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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/. */
+
+#ifndef CDMProxy_h_
+#define CDMProxy_h_
+
+#include "mozilla/CDMCaps.h"
+#include "mozilla/DataMutex.h"
+#include "mozilla/MozPromise.h"
+
+#include "mozilla/dom/MediaKeyMessageEvent.h"
+#include "mozilla/dom/MediaKeys.h"
+
+#include "nsIThread.h"
+
+namespace mozilla {
+class ErrorResult;
+class MediaRawData;
+class ChromiumCDMProxy;
+#ifdef MOZ_WMF_CDM
+class WMFCDMProxy;
+#endif
+
+namespace eme {
+enum DecryptStatus {
+ Ok = 0,
+ GenericErr = 1,
+ NoKeyErr = 2,
+ AbortedErr = 3,
+};
+}
+
+using eme::DecryptStatus;
+
+struct DecryptResult {
+ DecryptResult(DecryptStatus aStatus, MediaRawData* aSample)
+ : mStatus(aStatus), mSample(aSample) {}
+ DecryptStatus mStatus;
+ RefPtr<MediaRawData> mSample;
+};
+
+typedef MozPromise<DecryptResult, DecryptResult, /* IsExclusive = */ true>
+ DecryptPromise;
+
+class CDMKeyInfo {
+ public:
+ explicit CDMKeyInfo(const nsTArray<uint8_t>& aKeyId)
+ : mKeyId(aKeyId.Clone()), mStatus() {}
+
+ CDMKeyInfo(const nsTArray<uint8_t>& aKeyId,
+ const dom::Optional<dom::MediaKeyStatus>& aStatus)
+ : mKeyId(aKeyId.Clone()), mStatus(aStatus.Value()) {}
+
+ // The copy-ctor and copy-assignment operator for Optional<T> are declared as
+ // delete, so override CDMKeyInfo copy-ctor for nsTArray operations.
+ CDMKeyInfo(const CDMKeyInfo& aKeyInfo) {
+ mKeyId = aKeyInfo.mKeyId.Clone();
+ if (aKeyInfo.mStatus.WasPassed()) {
+ mStatus.Construct(aKeyInfo.mStatus.Value());
+ }
+ }
+
+ nsTArray<uint8_t> mKeyId;
+ dom::Optional<dom::MediaKeyStatus> mStatus;
+};
+
+// Time is defined as the number of milliseconds since the
+// Epoch (00:00:00 UTC, January 1, 1970).
+typedef int64_t UnixTime;
+
+// Proxies calls CDM, and proxies calls back.
+// Note: Promises are passed in via a PromiseId, so that the ID can be
+// passed via IPC to the CDM, which can then signal when to reject or
+// resolve the promise using its PromiseId.
+class CDMProxy {
+ protected:
+ typedef dom::PromiseId PromiseId;
+ typedef dom::MediaKeySessionType MediaKeySessionType;
+
+ public:
+ NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
+
+ // Main thread only.
+ // Loads the CDM corresponding to mKeySystem.
+ // Calls MediaKeys::OnCDMCreated() when the CDM is created.
+ virtual void Init(PromiseId aPromiseId, const nsAString& aOrigin,
+ const nsAString& aTopLevelOrigin,
+ const nsAString& aName) = 0;
+
+ // Main thread only.
+ // Uses the CDM to create a key session.
+ // Calls MediaKeys::OnSessionActivated() when session is created.
+ // Assumes ownership of (std::move()s) aInitData's contents.
+ virtual void CreateSession(uint32_t aCreateSessionToken,
+ MediaKeySessionType aSessionType,
+ PromiseId aPromiseId,
+ const nsAString& aInitDataType,
+ nsTArray<uint8_t>& aInitData) = 0;
+
+ // Main thread only.
+ // Uses the CDM to load a presistent session stored on disk.
+ // Calls MediaKeys::OnSessionActivated() when session is loaded.
+ virtual void LoadSession(PromiseId aPromiseId,
+ dom::MediaKeySessionType aSessionType,
+ const nsAString& aSessionId) = 0;
+
+ // Main thread only.
+ // Sends a new certificate to the CDM.
+ // Calls MediaKeys->ResolvePromise(aPromiseId) after the CDM has
+ // processed the request.
+ // Assumes ownership of (std::move()s) aCert's contents.
