Continue implement case !IsReducedStillPictureHeader in ReadUncompressedFrameHeader()

src/ImageSharp/Formats/Heif/Av1/OpenBitstreamUnit/ObuReader.cs

@@ -894,7 +894,6 @@ internal class ObuReader
             if (frameInfo.ShowExistingFrame)
             {
                 frameInfo.FrameToShowMapIdx = reader.ReadLiteral(3);
-            }
 
                 if (sequenceHeader.DecoderModelInfoPresentFlag && sequenceHeader.TimingInfo?.EqualPictureInterval == false)
                 {
@@ -902,16 +901,44 @@ internal class ObuReader
                     frameInfo.FramePresentationTime = reader.ReadLiteral((int)sequenceHeader!.DecoderModelInfo!.FramePresentationTimeLength);
                 }
 
-            // int refreshFrameFlags = 0;
                 if (sequenceHeader.IsFrameIdNumbersPresent)
                 {
                     frameInfo.DisplayFrameId = reader.ReadLiteral(idLength);
                 }
 
-            // TODO: This is incomplete here, not sure how we can display an already decoded frame here.
+                // TODO: This is incomplete here, not sure how we can display an already decoded frame here or if this is really relevent for still pictures.
                 throw new NotImplementedException("ShowExistingFrame is not yet implemented");
             }
 
+            frameInfo.FrameType = (ObuFrameType)reader.ReadLiteral(2);
+            bool frameIsIntra = frameInfo.FrameType is ObuFrameType.IntraOnlyFrame or ObuFrameType.KeyFrame;
+            frameInfo.ShowFrame = reader.ReadBoolean();
+
+            if (frameInfo.ShowFrame && !sequenceHeader.DecoderModelInfoPresentFlag && sequenceHeader.TimingInfo?.EqualPictureInterval == false)
+            {
+                // 5.9.31. Temporal point info syntax.
+                frameInfo.FramePresentationTime = reader.ReadLiteral((int)sequenceHeader!.DecoderModelInfo!.FramePresentationTimeLength);
+            }
+
+            if (frameInfo.ShowFrame)
+            {
+                frameInfo.ShowableFrame = frameInfo.FrameType != ObuFrameType.KeyFrame;
+            }
+            else
+            {
+                frameInfo.ShowableFrame = reader.ReadBoolean();
+            }
+
+            if (frameInfo.FrameType == ObuFrameType.SwitchFrame || (frameInfo.FrameType == ObuFrameType.KeyFrame && frameInfo.ShowFrame))
+            {
+                frameInfo.ErrorResilientMode = true;
+            }
+            else
+            {
+                frameInfo.ErrorResilientMode = reader.ReadBoolean();
+            }
+        }
+
         if (frameInfo.FrameType == ObuFrameType.KeyFrame && frameInfo.ShowFrame)
         {
             frameInfo.ReferenceValid = new bool[Av1Constants.ReferenceFrameCount];
@@ -1080,6 +1107,10 @@ internal class ObuReader
         {
             frameInfo.DisableFrameEndUpdateCdf = true;
         }
+        else
+        {
+            frameInfo.DisableFrameEndUpdateCdf = reader.ReadBoolean();
+        }
 
         if (frameInfo.PrimaryReferenceFrame == Av1Constants.PrimaryReferenceFrameNone)
         {