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path: root/dom/media/eme/mediadrm/MediaDrmCDMProxy.cpp
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */

#include "mozilla/dom/MediaKeySession.h"
#include "mozilla/MediaDrmCDMProxy.h"
#include "MediaDrmCDMCallbackProxy.h"

using namespace mozilla::java::sdk;

namespace mozilla {

MediaDrmSessionType ToMediaDrmSessionType(
    dom::MediaKeySessionType aSessionType) {
  switch (aSessionType) {
    case dom::MediaKeySessionType::Temporary:
      return kKeyStreaming;
    case dom::MediaKeySessionType::Persistent_license:
      return kKeyOffline;
    default:
      return kKeyStreaming;
  };
}

MediaDrmCDMProxy::MediaDrmCDMProxy(dom::MediaKeys* aKeys,
                                   const nsAString& aKeySystem,
                                   bool aDistinctiveIdentifierRequired,
                                   bool aPersistentStateRequired,
                                   nsIEventTarget* aMainThread)
    : CDMProxy(aKeys, aKeySystem, aDistinctiveIdentifierRequired,
               aPersistentStateRequired, aMainThread),
      mCDM(nullptr),
      mShutdownCalled(false) {
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_COUNT_CTOR(MediaDrmCDMProxy);
}

MediaDrmCDMProxy::~MediaDrmCDMProxy() { MOZ_COUNT_DTOR(MediaDrmCDMProxy); }

void MediaDrmCDMProxy::Init(PromiseId aPromiseId, const nsAString& aOrigin,
                            const nsAString& aTopLevelOrigin,
                            const nsAString& aName) {
  MOZ_ASSERT(NS_IsMainThread());
  NS_ENSURE_TRUE_VOID(!mKeys.IsNull());

  EME_LOG("MediaDrmCDMProxy::Init (%s, %s) %s",
          NS_ConvertUTF16toUTF8(aOrigin).get(),
          NS_ConvertUTF16toUTF8(aTopLevelOrigin).get(),
          NS_ConvertUTF16toUTF8(aName).get());

  // Create a thread to work with cdm.
  if (!mOwnerThread) {
    nsresult rv =
        NS_NewNamedThread("MDCDMThread", getter_AddRefs(mOwnerThread));
    if (NS_FAILED(rv)) {
      RejectPromise(aPromiseId, NS_ERROR_DOM_INVALID_STATE_ERR,
                    NS_LITERAL_CSTRING(
                        "Couldn't create CDM thread MediaDrmCDMProxy::Init"));
      return;
    }
  }

  mCDM = mozilla::MakeUnique<MediaDrmProxySupport>(mKeySystem);
  nsCOMPtr<nsIRunnable> task(
      NewRunnableMethod<uint32_t>("MediaDrmCDMProxy::md_Init", this,
                                  &MediaDrmCDMProxy::md_Init, aPromiseId));
  mOwnerThread->Dispatch(task, NS_DISPATCH_NORMAL);
}

void MediaDrmCDMProxy::CreateSession(uint32_t aCreateSessionToken,
                                     MediaKeySessionType aSessionType,
                                     PromiseId aPromiseId,
                                     const nsAString& aInitDataType,
                                     nsTArray<uint8_t>& aInitData) {
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(mOwnerThread);

  UniquePtr<CreateSessionData> data(new CreateSessionData());
  data->mSessionType = aSessionType;
  data->mCreateSessionToken = aCreateSessionToken;
  data->mPromiseId = aPromiseId;
  data->mInitDataType = NS_ConvertUTF16toUTF8(aInitDataType);
  data->mInitData = Move(aInitData);

  nsCOMPtr<nsIRunnable> task(NewRunnableMethod<UniquePtr<CreateSessionData>&&>(
      "MediaDrmCDMProxy::md_CreateSession", this,
      &MediaDrmCDMProxy::md_CreateSession, Move(data)));
  mOwnerThread->Dispatch(task, NS_DISPATCH_NORMAL);
}

