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package rtaudio
import (
"log"
"math"
"time"
)
func ExampleCompiledAPI() {
log.Println("RtAudio version: ", Version())
for _, api := range CompiledAPI() {
log.Println("Compiled API: ", api)
}
}
func ExampleRtAudio_Devices() {
audio, err := Create(APIUnspecified)
if err != nil {
log.Fatal(err)
}
defer audio.Destroy()
devices, err := audio.Devices()
if err != nil {
log.Fatal(err)
}
for _, d := range devices {
log.Printf("Audio device: %#v\n", d)
}
}
func ExampleRtAudio_Open() {
const (
sampleRate = 44100
bufSz = 512
freq = 440.0
)
phase := 0.0
audio, err := Create(APIUnspecified)
if err != nil {
log.Fatal(err)
}
defer audio.Destroy()
params := StreamParams{
DeviceID: uint(audio.DefaultOutputDevice()),
NumChannels: 2,
FirstChannel: 0,
}
options := StreamOptions{
Flags: FlagsAlsaUseDefault,
}
cb := func(out, in Buffer, dur time.Duration, status StreamStatus) int {
samples := out.Float32()
for i := 0; i < len(samples)/2; i++ {
sample := float32(math.Sin(2 * math.Pi * phase))
phase += freq / sampleRate
samples[i*2] = sample
samples[i*2+1] = sample
}
return 0
}
err = audio.Open(¶ms, nil, FormatFloat32, sampleRate, bufSz, cb, &options)
if err != nil {
log.Fatal(err)
}
defer audio.Close()
audio.Start()
defer audio.Stop()
time.Sleep(3 * time.Second)
}
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