接入 Studio 多点标定的会话置零与状态记录

支持显式无载荷置零、处理线程内切换模型及完整标定包快照。shared、界面检查与兼容测试通过；Studio 全量仍有一项回放停止时序测试失败。

apps/studio/config/locales/en_US.json

@@ -1,4 +1,18 @@
 {
+  "multical": {
+    "video_zero": "I confirm 30 frames from the reference frame are unloaded",
+    "video_zero_tip": "For models requiring a session zero. Measure it from this interval; tracker reference alone does not imply zero load.",
+    "zero": "Unloaded zero",
+    "zero_confirm": "Remove all load and keep the sensor unloaded for the next 30 processed frames. For video, pause at a known unloaded interval first. Measure a new session zero now?",
+    "zero_pending": "Measuring unloaded zero from 30 frames. Keep all load removed.",
+    "ok": "Ready",
+    "zero_unavailable": "Unloaded zero required",
+    "no_contact": "No contact",
+    "outside_coverage": "Outside calibration coverage",
+    "coordinate_unmapped": "Contact position unavailable",
+    "out_of_range": "Outside calibrated force range",
+    "invalid_input": "Invalid measurement"
+  },
   "app": {
     "title": "Orisys Studio",
     "about_title": "About",

apps/studio/config/locales/zh_CN.json

@@ -1,4 +1,18 @@
 {
+  "multical": {
+    "video_zero": "我确认从参考帧开始的 30 帧均无载荷",
+    "video_zero_tip": "适用于需要单独测量零点的模型。用此片段测量会话零点；选择跟踪参考帧本身不代表零载荷。",
+    "zero": "无载荷置零",
+    "zero_confirm": "请移除全部载荷，并在接下来 30 个处理帧内保持无载荷。使用录像时，请先暂停在已确认的无载荷片段。现在测量本次会话零点吗？",
+    "zero_pending": "正在用 30 帧测量零点，请保持无载荷。",
+    "ok": "有效",
+    "zero_unavailable": "需要无载荷置零",
+    "no_contact": "未检测到接触",
+    "outside_coverage": "超出标定覆盖区域",
+    "coordinate_unmapped": "接触位置无法映射",
+    "out_of_range": "超出标定力值范围",
+    "invalid_input": "测量无效"
+  },
   "app": {
     "title": "Orisys Studio",
     "about_title": "关于",

apps/studio/docs/sensor-bundles.md

@@ -64,6 +64,32 @@ Dropping a key means migrating those readers first, not tidying up the JSON.
 
 ## Verification
 
+### Multi-point force calibration
+
+Finger sessions accept SDK schema 3 files through the existing calibration-file picker and
+operator-confirmed SN. The SDK checks processing settings, geometry and coordinate-map identity;
+a mismatch blocks loading rather than falling back to raw values. Keep the JSON and its declared
+NPZ artifacts together. The file format and supported models are defined in the
+[SDK calibration contract](../../../../orisys-sdk/docs/calibration-model-contract.zh.md).
+
+After starting, remove all load and select **Unloaded zero**. Confirm that the next 30 processed
+frames are unloaded. Contact, invalid readings or tracker reset cancel an unfinished measurement.
+Zero values belong to this session; tracker reset and model replacement require a new zero.
+Model replacement is applied between frames on the SDK HHD thread. The rail reports per-axis
+zero, contact, coverage and range states; an unavailable newton value stays unavailable while raw
+measurements remain accessible. Selecting a tracker reference alone never implies zero load.
+
+For bare-video recomputation, explicitly confirm the unloaded 30-frame interval starting at the
+selected reference frame. This choice changes the analysis cache identity; a short or invalid
+interval fails the pass. Leave the option unchecked for legacy calibration or when no unloaded
+interval has been verified.
+
+Recording format 1.5 appends `calibration_status` and `calibration_reference` JSON columns to
+`forces.csv`; existing columns keep their positions. Raw validity and per-axis model validity
+are distinct. Recordings store each schema 3 JSON with its artifacts in a directory identified by
+the SDK model fingerprint, so recorded calibration remains loadable without the original folder.
+Older recordings remain readable and carry no invented zero or model-state information.
+
 `apps/studio/tests/test_sensor_catalog_root.py` asserts the descriptor's fields, that every
 declared path is relative and present, that the declared map is the one the running chain derives
 for itself (the SDK's `scaled_map_cache_path`, so `_s0.42.npz` and never a neighbouring

apps/studio/src/orisys_studio/acquire_presenter.py

@@ -132,6 +132,9 @@ class AcquirePresenter(QObject):
         self._host.refresh_record_state()
 
     def _push_forces(self, packet: Any):
+        show_model = getattr(self._host.toolbar, "set_model_calibration_status", None)
+        if callable(show_model):
+            show_model(dict(getattr(packet, "calibration_status", {}) or {}))
         record = to_record_sample(packet)
         if not record.valid:
             self._host.session.last_sample_valid = False

apps/studio/src/orisys_studio/app_window.py

@@ -911,6 +911,7 @@ class StudioMainWindow(QMainWindow):
         self.toolbar.stop_clicked.connect(self._on_stop_clicked)
         self.toolbar.record_toggled.connect(self._on_record_toggled)
         self.toolbar.reset_clicked.connect(self._on_reset)
+        self.toolbar.calibration_zero_clicked.connect(self._on_calibration_zero)
         self.toolbar.units_changed.connect(self.display_ctl.on_units_changed)
         self.toolbar.settings_toggled.connect(self.layout_ctl.on_settings_toggled)
 
@@ -1846,7 +1847,7 @@ class StudioMainWindow(QMainWindow):
                     t("sensor.live_calibration_invalid", reason=problem)
                 )
                 return
-        cal_path, _device_id, problem = self._resolved_live_calibration()
+        cal_path, device_id, problem = self._resolved_live_calibration()
         if problem:
             self.statusBar().showMessage(
                 t("sensor.live_calibration_invalid", reason=problem)
@@ -1859,7 +1860,10 @@ class StudioMainWindow(QMainWindow):
         if worker is None or not hasattr(worker, "set_pending_calibration"):
             self.statusBar().showMessage(t("cal.apply_no_target"))
             return
-        worker.set_pending_calibration(cal_path)
+        if device_id and hasattr(worker, "request_calibration_zero"):
+            worker.set_pending_calibration(cal_path, device_id=device_id)
+        else:
+            worker.set_pending_calibration(cal_path)
         self.statusBar().showMessage(
             t("sensor.live_calibration_applied", name=cal_path.name)
         )
@@ -2319,6 +2323,7 @@ class StudioMainWindow(QMainWindow):
             self._stop_preview(announce=False)
 
         self.force_plots.reset()
+        self.toolbar.set_model_calibration_status({})
         units = "N" if self.toolbar.units() == "newton" else "raw"
         self.force_plots.configure_presentation(
             sensor_type=sensor_type,
@@ -2482,6 +2487,19 @@ class StudioMainWindow(QMainWindow):
         except Exception as exc:
             self.statusBar().showMessage(t("status.run_failed", error=str(exc)))
 
