Add server option send_device_meta

Similar to send_device_frame, this option allows to disable sending the
device name and size on start.

This is only useful when using the scrcpy-server alone to get a raw
H.264 stream, without using the scrcpy client.

PR #2971 <https://github.com/Genymobile/scrcpy/pull/2971>

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

@@ -23,6 +23,7 @@ public class Options {
     private boolean downsizeOnError = true;
 
     // Options not used by the scrcpy client, but useful to use scrcpy-server directly
+    private boolean sendDeviceMeta = true; // send device name and size
     private boolean sendFrameMeta = true; // send PTS so that the client may record properly
 
     public Ln.Level getLogLevel() {
@@ -153,6 +154,14 @@ public class Options {
         this.downsizeOnError = downsizeOnError;
     }
 
+    public boolean getSendDeviceMeta() {
+        return sendDeviceMeta;
+    }
+
+    public void setSendDeviceMeta(boolean sendDeviceMeta) {
+        this.sendDeviceMeta = sendDeviceMeta;
+    }
+
     public boolean getSendFrameMeta() {
         return sendFrameMeta;
     }

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

@@ -68,8 +68,10 @@ public final class Server {
         boolean control = options.getControl();
 
         try (DesktopConnection connection = DesktopConnection.open(tunnelForward, control)) {
-            Size videoSize = device.getScreenInfo().getVideoSize();
-            connection.sendDeviceMeta(Device.getDeviceName(), videoSize.getWidth(), videoSize.getHeight());
+            if (options.getSendDeviceMeta()) {
+                Size videoSize = device.getScreenInfo().getVideoSize();
+                connection.sendDeviceMeta(Device.getDeviceName(), videoSize.getWidth(), videoSize.getHeight());
+            }
             ScreenEncoder screenEncoder = new ScreenEncoder(options.getSendFrameMeta(), options.getBitRate(), options.getMaxFps(), codecOptions,
                     options.getEncoderName(), options.getDownsizeOnError());
 
@@ -238,6 +240,10 @@ public final class Server {
                     boolean downsizeOnError = Boolean.parseBoolean(value);
                     options.setDownsizeOnError(downsizeOnError);
                     break;
+                case "send_device_meta":
+                    boolean sendDeviceMeta = Boolean.parseBoolean(value);
+                    options.setSendDeviceMeta(sendDeviceMeta);
+                    break;
                 case "send_frame_meta":
                     boolean sendFrameMeta = Boolean.parseBoolean(value);
                     options.setSendFrameMeta(sendFrameMeta);