Handle repeating keycodes

Initialize "repeat" count on key events.

PR #1519 <https://github.com/Genymobile/scrcpy/pull/1519>
Refs #1013 <https://github.com/Genymobile/scrcpy/pull/1013>

Signed-off-by: Romain Vimont <rom@rom1v.com>

README.md

@@ -479,6 +479,17 @@ scrcpy -t
 Note that it only shows _physical_ touches (with the finger on the device).
 
 
+#### Disable screensaver
+
+By default, scrcpy does not prevent the screensaver to run on the computer.
+
+To disable it:
+
+```bash
+scrcpy --disable-screensaver
+```
+
+
 ### Input control
 
 #### Rotate device screen

app/meson.build

@@ -164,12 +164,12 @@ if get_option('buildtype') == 'debug'
             'src/cli.c',
             'src/util/str_util.c',
         ]],
-        ['test_control_event_serialize', [
+        ['test_control_msg_serialize', [
             'tests/test_control_msg_serialize.c',
             'src/control_msg.c',
             'src/util/str_util.c',
         ]],
-        ['test_device_event_deserialize', [
+        ['test_device_msg_deserialize', [
             'tests/test_device_msg_deserialize.c',
             'src/device_msg.c',
         ]],

app/scrcpy.1

@@ -43,6 +43,10 @@ The values are expressed in the device natural orientation (typically, portrait
 .B \-\-max\-size
 value is computed on the cropped size.
 
+.TP
+.BI "\-\-disable-screensaver"
+Disable screensaver while scrcpy is running.
+
 .TP
 .BI "\-\-display " id
 Specify the display id to mirror.

app/src/cli.c

@@ -45,6 +45,9 @@ scrcpy_print_usage(const char *arg0) {
         "        (typically, portrait for a phone, landscape for a tablet).\n"
         "        Any --max-size value is computed on the cropped size.\n"
         "\n"
+        "    --disable-screensaver\n"
+        "        Disable screensaver while scrcpy is running.\n"
+        "\n"
         "    --display id\n"
         "        Specify the display id to mirror.\n"
         "\n"
@@ -526,6 +529,7 @@ guess_record_format(const char *filename) {
 #define OPT_NO_MIPMAPS             1017
 #define OPT_CODEC_OPTIONS          1018
 #define OPT_FORCE_ADB_FORWARD      1019
+#define OPT_DISABLE_SCREENSAVER    1020
 
 bool
 scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
@@ -534,6 +538,8 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         {"bit-rate",               required_argument, NULL, 'b'},
         {"codec-options",          required_argument, NULL, OPT_CODEC_OPTIONS},
         {"crop",                   required_argument, NULL, OPT_CROP},
+        {"disable-screensaver",    no_argument,       NULL,
+                                                  OPT_DISABLE_SCREENSAVER},
         {"display",                required_argument, NULL, OPT_DISPLAY_ID},
         {"force-adb-forward",      no_argument,       NULL,
                                                   OPT_FORCE_ADB_FORWARD},
@@ -716,6 +722,9 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
             case OPT_FORCE_ADB_FORWARD:
                 opts->force_adb_forward = true;
                 break;
+            case OPT_DISABLE_SCREENSAVER:
+                opts->disable_screensaver = true;
+                break;
             default:
                 // getopt prints the error message on stderr
                 return false;

app/src/control_msg.c

@@ -20,9 +20,9 @@ write_position(uint8_t *buf, const struct position *position) {
 static size_t
 write_string(const char *utf8, size_t max_len, unsigned char *buf) {
     size_t len = utf8_truncation_index(utf8, max_len);
-    buffer_write16be(buf, (uint16_t) len);
-    memcpy(&buf[2], utf8, len);
-    return 2 + len;
+    buffer_write32be(buf, len);
+    memcpy(&buf[4], utf8, len);
+    return 4 + len;
 }
 
 static uint16_t
@@ -42,8 +42,9 @@ control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
         case CONTROL_MSG_TYPE_INJECT_KEYCODE:
             buf[1] = msg->inject_keycode.action;
             buffer_write32be(&buf[2], msg->inject_keycode.keycode);
-            buffer_write32be(&buf[6], msg->inject_keycode.metastate);
-            return 10;
+            buffer_write32be(&buf[6], msg->inject_keycode.repeat);
+            buffer_write32be(&buf[10], msg->inject_keycode.metastate);
+            return 14;
         case CONTROL_MSG_TYPE_INJECT_TEXT: {
             size_t len =
                 write_string(msg->inject_text.text,

app/src/control_msg.h

@@ -10,10 +10,11 @@
 #include "android/keycodes.h"
 #include "common.h"
 
