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fq/format/mpeg/avc_au.go

41 lines
844 B
Go

package mpeg
// ISO/IEC 14496-15, 5.3.3.1.2 Syntax
import (
"github.com/wader/fq/format"
"github.com/wader/fq/format/registry"
"github.com/wader/fq/pkg/decode"
)
var avcNALUFormat decode.Group
func init() {
registry.MustRegister(decode.Format{
Name: format.AVC_AU,
Description: "H.264/AVC Access Unit",
DecodeFn: avcAUDecode,
RootArray: true,
RootName: "access_unit",
Dependencies: []decode.Dependency{
{Names: []string{format.AVC_NALU}, Group: &avcNALUFormat},
},
})
}
func avcAUDecode(d *decode.D, in interface{}) interface{} {
avcIn, ok := in.(format.AvcIn)
if !ok {
d.Fatalf("avcIn required")
}
for d.NotEnd() {
d.FieldStruct("nalu", func(d *decode.D) {
l := d.FieldU("length", int(avcIn.LengthSize)*8)
d.FieldFormatLen("nalu", int64(l)*8, avcNALUFormat, nil)
})
}
return nil
}