gecko-dev/dom/media/gmp/GMPServiceChild.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef GMPServiceChild_h_
#define GMPServiceChild_h_

#include "GMPService.h"
#include "base/process.h"
#include "mozilla/ipc/Transport.h"
#include "mozilla/gmp/PGMPServiceChild.h"
#include "nsRefPtrHashtable.h"
#include "mozilla/dom/ContentChild.h"

namespace mozilla {
namespace gmp {

class GMPContentParent;
class GMPServiceChild;

class GeckoMediaPluginServiceChild : public GeckoMediaPluginService
{
  friend class GMPServiceChild;

public:
  static already_AddRefed<GeckoMediaPluginServiceChild> GetSingleton();

  NS_IMETHOD HasPluginForAPI(const nsACString& aAPI,
                             nsTArray<nsCString>* aTags,
                             bool *aRetVal) override;
  NS_IMETHOD GetNodeId(const nsAString& aOrigin,
                       const nsAString& aTopLevelOrigin,
                       const nsAString& aGMPName,
                       UniquePtr<GetNodeIdCallback>&& aCallback) override;

  NS_DECL_NSIOBSERVER

  void SetServiceChild(UniquePtr<GMPServiceChild>&& aServiceChild);

  void RemoveGMPContentParent(GMPContentParent* aGMPContentParent);

  static void UpdateGMPCapabilities(nsTArray<mozilla::dom::GMPCapabilityData>&& aCapabilities);

  void BeginShutdown();

protected:
  void InitializePlugins(AbstractThread*) override
  {
    // Nothing to do here.
  }

  virtual RefPtr<GetGMPContentParentPromise> GetContentParent(
    GMPCrashHelper* aHelper,
    const nsACString& aNodeIdString,
    const nsCString& aAPI,
    const nsTArray<nsCString>& aTags) override;

  RefPtr<GetGMPContentParentPromise> GetContentParent(
    GMPCrashHelper* aHelper,
    const NodeId& aNodeId,
    const nsCString& aAPI,
    const nsTArray<nsCString>& aTags) override;

private:
  friend class OpenPGMPServiceChild;

  typedef MozPromise<GMPServiceChild*, nsresult, /* IsExclusive = */ true> GetServiceChildPromise;
  RefPtr<GetServiceChildPromise> GetServiceChild();

  nsTArray<MozPromiseHolder<GetServiceChildPromise>> mGetServiceChildPromises;
  UniquePtr<GMPServiceChild> mServiceChild;
};

class GMPServiceChild : public PGMPServiceChild
{
public:
  explicit GMPServiceChild();
  virtual ~GMPServiceChild();

  already_AddRefed<GMPContentParent> GetBridgedGMPContentParent(ProcessId aOtherPid,
                                                                ipc::Endpoint<PGMPContentParent>&& endpoint);

  void RemoveGMPContentParent(GMPContentParent* aGMPContentParent);

  void GetAlreadyBridgedTo(nsTArray<ProcessId>& aAlreadyBridgedTo);

  static bool Create(Endpoint<PGMPServiceChild>&& aGMPService);

  ipc::IPCResult RecvBeginShutdown() override;

  bool HaveContentParents() const;

private:
  nsRefPtrHashtable<nsUint64HashKey, GMPContentParent> mContentParents;
};

} // namespace gmp
} // namespace mozilla

#endif // GMPServiceChild_h_