Golang portaudio.Initialize函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了Golang中code/google/com/p/portaudio-go/portaudio.Initialize函数的典型用法代码示例。如果您正苦于以下问题：Golang Initialize函数的具体用法？Golang Initialize怎么用？Golang Initialize使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了Initialize函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: main

func main() {
	flag.Parse()

	portaudio.Initialize()
	defer portaudio.Terminate()

	portmidi.Initialize()
	defer portmidi.Terminate()

	if *doDemo {
		if err := demo(); err != nil {
			log.Println(err)
		}
		return
	}

	http.Handle("/", http.FileServer(http.Dir("static")))
	http.HandleFunc("/socket", socketHandler)
	go func() {
		if err := http.ListenAndServe(*listenAddr, nil); err != nil {
			log.Println(err)
		}
	}()

	os.Stdout.Write([]byte("Press enter to stop...\n"))
	os.Stdin.Read([]byte{0})
}

开发者ID:rakyll，项目名称:sigourney，代码行数:27，代码来源:main.go

示例2: main

func main() {
	flag.Parse()

	sequencer := NewSequencer()

	for _, file := range flag.Args() {
		pattern, err := drum.DecodeFile(file)
		if err != nil {
			log.Fatal(err)
		}
		if err := sequencer.Add(pattern); err != nil {
			log.Fatal(err)
		}
		log.Print(pattern.String())
	}

	portaudio.Initialize()
	defer portaudio.Terminate()
	stream, err := portaudio.OpenDefaultStream(0, 2, 44100, 0, func(o []int32) {
		sequencer.Read(o)
	})
	if err != nil {
		log.Fatal(err)
	}
	defer stream.Close()
	stream.Start()
	defer stream.Stop()

	sequencer.Start()

	for {
		time.Sleep(time.Second)
	}
}

开发者ID:rubyist，项目名称:tdrum，代码行数:34，代码来源:player.go

示例3: NewSequencer

// NewSequencer creates and returns a pointer to a New Sequencer.
// Returns an error if there is one encountered
// During initializing portaudio, or the default stream
func NewSequencer() (*Sequencer, error) {
	err := portaudio.Initialize()
	if err != nil {
		return nil, err
	}

	s := &Sequencer{
		Timer: NewTimer(),
		Bar:   0,
		Beat:  0,
	}

	stream, err := portaudio.OpenDefaultStream(
		InputChannels,
		OutputChannels,
		float64(SampleRate),
		portaudio.FramesPerBufferUnspecified,
		s.ProcessAudio,
	)

	if err != nil {
		return nil, err
	}

	s.Stream = stream

	return s, nil
}

开发者ID:billyboar，项目名称:GCSolutions，代码行数:31，代码来源:sequencer.go

示例4: main

func main() {
	portaudio.Initialize()
	defer portaudio.Terminate()
	hs, err := portaudio.HostApis()
	chk(err)
	err = tmpl.Execute(os.Stdout, hs)
	chk(err)
}

开发者ID:krak3n，项目名称:portaudio-go，代码行数:8，代码来源:enumerate.go

示例5: init

func init() {
	err := pa.Initialize() // seems to be needed before doing other stuff with pa
	if err != nil {
		fmt.Printf("Error: %s\n", err)
		// os.Exit(1)
	}
	// defer pa.Terminate()
}

开发者ID:refola，项目名称:golang，代码行数:8，代码来源:input.go

示例6: main

func main() {
	sampleRate := 44100
	blockSize := 205 * sampleRate / 8000
	window := blockSize / 4
	dt := dtmf.NewStandard(sampleRate, blockSize)
	lastKey := -1
	keyCount := 0
	samples := make([]float32, blockSize)

	if err := portaudio.Initialize(); err != nil {
		log.Fatalf("Initialize: %+v", err)
	}
	defer func() {
		if err := portaudio.Terminate(); err != nil {
			log.Fatalf("Terminate: %+v", err)
		}
	}()
	inputBuf := make([]float32, window)
	stream, err := portaudio.OpenDefaultStream(1, 0, float64(sampleRate), len(inputBuf), inputBuf)
	if err != nil {
		log.Fatalf("OpenDefaultStream: %+v", err)
	}
	defer stream.Close()
	if err := stream.Start(); err != nil {
		log.Fatalf("Start: %+v", err)
	}
	defer stream.Stop()

