ChromiumCDMChild.h

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/* -*- 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 ChromiumCDMChild_h_

#define ChromiumCDMChild_h_

#include "content_decryption_module.h"

#include "mozilla/gmp/PChromiumCDMChild.h"

#include "SimpleMap.h"

#include "WidevineVideoFrame.h"

namespace mozilla::gmp {

class GMPContentChild;

class ChromiumCDMChild : public PChromiumCDMChild, public cdm::Host_10 {

 public:

  // Mark AddRef and Release as `final`, as they overload pure virtual

  // implementations in PChromiumCDMChild.

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ChromiumCDMChild, final);

  explicit ChromiumCDMChild(GMPContentChild* aPlugin);

  void Init(cdm::ContentDecryptionModule_10* aCDM,

            const nsACString& aStorageId);

  void TimerExpired(void* aContext);

  // cdm::Host_10 implementation

  cdm::Buffer* Allocate(uint32_t aCapacity) override;

  void SetTimer(int64_t aDelayMs, void* aContext) override;

  cdm::Time GetCurrentWallTime() override;

  void OnResolveKeyStatusPromise(uint32_t aPromiseId,

                                 cdm::KeyStatus aKeyStatus) override;

  void OnResolveNewSessionPromise(uint32_t aPromiseId, const char* aSessionId,

                                  uint32_t aSessionIdSize) override;

  void OnResolvePromise(uint32_t aPromiseId) override;

  void OnRejectPromise(uint32_t aPromiseId, cdm::Exception aException,

                       uint32_t aSystemCode, const char* aErrorMessage,

                       uint32_t aErrorMessageSize) override;

  void OnSessionMessage(const char* aSessionId, uint32_t aSessionIdSize,

                        cdm::MessageType aMessageType, const char* aMessage,

                        uint32_t aMessageSize) override;

  void OnSessionKeysChange(const char* aSessionId, uint32_t aSessionIdSize,

                           bool aHasAdditionalUsableKey,

                           const cdm::KeyInformation* aKeysInfo,

                           uint32_t aKeysInfoCount) override;

  void OnExpirationChange(const char* aSessionId, uint32_t aSessionIdSize,

                          cdm::Time aNewExpiryTime) override;

  void OnSessionClosed(const char* aSessionId,

                       uint32_t aSessionIdSize) override;

  void SendPlatformChallenge(const char* aServiceId, uint32_t aServiceIdSize,

                             const char* aChallenge,

                             uint32_t aChallengeSize) override {}

  void EnableOutputProtection(uint32_t aDesiredProtectionMask) override {}

  void QueryOutputProtectionStatus() override;

  void OnDeferredInitializationDone(cdm::StreamType aStreamType,

                                    cdm::Status aDecoderStatus) override {}

  void RequestStorageId(uint32_t aVersion) override;

  cdm::FileIO* CreateFileIO(cdm::FileIOClient* aClient) override;

  void OnInitialized(bool aSuccess) override;

  // end cdm::Host_10 specific methods

  void GiveBuffer(ipc::Shmem&& aBuffer);

 protected:

  ~ChromiumCDMChild();

  bool OnResolveNewSessionPromiseInternal(uint32_t aPromiseId,

                                          const nsACString& aSessionId);

  bool IsOnMessageLoopThread();

  void ActorDestroy(ActorDestroyReason aReason) override;

  ipc::IPCResult RecvGiveBuffer(ipc::Shmem&& aShmem) override;

  ipc::IPCResult RecvPurgeShmems() override;

  void PurgeShmems();

  ipc::IPCResult RecvInit(const bool& aAllowDistinctiveIdentifier,

                          const bool& aAllowPersistentState,

                          InitResolver&& aResolver) override;

  ipc::IPCResult RecvSetServerCertificate(

      const uint32_t& aPromiseId, nsTArray<uint8_t>&& aServerCert) override;

  ipc::IPCResult RecvCreateSessionAndGenerateRequest(

      const uint32_t& aPromiseId, const uint32_t& aSessionType,

      const uint32_t& aInitDataType, nsTArray<uint8_t>&& aInitData) override;

  ipc::IPCResult RecvLoadSession(const uint32_t& aPromiseId,

                                 const uint32_t& aSessionType,

                                 const nsACString& aSessionId) override;

  ipc::IPCResult RecvUpdateSession(const uint32_t& aPromiseId,

                                   const nsACString& aSessionId,

                                   nsTArray<uint8_t>&& aResponse) override;

  ipc::IPCResult RecvCloseSession(const uint32_t& aPromiseId,

                                  const nsACString& aSessionId) override;

  ipc::IPCResult RecvRemoveSession(const uint32_t& aPromiseId,

                                   const nsACString& aSessionId) override;

  ipc::IPCResult RecvCompleteQueryOutputProtectionStatus(

      const bool& aSuccess, const uint32_t& aLinkMask,

      const uint32_t& aProtectionMask) override;

  ipc::IPCResult RecvGetStatusForPolicy(

      const uint32_t& aPromiseId,

      const cdm::HdcpVersion& aMinHdcpVersion) override;

  ipc::IPCResult RecvDecrypt(const uint32_t& aId,

                             const CDMInputBuffer& aBuffer) override;

  ipc::IPCResult RecvInitializeVideoDecoder(

      const CDMVideoDecoderConfig& aConfig) override;

  ipc::IPCResult RecvDeinitializeVideoDecoder() override;

  ipc::IPCResult RecvResetVideoDecoder() override;

  ipc::IPCResult RecvDecryptAndDecodeFrame(

      const CDMInputBuffer& aBuffer) override;

  ipc::IPCResult RecvDrain() override;

  ipc::IPCResult RecvDestroy() override;

  void ReturnOutput(WidevineVideoFrame& aFrame);

  bool HasShmemOfSize(size_t aSize) const;

  template <typename MethodType, typename... ParamType>

  void CallMethod(MethodType, ParamType&&...);

  template <typename MethodType, typename... ParamType>

  void CallOnMessageLoopThread(const char* const, MethodType, ParamType&&...);

  GMPContentChild* mPlugin = nullptr;

  cdm::ContentDecryptionModule_10* mCDM = nullptr;

  typedef SimpleMap<int64_t, uint64_t, ThreadSafePolicy> DurationMap;

  DurationMap mFrameDurations;

  nsTArray<uint32_t> mLoadSessionPromiseIds;

  cdm::Size mCodedSize = {0, 0};

  nsTArray<ipc::Shmem> mBuffers;

  bool mDecoderInitialized = false;

  bool mPersistentStateAllowed = false;

  bool mDestroyed = false;

  nsCString mStorageId;

  typedef MozPromise<bool, nsresult, /* IsExclusive = */ true> InitPromise;

  // Created when we RecvInit, should be resolved once the CDM is initialized

  // or rejected if init fails.

  MozPromiseHolder<InitPromise> mInitPromise;

};

}  // namespace mozilla::gmp

#endif  // ChromiumCDMChild_h_