Screen off PoC

README.md

@@ -294,19 +294,6 @@ _¹Double-click on black borders to remove them._
 _²Right-click turns the screen on if it was off, presses BACK otherwise._
 
 
-## Custom paths
-
-To use a specific _adb_ binary, configure its path in the environment variable
-`ADB`:
-
-    ADB=/path/to/adb scrcpy
-
-To override the path of the `scrcpy-server.jar` file (it can be [useful] on
-Windows), configure its path in `SCRCPY_SERVER_PATH`.
-
-[useful]: https://github.com/Genymobile/scrcpy/issues/278#issuecomment-429330345
-
-
 ## Why _scrcpy_?
 
 A colleague challenged me to find a name as unpronounceable as [gnirehtet].

app/meson.build

@@ -143,34 +143,18 @@ else
     link_args = []
 endif
 
-executable('scrcpy', src,
-           dependencies: dependencies,
-           include_directories: src_dir,
-           install: true,
-           c_args: c_args,
-           link_args: link_args)
+executable('scrcpy', src, dependencies: dependencies, include_directories: src_dir, install: true, c_args: c_args, link_args: link_args)
 
 
 ### TESTS
 
 tests = [
-    ['test_control_event_queue', [
-        'tests/test_control_event_queue.c',
-        'src/control_event.c'
-    ]],
-    ['test_control_event_serialize', [
-        'tests/test_control_event_serialize.c',
-        'src/control_event.c'
-    ]],
-    ['test_strutil', [
-        'tests/test_strutil.c',
-        'src/str_util.c'
-    ]],
+    ['test_control_event_queue', ['tests/test_control_event_queue.c', 'src/control_event.c']],
+    ['test_control_event_serialize', ['tests/test_control_event_serialize.c', 'src/control_event.c']],
+    ['test_strutil', ['tests/test_strutil.c', 'src/str_util.c']],
 ]
 
 foreach t : tests
-    exe = executable(t[0], t[1],
-                     include_directories: src_dir,
-                     dependencies: dependencies)
+    exe = executable(t[0], t[1], include_directories: src_dir, dependencies: dependencies)
     test(t[0], exe)
 endforeach

app/src/command.c

@@ -1,6 +1,5 @@
 #include "command.h"
 
-#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -21,52 +20,15 @@ get_adb_command(void) {
     return adb_command;
 }
 
-// serialize argv to string "[arg1], [arg2], [arg3]"
-static size_t
-argv_to_string(const char *const *argv, char *buf, size_t bufsize) {
-    size_t idx = 0;
-    bool first = true;
-    while (*argv) {
-        const char *arg = *argv;
-        size_t len = strlen(arg);
-        // count space for "[], ...\0"
-        if (idx + len + 8 >= bufsize) {
-            // not enough space, truncate
-            assert(idx < bufsize - 4);
-            memcpy(&buf[idx], "...", 3);
-            idx += 3;
-            break;
-        }
-        if (first) {
-            first = false;
-        } else {
-            buf[idx++] = ',';
-            buf[idx++] = ' ';
-        }
-        buf[idx++] = '[';
-        memcpy(&buf[idx], arg, len);
-        idx += len;
-        buf[idx++] = ']';
-        argv++;
-    }
-    assert(idx < bufsize);
-    buf[idx] = '\0';
-    return idx;
-}
-
 static void
-show_adb_err_msg(enum process_result err, const char *const argv[]) {
-    char buf[512];
+show_adb_err_msg(enum process_result err) {
     switch (err) {
         case PROCESS_ERROR_GENERIC:
-            argv_to_string(argv, buf, sizeof(buf));
-            LOGE("Failed to execute: %s", buf);
+            LOGE("Failed to execute adb");
             break;
         case PROCESS_ERROR_MISSING_BINARY:
-            argv_to_string(argv, buf, sizeof(buf));
-            LOGE("Command not found: %s", buf);
-            LOGE("(make 'adb' accessible from your PATH or define its full"
-                 "path in the ADB environment variable)");
+            LOGE("'adb' command not found (make it accessible from your PATH "
+                  "or define its full path in the ADB environment variable)");
             break;
         case PROCESS_SUCCESS:
             /* do nothing */
@@ -75,7 +37,7 @@ show_adb_err_msg(enum process_result err, const char *const argv[]) {
 }
 
