Bug 1394591 - P6. Simplify some internal codec mimetype. r=gerald

The codec mimetype is now shown in the media devtools. May as well make it readable.

MozReview-Commit-ID: 6rccDiTR24m

--HG--
extra : rebase_source : 7b8d1da8f05d0c46d5fd57b5e604ec3aed36a5f2

dom/media/platforms/agnostic/AOMDecoder.cpp

@@ -309,8 +309,7 @@ AOMDecoder::Drain()
 bool
 AOMDecoder::IsAV1(const nsACString& aMimeType)
 {
-  return aMimeType.EqualsLiteral("video/webm; codecs=av1")
-         || aMimeType.EqualsLiteral("video/av1");
+  return aMimeType.EqualsLiteral("video/av1");
 }
 
 /* static */

dom/media/platforms/agnostic/VPXDecoder.cpp

@@ -25,10 +25,8 @@ using namespace layers;
 
 static VPXDecoder::Codec MimeTypeToCodec(const nsACString& aMimeType)
 {
-  if (aMimeType.EqualsLiteral("video/webm; codecs=vp8")) {
+  if (aMimeType.EqualsLiteral("video/vp8")) {
     return VPXDecoder::Codec::VP8;
-  } else if (aMimeType.EqualsLiteral("video/webm; codecs=vp9")) {
-    return VPXDecoder::Codec::VP9;
   } else if (aMimeType.EqualsLiteral("video/vp9")) {
     return VPXDecoder::Codec::VP9;
   }
@@ -288,9 +286,7 @@ bool
 VPXDecoder::IsVPX(const nsACString& aMimeType, uint8_t aCodecMask)
 {
   return ((aCodecMask & VPXDecoder::VP8)
-          && aMimeType.EqualsLiteral("video/webm; codecs=vp8"))
-         || ((aCodecMask & VPXDecoder::VP9)
-             && aMimeType.EqualsLiteral("video/webm; codecs=vp9"))
+          && aMimeType.EqualsLiteral("video/vp8"))
          || ((aCodecMask & VPXDecoder::VP9)
              && aMimeType.EqualsLiteral("video/vp9"));
 }

dom/media/webm/WebMDemuxer.cpp

@@ -323,13 +323,13 @@ WebMDemuxer::ReadMetadata()
       mVideoCodec = nestegg_track_codec_id(context, track);
       switch(mVideoCodec) {
         case NESTEGG_CODEC_VP8:
-          mInfo.mVideo.mMimeType = "video/webm; codecs=vp8";
+          mInfo.mVideo.mMimeType = "video/vp8";
           break;
         case NESTEGG_CODEC_VP9:
-          mInfo.mVideo.mMimeType = "video/webm; codecs=vp9";
+          mInfo.mVideo.mMimeType = "video/vp9";
           break;
         case NESTEGG_CODEC_AV1:
-          mInfo.mVideo.mMimeType = "video/webm; codecs=av1";
+          mInfo.mVideo.mMimeType = "video/av1";
           break;
         default:
           NS_WARNING("Unknown WebM video codec");

media/webrtc/signaling/src/media-conduit/WebrtcMediaDataDecoderCodec.cpp

@@ -36,10 +36,10 @@ WebrtcMediaDataDecoder::InitDecode(const webrtc::VideoCodec* aCodecSettings,
   nsCString codec;
   switch (aCodecSettings->codecType) {
     case webrtc::VideoCodecType::kVideoCodecVP8:
-      codec = "video/webm; codecs=vp8";
+      codec = "video/vp8";
       break;
     case webrtc::VideoCodecType::kVideoCodecVP9:
-      codec = "video/webm; codecs=vp9";
+      codec = "video/vp9";
       break;
     case webrtc::VideoCodecType::kVideoCodecH264:
       codec = "video/avc";