Phase 11b: MQTT-overlays конфигурируются через JSON (вместо --temp-topic)

User: "оверлеев которые выводят какую-то инфу из MQTT может быть
бесконечно много. Надо делать настраиваемым через json/yaml конфиг".

Заменили захардкоженный TempMqttOverlay на generic MqttOverlay:

  - cpp/mqtt_overlay.hpp/.cpp: класс MqttOverlayItem (один topic + один
    text overlay) + MqttOverlayManager (контейнер). Загрузка из JSON.
  - cpp/mqtt_overlay_c_api.cpp: extern "C" обёртка для grid_record.c.
  - docker/mqtt_overlays.json: default config с temp_outside примером.
  - grid_record.c: --mqtt-overlays=PATH (заменил --temp-topic).
  - src/CMakeLists.txt: temp_overlay* удалены, mqtt_overlay* добавлены.

JSON schema:
  {
    "overlays": [
      {
        "id": "temp_outside",
        "topic": "zigbee2mqtt/Температура на улице",
        "json_field": "temperature",      // пусто = raw payload string
        "format": "%+.1f°C",                // printf
        "anchor": "right-bottom",           // right-top, left-bottom, ...
        "margin_x": 32, "margin_y": 24,
        "pixel_size": 32,
        "color": [255, 255, 255], "alpha": 230,
        "font_path": "/fonts/DejaVuSans-Bold.ttf"
      }
    ]
  }

MqttBrokerCfg делятся между всеми overlays (one connect_async per item
но shared credentials). Добавление новых overlays = редактирование JSON +
restart cfc-grid (hot-reload через ZMQ — Phase 12).

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

docker/mqtt_overlays.json

@@ -0,0 +1,20 @@
+{
+  "version": 1,
+  "_doc": "MQTT-driven text overlays. Каждый блок = одна MQTT-подписка + persistent text overlay в фиксированной позиции на output frame'е. Не привязан к layout cells. anchor: right-bottom/right-top/left-bottom/left-top/center. format: printf-style для extracted значения (для double — \"%+.1f°C\"). json_field пустой → raw payload как string.",
+
+  "overlays": [
+    {
+      "id": "temp_outside",
+      "topic": "zigbee2mqtt/Температура на улице",
+      "json_field": "temperature",
+      "format": "%+.1f°C",
+      "anchor": "right-bottom",
+      "margin_x": 32,
+      "margin_y": 24,
+      "pixel_size": 32,
+      "color": [255, 255, 255],
+      "alpha": 230,
+      "font_path": "/fonts/DejaVuSans-Bold.ttf"
+    }
+  ]
+}

examples/grid_record.c

@@ -127,7 +127,7 @@ int main(int argc, char **argv)
     const char *frigate_mqtt_host = NULL;
     int frigate_mqtt_port = 1883;
     const char *frigate_topic = "frigate/events";
-    const char *temp_mqtt_topic = NULL;     /* "zigbee2mqtt/<sensor>" — JSON c полем .temperature */
+    const char *mqtt_overlays_path = NULL;  /* JSON-конфиг MQTT-driven text overlays */
     const char *initial_layout = NULL;  /* --layout NAME → set_layout после init */
     int motion_mode = 0;                /* --motion-mode */
     int motion_ttl = 45000;             /* --motion-ttl ms */
@@ -180,7 +180,7 @@ int main(int argc, char **argv)
         {"motion-mode", no_argument,   0, 'm'},  /* enable motion-driven auto layout */
         {"motion-ttl",  required_argument, 0, 'k'},  /* TTL ms (default 45000) */
         {"templates",   required_argument, 0, 'z'},  /* path to templates.json */
-        {"temp-topic",  required_argument, 0, 'x'},  /* zigbee2mqtt topic с температурой */
+        {"mqtt-overlays", required_argument, 0, 'x'},  /* path to MQTT overlays JSON */
         {0, 0, 0, 0},
     };
     const char *templates_path = NULL;
@@ -243,7 +243,7 @@ int main(int argc, char **argv)
         case 'm': motion_mode = 1; break;
         case 'k': motion_ttl = atoi(optarg); break;
         case 'z': templates_path = optarg; break;
-        case 'x': temp_mqtt_topic = optarg; break;
+        case 'x': mqtt_overlays_path = optarg; break;
         case 'S': {
             if (num_sources >= 32) {
                 fprintf(stderr, "max 32 sources\n"); return 1;
@@ -449,18 +449,19 @@ int main(int argc, char **argv)
         cfc_composer_set_motion_mode(comp, 1, motion_ttl);
     }
 
