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kind.go
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kind.go
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package mp4
import (
"io"
"io/ioutil"
)
// KindBox - Track Kind Box
type KindBox struct {
SchemeURI string
Value string
}
// DecodeKind - box-specific decode
func DecodeKind(hdr *boxHeader, startPos uint64, r io.Reader) (Box, error) {
data, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
s := NewSliceReader(data)
schemeURI, err := s.ReadZeroTerminatedString()
if err != nil {
return nil, err
}
value, err := s.ReadZeroTerminatedString()
if err != nil {
return nil, err
}
b := &KindBox{
SchemeURI: schemeURI,
Value: value,
}
return b, nil
}
// Type - box type
func (b *KindBox) Type() string {
return "kind"
}
// Size - calculated size of box
func (b *KindBox) Size() uint64 {
return uint64(boxHeaderSize + len(b.SchemeURI) + 1 + len(b.Value) + 1)
}
// Encode - write box to w
func (b *KindBox) Encode(w io.Writer) error {
err := EncodeHeader(b, w)
if err != nil {
return err
}
buf := makebuf(b)
sw := NewSliceWriter(buf)
sw.WriteString(b.SchemeURI, true)
sw.WriteString(b.Value, true)
_, err = w.Write(buf)
return err
}
func (b *KindBox) Info(w io.Writer, specificBoxLevels, indent, indentStep string) error {
bd := newInfoDumper(w, indent, b, -1, 0)
bd.write(" - schemeURI: %s", b.SchemeURI)
bd.write(" - value: %s", b.Value)
return bd.err
}