437 lines
13 KiB
C++
437 lines
13 KiB
C++
// mqtt_client_wrapper.cpp
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#include "mqtt_client_wrapper.hpp"
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#include <algorithm>
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#include <chrono>
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#include <condition_variable>
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#include <mutex>
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#include <nlohmann/json.hpp>
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#include <queue>
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#include <thread>
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#include "record_manager.hpp"
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#include "rtmp_manager.hpp"
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std::shared_ptr<MQTTClient> mqtt_client;
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extern std::atomic<bool> g_running;
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std::atomic<bool> g_streaming{false};
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std::string g_dispatch_id;
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std::mutex g_dispatch_id_mutex;
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static std::atomic<bool> g_mqtt_activated{false};
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static std::string g_last_vid;
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static bool try_activate_mqtt()
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{
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if (g_app_config.runtime_vid.empty()) return false;
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if (!mqtt_client || !mqtt_client->isConnected()) return false;
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// 如果已激活且 VID 未变化，什么都不做
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if (g_mqtt_activated.load() && g_last_vid == g_app_config.runtime_vid) return true;
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// ---------- 1. 如果是 VID 变化，先取消旧订阅 ----------
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if (g_mqtt_activated.load())
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{
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LOG_INFO("[MQTT] VID changed, unsubscribe old topics: " + g_last_vid);
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mqtt_client->unsubscribe(g_prev_topics.video_down);
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mqtt_client->unsubscribe(g_prev_topics.record_query);
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mqtt_client->unsubscribe(g_prev_topics.record_play);
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mqtt_client->unsubscribe(g_prev_topics.vehicle_ctrl);
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mqtt_client->unsubscribe(g_prev_topics.heartbeat_up);
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}
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// ---------- 2. 切换到新 VID ----------
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g_app_config.mqtt.topics.fill_with_veh_id(g_app_config.runtime_vid);
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g_prev_topics = g_app_config.mqtt.topics;
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g_last_vid = g_app_config.runtime_vid;
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LOG_INFO("[MQTT] Activated with VID=" + g_last_vid);
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// ---------- 3. 订阅新 topic ----------
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mqtt_client->subscribe(g_app_config.mqtt.topics.video_down);
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mqtt_client->subscribe(g_app_config.mqtt.topics.record_query);
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mqtt_client->subscribe(g_app_config.mqtt.topics.record_play);
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mqtt_client->subscribe(g_app_config.mqtt.topics.vehicle_ctrl);
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g_mqtt_activated.store(true);
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return true;
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}
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static void send_heartbeat()
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{
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if (!mqtt_client || !mqtt_client->isConnected()) return;
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// 获取当前时间戳（13位毫秒）
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auto now = std::chrono::system_clock::now();
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auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()).count();
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// 获取 RTMP 状态
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auto channels_info = RTMPManager::get_all_channels_status();
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nlohmann::json channels = nlohmann::json::array();
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int total = static_cast<int>(channels_info.size());
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int running_count = 0;
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for (const auto& ch : channels_info)
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{
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nlohmann::json item;
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item["loc"] = ch.loc;
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item["running"] = ch.running;
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if (ch.running)
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{
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item["reason"] = nullptr;
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running_count++;
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}
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else
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{
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item["reason"] = ch.reason.empty() ? "Unknown error" : ch.reason;
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}
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channels.push_back(item);
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}
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nlohmann::json hb;
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hb["timestamp"] = ms;
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hb["status"] = (running_count == 0) ? 0 // 全部失败
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: (running_count == total ? 1 : 2); // 全部正常 or 部分异常
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hb["channels"] = channels;
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// 发布心跳
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mqtt_client->publish(g_app_config.mqtt.topics.heartbeat_up, hb.dump(), 0);
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// LOG_INFO("[MQTT] Sent video heartbeat (" + std::to_string(running_count) + "/" + std::to_string(total) +
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// " running): " + hb.dump());
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}
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// MQTT 回调
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static void on_mqtt_connected()
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{
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LOG_INFO("[MQTT] Connected to broker: " + g_app_config.mqtt.server_ip);
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g_mqtt_activated.store(false); // 重连后需要重新激活
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}
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static void on_mqtt_disconnected() { LOG_WARN("[MQTT] Disconnected from broker: " + g_app_config.mqtt.server_ip); }
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static void handle_video_down_request(const nlohmann::json& req)
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{
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if (!req.contains("data") || !req["data"].is_object())
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{
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LOG_WARN("[video_down] Missing data");
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return;
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}
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int sw = req["data"].value("switch", 0);
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if (sw != 1)
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{
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LOG_INFO("[video_down] switch != 1, ignore");
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return;
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}
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// 取得当前所有 RTMP 播放地址
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auto channels_info = RTMPManager::get_all_channels_status();
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// 构造响应
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nlohmann::json resp;
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resp["type"] = "response";
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resp["seqNo"] = req.value("seqNo", "0");
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resp["data"] = nlohmann::json::array();
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int loc = 0;
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for (const auto& ch : channels_info)
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{