+ virtual void SetServerCertificate(PromiseId aPromiseId,
+ nsTArray<uint8_t>& aCert) = 0;
+
+ // Main thread only.
+ // Sends an update to the CDM.
+ // Calls MediaKeys->ResolvePromise(aPromiseId) after the CDM has
+ // processed the request.
+ // Assumes ownership of (std::move()s) aResponse's contents.
+ virtual void UpdateSession(const nsAString& aSessionId, PromiseId aPromiseId,
+ nsTArray<uint8_t>& aResponse) = 0;
+
+ // Main thread only.
+ // Calls MediaKeys->ResolvePromise(aPromiseId) after the CDM has
+ // processed the request.
+ // If processing this operation results in the session actually closing,
+ // we also call MediaKeySession::OnClosed(), which in turn calls
+ // MediaKeys::OnSessionClosed().
+ virtual void CloseSession(const nsAString& aSessionId,
+ PromiseId aPromiseId) = 0;
+
+ // Main thread only.
+ // Removes all data for a persisent session.
+ // Calls MediaKeys->ResolvePromise(aPromiseId) after the CDM has
+ // processed the request.
+ virtual void RemoveSession(const nsAString& aSessionId,
+ PromiseId aPromiseId) = 0;
+
+ // Main thread only.
+ // Called to signal a request for output protection information from the CDM.
+ // This should forward the call up the stack where the query should be
+ // performed and then responded to via `NotifyOutputProtectionStatus`.
+ virtual void QueryOutputProtectionStatus() = 0;
+
+ // NotifyOutputProtectionStatus enums. Explicit values are specified to make
+ // it easy to match values in logs.
+ enum class OutputProtectionCheckStatus : uint8_t {
+ CheckFailed = 0,
+ CheckSuccessful = 1,
+ };
+
+ enum class OutputProtectionCaptureStatus : uint8_t {
+ CapturePossilbe = 0,
+ CaptureNotPossible = 1,
+ Unused = 2,
+ };
+ // End NotifyOutputProtectionStatus enums
+
+ // Main thread only.
+ // Notifies this proxy of the protection status for the media the CDM is
+ // associated with. This can be called in response to
+ // `QueryOutputProtectionStatus`, but can also be called without an
+ // associated query. In both cases the information will be forwarded to
+ // the CDM host machinery and used to handle requests from the CDM.
+ // @param aCheckStatus did the check succeed or not.
+ // @param aCaptureStatus if the check succeeded, this reflects if capture
+ // of media could take place. This doesn't mean capture is taking place.
+ // Callers should be conservative with this value such that it's okay to pass
+ // CapturePossilbe even if capture is not happening, but should never pass
+ // CaptureNotPossible if it could happen. If the check failed, this value is
+ // not used, and callers should pass Unused to indicate this.
+ virtual void NotifyOutputProtectionStatus(
+ OutputProtectionCheckStatus aCheckStatus,
+ OutputProtectionCaptureStatus aCaptureStatus) = 0;
+
+ // Main thread only.
+ virtual void Shutdown() = 0;
+
+ // Main thread only.
+ virtual void Terminated() = 0;
+
+ // Threadsafe.
+ const nsCString& GetNodeId() const { return mNodeId; };
+
+ // Main thread only.
+ virtual void OnSetSessionId(uint32_t aCreateSessionToken,
+ const nsAString& aSessionId) = 0;
+
+ // Main thread only.
+ virtual void OnResolveLoadSessionPromise(uint32_t aPromiseId,
+ bool aSuccess) = 0;
+
+ // Main thread only.
+ virtual void OnSessionMessage(const nsAString& aSessionId,
+ dom::MediaKeyMessageType aMessageType,
+ const nsTArray<uint8_t>& aMessage) = 0;
+
+ // Main thread only.
+ virtual void OnExpirationChange(const nsAString& aSessionId,
+ UnixTime aExpiryTime) = 0;
+
+ // Main thread only.
+ virtual void OnSessionClosed(const nsAString& aSessionId) = 0;
+
+ // Main thread only.
+ virtual void OnSessionError(const nsAString& aSessionId, nsresult aException,
+ uint32_t aSystemCode, const nsAString& aMsg) = 0;
+
+ // Main thread only.
