Pipe cscore logs through photonvision (#1260)

This means we can see even more logs about mjpeg server status as well

photon-core/src/main/java/org/photonvision/common/logging/LogGroup.java

@@ -23,5 +23,6 @@ public enum LogGroup {
     VisionModule,
     Data,
     General,
-    Config
+    Config,
+    CSCore,
 }

photon-core/src/main/java/org/photonvision/common/logging/Logger.java

@@ -99,6 +99,7 @@ public class Logger {
         levelMap.put(LogGroup.Data, LogLevel.INFO);
         levelMap.put(LogGroup.VisionModule, LogLevel.INFO);
         levelMap.put(LogGroup.Config, LogLevel.INFO);
+        levelMap.put(LogGroup.CSCore, LogLevel.TRACE);
     }
 
     static {
@@ -194,7 +195,7 @@ public class Logger {
         return logLevel.code <= levelMap.get(group).code;
     }
 
-    private void log(String message, LogLevel level) {
+    void log(String message, LogLevel level) {
         if (shouldLog(level)) {
             log(message, level, group, className);
         }

photon-core/src/main/java/org/photonvision/common/logging/PvCSCoreLogger.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) Photon Vision.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.photonvision.common.logging;
+
+import edu.wpi.first.cscore.CameraServerJNI;
+import java.nio.file.Path;
+
+/** Redirect cscore logs to our logger */
+public class PvCSCoreLogger {
+    private static PvCSCoreLogger INSTANCE;
+
+    public static PvCSCoreLogger getInstance() {
+        if (INSTANCE == null) {
+            INSTANCE = new PvCSCoreLogger();
+        }
+        return INSTANCE;
+    }
+
+    private Logger logger;
+
+    private PvCSCoreLogger() {
+        CameraServerJNI.setLogger(this::logMsg, 7);
+        this.logger = new Logger(getClass(), LogGroup.CSCore);
+    }
+
+    private void logMsg(int level, String file, int line, String msg) {
+        if (level == 20) {
+            logger.info(msg);
+            return;
+        }
+
+        file = Path.of(file).getFileName().toString();
+
+        String levelmsg;
+        LogLevel pvlevel;
+        if (level >= 50) {
+            levelmsg = "CRITICAL";
+            pvlevel = LogLevel.ERROR;
+        } else if (level >= 40) {
+            levelmsg = "ERROR";
+            pvlevel = LogLevel.ERROR;
+        } else if (level >= 30) {
+            levelmsg = "WARNING";
+            pvlevel = LogLevel.WARN;
+        } else if (level >= 20) {
+            levelmsg = "INFO";
+            pvlevel = LogLevel.INFO;
+        } else {
+            levelmsg = "DEBUG";
+            pvlevel = LogLevel.DEBUG;
+        }
+        logger.log(
+                "CS: " + levelmsg + " " + level + ": " + msg + " (" + file + ":" + line + ")", pvlevel);
+    }
+}

photon-server/src/main/java/org/photonvision/Main.java

@@ -35,6 +35,7 @@ import org.photonvision.common.hardware.Platform;
 import org.photonvision.common.logging.LogGroup;
 import org.photonvision.common.logging.LogLevel;
 import org.photonvision.common.logging.Logger;
+import org.photonvision.common.logging.PvCSCoreLogger;
 import org.photonvision.common.networking.NetworkManager;
 import org.photonvision.common.util.TestUtils;
 import org.photonvision.common.util.numbers.IntegerCouple;
@@ -409,6 +410,8 @@ public class Main {
                         + Platform.getPlatformName()
                         + (Platform.isRaspberryPi() ? (" (Pi " + PiVersion.getPiVersion() + ")") : ""));
 
+        PvCSCoreLogger.getInstance();
+
         logger.debug("Loading ConfigManager...");
         ConfigManager.getInstance().load(); // init config manager
         ConfigManager.getInstance().requestSave();