media/mojo/interfaces/key_system_support.mojom

// 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.mojom;

import "media/mojo/interfaces/content_decryption_module.mojom";
import "media/mojo/interfaces/media_types.mojom";

// TODO(xhwang): Use "set" instead of "array" if supported by mojom.
// TODO(crbug.com/796725) Find a way to include profiles and levels for
// supported codecs.
struct KeySystemCapability {
  // Software secure codecs and encryption schemes supported by the CDM.
  array<VideoCodec> video_codecs;
  bool supports_vp9_profile2;
  array<EncryptionMode> encryption_schemes;

  // Hardware secure codecs and encryption schemes supported by the CDM,
  // directly or indirectly through CdmProxy.
  array<VideoCodec> hw_secure_video_codecs;
  array<EncryptionMode> hw_secure_encryption_schemes;

  // Session types supported in software secure mode if no
  // |hw_secure_video_codecs| is supported, or in both modes otherwise.
  array<CdmSessionType> session_types;
};

interface KeySystemSupport {
  // Query to determine if the browser supports the |key_system|. If supported,
  // |key_system_capability| is non-null indicating supported capability.
  // KeySystemSupport implementation is in the browser process, as it maintains
  // the list of registered CDMs, and hardware secure support check also needs
  // to run in the browser process because the render process is sandboxed.
  // KeySystemSupport clients run in the renderer process.
  // TODO(crbug.com/853264): Make this an async call.
  [Sync]
  IsKeySystemSupported(string key_system)
    => (bool is_supported, KeySystemCapability? key_system_capability);
};