forked from Eyevinn/mp4ff
-
Notifications
You must be signed in to change notification settings - Fork 1
/
frma.go
51 lines (44 loc) · 1.03 KB
/
frma.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
package mp4
import (
"fmt"
"io"
"io/ioutil"
)
// FrmaBox - Original Format Box
type FrmaBox struct {
DataFormat string // uint32 - original box type
}
// DecodeSaio - box-specific decode
func DecodeFrma(hdr *boxHeader, startPos uint64, r io.Reader) (Box, error) {
data, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
if len(data) != 4 {
return nil, fmt.Errorf("Frma content length is not 4")
}
return &FrmaBox{DataFormat: string(data)}, nil
}
// Type - return box type
func (b *FrmaBox) Type() string {
return "frma"
}
// Size - return calculated size
func (b *FrmaBox) Size() uint64 {
return 12
}
// Encode - write box to w
func (b *FrmaBox) Encode(w io.Writer) error {
err := EncodeHeader(b, w)
if err != nil {
return err
}
_, err = w.Write([]byte(b.DataFormat))
return err
}
// Info - write box info to w
func (b *FrmaBox) Info(w io.Writer, specificBoxLevels, indent, indentStep string) (err error) {
bd := newInfoDumper(w, indent, b, -1, 0)
bd.write(" - dataFormat: %s", b.DataFormat)
return bd.err
}