+#define CONTROL_MSG_MAX_SIZE (1 << 18) // 256k
+
 #define CONTROL_MSG_INJECT_TEXT_MAX_LENGTH 300
-#define CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH 4092
-#define CONTROL_MSG_SERIALIZED_MAX_SIZE \
-    (4 + CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH)
+// type: 1 byte; paste flag: 1 byte; length: 4 bytes
+#define CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH (CONTROL_MSG_MAX_SIZE - 6)
 
 #define POINTER_ID_MOUSE UINT64_C(-1);
 
@@ -43,6 +44,7 @@ struct control_msg {
         struct {
             enum android_keyevent_action action;
             enum android_keycode keycode;
+            uint32_t repeat;
             enum android_metastate metastate;
         } inject_keycode;
         struct {
@@ -70,7 +72,7 @@ struct control_msg {
     };
 };
 
-// buf size must be at least CONTROL_MSG_SERIALIZED_MAX_SIZE
+// buf size must be at least CONTROL_MSG_MAX_SIZE
 // return the number of bytes written
 size_t
 control_msg_serialize(const struct control_msg *msg, unsigned char *buf);

app/src/controller.c

@@ -60,7 +60,7 @@ controller_push_msg(struct controller *controller,
 static bool
 process_msg(struct controller *controller,
               const struct control_msg *msg) {
-    unsigned char serialized_msg[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    static unsigned char serialized_msg[CONTROL_MSG_MAX_SIZE];
     int length = control_msg_serialize(msg, serialized_msg);
     if (!length) {
         return false;

app/src/device_msg.c

@@ -9,7 +9,7 @@
 ssize_t
 device_msg_deserialize(const unsigned char *buf, size_t len,
                        struct device_msg *msg) {
-    if (len < 3) {
+    if (len < 5) {
         // at least type + empty string length
         return 0; // not available
     }
@@ -17,8 +17,8 @@ device_msg_deserialize(const unsigned char *buf, size_t len,
     msg->type = buf[0];
     switch (msg->type) {
         case DEVICE_MSG_TYPE_CLIPBOARD: {
-            uint16_t clipboard_len = buffer_read16be(&buf[1]);
-            if (clipboard_len > len - 3) {
+            size_t clipboard_len = buffer_read32be(&buf[1]);
+            if (clipboard_len > len - 5) {
                 return 0; // not available
             }
             char *text = SDL_malloc(clipboard_len + 1);
@@ -27,12 +27,12 @@ device_msg_deserialize(const unsigned char *buf, size_t len,
                 return -1;
             }
             if (clipboard_len) {
-                memcpy(text, &buf[3], clipboard_len);
+                memcpy(text, &buf[5], clipboard_len);
             }
             text[clipboard_len] = '\0';
 
             msg->clipboard.text = text;
-            return 3 + clipboard_len;
+            return 5 + clipboard_len;
         }
         default:
             LOGW("Unknown device message type: %d", (int) msg->type);

app/src/device_msg.h

@@ -7,8 +7,9 @@
 
 #include "config.h"
 
-#define DEVICE_MSG_TEXT_MAX_LENGTH 4093
-#define DEVICE_MSG_SERIALIZED_MAX_SIZE (3 + DEVICE_MSG_TEXT_MAX_LENGTH)
+#define DEVICE_MSG_MAX_SIZE (1 << 18) // 256k
+// type: 1 byte; length: 4 bytes
+#define DEVICE_MSG_TEXT_MAX_LENGTH (DEVICE_MSG_MAX_SIZE - 5)
 
 enum device_msg_type {
     DEVICE_MSG_TYPE_CLIPBOARD,

app/src/input_manager.c

@@ -234,7 +234,7 @@ input_manager_process_text_input(struct input_manager *im,
 
 static bool
 convert_input_key(const SDL_KeyboardEvent *from, struct control_msg *to,
-                  bool prefer_text) {
+                  bool prefer_text, uint32_t repeat) {
     to->type = CONTROL_MSG_TYPE_INJECT_KEYCODE;
 
     if (!convert_keycode_action(from->type, &to->inject_keycode.action)) {
@@ -247,6 +247,7 @@ convert_input_key(const SDL_KeyboardEvent *from, struct control_msg *to,
         return false;
     }
 