-    /* Глобальный температурный overlay в правом-нижнем углу — Phase 11b.
+    /* Глобальные MQTT-driven overlays (температура и т.п.) — JSON-конфиг.
-     * Подписка на zigbee2mqtt topic; при первом сообщении показывается. */
+     * Каждая запись = MQTT subscribe + persistent text overlay. См.
-    if (temp_mqtt_topic) {
+     * include/cuframes_composer/cpp/mqtt_overlay.hpp для schema. */
-        extern int cfc_temp_overlay_start(cfc_composer_t *, const char *, int,
+    if (mqtt_overlays_path) {
+        extern int cfc_mqtt_overlays_load(cfc_composer_t *, const char *,
+                                            const char *, int,
                                             const char *, const char *,
-                                            const char *, int, int);
+                                            int, int);
-        if (cfc_temp_overlay_start(comp,
+        int n = cfc_mqtt_overlays_load(comp, mqtt_overlays_path,
                 mqtt_host ? mqtt_host : "cctv-mosquitto", mqtt_port,
-                mqtt_user, mqtt_pass, temp_mqtt_topic,
+                mqtt_user, mqtt_pass,
-                out_w, out_h) != 0) {
+                out_w, out_h);
-            fprintf(stderr, "[grid_record] temp overlay start failed\n");
+        fprintf(stderr, "[grid_record] mqtt overlays loaded: %d\n", n);
-        }
     }
 
     /* --layout NAME → applies named layout поверх --cell координат. Удобно

include/cuframes_composer/cpp/mqtt_overlay.hpp

@@ -0,0 +1,113 @@
+/* MqttOverlay — generic MQTT-driven text overlay (Phase 11b).
+ *
+ * Каждый overlay = одна MQTT-подписка + один persistent text overlay.
+ * Конфиг загружается из JSON-файла (mqtt_overlays.json):
+ *   {
+ *     "overlays": [
+ *       { "id": "temp_outside",
+ *         "topic": "zigbee2mqtt/Температура на улице",
+ *         "json_field": "temperature",       // если payload JSON; пусто — raw string
+ *         "format": "%+.1f°C",                 // printf для extracted значения
+ *         "anchor": "right-bottom",            // right-top, left-bottom, ...
+ *         "margin_x": 32, "margin_y": 24,
+ *         "pixel_size": 32,
+ *         "color": [255, 255, 255], "alpha": 230,
+ *         "font_path": "/fonts/DejaVuSans-Bold.ttf"
+ *       }, ...
+ *     ]
+ *   }
+ *
+ * Менеджер (MqttOverlayManager) держит vector<MqttOverlayItem>, поднимает
+ * MQTT-клиентов и добавляет overlays в композер. Hot-reload через
+ * reload_from_file() — пересоздаёт всех subscribers и overlays.
+ *
+ * Лицензия: LGPL-2.1+
+ */
+
+#ifndef CUFRAMES_COMPOSER_CPP_MQTT_OVERLAY_HPP
+#define CUFRAMES_COMPOSER_CPP_MQTT_OVERLAY_HPP
+
+#include "../overlay.h"
+
+#include <atomic>
+#include <memory>
+#include <string>
+#include <vector>
+
+struct mosquitto;
+struct mosquitto_message;
+
+namespace cfc {
+
+struct MqttOverlayCfg {
+    std::string id;
+    std::string topic;
+    std::string json_field;          /* если payload JSON; пусто = raw string */
+    std::string format = "%s";       /* printf-formatted (для double — "%+.1f°C") */
+    std::string anchor = "right-bottom";   /* right-top, left-bottom, ... */
+    int margin_x = 32, margin_y = 24;
+    int pixel_size = 32;
+    int r = 255, g = 255, b = 255;
+    int alpha = 230;
+    std::string font_path = "/fonts/DejaVuSans-Bold.ttf";
+};
+
+struct MqttBrokerCfg {
+    std::string host = "cctv-mosquitto";
+    int port = 1883;
+    std::string username;
+    std::string password;
+};
+
+class MqttOverlayItem {
+public:
+    MqttOverlayItem(const MqttOverlayCfg& cfg, const MqttBrokerCfg& broker,
+                     int frame_w, int frame_h);
+    ~MqttOverlayItem();
+    MqttOverlayItem(const MqttOverlayItem&) = delete;
+    MqttOverlayItem& operator=(const MqttOverlayItem&) = delete;
+
+    bool start();
+    cfc_overlay_t* overlay() const { return overlay_; }
+    const std::string& id() const { return cfg_.id; }
+
+private:
+    static void on_connect(struct mosquitto* m, void* user, int rc);
+    static void on_message(struct mosquitto* m, void* user,
+                            const struct mosquitto_message* msg);
+
+    void handle_payload(const char* payload, std::size_t len);
+    void update_text(const std::string& text);
+    void reposition_overlay();
+
+    MqttOverlayCfg cfg_;
+    MqttBrokerCfg broker_;
+    int frame_w_, frame_h_;
+    struct mosquitto* mosq_ = nullptr;
+    cfc_overlay_t* overlay_ = nullptr;
+    std::atomic<bool> running_{false};
+    std::string last_text_;
+};
+
+class MqttOverlayManager {
+public:
+    explicit MqttOverlayManager(const MqttBrokerCfg& broker) : broker_(broker) {}
+    ~MqttOverlayManager() = default;
+
+    /* Загрузить overlays из JSON-файла. Возвращает количество созданных. */
+    int load_from_file(const std::string& path, int frame_w, int frame_h);
+
+    /* Pointers на overlays для регистрации в композере. */
+    std::vector<cfc_overlay_t*> overlay_handles() const;
+
+    void clear();
+    int size() const { return static_cast<int>(items_.size()); }
+
+private:
+    MqttBrokerCfg broker_;
+    std::vector<std::unique_ptr<MqttOverlayItem>> items_;
+};
+
+} // namespace cfc
+
+#endif /* CUFRAMES_COMPOSER_CPP_MQTT_OVERLAY_HPP */

