Added display-id option to mirror displays that are not displayId=0

app/src/cli.c

@@ -41,6 +41,10 @@ scrcpy_print_usage(const char *arg0) {
         "    -h, --help\n"
         "        Print this help.\n"
         "\n"
+        "    --display-id value\n"
+        "        Specifies the Android display to mirror\n"
+        "        Default is 0\n"
+        "\n"
         "    --max-fps value\n"
         "        Limit the frame rate of screen capture (only supported on\n"
         "        devices with Android >= 10).\n"
@@ -259,6 +263,18 @@ parse_max_fps(const char *s, uint16_t *max_fps) {
     return true;
 }
 
+static bool
+parse_display_id(const char *s, uint16_t *display_id) {
+    long value;
+    bool ok = parse_integer_arg(s, &value, false, 0, 1000, "display id");
+    if (!ok) {
+        return false;
+    }
+
+    *display_id = (uint16_t) value;
+    return true;
+}
+
 static bool
 parse_window_position(const char *s, int16_t *position) {
     long value;
@@ -340,6 +356,7 @@ guess_record_format(const char *filename) {
 #define OPT_WINDOW_HEIGHT         1010
 #define OPT_WINDOW_BORDERLESS     1011
 #define OPT_MAX_FPS               1012
+#define OPT_DISPLAY_ID            1013
 
 bool
 scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
@@ -350,6 +367,7 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         {"fullscreen",            no_argument,       NULL, 'f'},
         {"help",                  no_argument,       NULL, 'h'},
         {"max-fps",               required_argument, NULL, OPT_MAX_FPS},
+        {"display-id",            required_argument, NULL, OPT_DISPLAY_ID},
         {"max-size",              required_argument, NULL, 'm'},
         {"no-control",            no_argument,       NULL, 'n'},
         {"no-display",            no_argument,       NULL, 'N'},
@@ -412,6 +430,11 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
                     return false;
                 }
                 break;
+            case OPT_DISPLAY_ID:
+                if (!parse_display_id(optarg, &opts->display_id)) {
+                    return false;
+                }
+                break;
             case 'm':
                 if (!parse_max_size(optarg, &opts->max_size)) {
                     return false;

app/src/scrcpy.c

@@ -285,6 +285,7 @@ scrcpy(const struct scrcpy_options *options) {
         .bit_rate = options->bit_rate,
         .max_fps = options->max_fps,
         .control = options->control,
+        .display_id = options->display_id,
     };
     if (!server_start(&server, options->serial, &params)) {
         return false;

app/src/scrcpy.h

@@ -32,6 +32,7 @@ struct scrcpy_options {
     bool render_expired_frames;
     bool prefer_text;
     bool window_borderless;
+    uint16_t display_id;
 };
 
 #define SCRCPY_OPTIONS_DEFAULT { \
@@ -58,6 +59,7 @@ struct scrcpy_options {
     .render_expired_frames = false, \
     .prefer_text = false, \
     .window_borderless = false, \
+    .display_id = 0, \
 }
 
 bool

app/src/server.c

@@ -124,9 +124,12 @@ execute_server(struct server *server, const struct server_params *params) {
     char max_size_string[6];
     char bit_rate_string[11];
     char max_fps_string[6];
+    char display_id_string[6];
+
     sprintf(max_size_string, "%"PRIu16, params->max_size);
     sprintf(bit_rate_string, "%"PRIu32, params->bit_rate);
     sprintf(max_fps_string, "%"PRIu16, params->max_fps);
+    sprintf(display_id_string, "%"PRIu16, params->display_id);
     const char *const cmd[] = {
         "shell",
         "CLASSPATH=" DEVICE_SERVER_PATH,
@@ -146,6 +149,7 @@ execute_server(struct server *server, const struct server_params *params) {
         params->crop ? params->crop : "-",
         "true", // always send frame meta (packet boundaries + timestamp)
         params->control ? "true" : "false",
+        display_id_string
     };
 #ifdef SERVER_DEBUGGER
     LOGI("Server debugger waiting for a client on device port "

app/src/server.h

@@ -37,6 +37,7 @@ struct server_params {
     uint32_t bit_rate;
     uint16_t max_fps;
     bool control;
+    uint16_t display_id;
 };
 
