Bug 1343409 - HTMLMediaElement::MozRequestDebugInfo returns EMEInfo. r=cpearce

MozReview-Commit-ID: 1iQP3OJmwdP

--HG--
extra : rebase_source : 171155ab5e58cac8cc9db9109a5c2fc88b1930d3

dom/html/HTMLMediaElement.cpp

@@ -120,6 +120,7 @@ static mozilla::LazyLogModule gMediaElementEventsLog("nsMediaElementEvents");
 
 #include "mozilla/dom/HTMLVideoElement.h"
 #include "mozilla/dom/VideoPlaybackQuality.h"
+#include "HTMLMediaElement.h"
 
 using namespace mozilla::layers;
 using mozilla::net::nsMediaFragmentURIParser;
@@ -1482,6 +1483,14 @@ HTMLMediaElement::MozRequestDebugInfo(ErrorResult& aRv)
   nsAutoString result;
   GetMozDebugReaderData(result);
 
+  if (mMediaKeys) {
+    nsString EMEInfo;
+    GetEMEInfo(EMEInfo);
+    result.AppendLiteral("EME Info: ");
+    result.Append(EMEInfo);
+    result.AppendLiteral("\n");
+  }
+
   if (mDecoder) {
     mDecoder->RequestDebugInfo()->Then(
       AbstractThread::MainThread(), __func__,
@@ -7345,6 +7354,25 @@ HTMLMediaElement::AsyncRejectPendingPlayPromises(nsresult aError)
                        event.forget());
 }
 
+void
+HTMLMediaElement::GetEMEInfo(nsString& aEMEInfo)
+{
+  if (!mMediaKeys) {
+    return;
+  }
+
+  nsString keySystem;
+  mMediaKeys->GetKeySystem(keySystem);
+
+  nsString sessionsInfo;
+  mMediaKeys->GetSessionsInfo(sessionsInfo);
+
+  aEMEInfo.AppendLiteral("Key System=");
+  aEMEInfo.Append(keySystem);
+  aEMEInfo.AppendLiteral(" SessionsInfo=");
+  aEMEInfo.Append(sessionsInfo);
+}
+
 bool HasDebuggerPrivilege(JSContext* aCx, JSObject* aObj)
 {
   return nsContentUtils::CallerHasPermission(aCx,

dom/html/HTMLMediaElement.h

@@ -287,6 +287,8 @@ public:
   // called to notify that the principal of the decoder's media resource has changed.
   void NotifyDecoderPrincipalChanged() final override;
 
+  void GetEMEInfo(nsString& aEMEInfo);
+
   // An interface for observing principal changes on the media elements
   // MediaDecoder. This will also be notified if the active CORSMode changes.
   class DecoderPrincipalChangeObserver

dom/media/eme/MediaKeyStatusMap.cpp

@@ -95,6 +95,13 @@ MediaKeyStatusMap::GetKeyAtIndex(uint32_t aIndex) const
   return TypedArrayCreator<ArrayBuffer>(mStatuses[aIndex].mKeyId);
 }
 
+nsString
+MediaKeyStatusMap::GetKeyIDAsHexString(uint32_t aIndex) const
+{
+  MOZ_ASSERT(aIndex < GetIterableLength());
+  return NS_ConvertUTF8toUTF16(ToHexString(mStatuses[aIndex].mKeyId));
+}
+
 MediaKeyStatus
 MediaKeyStatusMap::GetValueAtIndex(uint32_t aIndex) const
 {

dom/media/eme/MediaKeyStatusMap.h

@@ -53,6 +53,7 @@ public:
 
   uint32_t GetIterableLength() const;
   TypedArrayCreator<ArrayBuffer> GetKeyAtIndex(uint32_t aIndex) const;
+  nsString GetKeyIDAsHexString(uint32_t aIndex) const;
   MediaKeyStatus GetValueAtIndex(uint32_t aIndex) const;
 
   void Update(const nsTArray<CDMCaps::KeyStatus>& keys);

dom/media/eme/MediaKeys.cpp

@@ -577,5 +577,33 @@ MediaKeys::Unbind()
   mElement = nullptr;
 }
 
+void
+MediaKeys::GetSessionsInfo(nsString& sessionsInfo)
+{
+  for (KeySessionHashMap::Iterator it = mKeySessions.Iter();
+       !it.Done();
+       it.Next()) {
+    MediaKeySession* keySession = it.Data();
+    nsString sessionID;
+    keySession->GetSessionId(sessionID);
+    sessionsInfo.AppendLiteral("(sid:");
+    sessionsInfo.Append(sessionID);
+    MediaKeyStatusMap* keyStatusMap = keySession->KeyStatuses();
+    for (uint32_t i = 0; i < keyStatusMap->GetIterableLength(); i++) {
+      nsString keyID = keyStatusMap->GetKeyIDAsHexString(i);
+      sessionsInfo.AppendLiteral("(kid:");
+      sessionsInfo.Append(keyID);
+      using IntegerType = typename std::underlying_type<MediaKeyStatus>::type;
+      auto idx = static_cast<IntegerType>(keyStatusMap->GetValueAtIndex(i));
+      const char* keyStatus = MediaKeyStatusValues::strings[idx].value;
+      sessionsInfo.AppendLiteral(" status:");
+      sessionsInfo.Append(
+        NS_ConvertUTF8toUTF16((nsDependentCString(keyStatus))));
+      sessionsInfo.AppendLiteral(")");
+    }
+    sessionsInfo.AppendLiteral(")");
+  }
+}
+
 } // namespace dom
 } // namespace mozilla

dom/media/eme/MediaKeys.h

@@ -128,6 +128,8 @@ public:
   // Returns true if this MediaKeys has been bound to a media element.
   bool IsBoundToMediaElement() const;
 
+  void GetSessionsInfo(nsString& sessionsInfo);
+
 private:
 
   // Instantiate CDMProxy instance.