Add option to lock video orientation

Signed-off-by: Romain Vimont <[email protected]>

README.md

@@ -177,6 +177,21 @@ scrcpy --crop 1224:1440:0:0   # 1224x1440 at offset (0,0)
 If `--max-size` is also specified, resizing is applied after cropping.
 
 
+#### Lock video orientation
+
+
+To lock the orientation of the mirroring:
+
+```bash
+scrcpy --lock-video-orientation 0   # natural orientation
+scrcpy --lock-video-orientation 1   # 90° counterclockwise
+scrcpy --lock-video-orientation 2   # 180°
+scrcpy --lock-video-orientation 3   # 90° clockwise
+```
+
+This affects recording orientation.
+
+
 ### Recording
 
 It is possible to record the screen while mirroring:

app/meson.build

@@ -106,6 +106,12 @@ conf.set('DEFAULT_LOCAL_PORT', '27183')
 # overridden by option --max-size
 conf.set('DEFAULT_MAX_SIZE', '0')  # 0: unlimited
 
+# the default video orientation
+# natural device orientation is 0 and each increment adds 90 degrees
+# counterclockwise
+# overridden by option --lock-video-orientation
+conf.set('DEFAULT_LOCK_VIDEO_ORIENTATION', '-1')  # -1: unlocked
+
 # the default video bitrate, in bits/second
 # overridden by option --bit-rate
 conf.set('DEFAULT_BIT_RATE', '8000000')  # 8Mbps

app/scrcpy.1

@@ -41,6 +41,12 @@ Start in fullscreen.
 .B \-h, \-\-help
 Print this help.
 
+.TP
+.BI "\-\-lock\-video\-orientation " value
+Lock video orientation to \fIvalue\fR. Values are integers in the range [-1..3]. Natural device orientation is 0 and each increment adds 90 degrees counterclockwise.
+
+Default is -1 (unlocked).
+
 .TP
 .BI "\-\-max\-fps " value
 Limit the framerate of screen capture (only supported on devices with Android >= 10).

app/src/cli.c

@@ -41,6 +41,12 @@ scrcpy_print_usage(const char *arg0) {
         "    -h, --help\n"
         "        Print this help.\n"
         "\n"
+        "    --lock-video-orientation value\n"
+        "        Lock video orientation to value. Values are integers in the\n"
+        "        range [-1..3]. Natural device orientation is 0 and each\n"
+        "        increment adds 90 degrees counterclockwise.\n"
+        "        Default is %d%s.\n"
+        "\n"
         "    --max-fps value\n"
         "        Limit the frame rate of screen capture (only supported on\n"
         "        devices with Android >= 10).\n"
@@ -193,6 +199,7 @@ scrcpy_print_usage(const char *arg0) {
         arg0,
         DEFAULT_BIT_RATE,
         DEFAULT_MAX_SIZE, DEFAULT_MAX_SIZE ? "" : " (unlimited)",
+        DEFAULT_LOCK_VIDEO_ORIENTATION, DEFAULT_LOCK_VIDEO_ORIENTATION >= 0 ? "" : " (unlocked)",
         DEFAULT_LOCAL_PORT);
 }
 
@@ -259,6 +266,19 @@ parse_max_fps(const char *s, uint16_t *max_fps) {
     return true;
 }
 
+static bool
+parse_lock_video_orientation(const char *s, int8_t *lock_video_orientation) {
+    long value;
+    bool ok = parse_integer_arg(s, &value, false, -1, 3,
+                                "lock video orientation");
+    if (!ok) {
+        return false;
+    }
+
+    *lock_video_orientation = (int8_t) value;
+    return true;
+}
+
 static bool
 parse_window_position(const char *s, int16_t *position) {
     long value;
@@ -327,51 +347,54 @@ guess_record_format(const char *filename) {
     return 0;
 }
 