include/cuframes_composer/cpp/temp_overlay.hpp

@@ -1,90 +0,0 @@
-/* TempMqttOverlay — глобальный overlay температуры (Phase 11b).
- *
- * Не привязан к сеткам/cells: рендерится в фиксированной позиции на output
- * frame'е, поверх любого layout'а. Подписывается на MQTT topic, парсит JSON
- * payload (поле "temperature"), форматирует "+18.5°C", обновляет persistent
- * text overlay.
- *
- * Реализация:
- *   - libmosquitto subscriber в собственном thread'е (loop_start, auto-reconnect)
- *   - json-c для parse JSON payload
- *   - cfc_overlay_t (overlay.c, FreeType atlas) для рендера
- *   - text update через cfc_overlay_update_text — rebuild atlas при смене строки
- *
- * Совместима с прошлой реализацией:
- *   topic = "zigbee2mqtt/Температура на улице"
- *   format = "+18.5°C" (signed, 1 decimal)
- *
- * Лицензия: LGPL-2.1+
- */
-
-#ifndef CUFRAMES_COMPOSER_CPP_TEMP_OVERLAY_HPP
-#define CUFRAMES_COMPOSER_CPP_TEMP_OVERLAY_HPP
-
-#include "../overlay.h"
-
-#include <atomic>
-#include <string>
-#include <thread>
-
-/* Forward declarations — namespace глобальный (libmosquitto на C). */
-struct mosquitto;
-struct mosquitto_message;
-
-namespace cfc {
-
-struct TempOverlayConfig {
-    std::string host = "cctv-mosquitto";
-    int port = 1883;
-    std::string username;
-    std::string password;
-    std::string topic = "zigbee2mqtt/Температура на улице";
-
-    /* Anchor — позиция overlay'я. Координаты пересчитываются после первого
-     * получения текста (нужно знать ширину atlas'а). */
-    int frame_w = 1920;
-    int frame_h = 1080;
-    int margin_right = 32;
-    int margin_bottom = 24;
-    int pixel_size = 32;
-    std::string font_path = "/fonts/DejaVuSans-Bold.ttf";
-    int r = 255, g = 255, b = 255;
-    int alpha = 230;
-
-    /* Префикс перед температурой (например "Улица: "). Пусто — только число. */
-    std::string label_prefix;
-};
-
-class TempMqttOverlay {
-public:
-    explicit TempMqttOverlay(const TempOverlayConfig& cfg);
-    ~TempMqttOverlay();
-
-    TempMqttOverlay(const TempMqttOverlay&) = delete;
-    TempMqttOverlay& operator=(const TempMqttOverlay&) = delete;
-
-    /* Запустить subscriber thread + создать overlay. После start() overlay
-     * добавляется в композитор через add_overlay(). */
-    bool start();
-
-    /* Опаковый pointer на overlay — Composer хранит в overlays_[] для draw. */
-    cfc_overlay_t* overlay() const { return overlay_; }
-
-private:
-    static void on_connect(struct mosquitto* m, void* user, int rc);
-    static void on_message(struct mosquitto* m, void* user, const struct mosquitto_message* msg);
-
-    void handle_payload(const char* payload, std::size_t len);
-    void update_text(const std::string& text);
-    void reposition_overlay();
-
-    TempOverlayConfig cfg_;
-    struct mosquitto* mosq_ = nullptr;
-    cfc_overlay_t* overlay_ = nullptr;
-    std::atomic<bool> running_{false};
-    std::string last_text_;          /* кеш для idempotent update */
-};
-
-} // namespace cfc
-
-#endif /* CUFRAMES_COMPOSER_CPP_TEMP_OVERLAY_HPP */