void MediaDrmCDMProxy::LoadSession(PromiseId aPromiseId,
                                   dom::MediaKeySessionType aSessionType,
                                   const nsAString& aSessionId) {
  // TODO: Implement LoadSession.
  RejectPromise(
      aPromiseId, NS_ERROR_DOM_INVALID_STATE_ERR,
      NS_LITERAL_CSTRING("Currently Fennec does not support LoadSession"));
}

void MediaDrmCDMProxy::SetServerCertificate(PromiseId aPromiseId,
                                            nsTArray<uint8_t>& aCert) {
  // TODO: Implement SetServerCertificate.
  RejectPromise(aPromiseId, NS_ERROR_DOM_INVALID_STATE_ERR,
                NS_LITERAL_CSTRING(
                    "Currently Fennec does not support SetServerCertificate"));
}

void MediaDrmCDMProxy::UpdateSession(const nsAString& aSessionId,
                                     PromiseId aPromiseId,
                                     nsTArray<uint8_t>& aResponse) {
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(mOwnerThread);
  NS_ENSURE_TRUE_VOID(!mKeys.IsNull());

  UniquePtr<UpdateSessionData> data(new UpdateSessionData());
  data->mPromiseId = aPromiseId;
  data->mSessionId = NS_ConvertUTF16toUTF8(aSessionId);
  data->mResponse = Move(aResponse);

  nsCOMPtr<nsIRunnable> task(NewRunnableMethod<UniquePtr<UpdateSessionData>&&>(
      "MediaDrmCDMProxy::md_UpdateSession", this,
      &MediaDrmCDMProxy::md_UpdateSession, Move(data)));
  mOwnerThread->Dispatch(task, NS_DISPATCH_NORMAL);
}

void MediaDrmCDMProxy::CloseSession(const nsAString& aSessionId,
                                    PromiseId aPromiseId) {
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(mOwnerThread);
  NS_ENSURE_TRUE_VOID(!mKeys.IsNull());

  UniquePtr<SessionOpData> data(new SessionOpData());
  data->mPromiseId = aPromiseId;
  data->mSessionId = NS_ConvertUTF16toUTF8(aSessionId);

  nsCOMPtr<nsIRunnable> task(NewRunnableMethod<UniquePtr<SessionOpData>&&>(
      "MediaDrmCDMProxy::md_CloseSession", this,
      &MediaDrmCDMProxy::md_CloseSession, Move(data)));
  mOwnerThread->Dispatch(task, NS_DISPATCH_NORMAL);
}

void MediaDrmCDMProxy::RemoveSession(const nsAString& aSessionId,
                                     PromiseId aPromiseId) {
  // TODO: Implement RemoveSession.
  RejectPromise(
      aPromiseId, NS_ERROR_DOM_INVALID_STATE_ERR,
      NS_LITERAL_CSTRING("Currently Fennec does not support RemoveSession"));
}

void MediaDrmCDMProxy::Shutdown() {
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(mOwnerThread);
  nsCOMPtr<nsIRunnable> task(NewRunnableMethod(
      "MediaDrmCDMProxy::md_Shutdown", this, &MediaDrmCDMProxy::md_Shutdown));

  mOwnerThread->Dispatch(task, NS_DISPATCH_NORMAL);
  mOwnerThread->Shutdown();
  mOwnerThread = nullptr;
}

void MediaDrmCDMProxy::Terminated() {
  // TODO: Implement Terminated.
  // Should find a way to handle the case when remote side MediaDrm crashed.
}

const nsCString& MediaDrmCDMProxy::GetNodeId() const { return mNodeId; }

void MediaDrmCDMProxy::OnSetSessionId(uint32_t aCreateSessionToken,
                                      const nsAString& aSessionId) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mKeys.IsNull()) {
    return;
  }