-#define OPT_RENDER_EXPIRED_FRAMES 1000
-#define OPT_WINDOW_TITLE          1001
-#define OPT_PUSH_TARGET           1002
-#define OPT_ALWAYS_ON_TOP         1003
-#define OPT_CROP                  1004
-#define OPT_RECORD_FORMAT         1005
-#define OPT_PREFER_TEXT           1006
-#define OPT_WINDOW_X              1007
-#define OPT_WINDOW_Y              1008
-#define OPT_WINDOW_WIDTH          1009
-#define OPT_WINDOW_HEIGHT         1010
-#define OPT_WINDOW_BORDERLESS     1011
-#define OPT_MAX_FPS               1012
+#define OPT_RENDER_EXPIRED_FRAMES  1000
+#define OPT_WINDOW_TITLE           1001
+#define OPT_PUSH_TARGET            1002
+#define OPT_ALWAYS_ON_TOP          1003
+#define OPT_CROP                   1004
+#define OPT_RECORD_FORMAT          1005
+#define OPT_PREFER_TEXT            1006
+#define OPT_WINDOW_X               1007
+#define OPT_WINDOW_Y               1008
+#define OPT_WINDOW_WIDTH           1009
+#define OPT_WINDOW_HEIGHT          1010
+#define OPT_WINDOW_BORDERLESS      1011
+#define OPT_MAX_FPS                1012
+#define OPT_LOCK_VIDEO_ORIENTATION 1013
 
 bool
 scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
     static const struct option long_options[] = {
-        {"always-on-top",         no_argument,       NULL, OPT_ALWAYS_ON_TOP},
-        {"bit-rate",              required_argument, NULL, 'b'},
-        {"crop",                  required_argument, NULL, OPT_CROP},
-        {"fullscreen",            no_argument,       NULL, 'f'},
-        {"help",                  no_argument,       NULL, 'h'},
-        {"max-fps",               required_argument, NULL, OPT_MAX_FPS},
-        {"max-size",              required_argument, NULL, 'm'},
-        {"no-control",            no_argument,       NULL, 'n'},
-        {"no-display",            no_argument,       NULL, 'N'},
-        {"port",                  required_argument, NULL, 'p'},
-        {"push-target",           required_argument, NULL, OPT_PUSH_TARGET},
-        {"record",                required_argument, NULL, 'r'},
-        {"record-format",         required_argument, NULL, OPT_RECORD_FORMAT},
-        {"render-expired-frames", no_argument,       NULL,
-                                                     OPT_RENDER_EXPIRED_FRAMES},
-        {"serial",                required_argument, NULL, 's'},
-        {"show-touches",          no_argument,       NULL, 't'},
-        {"turn-screen-off",       no_argument,       NULL, 'S'},
-        {"prefer-text",           no_argument,       NULL, OPT_PREFER_TEXT},
-        {"version",               no_argument,       NULL, 'v'},
-        {"window-title",          required_argument, NULL, OPT_WINDOW_TITLE},
-        {"window-x",              required_argument, NULL, OPT_WINDOW_X},
-        {"window-y",              required_argument, NULL, OPT_WINDOW_Y},
-        {"window-width",          required_argument, NULL, OPT_WINDOW_WIDTH},
-        {"window-height",         required_argument, NULL, OPT_WINDOW_HEIGHT},
-        {"window-borderless",     no_argument,       NULL,
-                                                     OPT_WINDOW_BORDERLESS},
-        {NULL,                    0,                 NULL, 0  },
+        {"always-on-top",          no_argument,       NULL, OPT_ALWAYS_ON_TOP},
+        {"bit-rate",               required_argument, NULL, 'b'},
+        {"crop",                   required_argument, NULL, OPT_CROP},
+        {"fullscreen",             no_argument,       NULL, 'f'},
+        {"help",                   no_argument,       NULL, 'h'},
+        {"lock-video-orientation", required_argument, NULL,
+                                                  OPT_LOCK_VIDEO_ORIENTATION},
+        {"max-fps",                required_argument, NULL, OPT_MAX_FPS},
+        {"max-size",               required_argument, NULL, 'm'},
+        {"no-control",             no_argument,       NULL, 'n'},
+        {"no-display",             no_argument,       NULL, 'N'},
+        {"port",                   required_argument, NULL, 'p'},
+        {"push-target",            required_argument, NULL, OPT_PUSH_TARGET},
+        {"record",                 required_argument, NULL, 'r'},
+        {"record-format",          required_argument, NULL, OPT_RECORD_FORMAT},
+        {"render-expired-frames",  no_argument,       NULL,
+                                                  OPT_RENDER_EXPIRED_FRAMES},
+        {"serial",                 required_argument, NULL, 's'},
+        {"show-touches",           no_argument,       NULL, 't'},
+        {"turn-screen-off",        no_argument,       NULL, 'S'},
+        {"prefer-text",            no_argument,       NULL, OPT_PREFER_TEXT},
+        {"version",                no_argument,       NULL, 'v'},
+        {"window-title",           required_argument, NULL, OPT_WINDOW_TITLE},
+        {"window-x",               required_argument, NULL, OPT_WINDOW_X},
+        {"window-y",               required_argument, NULL, OPT_WINDOW_Y},
+        {"window-width",           required_argument, NULL, OPT_WINDOW_WIDTH},
+        {"window-height",          required_argument, NULL, OPT_WINDOW_HEIGHT},
+        {"window-borderless",      no_argument,       NULL,
+                                                  OPT_WINDOW_BORDERLESS},
+        {NULL,                     0,                 NULL, 0  },
     };
 