src/CMakeLists.txt

@@ -37,8 +37,8 @@ set(COMPOSER_SOURCES_CPP
     cpp/composer.cpp
     cpp/composer_c_api.cpp
     cpp/layouts_c_api.cpp
-    cpp/temp_overlay.cpp
+    cpp/mqtt_overlay.cpp
-    cpp/temp_overlay_c_api.cpp
+    cpp/mqtt_overlay_c_api.cpp
 )
 set(COMPOSER_SOURCES_CU
     cugrid/cugrid.cu

src/cpp/mqtt_overlay.cpp

@@ -0,0 +1,297 @@
+/* MqttOverlay — реализация (Phase 11b). */
+
+#include "../../include/cuframes_composer/cpp/mqtt_overlay.hpp"
+
+#include <json-c/json.h>
+#include <mosquitto.h>
+
+#include <cstdio>
+#include <cstring>
+#include <fstream>
+#include <sstream>
+
+namespace cfc {
+
+// ── MqttOverlayItem ──────────────────────────────────────────────────────
+
+MqttOverlayItem::MqttOverlayItem(const MqttOverlayCfg& cfg,
+                                   const MqttBrokerCfg& broker,
+                                   int frame_w, int frame_h)
+    : cfg_(cfg), broker_(broker), frame_w_(frame_w), frame_h_(frame_h)
+{
+    mosquitto_lib_init();
+}
+
+MqttOverlayItem::~MqttOverlayItem()
+{
+    running_.store(false);
+    if (mosq_) {
+        mosquitto_disconnect(mosq_);
+        mosquitto_loop_stop(mosq_, true);
+        mosquitto_destroy(mosq_);
+        mosq_ = nullptr;
+    }
+    /* Overlay ownership — Composer; не уничтожаем. */
+}
+
+void MqttOverlayItem::on_connect(struct mosquitto* m, void* user, int rc)
+{
+    auto* self = static_cast<MqttOverlayItem*>(user);
+    if (rc == 0) {
+        std::fprintf(stderr, "[cfc/mqtt-overlay/%s] connected, subscribe '%s'\n",
+                     self->cfg_.id.c_str(), self->cfg_.topic.c_str());
+        mosquitto_subscribe(m, nullptr, self->cfg_.topic.c_str(), 0);
+    } else {
+        std::fprintf(stderr, "[cfc/mqtt-overlay/%s] connect failed: %s\n",
+                     self->cfg_.id.c_str(), mosquitto_connack_string(rc));
+    }
+}
+
+void MqttOverlayItem::on_message(struct mosquitto*, void* user,
+                                   const struct mosquitto_message* msg)
+{
+    auto* self = static_cast<MqttOverlayItem*>(user);
+    if (!msg || !msg->payload || msg->payloadlen <= 0) return;
+    self->handle_payload(static_cast<const char*>(msg->payload),
+                           static_cast<std::size_t>(msg->payloadlen));
+}
+
+void MqttOverlayItem::handle_payload(const char* payload, std::size_t len)
+{
+    std::string buf(payload, len);
+    std::string text;
+
+    if (!cfg_.json_field.empty()) {
+        struct json_object* root = json_tokener_parse(buf.c_str());
+        if (!root) return;
+        struct json_object* v = nullptr;
+        json_object_object_get_ex(root, cfg_.json_field.c_str(), &v);
+        if (!v) { json_object_put(root); return; }
+
+        char tmp[128];
+        /* Если значение numeric — извлекаем как double, форматируем
+         * printf'ом. Если string — как %s. */
+        if (json_object_is_type(v, json_type_double) ||
+            json_object_is_type(v, json_type_int)) {
+            double d = json_object_get_double(v);
+            std::snprintf(tmp, sizeof(tmp), cfg_.format.c_str(), d);
+        } else {
+            const char* s = json_object_get_string(v);
+            std::snprintf(tmp, sizeof(tmp), cfg_.format.c_str(), s ? s : "");
+        }
+        json_object_put(root);
+        text = tmp;
+    } else {
+        /* Raw payload — format должен быть "%s" или совместимый. */
+        char tmp[256];
+        std::snprintf(tmp, sizeof(tmp), cfg_.format.c_str(), buf.c_str());
+        text = tmp;
+    }
+
+    update_text(text);
+}
+
+void MqttOverlayItem::update_text(const std::string& text)
+{
+    if (text == last_text_) return;
+    last_text_ = text;
+    if (!overlay_) return;
+
+    cfc_overlay_text_config_t tc{};
+    tc.font_path  = cfg_.font_path.c_str();
+    tc.text       = text.c_str();
+    tc.pixel_size = cfg_.pixel_size;
+    tc.x = 0; tc.y = 0;
+    tc.r = cfg_.r; tc.g = cfg_.g; tc.b = cfg_.b;
+    tc.extra_alpha = cfg_.alpha;
+    tc.visible = 1;
+    cfc_overlay_update_text(overlay_, &tc);
+    reposition_overlay();
+    std::fprintf(stderr, "[cfc/mqtt-overlay/%s] '%s'\n",
+                 cfg_.id.c_str(), text.c_str());
+}
+
+void MqttOverlayItem::reposition_overlay()
+{
+    if (!overlay_) return;
+    int w = 0, h = 0;
+    cfc_overlay_text_size(overlay_, &w, &h);
+    if (w <= 0 || h <= 0) return;
+
+    int x = 0, y = 0;
+    if (cfg_.anchor == "right-bottom") {
+        x = frame_w_ - w - cfg_.margin_x;
+        y = frame_h_ - h - cfg_.margin_y;
+    } else if (cfg_.anchor == "right-top") {
+        x = frame_w_ - w - cfg_.margin_x;
+        y = cfg_.margin_y;
+    } else if (cfg_.anchor == "left-bottom") {
+        x = cfg_.margin_x;
+        y = frame_h_ - h - cfg_.margin_y;
+    } else if (cfg_.anchor == "left-top") {
+        x = cfg_.margin_x;
+        y = cfg_.margin_y;
+    } else if (cfg_.anchor == "center") {
+        x = (frame_w_ - w) / 2;
+        y = (frame_h_ - h) / 2;
+    } else {
+        x = cfg_.margin_x; y = cfg_.margin_y;
+    }
+    x &= ~1; y &= ~1;
+    if (x < 0) x = 0;
+    if (y < 0) y = 0;
+
+    cfc_overlay_text_config_t tc{};
+    tc.font_path  = cfg_.font_path.c_str();
+    tc.text       = last_text_.c_str();
+    tc.pixel_size = cfg_.pixel_size;
+    tc.x = x; tc.y = y;
+    tc.r = cfg_.r; tc.g = cfg_.g; tc.b = cfg_.b;
+    tc.extra_alpha = cfg_.alpha;
+    tc.visible = 1;