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resp["data"].push_back({{"loc", loc}, {"url", ch.url}});
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loc++;
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}
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// 发布回复
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mqtt_client->publish(g_app_config.mqtt.topics.video_down, resp.dump(-1), 1);
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}
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static void handle_record_query_request(const nlohmann::json& req)
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{
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// 1. 解析字段
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if (!req.contains("data") || !req["data"].is_object())
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{
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LOG_WARN("[record_query] missing data");
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return;
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}
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const auto& d = req["data"];
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int loc = d.value("loc", -1);
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int64_t start = d.value("startTime", -1LL);
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int64_t end = d.value("endTime", -1LL);
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if (loc < 0 || start <= 0 || end <= 0 || start >= end)
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{
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LOG_WARN("[record_query] invalid parameters");
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return;
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}
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LOG_INFO("[record_query] loc=" + std::to_string(loc) + " start=" + std::to_string(start) +
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" end=" + std::to_string(end));
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// 2. 计算 stream 名
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// loc → stream，比如：
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// 0 → "AHD1_main"
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std::string stream = RecordManager::loc_to_stream(loc);
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if (stream.empty())
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{
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LOG_WARN("[record_query] invalid loc: " + std::to_string(loc));
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return;
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}
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// 3. 向 RecordManager 查询录像段
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auto segs = g_record_manager->querySegments(stream, start, end);
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LOG_INFO("[record_query] Found segments=" + std::to_string(segs.size()));
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// 4. 构造响应 JSON
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nlohmann::json resp;
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resp["type"] = "response";
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resp["seqNo"] = req.value("seqNo", "0");
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nlohmann::json data;
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data["loc"] = loc;
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data["segments"] = nlohmann::json::array();
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int idx = 1;
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for (const auto& seg : segs)
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{
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nlohmann::json s;
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s["index"] = idx++;
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s["segmentId"] = seg.segment_id;
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s["startTime"] = seg.start_ms;
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s["endTime"] = seg.end_ms;
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data["segments"].push_back(s);
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}
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resp["data"] = data;
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// 5. 发送 MQTT
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mqtt_client->publish(g_app_config.mqtt.topics.record_query, resp.dump(-1), 1);
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}
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static void handle_record_play_request(const nlohmann::json& req)
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{
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// 1. 解析参数
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if (!req.contains("data") || !req["data"].is_object())
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{
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LOG_WARN("[record_play] missing data");
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return;
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}
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const auto& d = req["data"];
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int loc = d.value("loc", -1);
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std::string segmentId = d.value("segmentId", "");
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if (loc < 0 || segmentId.empty())
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{
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LOG_WARN("[record_play] invalid parameters");
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return;
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}
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LOG_INFO("[record_play] loc=" + std::to_string(loc) + " segmentId=" + segmentId);
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// 2. 根据 segmentId 获取录像段
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auto seg = g_record_manager->getSegment(segmentId);
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if (seg.files.empty())
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{
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LOG_WARN("[record_play] no files found for segmentId: " + segmentId);
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return;
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}
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// 3. 计算总时长
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int64_t duration = seg.end_ms - seg.start_ms;
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// 4. 获取播放地址前缀
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std::string ip = get_ip_address("enP2p33s0");
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if (ip.empty()) ip = "127.0.0.1";
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int http_port = g_record_manager->getHttpPort();
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// 5. 构造响应
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nlohmann::json resp;
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resp["type"] = "response";
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resp["seqNo"] = req.value("seqNo", "0");
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nlohmann::json data;
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data["loc"] = loc;
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data["segmentId"] = segmentId;
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data["startTime"] = seg.start_ms;
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data["endTime"] = seg.end_ms;
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data["duration"] = duration;
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int index = 1;
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// 6. 单文件列表
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nlohmann::json files = nlohmann::json::array();
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for (auto& f : seg.files)
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{
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nlohmann::json item;
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item["index"] = index++;
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item["url"] = "http://" + ip + ":" + std::to_string(http_port) + f.path;
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item["startTime"] = f.start_ms;
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item["endTime"] = f.end_ms;
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files.push_back(item);
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}
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data["files"] = files;
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resp["data"] = data;
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// 7. 回复 MQTT
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mqtt_client->publish(g_app_config.mqtt.topics.record_play, resp.dump(), 1);
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}
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static void handle_vehicle_ctrl_request(const nlohmann::json& req)
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{
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std::string cmd = req.value("command", "");
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int value = req.value("value", 0);
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// value 固定为 1，不是 1 直接忽略
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if (value != 1)
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{
