/
Track.go
62 lines (58 loc) · 1.21 KB
/
Track.go
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package sofia
import (
"errors"
"io"
)
// ISO/IEC 14496-12
// aligned(8) class TrackBox extends Box('trak') {
// }
type Track struct {
BoxHeader BoxHeader
Boxes []Box
Media Media
}
func (t *Track) read(r io.Reader, size int64) error {
r = io.LimitReader(r, size)
for {
var head BoxHeader
err := head.read(r)
if err == io.EOF {
return nil
} else if err != nil {
return err
}
switch head.debug() {
case "mdia":
_, size := head.get_size()
t.Media.BoxHeader = head
err := t.Media.read(r, size)
if err != nil {
return err
}
case "edts", // Paramount
"tkhd", // Roku
"udta": // Mubi
b := Box{BoxHeader: head}
err := b.read(r)
if err != nil {
return err
}
t.Boxes = append(t.Boxes, b)
default:
return errors.New("Track.read")
}
}
}
func (t Track) write(w io.Writer) error {
err := t.BoxHeader.write(w)
if err != nil {
return err
}
for _, each := range t.Boxes {
err := each.write(w)
if err != nil {
return err
}
}
return t.Media.write(w)
}