+    to->inject_keycode.repeat = repeat;
     to->inject_keycode.metastate = convert_meta_state(mod);
 
     return true;
@@ -411,8 +412,14 @@ input_manager_process_key(struct input_manager *im,
         return;
     }
 
+    if (event->repeat) {
+        ++im->repeat;
+    } else {
+        im->repeat = 0;
+    }
+
     struct control_msg msg;
-    if (convert_input_key(event, &msg, im->prefer_text)) {
+    if (convert_input_key(event, &msg, im->prefer_text, im->repeat)) {
         if (!controller_push_msg(controller, &msg)) {
             LOGW("Could not request 'inject keycode'");
         }

app/src/input_manager.h

@@ -14,6 +14,11 @@ struct input_manager {
     struct controller *controller;
     struct video_buffer *video_buffer;
     struct screen *screen;
+
+    // SDL reports repeated events as a boolean, but Android expects the actual
+    // number of repetitions. This variable keeps track of the count.
+    unsigned repeat;
+
     bool prefer_text;
 };
 

app/src/receiver.c

@@ -60,28 +60,29 @@ static int
 run_receiver(void *data) {
     struct receiver *receiver = data;
 
-    unsigned char buf[DEVICE_MSG_SERIALIZED_MAX_SIZE];
+    static unsigned char buf[DEVICE_MSG_MAX_SIZE];
     size_t head = 0;
 
     for (;;) {
-        assert(head < DEVICE_MSG_SERIALIZED_MAX_SIZE);
-        ssize_t r = net_recv(receiver->control_socket, buf,
-                             DEVICE_MSG_SERIALIZED_MAX_SIZE - head);
+        assert(head < DEVICE_MSG_MAX_SIZE);
+        ssize_t r = net_recv(receiver->control_socket, buf + head,
+                             DEVICE_MSG_MAX_SIZE - head);
         if (r <= 0) {
             LOGD("Receiver stopped");
             break;
         }
 
-        ssize_t consumed = process_msgs(buf, r);
+        head += r;
+        ssize_t consumed = process_msgs(buf, head);
         if (consumed == -1) {
             // an error occurred
             break;
         }
 
         if (consumed) {
+            head -= consumed;
             // shift the remaining data in the buffer
-            memmove(buf, &buf[consumed], r - consumed);
-            head = r - consumed;
+            memmove(buf, &buf[consumed], head);
         }
     }
 

app/src/scrcpy.c

@@ -46,6 +46,7 @@ static struct input_manager input_manager = {
     .controller = &controller,
     .video_buffer = &video_buffer,
     .screen = &screen,
+    .repeat = 0,
     .prefer_text = false, // initialized later
 };
 
@@ -63,7 +64,8 @@ BOOL WINAPI windows_ctrl_handler(DWORD ctrl_type) {
 
 // init SDL and set appropriate hints
 static bool
-sdl_init_and_configure(bool display, const char *render_driver) {
+sdl_init_and_configure(bool display, const char *render_driver,
+                       bool disable_screensaver) {
     uint32_t flags = display ? SDL_INIT_VIDEO : SDL_INIT_EVENTS;
     if (SDL_Init(flags)) {
         LOGC("Could not initialize SDL: %s", SDL_GetError());
@@ -112,8 +114,13 @@ sdl_init_and_configure(bool display, const char *render_driver) {
         LOGW("Could not disable minimize on focus loss");
     }
 
