content/public/renderer/key_system_support.h

// 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_PUBLIC_RENDERER_KEY_SYSTEM_SUPPORT_H_
#define CONTENT_PUBLIC_RENDERER_KEY_SYSTEM_SUPPORT_H_

#include <string>

#include "base/containers/flat_map.h"
#include "base/functional/callback.h"
#include "content/common/content_export.h"
#include "content/public/renderer/render_frame.h"
#include "media/base/key_system_capability.h"
#include "media/base/key_systems_support_registration.h"

namespace content {

using KeySystemCapabilities =
    base::flat_map<std::string, media::KeySystemCapability>;
using KeySystemSupportCB = base::RepeatingCallback<void(KeySystemCapabilities)>;

// Observes key system support updates. The callback `cb` will be called with
// the current key system support, then called every time the key system support
// changes.
CONTENT_EXPORT std::unique_ptr<media::KeySystemSupportRegistration>
ObserveKeySystemSupportUpdate(content::RenderFrame* render_frame,
                              media::KeySystemSupportCB cb);

}  // namespace content

#endif  // CONTENT_PUBLIC_RENDERER_KEY_SYSTEM_SUPPORT_H_