 process_t
-adb_execute(const char *serial, const char *const adb_cmd[], size_t len) {
+adb_execute(const char *serial, const char *const adb_cmd[], int len) {
     const char *cmd[len + 4];
     int i;
     process_t process;
@@ -92,7 +54,7 @@ adb_execute(const char *serial, const char *const adb_cmd[], size_t len) {
     cmd[len + i] = NULL;
     enum process_result r = cmd_execute(cmd[0], cmd, &process);
     if (r != PROCESS_SUCCESS) {
-        show_adb_err_msg(r, cmd);
+        show_adb_err_msg(r);
         return PROCESS_NONE;
     }
     return process;

app/src/command.h

@@ -49,7 +49,7 @@ bool
 cmd_simple_wait(process_t pid, exit_code_t *exit_code);
 
 process_t
-adb_execute(const char *serial, const char *const adb_cmd[], size_t len);
+adb_execute(const char *serial, const char *const adb_cmd[], int len);
 
 process_t
 adb_forward(const char *serial, uint16_t local_port,

app/src/compat.h

@@ -43,9 +43,4 @@
 # define SCRCPY_SDL_HAS_WINDOW_ALWAYS_ON_TOP
 #endif
 
-#if SDL_VERSION_ATLEAST(2, 0, 8)
-// <https://hg.libsdl.org/SDL/rev/dfde5d3f9781>
-# define SCRCPY_SDL_HAS_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR
-#endif
-
 #endif

app/src/convert.c

@@ -81,9 +81,9 @@ convert_keycode(SDL_Keycode from, enum android_keycode *to, uint16_t mod) {
         MAP(SDLK_ESCAPE,       AKEYCODE_ESCAPE);
         MAP(SDLK_BACKSPACE,    AKEYCODE_DEL);
         MAP(SDLK_TAB,          AKEYCODE_TAB);
+        MAP(SDLK_HOME,         AKEYCODE_HOME);
         MAP(SDLK_PAGEUP,       AKEYCODE_PAGE_UP);
         MAP(SDLK_DELETE,       AKEYCODE_FORWARD_DEL);
-        MAP(SDLK_HOME,         AKEYCODE_MOVE_HOME);
         MAP(SDLK_END,          AKEYCODE_MOVE_END);
         MAP(SDLK_PAGEDOWN,     AKEYCODE_PAGE_DOWN);
         MAP(SDLK_RIGHT,        AKEYCODE_DPAD_RIGHT);

app/src/file_handler.c

@@ -10,11 +10,11 @@
 
 struct request {
     file_handler_action_t action;
-    char *file;
+    const char *file;
 };
 
 static struct request *
-request_new(file_handler_action_t action, char *file) {
+request_new(file_handler_action_t action, const char *file) {
     struct request *req = SDL_malloc(sizeof(*req));
     if (!req) {
         return NULL;
@@ -29,8 +29,8 @@ request_free(struct request *req) {
     if (!req) {
         return;
     }
-    SDL_free(req->file);
-    SDL_free(req);
+    SDL_free((void *) req->file);
+    SDL_free((void *) req);
 }
 
 static bool
@@ -121,7 +121,7 @@ file_handler_destroy(struct file_handler *file_handler) {
     SDL_DestroyCond(file_handler->event_cond);
     SDL_DestroyMutex(file_handler->mutex);
     request_queue_destroy(&file_handler->queue);
-    SDL_free(file_handler->serial);
+    SDL_free((void *) file_handler->serial);
 }
 
 static process_t
@@ -137,7 +137,7 @@ push_file(const char *serial, const char *file) {
 bool
 file_handler_request(struct file_handler *file_handler,
                      file_handler_action_t action,
-                     char *file) {
+                     const char *file) {
     bool res;
 