-    // Do not disable the screensaver when scrcpy is running
-    SDL_EnableScreenSaver();
+    if (disable_screensaver) {
+        LOGD("Screensaver disabled");
+        SDL_DisableScreenSaver();
+    } else {
+        LOGD("Screensaver enabled");
+        SDL_EnableScreenSaver();
+    }
 
     return true;
 }
@@ -321,7 +328,8 @@ scrcpy(const struct scrcpy_options *options) {
     bool controller_initialized = false;
     bool controller_started = false;
 
-    if (!sdl_init_and_configure(options->display, options->render_driver)) {
+    if (!sdl_init_and_configure(options->display, options->render_driver,
+                                options->disable_screensaver)) {
         goto end;
     }
 

app/src/scrcpy.h

@@ -43,6 +43,7 @@ struct scrcpy_options {
     bool mipmaps;
     bool stay_awake;
     bool force_adb_forward;
+    bool disable_screensaver;
 };
 
 #define SCRCPY_OPTIONS_DEFAULT { \
@@ -81,6 +82,7 @@ struct scrcpy_options {
     .mipmaps = true, \
     .stay_awake = false, \
     .force_adb_forward = false, \
+    .disable_screensaver = false, \
 }
 
 bool

app/tests/test_control_msg_serialize.c

@@ -9,18 +9,20 @@ static void test_serialize_inject_keycode(void) {
         .inject_keycode = {
             .action = AKEY_EVENT_ACTION_UP,
             .keycode = AKEYCODE_ENTER,
+            .repeat = 5,
             .metastate = AMETA_SHIFT_ON | AMETA_SHIFT_LEFT_ON,
         },
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
-    assert(size == 10);
+    assert(size == 14);
 
     const unsigned char expected[] = {
         CONTROL_MSG_TYPE_INJECT_KEYCODE,
         0x01, // AKEY_EVENT_ACTION_UP
         0x00, 0x00, 0x00, 0x42, // AKEYCODE_ENTER
+        0x00, 0x00, 0x00, 0X05, // repeat
         0x00, 0x00, 0x00, 0x41, // AMETA_SHIFT_ON | AMETA_SHIFT_LEFT_ON
     };
     assert(!memcmp(buf, expected, sizeof(expected)));
@@ -34,13 +36,13 @@ static void test_serialize_inject_text(void) {
         },
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
-    assert(size == 16);
+    assert(size == 18);
 
     const unsigned char expected[] = {
         CONTROL_MSG_TYPE_INJECT_TEXT,
-        0x00, 0x0d, // text length
+        0x00, 0x00, 0x00, 0x0d, // text length
         'h', 'e', 'l', 'l', 'o', ',', ' ', 'w', 'o', 'r', 'l', 'd', '!', // text
     };
     assert(!memcmp(buf, expected, sizeof(expected)));
@@ -54,15 +56,17 @@ static void test_serialize_inject_text_long(void) {
     text[CONTROL_MSG_INJECT_TEXT_MAX_LENGTH] = '\0';
     msg.inject_text.text = text;
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
-    assert(size == 3 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
+    assert(size == 5 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
 
-    unsigned char expected[3 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH];
+    unsigned char expected[5 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH];
     expected[0] = CONTROL_MSG_TYPE_INJECT_TEXT;
-    expected[1] = 0x01;
-    expected[2] = 0x2c; // text length (16 bits)
-    memset(&expected[3], 'a', CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
+    expected[1] = 0x00;
+    expected[2] = 0x00;
+    expected[3] = 0x01;
+    expected[4] = 0x2c; // text length (32 bits)
+    memset(&expected[5], 'a', CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
 
     assert(!memcmp(buf, expected, sizeof(expected)));
 }
@@ -88,7 +92,7 @@ static void test_serialize_inject_touch_event(void) {
         },
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
     assert(size == 28);
 
@@ -123,7 +127,7 @@ static void test_serialize_inject_scroll_event(void) {
         },
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
     assert(size == 21);
 
@@ -142,7 +146,7 @@ static void test_serialize_back_or_screen_on(void) {
         .type = CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON,
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
     assert(size == 1);
 
@@ -157,7 +161,7 @@ static void test_serialize_expand_notification_panel(void) {
         .type = CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL,
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
     assert(size == 1);
 
@@ -172,7 +176,7 @@ static void test_serialize_collapse_notification_panel(void) {
         .type = CONTROL_MSG_TYPE_COLLAPSE_NOTIFICATION_PANEL,
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
     assert(size == 1);
 