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LOG_WARN("[vehicle_ctrl] ignore command=" + cmd + " value=" + std::to_string(value));
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return;
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}
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if (cmd == "startCtrl")
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{
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LOG_INFO("[vehicle_ctrl] startCtrl → start all RTMP");
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RTMPManager::start_all();
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g_streaming.store(true);
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return;
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}
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if (cmd == "stopCtrl")
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{
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LOG_INFO("[vehicle_ctrl] stopCtrl → stop all RTMP");
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RTMPManager::stop_all();
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g_streaming.store(false);
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return;
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}
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LOG_WARN("[vehicle_ctrl] unknown command: " + cmd);
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}
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static void on_mqtt_message_received(const std::string& topic, const std::string& message)
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{
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try
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{
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auto j = nlohmann::json::parse(message);
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LOG_INFO("[MQTT] Received message on [" + topic + "]");
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LOG_INFO("[MQTT] Payload: " + j.dump(-1));
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// ===============================
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// 1. vehicle_ctrl：放宽协议限制
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// ===============================
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if (topic == g_app_config.mqtt.topics.vehicle_ctrl)
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{
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// vehicle_ctrl 只要求有 command
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if (!j.contains("command"))
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{
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LOG_WARN("[MQTT] vehicle_ctrl missing 'command'");
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return;
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}
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handle_vehicle_ctrl_request(j);
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return;
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}
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// ==========================================
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// 2. 其他 topic：必须是 type=request
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// ==========================================
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if (!j.contains("type") || j["type"] != "request")
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{
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// 非 request 的消息直接忽略
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return;
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}
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// ===============================
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// 3. 按 topic 分发
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// ===============================
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if (topic == g_app_config.mqtt.topics.video_down)
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{
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handle_video_down_request(j);
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}
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else if (topic == g_app_config.mqtt.topics.record_query)
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{
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handle_record_query_request(j);
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}
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else if (topic == g_app_config.mqtt.topics.record_play)
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{
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handle_record_play_request(j);
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}
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else
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{
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LOG_WARN("[MQTT] Unknown topic: " + topic);
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}
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}
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catch (const std::exception& e)
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{
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LOG_ERROR(std::string("[MQTT] Failed to process incoming JSON: ") + e.what());
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}
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}
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void mqtt_client_thread_func()
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{
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const auto& cfg = g_app_config.mqtt;
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auto heartbeat_interval = std::chrono::milliseconds(static_cast<int>(cfg.keep_alive * 0.9));
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while (g_running)
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{
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mqtt_client = std::make_unique<MQTTClient>(cfg);
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mqtt_client->setConnectCallback(on_mqtt_connected);
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mqtt_client->setDisconnectCallback(on_mqtt_disconnected);
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mqtt_client->setMessageCallback(on_mqtt_message_received);
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// 等待连接
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while (g_running && !mqtt_client->isConnected())
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{
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mqtt_client->connect();
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for (int i = 0; i < 10 && g_running && !mqtt_client->isConnected(); i++)
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std::this_thread::sleep_for(std::chrono::milliseconds(50));
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if (!g_running && !mqtt_client->isConnected()) mqtt_client->force_disconnect();
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}
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// 主循环：心跳
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while (g_running && mqtt_client->isConnected())
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{
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try_activate_mqtt(); // VID 到来时触发订阅
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if (g_mqtt_activated.load())
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{
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send_heartbeat();
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}
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auto sleep_time = heartbeat_interval;
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while (sleep_time.count() > 0 && g_running && mqtt_client->isConnected())
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{
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auto chunk = std::min(sleep_time, std::chrono::milliseconds(50));
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std::this_thread::sleep_for(chunk);
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sleep_time -= chunk;
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}
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if (!g_running && mqtt_client->isConnected()) mqtt_client->force_disconnect();
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}
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// 清理
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if (mqtt_client)
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{
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if (g_running)
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mqtt_client->disconnect();
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else
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mqtt_client->force_disconnect();
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mqtt_client.reset();
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}
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if (!g_running) break;
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// 短暂等待再重连
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for (int i = 0; i < 5 && g_running; i++) std::this_thread::sleep_for(std::chrono::milliseconds(200));
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}
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LOG_INFO("[MQTT] Client thread exiting.");
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}
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