test: test that CoLL and SmDm boxes are handled inside vp09

CHANGELOG.md

@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Lots of fuzzying tests and changes to avoid panic on bad input data
 - Support for SMPTE-2086 Mastering Display Metadata Box (SmDm)
 - Support for Content Light Level Box (CoLL)
+- Test for CoLL and SmDM inside vp09 box
 
 ### Fixed
 

mp4/visualsampleentry.go

@@ -27,6 +27,7 @@ type VisualSampleEntryBox struct {
 	Pasp               *PaspBox
 	Sinf               *SinfBox
 	SmDm               *SmDmBox
+	CoLL               *CoLLBox
 	Children           []Box
 }
 
@@ -77,6 +78,8 @@ func (b *VisualSampleEntryBox) AddChild(child Box) {
 		b.Sinf = box
 	case *SmDmBox:
 		b.SmDm = box
+	case *CoLLBox:
+		b.CoLL = box
 	}
 	b.Children = append(b.Children, child)
 }

mp4/vppc.go

@@ -70,8 +70,9 @@ func DecodeVppCSR(hdr BoxHeader, startPos uint64, sr bits.SliceReader) (Box, err
 	if hdr.Size != b.expectedSize(codecInitSize) {
 		return nil, fmt.Errorf("incorrect box size")
 	}
-	b.CodecInitData = sr.ReadBytes(int(codecInitSize))
-
+	if codecInitSize != 0 {
+		b.CodecInitData = sr.ReadBytes(int(codecInitSize))
+	}
 	return &b, sr.AccError()
 }