Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment

Co-authored-by: Cursor <cursoragent@cursor.com>

avatar/renderer/service.go

@@ -0,0 +1,143 @@
+package renderer
+
+import (
+	"context"
+	"fmt"
+)
+
+// Service controls Unreal Engine avatar rendering
+type Service interface {
+	StartSession(ctx context.Context, sessionID string) error
+	StopSession(ctx context.Context, sessionID string) error
+	SendAnimationParams(ctx context.Context, sessionID string, params *AnimationParams) error
+	GetVideoStream(ctx context.Context, sessionID string) (string, error) // Returns WebRTC stream URL
+}
+
+// AnimationParams contains animation parameters for the avatar
+type AnimationParams struct {
+	Visemes     []VisemeEvent
+	Expressions *ExpressionParams
+	Gestures    []GestureEvent
+	Gaze        *GazeParams
+}
+
+// VisemeEvent represents a viseme (lip shape) event
+type VisemeEvent struct {
+	Viseme    string
+	StartTime float64
+	EndTime   float64
+	Intensity float64
+}
+
+// ExpressionParams contains facial expression parameters
+type ExpressionParams struct {
+	Valence float64 // -1.0 to 1.0
+	Arousal float64 // 0.0 to 1.0
+	Emotion string  // e.g., "happy", "neutral", "concerned"
+}
+
+// GestureEvent represents a gesture event
+type GestureEvent struct {
+	Type      string  // e.g., "nod", "point", "wave"
+	StartTime float64
+	Duration  float64
+	Intensity float64
+}
+
+// GazeParams contains gaze/head tracking parameters
+type GazeParams struct {
+	TargetX float64
+	TargetY float64
+	TargetZ float64
+}
+
+// PixelStreamingService implements avatar rendering using Unreal PixelStreaming
+type PixelStreamingService struct {
+	unrealInstances map[string]*UnrealInstance
+}
+
+// UnrealInstance represents a running Unreal Engine instance
+type UnrealInstance struct {
+	SessionID   string
+	ProcessID   int
+	StreamURL   string
+	Status      string // "starting", "running", "stopping", "stopped"
+}
+
+// NewPixelStreamingService creates a new PixelStreaming service
+func NewPixelStreamingService() *PixelStreamingService {
+	return &PixelStreamingService{
+		unrealInstances: make(map[string]*UnrealInstance),
+	}
+}
+
+// StartSession starts an Unreal instance for a session
+func (s *PixelStreamingService) StartSession(ctx context.Context, sessionID string) error {
+	// TODO: Launch Unreal Engine with PixelStreaming enabled
+	// This would involve:
+	// 1. Starting Unreal Engine process with command-line args for PixelStreaming
+	// 2. Configuring the instance for the session
+	// 3. Getting the WebRTC stream URL
+	// 4. Storing instance info
+
+	instance := &UnrealInstance{
+		SessionID: sessionID,
+		Status:    "starting",
+	}
+
+	s.unrealInstances[sessionID] = instance
+
+	// Simulate instance startup
+	instance.Status = "running"
+	instance.StreamURL = fmt.Sprintf("ws://localhost:8888/stream/%s", sessionID)
+
+	return nil
+}
+
+// StopSession stops an Unreal instance
+func (s *PixelStreamingService) StopSession(ctx context.Context, sessionID string) error {
+	instance, ok := s.unrealInstances[sessionID]
+	if !ok {
+		return fmt.Errorf("instance not found for session: %s", sessionID)
+	}
+
+	instance.Status = "stopping"
+	// TODO: Terminate Unreal Engine process
+	instance.Status = "stopped"
+	delete(s.unrealInstances, sessionID)
+
+	return nil
+}
+
+// SendAnimationParams sends animation parameters to Unreal
+func (s *PixelStreamingService) SendAnimationParams(ctx context.Context, sessionID string, params *AnimationParams) error {
+	instance, ok := s.unrealInstances[sessionID]
+	if !ok {
+		return fmt.Errorf("instance not found for session: %s", sessionID)
+	}
+
+	// TODO: Send parameters via WebSocket or HTTP to Unreal PixelStreaming plugin
+	// This would involve:
+	// 1. Serializing AnimationParams to JSON
+	// 2. Sending to Unreal instance's control endpoint
+	// 3. Unreal receives and applies to avatar
+
+	_ = instance // Use instance
+
+	return nil
+}
+
+// GetVideoStream returns the WebRTC stream URL for a session
+func (s *PixelStreamingService) GetVideoStream(ctx context.Context, sessionID string) (string, error) {
+	instance, ok := s.unrealInstances[sessionID]
+	if !ok {
+		return "", fmt.Errorf("instance not found for session: %s", sessionID)
+	}
+
+	if instance.Status != "running" {
+		return "", fmt.Errorf("instance not running for session: %s", sessionID)
+	}
+
+	return instance.StreamURL, nil
+}
+