@@ -187,7 +191,7 @@ static void test_serialize_get_clipboard(void) {
         .type = CONTROL_MSG_TYPE_GET_CLIPBOARD,
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
     assert(size == 1);
 
@@ -206,14 +210,14 @@ static void test_serialize_set_clipboard(void) {
         },
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
-    assert(size == 17);
+    assert(size == 19);
 
     const unsigned char expected[] = {
         CONTROL_MSG_TYPE_SET_CLIPBOARD,
         1, // paste
-        0x00, 0x0d, // text length
+        0x00, 0x00, 0x00, 0x0d, // text length
         'h', 'e', 'l', 'l', 'o', ',', ' ', 'w', 'o', 'r', 'l', 'd', '!', // text
     };
     assert(!memcmp(buf, expected, sizeof(expected)));
@@ -227,7 +231,7 @@ static void test_serialize_set_screen_power_mode(void) {
         },
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
     assert(size == 2);
 
@@ -243,7 +247,7 @@ static void test_serialize_rotate_device(void) {
         .type = CONTROL_MSG_TYPE_ROTATE_DEVICE,
     };
 
-    unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
     assert(size == 1);
 

app/tests/test_device_msg_deserialize.c

@@ -4,16 +4,17 @@
 #include "device_msg.h"
 
 #include <stdio.h>
+
 static void test_deserialize_clipboard(void) {
     const unsigned char input[] = {
         DEVICE_MSG_TYPE_CLIPBOARD,
-        0x00, 0x03, // text length
+        0x00, 0x00, 0x00, 0x03, // text length
         0x41, 0x42, 0x43, // "ABC"
     };
 
     struct device_msg msg;
     ssize_t r = device_msg_deserialize(input, sizeof(input), &msg);
-    assert(r == 6);
+    assert(r == 8);
 
     assert(msg.type == DEVICE_MSG_TYPE_CLIPBOARD);
     assert(msg.clipboard.text);
@@ -22,7 +23,30 @@ static void test_deserialize_clipboard(void) {
     device_msg_destroy(&msg);
 }
 
+static void test_deserialize_clipboard_big(void) {
+    unsigned char input[DEVICE_MSG_MAX_SIZE];
+    input[0] = DEVICE_MSG_TYPE_CLIPBOARD;
+    input[1] = (DEVICE_MSG_TEXT_MAX_LENGTH & 0xff000000u) >> 24;
+    input[2] = (DEVICE_MSG_TEXT_MAX_LENGTH & 0x00ff0000u) >> 16;
+    input[3] = (DEVICE_MSG_TEXT_MAX_LENGTH & 0x0000ff00u) >> 8;
+    input[4] =  DEVICE_MSG_TEXT_MAX_LENGTH & 0x000000ffu;
+
+    memset(input + 5, 'a', DEVICE_MSG_TEXT_MAX_LENGTH);
+
+    struct device_msg msg;
+    ssize_t r = device_msg_deserialize(input, sizeof(input), &msg);
+    assert(r == DEVICE_MSG_MAX_SIZE);
+
+    assert(msg.type == DEVICE_MSG_TYPE_CLIPBOARD);
+    assert(msg.clipboard.text);
+    assert(strlen(msg.clipboard.text) == DEVICE_MSG_TEXT_MAX_LENGTH);
+    assert(msg.clipboard.text[0] == 'a');
+
+    device_msg_destroy(&msg);
+}
+
 int main(void) {
     test_deserialize_clipboard();
+    test_deserialize_clipboard_big();
     return 0;
 }

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

@@ -31,15 +31,17 @@ public final class ControlMessage {
     private int hScroll;
     private int vScroll;
     private int flags;
+    private int repeat;
 
     private ControlMessage() {
     }
 
-    public static ControlMessage createInjectKeycode(int action, int keycode, int metaState) {
+    public static ControlMessage createInjectKeycode(int action, int keycode, int repeat, int metaState) {
         ControlMessage msg = new ControlMessage();
         msg.type = TYPE_INJECT_KEYCODE;
         msg.action = action;
         msg.keycode = keycode;
+        msg.repeat = repeat;
         msg.metaState = metaState;
         return msg;
     }
@@ -144,4 +146,8 @@ public final class ControlMessage {
     public int getFlags() {
         return flags;
     }
+
+    public int getRepeat() {
+        return repeat;
+    }
 }