     // start file_handler if it's used for the first time

app/src/file_handler.h

@@ -21,7 +21,7 @@ struct request_queue {
 };
 
 struct file_handler {
-    char *serial;
+    const char *serial;
     SDL_Thread *thread;
     SDL_mutex *mutex;
     SDL_cond *event_cond;
@@ -46,10 +46,9 @@ file_handler_stop(struct file_handler *file_handler);
 void
 file_handler_join(struct file_handler *file_handler);
 
-// take ownership of file, and will SDL_free() it
 bool
 file_handler_request(struct file_handler *file_handler,
                      file_handler_action_t action,
-                     char *file);
+                     const char *file);
 
 #endif

app/src/main.c

@@ -5,7 +5,6 @@
 #include <stdint.h>
 #include <unistd.h>
 #include <libavformat/avformat.h>
-#define SDL_MAIN_HANDLED // avoid link error on Linux Windows Subsystem
 #include <SDL2/SDL.h>
 
 #include "compat.h"
@@ -105,6 +104,7 @@ static void usage(const char *arg0) {
         "        resize window to remove black borders\n"
         "\n"
         "    Ctrl+h\n"
+        "    Home\n"
         "    Middle-click\n"
         "        click on HOME\n"
         "\n"

app/src/scrcpy.c

@@ -9,7 +9,6 @@
 
 #include "command.h"
 #include "common.h"
-#include "compat.h"
 #include "controller.h"
 #include "decoder.h"
 #include "device.h"
@@ -69,13 +68,6 @@ sdl_init_and_configure(bool display) {
     }
 #endif
 
-#ifdef SCRCPY_SDL_HAS_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR
-    // Disable compositor bypassing on X11
-    if (!SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0")) {
-        LOGW("Could not disable X11 compositor bypass");
-    }
-#endif
-
     // Do not disable the screensaver when scrcpy is running
     SDL_EnableScreenSaver();
 
@@ -290,7 +282,8 @@ scrcpy(const struct scrcpy_options *options) {
         goto finally_destroy_server;
     }
 
-    if (!server_connect_to(&server)) {
+    socket_t device_socket = server_connect_to(&server);
+    if (device_socket == INVALID_SOCKET) {
         server_stop(&server);
         ret = false;
         goto finally_destroy_server;
@@ -302,7 +295,7 @@ scrcpy(const struct scrcpy_options *options) {
     // screenrecord does not send frames when the screen content does not
     // change therefore, we transmit the screen size before the video stream,
     // to be able to init the window immediately
-    if (!device_read_info(server.video_socket, device_name, &frame_size)) {
+    if (!device_read_info(device_socket, device_name, &frame_size)) {
         server_stop(&server);
         ret = false;
         goto finally_destroy_server;
@@ -341,7 +334,7 @@ scrcpy(const struct scrcpy_options *options) {
 
     av_log_set_callback(av_log_callback);
 
-    stream_init(&stream, server.video_socket, dec, rec);
+    stream_init(&stream, device_socket, dec, rec);
 
     // now we consumed the header values, the socket receives the video stream
     // start the stream
@@ -353,7 +346,7 @@ scrcpy(const struct scrcpy_options *options) {
 
     if (display) {
         if (control) {
-            if (!controller_init(&controller, server.control_socket)) {
+            if (!controller_init(&controller, device_socket)) {
                 ret = false;
                 goto finally_stop_stream;
             }

app/src/screen.c

@@ -177,12 +177,13 @@ screen_init_rendering(struct screen *screen, const char *device_name,
     }
 
     SDL_Surface *icon = read_xpm(icon_xpm);
-    if (icon) {
-        SDL_SetWindowIcon(screen->window, icon);
-        SDL_FreeSurface(icon);
-    } else {
-        LOGW("Could not load icon");
+    if (!icon) {
+        LOGE("Could not load icon: %s", SDL_GetError());
+        screen_destroy(screen);
+        return false;
     }
+    SDL_SetWindowIcon(screen->window, icon);
+    SDL_FreeSurface(icon);
 
