gRPC client stubs

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

backend/backend.proto

@@ -159,7 +159,7 @@ message Reply {
   bytes message = 1;
   int32 tokens = 2;
   int32 prompt_tokens = 3;
-  string audio_output = 4;
+  bytes audio = 5;
 }
 
 message ModelOptions {

core/http/endpoints/openai/realtime.go

@@ -120,6 +120,8 @@ var sessionLock sync.Mutex
 // TODO: implement interface as we start to define usages
 type Model interface {
 	VAD(ctx context.Context, in *proto.VADRequest, opts ...grpc.CallOption) (*proto.VADResponse, error)
+	Predict(ctx context.Context, in *proto.PredictOptions, opts ...grpc.CallOption) (*proto.Reply, error)
+	PredictStream(ctx context.Context, in *proto.PredictOptions, f func(s []byte), opts ...grpc.CallOption) error
 }
 
 func RegisterRealtime(cl *config.BackendConfigLoader, ml *model.ModelLoader, appConfig *config.ApplicationConfig) func(c *websocket.Conn) {
@@ -800,7 +802,17 @@ func processAudioResponse(session *Session, audioData []byte) (string, []byte, *
 	// 4. Convert the response text to speech (audio)
 	//
 	// Placeholder implementation:
-	// TODO: use session.ModelInterface...
+
+	// TODO: template eventual messages, like chat.go
+	reply, err := session.ModelInterface.Predict(context.Background(), &proto.PredictOptions{
+		Prompt: "What's the weather in New York?",
+	})
+
+	if err != nil {
+		return "", nil, nil, err
+	}
+
+	generatedAudio := reply.Audio
 
 	transcribedText := "What's the weather in New York?"
 	var functionCall *FunctionCall
@@ -819,9 +831,6 @@ func processAudioResponse(session *Session, audioData []byte) (string, []byte, *
 
 	// Generate a response
 	generatedText := "This is a response to your speech input."
-	generatedAudio := []byte{} // Generate audio bytes from the generatedText
-
-	// TODO: Implement actual transcription and TTS
 
 	return generatedText, generatedAudio, nil, nil
 }

core/http/endpoints/openai/realtime_model.go

@@ -13,6 +13,11 @@ import (
 	"google.golang.org/grpc"
 )
 
+var (
+	_ Model = new(wrappedModel)
+	_ Model = new(anyToAnyModel)
+)
+
 // wrappedModel represent a model which does not support Any-to-Any operations
 // This means that we will fake an Any-to-Any model by overriding some of the gRPC client methods
 // which are for Any-To-Any models, but instead we will call a pipeline (for e.g STT->LLM->TTS)
@@ -47,6 +52,27 @@ func (m *anyToAnyModel) VAD(ctx context.Context, in *proto.VADRequest, opts ...g
 	return m.VADClient.VAD(ctx, in)
 }
 
+func (m *wrappedModel) Predict(ctx context.Context, in *proto.PredictOptions, opts ...grpc.CallOption) (*proto.Reply, error) {
+	// TODO: Convert with pipeline (audio to text, text to llm, result to tts, and return it)
+	// sound.BufferAsWAV(audioData, "audio.wav")
+
+	return m.LLMClient.Predict(ctx, in)
+}
+
+func (m *wrappedModel) PredictStream(ctx context.Context, in *proto.PredictOptions, f func(s []byte), opts ...grpc.CallOption) error {
+	// TODO: Convert with pipeline (audio to text, text to llm, result to tts, and return it)
+
+	return m.LLMClient.PredictStream(ctx, in, f)
+}
+
+func (m *anyToAnyModel) Predict(ctx context.Context, in *proto.PredictOptions, opts ...grpc.CallOption) (*proto.Reply, error) {
+	return m.LLMClient.Predict(ctx, in)
+}
+
+func (m *anyToAnyModel) PredictStream(ctx context.Context, in *proto.PredictOptions, f func(s []byte), opts ...grpc.CallOption) error {
+	return m.LLMClient.PredictStream(ctx, in, f)
+}
+
 // returns and loads either a wrapped model or a model that support audio-to-audio
 func newModel(cl *config.BackendConfigLoader, ml *model.ModelLoader, appConfig *config.ApplicationConfig, modelName string) (Model, error) {
 

pkg/grpc/backend.go

@@ -35,9 +35,9 @@ type Backend interface {
 	IsBusy() bool
 	HealthCheck(ctx context.Context) (bool, error)
 	Embeddings(ctx context.Context, in *pb.PredictOptions, opts ...grpc.CallOption) (*pb.EmbeddingResult, error)
-	Predict(ctx context.Context, in *pb.PredictOptions, opts ...grpc.CallOption) (*pb.Reply, error)
 	LoadModel(ctx context.Context, in *pb.ModelOptions, opts ...grpc.CallOption) (*pb.Result, error)
 	PredictStream(ctx context.Context, in *pb.PredictOptions, f func(reply *pb.Reply), opts ...grpc.CallOption) error
+	Predict(ctx context.Context, in *pb.PredictOptions, opts ...grpc.CallOption) (*pb.Reply, error)
 	GenerateImage(ctx context.Context, in *pb.GenerateImageRequest, opts ...grpc.CallOption) (*pb.Result, error)
 	TTS(ctx context.Context, in *pb.TTSRequest, opts ...grpc.CallOption) (*pb.Result, error)
 	SoundGeneration(ctx context.Context, in *pb.SoundGenerationRequest, opts ...grpc.CallOption) (*pb.Result, error)