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

@@ -8,20 +8,19 @@ import java.nio.charset.StandardCharsets;
 
 public class ControlMessageReader {
 
-    static final int INJECT_KEYCODE_PAYLOAD_LENGTH = 9;
+    static final int INJECT_KEYCODE_PAYLOAD_LENGTH = 13;
     static final int INJECT_TOUCH_EVENT_PAYLOAD_LENGTH = 27;
     static final int INJECT_SCROLL_EVENT_PAYLOAD_LENGTH = 20;
     static final int SET_SCREEN_POWER_MODE_PAYLOAD_LENGTH = 1;
     static final int SET_CLIPBOARD_FIXED_PAYLOAD_LENGTH = 1;
 
-    public static final int CLIPBOARD_TEXT_MAX_LENGTH = 4092; // 4096 - 1 (type) - 1 (parse flag) - 2 (length)
+    private static final int MESSAGE_MAX_SIZE = 1 << 18; // 256k
+
+    public static final int CLIPBOARD_TEXT_MAX_LENGTH = MESSAGE_MAX_SIZE - 6; // type: 1 byte; paste flag: 1 byte; length: 4 bytes
     public static final int INJECT_TEXT_MAX_LENGTH = 300;
 
-    private static final int RAW_BUFFER_SIZE = 4096;
-
-    private final byte[] rawBuffer = new byte[RAW_BUFFER_SIZE];
+    private final byte[] rawBuffer = new byte[MESSAGE_MAX_SIZE];
     private final ByteBuffer buffer = ByteBuffer.wrap(rawBuffer);
-    private final byte[] textBuffer = new byte[CLIPBOARD_TEXT_MAX_LENGTH];
 
     public ControlMessageReader() {
         // invariant: the buffer is always in "get" mode
@@ -99,20 +98,23 @@ public class ControlMessageReader {
         }
         int action = toUnsigned(buffer.get());
         int keycode = buffer.getInt();
+        int repeat = buffer.getInt();
         int metaState = buffer.getInt();
-        return ControlMessage.createInjectKeycode(action, keycode, metaState);
+        return ControlMessage.createInjectKeycode(action, keycode, repeat, metaState);
     }
 
     private String parseString() {
-        if (buffer.remaining() < 2) {
+        if (buffer.remaining() < 4) {
             return null;
         }
-        int len = toUnsigned(buffer.getShort());
+        int len = buffer.getInt();
         if (buffer.remaining() < len) {
             return null;
         }
-        buffer.get(textBuffer, 0, len);
-        return new String(textBuffer, 0, len, StandardCharsets.UTF_8);
+        int position = buffer.position();
+        // Move the buffer position to consume the text
+        buffer.position(position + len);
+        return new String(rawBuffer, position, len, StandardCharsets.UTF_8);
     }
 
     private ControlMessage parseInjectText() {

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

@@ -74,7 +74,7 @@ public class Controller {
         switch (msg.getType()) {
             case ControlMessage.TYPE_INJECT_KEYCODE:
                 if (device.supportsInputEvents()) {
-                    injectKeycode(msg.getAction(), msg.getKeycode(), msg.getMetaState());
+                    injectKeycode(msg.getAction(), msg.getKeycode(), msg.getRepeat(), msg.getMetaState());
                 }
                 break;
             case ControlMessage.TYPE_INJECT_TEXT:
@@ -130,8 +130,8 @@ public class Controller {
         }
     }
 
-    private boolean injectKeycode(int action, int keycode, int metaState) {
-        return device.injectKeyEvent(action, keycode, 0, metaState);
+    private boolean injectKeycode(int action, int keycode, int repeat, int metaState) {
+        return device.injectKeyEvent(action, keycode, repeat, metaState);
     }
 
     private boolean injectChar(char c) {

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

@@ -7,10 +7,10 @@ import java.nio.charset.StandardCharsets;
 
 public class DeviceMessageWriter {
 
-    public static final int CLIPBOARD_TEXT_MAX_LENGTH = 4093;
-    private static final int MAX_EVENT_SIZE = CLIPBOARD_TEXT_MAX_LENGTH + 3;
+    private static final int MESSAGE_MAX_SIZE = 1 << 18; // 256k
+    public static final int CLIPBOARD_TEXT_MAX_LENGTH = MESSAGE_MAX_SIZE - 5; // type: 1 byte; length: 4 bytes
 