+    cfc_overlay_update_text(overlay_, &tc);
+}
+
+bool MqttOverlayItem::start()
+{
+    /* Persistent text overlay. */
+    cfc_overlay_text_config_t tc{};
+    tc.font_path  = cfg_.font_path.c_str();
+    tc.text       = "—";
+    tc.pixel_size = cfg_.pixel_size;
+    tc.x = 0; tc.y = 0;
+    tc.r = cfg_.r; tc.g = cfg_.g; tc.b = cfg_.b;
+    tc.extra_alpha = cfg_.alpha;
+    tc.visible = 0;
+    if (cfc_overlay_create_text(&tc, &overlay_) != 0) {
+        std::fprintf(stderr, "[cfc/mqtt-overlay/%s] create_text failed (font '%s')\n",
+                     cfg_.id.c_str(), cfg_.font_path.c_str());
+        return false;
+    }
+    cfc_overlay_set_id(overlay_, cfg_.id.c_str());
+
+    /* MQTT subscriber. */
+    char cid[64];
+    std::snprintf(cid, sizeof(cid), "composer-overlay-%s-%p",
+                  cfg_.id.c_str(), static_cast<void*>(this));
+    mosq_ = mosquitto_new(cid, true, this);
+    if (!mosq_) return false;
+    if (!broker_.username.empty()) {
+        mosquitto_username_pw_set(mosq_, broker_.username.c_str(),
+            broker_.password.empty() ? nullptr : broker_.password.c_str());
+    }
+    mosquitto_connect_callback_set(mosq_, &MqttOverlayItem::on_connect);
+    mosquitto_message_callback_set(mosq_, &MqttOverlayItem::on_message);
+    mosquitto_reconnect_delay_set(mosq_, 1, 30, true);
+
+    int r = mosquitto_connect_async(mosq_, broker_.host.c_str(), broker_.port, 60);
+    if (r != MOSQ_ERR_SUCCESS) {
+        std::fprintf(stderr, "[cfc/mqtt-overlay/%s] connect_async failed: %s\n",
+                     cfg_.id.c_str(), mosquitto_strerror(r));
+        return false;
+    }
+    r = mosquitto_loop_start(mosq_);
+    if (r != MOSQ_ERR_SUCCESS) {
+        std::fprintf(stderr, "[cfc/mqtt-overlay/%s] loop_start failed: %s\n",
+                     cfg_.id.c_str(), mosquitto_strerror(r));
+        return false;
+    }
+    running_.store(true);
+    return true;
+}
+
+// ── MqttOverlayManager ───────────────────────────────────────────────────
+
+namespace {
+const char* jstr(struct json_object* o, const char* k, const char* def = "")
+{
+    struct json_object* v;
+    if (!json_object_object_get_ex(o, k, &v)) return def;
+    return json_object_get_string(v);
+}
+int jint(struct json_object* o, const char* k, int def)
+{
+    struct json_object* v;
+    if (!json_object_object_get_ex(o, k, &v)) return def;
+    return json_object_get_int(v);
+}
+} // namespace
+
+int MqttOverlayManager::load_from_file(const std::string& path, int W, int H)
+{
+    std::ifstream f(path);
+    if (!f.is_open()) {
+        std::fprintf(stderr, "[cfc/mqtt-overlay] %s: open failed\n", path.c_str());
+        return -3;
+    }
+    std::stringstream ss; ss << f.rdbuf();
+    std::string buf = ss.str();
+
+    struct json_object* root = json_tokener_parse(buf.c_str());
+    if (!root) {
+        std::fprintf(stderr, "[cfc/mqtt-overlay] %s: parse failed\n", path.c_str());
+        return -1;
+    }
+    struct json_object* jarr = nullptr;
+    if (!json_object_object_get_ex(root, "overlays", &jarr) ||
+        !json_object_is_type(jarr, json_type_array)) {
+        std::fprintf(stderr, "[cfc/mqtt-overlay] %s: 'overlays' missing\n", path.c_str());
+        json_object_put(root);
+        return -2;
+    }
+
+    clear();
+    int n = static_cast<int>(json_object_array_length(jarr));
+    for (int i = 0; i < n; i++) {
+        struct json_object* jo = json_object_array_get_idx(jarr, i);
+        if (!jo) continue;
+        MqttOverlayCfg cfg;
+        cfg.id         = jstr(jo, "id", "");
+        cfg.topic      = jstr(jo, "topic", "");
+        cfg.json_field = jstr(jo, "json_field", "");
+        cfg.format     = jstr(jo, "format", "%s");
+        cfg.anchor     = jstr(jo, "anchor", "right-bottom");
+        cfg.margin_x   = jint(jo, "margin_x", 32);
+        cfg.margin_y   = jint(jo, "margin_y", 24);
+        cfg.pixel_size = jint(jo, "pixel_size", 32);
+        cfg.alpha      = jint(jo, "alpha", 230);
+        const char* fp = jstr(jo, "font_path", "");
+        if (*fp) cfg.font_path = fp;
+
+        struct json_object* jcolor = nullptr;
+        if (json_object_object_get_ex(jo, "color", &jcolor) &&
+            json_object_is_type(jcolor, json_type_array) &&
+            json_object_array_length(jcolor) >= 3) {
+            cfg.r = json_object_get_int(json_object_array_get_idx(jcolor, 0));
+            cfg.g = json_object_get_int(json_object_array_get_idx(jcolor, 1));
+            cfg.b = json_object_get_int(json_object_array_get_idx(jcolor, 2));
+        }
+
+        if (cfg.id.empty() || cfg.topic.empty()) {
+            std::fprintf(stderr, "[cfc/mqtt-overlay] entry[%d] без id/topic — skip\n", i);
+            continue;
+        }
+
+        auto item = std::make_unique<MqttOverlayItem>(cfg, broker_, W, H);
+        if (item->start()) items_.push_back(std::move(item));
+    }
+    json_object_put(root);
+    std::fprintf(stderr, "[cfc/mqtt-overlay] %s: started %zu overlays\n",
+                 path.c_str(), items_.size());
+    return static_cast<int>(items_.size());
+}
+
+std::vector<cfc_overlay_t*> MqttOverlayManager::overlay_handles() const
+{
+    std::vector<cfc_overlay_t*> v;
+    v.reserve(items_.size());
+    for (auto& i : items_) v.push_back(i->overlay());
+    return v;
+}
+
+void MqttOverlayManager::clear()
+{
+    items_.clear();
+}
+
+} // namespace cfc

