func main() {
ifilename := flag.String("i", "input.wav", "Input filename")
flag.Parse()
file, err := os.Open(*ifilename)
if err != nil {
log.Fatal(err)
}
defer file.Close()
// Read wav data
w, werr := wav.ReadWav(file)
if werr != nil {
log.Fatal(werr)
}
input := w.GetMonoData()
sampleRate := int(w.SampleRate)
// Synthesis
outfile := strings.Replace(*ifilename, ".wav", "_synthesized.wav", -1)
start := time.Now()
synthesized := worldExample(input, sampleRate)
fmt.Println("Elapsed time in re-synthesis:", time.Now().Sub(start))
// Write to file
werr = wav.WriteMono(outfile, synthesized, w.SampleRate)
if werr != nil {
log.Fatal(werr)
}
fmt.Println(outfile, "is created.")
}
func ReadWav(filename string) (*wav.Wav, error) {
file, err := os.Open(filename)
if err != nil {
return nil, err
}
defer file.Close()
w, werr := wav.ReadWav(file)
if werr != nil {
return nil, werr
}
return w, nil
}
func TestMGLSAConsistencyWithSPTK(t *testing.T) {
var (
testData []float64
order = 25
alpha = 0.41
stage = 12
gamma = -1.0 / float64(stage)
)
file, err := os.Open("../test_files/test16k.wav")
if err != nil {
log.Fatal(err)
}
defer file.Close()
w, werr := wav.ReadWav(file)
if werr != nil {
log.Fatal(werr)
}
testData = w.GetMonoData()
data := testData[:512]
mgc := mgcep.MGCep(window.BlackmanNormalized(data), order, alpha, gamma)
filterCoef := MGCep2MGLSAFilterCoef(mgc, alpha, gamma)
mf := NewMGLSAFilter(order, alpha, stage)
// tricky allocation based on the SPTK (just for test)
d := make([]float64, (order+1)*stage)
tolerance := 1.0e-64
for _, val := range data {
y1 := mf.Filter(val, filterCoef)
y2 := sptk.MGLSADF(val, filterCoef, order, alpha, stage, d)
err := math.Abs(y1 - y2)
if err > tolerance {
t.Errorf("Error: %f, want less than %f.", err, tolerance)
}
}
}