+    def _on_calibration_zero(self) -> None:
+        """A separate explicit unloaded operation; tracker reset never assumes no load."""
+        worker = self._active_worker
+        if self._session_phase != "running" or not hasattr(worker, "request_calibration_zero"):
+            return
+        answer = QMessageBox.question(
+            self, t("multical.zero"), t("multical.zero_confirm"),
+            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
+            QMessageBox.StandardButton.No)
+        if answer == QMessageBox.StandardButton.Yes:
+            worker.request_calibration_zero()
+            self.statusBar().showMessage(t("multical.zero_pending"))
+
     def _reset_display(self) -> None:
         """The rail's reset in the replay view: clear the display and start the replay over.
 

apps/studio/src/orisys_studio/ui/toolbar.py

@@ -97,6 +97,7 @@ class ToolbarWidget(QWidget):
     #: Stop: end the live session (releasing the device), or leave the replay.
     stop_clicked = Signal()
     reset_clicked = Signal()
+    calibration_zero_clicked = Signal()
     units_changed = Signal(str)
     record_toggled = Signal(bool)
     #: The settings area was expanded or collapsed by the user.
@@ -282,6 +283,12 @@ class ToolbarWidget(QWidget):
         self.btn_reset.setMinimumHeight(BUTTON_HEIGHT)
         self.btn_reset.setEnabled(False)
         self.btn_reset.clicked.connect(self.reset_clicked.emit)
+        self.btn_calibration_zero = QPushButton()
+        self.btn_calibration_zero.setMinimumHeight(BUTTON_HEIGHT)
+        self.btn_calibration_zero.clicked.connect(self.calibration_zero_clicked.emit)
+        self.btn_calibration_zero.setVisible(False)
+        self.model_state = ShrinkableLabel()
+        self.model_state.setVisible(False)
 
         self.btn_settings = QPushButton()
         self.btn_settings.setObjectName("ghostButton")
@@ -297,6 +304,7 @@ class ToolbarWidget(QWidget):
         rail.addWidget(self.source_slot)
         rail.addWidget(self.source_summary)
         rail.addWidget(self.calibration_label)
+        rail.addWidget(self.model_state)
         rail.addWidget(self.data_state)
         # Shown, the hint takes the spare width (stretch 1); hidden, the spacer does.
         rail.addWidget(self.run_hint, 1)
@@ -306,6 +314,7 @@ class ToolbarWidget(QWidget):
         rail.addWidget(_rail(self.btn_run))
         rail.addWidget(_rail(self.btn_stop))
         rail.addWidget(_rail(self.btn_reset))
+        rail.addWidget(self.btn_calibration_zero)
         rail.addWidget(_rail(self.btn_settings))
         return rail
 
@@ -393,6 +402,17 @@ class ToolbarWidget(QWidget):
         self.calibration_label.setToolTip(self.calibration_label.text())
         self.calibration_label.setVisible(bool(text))
 
+    def set_model_calibration_status(self, statuses: dict[str, str]) -> None:
+        """Model validity is separate from whether a calibration file is loaded."""
+        text = ", ".join(f"{axis.upper()}: {t(f'multical.{value}')}" for axis, value in statuses.items())
+        self.model_state.setText(text)
+        self.model_state.setToolTip(text)
+        self.model_state.setVisible(bool(statuses))
+        self.btn_calibration_zero.setText(t("multical.zero"))
+        self.btn_calibration_zero.setToolTip(t("multical.zero_confirm"))
+        self.btn_calibration_zero.setVisible(bool(statuses) and self._run_role == "acquire")
+        self.btn_calibration_zero.setEnabled(self._reset_available)
+
     def set_data_state(self, text: str, token: str = "text_secondary") -> None:
         """Show/clear the validity readout, coloured by a theme token."""
         text = str(text or "")
@@ -435,6 +455,7 @@ class ToolbarWidget(QWidget):
         if wanted == self._run_role:
             return
         self._run_role = wanted
+        self.set_model_calibration_status({})
         # A view switch never carries the other view's running state across.
         if self.btn_run.isChecked():
             self.btn_run.blockSignals(True)
@@ -524,6 +545,7 @@ class ToolbarWidget(QWidget):
         """
         self._reset_available = bool(enabled)
         self.btn_reset.setEnabled(self._reset_available)
+        self.btn_calibration_zero.setEnabled(self._reset_available)
         self._refresh_reset_label()
 
     def reset_target(self) -> str:

apps/studio/src/orisys_studio/ui/video_analysis_dialog.py

@@ -35,6 +35,7 @@ from orisys_app_shared.i18n import t
 from orisys_app_shared.sensors import CatalogEntry, SensorCatalog
 from PySide6.QtCore import Qt
 from PySide6.QtWidgets import (
+    QCheckBox,
     QComboBox,
     QDialog,
     QDialogButtonBox,
@@ -200,6 +201,9 @@ class VideoAnalysisDialog(QDialog):
         self.reference_time_label.setObjectName("panelMeta")
         reference_row.addWidget(self.reference_time_label)
         calibration_form.addRow(self.reference_label, reference_row)
+        self.unloaded_reference = QCheckBox(t("multical.video_zero"))
+        self.unloaded_reference.setToolTip(t("multical.video_zero_tip"))
+        calibration_form.addRow(self.unloaded_reference)
         root.addLayout(calibration_form)
 
         self.note_label = ShrinkableLabel()
@@ -287,6 +291,7 @@ class VideoAnalysisDialog(QDialog):
             # as one that happened.
             reference_frame=None if reference == 1 else reference,
             device_id=self._confirmed_device_id(),
+            unloaded_reference_frames=30 if self.unloaded_reference.isChecked() else 0,
         )
 