-    private final byte[] rawBuffer = new byte[MAX_EVENT_SIZE];
+    private final byte[] rawBuffer = new byte[MESSAGE_MAX_SIZE];
     private final ByteBuffer buffer = ByteBuffer.wrap(rawBuffer);
 
     public void writeTo(DeviceMessage msg, OutputStream output) throws IOException {
@@ -21,7 +21,7 @@ public class DeviceMessageWriter {
                 String text = msg.getText();
                 byte[] raw = text.getBytes(StandardCharsets.UTF_8);
                 int len = StringUtils.getUtf8TruncationIndex(raw, CLIPBOARD_TEXT_MAX_LENGTH);
-                buffer.putShort((short) len);
+                buffer.putInt(len);
                 buffer.put(raw, 0, len);
                 output.write(rawBuffer, 0, buffer.position());
                 break;

server/src/test/java/com/genymobile/scrcpy/ControlMessageReaderTest.java

@@ -25,6 +25,7 @@ public class ControlMessageReaderTest {
         dos.writeByte(ControlMessage.TYPE_INJECT_KEYCODE);
         dos.writeByte(KeyEvent.ACTION_UP);
         dos.writeInt(KeyEvent.KEYCODE_ENTER);
+        dos.writeInt(5); // repeat
         dos.writeInt(KeyEvent.META_CTRL_ON);
         byte[] packet = bos.toByteArray();
 
@@ -37,6 +38,7 @@ public class ControlMessageReaderTest {
         Assert.assertEquals(ControlMessage.TYPE_INJECT_KEYCODE, event.getType());
         Assert.assertEquals(KeyEvent.ACTION_UP, event.getAction());
         Assert.assertEquals(KeyEvent.KEYCODE_ENTER, event.getKeycode());
+        Assert.assertEquals(5, event.getRepeat());
         Assert.assertEquals(KeyEvent.META_CTRL_ON, event.getMetaState());
     }
 
@@ -48,7 +50,7 @@ public class ControlMessageReaderTest {
         DataOutputStream dos = new DataOutputStream(bos);
         dos.writeByte(ControlMessage.TYPE_INJECT_TEXT);
         byte[] text = "testé".getBytes(StandardCharsets.UTF_8);
-        dos.writeShort(text.length);
+        dos.writeInt(text.length);
         dos.write(text);
         byte[] packet = bos.toByteArray();
 
@@ -68,7 +70,7 @@ public class ControlMessageReaderTest {
         dos.writeByte(ControlMessage.TYPE_INJECT_TEXT);
         byte[] text = new byte[ControlMessageReader.INJECT_TEXT_MAX_LENGTH];
         Arrays.fill(text, (byte) 'a');
-        dos.writeShort(text.length);
+        dos.writeInt(text.length);
         dos.write(text);
         byte[] packet = bos.toByteArray();
 
@@ -218,7 +220,7 @@ public class ControlMessageReaderTest {
         dos.writeByte(ControlMessage.TYPE_SET_CLIPBOARD);
         dos.writeByte(1); // paste
         byte[] text = "testé".getBytes(StandardCharsets.UTF_8);
-        dos.writeShort(text.length);
+        dos.writeInt(text.length);
         dos.write(text);
 
         byte[] packet = bos.toByteArray();
@@ -246,7 +248,7 @@ public class ControlMessageReaderTest {
         Arrays.fill(rawText, (byte) 'a');
         String text = new String(rawText, 0, rawText.length);
 