  RefPtr<dom::MediaKeySession> session(
      mKeys->GetPendingSession(aCreateSessionToken));
  if (session) {
    session->SetSessionId(aSessionId);
  }
}

void MediaDrmCDMProxy::OnResolveLoadSessionPromise(uint32_t aPromiseId,
                                                   bool aSuccess) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mKeys.IsNull()) {
    return;
  }
  mKeys->OnSessionLoaded(aPromiseId, aSuccess);
}

void MediaDrmCDMProxy::OnSessionMessage(const nsAString& aSessionId,
                                        dom::MediaKeyMessageType aMessageType,
                                        const nsTArray<uint8_t>& aMessage) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mKeys.IsNull()) {
    return;
  }
  RefPtr<dom::MediaKeySession> session(mKeys->GetSession(aSessionId));
  if (session) {
    session->DispatchKeyMessage(aMessageType, aMessage);
  }
}

void MediaDrmCDMProxy::OnExpirationChange(const nsAString& aSessionId,
                                          UnixTime aExpiryTime) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mKeys.IsNull()) {
    return;
  }
  RefPtr<dom::MediaKeySession> session(mKeys->GetSession(aSessionId));
  if (session) {
    session->SetExpiration(static_cast<double>(aExpiryTime));
  }
}

void MediaDrmCDMProxy::OnSessionClosed(const nsAString& aSessionId) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mKeys.IsNull()) {
    return;
  }
  RefPtr<dom::MediaKeySession> session(mKeys->GetSession(aSessionId));
  if (session) {
    session->OnClosed();
  }
}

void MediaDrmCDMProxy::OnSessionError(const nsAString& aSessionId,
                                      nsresult aException, uint32_t aSystemCode,
                                      const nsAString& aMsg) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mKeys.IsNull()) {
    return;
  }
  RefPtr<dom::MediaKeySession> session(mKeys->GetSession(aSessionId));
  if (session) {
    session->DispatchKeyError(aSystemCode);
  }
}

void MediaDrmCDMProxy::OnRejectPromise(uint32_t aPromiseId,
                                       nsresult aDOMException,
                                       const nsCString& aMsg) {
  MOZ_ASSERT(NS_IsMainThread());
  RejectPromise(aPromiseId, aDOMException, aMsg);
}

RefPtr<DecryptPromise> MediaDrmCDMProxy::Decrypt(MediaRawData* aSample) {
  MOZ_ASSERT_UNREACHABLE("Fennec could not handle decrypting individually");
  return nullptr;
}

void MediaDrmCDMProxy::OnDecrypted(uint32_t aId, DecryptStatus aResult,
                                   const nsTArray<uint8_t>& aDecryptedData) {
  MOZ_ASSERT_UNREACHABLE("Fennec could not handle decrypted event");
}

void MediaDrmCDMProxy::RejectPromise(PromiseId aId, nsresult aCode,
                                     const nsCString& aReason) {
  if (NS_IsMainThread()) {
    if (!mKeys.IsNull()) {
      mKeys->RejectPromise(aId, aCode, aReason);
    }
  } else {
    nsCOMPtr<nsIRunnable> task(
        new RejectPromiseTask(this, aId, aCode, aReason));
    mMainThread->Dispatch(task.forget(), NS_DISPATCH_NORMAL);
  }
}

void MediaDrmCDMProxy::ResolvePromise(PromiseId aId) {
  if (NS_IsMainThread()) {
    if (!mKeys.IsNull()) {
      mKeys->ResolvePromise(aId);
    } else {
      NS_WARNING("MediaDrmCDMProxy unable to resolve promise!");
    }
  } else {
    nsCOMPtr<nsIRunnable> task;
    task =
        NewRunnableMethod<PromiseId>("MediaDrmCDMProxy::ResolvePromise", this,
                                     &MediaDrmCDMProxy::ResolvePromise, aId);
    mMainThread->Dispatch(task.forget(), NS_DISPATCH_NORMAL);
  }
}

const nsString& MediaDrmCDMProxy::KeySystem() const { return mKeySystem; }

DataMutex<CDMCaps>& MediaDrmCDMProxy::Capabilites() { return mCapabilites; }

void MediaDrmCDMProxy::OnKeyStatusesChange(const nsAString& aSessionId) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mKeys.IsNull()) {
    return;
  }
  RefPtr<dom::MediaKeySession> session(mKeys->GetSession(aSessionId));
  if (session) {
    session->DispatchKeyStatusesChange();
  }
}

void MediaDrmCDMProxy::GetStatusForPolicy(PromiseId aPromiseId,
                                          const nsAString& aMinHdcpVersion) {
  // TODO: Implement GetStatusForPolicy.
  RejectPromise(aPromiseId, NS_ERROR_DOM_NOT_SUPPORTED_ERR,
                NS_LITERAL_CSTRING(
                    "Currently Fennec does not support GetStatusForPolicy"));
}

