func main() {
w := new(wav.Wav)
w.Channels = 1
w.SamplesPerSecond = 44100
w.Samples[wav.Mono] = make([]wav.Sample8, w.SamplesPerSecond*5)
// put in a square wave
halfWave := 1000
high := wav.Sample8(255)
low := wav.Sample8(0)
value := low
for i := 0; i < len(w.Samples[wav.Mono]); i++ {
if i%halfWave == 0 {
if halfWave > 10 {
halfWave -= 1
}
if value == low {
value = high
} else {
value = low
}
}
w.Samples[wav.Mono][i] = value
}
w.Write(os.Stdout)
}
func (f *Frame) RenderTo8Bit(out []wav.Sample8) {
if len(out) != len(f) {
panic("mismatched buffers")
}
for i := 0; i < len(f); i++ {
in := f[i]
// clip at [-1.0, 1.0]
if in > 1.0 {
in = 1.0
}
if in < -1.0 {
in = -1.0
}
if in == 1.0 {
// special case because 1.0 -> 0 otherwise (due to overflow)
out[i] = 255
} else {
out[i] = wav.Sample8((in + 1) / 2 * 256)
}
}
}