	fmt.Printf("%+v\n", stream.Info())

	sig := make(chan os.Signal, 1)
	signal.Notify(sig, os.Interrupt, os.Kill)
	for {
		if err := stream.Read(); err != nil {
			log.Fatalf("Read: %+v", err)
		}

		copy(samples, samples[window:])
		copy(samples[len(samples)-len(inputBuf):], inputBuf)

		if k, t := dt.Feed(samples); k == lastKey && t > 0.0 {
			keyCount++
			if keyCount == 10 {
				fmt.Printf("%c", dtmf.Keypad[k])
			}
		} else {
			lastKey = k
			keyCount = 0
		}

		select {
		case <-sig:
			fmt.Println()
			return
		default:
		}
	}
}

开发者ID:joerocklin，项目名称:go-dsp，代码行数:58，代码来源:dtmf_live.go

示例7: Run

// Runs the sampler, commencing output to an audio device.
func (s *Sampler) Run() error {
	portaudio.Initialize()
	var err error
	s.stream, err = portaudio.OpenDefaultStream(0, 2, 44100, 0, s.processAudio)
	if err != nil {
		return err
	}
	return s.stream.Start()
}

开发者ID:lamproae，项目名称:audio-1，代码行数:10，代码来源:sampler.go

示例8: Play

// Play will play the given pattern.
// It will generate different sounds for each instrument
// every time it is called. For simplification, those sounds
// are just sine waves.
func (p *Pattern) Play(playingTime time.Duration) error {
	// Initialize portaudio
	portaudio.Initialize()
	defer portaudio.Terminate()

	stream, err := portaudio.OpenDefaultStream(0, 1, sampleRate, 0, processAudio)
	if err != nil {
		return errors.New("could not open default stream")
	}
	defer stream.Close()

	// Create random tone map
	toneMap = make(map[byte]*tone)
	rand.Seed(time.Now().Unix())
	for i := range p.instruments {
		var err error
		toneMap[i], err = newTone(rand.Float64()*600+300, sampleRate)
		if err != nil {
			return fmt.Errorf("could not create tone for instrument %v", i)
		}
	}

	stream.Start()
	defer stream.Stop()

	// Signal for stopping
	timeOut := time.After(playingTime)

	timePerStep := time.Duration(60/p.header.BPM*1000) * time.Millisecond
	ticker := time.NewTicker(timePerStep)
	currentStep := 0

	// Play!
	for _ = range ticker.C {
		for i, instrument := range p.instruments {
			if instrument.Pattern[currentStep] == 0 {
				toneMap[i].playing = false
			} else {
				toneMap[i].playing = true
			}
		}

		currentStep++
		if currentStep > 15 {
			currentStep = 0
		}

		select {
		case <-timeOut:
			ticker.Stop()
			return nil
		default:
		}
	}

	return nil
}

开发者ID:billyboar，项目名称:GCSolutions，代码行数:61，代码来源:player.go

示例9: main

func main() {
	portaudio.Initialize()
	defer portaudio.Terminate()
	e := newEcho(time.Second / 3)
	defer e.Close()
	chk(e.Start())
	time.Sleep(4 * time.Second)
	chk(e.Stop())
}

开发者ID:krak3n，项目名称:portaudio-go，代码行数:9，代码来源:echo.go

示例10: main

func main() {
	portaudio.Initialize()
	defer portaudio.Terminate()
	s := newStereoSine(256, 320, sampleRate)
	defer s.Close()
	chk(s.Start())
	time.Sleep(2 * time.Second)
	chk(s.Stop())
}

开发者ID:krak3n，项目名称:portaudio-go，代码行数:9，代码来源:stereoSine.go

示例11: sineLogon

func sineLogon() {
	portaudio.Initialize()
	defer portaudio.Terminate()
	s := newStereoSine(132, 198/2, sampleRate)
	defer s.Close()
	chk(s.Start())

	doADSR(s, 0.4, 0.1, 0.1)
	doADSR(s, 0.1, 0.8, 0.9)