     # ------------------------------------------------------------------ content

apps/studio/tests/test_model_calibration_ui.py

@@ -0,0 +1,36 @@
+"""Unloaded confirmation is separate from reset and model failures stay visible."""
+
+from types import SimpleNamespace
+
+import pytest
+from PySide6.QtWidgets import QMessageBox
+
+from orisys_studio.app_window import StudioMainWindow
+from orisys_studio.ui.toolbar import ToolbarWidget
+
+
+@pytest.mark.parametrize("confirmed", [False, True])
+def test_unloaded_zero_requires_operator_confirmation(monkeypatch, confirmed):
+    requested = []
+    messages = []
+    host = SimpleNamespace(
+        _session_phase="running",
+        _active_worker=SimpleNamespace(request_calibration_zero=lambda: requested.append(True)),
+        statusBar=lambda: SimpleNamespace(showMessage=messages.append))
+    monkeypatch.setattr(QMessageBox, "question", lambda *args: QMessageBox.StandardButton.Yes
+                        if confirmed else QMessageBox.StandardButton.No)
+    StudioMainWindow._on_calibration_zero(host)
+    assert bool(requested) == confirmed
+
+
+def test_model_status_and_zero_control_are_cleared_on_playback(qt_app):
+    toolbar = ToolbarWidget()
+    toolbar.set_reset_enabled(True)
+    toolbar.set_model_calibration_status({"fn": "zero_unavailable"})
+    assert not toolbar.btn_calibration_zero.isHidden()
+    assert "FN" in toolbar.model_state.text()
+    assert toolbar.btn_calibration_zero.isEnabled()
+    toolbar.set_run_role("playback")
+    assert toolbar.btn_calibration_zero.isHidden()
+    assert toolbar.model_state.isHidden()
+    toolbar.close()

shared/src/orisys_app_shared/acquisition/finger_worker.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import logging
+import statistics
 import threading
 import time
 from collections import deque
@@ -323,6 +324,12 @@ class FingerAcquisitionWorker(RecordSinkMixin):
         self._end_reason: str | None = None
         self._phase: str = "idle"
         self._pending_calibration: str | None = None
+        self._pending_device_id: str | None = None
+        self._pending_zero = False
+        self._cancel_zero = False
+        self._zero_samples: list[tuple[float, float, float]] | None = None
+        self._zero_model = None
+        self._zero_reference: dict = {}
         #: Path and device serial for the **next** ``start()`` (live open kwargs).
         self._session_cal_path: str | None = None
         self._session_device_id: str | None = None
@@ -425,6 +432,11 @@ class FingerAcquisitionWorker(RecordSinkMixin):
             # zeroing request must not fire into the new session's frames.
             self._calibration_version = ""
             self._pending_reset = False
+            self._pending_zero = False
+            self._cancel_zero = False
+            self._zero_samples = None
+            self._zero_reference = {}
+            self._pending_calibration = None
             # Nor any filter state: until this session's sensor has been
             # configured and asked, there is nothing to report about it.
             self._filter_state = {}
@@ -499,6 +511,9 @@ class FingerAcquisitionWorker(RecordSinkMixin):
         never computed: keeping the pre-pause reference frame would report the hold
         itself as a large deformation.
         """
+        with self._lock:
+            if self._zero_samples is not None:
+                self._cancel_zero = True
         pipe = self._pipe
         if pipe is None and self._pause.is_set():
             with self._lock:
@@ -531,6 +546,7 @@ class FingerAcquisitionWorker(RecordSinkMixin):
             if self._session_id <= 0:
                 raise RuntimeError("Finger runtime is not running")
             self._pending_reset = True
+            self._cancel_zero = True
 
     def _consume_pending_reset(
         self, runtime, frame_id: int, mono_t: float, *, pipeline=None
@@ -563,10 +579,53 @@ class FingerAcquisitionWorker(RecordSinkMixin):
         if self._on_reset_applied is not None:
             self._on_reset_applied(int(frame_id), float(mono_t), int(session))
 
-    def set_pending_calibration(self, path: str | Path | None) -> None:
+    def set_pending_calibration(self, path: str | Path | None, *, device_id=None) -> None:
         """Queue a force_calibration.json path for the acquisition thread."""
         with self._lock:
             self._pending_calibration = str(path) if path is not None else None
+            self._pending_device_id = device_id
+
+    def request_calibration_zero(self) -> None:
+        """Operator-confirmed unloaded interval; collect 30 frames on the HHD owner thread."""
+        with self._lock:
+            self._pending_zero = True
+
+    def _collect_zero(self, runtime, values, frame_id):
+        sensor = getattr(runtime.tactile, "raw_sensor", runtime.tactile)
+        model = getattr(sensor, "calibration", None)
+        contact_found = bool(getattr(sensor, "centroid_found", False))
+        with self._lock:
+            requested = self._pending_zero
+            self._pending_zero = False
+            resetting = self._pending_reset or self._cancel_zero
+            self._cancel_zero = False
+        if resetting or model is not self._zero_model:
+            self._zero_samples = None
+        if resetting:
+            self._zero_reference = {}
+            return
+        if requested:
+            if getattr(model, "schema_version", None) != 3:
+                raise ValueError("unloaded zero requires a schema 3 model")
+            sensor.set_calibration_reference({}, reference_id="zero-measurement-pending")
+            self._zero_samples = []
+            self._zero_model = model
+            self._zero_reference = {}
+        if self._zero_samples is None:
+            return
+        if contact_found or not np.all(np.isfinite(values)):
+            self._zero_samples = None
+            raise ValueError("unloaded zero cancelled: reset, contact or invalid force; remove load and retry")
+        self._zero_samples.append(tuple(values))
+        if len(self._zero_samples) == 30:
+            raw = {axis: statistics.median(row[index] for row in self._zero_samples)
+                   for index, axis in enumerate(("fn", "fx", "fy")) if axis in model.channels}
+            reference_id = f"studio-unloaded-{self._session_id}-{frame_id}"
+            runtime.set_calibration_reference(raw, reference_id=reference_id)
+            self._zero_reference = {"reference_id": reference_id, "raw": raw, "samples": 30,
+                                    "applied_after_frame": frame_id}
+            self._zero_samples = None
+            self._status("Unloaded session zero measured; calibration is ready for contact.")
 
