controller: Phase 7 dispatch — set_layout + cell_map (вместо streamselect)

Sync с n7.1-vf-cuda-grid-phase7 filter rework (один cuda_grid + native
runtime layout switching). Изменения:

  dispatch._set_layout:
    target: layout_filter_target (default cuda_grid@cg, был streamselect@layout)
    command: "set_layout <name>"  (был "map <index>")
    validation: PREDEFINED_LAYOUTS (был inst.layout_map)

  dispatch.set_main_cam:
    target: main_cam_filter_target (default cuda_grid@cg, был streamselect@main_cam)
    command: "cell_map <cell> <pad>" × max_cells
    cell 0 = main camera; cells 1..N-1 = identity rotation остальных pads
    (исключая main чтобы не дублировать в preview cells)

  dispatch.set_mpp_main:
    alias к set_main_cam — main_plus_preview тоже использует cell 0 как main.

  config.InstanceCfg:
    layout_filter_target / main_cam_filter_target / mpp_main_filter_target
    default = cuda_grid@cg (Phase 7 single filter)
    new max_cells: int = 4 (соответствует filter max_cells option)
    layout_map deprecated — оставлен для UI subset visibility (HTTP /layouts/{inst})

  http_api.set_layout:
    validation против PREDEFINED_LAYOUTS вместо layout_map

Frigate bridge не меняется — set_main_cam подпись та же (instance, cam_index).

Compile-test OK. Pipeline image: gx/cuda-grid-pipeline:phase7. Controller
image rebuild требуется для deploy.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

controller/cuda_grid_controller/config.py

@@ -101,20 +101,29 @@ class InstanceCfg(BaseModel):
         description="Громкость music когда intercom активен (0.2 = -14 dB)",
     )
     layout_filter_target: str = Field(
-        default="streamselect@layout",
-        description="ZMQ target streamselect filter для runtime layout switching",
+        default="cuda_grid@cg",
+        description="ZMQ target cuda_grid filter (Phase 7) для runtime layout switching "
+                    "(set_layout <name>) и cell remapping (cell_map <cell> <pad>).",
     )
     main_cam_filter_target: str = Field(
-        default="streamselect@main_cam",
-        description="ZMQ target streamselect filter для dynamic main camera (single layout)",
+        default="cuda_grid@cg",
+        description="ZMQ target для cell_map command — single layout main camera. "
+                    "Phase 7: тот же cuda_grid@cg (был streamselect@main_cam).",
     )
     mpp_main_filter_target: str = Field(
-        default="streamselect@mpp_main",
-        description="ZMQ target streamselect filter для dynamic main в main_plus_preview layout",
+        default="cuda_grid@cg",
+        description="ZMQ target для cell_map command — main_plus_preview main camera. "
+                    "Phase 7: тот же cuda_grid@cg (был streamselect@mpp_main).",
+    )
+    max_cells: int = Field(
+        default=4, ge=1, le=16,
+        description="Кол-во input pads cuda_grid filter (Phase 7 max_cells option). "
+                    "Должно совпадать с max_cells в pipeline filter_complex.",
     )
     layout_map: dict[str, int] = Field(
         default_factory=lambda: {"quad": 0, "single": 1, "main_plus_preview": 2},
-        description="layout name → streamselect map index (соответствует pipeline filter_complex)",
+        description="Список доступных layouts (Phase 7: ключи используются для validation, "
+                    "значения игнорируются — cuda_grid resolve'ит layout по имени).",
     )
     snapshot_history: "SnapshotHistoryCfg" = Field(
         default_factory=lambda: SnapshotHistoryCfg(),

controller/cuda_grid_controller/dispatch.py

@@ -183,32 +183,40 @@ class CommandDispatcher:
             )
 
     async def set_main_cam(self, instance: str, cam_index: int) -> None:
-        """Switch single layout main camera через streamselect@main_cam map."""
+        """Phase 7: main camera = cell 0. Sends cuda_grid `cell_map <cell> <pad>`
+        для всех cells: cell 0 = cam_index, остальные = identity rotation
+        (исключая cam_index чтобы не дублировать в preview cells).
+
+        Применимо к любому layout — non-visible cells просто игнорируются
+        при composition (active layout's nb_cells определяет сколько cells
+        фактически отрисовываются)."""
         inst = self._find_instance(instance)
         if inst is None:
             return
+        if not (0 <= cam_index < inst.max_cells):
+            log.warning("dispatch.main_cam_out_of_range",
+                        instance=instance, cam_index=cam_index, max_cells=inst.max_cells)
+            return
+
+        # cell 0 = main; cells 1..max-1 = другие pads без main (стабильный порядок)
+        other_pads = [i for i in range(inst.max_cells) if i != cam_index]
+        cell_assignment = [cam_index] + other_pads
+
         client = self._client(inst)
         try:
-            reply = await client.send_command(
-                inst.main_cam_filter_target, "map", str(cam_index)
-            )
-            log.info("dispatch.main_cam_set", instance=instance, cam_index=cam_index, ffmpeg_reply=reply)
+            for cell_idx, pad_idx in enumerate(cell_assignment):
+                await client.send_command(
+                    inst.main_cam_filter_target, "cell_map", f"{cell_idx} {pad_idx}"
+                )
+            log.info("dispatch.main_cam_set", instance=instance,
+                     cam_index=cam_index, assignment=cell_assignment)
         except (TimeoutError, Exception) as e:
             log.warning("dispatch.main_cam_fail", instance=instance, error=str(e))
 
