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sinf.go
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sinf.go
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package mp4
import (
"io"
)
// SchiBox - Protection Scheme Information Box
type SinfBox struct {
Frma *FrmaBox // Mandatory
Schm *SchmBox // Optional
Schi *SchiBox // Optional
Children []Box
}
// AddChild - Add a child box
func (b *SinfBox) AddChild(box Box) {
switch box.Type() {
case "frma":
b.Frma = box.(*FrmaBox)
case "schm":
b.Schm = box.(*SchmBox)
case "schi":
b.Schi = box.(*SchiBox)
}
b.Children = append(b.Children, box)
}
// DecodeSinf - box-specific decode
func DecodeSinf(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 := &SinfBox{}
for _, child := range children {
b.AddChild(child)
}
return b, nil
}
// Type - box type
func (b *SinfBox) Type() string {
return "sinf"
}
// Size - calculated size of box
func (b *SinfBox) Size() uint64 {
return containerSize(b.Children)
}
// GetChildren - list of child boxes
func (b *SinfBox) GetChildren() []Box {
return b.Children
}
// Encode - write minf container to w
func (b *SinfBox) Encode(w io.Writer) error {
return EncodeContainer(b, w)
}
func (b *SinfBox) Info(w io.Writer, specificBoxLevels, indent, indentStep string) error {
return ContainerInfo(b, w, specificBoxLevels, indent, indentStep)
}