	// wait for buffer to drain
	time.Sleep(500 * time.Millisecond)
	chk(s.Stop())
}

开发者ID:cfstras，项目名称:cfmedias，代码行数:14，代码来源:sineLogon.go

示例12: sineMain

func sineMain(ch *amqp.Channel) {

	go sniffy()
	q, err := ch.QueueDeclare(
		"",    // name
		false, // durable
		false, // delete when usused
		true,  // exclusive
		false, // no-wait
		nil,   // arguments
	)
	failOnError(err, "Failed to declare a queue")

	err = ch.QueueBind(
		q.Name, // queue name
		"",     // routing key
		"bpm",  // exchange
		false,
		nil)
	failOnError(err, "Failed to bind a queue")

	msgs, err := ch.Consume(
		q.Name, // queue
		"",     // consumer
		true,   // auto-ack
		false,  // exclusive
		false,  // no-local
		false,  // no-wait
		nil,    // args
	)
	failOnError(err, "Failed to register a consumer")

	portaudio.Initialize()
	defer portaudio.Terminate()
	//s := newStereoSine(256, 320, sampleRate)
	s := newStereoSine(220, 220, sampleRate)
	defer s.Close()
	chk(s.Start())
	defer s.Stop()

	for m := range msgs {
		var bm BpmMsg
		err := json.Unmarshal(m.Body, &bm)
		if err != nil {
			fmt.Println("blah", err)
		}
		bpm = bm.Bpm
	}
}

开发者ID:sideb0ard，项目名称:Craxx，代码行数:49，代码来源:sine.go

示例13: main

func main() {
	portaudio.Initialize()
	defer portaudio.Terminate()
	h, err := portaudio.DefaultHostApi()
	chk(err)
	stream, err := portaudio.OpenStream(portaudio.HighLatencyParameters(nil, h.DefaultOutputDevice), func(out []int32) {
		for i := range out {
			out[i] = int32(rand.Uint32())
		}
	})
	chk(err)
	defer stream.Close()
	chk(stream.Start())
	time.Sleep(time.Second)
	chk(stream.Stop())
}

开发者ID:krak3n，项目名称:portaudio-go，代码行数:16，代码来源:noise.go

示例14: InitAudio

// InitAudio starts up PortAudio, creates a stream and
// returns a pointer to an Audio struct, or an error.
func InitAudio() (*Audio, error) {
	a := Audio{
		tracks: make([]*Track, 0),
	}
	err := portaudio.Initialize()
	if err != nil {
		return nil, err
	}
	stream, err := portaudio.OpenDefaultStream(
		0, 2, float64(44100), 0, a.playCallback,
	)
	if err != nil {
		return nil, err
	}
	a.stream = stream
	a.stream.Start()
	return &a, nil
}

开发者ID:XQYCHJ，项目名称:termloop，代码行数:20，代码来源:audio.go

示例15: main

func main() {
	flag.Usage = func() {
		fmt.Fprint(os.Stderr, usage)
		flag.PrintDefaults()
		os.Exit(2)
	}
	flag.Parse()
	if flag.NArg() != 1 {
		flag.Usage()
	}
	p, err := drum.DecodeFile(flag.Arg(0))
	if err != nil {
		log.Fatalf("cannot decode splice file: %v", err)
	}
	if *showInfo {
		fmt.Print(p)
		return
	}
	patches, err := readPatches(p, *sampleDir)
	if err != nil {
		log.Fatalf("cannot read sample patches: %v", err)
	}
	drumMod, err := drummachine.New(p, patches)
	if err != nil {
		log.Fatalf("cannot make new drum machine: %v", err)
	}

	portaudio.Initialize()
	defer portaudio.Terminate()

	portmidi.Initialize()
	defer portmidi.Terminate()

	e := audio.NewEngine()
	e.Input("in", drumMod)
	if err := e.Start(); err != nil {
		panic(err)
	}
	select {}
}

开发者ID:billyboar，项目名称:GCSolutions，代码行数:40，代码来源:main.go

示例16: NewPort

func NewPort(sampleRate, channels int) (Output, error) {
	// todo: fix race condition
	if portInitCount == 0 {
		portaudio.Initialize()
	}
	portInitCount++

	p := port{
		ch: make(chan []float32),
	}
	var err error
	p.st, err = portaudio.OpenDefaultStream(0, channels, float64(sampleRate), 1024, p.Fetch)
	if err != nil {
		p.Dispose()
		return nil, err
	}
	if err := p.st.Start(); err != nil {
		p.Dispose()
		return nil, err
	}
	return &p, nil
}