     async def set_mpp_main(self, instance: str, cam_index: int) -> None:
-        """Switch mpp main camera через streamselect@mpp_main map."""
-        inst = self._find_instance(instance)
-        if inst is None:
-            return
-        client = self._client(inst)
-        try:
-            reply = await client.send_command(
-                inst.mpp_main_filter_target, "map", str(cam_index)
-            )
-            log.info("dispatch.mpp_main_set", instance=instance, cam_index=cam_index, ffmpeg_reply=reply)
-        except (TimeoutError, Exception) as e:
-            log.warning("dispatch.mpp_main_fail", instance=instance, error=str(e))
+        """Phase 7: alias к set_main_cam — main_plus_preview layout также
+        использует cell 0 как main slot. Семантика идентична: cell_map 0 = cam_index."""
+        await self.set_main_cam(instance, cam_index)
 
     async def _reload_icon(self, instance: str, icon_name: str) -> None:
         """Invalidate cached icon atlas во всех cuda_grid instances — каждый
@@ -244,26 +252,30 @@ class CommandDispatcher:
     # ─── Layout ────────────────────────────────────────────────────
 
     async def _set_layout(self, inst: InstanceCfg, layout: str) -> None:
-        if layout not in inst.layout_map:
+        # Phase 7: validation против built-in layouts (mirror of C filter table).
+        # `inst.layout_map` keys могут быть subset (УI-доступные); фактически filter
+        # знает весь PREDEFINED_LAYOUTS и сам ответит ошибкой если name невалиден.
+        if layout not in PREDEFINED_LAYOUTS:
             log.warning(
                 "dispatch.unknown_layout",
                 instance=inst.name,
                 layout=layout,
-                available=list(inst.layout_map.keys()),
+                available=PREDEFINED_LAYOUTS,
             )
             return
 
         old = await self.state.get_layout(inst.name)
         client = self._client(inst)
         try:
+            # Phase 7: cuda_grid имеет native `set_layout <name>` command.
+            # Layout resolve'ится по имени из встроенного PREDEFINED_LAYOUTS таблицы.
             reply = await client.send_command(
-                inst.layout_filter_target, "map", str(inst.layout_map[layout])
+                inst.layout_filter_target, "set_layout", layout
             )
             log.info(
                 "dispatch.layout_set",
                 instance=inst.name,
                 layout=layout,
-                index=inst.layout_map[layout],
                 ffmpeg_reply=reply,
             )
         except (TimeoutError, Exception) as e:

controller/cuda_grid_controller/http_api.py

@@ -82,10 +82,11 @@ def create_app(
 
     @app.post("/layout/{instance}/set")
     async def set_layout(instance: str, req: LayoutSetReq) -> dict[str, Any]:
-        inst = _check_instance(instance)
-        if req.layout not in inst.layout_map:
+        _check_instance(instance)
+        # Phase 7: validation против built-in PREDEFINED_LAYOUTS (filter ground truth).
+        if req.layout not in PREDEFINED_LAYOUTS:
             raise HTTPException(
-                400, f"unknown layout '{req.layout}'. Доступны: {list(inst.layout_map.keys())}"
+                400, f"unknown layout '{req.layout}'. Доступны: {PREDEFINED_LAYOUTS}"
             )
         await dispatcher.handle(instance, "layout.set", req.layout)
         return {"ok": True, "instance": instance, "layout": req.layout}
@@ -93,9 +94,12 @@ def create_app(
     @app.get("/layouts/{instance}")
     async def layouts_for_instance(instance: str) -> dict[str, Any]:
         inst = _check_instance(instance)
+        # UI shows только то что объявлено в config layout_map (subset). Если пуст —
+        # все доступные filter layouts.
+        ui_layouts = list(inst.layout_map.keys()) if inst.layout_map else PREDEFINED_LAYOUTS
         return {
             "instance": instance,
-            "layouts": list(inst.layout_map.keys()),
+            "layouts": ui_layouts,
             "current": await state.get_layout(instance),
         }