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ilst.go
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ilst.go
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package mp4
import (
"io"
)
// IlstBox - iTunes Metadata Item List Atom (ilst)
// See https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/Metadata/Metadata.html
type IlstBox struct {
Children []Box
}
// AddChild - Add a child box and update SampleCount
func (s *IlstBox) AddChild(child Box) {
s.Children = append(s.Children, child)
}
// DecodeIlst - box-specific decode
func DecodeIlst(hdr *boxHeader, startPos uint64, r io.Reader) (Box, error) {
children, err := DecodeContainerChildren(hdr, startPos+8, startPos+hdr.size, r)
if err != nil {
return nil, err
}
b := &IlstBox{}
for _, c := range children {
b.AddChild(c)
}
return b, nil
}
// Type - box-specific type
func (s *IlstBox) Type() string {
return "ilst"
}
// Size - box-specific type
func (b *IlstBox) Size() uint64 {
return containerSize(b.Children)
}
// GetChildren - list of child boxes
func (b *IlstBox) GetChildren() []Box {
return b.Children
}
// Encode - box-specific encode of stsd - not a usual container
func (b *IlstBox) Encode(w io.Writer) error {
err := EncodeHeader(b, w)
if err != nil {
return err
}
for _, c := range b.Children {
err = c.Encode(w)
if err != nil {
return err
}
}
return nil
}
func (b *IlstBox) Info(w io.Writer, specificBoxLevels, indent, indentStep string) error {
return ContainerInfo(b, w, specificBoxLevels, indent, indentStep)
}