+ virtual void OnRejectPromise(uint32_t aPromiseId, ErrorResult&& aException,
+ const nsCString& aMsg) = 0;
+
+ virtual RefPtr<DecryptPromise> Decrypt(MediaRawData* aSample) = 0;
+
+ // Owner thread only.
+ virtual void OnDecrypted(uint32_t aId, DecryptStatus aResult,
+ const nsTArray<uint8_t>& aDecryptedData) = 0;
+
+ // Reject promise with the given ErrorResult.
+ //
+ // Can be called from any thread.
+ virtual void RejectPromise(PromiseId aId, ErrorResult&& aException,
+ const nsCString& aReason) = 0;
+
+ // Resolves promise with "undefined".
+ // Can be called from any thread.
+ virtual void ResolvePromise(PromiseId aId) = 0;
+
+ // Threadsafe.
+ const nsString& KeySystem() const { return mKeySystem; };
+
+ DataMutex<CDMCaps>& Capabilites() { return mCapabilites; };
+
+ // Main thread only.
+ virtual void OnKeyStatusesChange(const nsAString& aSessionId) = 0;
+
+ // Main thread only.
+ // Calls MediaKeys->ResolvePromiseWithKeyStatus(aPromiseId, aKeyStatus) after
+ // the CDM has processed the request.
+ virtual void GetStatusForPolicy(PromiseId aPromiseId,
+ const nsAString& aMinHdcpVersion) = 0;
+
+#ifdef DEBUG
+ virtual bool IsOnOwnerThread() = 0;
+#endif
+
+ virtual ChromiumCDMProxy* AsChromiumCDMProxy() { return nullptr; }
+
+#ifdef MOZ_WMF_CDM
+ virtual WMFCDMProxy* AsWMFCDMProxy() { return nullptr; }
+#endif
+
+ protected:
+ // Main thread only.
+ CDMProxy(dom::MediaKeys* aKeys, const nsAString& aKeySystem,
+ bool aDistinctiveIdentifierRequired, bool aPersistentStateRequired)
+ : mKeys(aKeys),
+ mKeySystem(aKeySystem),
+ mCapabilites("CDMProxy::mCDMCaps"),
+ mDistinctiveIdentifierRequired(aDistinctiveIdentifierRequired),
+ mPersistentStateRequired(aPersistentStateRequired),
+ mMainThread(GetMainThreadSerialEventTarget()) {
+ MOZ_ASSERT(NS_IsMainThread());
+ }
+
+ virtual ~CDMProxy() {}
+
+ // Helper to enforce that a raw pointer is only accessed on the main thread.
+ template <class Type>
+ class MainThreadOnlyRawPtr {
+ public:
+ explicit MainThreadOnlyRawPtr(Type* aPtr) : mPtr(aPtr) {
+ MOZ_ASSERT(NS_IsMainThread());
+ }
+
+ bool IsNull() const {
+ MOZ_ASSERT(NS_IsMainThread());
+ return !mPtr;
+ }
+
+ void Clear() {
+ MOZ_ASSERT(NS_IsMainThread());
+ mPtr = nullptr;
+ }
+
+ Type* operator->() const MOZ_NO_ADDREF_RELEASE_ON_RETURN {
+ MOZ_ASSERT(NS_IsMainThread());
+ return mPtr;
+ }
+
+ private:
+ Type* mPtr;
+ };
+
+ // Our reference back to the MediaKeys object.
+ // WARNING: This is a non-owning reference that is cleared by MediaKeys
+ // destructor. only use on main thread, and always nullcheck before using!
+ MainThreadOnlyRawPtr<dom::MediaKeys> mKeys;
+
+ const nsString mKeySystem;
+
+ // Onwer specified thread. e.g. Gecko Media Plugin thread.
+ // All interactions with the out-of-process EME plugin must come from this
+ // thread.
+ RefPtr<nsIThread> mOwnerThread;
+
+ nsCString mNodeId;
+
+ DataMutex<CDMCaps> mCapabilites;
+
+ const bool mDistinctiveIdentifierRequired;
+ const bool mPersistentStateRequired;
+
+ // The main thread associated with the root document.
+ const nsCOMPtr<nsISerialEventTarget> mMainThread;
+};
+
+} // namespace mozilla
+
+#endif // CDMProxy_h_