Bug 1176218 - p3. Add DecoderTraits::CanHandleContentType - r=jya

Instead of taking MIME&codecs strings, CanHandleContentType takes an
MediaContentType, which can be used to access these and other parameters.

MozReview-Commit-ID: 14Cg6JoQS0g

--HG--
extra : rebase_source : 85b8e852f004b2728b06831c43b33ee4e7aebe52

dom/media/DecoderTraits.cpp

@@ -5,6 +5,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "DecoderTraits.h"
+#include "MediaContentType.h"
 #include "MediaDecoder.h"
 #include "nsCharSeparatedTokenizer.h"
 #include "nsMimeTypes.h"
@@ -492,6 +493,21 @@ DecoderTraits::CanHandleMediaType(const char* aMIMEType,
   return CANPLAY_NO;
 }
 
+/* static */
+CanPlayStatus
+DecoderTraits::CanHandleContentType(const MediaContentType& aContentType,
+                                    DecoderDoctorDiagnostics* aDiagnostics)
+{
+  if (!aContentType.IsValid()) {
+    return CANPLAY_NO;
+  }
+
+  return CanHandleMediaType(aContentType.GetMIMEType().Data(),
+                            aContentType.HaveCodecs(),
+                            aContentType.GetCodecs(),
+                            aDiagnostics);
+}
+
 // Instantiates but does not initialize decoder.
 static
 already_AddRefed<MediaDecoder>

dom/media/DecoderTraits.h

@@ -16,6 +16,7 @@ namespace mozilla {
 
 class AbstractMediaDecoder;
 class DecoderDoctorDiagnostics;
+class MediaContentType;
 class MediaDecoder;
 class MediaDecoderOwner;
 class MediaDecoderReader;
@@ -28,6 +29,10 @@ enum CanPlayStatus {
 
 class DecoderTraits {
 public:
+  // Returns the CanPlayStatus indicating if we can handle this content type.
+  static CanPlayStatus CanHandleContentType(const MediaContentType& aContentType,
+                                            DecoderDoctorDiagnostics* aDiagnostics);
+
   // Returns the CanPlayStatus indicating if we can handle this
   // MIME type. The MIME type should not include the codecs parameter.
   // That parameter should be passed in aRequestedCodecs, and will only be