开发者ID:rossipedia，项目名称:mog，代码行数:22，代码来源:port.go

示例17: Run

func Run(paths []string) {
	// initialize audio
	portaudio.Initialize()
	defer portaudio.Terminate()

	audio := NewAudio()
	if err := audio.Start(); err != nil {
		log.Fatalln(err)
	}
	defer audio.Stop()

	// initialize glfw
	if err := glfw.Init(); err != nil {
		log.Fatalln(err)
	}
	defer glfw.Terminate()

	// create window
	glfw.WindowHint(glfw.ContextVersionMajor, 2)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	window, err := glfw.CreateWindow(width*scale, height*scale, title, nil, nil)
	if err != nil {
		log.Fatalln(err)
	}
	window.MakeContextCurrent()

	// initialize gl
	if err := gl.Init(); err != nil {
		log.Fatalln(err)
	}
	gl.Enable(gl.TEXTURE_2D)

	// run director
	director := NewDirector(window, audio)
	director.Start(paths)
}

开发者ID:tiancode，项目名称:nes，代码行数:36，代码来源:run.go

示例18: main

func main() {
	if len(os.Args) < 2 {
		fmt.Println("missing required argument:  input file name")
		return
	}
	fmt.Println("Playing.  Press Ctrl-C to stop.")

	sig := make(chan os.Signal, 1)
	signal.Notify(sig, os.Interrupt, os.Kill)

	fileName := os.Args[1]
	f, err := os.Open(fileName)
	chk(err)
	defer f.Close()

	id, data, err := readChunk(f)
	chk(err)
	if id.String() != "FORM" {
		fmt.Println("bad file format")
		return
	}
	_, err = data.Read(id[:])
	chk(err)
	if id.String() != "AIFF" {
		fmt.Println("bad file format")
		return
	}
	var c commonChunk
	var audio io.Reader
	for {
		id, chunk, err := readChunk(data)
		if err == io.EOF {
			break
		}
		chk(err)
		switch id.String() {
		case "COMM":
			chk(binary.Read(chunk, binary.BigEndian, &c))
		case "SSND":
			chunk.Seek(8, 1) //ignore offset and block
			audio = chunk
		default:
			fmt.Printf("ignoring unknown chunk '%s'\n", id)
		}
	}

	//assume 44100 sample rate, mono, 32 bit

	portaudio.Initialize()
	defer portaudio.Terminate()
	out := make([]int32, 8192)
	stream, err := portaudio.OpenDefaultStream(0, 1, 44100, len(out), &out)
	chk(err)
	defer stream.Close()

	chk(stream.Start())
	defer stream.Stop()
	for remaining := int(c.NumSamples); remaining > 0; remaining -= len(out) {
		if len(out) > remaining {
			out = out[:remaining]
		}
		err := binary.Read(audio, binary.BigEndian, out)
		if err == io.EOF {
			break
		}
		chk(err)
		chk(stream.Write())
		select {
		case <-sig:
			return
		default:
		}
	}
}

开发者ID:krak3n，项目名称:portaudio-go，代码行数:74，代码来源:play.go

示例19: NewMachine

// NewMachine creates the Machine struct and loads it with all
// available samples and sequences. it is expected that there will both a
// 'samples' directory and a 'sequences' directory within the package
func NewMachine(sequenceDir, sampleDir string) (*Machine, error) {
	m := Machine{sequenceDir: sequenceDir, sampleDir: sampleDir}
	m.Samples = make(map[string]Sample)

	// load samples
	dirs, err := ioutil.ReadDir(m.sampleDir)
	if err != nil {
		return nil, err
	}
	for _, d := range dirs {
		if !d.IsDir() {
			continue
		}
		files, err := ioutil.ReadDir(path.Join(m.sampleDir, d.Name()))
		if err != nil {
			return nil, err
		}
		m.Samples[d.Name()] = Sample{
			Name:   d.Name(),
			sounds: make(map[soundKey]*audioData)}
		for _, f := range files {
			if strings.ToLower(path.Ext(f.Name())) != ".wav" {
				continue
			}
			ss := strings.SplitN(f.Name(), " ", 2)
			id, err := strconv.Atoi(ss[0])
			if err != nil || len(ss) < 2 {
				continue
			}
			nm := strings.SplitN(ss[1], ".", 2)
			if len(nm) < 2 {
				continue
			}
			s, err := decodeAudio(path.Join(m.sampleDir, d.Name(), f.Name()))
			if err != nil {
				return nil, err
			}
			m.Samples[d.Name()].sounds[soundKey{ID: uint16(id), Name: nm[0]}] = s
		}
	}

