// toError returns an error string from the mpg123 integer numeral.
func toError(e C.int) error {
if e == C.MPG123_OK {
return nil
}
s := C.mpg123_plain_strerror(e)
err := errors.New(C.GoString(s))
return err
}
// Create a new mpg123 decoder instance
func NewDecoder(decoder string) (*Decoder, error) {
var err C.int
var mh *C.mpg123_handle
if decoder != "" {
mh = C.mpg123_new(nil, &err)
} else {
cdecoder := C.CString(decoder)
defer C.free(unsafe.Pointer(cdecoder))
mh = C.mpg123_new(cdecoder, &err)
}
if mh == nil {
errstring := C.mpg123_plain_strerror(err)
defer C.free(unsafe.Pointer(errstring))
return nil, fmt.Errorf("Error initializing mpg123 decoder: %s", errstring)
}
dec := new(Decoder)
dec.handle = mh
return dec, nil
}
func mpg123PlainStrError(errcode C.int) string {
return C.GoString(C.mpg123_plain_strerror(errcode))
}