1 files changed, 23 insertions, 2 deletions
diff --git a/dom/media/webm/WebMDecoder.cpp b/dom/media/webm/WebMDecoder.cpp
index b41de6d40..cbe9ffdb7 100644
--- a/dom/media/webm/WebMDecoder.cpp
+++ b/dom/media/webm/WebMDecoder.cpp
@@ -5,6 +5,10 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "mozilla/Preferences.h"
+#ifdef MOZ_AV1
+#include "AOMDecoder.h"
+#endif
+#include "MediaPrefs.h"
 #include "MediaDecoderStateMachine.h"
 #include "WebMDemuxer.h"
 #include "WebMDecoder.h"
@@ -38,7 +42,10 @@ WebMDecoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
 
   const bool isWebMAudio = aMIMETypeExcludingCodecs.EqualsASCII("audio/webm");
   const bool isWebMVideo = aMIMETypeExcludingCodecs.EqualsASCII("video/webm");
-  if (!isWebMAudio && !isWebMVideo) {
+  const bool isMatroskaAudio = aMIMETypeExcludingCodecs.EqualsASCII("audio/x-matroska") ;
+  const bool isMatroskaVideo = aMIMETypeExcludingCodecs.EqualsASCII("video/x-matroska") ;
+
+  if (!isWebMAudio && !isWebMVideo && !isMatroskaAudio && !isMatroskaVideo) {
     return false;
   }
 
@@ -59,12 +66,26 @@ WebMDecoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
     }
     // Note: Only accept VP8/VP9 in a video content type, not in an audio
     // content type.
-    if (isWebMVideo &&
+    if ((isWebMVideo || isMatroskaVideo) &&
         (codec.EqualsLiteral("vp8") || codec.EqualsLiteral("vp8.0") ||
          codec.EqualsLiteral("vp9") || codec.EqualsLiteral("vp9.0"))) {
 
       continue;
     }
+#ifdef MOZ_AV1
+    if (MediaPrefs::AV1Enabled() && IsAV1CodecString(codec)) {
+      continue;
+    }
+#endif
+
+    if (IsH264CodecString(codec)) {
+      continue;
+    }
+
+    if (IsAACCodecString(codec)) {
+      continue;
+    }
+
     // Some unsupported codec.
     return false;
   }