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// Copyright 2017 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_KEY_SYSTEM_SUPPORT_IMPL_H_
#define CONTENT_BROWSER_MEDIA_KEY_SYSTEM_SUPPORT_IMPL_H_
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include "base/callback_list.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/media/cdm_registry_impl.h"
#include "content/common/content_export.h"
#include "content/public/browser/document_user_data.h"
#include "content/public/browser/permission_controller.h"
#include "content/public/browser/render_frame_host.h"
#include "media/mojo/mojom/key_system_support.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/permissions/permission_status.mojom.h"
#include "third_party/blink/public/mojom/renderer_preference_watcher.mojom.h"
namespace content {
// A class living in the browser process per render frame handling all
// KeySystemSupport requests for that frame.
class CONTENT_EXPORT KeySystemSupportImpl final
: public DocumentUserData<KeySystemSupportImpl>,
public blink::mojom::RendererPreferenceWatcher,
public media::mojom::KeySystemSupport {
public:
~KeySystemSupportImpl() final;
KeySystemSupportImpl(const KeySystemSupportImpl&) = delete;
KeySystemSupportImpl& operator=(const KeySystemSupportImpl&) = delete;
// `get_support_cb_for_testing` is used to get support update for testing.
// If null, we'll use `CdmRegistryImpl` to get the update.
using GetKeySystemCapabilitiesUpdateCB =
base::RepeatingCallback<void(bool allow_hw_secure_capability_check,
KeySystemCapabilitiesUpdateCB)>;
void SetGetKeySystemCapabilitiesUpdateCbForTesting(
GetKeySystemCapabilitiesUpdateCB get_support_cb_for_testing);
// Binds the `receiver` to `this`.
void Bind(mojo::PendingReceiver<media::mojom::KeySystemSupport> receiver);
// media::mojom::KeySystemSupport implementation.
void SetObserver(mojo::PendingRemote<media::mojom::KeySystemSupportObserver>
observer) final;
private:
friend class KeySystemSupportImplTest;
friend class DocumentUserData<KeySystemSupportImpl>;
explicit KeySystemSupportImpl(RenderFrameHost* rfh);
DOCUMENT_USER_DATA_KEY_DECL();
// Initializes permissions values `is_protected_content_allowed_` and
// `is_protected_identifier_allowed_`.
void InitializePermissions();
// Sets up permission listeners for updates.
void SetUpPermissionListeners();
// Initializes `is_protected_identifier_allowed_` with `status`.
void OnProtectedMediaIdentifierPermissionInitialized(
blink::mojom::PermissionStatus status);
// Updates `is_protected_identifier_allowed_` with `status`.
void OnProtectedMediaIdentifierPermissionUpdated(
blink::mojom::PermissionStatus status);
// blink::mojom::RendererPreferenceWatcher.
void NotifyUpdate(const blink::RendererPreferences& new_prefs) override;
// Returns whether HW secure capability check is allow based on site settings.
bool allow_hw_secure_capability_check() const;
void ObserveKeySystemCapabilities();
void OnKeySystemCapabilitiesUpdated(
KeySystemCapabilities key_system_capabilities);
GetKeySystemCapabilitiesUpdateCB get_support_cb_for_testing_;
mojo::Receiver<KeySystemSupport> key_system_support_receiver_{this};
mojo::Remote<media::mojom::KeySystemSupportObserver> observer_remote_;
std::optional<KeySystemCapabilities> key_system_capabilities_;
// Callback subscription to keep the callback alive in the CdmRegistry.
base::CallbackListSubscription cb_subscription_;
bool is_protected_content_allowed_ = false;
bool is_protected_identifier_allowed_ = false;
bool are_permissions_initialized_ = false;
mojo::Receiver<blink::mojom::RendererPreferenceWatcher>
preference_watcher_receiver_{this};
PermissionController::SubscriptionId permission_subscription_id_;
base::WeakPtrFactory<KeySystemSupportImpl> weak_ptr_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_KEY_SYSTEM_SUPPORT_IMPL_H_
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