src/cpp/mqtt_overlay_c_api.cpp

@@ -0,0 +1,45 @@
+/* C wrapper для MqttOverlayManager (Phase 11b). */
+
+#include "../../include/cuframes_composer/composer.h"
+#include "../../include/cuframes_composer/cpp/mqtt_overlay.hpp"
+
+#include <memory>
+
+namespace {
+std::unique_ptr<cfc::MqttOverlayManager> g_mgr;
+}
+
+extern "C" {
+
+int cfc_mqtt_overlays_load(cfc_composer_t* composer,
+                            const char* path,
+                            const char* mqtt_host, int mqtt_port,
+                            const char* mqtt_user, const char* mqtt_pass,
+                            int frame_w, int frame_h)
+{
+    if (!composer || !path) return -1;
+
+    cfc::MqttBrokerCfg br;
+    if (mqtt_host) br.host = mqtt_host;
+    if (mqtt_port > 0) br.port = mqtt_port;
+    if (mqtt_user) br.username = mqtt_user;
+    if (mqtt_pass) br.password = mqtt_pass;
+
+    g_mgr = std::make_unique<cfc::MqttOverlayManager>(br);
+    int n = g_mgr->load_from_file(path, frame_w, frame_h);
+    if (n <= 0) {
+        g_mgr.reset();
+        return n;
+    }
+    for (cfc_overlay_t* ov : g_mgr->overlay_handles()) {
+        cfc_composer_add_overlay(composer, ov);
+    }
+    return n;
+}
+
+void cfc_mqtt_overlays_stop(void)
+{
+    g_mgr.reset();
+}
+
+} // extern "C"

