Allow matroska mime types for video element and MSE

Allow avc (h.264) content in matroska/webm containers

dom/media/fmp4/MP4Decoder.cpp

@@ -180,7 +180,8 @@ bool
 MP4Decoder::IsH264(const nsACString& aMimeType)
 {
   return aMimeType.EqualsLiteral("video/mp4") ||
-         aMimeType.EqualsLiteral("video/avc");
+         aMimeType.EqualsLiteral("video/avc") ||
+	 aMimeType.EqualsLiteral("video/webm; codecs=avc1");
 }
 
 /* static */

dom/media/mediasource/ContainerParser.cpp

@@ -697,6 +697,9 @@ ContainerParser::CreateForMIMEType(const nsACString& aType)
   if (aType.LowerCaseEqualsLiteral("video/webm") || aType.LowerCaseEqualsLiteral("audio/webm")) {
     return new WebMContainerParser(aType);
   }
+  if (aType.LowerCaseEqualsLiteral("video/x-matroska")) {
+    return new WebMContainerParser(aType);
+  }
 
 #ifdef MOZ_FMP4
   if (aType.LowerCaseEqualsLiteral("video/mp4") || aType.LowerCaseEqualsLiteral("audio/mp4")) {

dom/media/mediasource/MediaSource.cpp

@@ -110,7 +110,8 @@ MediaSource::IsTypeSupported(const nsAString& aType, DecoderDoctorDiagnostics* a
     }
     return NS_OK;
   }
-  if (mimeType.EqualsASCII("video/webm")) {
+  if (mimeType.EqualsASCII("video/webm") ||
+      mimeType.EqualsASCII("video/x-matroska")) {
     if (!(Preferences::GetBool("media.mediasource.webm.enabled", false) ||
           IsWebMForced(aDiagnostics))) {
       return NS_ERROR_DOM_NOT_SUPPORTED_ERR;

dom/media/mediasource/TrackBuffersManager.cpp

@@ -814,6 +814,7 @@ TrackBuffersManager::CreateDemuxerforMIMEType()
   ShutdownDemuxers();
 
   if (mType.LowerCaseEqualsLiteral("video/webm") ||
+      mType.LowerCaseEqualsLiteral("video/x-matroska") ||
       mType.LowerCaseEqualsLiteral("audio/webm")) {
     mInputDemuxer = new WebMDemuxer(mCurrentInputBuffer, true /* IsMediaSource*/ );
     return;

dom/media/webm/WebMDecoder.cpp

@@ -41,7 +41,7 @@ WebMDecoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
   }
 
   const bool isWebMAudio = aMIMETypeExcludingCodecs.EqualsASCII("audio/webm");
-  const bool isWebMVideo = aMIMETypeExcludingCodecs.EqualsASCII("video/webm");
+  const bool isWebMVideo = aMIMETypeExcludingCodecs.EqualsASCII("video/webm") || aMIMETypeExcludingCodecs.EqualsASCII("video/x-matroska") ;
   if (!isWebMAudio && !isWebMVideo) {
     return false;
   }
@@ -74,6 +74,11 @@ WebMDecoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
       continue;
     }
 #endif
+
+    if (IsH264CodecString(codec)) {
+      continue;
+    }
+
     // Some unsupported codec.
     return false;
   }

dom/media/webm/WebMDemuxer.cpp

@@ -326,6 +326,20 @@ WebMDemuxer::ReadMetadata()
         case NESTEGG_CODEC_AV1:
           mInfo.mVideo.mMimeType = "video/webm; codecs=av1";
           break;
+        case NESTEGG_CODEC_AVC1: {
+          mInfo.mVideo.mMimeType = "video/webm; codecs=avc1";
+
+          unsigned char* data = 0;
+          size_t length = 0;
+          r = nestegg_track_codec_data(context, track, 0, &data, &length);
+          if (r == -1) {
+            return NS_ERROR_FAILURE;
+          }
+
+          mInfo.mVideo.mExtraData = new MediaByteBuffer(length);
+          mInfo.mVideo.mExtraData->AppendElements(data, length);
+          break;
+	}
         default:
           NS_WARNING("Unknown WebM video codec");
           return NS_ERROR_FAILURE;
@@ -662,6 +676,9 @@ WebMDemuxer::GetNextPacket(TrackInfo::TrackType aType, MediaRawDataQueue *aSampl
           isKeyframe = AOMDecoder::IsKeyframe(sample);
           break;
 #endif
+        case NESTEGG_CODEC_AVC1:
+         isKeyframe = nestegg_packet_has_keyframe(holder->Packet());
+           break;
         default:
           NS_WARNING("Cannot detect keyframes in unknown WebM video codec");
           return NS_ERROR_FAILURE;
@@ -749,6 +766,11 @@ WebMDemuxer::GetNextPacket(TrackInfo::TrackType aType, MediaRawDataQueue *aSampl
     if (aType == TrackInfo::kVideoTrack) {
       sample->mTrackInfo = mSharedVideoTrackInfo;
     }
+
+    if (mVideoCodec == NESTEGG_CODEC_AVC1) {
+      sample->mExtraData = mInfo.mVideo.mExtraData;
+    }
+
     aSamples->Push(sample);
   }
   return NS_OK;

media/libnestegg/include/nestegg.h

@@ -72,6 +72,7 @@ extern "C" {
 #define NESTEGG_CODEC_VP9     2       /**< Track uses Google On2 VP9 codec. */
 #define NESTEGG_CODEC_OPUS    3       /**< Track uses Xiph Opus codec. */
 #define NESTEGG_CODEC_AV1     4       /**< Track uses AOMedia AV1 codec. */
+#define NESTEGG_CODEC_AVC1    5       /**< Track uses AVC1 'h264' */
 #define NESTEGG_CODEC_UNKNOWN INT_MAX /**< Track uses unknown codec. */
 
 #define NESTEGG_VIDEO_MONO              0 /**< Track is mono video. */

media/libnestegg/src/nestegg.c

@@ -157,6 +157,7 @@ enum ebml_type_enum {
 #define TRACK_ID_AV1                "V_AV1"
 #define TRACK_ID_VORBIS             "A_VORBIS"
 #define TRACK_ID_OPUS               "A_OPUS"
+#define TRACK_ID_AVC1               "V_MPEG4/ISO/AVC"
 
 /* Track Encryption */
 #define CONTENT_ENC_ALGO_AES        5
@@ -2401,6 +2402,9 @@ nestegg_track_codec_id(nestegg * ctx, unsigned int track)
   if (strcmp(codec_id, TRACK_ID_OPUS) == 0)
     return NESTEGG_CODEC_OPUS;
 
+  if (strcmp(codec_id, TRACK_ID_AVC1) == 0)
+    return NESTEGG_CODEC_AVC1;
+
   return NESTEGG_CODEC_UNKNOWN;
 }
 
@@ -2459,7 +2463,8 @@ nestegg_track_codec_data(nestegg * ctx, unsigned int track, unsigned int item,
     return -1;
 
   if (nestegg_track_codec_id(ctx, track) != NESTEGG_CODEC_VORBIS &&
-      nestegg_track_codec_id(ctx, track) != NESTEGG_CODEC_OPUS)
+      nestegg_track_codec_id(ctx, track) != NESTEGG_CODEC_OPUS &&
+      nestegg_track_codec_id(ctx, track) != NESTEGG_CODEC_AVC1)
     return -1;
 
   if (ne_get_binary(entry->codec_private, &codec_private) != 0)