-        dos.writeShort(rawText.length);
+        dos.writeInt(rawText.length);
         dos.write(rawText);
 
         byte[] packet = bos.toByteArray();
@@ -308,11 +310,13 @@ public class ControlMessageReaderTest {
         dos.writeByte(ControlMessage.TYPE_INJECT_KEYCODE);
         dos.writeByte(KeyEvent.ACTION_UP);
         dos.writeInt(KeyEvent.KEYCODE_ENTER);
+        dos.writeInt(0); // repeat
         dos.writeInt(KeyEvent.META_CTRL_ON);
 
         dos.writeByte(ControlMessage.TYPE_INJECT_KEYCODE);
         dos.writeByte(MotionEvent.ACTION_DOWN);
         dos.writeInt(MotionEvent.BUTTON_PRIMARY);
+        dos.writeInt(1); // repeat
         dos.writeInt(KeyEvent.META_CTRL_ON);
 
         byte[] packet = bos.toByteArray();
@@ -322,12 +326,14 @@ public class ControlMessageReaderTest {
         Assert.assertEquals(ControlMessage.TYPE_INJECT_KEYCODE, event.getType());
         Assert.assertEquals(KeyEvent.ACTION_UP, event.getAction());
         Assert.assertEquals(KeyEvent.KEYCODE_ENTER, event.getKeycode());
+        Assert.assertEquals(0, event.getRepeat());
         Assert.assertEquals(KeyEvent.META_CTRL_ON, event.getMetaState());
 
         event = reader.next();
         Assert.assertEquals(ControlMessage.TYPE_INJECT_KEYCODE, event.getType());
         Assert.assertEquals(MotionEvent.ACTION_DOWN, event.getAction());
         Assert.assertEquals(MotionEvent.BUTTON_PRIMARY, event.getKeycode());
+        Assert.assertEquals(1, event.getRepeat());
         Assert.assertEquals(KeyEvent.META_CTRL_ON, event.getMetaState());
     }
 
@@ -341,6 +347,7 @@ public class ControlMessageReaderTest {
         dos.writeByte(ControlMessage.TYPE_INJECT_KEYCODE);
         dos.writeByte(KeyEvent.ACTION_UP);
         dos.writeInt(KeyEvent.KEYCODE_ENTER);
+        dos.writeInt(4); // repeat
         dos.writeInt(KeyEvent.META_CTRL_ON);
 
         dos.writeByte(ControlMessage.TYPE_INJECT_KEYCODE);
@@ -353,6 +360,7 @@ public class ControlMessageReaderTest {
         Assert.assertEquals(ControlMessage.TYPE_INJECT_KEYCODE, event.getType());
         Assert.assertEquals(KeyEvent.ACTION_UP, event.getAction());
         Assert.assertEquals(KeyEvent.KEYCODE_ENTER, event.getKeycode());
+        Assert.assertEquals(4, event.getRepeat());
         Assert.assertEquals(KeyEvent.META_CTRL_ON, event.getMetaState());
 
         event = reader.next();
@@ -360,6 +368,7 @@ public class ControlMessageReaderTest {
 
         bos.reset();
         dos.writeInt(MotionEvent.BUTTON_PRIMARY);
+        dos.writeInt(5); // repeat
         dos.writeInt(KeyEvent.META_CTRL_ON);
         packet = bos.toByteArray();
         reader.readFrom(new ByteArrayInputStream(packet));
@@ -369,6 +378,7 @@ public class ControlMessageReaderTest {
         Assert.assertEquals(ControlMessage.TYPE_INJECT_KEYCODE, event.getType());
         Assert.assertEquals(MotionEvent.ACTION_DOWN, event.getAction());
         Assert.assertEquals(MotionEvent.BUTTON_PRIMARY, event.getKeycode());
+        Assert.assertEquals(5, event.getRepeat());
         Assert.assertEquals(KeyEvent.META_CTRL_ON, event.getMetaState());
     }
 }

server/src/test/java/com/genymobile/scrcpy/DeviceMessageWriterTest.java

@@ -19,7 +19,7 @@ public class DeviceMessageWriterTest {
         ByteArrayOutputStream bos = new ByteArrayOutputStream();
         DataOutputStream dos = new DataOutputStream(bos);
         dos.writeByte(DeviceMessage.TYPE_CLIPBOARD);
-        dos.writeShort(data.length);
+        dos.writeInt(data.length);
         dos.write(data);
 
         byte[] expected = bos.toByteArray();