 // init default values

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

@@ -26,7 +26,7 @@ public interface RotationListener {
     private RotationListener rotationListener;
 
     public Device(Options options) {
-        screenInfo = computeScreenInfo(options.getCrop(), options.getMaxSize());
+        screenInfo = computeScreenInfo(options.getDisplayId(), options.getCrop(), options.getMaxSize());
         registerRotationWatcher(new IRotationWatcher.Stub() {
             @Override
             public void onRotationChanged(int rotation) throws RemoteException {
@@ -46,8 +46,8 @@ public synchronized ScreenInfo getScreenInfo() {
         return screenInfo;
     }
 
-    private ScreenInfo computeScreenInfo(Rect crop, int maxSize) {
-        DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo();
+    private ScreenInfo computeScreenInfo(int displayId, Rect crop, int maxSize) {
+        DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo(displayId);
         boolean rotated = (displayInfo.getRotation() & 1) != 0;
         Size deviceSize = displayInfo.getSize();
         Rect contentRect = new Rect(0, 0, deviceSize.getWidth(), deviceSize.getHeight());
@@ -64,7 +64,7 @@ private ScreenInfo computeScreenInfo(Rect crop, int maxSize) {
         }
 
         Size videoSize = computeVideoSize(contentRect.width(), contentRect.height(), maxSize);
-        return new ScreenInfo(contentRect, videoSize, rotated);
+        return new ScreenInfo(contentRect, videoSize, rotated, displayInfo.getLayerStack());
     }
 
     private static String formatCrop(Rect rect) {

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

@@ -1,12 +1,20 @@
 package com.genymobile.scrcpy;
 
 public final class DisplayInfo {
+    private final int displayId;
     private final Size size;
     private final int rotation;
+    private final int layerStack;
 
-    public DisplayInfo(Size size, int rotation) {
+    public DisplayInfo(int displayId, Size size, int rotation, int layerStack) {
+        this.displayId = displayId;
         this.size = size;
         this.rotation = rotation;
+        this.layerStack = layerStack;
+    }
+
+    public int getDisplayId() {
+        return displayId;
     }
 
     public Size getSize() {
@@ -16,5 +24,9 @@ public Size getSize() {
     public int getRotation() {
         return rotation;
     }
+
+    public int getLayerStack() {
+        return layerStack;
+    }
 }
 

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

@@ -10,6 +10,7 @@ public class Options {
     private Rect crop;
     private boolean sendFrameMeta; // send PTS so that the client may record properly
     private boolean control;
+    private int displayId;
 
     public int getMaxSize() {
         return maxSize;
@@ -66,4 +67,12 @@ public boolean getControl() {
     public void setControl(boolean control) {
         this.control = control;
     }
+
+    public int getDisplayId() {
+        return displayId;
+    }
+
+    public void setDisplayId(int displayId) {
+        this.displayId = displayId;
+    }
 }

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

@@ -64,10 +64,11 @@ public void streamScreen(Device device, FileDescriptor fd) throws IOException {
                 IBinder display = createDisplay();
                 Rect contentRect = device.getScreenInfo().getContentRect();
                 Rect videoRect = device.getScreenInfo().getVideoSize().toRect();
+                int layerStack = device.getScreenInfo().getLayerStack();
                 setSize(format, videoRect.width(), videoRect.height());
                 configure(codec, format);
                 Surface surface = codec.createInputSurface();
-                setDisplaySurface(display, surface, contentRect, videoRect);
+                setDisplaySurface(display, surface, contentRect, videoRect, layerStack);
                 codec.start();
                 try {
                     alive = encode(codec, fd);
@@ -172,12 +173,12 @@ private static void setSize(MediaFormat format, int width, int height) {
         format.setInteger(MediaFormat.KEY_HEIGHT, height);
     }
 
