base.mojom.UnguessableToken? token);

  // Notifies whether video is enabled.
  SetVideoStreamEnabled(bool enabled);

  // Notifies of output composition parameters. It might fail if
  // MediaFoundationRenderer runs into error while setting the `rect`
  // information onto MFMediaEngine. It it fails, the video will be displayed
  // incorrectly (e.g. a smaller video rendered at the corner of the video
  // output area.). In case of failure, caller should not use the `rect` for
  // further operations.
  SetOutputRect(gfx.mojom.Rect rect) => (bool success);
};