feat: add tts with go-piper (#649)

Signed-off-by: mudler <mudler@localai.io>

pkg/tts/generate.go

@@ -0,0 +1,12 @@
+//go:build tts
+// +build tts
+
+package tts
+
+import (
+	piper "github.com/mudler/go-piper"
+)
+
+func tts(text, model, assetDir, arLib, dst string) error {
+	return piper.TextToWav(text, model, assetDir, arLib, dst)
+}

pkg/tts/generate_unsupported.go

@@ -0,0 +1,10 @@
+//go:build !tts
+// +build !tts
+
+package tts
+
+import "fmt"
+
+func tts(text, model, assetDir, arLib, dst string) error {
+	return fmt.Errorf("this version of LocalAI was built without the tts tag")
+}

pkg/tts/piper.go

@@ -0,0 +1,20 @@
+package tts
+
+import "os"
+
+type Piper struct {
+	assetDir string
+}
+
+func New(assetDir string) (*Piper, error) {
+	if _, err := os.Stat(assetDir); err != nil {
+		return nil, err
+	}
+	return &Piper{
+		assetDir: assetDir,
+	}, nil
+}
+
+func (s *Piper) TTS(text, model, dst string) error {
+	return tts(text, model, s.assetDir, "", dst)
+}