#ifdef DEBUG
bool MediaDrmCDMProxy::IsOnOwnerThread() {
  return NS_GetCurrentThread() == mOwnerThread;
}
#endif

const nsString& MediaDrmCDMProxy::GetMediaDrmStubId() const {
  MOZ_ASSERT(mCDM);
  return mCDM->GetMediaDrmStubId();
}

void MediaDrmCDMProxy::OnCDMCreated(uint32_t aPromiseId) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mKeys.IsNull()) {
    return;
  }

  if (mCDM) {
    mKeys->OnCDMCreated(aPromiseId, 0);
    return;
  }

  // No CDM? Just reject the promise.
  mKeys->RejectPromise(aPromiseId, NS_ERROR_DOM_INVALID_STATE_ERR,
                       NS_LITERAL_CSTRING("Null CDM in OnCDMCreated()"));
}

void MediaDrmCDMProxy::md_Init(uint32_t aPromiseId) {
  MOZ_ASSERT(IsOnOwnerThread());
  MOZ_ASSERT(mCDM);

  mCallback.reset(new MediaDrmCDMCallbackProxy(this));
  mCDM->Init(mCallback.get());
  nsCOMPtr<nsIRunnable> task(
      NewRunnableMethod<uint32_t>("MediaDrmCDMProxy::OnCDMCreated", this,
                                  &MediaDrmCDMProxy::OnCDMCreated, aPromiseId));
  mMainThread->Dispatch(task.forget(), NS_DISPATCH_NORMAL);
}

void MediaDrmCDMProxy::md_CreateSession(UniquePtr<CreateSessionData>&& aData) {
  MOZ_ASSERT(IsOnOwnerThread());

  if (!mCDM) {
    RejectPromise(aData->mPromiseId, NS_ERROR_DOM_INVALID_STATE_ERR,
                  NS_LITERAL_CSTRING("Null CDM in md_CreateSession"));
    return;
  }

  mCDM->CreateSession(aData->mCreateSessionToken, aData->mPromiseId,
                      aData->mInitDataType, aData->mInitData,
                      ToMediaDrmSessionType(aData->mSessionType));
}

void MediaDrmCDMProxy::md_UpdateSession(UniquePtr<UpdateSessionData>&& aData) {
  MOZ_ASSERT(IsOnOwnerThread());

  if (!mCDM) {
    RejectPromise(aData->mPromiseId, NS_ERROR_DOM_INVALID_STATE_ERR,
                  NS_LITERAL_CSTRING("Null CDM in md_UpdateSession"));
    return;
  }
  mCDM->UpdateSession(aData->mPromiseId, aData->mSessionId, aData->mResponse);
}

void MediaDrmCDMProxy::md_CloseSession(UniquePtr<SessionOpData>&& aData) {
  MOZ_ASSERT(IsOnOwnerThread());

  if (!mCDM) {
    RejectPromise(aData->mPromiseId, NS_ERROR_DOM_INVALID_STATE_ERR,
                  NS_LITERAL_CSTRING("Null CDM in md_CloseSession"));
    return;
  }
  mCDM->CloseSession(aData->mPromiseId, aData->mSessionId);
}

void MediaDrmCDMProxy::md_Shutdown() {
  MOZ_ASSERT(IsOnOwnerThread());
  MOZ_ASSERT(mCDM);
  if (mShutdownCalled) {
    return;
  }
  mShutdownCalled = true;
  mCDM->Shutdown();
  mCDM = nullptr;
}

}  // namespace mozilla