     struct scrcpy_options *opts = &args->opts;
@@ -417,6 +440,11 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
                     return false;
                 }
                 break;
+            case OPT_LOCK_VIDEO_ORIENTATION:
+                if (!parse_lock_video_orientation(optarg, &opts->lock_video_orientation)) {
+                    return false;
+                }
+                break;
             case 'n':
                 opts->control = false;
                 break;

app/src/scrcpy.c

@@ -284,6 +284,7 @@ scrcpy(const struct scrcpy_options *options) {
         .max_size = options->max_size,
         .bit_rate = options->bit_rate,
         .max_fps = options->max_fps,
+        .lock_video_orientation = options->lock_video_orientation,
         .control = options->control,
     };
     if (!server_start(&server, options->serial, &params)) {

app/src/scrcpy.h

@@ -19,6 +19,7 @@ struct scrcpy_options {
     uint16_t max_size;
     uint32_t bit_rate;
     uint16_t max_fps;
+    int8_t lock_video_orientation;
     int16_t window_x;
     int16_t window_y;
     uint16_t window_width;
@@ -45,6 +46,7 @@ struct scrcpy_options {
     .max_size = DEFAULT_MAX_SIZE, \
     .bit_rate = DEFAULT_BIT_RATE, \
     .max_fps = 0, \
+    .lock_video_orientation = DEFAULT_LOCK_VIDEO_ORIENTATION, \
     .window_x = -1, \
     .window_y = -1, \
     .window_width = 0, \

app/src/server.c

@@ -124,9 +124,11 @@ 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 lock_video_orientation_string[3];
     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(lock_video_orientation_string, "%"PRIi8, params->lock_video_orientation);
     const char *const cmd[] = {
         "shell",
         "CLASSPATH=" DEVICE_SERVER_PATH,
@@ -142,6 +144,7 @@ execute_server(struct server *server, const struct server_params *params) {
         max_size_string,
         bit_rate_string,
         max_fps_string,
+        lock_video_orientation_string,
         server->tunnel_forward ? "true" : "false",
         params->crop ? params->crop : "-",
         "true", // always send frame meta (packet boundaries + timestamp)

app/src/server.h

@@ -36,6 +36,7 @@ struct server_params {
     uint16_t max_size;
     uint32_t bit_rate;
     uint16_t max_fps;
+    int8_t lock_video_orientation;
     bool control;
 };
 

app/tests/test_cli.c

@@ -48,6 +48,7 @@ static void test_options(void) {
         "--fullscreen",
         "--max-fps", "30",
         "--max-size", "1024",
+        "--lock-video-orientation", "2",
         // "--no-control" is not compatible with "--turn-screen-off"
         // "--no-display" is not compatible with "--fulscreen"
         "--port", "1234",
@@ -78,6 +79,7 @@ static void test_options(void) {
     assert(opts->fullscreen);
     assert(opts->max_fps == 30);
     assert(opts->max_size == 1024);
+    assert(opts->lock_video_orientation == 2);
     assert(opts->port == 1234);
     assert(!strcmp(opts->push_target, "/sdcard/Movies"));
     assert(!strcmp(opts->record_filename, "file"));

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

@@ -22,10 +22,13 @@ public interface RotationListener {
 
     private final ServiceManager serviceManager = new ServiceManager();
 
