fix api

vr180_streaming/sam2_streaming.py

@@ -129,9 +129,45 @@ class SAM2StreamingProcessor:
         # Create a streaming-compatible inference state
         # This mirrors SAM2's internal state structure but without video frames
         
+        # Use SAM2's init_state but with a dummy 1-frame video to avoid loading
+        # We'll override the frame access later
+        try:
+            # Create a minimal dummy video file temporarily
+            import tempfile
+            import cv2
+            
+            # Create 1-frame dummy video
+            with tempfile.NamedTemporaryFile(suffix='.mp4', delete=False) as tmp_file:
+                dummy_path = tmp_file.name
+                
+            # Write a single frame video
+            fourcc = cv2.VideoWriter_fourcc(*'mp4v')
+            out = cv2.VideoWriter(dummy_path, fourcc, 1.0, (video_info['width'], video_info['height']))
+            dummy_frame = np.zeros((video_info['height'], video_info['width'], 3), dtype=np.uint8)
+            out.write(dummy_frame)
+            out.release()
+            
+            # Initialize with dummy video (SAM2 will load metadata only from 1 frame)
             with torch.inference_mode():
-            # Initialize empty inference state using SAM2's predictor
+                inference_state = self.predictor.init_state(
-            # We'll manually provide frames via propagate calls
+                    video_path=dummy_path,
+                    offload_video_to_cpu=self.memory_offload,
+                    offload_state_to_cpu=self.memory_offload,
+                    async_loading_frames=True
+                )
+                
+            # Clean up dummy file
+            import os
+            os.unlink(dummy_path)
+            
+            # Update state with actual video info
+            inference_state['num_frames'] = video_info.get('total_frames', video_info.get('frame_count', 0))
+            inference_state['video_height'] = video_info['height']
+            inference_state['video_width'] = video_info['width']
+            
+        except Exception as e:
+            print(f"   Warning: Failed to create proper SAM2 state ({e}), using minimal state")
+            # Fallback to minimal state
             inference_state = {
                 'point_inputs_per_obj': {},
                 'mask_inputs_per_obj': {},
@@ -151,13 +187,8 @@ class SAM2StreamingProcessor:
                 'storage_device': torch.device('cpu') if self.memory_offload else self.device,
                 'offload_video_to_cpu': self.memory_offload,
                 'offload_state_to_cpu': self.memory_offload,
-                'inference_state': {},
             }
             
-            # Initialize SAM2 constants that don't depend on video frames
-            self.predictor._get_image_feature_cache = {}
-            self.predictor._feature_bank = {}
-            
         return inference_state
         
     def add_detections(self, 
@@ -198,16 +229,16 @@ class SAM2StreamingProcessor:
         # Manually process frame and add prompts (streaming approach)
         with torch.inference_mode():
             # Process frame through SAM2's image encoder
-            features = self.predictor._get_image_features(frame_tensor)
+            backbone_out = self.predictor.forward_image(frame_tensor)
             
             # Store features in state for this frame
-            state['cached_features'][frame_idx] = features
+            state['cached_features'][frame_idx] = backbone_out
             
             # Add boxes as prompts for this specific frame
             _, object_ids, masks = self.predictor.add_new_points_or_box(
                 inference_state=state,
                 frame_idx=frame_idx,
-                obj_id=0,  # SAM2 will auto-increment
+                obj_id=None,  # Let SAM2 auto-assign
                 box=boxes_tensor
             )
             
@@ -239,34 +270,42 @@ class SAM2StreamingProcessor:
         
         with torch.inference_mode():
             # Process frame through SAM2's image encoder
-            features = self.predictor._get_image_features(frame_tensor)
+            backbone_out = self.predictor.forward_image(frame_tensor)
             
             # Store features in state for this frame
-            state['cached_features'][frame_idx] = features
+            state['cached_features'][frame_idx] = backbone_out
             
-            # Get masks for current frame by propagating from previous frames
+            # Use SAM2's single frame inference for propagation
-            masks = []
-            for obj_id in state.get('obj_ids', []):
-                # Use SAM2's mask propagation for this object
             try:
-                    obj_mask = self.predictor._propagate_single_object(
+                # Run single frame inference for all tracked objects
-                        state, obj_id, frame_idx, features
+                output_dict = {}
+                self.predictor._run_single_frame_inference(
+                    inference_state=state,
+                    output_dict=output_dict,
+                    frame_idx=frame_idx,
+                    batch_size=1,
+                    is_init_cond_frame=False,  # Not initialization frame
+                    point_inputs=None,
+                    mask_inputs=None,
+                    reverse=False,
+                    run_mem_encoder=True
                 )
-                    if obj_mask is not None:
-                        masks.append(obj_mask)
-                except Exception as e:
-                    # If propagation fails, use empty mask
-                    print(f"   Warning: Propagation failed for object {obj_id}: {e}")
-                    empty_mask = torch.zeros((frame.shape[0], frame.shape[1]), device=self.device)
-                    masks.append(empty_mask)
                 
+                # Extract masks from output
+                if output_dict and 'pred_masks' in output_dict:
+                    pred_masks = output_dict['pred_masks']
                     # Combine all object masks
-            if masks:
+                    if pred_masks.shape[0] > 0:
-                combined_mask = torch.stack(masks).max(dim=0)[0]
+                        combined_mask = pred_masks.max(dim=0)[0]
-                # Convert to numpy
+                        combined_mask_np = (combined_mask > 0.0).cpu().numpy().astype(np.uint8) * 255
-                combined_mask_np = combined_mask.cpu().numpy().astype(np.uint8)
                     else:
                         combined_mask_np = np.zeros((frame.shape[0], frame.shape[1]), dtype=np.uint8)
+                else:
+                    combined_mask_np = np.zeros((frame.shape[0], frame.shape[1]), dtype=np.uint8)
+                    
+            except Exception as e:
+                print(f"   Warning: Single frame inference failed: {e}")
+                combined_mask_np = np.zeros((frame.shape[0], frame.shape[1]), dtype=np.uint8)
             
             # Cleanup old features to prevent memory accumulation
             self._cleanup_old_features(state, frame_idx, keep_frames=10)