     def _consume_pending_calibration(
         self, sensor, frame_id: int = 0, mono_t: float = 0.0
@@ -579,13 +638,19 @@ class FingerAcquisitionWorker(RecordSinkMixin):
         """
         with self._lock:
             path = self._pending_calibration
+            device_id = self._pending_device_id
             self._pending_calibration = None
             session = self._session_id
         if path is None or sensor is None:
             return
         if not hasattr(sensor, "set_calibration"):
             raise RuntimeError("sensor does not support set_calibration")
-        sensor.set_calibration(path)
+        if device_id:
+            sensor.set_calibration(path, device_id=device_id)
+        else:
+            sensor.set_calibration(path)
+        self._zero_samples = None
+        self._zero_reference = {}
         version = calibration_digest(path)
         self._calibration_version = version
         if self._on_calibration_applied is not None:
@@ -762,6 +827,21 @@ class FingerAcquisitionWorker(RecordSinkMixin):
         with self._lock:
             self._phase = "running"
 
+        def on_frame(snap):
+            # SDK calls this on its HHD thread, after copying this frame's outputs.
+            if any(value == "zero_unavailable" for value in (getattr(snap, "calibration_status", None) or {}).values()):
+                self._zero_reference = {}
+            snapshots.put((snap, self._calibration_version, dict(self._zero_reference)))
+            try:
+                mono_ns = getattr(snap.source_metadata, "mono_ns", None)
+                mono = max(0.0, mono_ns / 1e9 - mono_t0) if mono_ns is not None else max(0.0, time.perf_counter() - mono_t0)
+                self._consume_pending_calibration(runtime, snap.seq + 1, mono)
+                self._collect_zero(runtime, (snap.normal_force_raw, snap.shear_x_raw, snap.shear_y_raw), snap.seq)
+            except Exception as exc:  # noqa: BLE001 - reject the request, keep the existing model
+                logger.warning("Calibration request rejected: %s", exc)
+                if self._on_error is not None:
+                    self._on_error(str(exc))
+
         try:
             pipe = StreamPipeline(
                 raw_sensor,
@@ -770,7 +850,7 @@ class FingerAcquisitionWorker(RecordSinkMixin):
                 # the pane's contact overlay and the 2D arrow both read it.
                 contact=True,
                 include=self._stream_include(),
-                on_frame=snapshots.put,
+                on_frame=on_frame,
             )
         except Exception as exc:  # noqa: BLE001 - reported, not swallowed
             self._set_end_reason("error")
@@ -808,7 +888,7 @@ class FingerAcquisitionWorker(RecordSinkMixin):
                 snap = None
                 if expect > 0:
                     try:
-                        snap = snapshots.get(timeout=0.05)
+                        snap, version, reference = snapshots.get(timeout=0.05)
                     except queue_module.Empty:
                         snap = None
                     except Exception as exc:  # noqa: BLE001 - a stage failure ends the session
@@ -844,6 +924,8 @@ class FingerAcquisitionWorker(RecordSinkMixin):
                         break
                     capture_fps = packet.capture_fps
                     capture_dropped = packet.capture_dropped
+                    packet.calibration_version = version
+                    packet.calibration_reference = reference
                     if self._pause.is_set():
                         # The hold arrived after this frame was published but before
                         # it was built: see the box worker. A paused worker publishes
@@ -853,18 +935,6 @@ class FingerAcquisitionWorker(RecordSinkMixin):
                     # A zeroing is queued onto the pipeline's flow thread, which
                     # owns the tracker, and reported with the frame and time it
                     # takes effect — the same confirmation rule as the serial loop.
-                    try:
-                        self._consume_pending_calibration(
-                            tactile, frame_id + 1, float(packet.mono_t or 0.0)
-                        )
-                    except Exception as exc:  # noqa: BLE001
-                        errors.append(f"calibration rejected: {type(exc).__name__}: {exc}")
-                        packet.valid = False
-                        packet.stale_forces = True
-                        packet.forces_valid = False
-                        packet.invalid_reason = packet.invalid_reason or errors[-1]
-                        if self._on_error is not None and session == self._session_id:
-                            self._on_error(errors[-1])
                     try:
                         self._consume_pending_reset(
                             runtime,
@@ -1121,7 +1191,7 @@ class FingerAcquisitionWorker(RecordSinkMixin):
                 # frame is dated when it happened rather than when it was queued.
                 frame_mono = max(0.0, mono_ns / 1e9 - self._mono_t0)
                 try:
-                    self._consume_pending_calibration(tactile, frame_id, frame_mono)
+                    self._consume_pending_calibration(runtime, frame_id, frame_mono)
                 except Exception as exc:  # noqa: BLE001
                     message = f"calibration rejected: {type(exc).__name__}: {exc}"
                     if self._on_error is not None and session == self._session_id:
@@ -1168,6 +1238,14 @@ class FingerAcquisitionWorker(RecordSinkMixin):
                     sensor,
                     config_ref=mode.config_ref,
                 )
+                if any(value == "zero_unavailable" for value in forces.get("calibration_status", {}).values()):
+                    self._zero_reference = {}
+                reference = dict(self._zero_reference)
+                try:
+                    self._collect_zero(runtime, (forces["normal_force_raw"], forces["shear_x_raw"], forces["shear_y_raw"]), frame_id)
+                except ValueError as exc:
+                    if self._on_error is not None:
+                        self._on_error(str(exc))
                 invalid_reason = forces.get("invalid_reason") or compute_error
                 raw_frame = _ensure_bgr(source_frame).copy()
                 # The frame the tactile chain consumed, kept for depth replay.
@@ -1219,6 +1297,8 @@ class FingerAcquisitionWorker(RecordSinkMixin):
                     force_unit=forces["force_unit"],
                     force_calibrated=forces["force_calibrated"],
                     calibrated_axes=tuple(forces.get("calibrated_axes", ())),
+                    calibration_status=forces.get("calibration_status", {}),
+                    calibration_reference=reference,
                     calibration_version=self._calibration_version,
                     session_id=session,
                     frame_id=frame_id,
@@ -1238,7 +1318,8 @@ class FingerAcquisitionWorker(RecordSinkMixin):
                     flow_frame_id=frame_id if flow_valid else last_flow_frame_id,
                     depth_valid=depth_valid,
                     depth_frame_id=frame_id if depth_valid else last_depth_frame_id,
-                    forces_valid=bool(forces.get("valid", True)) and not compute_error,
+                    forces_valid=bool(forces.get("valid", True)) and not compute_error
+                    and all(value == "ok" for value in forces.get("calibration_status", {}).values()),
                     contact=contact,
                 )
                 with self._lock:

shared/src/orisys_app_shared/acquisition/models.py

@@ -9,7 +9,7 @@ from __future__ import annotations
 
 import json
 import logging
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from pathlib import Path
 
 import cv2
@@ -128,6 +128,8 @@ class SdkPacket:
     forces_valid: bool | None = None
     #: Contact centre from ``compute_contact``; optional so old call sites stay valid.
     contact: ContactObservation | None = None
+    calibration_status: dict[str, str] = field(default_factory=dict)
+    calibration_reference: dict = field(default_factory=dict)
 
 
 def contact_from_arrays(
@@ -205,6 +207,9 @@ def from_snapshot(
     asks for it and reads back what the device reports).
     """
     err = str(compute_error or "")
+    snapshot_contact = getattr(snapshot, "contact_found", None)
+    if snapshot_contact is not None:
+        contact_found = snapshot_contact
     if valid is None:
         valid = not err
     stale = bool(err)
@@ -230,6 +235,11 @@ def from_snapshot(
     flow_valid = flow is not None and not stale
     depth_valid = depth is not None and not stale
     calibrated = _force_calibrated(sensor)
+    statuses = dict(getattr(snapshot, "calibration_status", None) or {})
+    units = getattr(snapshot, "force_units", None)
+    axes = tuple(axis for axis, unit in zip(("fn", "fx", "fy"), units) if unit == "N") if units else _calibrated_axes(sensor)
+    if units:
+        calibrated = bool(axes)
     return SdkPacket(
         raw_frame=ensure_bgr(raw_frame) if raw_frame is not None else processed,
         processed_frame=processed,
@@ -257,7 +267,7 @@ def from_snapshot(
         shear_y_raw=float(snapshot.shear_y_raw),
         force_unit=str(snapshot.unit),
         force_calibrated=calibrated,
-        calibrated_axes=_calibrated_axes(sensor),
+        calibrated_axes=axes,
         calibration_version=str(calibration_version or ""),
         session_id=int(session_id),
         frame_id=frame,
@@ -272,8 +282,9 @@ def from_snapshot(
         flow_frame_id=frame if flow_valid else None,
         depth_valid=depth_valid,
         depth_frame_id=frame if depth_valid else None,
-        forces_valid=bool(valid),
+        forces_valid=bool(valid) and all(value == "ok" for value in statuses.values()),
         contact=contact,
+        calibration_status=statuses,
     )
 
 

shared/src/orisys_app_shared/acquisition/sdk_worker.py

@@ -311,6 +311,7 @@ def read_forces_from_sensor(sensor, *, config_ref: str | Path | None = None):
     which would be indistinguishable from a genuine zero reading and would
     silently poison every average built on top of it.
     """
+    sensor = getattr(sensor, "raw_sensor", sensor)
     info = sensor.info
     nan = float("nan")
     fn = fx = fy = nan
@@ -408,6 +409,7 @@ def read_forces_from_sensor(sensor, *, config_ref: str | Path | None = None):
         "valid": valid,
         "invalid_reason": error,
         "raw_available": read_raw,
+        "calibration_status": dict(getattr(sensor, "calibration_status", {}) or {}),
     }
 
 
@@ -640,12 +642,18 @@ def calibration_digest(path: str | Path) -> str:
 
         # A parsed SDK document has no path of its own; hash its content.
         to_dict = getattr(path, "to_dict", None)
+        model_fingerprint = getattr(path, "fingerprint", None)
+        if isinstance(model_fingerprint, str):
+            return model_fingerprint
         if callable(to_dict):
             return hashlib.sha256(
                 json.dumps(to_dict(), sort_keys=True, default=str).encode("utf-8")
             ).hexdigest()
         target = Path(str(path))
         if target.is_file():
+            if json.loads(target.read_text(encoding="utf-8-sig")).get("schema_version") == 3:
+                from orisys.calibration import load
+                return load(target, strict=True).fingerprint
             return hashlib.sha256(target.read_bytes()).hexdigest()
         if not isinstance(path, (str, Path)):
             return hashlib.sha256(
@@ -658,6 +666,7 @@ def calibration_digest(path: str | Path) -> str:
 
 def loaded_path(sensor) -> str | None:
     """Where the sensor's active calibration came from, if it knows."""
+    sensor = getattr(sensor, "raw_sensor", sensor)
     calibration = getattr(sensor, "calibration", None)
     if calibration is None:
         return None
@@ -671,6 +680,7 @@ def loaded_calibration_version(sensor) -> str:
     The sensor may have loaded a product-bundle file while opening, which is
     exactly the set of coefficients the first frames are measured with.
     """
+    sensor = getattr(sensor, "raw_sensor", sensor)
     calibration = getattr(sensor, "calibration", None)
     if calibration is None:
         return ""

shared/src/orisys_app_shared/analysis/bare_video.py

@@ -142,6 +142,7 @@ class BareVideoSetup:
     #: Serial the operator confirmed for ``calibration``. Empty when the pass uses the
     #: bundle's own file or raw force.
     device_id: str | None = None
+    unloaded_reference_frames: int = 0
 
 
 @dataclass(frozen=True)
@@ -335,6 +336,9 @@ def _calibration_identity(path: Path | None) -> str:
         return ""
     try:
         digest = hashlib.sha256(Path(path).read_bytes()).hexdigest()[:12]
+        if json.loads(Path(path).read_text(encoding="utf-8-sig")).get("schema_version") == 3:
+            from orisys.calibration import load
+            digest = load(path, strict=True).fingerprint[:12]
     except OSError:
         return Path(path).name
     return f"{Path(path).name}@{digest}"
@@ -531,6 +535,7 @@ def build_workspace(
         device_id=device_id,
     )
     directory = workspace_directory(identity, root=root)
+    document["synthetic"]["unloaded_reference_frames"] = 0 if setup is None else setup.unloaded_reference_frames
     directory.mkdir(parents=True, exist_ok=True)
     mode = _link_or_copy(resolved, directory / VIDEO_FILENAME)
     document["synthetic"]["video_in_workspace"] = mode

