Bug 1245789 - Send name of GMPAdapter over to GMP process in StartPlugin message. r=gerald

This lets the GMPChild know whether it needs to instantiate the WidevineAdapter.

MozReview-Commit-ID: 5X6IrRZPHdu

dom/media/gmp/GMPChild.cpp

@@ -21,6 +21,7 @@
 #include "mozilla/dom/CrashReporterChild.h"
 #include "GMPUtils.h"
 #include "prio.h"
+#include "widevine-adapter/WidevineAdapter.h"
 
 using mozilla::dom::CrashReporterChild;
 
@@ -345,7 +346,7 @@ GMPChild::GetUTF8LibPath(nsACString& aOutLibPath)
 }
 
 bool
-GMPChild::AnswerStartPlugin()
+GMPChild::AnswerStartPlugin(const nsString& aAdapter)
 {
   LOGD("%s", __FUNCTION__);
 
@@ -378,11 +379,14 @@ GMPChild::AnswerStartPlugin()
   }
 #endif
 
+  GMPAdapter* adapter = aAdapter.EqualsLiteral("widevine")
+                      ? new WidevineAdapter() : nullptr;
   if (!mGMPLoader->Load(libPath.get(),
                         libPath.Length(),
                         mNodeId.BeginWriting(),
                         mNodeId.Length(),
-                        platformAPI)) {
+                        platformAPI,
+                        adapter)) {
     NS_WARNING("Failed to load GMP");
     delete platformAPI;
     return false;

dom/media/gmp/GMPChild.h

@@ -53,7 +53,7 @@ private:
   bool GetUTF8LibPath(nsACString& aOutLibPath);
 
   bool RecvSetNodeId(const nsCString& aNodeId) override;
-  bool AnswerStartPlugin() override;
+  bool AnswerStartPlugin(const nsString& aAdapter) override;
   bool RecvPreloadLibs(const nsCString& aLibs) override;
 
   PCrashReporterChild* AllocPCrashReporterChild(const NativeThreadId& aThread) override;

dom/media/gmp/GMPParent.cpp

@@ -95,6 +95,7 @@ GMPParent::CloneFrom(const GMPParent* aOther)
   for (const GMPCapability& cap : aOther->mCapabilities) {
     mCapabilities.AppendElement(cap);
   }
+  mAdapter = aOther->mAdapter;
   return NS_OK;
 }
 
@@ -190,7 +191,7 @@ GMPParent::LoadProcess()
 #endif
 
     // Intr call to block initialization on plugin load.
-    ok = CallStartPlugin();
+    ok = CallStartPlugin(mAdapter);
     if (!ok) {
       LOGD("%s: Failed to send start to child process", __FUNCTION__);
       return NS_ERROR_FAILURE;
@@ -941,6 +942,7 @@ GMPParent::ParseChromiumManifest(nsString aJSON)
   mCapabilities.AppendElement(Move(decrypt));
 
   MOZ_ASSERT(mName.EqualsLiteral("widevinecdm"));
+  mAdapter = NS_LITERAL_STRING("widevine");
 #ifdef XP_WIN
   mLibs = NS_LITERAL_CSTRING("dxva2.dll");
 #endif

dom/media/gmp/GMPParent.h

@@ -213,6 +213,7 @@ private:
 #ifdef XP_WIN
   nsCString mLibs;
 #endif
+  nsString mAdapter;
   uint32_t mPluginId;
   nsTArray<GMPCapability> mCapabilities;
   GMPProcessParent* mProcess;

dom/media/gmp/PGMP.ipdl

@@ -34,7 +34,7 @@ parent:
 child:
   async BeginAsyncShutdown();
   async CrashPluginNow();
-  intr StartPlugin();
+  intr StartPlugin(nsString adapter);
   async SetNodeId(nsCString nodeId);
   async PreloadLibs(nsCString libs);
   async CloseActive();