     LOGI("Initial texture: %" PRIu16 "x%" PRIu16, frame_size.width,
                                                   frame_size.height);

app/src/server.c

@@ -119,7 +119,7 @@ connect_and_read_byte(uint16_t port) {
     char byte;
     // the connection may succeed even if the server behind the "adb tunnel"
     // is not listening, so read one byte to detect a working connection
-    if (net_recv(socket, &byte, 1) != 1) {
+    if (net_recv_all(socket, &byte, 1) != 1) {
         // the server is not listening yet behind the adb tunnel
         return INVALID_SOCKET;
     }
@@ -210,7 +210,7 @@ server_start(struct server *server, const char *serial,
             close_socket(&server->server_socket);
         }
         disable_tunnel(server);
-        SDL_free(server->serial);
+        SDL_free((void *) server->serial);
         return false;
     }
 
@@ -219,44 +219,31 @@ server_start(struct server *server, const char *serial,
     return true;
 }
 
-bool
+socket_t
 server_connect_to(struct server *server) {
     if (!server->tunnel_forward) {
-        server->video_socket = net_accept(server->server_socket);
-        if (server->video_socket == INVALID_SOCKET) {
-            return false;
-        }
-
-        server->control_socket = net_accept(server->server_socket);
-        if (server->control_socket == INVALID_SOCKET) {
-            // the video_socket will be clean up on destroy
-            return false;
-        }
-
-        // we don't need the server socket anymore
-        close_socket(&server->server_socket);
+        server->device_socket = net_accept(server->server_socket);
     } else {
         uint32_t attempts = 100;
         uint32_t delay = 100; // ms
-        server->video_socket =
-            connect_to_server(server->local_port, attempts, delay);
-        if (server->video_socket == INVALID_SOCKET) {
-            return false;
-        }
+        server->device_socket = connect_to_server(server->local_port, attempts,
+                                                  delay);
+    }
 
-        // we know that the device is listening, we don't need several attempts
-        server->control_socket =
-            net_connect(IPV4_LOCALHOST, server->local_port);
-        if (server->control_socket == INVALID_SOCKET) {
-            return false;
-        }
+    if (server->device_socket == INVALID_SOCKET) {
+        return INVALID_SOCKET;
+    }
+
+    if (!server->tunnel_forward) {
+        // we don't need the server socket anymore
+        close_socket(&server->server_socket);
     }
 
     // we don't need the adb tunnel anymore
     disable_tunnel(server); // ignore failure
     server->tunnel_enabled = false;
 
-    return true;
+    return server->device_socket;
 }
 
 void
@@ -281,11 +268,8 @@ server_destroy(struct server *server) {
     if (server->server_socket != INVALID_SOCKET) {
         close_socket(&server->server_socket);
     }
-    if (server->video_socket != INVALID_SOCKET) {
-        close_socket(&server->video_socket);
-    }
-    if (server->control_socket != INVALID_SOCKET) {
-        close_socket(&server->control_socket);
+    if (server->device_socket != INVALID_SOCKET) {
+        close_socket(&server->device_socket);
     }
     SDL_free(server->serial);
 }

app/src/server.h

@@ -11,21 +11,19 @@ struct server {
     char *serial;
     process_t process;
     socket_t server_socket; // only used if !tunnel_forward
-    socket_t video_socket;
-    socket_t control_socket;
+    socket_t device_socket;
     uint16_t local_port;
     bool tunnel_enabled;
     bool tunnel_forward; // use "adb forward" instead of "adb reverse"
     bool send_frame_meta; // request frame PTS to be able to record properly
 };
 
-#define SERVER_INITIALIZER {          \
-    .serial = NULL,                   \
-    .process = PROCESS_NONE,          \
-    .server_socket = INVALID_SOCKET,  \
-    .video_socket = INVALID_SOCKET,   \
-    .control_socket = INVALID_SOCKET, \
-    .local_port = 0,                  \
+#define SERVER_INITIALIZER {              \
+    .serial = NULL,                       \
+    .process = PROCESS_NONE,              \
+    .server_socket = INVALID_SOCKET,      \
+    .device_socket = INVALID_SOCKET,      \
+    .local_port = 0,                      \
     .tunnel_enabled = false,          \
     .tunnel_forward = false,          \
     .send_frame_meta = false,         \
@@ -38,11 +36,11 @@ server_init(struct server *server);
 // push, enable tunnel et start the server
 bool
 server_start(struct server *server, const char *serial,
-             uint16_t local_port, uint16_t max_size, uint32_t bit_rate,
-             const char *crop, bool send_frame_meta);
+                      uint16_t local_port, uint16_t max_size, uint32_t bit_rate,
+                      const char *crop, bool send_frame_meta);
 
