func BenchmarkSong(b *testing.B) {
s := song.New(song.Tempo(1.0))
s.AddAfter(note.Note{Note: note.E, Octave: 4}, note.Full)
ks := Song{
Song: s,
SamplingRate: 44100,
}
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
ks.Sound(FakeWriter{})
}
}
func New(r io.Reader) Hasher {
buf := make([]byte, 16)
r.Read(buf)
speed := song.Slow + song.Tempo(float64(buf[0])/256)
scl := scaleMap[int(buf[1])%4]
var sum int
for i := 1; i < len(buf); i++ {
sum += int(buf[i])
}
nt := note.Note{Note: note.C, Octave: 1}.AddHalfSteps(sum % 36)
s := song.New(speed)
s.Scale = scl.New(nt, buf[2]%2 == 0)
return Hasher{
Song: &s,
r: r,
}
}