mirror of
https://github.com/langhuihui/monibuca.git
synced 2025-12-24 13:48:04 +08:00
54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
package box
|
||
|
||
import (
|
||
"encoding/binary"
|
||
"io"
|
||
)
|
||
|
||
// aligned(8) class SyncSampleBox extends FullBox(‘stss’, version = 0, 0) {
|
||
// unsigned int(32) entry_count;
|
||
// int i;
|
||
// for (i=0; i < entry_count; i++) {
|
||
// unsigned int(32) sample_number;
|
||
// }
|
||
// }
|
||
|
||
type SyncSampleBox []uint32
|
||
|
||
func (stss SyncSampleBox) Encode() (int, []byte) {
|
||
fullbox := NewFullBox(TypeSTSS, 0)
|
||
fullbox.Box.Size = FullBoxLen + 4 + 4*uint64(len(stss))
|
||
offset, buf := fullbox.Encode()
|
||
binary.BigEndian.PutUint32(buf[offset:], uint32(len(stss)))
|
||
offset += 4
|
||
for _, sampleNumber := range stss {
|
||
binary.BigEndian.PutUint32(buf[offset:], sampleNumber)
|
||
offset += 4
|
||
}
|
||
return offset, buf
|
||
}
|
||
|
||
func (stss *SyncSampleBox) Decode(r io.Reader) (offset int, err error) {
|
||
var fullbox FullBox
|
||
if _, err = fullbox.Decode(r); err != nil {
|
||
return
|
||
}
|
||
tmp := make([]byte, 4)
|
||
if _, err = io.ReadFull(r, tmp); err != nil {
|
||
return
|
||
}
|
||
offset = 8
|
||
entryCount := binary.BigEndian.Uint32(tmp[:])
|
||
buf := make([]byte, entryCount*4)
|
||
if _, err = io.ReadFull(r, buf); err != nil {
|
||
return
|
||
}
|
||
idx := 0
|
||
for range entryCount {
|
||
*stss = append(*stss, binary.BigEndian.Uint32(buf[idx:]))
|
||
idx += 4
|
||
}
|
||
offset += idx
|
||
return
|
||
}
|