 // block until the communication with the server is established
-bool
+socket_t
 server_connect_to(struct server *server);
 
 // disconnect and kill the server process

app/src/tiny_xpm.c

@@ -105,10 +105,6 @@ read_xpm(char *xpm[]) {
                                                     width, height,
                                                     32, 4 * width,
                                                     rmask, gmask, bmask, amask);
-    if (!surface) {
-        LOGE("Could not create icon surface");
-        return NULL;
-    }
     // make the surface own the raw pixels
     surface->flags &= ~SDL_PREALLOC;
     return surface;

app/tests/test_control_event_queue.c

@@ -5,21 +5,21 @@
 
 static void test_control_event_queue_empty(void) {
     struct control_event_queue queue;
-    bool init_ok = control_event_queue_init(&queue);
+    SDL_bool init_ok = control_event_queue_init(&queue);
     assert(init_ok);
 
     assert(control_event_queue_is_empty(&queue));
 
     struct control_event dummy_event;
-    bool push_ok = control_event_queue_push(&queue, &dummy_event);
+    SDL_bool push_ok = control_event_queue_push(&queue, &dummy_event);
     assert(push_ok);
     assert(!control_event_queue_is_empty(&queue));
 
-    bool take_ok = control_event_queue_take(&queue, &dummy_event);
+    SDL_bool take_ok = control_event_queue_take(&queue, &dummy_event);
     assert(take_ok);
     assert(control_event_queue_is_empty(&queue));
 
-    bool take_empty_ok = control_event_queue_take(&queue, &dummy_event);
+    SDL_bool take_empty_ok = control_event_queue_take(&queue, &dummy_event);
     assert(!take_empty_ok); // the queue is empty
 
     control_event_queue_destroy(&queue);
@@ -27,7 +27,7 @@ static void test_control_event_queue_empty(void) {
 
 static void test_control_event_queue_full(void) {
     struct control_event_queue queue;
-    bool init_ok = control_event_queue_init(&queue);
+    SDL_bool init_ok = control_event_queue_init(&queue);
     assert(init_ok);
 
     assert(!control_event_queue_is_full(&queue));
@@ -36,7 +36,7 @@ static void test_control_event_queue_full(void) {
     // fill the queue
     while (control_event_queue_push(&queue, &dummy_event));
 
-    bool take_ok = control_event_queue_take(&queue, &dummy_event);
+    SDL_bool take_ok = control_event_queue_take(&queue, &dummy_event);
     assert(take_ok);
     assert(!control_event_queue_is_full(&queue));
 
@@ -45,7 +45,7 @@ static void test_control_event_queue_full(void) {
 
 static void test_control_event_queue_push_take(void) {
     struct control_event_queue queue;
-    bool init_ok = control_event_queue_init(&queue);
+    SDL_bool init_ok = control_event_queue_init(&queue);
     assert(init_ok);
 
     struct control_event event = {
@@ -57,7 +57,7 @@ static void test_control_event_queue_push_take(void) {
         },
     };
 
-    bool push1_ok = control_event_queue_push(&queue, &event);
+    SDL_bool push1_ok = control_event_queue_push(&queue, &event);
     assert(push1_ok);
 
     event = (struct control_event) {
@@ -67,11 +67,11 @@ static void test_control_event_queue_push_take(void) {
         },
     };
 
-    bool push2_ok = control_event_queue_push(&queue, &event);
+    SDL_bool push2_ok = control_event_queue_push(&queue, &event);
     assert(push2_ok);
 
