Add go-api-examples (#219)

2023-07-21 17:56:09 +08:00
parent 6125d9e063
commit e63d205b3d
28 changed files with 1624 additions and 14 deletions
--- a/go-api-examples/real-time-speech-recognition-from-microphone/main.go
+++ b/go-api-examples/real-time-speech-recognition-from-microphone/main.go
@@ -0,0 +1,110 @@
+package main
+
+import (
+	"github.com/gordonklaus/portaudio"
+	sherpa "github.com/k2-fsa/sherpa-onnx-go/sherpa_onnx"
+	flag "github.com/spf13/pflag"
+	"strings"
+
+	"fmt"
+	"log"
+)
+
+func main() {
+	err := portaudio.Initialize()
+	if err != nil {
+		log.Fatalf("Unable to initialize portaudio: %v\n", err)
+	}
+	defer portaudio.Terminate()
+
+	default_device, err := portaudio.DefaultInputDevice()
+	if err != nil {
+		log.Fatal("Failed to get default input device: %v\n", err)
+	}
+	fmt.Printf("Select default input device: %s\n", default_device.Name)
+	param := portaudio.StreamParameters{}
+	param.Input.Device = default_device
+	param.Input.Channels = 1
+	param.Input.Latency = default_device.DefaultLowInputLatency
+
+	param.SampleRate = 16000
+	param.FramesPerBuffer = 0
+	param.Flags = portaudio.ClipOff
+
+	config := sherpa.OnlineRecognizerConfig{}
+	config.FeatConfig = sherpa.FeatureConfig{SampleRate: 16000, FeatureDim: 80}
+
+	flag.StringVar(&config.ModelConfig.Encoder, "encoder", "", "Path to the encoder model")
+	flag.StringVar(&config.ModelConfig.Decoder, "decoder", "", "Path to the decoder model")
+	flag.StringVar(&config.ModelConfig.Joiner, "joiner", "", "Path to the joiner model")
+	flag.StringVar(&config.ModelConfig.Tokens, "tokens", "", "Path to the tokens file")
+	flag.IntVar(&config.ModelConfig.NumThreads, "num-threads", 1, "Number of threads for computing")
+	flag.IntVar(&config.ModelConfig.Debug, "debug", 0, "Whether to show debug message")
+	flag.StringVar(&config.ModelConfig.ModelType, "model-type", "", "Optional. Used for loading the model in a faster way")
+	flag.StringVar(&config.ModelConfig.Provider, "provider", "cpu", "Provider to use")
+	flag.StringVar(&config.DecodingMethod, "decoding-method", "greedy_search", "Decoding method. Possible values: greedy_search, modified_beam_search")
+	flag.IntVar(&config.MaxActivePaths, "max-active-paths", 4, "Used only when --decoding-method is modified_beam_search")
+	flag.IntVar(&config.EnableEndpoint, "enable-endpoint", 1, "Whether to enable endpoint")
+	flag.Float32Var(&config.Rule1MinTrailingSilence, "rule1-min-trailing-silence", 2.4, "Threshold for rule1")
+	flag.Float32Var(&config.Rule2MinTrailingSilence, "rule2-min-trailing-silence", 1.2, "Threshold for rule2")
+	flag.Float32Var(&config.Rule3MinUtteranceLength, "rule3-min-utterance-length", 20, "Threshold for rule3")
+
+	flag.Parse()
+
+	log.Println("Initializing recognizer (may take several seconds)")
+	recognizer := sherpa.NewOnlineRecognizer(&config)
+	log.Println("Recognizer created!")
+	defer sherpa.DeleteOnlineRecognizer(recognizer)
+
+	stream := sherpa.NewOnlineStream(recognizer)
+
+	// you can choose another value for 0.1 if you want
+	samplesPerCall := int32(param.SampleRate * 0.1) // 0.1 second
+
+	samples := make([]float32, samplesPerCall)
+	s, err := portaudio.OpenStream(param, samples)
+	if err != nil {
+		log.Fatalf("Failed to open the stream")
+	}
+	defer s.Close()
+	chk(s.Start())
+
+	var last_text string
+
+	segment_idx := 0
+
+	fmt.Println("Started! Please speak")
+
+	for {
+		chk(s.Read())
+		stream.AcceptWaveform(int(param.SampleRate), samples)
+
+		for recognizer.IsReady(stream) {
+			recognizer.Decode(stream)
+		}
+
+		text := recognizer.GetResult(stream).Text
+		if len(text) != 0 && last_text != text {
+			last_text = strings.ToLower(text)
+			fmt.Printf("\r%d: %s", segment_idx, last_text)
+		}
+
+		if recognizer.IsEndpoint(stream) {
+			if len(text) != 0 {
+				segment_idx++
+				fmt.Println()
+			}
+			recognizer.Reset(stream)
+		}
+	}
+
+	chk(s.Stop())
+	return
+
+}
+
+func chk(err error) {
+	if err != nil {
+		panic(err)
+	}
+}