func main() {
bitrate := 705600 // get from the file
samplerate := 44100 // get from the file
info, err := os.Stat("good_times.wav")
Wav, err := os.Open("good_times.wav")
wavReader, err := wav.NewReader(Wav, info.Size())
checkErr(err)
var data []sample
i := uint64(0)
Loop:
for {
s, err := wavReader.ReadSample()
if err == io.EOF {
break Loop
} else if err != nil {
panic(err)
}
data = append(data, sample{x: float64(s), t: i})
i = i + 1
}
rebuildSound(kmeans(data, 50), i, bitrate, samplerate)
}
func main() {
if len(os.Args) != 2 {
fmt.Fprintf(os.Stderr, "Usage: simpleRead <file.wav>\n")
os.Exit(1)
}
testInfo, err := os.Stat(os.Args[1])
checkErr(err)
testWav, err := os.Open(os.Args[1])
checkErr(err)
wavReader, err := wav.NewReader(testWav, testInfo.Size())
checkErr(err)
fmt.Println("Hello, wav")
fmt.Println(wavReader)
sampleLoop:
for {
s, err := wavReader.ReadRawSample()
if err == io.EOF {
break sampleLoop
} else if err != nil {
panic(err)
}
fmt.Printf("Sample: <%v>\n", s)
}
}
func main() {
if len(os.Args) != 2 {
fmt.Fprintf(os.Stderr, "Usage: plotWav <file.wav>\n")
os.Exit(1)
}
// open file
testInfo, err := os.Stat(os.Args[1])
checkErr(err)
testWav, err := os.Open(os.Args[1])
checkErr(err)
wavReader, err := wav.NewReader(testWav, testInfo.Size())
checkErr(err)
// File informations
fmt.Println(wavReader)
// limit sample count
sampleCnt := wavReader.GetSampleCount()
if sampleCnt > 10000 {
sampleCnt = 10000
}
// setup plotter
p, err := plot.New()
checkErr(err)
p.Title.Text = "Waveplot"
p.X.Label.Text = "t"
p.Y.Label.Text = "Ampl"
pts := make(plotter.XYs, sampleCnt)
// read samples and construct points for plot
for i := range pts {
n, err := wavReader.ReadSample()
if err == io.EOF {
break
}
checkErr(err)
pts[i].X = float64(i)
pts[i].Y = float64(n)
}
err = plotutil.AddLinePoints(p, "", pts)
checkErr(err)
// construct output filename
inputFname := path.Base(os.Args[1])
plotFname := strings.Split(inputFname, ".")[0] + ".pdf"
if err := p.Save(10*vg.Inch, 4*vg.Inch, plotFname); err != nil {
panic(err)
}
}
// loadWavReaderOrPanic reads a wav file and handles failure cases.
func loadWavReaderOrPanic(path string) *wav.Reader {
testInfo, err := os.Stat(path)
if err != nil {
panic(err)
}
testWav, err := os.Open(path)
if err != nil {
panic(err)
}
result, err := wav.NewReader(testWav, testInfo.Size())
if err != nil {
panic(err)
}
return result
}