+
+    private final int lockedVideoOrientation;
     private ScreenInfo screenInfo;
     private RotationListener rotationListener;
 
     public Device(Options options) {
+        lockedVideoOrientation = options.getLockedVideoOrientation();
         screenInfo = computeScreenInfo(options.getCrop(), options.getMaxSize());
         registerRotationWatcher(new IRotationWatcher.Stub() {
             @Override
@@ -48,11 +51,11 @@ public synchronized ScreenInfo getScreenInfo() {
 
     private ScreenInfo computeScreenInfo(Rect crop, int maxSize) {
         DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo();
-        boolean rotated = (displayInfo.getRotation() & 1) != 0;
+        int rotation = displayInfo.getRotation();
         Size deviceSize = displayInfo.getSize();
         Rect contentRect = new Rect(0, 0, deviceSize.getWidth(), deviceSize.getHeight());
         if (crop != null) {
-            if (rotated) {
+            if (rotation % 2 != 0) { // 180s preserve dimensions
                 // the crop (provided by the user) is expressed in the natural orientation
                 crop = flipRect(crop);
             }
@@ -64,7 +67,7 @@ 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, rotation);
     }
 
     private static String formatCrop(Rect rect) {
@@ -99,22 +102,55 @@ private static Size computeVideoSize(int w, int h, int maxSize) {
         return new Size(w, h);
     }
 
+    /**
+     * Return the rotation to apply to the device rotation to get the requested locked video orientation
+     *
+     * @param deviceRotation the device rotation
+     * @return the rotation offset
+     */
+    public int getVideoRotation(int deviceRotation) {
+        if (lockedVideoOrientation == -1) {
+            // no offset
+            return 0;
+        }
+        return (deviceRotation + 4 - lockedVideoOrientation) % 4;
+    }
+
+    /**
+     * Return the rotation to apply to the requested locked video orientation to get the device rotation
+     * @param deviceRotation the device rotation
+     * @return the (reverse) rotation offset
+     */
+    private int getReverseVideoRotation(int deviceRotation) {
+        if (lockedVideoOrientation == -1) {
+            // no offset
+            return 0;
+        }
+        return (lockedVideoOrientation + 4 - deviceRotation) % 4;
+    }
+
     public Point getPhysicalPoint(Position position) {
         // it hides the field on purpose, to read it with a lock
         @SuppressWarnings("checkstyle:HiddenField")
         ScreenInfo screenInfo = getScreenInfo(); // read with synchronization
         Size videoSize = screenInfo.getVideoSize();
-        Size clientVideoSize = position.getScreenSize();
+
+        int deviceRotation = screenInfo.getRotation();
+        int reverseVideoRotation = getReverseVideoRotation(deviceRotation);
+        // reverse the video rotation to apply the events
+        Position devicePosition = position.rotate(reverseVideoRotation);
+
+        Size clientVideoSize = devicePosition.getScreenSize();
         if (!videoSize.equals(clientVideoSize)) {
             // The client sends a click relative to a video with wrong dimensions,
             // the device may have been rotated since the event was generated, so ignore the event
             return null;
         }
         Rect contentRect = screenInfo.getContentRect();
-        Point point = position.getPoint();
-        int scaledX = contentRect.left + point.getX() * contentRect.width() / videoSize.getWidth();
-        int scaledY = contentRect.top + point.getY() * contentRect.height() / videoSize.getHeight();
-        return new Point(scaledX, scaledY);
+        Point point = devicePosition.getPoint();
+        int convertedX = contentRect.left + point.getX() * contentRect.width() / videoSize.getWidth();
+        int convertedY = contentRect.top + point.getY() * contentRect.height() / videoSize.getHeight();
+        return new Point(convertedX, convertedY);
     }
 
     public static String getDeviceName() {

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

@@ -6,6 +6,7 @@ public class Options {
     private int maxSize;
     private int bitRate;
     private int maxFps;
+    private int lockedVideoOrientation;
     private boolean tunnelForward;
     private Rect crop;
     private boolean sendFrameMeta; // send PTS so that the client may record properly
@@ -35,6 +36,14 @@ public void setMaxFps(int maxFps) {
         this.maxFps = maxFps;
     }
 
+    public int getLockedVideoOrientation() {
+        return lockedVideoOrientation;
+    }
+
+    public void setLockedVideoOrientation(int lockedVideoOrientation) {
+        this.lockedVideoOrientation = lockedVideoOrientation;
+    }
+
     public boolean isTunnelForward() {
         return tunnelForward;
     }