shared/src/orisys_app_shared/analysis/model.py

@@ -542,14 +542,18 @@ class ForceSample:
     def from_reading(cls, reading: Mapping[str, Any]) -> ForceSample:
         """One :func:`~orisys_app_shared.acquisition.sdk_worker.read_forces_from_sensor`
         reading, as this record's own type."""
+        axes = reading.get("calibrated_axes")
+        def newton(axis, key):
+            return float(reading.get(key, _NAN)) if axes is None or axis in axes else _NAN
         return cls(
-            normal=float(reading.get("normal_force", _NAN)),
-            shear_x=float(reading.get("shear_x", _NAN)),
-            shear_y=float(reading.get("shear_y", _NAN)),
+            normal=newton("fn", "normal_force"),
+            shear_x=newton("fx", "shear_x"),
+            shear_y=newton("fy", "shear_y"),
             normal_raw=float(reading.get("normal_force_raw", _NAN)),
             shear_x_raw=float(reading.get("shear_x_raw", _NAN)),
             shear_y_raw=float(reading.get("shear_y_raw", _NAN)),
-            valid=bool(reading.get("valid", True)),
+            valid=bool(reading.get("valid", True)) and all(
+                value == "ok" for value in reading.get("calibration_status", {}).values()),
             calibrated=bool(reading.get("force_calibrated", False)),
         )
 

shared/src/orisys_app_shared/analysis/service.py

@@ -618,9 +618,12 @@ class AnalysisService:
             or dict(session.get("calibration") or {}).get("version")
             or ""
         )
+        zero_frames = int((session.get("synthetic") or {}).get("unloaded_reference_frames", 0))
+        if zero_frames not in (0, 30):
+            raise ValueError("unloaded reference must contain exactly 30 frames")
         key = result_key(
             recording=identity,
-            sensor_config=self.chain.identity(),
+            sensor_config=self.chain.identity() + (";unloaded-reference=30" if zero_frames else ""),
             calibration=calibration,
             reference_frame=self.reference_frame,
         )
@@ -810,6 +813,7 @@ class AnalysisService:
         from orisys_app_shared.acquisition.sdk_worker import process_chain
 
         provenance = state.provenance
+        zero_frames = int((self.reader().session().get("synthetic") or {}).get("unloaded_reference_frames", 0))
         for position, number in enumerate(state.segments):
             if state.reasons or self._stop_requested():
                 if self._stop_requested():
@@ -823,6 +827,7 @@ class AnalysisService:
             if any(row.segment_frame != index + 1 for index, row in enumerate(rows)):
                 provenance.warnings.append(f"segment_frame_gap:{number}")
             with _OpenChain(self.chain, path, state.working) as chain:
+                zero_samples = []
                 offset, measured = self._segment_offset(chain, number, state.offsets)
                 state.offsets[str(number)] = offset
                 state.sources.add("measured" if measured else "declared")
@@ -873,6 +878,22 @@ class AnalysisService:
                         provenance.warnings.append(f"chain:{error}")
                         state.reasons.append(f"chain_failed:{row.frame_id}")
                         return
+                    if zero_frames and (self.reference_frame is None or row.frame_id >= self.reference_frame) and len(zero_samples) < zero_frames:
+                        sensor = getattr(chain.sensor, "raw_sensor", chain.sensor)
+                        model = getattr(sensor, "calibration", None)
+                        if getattr(model, "schema_version", None) != 3:
+                            raise ValueError("unloaded reference requires a schema 3 calibration")
+                        keys = (sensor.info.FNORMAL_RAW, sensor.info.FSHEARX_RAW, sensor.info.FSHEARY_RAW)
+                        values = sensor.read_info(*keys)
+                        if getattr(sensor, "centroid_found", False) or not np.all(np.isfinite(values)):
+                            raise ValueError("unloaded reference contains contact or invalid readings")
+                        zero_samples.append(values)
+                        if len(zero_samples) == zero_frames:
+                            raw = {axis: float(np.median([value[index] for value in zero_samples]))
+                                   for index, axis in enumerate(("fn", "fx", "fy")) if axis in model.channels}
+                            sensor.set_calibration_reference(raw, reference_id=f"video-unloaded-{row.frame_id}")
+                            provenance.counts["unloaded_reference_frames"] = zero_frames
+                            provenance.counts["unloaded_reference_fn_raw"] = raw.get("fn")
                     force = self._read_force(chain)
                     flow = getattr(chain.sensor, "flow", None)
                     if flow is None or not getattr(flow, "size", 0):
@@ -909,6 +930,8 @@ class AnalysisService:
                         depth=depth_array,
                         force=force,
                     )
+                if zero_frames and len(zero_samples) != zero_frames:
+                    raise ValueError("video ended before 30 unloaded reference frames were available")
 
     # ------------------------------------------------------------------- internals
     def _read_force(self, chain: _OpenChain) -> ForceSample | None:

shared/src/orisys_app_shared/force/units.py

@@ -88,7 +88,7 @@ def select_display_forces(*, units_pref: str, sample) -> DisplayForces:
             values.append(float("nan"))
             available.append(False)
 
-    if not any(available):
+    if not any(available) and not getattr(sample, "calibration_status", {}):
         # Nothing is calibrated: showing raw is honest as long as it is labelled.
         return DisplayForces(
             values=raw,

shared/src/orisys_app_shared/record/calibration_snapshot.py

@@ -17,6 +17,7 @@ collide.
 
 from __future__ import annotations
 
+import json
 import logging
 import shutil
 from pathlib import Path
@@ -42,6 +43,23 @@ def store_calibration_snapshot(directory: str | Path, source: str | Path, versio
     base = Path(directory) / SNAPSHOT_DIRNAME
     base.mkdir(parents=True, exist_ok=True)
     origin = Path(source)
+    data = json.loads(origin.read_text(encoding="utf-8-sig"))
+    if data.get("schema_version") == 3:
+        from orisys.calibration import load
+
+        document = load(origin, strict=True)
+        # Keep each model's relative artifact paths in its own immutable directory.
+        package = base / document.fingerprint
+        package.mkdir(parents=True, exist_ok=True)
+        for artifact in data["model"].get("artifacts", []):
+            relative = Path(artifact["path"])
+            destination = package / relative
+            destination.parent.mkdir(parents=True, exist_ok=True)
+            shutil.copy2(origin.parent / relative, destination)
+        target = package / origin.name
+        shutil.copy2(origin, target)
+        load(target, strict=True)
+        return target.relative_to(Path(directory)).as_posix()
     target = base / snapshot_name(version, origin)
     if not target.is_file() or target.stat().st_size != origin.stat().st_size:
         # Same content-addressed name means the same coefficients; a size check
@@ -56,5 +74,5 @@ def list_calibration_snapshots(directory: str | Path) -> list[str]:
     if not base.is_dir():
         return []
     return sorted(
-        f"{SNAPSHOT_DIRNAME}/{path.name}" for path in base.iterdir() if path.is_file()
+        path.relative_to(Path(directory)).as_posix() for path in base.rglob("*") if path.is_file()
     )

shared/src/orisys_app_shared/record/experiment.py

@@ -46,7 +46,7 @@ from orisys_app_shared.record.video_writer import VideoSegments
 
 logger = logging.getLogger(__name__)
 