	// load sequences
	files, err := ioutil.ReadDir(m.sequenceDir)
	if err != nil {
		return nil, err
	}
	for _, f := range files {
		if strings.ToLower(path.Ext(f.Name())) != ".splice" {
			continue
		}
		fp := path.Join(m.sequenceDir, f.Name())
		p, err := DecodeFile(fp)
		if err != nil {
			return nil, err
		}
		nm := strings.SplitN(f.Name(), ".", 2)
		s := Sequence{Name: nm[0], Version: p.Version, Tempo: p.Tempo}

		// create sections specified by pattern
		for _, t := range p.Tracks {
			if _, ok := m.Samples[p.Version].sounds[soundKey{ID: t.ID, Name: t.Name}]; !ok {
				return nil, fmt.Errorf("failed to load sample sound: %v %v", t.ID, t.Name)
			}
			sec := Section{ID: t.ID, Name: t.Name, Beats: t.Beats, Enabled: true}
			s.Sections = append(s.Sections, &sec)
		}

		// create sections for remaining audio samples
		for sk := range m.Samples[p.Version].sounds {
			add := true
			for _, t := range p.Tracks {
				if sk.ID == t.ID && sk.Name == t.Name {
					add = false
					break
				}
			}
			if add {
				sec := Section{ID: sk.ID, Name: sk.Name}
				s.Sections = append(s.Sections, &sec)
			}
		}
		m.Sequences = append(m.Sequences, &s)
	}

	if err := portaudio.Initialize(); err != nil {
		return nil, err
	}
	stream, err := portaudio.OpenDefaultStream(0, 1, defaultSampleRate, 0, m.audioCallback)
	if err != nil {
		return nil, err
	}
	m.stream = stream
	if err := stream.Start(); err != nil {
		return nil, err
	}
	return &m, nil
}

开发者ID:billyboar，项目名称:GCSolutions，代码行数:100，代码来源:drum.go

示例20: PlayAIFF

// Play an AIFF file using PortAudio
// Base on example code from: https://code.google.com/p/portaudio-go/source/browse/portaudio/examples/play.go
func PlayAIFF(p string, sig chan int) error {

	f, err := os.Open(p)
	if err != nil {
		return err
	}
	defer f.Close()

	id, data, err := readChunk(f)
	if err != nil {
		return err
	}
	if id.String() != "FORM" {
		return ErrBadFileFormat
	}
	_, err = data.Read(id[:])
	if err != nil {
		return err
	}
	if id.String() != "AIFF" {
		return ErrBadFileFormat
	}

	var c commonChunk
	var audio io.Reader
	for {
		id, chunk, err := readChunk(data)
		if err == io.EOF {
			break
		}
		if err != nil {
			return err
		}

		switch id.String() {
		case "COMM":
			err = binary.Read(chunk, binary.BigEndian, &c)
			if err != nil {
				return err
			}
		case "SSND":
			chunk.Seek(8, 1) //ignore offset and block
			audio = chunk
		default:
			fmt.Printf("ignoring unknown chunk '%s'\n", id)
		}
	}

	//assume 44100 sample rate, mono, 32 bit

	portaudio.Initialize()
	defer portaudio.Terminate()
	out := make([]int32, 8192)
	stream, err := portaudio.OpenDefaultStream(0, 1, 44100, len(out), &out)
	if err != nil {
		return err
	}
	defer stream.Close()

	err = stream.Start()
	if err != nil {
		return err
	}

	defer stream.Stop()
	for remaining := int(c.NumSamples); remaining > 0; remaining -= len(out) {
		if len(out) > remaining {
			out = out[:remaining]
		}
		err := binary.Read(audio, binary.BigEndian, out)
		if err == io.EOF {
			break
		}
		if err != nil {
			return err
		}

		err = stream.Write()
		if err != nil {
			return err
		}

		select {
		case <-sig:
			return nil
		default:
		}
	}

	return nil
}

开发者ID:fun-alex-alex2006hw，项目名称:gopher_talkie，代码行数:93，代码来源:play.go

注：本文中的code/google/com/p/portaudio-go/portaudio.Initialize函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。