src/cpp/temp_overlay.cpp

@@ -1,167 +0,0 @@
-/* TempMqttOverlay — реализация (Phase 11b). */
-
-#include "../../include/cuframes_composer/cpp/temp_overlay.hpp"
-#include "../../include/cuframes_composer/overlay.h"
-
-#include <json-c/json.h>
-#include <mosquitto.h>
-
-#include <cstdio>
-#include <cstring>
-
-namespace cfc {
-
-TempMqttOverlay::TempMqttOverlay(const TempOverlayConfig& cfg) : cfg_(cfg)
-{
-    mosquitto_lib_init();
-}
-
-TempMqttOverlay::~TempMqttOverlay()
-{
-    running_.store(false);
-    if (mosq_) {
-        mosquitto_disconnect(mosq_);
-        mosquitto_loop_stop(mosq_, true);
-        mosquitto_destroy(mosq_);
-        mosq_ = nullptr;
-    }
-    /* Overlay уничтожается композером (composer owns overlays_[]). */
-}
-
-void TempMqttOverlay::on_connect(struct mosquitto* m, void* user, int rc)
-{
-    auto* self = static_cast<TempMqttOverlay*>(user);
-    if (rc == 0) {
-        std::fprintf(stderr, "[cfc/temp] connected, subscribe '%s'\n",
-                     self->cfg_.topic.c_str());
-        mosquitto_subscribe(m, nullptr, self->cfg_.topic.c_str(), 0);
-    } else {
-        std::fprintf(stderr, "[cfc/temp] connect failed: %s\n",
-                     mosquitto_connack_string(rc));
-    }
-}
-
-void TempMqttOverlay::on_message(struct mosquitto*, void* user,
-                                   const struct mosquitto_message* msg)
-{
-    auto* self = static_cast<TempMqttOverlay*>(user);
-    if (!msg || !msg->payload || msg->payloadlen <= 0) return;
-    self->handle_payload(static_cast<const char*>(msg->payload),
-                          static_cast<std::size_t>(msg->payloadlen));
-}
-
-void TempMqttOverlay::handle_payload(const char* payload, std::size_t len)
-{
-    /* Payload не nul-terminated. */
-    std::string buf(payload, len);
-
-    struct json_object* root = json_tokener_parse(buf.c_str());
-    if (!root) return;
-
-    struct json_object* jt = nullptr;
-    json_object_object_get_ex(root, "temperature", &jt);
-    if (!jt) { json_object_put(root); return; }
-    double t = json_object_get_double(jt);
-    json_object_put(root);
-
-    char fmt[32];
-    std::snprintf(fmt, sizeof(fmt), "%+.1f°C", t);
-    std::string text = cfg_.label_prefix + std::string(fmt);
-    update_text(text);
-}
-
-void TempMqttOverlay::update_text(const std::string& text)
-{
-    if (text == last_text_) return;
-    last_text_ = text;
-    if (!overlay_) return;
-
-    cfc_overlay_text_config_t tc{};
-    tc.font_path  = cfg_.font_path.c_str();
-    tc.text       = text.c_str();
-    tc.pixel_size = cfg_.pixel_size;
-    tc.x = 0; tc.y = 0;            /* выставится в reposition_overlay */
-    tc.r = cfg_.r; tc.g = cfg_.g; tc.b = cfg_.b;
-    tc.extra_alpha = cfg_.alpha;
-    tc.visible = 1;
-    cfc_overlay_update_text(overlay_, &tc);
-    reposition_overlay();
-    std::fprintf(stderr, "[cfc/temp] update: '%s'\n", text.c_str());
-}
-
-void TempMqttOverlay::reposition_overlay()
-{
-    if (!overlay_) return;
-    int w = 0, h = 0;
-    cfc_overlay_text_size(overlay_, &w, &h);
-    if (w <= 0 || h <= 0) return;
-
-    int x = cfg_.frame_w - w - cfg_.margin_right;
-    int y = cfg_.frame_h - h - cfg_.margin_bottom;
-    x &= ~1; y &= ~1;
-    if (x < 0) x = 0;
-    if (y < 0) y = 0;
-
-    cfc_overlay_text_config_t tc{};
-    tc.font_path  = cfg_.font_path.c_str();
-    tc.text       = last_text_.c_str();
-    tc.pixel_size = cfg_.pixel_size;
-    tc.x = x; tc.y = y;
-    tc.r = cfg_.r; tc.g = cfg_.g; tc.b = cfg_.b;
-    tc.extra_alpha = cfg_.alpha;
-    tc.visible = 1;
-    cfc_overlay_update_text(overlay_, &tc);
-}
-
-bool TempMqttOverlay::start()
-{
-    /* Создаём persistent text overlay (изначально скрытый — visible=0
-     * пока не пришла температура). */
-    cfc_overlay_text_config_t tc{};
-    tc.font_path  = cfg_.font_path.c_str();
-    tc.text       = "—";              /* placeholder, заменится при первом MQTT */
-    tc.pixel_size = cfg_.pixel_size;
-    tc.x = cfg_.frame_w - 100;
-    tc.y = cfg_.frame_h - 50;
-    tc.r = cfg_.r; tc.g = cfg_.g; tc.b = cfg_.b;
-    tc.extra_alpha = cfg_.alpha;
-    tc.visible = 0;
-    if (cfc_overlay_create_text(&tc, &overlay_) != 0) {
-        std::fprintf(stderr, "[cfc/temp] create_text failed (font: %s)\n",
-                     cfg_.font_path.c_str());
-        return false;
-    }
-    cfc_overlay_set_id(overlay_, "temp_outside");
-
-    /* MQTT subscriber. */
-    char cid[64];
-    std::snprintf(cid, sizeof(cid), "composer-temp-%p", static_cast<void*>(this));
-    mosq_ = mosquitto_new(cid, true, this);
-    if (!mosq_) return false;
-    if (!cfg_.username.empty()) {
-        mosquitto_username_pw_set(mosq_, cfg_.username.c_str(),
-            cfg_.password.empty() ? nullptr : cfg_.password.c_str());
-    }
-    mosquitto_connect_callback_set(mosq_, &TempMqttOverlay::on_connect);
-    mosquitto_message_callback_set(mosq_, &TempMqttOverlay::on_message);
-    mosquitto_reconnect_delay_set(mosq_, 1, 30, true);
-
-    int r = mosquitto_connect_async(mosq_, cfg_.host.c_str(), cfg_.port, 60);
-    if (r != MOSQ_ERR_SUCCESS) {
-        std::fprintf(stderr, "[cfc/temp] connect_async failed: %s\n",
-                     mosquitto_strerror(r));
-        return false;
-    }
-    r = mosquitto_loop_start(mosq_);
-    if (r != MOSQ_ERR_SUCCESS) {
-        std::fprintf(stderr, "[cfc/temp] loop_start failed: %s\n",
-                     mosquitto_strerror(r));
-        return false;
-    }
-    running_.store(true);
-    std::fprintf(stderr, "[cfc/temp] subscriber запущен: %s:%d topic=%s\n",
-                 cfg_.host.c_str(), cfg_.port, cfg_.topic.c_str());
-    return true;
-}
-
-} // namespace cfc

