Add av1 to MediaSource.isTypeSupported

When av1 video playback is enabled, declare it as supported in the webm container in MediaSource.IsTypeSupported.

Also support special mime types of the form video/webm; codecs=vp9.experimental.<git-commit-id> so test sites can verify playback support of particular encodings while the av1 bitstream is under development.

2 files changed, 16 insertions, 0 deletions

diff --git a/dom/media/platforms/agnostic/AOMDecoder.cpp b/dom/media/platforms/agnostic/AOMDecoder.cpp
index 3ab5004e3..d1b45cf7f 100644
--- a/dom/media/platforms/agnostic/AOMDecoder.cpp
+++ b/dom/media/platforms/agnostic/AOMDecoder.cpp
@@ -212,6 +212,19 @@ AOMDecoder::IsAV1(const nsACString& aMimeType)
 
 /* static */
 bool
+AOMDecoder::IsSupportedCodec(const nsAString& aCodecType)
+{
+  // While AV1 is under development, we describe support
+  // for a specific aom commit hash so sites can check
+  // compatibility.
+  auto version = NS_ConvertASCIItoUTF16("av1.experimental.");
+  version.AppendLiteral("4d668d7feb1f8abd809d1bca0418570a7f142a36");
+  return aCodecType.EqualsLiteral("av1") ||
+         aCodecType.Equals(version);
+}
+
+/* static */
+bool
 AOMDecoder::IsKeyframe(Span<const uint8_t> aBuffer) {
   aom_codec_stream_info_t info;
   PodZero(&info);
diff --git a/dom/media/platforms/agnostic/AOMDecoder.h b/dom/media/platforms/agnostic/AOMDecoder.h
index ec6b1f95a..1e2b76c2c 100644
--- a/dom/media/platforms/agnostic/AOMDecoder.h
+++ b/dom/media/platforms/agnostic/AOMDecoder.h
@@ -34,6 +34,9 @@ public:
   // by our demuxers to identify AV1 streams.
   static bool IsAV1(const nsACString& aMimeType);
 
+  // Return true if aCodecType is a supported codec description.
+  static bool IsSupportedCodec(const nsAString& aCodecType);
+
   // Return true if a sample is a keyframe.
   static bool IsKeyframe(Span<const uint8_t> aBuffer);