first commit

format/mp4f/fd.go

@@ -0,0 +1,30 @@
+package mp4f
+
+import "github.com/deepch/vdk/format/mp4/mp4io"
+
+type FDummy struct {
+	Data []byte
+	Tag_ mp4io.Tag
+	mp4io.AtomPos
+}
+
+func (self FDummy) Children() []mp4io.Atom {
+	return nil
+}
+
+func (self FDummy) Tag() mp4io.Tag {
+	return self.Tag_
+}
+
+func (self FDummy) Len() int {
+	return len(self.Data)
+}
+
+func (self FDummy) Marshal(b []byte) int {
+	copy(b, self.Data)
+	return len(self.Data)
+}
+
+func (self FDummy) Unmarshal(b []byte, offset int) (n int, err error) {
+	return
+}