-    private static void setDisplaySurface(IBinder display, Surface surface, Rect deviceRect, Rect displayRect) {
+    private static void setDisplaySurface(IBinder display, Surface surface, Rect deviceRect, Rect displayRect, int layerStack) {
         SurfaceControl.openTransaction();
         try {
             SurfaceControl.setDisplaySurface(display, surface);
             SurfaceControl.setDisplayProjection(display, 0, deviceRect, displayRect);
-            SurfaceControl.setDisplayLayerStack(display, 0);
+            SurfaceControl.setDisplayLayerStack(display, layerStack);
         } finally {
             SurfaceControl.closeTransaction();
         }

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

@@ -6,11 +6,13 @@ public final class ScreenInfo {
     private final Rect contentRect; // device size, possibly cropped
     private final Size videoSize;
     private final boolean rotated;
+    private final int layerStack;
 
-    public ScreenInfo(Rect contentRect, Size videoSize, boolean rotated) {
+    public ScreenInfo(Rect contentRect, Size videoSize, boolean rotated, int layerStack) {
         this.contentRect = contentRect;
         this.videoSize = videoSize;
         this.rotated = rotated;
+        this.layerStack = layerStack;
     }
 
     public Rect getContentRect() {
@@ -21,11 +23,15 @@ public Size getVideoSize() {
         return videoSize;
     }
 
+    public int getLayerStack() {
+        return layerStack;
+    }
+
     public ScreenInfo withRotation(int rotation) {
         boolean newRotated = (rotation & 1) != 0;
         if (rotated == newRotated) {
             return this;
         }
-        return new ScreenInfo(Device.flipRect(contentRect), videoSize.rotate(), newRotated);
+        return new ScreenInfo(Device.flipRect(contentRect), videoSize.rotate(), newRotated, layerStack);
     }
 }

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

@@ -79,8 +79,8 @@ private static Options createOptions(String... args) {
                     "The server version (" + clientVersion + ") does not match the client " + "(" + BuildConfig.VERSION_NAME + ")");
         }
 
-        if (args.length != 8) {
-            throw new IllegalArgumentException("Expecting 8 parameters");
+        if (args.length != 9) {
+            throw new IllegalArgumentException("Expecting 9 parameters");
         }
 
         Options options = new Options();
@@ -107,6 +107,9 @@ private static Options createOptions(String... args) {
         boolean control = Boolean.parseBoolean(args[7]);
         options.setControl(control);
 
+        int displayId = Integer.parseInt(args[8]);
+        options.setDisplayId(displayId);
+
         return options;
     }
 

server/src/main/java/com/genymobile/scrcpy/wrappers/DisplayManager.java

@@ -13,14 +13,19 @@ public DisplayManager(IInterface manager) {
     }
 
     public DisplayInfo getDisplayInfo() {
+        return getDisplayInfo(0);
+    }
+
+    public DisplayInfo getDisplayInfo(int displayId) {
         try {
-            Object displayInfo = manager.getClass().getMethod("getDisplayInfo", int.class).invoke(manager, 0);
+            Object displayInfo = manager.getClass().getMethod("getDisplayInfo", int.class).invoke(manager, displayId);
             Class<?> cls = displayInfo.getClass();
             // width and height already take the rotation into account
             int width = cls.getDeclaredField("logicalWidth").getInt(displayInfo);
             int height = cls.getDeclaredField("logicalHeight").getInt(displayInfo);
             int rotation = cls.getDeclaredField("rotation").getInt(displayInfo);
-            return new DisplayInfo(new Size(width, height), rotation);
+            int layerStack = cls.getDeclaredField("layerStack").getInt(displayInfo);
+            return new DisplayInfo(displayId, new Size(width, height), rotation, layerStack);
         } catch (Exception e) {
             throw new AssertionError(e);
         }