Bug 1212670 - Implement GMPDecoderModule::SupportsMimeType() and EMEDecoderModule::SupportsMimeType(). r=jwwang

dom/media/platforms/agnostic/eme/EMEDecoderModule.cpp

@@ -14,6 +14,7 @@
 #include "nsServiceManagerUtils.h"
 #include "MediaInfo.h"
 #include "nsClassHashtable.h"
+#include "GMPDecoderModule.h"
 
 namespace mozilla {
 
@@ -301,4 +302,12 @@ EMEDecoderModule::DecoderNeedsConversion(const TrackInfo& aConfig) const
   }
 }
 
+bool
+EMEDecoderModule::SupportsMimeType(const nsACString& aMimeType)
+{
+  Maybe<nsCString> gmp;
+  gmp.emplace(NS_ConvertUTF16toUTF8(mProxy->KeySystem()));
+  return GMPDecoderModule::SupportsMimeType(aMimeType, gmp);
+}
+
 } // namespace mozilla

dom/media/platforms/agnostic/eme/EMEDecoderModule.h

@@ -45,13 +45,7 @@ protected:
   DecoderNeedsConversion(const TrackInfo& aConfig) const override;
 
   bool
-  SupportsMimeType(const nsACString& aMimeType) override
-  {
-    // TODO Properly.
-    return aMimeType.EqualsLiteral("audio/mp4a-latm") ||
-      aMimeType.EqualsLiteral("video/mp4") ||
-      aMimeType.EqualsLiteral("video/avc");
-  }
+  SupportsMimeType(const nsACString& aMimeType) override;
 
 private:
   nsRefPtr<CDMProxy> mProxy;

dom/media/platforms/agnostic/gmp/GMPDecoderModule.cpp

@@ -11,6 +11,8 @@
 #include "mozIGeckoMediaPluginService.h"
 #include "nsServiceManagerUtils.h"
 #include "mozilla/Preferences.h"
+#include "gmp-audio-decode.h"
+#include "gmp-video-decode.h"
 
 namespace mozilla {
 
@@ -124,4 +126,41 @@ GMPDecoderModule::PreferredGMP(const nsACString& aMimeType)
   return rv;
 }
 
+bool
+GMPDecoderModule::SupportsMimeType(const nsACString& aMimeType,
+                                   const Maybe<nsCString>& aGMP)
+{
+  nsTArray<nsCString> tags;
+  nsCString api;
+  if (aMimeType.EqualsLiteral("audio/mp4a-latm")) {
+    tags.AppendElement(NS_LITERAL_CSTRING("aac"));
+    api = NS_LITERAL_CSTRING(GMP_API_AUDIO_DECODER);
+  } else if (aMimeType.EqualsLiteral("video/avc") ||
+             aMimeType.EqualsLiteral("video/mp4")) {
+    tags.AppendElement(NS_LITERAL_CSTRING("h264"));
+    api = NS_LITERAL_CSTRING(GMP_API_VIDEO_DECODER);
+  } else {
+    return false;
+  }
+  if (aGMP.isSome()) {
+    tags.AppendElement(aGMP.value());
+  }
+  nsCOMPtr<mozIGeckoMediaPluginService> mps =
+    do_GetService("@mozilla.org/gecko-media-plugin-service;1");
+  if (NS_WARN_IF(!mps)) {
+    return false;
+  }
+  bool hasPlugin = false;
+  if (NS_FAILED(mps->HasPluginForAPI(api, &tags, &hasPlugin))) {
+    return false;
+  }
+  return hasPlugin;
+}
+
+bool
+GMPDecoderModule::SupportsMimeType(const nsACString& aMimeType)
+{
+  return SupportsMimeType(aMimeType, PreferredGMP(aMimeType));
+}
+
 } // namespace mozilla

dom/media/platforms/agnostic/gmp/GMPDecoderModule.h

@@ -36,17 +36,15 @@ public:
   DecoderNeedsConversion(const TrackInfo& aConfig) const override;
 
   bool
-  SupportsMimeType(const nsACString& aMimeType) override
-  {
-    // TODO properly.
-    return aMimeType.EqualsLiteral("audio/mp4a-latm") ||
-      aMimeType.EqualsLiteral("video/avc");
-  }
+  SupportsMimeType(const nsACString& aMimeType) override;
 
   static void Init();
 
   static const Maybe<nsCString> PreferredGMP(const nsACString& aMimeType);
 
+  static bool SupportsMimeType(const nsACString& aMimeType,
+                               const Maybe<nsCString>& aGMP);
+
 };
 
 } // namespace mozilla