mirror of
https://github.com/langhuihui/monibuca.git
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60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
package box
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import (
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"encoding/binary"
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"io"
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)
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// aligned(8) class SyncSampleBox extends FullBox('stss', version = 0, 0) {
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// unsigned int(32) entry_count;
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// int i;
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// for (i=0; i < entry_count; i++) {
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// unsigned int(32) sample_number;
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// }
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// }
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type STSSBox struct {
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FullBox
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Entries []uint32
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}
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func CreateSTSSBox(entries []uint32) *STSSBox {
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return &STSSBox{
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FullBox: FullBox{
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BaseBox: BaseBox{
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typ: TypeSTSS,
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size: uint32(FullBoxLen + 4 + len(entries)*4),
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},
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},
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Entries: entries,
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}
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}
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func (box *STSSBox) WriteTo(w io.Writer) (n int64, err error) {
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buf := make([]byte, 4*(len(box.Entries)+1))
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// Write entry count
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binary.BigEndian.PutUint32(buf[:4], uint32(len(box.Entries)))
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// Write entries
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for i, sampleNumber := range box.Entries {
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binary.BigEndian.PutUint32(buf[4+i*4:], sampleNumber)
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}
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_, err = w.Write(buf)
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return int64(len(buf)), err
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}
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func (box *STSSBox) Unmarshal(buf []byte) (IBox, error) {
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entryCount := binary.BigEndian.Uint32(buf[:4])
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box.Entries = make([]uint32, entryCount)
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idx := 4
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for i := 0; i < int(entryCount); i++ {
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box.Entries[i] = binary.BigEndian.Uint32(buf[idx:])
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idx += 4
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}
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return box, nil
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}
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func init() {
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RegisterBox[*STSSBox](TypeSTSS)
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}
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