-RECORD_FORMAT_VERSION = "1.4"
+RECORD_FORMAT_VERSION = "1.5"
 
 # Lifecycle states. ``failed`` and ``stopped`` are terminal; a recorder that has
 # not reached a terminal state must not be reused.
@@ -78,6 +78,8 @@ FORCES_HEADER = (
     "FX_output_N",
     "FY_output_N",
     "Fmag_raw",
+    "calibration_status",
+    "calibration_reference",
 )
 FRAMES_HEADER = (
     "frame_id",
@@ -1152,6 +1154,8 @@ class _SessionWriter:
                 format_value(sample.fx_n_processed),
                 format_value(sample.fy_n_processed),
                 format_value(raw_magnitude(sample.fn_raw, sample.fx_raw, sample.fy_raw)),
+                json.dumps(sample.calibration_status, sort_keys=True),
+                json.dumps(sample.calibration_reference, sort_keys=True),
             )
         )
 

shared/src/orisys_app_shared/record/sample.py

@@ -26,7 +26,7 @@ from __future__ import annotations
 
 import math
 from collections.abc import Iterable
-from dataclasses import dataclass, replace
+from dataclasses import dataclass, field, replace
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:  # numpy is imported lazily, by the one function that needs it
@@ -80,6 +80,8 @@ class RecordSample:
     time_basis: str = ""
     media_time_ms: float | None = None
     capture_dropped: int = 0
+    calibration_status: dict[str, str] = field(default_factory=dict)
+    calibration_reference: dict = field(default_factory=dict)
 
     # ------------------------------------------------------------- accessors
     def raw_triplet(self) -> tuple[float, float, float]:
@@ -183,6 +185,8 @@ def to_record_sample(packet, *, calibration_version: str = "") -> RecordSample:
         "time_basis": str(getattr(packet, "time_basis", "") or ""),
         "media_time_ms": getattr(packet, "media_time_ms", None),
         "capture_dropped": int(getattr(packet, "capture_dropped", 0) or 0),
+        "calibration_status": dict(getattr(packet, "calibration_status", {}) or {}),
+        "calibration_reference": dict(getattr(packet, "calibration_reference", {}) or {}),
     }
 
     if not valid or stale:

shared/tests/test_multical_integration.py

@@ -0,0 +1,184 @@
+"""Model validity, explicit unloaded references and portable schema 3 snapshots."""
+
+import json
+import math
+from types import SimpleNamespace
+
+import numpy as np
+import pytest
+from orisys import calibration
+from orisys.finger import TactileProcessor
+from orisys_app_shared.acquisition.finger_worker import FingerAcquisitionWorker
+from orisys_app_shared.acquisition.sdk_worker import (
+    loaded_calibration_version,
+    read_forces_from_sensor,
+)
+from orisys_app_shared.force.units import select_display_forces
+from orisys_app_shared.record.calibration_snapshot import store_calibration_snapshot
+from orisys_app_shared.record.sample import to_record_sample
+
+
+def model_file(tmp_path):
+    import hashlib
+
+    attachment = tmp_path / "coordinates.npz"
+    np.savez(attachment, uv_by_output_px=np.zeros((2, 2, 2)), valid_mask=np.ones((2, 2), bool))
+    digest = hashlib.sha256(attachment.read_bytes()).hexdigest()
+    data = {
+        "schema_version": 3, "unit": "N", "identity": {"sensor_type": "finger", "sn": "test"},
+        "pipeline": {"feature_signature_sha256": "a" * 64, "geometry_sha256": "b" * 64,
+                     "stitch_resolution": [2, 2], "dis_mode": 1, "hhd_downsample": 3, "source_scale": .42,
+                     "filters": {"measurement": {"flow_ema_alpha": 1.0}},
+                     "coordinates": {"frame": "autocal_flat", "unit": "px", "origin_xy": [0, 0],
+                                     "map_sha256": digest}},
+        "model": {"type": "spatial_gain/1", "input_profile": "fn_delta_autocal_uv/1",
+                  "output_frame": "sdk_force/1", "outputs": ["fn"],
+                  "params": {"points_uv": [[0, 0], [10, 0], [0, 10]],
+                             "gains_N_per_raw": [0.001, 0.002, 0.003], "triangles": [[0, 1, 2]],
+                             "valid_force_range_N": [0, 3]},
+                  "artifacts": [{"role": "coordinate_map", "path": attachment.name, "sha256": digest}]}}
+    path = tmp_path / "model.json"
+    path.write_text(json.dumps(data))
+    return path
+
+
+def test_recorded_model_remains_loadable_without_original_resources(tmp_path):
+    source = model_file(tmp_path)
+    original = calibration.load(source, strict=True)
+    recorded = tmp_path / "recording"
+    relative = store_calibration_snapshot(recorded, source, "version")
+    source.unlink()
+    (tmp_path / "coordinates.npz").unlink()
+    reloaded = calibration.load(recorded / relative, strict=True)
+    assert reloaded.fingerprint == original.fingerprint
+    prediction = reloaded.predict(1, 0, dict(delta_raw=1000, u=2.5, v=2.5,
+                                 zero_valid=True, contact_found=True, mapping_valid=True), "z")
+    assert prediction.values_N["fn"] == pytest.approx(1.75)
+
+
+def test_snapshot_keeps_its_axes_contact_and_status_after_model_swap():
+    from orisys.pipeline import FrameSnapshot
+    from orisys_app_shared.acquisition.models import from_snapshot
+
+    snapshot = FrameSnapshot(seq=0, timestamp=1., age_ms=0., fps=30., unit="N",
+        normal_force=1., shear_x=20., shear_y=30., normal_force_raw=1000., shear_x_raw=20., shear_y_raw=30.,
+        torque=0., produce_ms=0., flow_ms=0., hhd_ms=0., force_units=("N", "raw", "raw"),
+        calibration_status={"fn": "ok"}, contact_found=True, centroid=np.array([2., 3.]))
+    next_sensor = SimpleNamespace(calibration=None, force_calibrated=False, centroid_found=False)
+    packet = from_snapshot(snapshot, next_sensor, contact_analysed=True, contact_found=False)
+    assert packet.calibrated_axes == ("fn",)
+    assert packet.calibration_status == {"fn": "ok"}
+    assert packet.contact.found
+
+
+def test_serial_read_unwraps_tactile_and_preserves_invalid_model_status(tmp_path):
+    model = calibration.load(model_file(tmp_path), strict=True)
+    info = SimpleNamespace(FNORMAL=0, FSHEARX=1, FSHEARY=2, FNORMAL_RAW=3, FSHEARX_RAW=4, FSHEARY_RAW=5)
+    values = [math.nan, 2., 3., 2000., 2., 3.]
+    sensor = SimpleNamespace(info=info, calibration=model, force_calibrated=True,
+                             calibration_status={"fn": "zero_unavailable"},
+                             read_info=lambda *keys: [values[key] for key in keys])
+    tactile = TactileProcessor(sensor)
+    reading = read_forces_from_sensor(tactile)
+    assert reading["calibrated_axes"] == ("fn",)
+    assert reading["calibration_status"] == {"fn": "zero_unavailable"}
+    assert loaded_calibration_version(tactile) == model.fingerprint
+    record = to_record_sample(SimpleNamespace(**reading))
+    assert record.fn_raw == 2000 and math.isnan(record.fn_n)
+    assert record.calibration_status == {"fn": "zero_unavailable"}
+    displayed = select_display_forces(units_pref="newton", sample=record)
+    assert displayed.unit == "N" and not any(displayed.available)
+    assert not displayed.using_raw_fallback
+
+
+def test_zero_is_explicit_complete_and_cancelled_on_contact():
+    applied = []
+    sensor = SimpleNamespace(calibration=SimpleNamespace(schema_version=3, channels={"fn": None}),
+                             centroid_found=False,
+                             set_calibration_reference=lambda raw, **kw: applied.append((raw, kw)))
+    runtime = SimpleNamespace(tactile=SimpleNamespace(raw_sensor=sensor),
+                               set_calibration_reference=sensor.set_calibration_reference)
+    worker = FingerAcquisitionWorker()
+    worker.request_calibration_zero()
+    assert applied == []
+    for index in range(29):
+        worker._collect_zero(runtime, (index, 0, 0), index)
+    assert applied == [({}, {"reference_id": "zero-measurement-pending"})]
+    worker._collect_zero(runtime, (29, 0, 0), 29)
+    assert applied[-1][0] == {"fn": 14.5}
+    assert worker._zero_reference["samples"] == 30
+    worker.request_calibration_zero()
+    sensor.centroid_found = True
+    with pytest.raises(ValueError, match="cancelled"):
+        worker._collect_zero(runtime, (1000, 0, 0), 30)
+    assert applied[-1][0] == {}
+    assert worker._zero_reference == {}
+
+
+def test_resume_cancels_partial_zero_because_tracker_is_rebased():
+    worker = FingerAcquisitionWorker()
+    worker._zero_samples = [(1., 2., 3.)]
+    worker._pipe = SimpleNamespace(resume=lambda **kwargs: None)
+    worker.resume()
+    assert worker._cancel_zero
+
+
+def test_hot_swap_uses_runtime_and_confirmed_serial_then_clears_zero(tmp_path):
+    path = model_file(tmp_path)
+    calls = []
+    runtime = SimpleNamespace(set_calibration=lambda path, **kw: calls.append((path, kw)))
+    worker = FingerAcquisitionWorker()
+    worker._zero_reference = {"raw": {"fn": 123}}
+    worker.set_pending_calibration(path, device_id="test")
+    assert calls == []
+    worker._consume_pending_calibration(runtime, 4, .2)
+    assert calls == [(str(path), {"device_id": "test"})]
+    assert worker._zero_reference == {}
+
+
+@pytest.mark.parametrize("frame_count,contact", [(31, False), (29, False), (31, True)])
+def test_video_unloaded_reference_is_explicit_and_requires_the_whole_interval(monkeypatch, tmp_path, frame_count, contact):
+    from orisys_app_shared.acquisition import sdk_worker
+    from orisys_app_shared.analysis import service
+    from orisys_app_shared.analysis.model import Provenance
+    from orisys_app_shared.record.playback import RecordingFrame
+
+    applied = []
+    sensor = SimpleNamespace(calibration=SimpleNamespace(schema_version=3, channels={"fn": None}),
+                             info=SimpleNamespace(FNORMAL_RAW=0, FSHEARX_RAW=1, FSHEARY_RAW=2),
+                             read_info=lambda *keys: (100., 2., 3.), centroid_found=contact,
+                             set_calibration_reference=lambda raw, **kw: applied.append(raw),
+                             flow=np.zeros((4, 4, 2)), valid_mask=None)
+    class Chain:
+        def __init__(self, *args):
+            self.sensor = sensor
+            self.open_seconds = 0.
+            self.debug_files = []
+            self.index = 0
+        def __enter__(self):
+            return self
+        def __exit__(self, *args):
+            return False
+        def read(self):
+            self.index += 1
+            return (True, np.zeros((4, 4))) if self.index <= frame_count else (False, None)
+        def feed(self, frame):
+            return frame
+
+    monkeypatch.setattr(service, "_OpenChain", Chain)
+    monkeypatch.setattr(sdk_worker, "process_chain", lambda sensor: (None, ""))
+    processor = service.AnalysisService(tmp_path, chain=service.ChainSpec("finger"), store_force=False)
+    reader = SimpleNamespace(session=lambda: {"synthetic": {"unloaded_reference_frames": 30}},
+                             segment_path=lambda number: tmp_path / "clip.mp4")
+    monkeypatch.setattr(processor, "reader", lambda: reader)
+    monkeypatch.setattr(processor, "_segment_offset", lambda *args: (0, True))
+    rows = [RecordingFrame(i + 1, i / 30, "", 1, i + 1, True) for i in range(frame_count)]
+    state = service._PassState(Provenance(), [1], {1: rows}, tmp_path)
+    if frame_count < 30 or contact:
+        with pytest.raises(ValueError):
+            list(processor._pass_frames(state))
+        assert applied == []
+    else:
+        assert len(list(processor._pass_frames(state))) == frame_count
+        assert applied == [{"fn": 100.}]
+        assert state.provenance.counts["unloaded_reference_frames"] == 30