src/cpp/temp_overlay_c_api.cpp

@@ -1,49 +0,0 @@
-/* C wrapper для TempMqttOverlay — позволяет grid_record.c (C) поднять
- * температурный overlay через простые extern "C" функции.
- */
-
-#include "../../include/cuframes_composer/cpp/temp_overlay.hpp"
-#include "../../include/cuframes_composer/composer.h"
-
-#include <memory>
-#include <string>
-
-namespace {
-/* singleton — один overlay на процесс grid_record. Если потребуется
- * несколько — расширим, но для прода-композитора одной температуры хватит. */
-std::unique_ptr<cfc::TempMqttOverlay> g_temp;
-}
-
-extern "C" {
-
-int cfc_temp_overlay_start(cfc_composer_t* composer,
-                            const char* mqtt_host, int mqtt_port,
-                            const char* mqtt_user, const char* mqtt_pass,
-                            const char* topic,
-                            int frame_w, int frame_h)
-{
-    if (!composer || !mqtt_host || !topic) return -1;
-    cfc::TempOverlayConfig cfg;
-    cfg.host = mqtt_host;
-    cfg.port = mqtt_port > 0 ? mqtt_port : 1883;
-    if (mqtt_user) cfg.username = mqtt_user;
-    if (mqtt_pass) cfg.password = mqtt_pass;
-    cfg.topic = topic;
-    cfg.frame_w = frame_w;
-    cfg.frame_h = frame_h;
-
-    g_temp = std::make_unique<cfc::TempMqttOverlay>(cfg);
-    if (!g_temp->start()) {
-        g_temp.reset();
-        return -1;
-    }
-    cfc_composer_add_overlay(composer, g_temp->overlay());
-    return 0;
-}
-
-void cfc_temp_overlay_stop(void)
-{
-    g_temp.reset();
-}
-
-} // extern "C"