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2fc0a71a47
Move scalar into own package. Split scalar code into decode related scalar code (that reads etc) and scalar code that just transform the scalar value. Use a scalar.Mapper interface instead of just a function. Make mappers, assert and validat impement the interface.
37 lines
739 B
Go
37 lines
739 B
Go
package id3
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import (
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"github.com/wader/fq/format"
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"github.com/wader/fq/format/registry"
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"github.com/wader/fq/pkg/decode"
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"github.com/wader/fq/pkg/scalar"
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)
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func init() {
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registry.MustRegister(decode.Format{
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Name: format.ID3V11,
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Description: "ID3v1.1 metadata",
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DecodeFn: id3v11Decode,
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})
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}
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func id3v11Decode(d *decode.D, in interface{}) interface{} {
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d.AssertAtLeastBitsLeft(128 * 8)
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d.FieldUTF8("magic", 4, d.AssertStr("TAG+"))
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d.FieldUTF8("title", 60)
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d.FieldUTF8("artist", 60)
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d.FieldUTF8("album", 60)
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d.FieldU8("speed", scalar.UToSymStr{
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0: "unset",
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1: "slow",
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2: "medium",
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3: "fast",
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4: "hardcore",
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})
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d.FieldUTF8("genre", 30)
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d.FieldUTF8("start", 6)
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d.FieldUTF8("stop", 6)
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return nil
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}
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