     // overwrite event
-    bool take1_ok = control_event_queue_take(&queue, &event);
+    SDL_bool take1_ok = control_event_queue_take(&queue, &event);
     assert(take1_ok);
     assert(event.type == CONTROL_EVENT_TYPE_KEYCODE);
     assert(event.keycode_event.action == AKEY_EVENT_ACTION_DOWN);
@@ -79,7 +79,7 @@ static void test_control_event_queue_push_take(void) {
     assert(event.keycode_event.metastate == (AMETA_CTRL_LEFT_ON | AMETA_CTRL_ON));
 
     // overwrite event
-    bool take2_ok = control_event_queue_take(&queue, &event);
+    SDL_bool take2_ok = control_event_queue_take(&queue, &event);
     assert(take2_ok);
     assert(event.type == CONTROL_EVENT_TYPE_TEXT);
     assert(!strcmp(event.text_event.text, "abc"));

app/tests/test_control_event_serialize.c

@@ -49,14 +49,13 @@ static void test_serialize_text_event(void) {
 static void test_serialize_long_text_event(void) {
     struct control_event event;
     event.type = CONTROL_EVENT_TYPE_TEXT;
-    char text[TEXT_MAX_LENGTH + 1];
+    char text[TEXT_MAX_LENGTH];
     memset(text, 'a', sizeof(text));
-    text[TEXT_MAX_LENGTH] = '\0';
     event.text_event.text = text;
 
     unsigned char buf[SERIALIZED_EVENT_MAX_SIZE];
     int size = control_event_serialize(&event, buf);
-    assert(size == 3 + TEXT_MAX_LENGTH);
+    assert(size == 3 + sizeof(text));
 
     unsigned char expected[3 + TEXT_MAX_LENGTH];
     expected[0] = 0x01; // CONTROL_EVENT_TYPE_KEYCODE

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.0'
+        classpath 'com.android.tools.build:gradle:3.1.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Thu Apr 18 11:45:59 CEST 2019
+#Mon Jun 04 11:48:32 CEST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

release.sh

@@ -1,22 +1,13 @@
 #!/bin/bash
 set -e
 
-# test locally
-TESTDIR=build_test
-rm -rf "$TESTDIR"
-# run client tests with ASAN enabled
-meson "$TESTDIR" -Db_sanitize=address
-ninja -C"$TESTDIR" test
-
-# test server
-GRADLE=${GRADLE:-./gradlew}
-$GRADLE -p server check
-
+# build and test locally
 BUILDDIR=build_release
 rm -rf "$BUILDDIR"
 meson "$BUILDDIR" --buildtype release --strip -Db_lto=true
 cd "$BUILDDIR"
 ninja
+ninja test
 cd -
 
 # build Windows releases

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

@@ -16,20 +16,16 @@ public final class DesktopConnection implements Closeable {
 
     private static final String SOCKET_NAME = "scrcpy";
 
-    private final LocalSocket videoSocket;
-    private final FileDescriptor videoFd;
-
-    private final LocalSocket controlSocket;
-    private final InputStream controlInputStream;
-
+    private final LocalSocket socket;
+    private final InputStream inputStream;
+    private final FileDescriptor fd;
 
     private final ControlEventReader reader = new ControlEventReader();
 
-    private DesktopConnection(LocalSocket videoSocket, LocalSocket controlSocket) throws IOException {
-        this.videoSocket = videoSocket;
-        this.controlSocket = controlSocket;
-        controlInputStream = controlSocket.getInputStream();
-        videoFd = videoSocket.getFileDescriptor();
+    private DesktopConnection(LocalSocket socket) throws IOException {
+        this.socket = socket;
+        inputStream = socket.getInputStream();
+        fd = socket.getFileDescriptor();
     }
 
     private static LocalSocket connect(String abstractName) throws IOException {
@@ -48,46 +44,25 @@ public final class DesktopConnection implements Closeable {
     }
 
