fq/format/id3/id3v11.go

package id3

import (
	"github.com/wader/fq/format"
	"github.com/wader/fq/pkg/decode"
	"github.com/wader/fq/pkg/interp"
	"github.com/wader/fq/pkg/scalar"
)

func init() {
	interp.RegisterFormat(decode.Format{
		Name:        format.ID3V11,
		Description: "ID3v1.1 metadata",
		DecodeFn:    id3v11Decode,
	})
}

func id3v11Decode(d *decode.D) any {
	d.AssertAtLeastBitsLeft(128 * 8)
	d.FieldUTF8("magic", 4, d.StrAssert("TAG+"))
	d.FieldUTF8("title", 60)
	d.FieldUTF8("artist", 60)
	d.FieldUTF8("album", 60)
	d.FieldU8("speed", scalar.UintMapSymStr{
		0: "unset",
		1: "slow",
		2: "medium",
		3: "fast",
		4: "hardcore",
	})
	d.FieldUTF8("genre", 30)
	d.FieldUTF8("start", 6)
	d.FieldUTF8("stop", 6)

	return nil
}