Add Go API for speech enhancement GTCRN models (#1991)

go-api-examples/speech-enhancement-gtcrn/go.mod

@@ -0,0 +1,4 @@
+module speech-enhancement-gtcrn
+
+go 1.17
+

go-api-examples/speech-enhancement-gtcrn/main.go

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+package main
+
+import (
+	sherpa "github.com/k2-fsa/sherpa-onnx-go/sherpa_onnx"
+	"log"
+)
+
+func main() {
+	log.SetFlags(log.LstdFlags | log.Lmicroseconds)
+
+	config := sherpa.OfflineSpeechDenoiserConfig{}
+
+	// Please download the models from
+	// https://github.com/k2-fsa/sherpa-onnx/releases/tag/speech-enhancement-models
+
+	config.Model.Gtcrn.Model = "./gtcrn_simple.onnx"
+	config.Model.NumThreads = 1
+	config.Model.Debug = 1
+
+	sd := sherpa.NewOfflineSpeechDenoiser(&config)
+	defer sherpa.DeleteOfflineSpeechDenoiser(sd)
+
+	wave_filename := "./inp_16k.wav"
+
+	wave := sherpa.ReadWave(wave_filename)
+	if wave == nil {
+		log.Printf("Failed to read %v\n", wave_filename)
+		return
+	}
+
+	log.Println("Started")
+	audio := sd.Run(wave.Samples, wave.SampleRate)
+	log.Println("Done!")
+
+	filename := "./enhanced-16k.wav"
+	ok := audio.Save(filename)
+	if !ok {
+		log.Fatalf("Failed to write", filename)
+	} else {
+		log.Println("Saved to ", filename)
+	}
+
+}

go-api-examples/speech-enhancement-gtcrn/run.sh

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+#!/usr/bin/env bash
+set -ex
+
+if [ ! -f ./gtcrn_simple.onnx ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/gtcrn_simple.onnx
+fi
+
+if [ ! -f ./inp_16k.wav ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/inp_16k.wav
+fi
+
+go mod tidy
+go build
+
+./speech-enhancement-gtcrn