Ignore matroska projection metadata

Warn instead of fail parsing.

Closes #932.

packager/media/formats/webm/webm_constants.h

@@ -159,6 +159,8 @@ const int kWebMIdPosition = 0xA7;
 const int kWebMIdPrevFilename = 0x3C83AB;
 const int kWebMIdPrevSize = 0xAB;
 const int kWebMIdPrevUID = 0x3CB923;
+const int kWebMIdProjection = 0x7670;
+const int kWebMIdProjectionType = 0x7671;
 const int kWebMIdReferenceBlock = 0xFB;
 const int kWebMIdReferencePriority = 0xFA;
 const int kWebMIdSamplingFrequency = 0xB5;

packager/media/formats/webm/webm_parser.cc

@@ -198,6 +198,7 @@ static const ElementIdInfo kVideoIds[] = {
   {BINARY, kWebMIdColorSpace},
   {FLOAT, kWebMIdFrameRate},
   {LIST, kWebMIdColor},
+  {LIST, kWebMIdProjection},
 };
 
 static const ElementIdInfo kColorIds[] = {
@@ -217,6 +218,10 @@ static const ElementIdInfo kColorIds[] = {
   {LIST, kWebMIdColorMasteringMetadata},
 };
 
+static const ElementIdInfo kProjectionIds[] = {
+    {UINT, kWebMIdProjectionType},
+};
+
 static const ElementIdInfo kAudioIds[] = {
   {FLOAT, kWebMIdSamplingFrequency},
   {FLOAT, kWebMIdOutputSamplingFrequency},
@@ -401,6 +406,7 @@ static const ListElementInfo kListElementInfo[] = {
   LIST_ELEMENT_INFO(kWebMIdTrackTranslate, 3, kTrackTranslateIds),
   LIST_ELEMENT_INFO(kWebMIdVideo, 3, kVideoIds),
   LIST_ELEMENT_INFO(kWebMIdColor, 4, kColorIds),
+  LIST_ELEMENT_INFO(kWebMIdProjection, 4, kProjectionIds),
   LIST_ELEMENT_INFO(kWebMIdAudio, 3, kAudioIds),
   LIST_ELEMENT_INFO(kWebMIdTrackOperation, 3, kTrackOperationIds),
   LIST_ELEMENT_INFO(kWebMIdTrackCombinePlanes, 4, kTrackCombinePlanesIds),

packager/media/formats/webm/webm_video_client.cc

@@ -161,11 +161,15 @@ VPCodecConfigurationRecord WebMVideoClient::GetVpCodecConfig(
 }
 
 WebMParserClient* WebMVideoClient::OnListStart(int id) {
-  return id == kWebMIdColor ? this : WebMParserClient::OnListStart(id);
+  return id == kWebMIdColor || id == kWebMIdProjection
+             ? this
+             : WebMParserClient::OnListStart(id);
 }
 
 bool WebMVideoClient::OnListEnd(int id) {
-  return id == kWebMIdColor ? true : WebMParserClient::OnListEnd(id);
+  return id == kWebMIdColor || id == kWebMIdProjection
+             ? true
+             : WebMParserClient::OnListEnd(id);
 }
 
 bool WebMVideoClient::OnUInt(int id, int64_t val) {
@@ -233,6 +237,9 @@ bool WebMVideoClient::OnUInt(int id, int64_t val) {
     case kWebMIdColorMaxFALL:
       NOTIMPLEMENTED() << "HDR is not supported yet.";
       return true;
+    case kWebMIdProjectionType:
+      LOG(WARNING) << "Ignoring ProjectionType with value " << val;
+      return true;
     default:
       return true;
   }