main.go
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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)
}
}