Configure server verbosity from the client

Send the requested log level from the client.

This paves the way to configure it via a command-line argument.

app/src/server.c

@@ -259,6 +259,11 @@ execute_server(struct server *server, const struct server_params *params) {
         "/", // unused
         "com.genymobile.scrcpy.Server",
         SCRCPY_VERSION,
+#ifndef NDEBUG
+        "debug",
+#else
+        "info",
+#endif
         max_size_string,
         bit_rate_string,
         max_fps_string,

server/src/main/java/com/genymobile/scrcpy/Ln.java

@@ -15,12 +15,23 @@ public final class Ln {
         DEBUG, INFO, WARN, ERROR
     }
 
-    private static final Level THRESHOLD = BuildConfig.DEBUG ? Level.DEBUG : Level.INFO;
+    private static Level THRESHOLD;
 
     private Ln() {
         // not instantiable
     }
 
+    /**
+     * Initialize the log level.
+     * <p>
+     * Must be called before starting any new thread.
+     *
+     * @param level the log level
+     */
+    public static void initLogLevel(Level level) {
+        THRESHOLD = level;
+    }
+
     public static boolean isEnabled(Level level) {
         return level.ordinal() >= THRESHOLD.ordinal();
     }

server/src/main/java/com/genymobile/scrcpy/Options.java

@@ -3,6 +3,7 @@ package com.genymobile.scrcpy;
 import android.graphics.Rect;
 
 public class Options {
+    private Ln.Level logLevel;
     private int maxSize;
     private int bitRate;
     private int maxFps;
@@ -16,6 +17,14 @@ public class Options {
     private boolean stayAwake;
     private String codecOptions;
 
+    public Ln.Level getLogLevel() {
+        return logLevel;
+    }
+
+    public void setLogLevel(Ln.Level logLevel) {
+        this.logLevel = logLevel;
+    }
+
     public int getMaxSize() {
         return maxSize;
     }

server/src/main/java/com/genymobile/scrcpy/Server.java

@@ -119,48 +119,51 @@ public final class Server {
                     "The server version (" + BuildConfig.VERSION_NAME + ") does not match the client " + "(" + clientVersion + ")");
         }
 
-        final int expectedParameters = 13;
+        final int expectedParameters = 14;
         if (args.length != expectedParameters) {
             throw new IllegalArgumentException("Expecting " + expectedParameters + " parameters");
         }
 
         Options options = new Options();
 
-        int maxSize = Integer.parseInt(args[1]) & ~7; // multiple of 8
+        Ln.Level level = Ln.Level.valueOf(args[1].toUpperCase());
+        options.setLogLevel(level);
+
+        int maxSize = Integer.parseInt(args[2]) & ~7; // multiple of 8
         options.setMaxSize(maxSize);
 
-        int bitRate = Integer.parseInt(args[2]);
+        int bitRate = Integer.parseInt(args[3]);
         options.setBitRate(bitRate);
 
-        int maxFps = Integer.parseInt(args[3]);
+        int maxFps = Integer.parseInt(args[4]);
         options.setMaxFps(maxFps);
 
-        int lockedVideoOrientation = Integer.parseInt(args[4]);
+        int lockedVideoOrientation = Integer.parseInt(args[5]);
         options.setLockedVideoOrientation(lockedVideoOrientation);
 
         // use "adb forward" instead of "adb tunnel"? (so the server must listen)
-        boolean tunnelForward = Boolean.parseBoolean(args[5]);
+        boolean tunnelForward = Boolean.parseBoolean(args[6]);
         options.setTunnelForward(tunnelForward);
 
-        Rect crop = parseCrop(args[6]);
+        Rect crop = parseCrop(args[7]);
         options.setCrop(crop);
 
-        boolean sendFrameMeta = Boolean.parseBoolean(args[7]);
+        boolean sendFrameMeta = Boolean.parseBoolean(args[8]);
         options.setSendFrameMeta(sendFrameMeta);
 
-        boolean control = Boolean.parseBoolean(args[8]);
+        boolean control = Boolean.parseBoolean(args[9]);
         options.setControl(control);
 
-        int displayId = Integer.parseInt(args[9]);
+        int displayId = Integer.parseInt(args[10]);
         options.setDisplayId(displayId);
 
-        boolean showTouches = Boolean.parseBoolean(args[10]);
+        boolean showTouches = Boolean.parseBoolean(args[11]);
         options.setShowTouches(showTouches);
 
-        boolean stayAwake = Boolean.parseBoolean(args[11]);
+        boolean stayAwake = Boolean.parseBoolean(args[12]);
         options.setStayAwake(stayAwake);
 
-        String codecOptions = args[12];
+        String codecOptions = args[13];
         options.setCodecOptions(codecOptions);
 
         return options;
@@ -215,6 +218,9 @@ public final class Server {
         });
 
         Options options = createOptions(args);
+
+        Ln.initLogLevel(options.getLogLevel());
+
         scrcpy(options);
     }
 }