     public static DesktopConnection open(Device device, boolean tunnelForward) throws IOException {
-        LocalSocket videoSocket;
-        LocalSocket controlSocket;
+        LocalSocket socket;
         if (tunnelForward) {
-            LocalServerSocket localServerSocket = new LocalServerSocket(SOCKET_NAME);
-            try {
-                videoSocket = localServerSocket.accept();
-                // send one byte so the client may read() to detect a connection error
-                videoSocket.getOutputStream().write(0);
-                try {
-                    controlSocket = localServerSocket.accept();
-                } catch (IOException | RuntimeException e) {
-                    videoSocket.close();
-                    throw e;
-                }
-            } finally {
-                localServerSocket.close();
-            }
+            socket = listenAndAccept(SOCKET_NAME);
+            // send one byte so the client may read() to detect a connection error
+            socket.getOutputStream().write(0);
         } else {
-            videoSocket = connect(SOCKET_NAME);
-            try {
-                controlSocket = connect(SOCKET_NAME);
-            } catch (IOException | RuntimeException e) {
-                videoSocket.close();
-                throw e;
-            }
+            socket = connect(SOCKET_NAME);
         }
 
-        DesktopConnection connection = new DesktopConnection(videoSocket, controlSocket);
+        DesktopConnection connection = new DesktopConnection(socket);
         Size videoSize = device.getScreenInfo().getVideoSize();
         connection.send(Device.getDeviceName(), videoSize.getWidth(), videoSize.getHeight());
         return connection;
     }
 
     public void close() throws IOException {
-        videoSocket.shutdownInput();
-        videoSocket.shutdownOutput();
-        videoSocket.close();
-        controlSocket.shutdownInput();
-        controlSocket.shutdownOutput();
-        controlSocket.close();
+        socket.shutdownInput();
+        socket.shutdownOutput();
+        socket.close();
     }
 
     @SuppressWarnings("checkstyle:MagicNumber")
@@ -103,17 +78,17 @@ public final class DesktopConnection implements Closeable {
         buffer[DEVICE_NAME_FIELD_LENGTH + 1] = (byte) width;
         buffer[DEVICE_NAME_FIELD_LENGTH + 2] = (byte) (height >> 8);
         buffer[DEVICE_NAME_FIELD_LENGTH + 3] = (byte) height;
-        IO.writeFully(videoFd, buffer, 0, buffer.length);
+        IO.writeFully(fd, buffer, 0, buffer.length);
     }
 
-    public FileDescriptor getVideoFd() {
-        return videoFd;
+    public FileDescriptor getFd() {
+        return fd;
     }
 
     public ControlEvent receiveControlEvent() throws IOException {
         ControlEvent event = reader.next();
         while (event == null) {
-            reader.readFrom(controlInputStream);
+            reader.readFrom(inputStream);
             event = reader.next();
         }
         return event;

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

@@ -1,6 +1,7 @@
 package com.genymobile.scrcpy;
 
 import com.genymobile.scrcpy.wrappers.InputManager;
+import com.genymobile.scrcpy.wrappers.ServiceManager;
 
 import android.graphics.Point;
 import android.os.SystemClock;
@@ -104,16 +105,13 @@ public class EventController {
         return true;
     }
 
-    private int injectText(String text) {
-        int successCount = 0;
+    private boolean injectText(String text) {
         for (char c : text.toCharArray()) {
             if (!injectChar(c)) {
-                Ln.w("Could not inject char u+" + String.format("%04x", (int) c));
-                continue;
+                return false;
             }
-            successCount++;
         }
-        return successCount;
+        return true;
     }
 
     private boolean injectMouse(int action, int buttons, Position position) {

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

@@ -8,7 +8,7 @@ import java.io.FileDescriptor;
 import java.io.IOException;
 import java.nio.ByteBuffer;
 
-public final class IO {
+public class IO {
     private IO() {
         // not instantiable
     }

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

@@ -52,13 +52,7 @@ public final class Ln {
         if (isEnabled(Level.ERROR)) {
             Log.e(TAG, message, throwable);
             System.out.println("ERROR: " + message);
-            if (throwable != null) {
-                throwable.printStackTrace();
-            }
+            throwable.printStackTrace();
         }
     }
-
-    public static void e(String message) {
-        e(message, null);
-    }
 }

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

@@ -3,6 +3,7 @@ package com.genymobile.scrcpy;
 import com.genymobile.scrcpy.wrappers.SurfaceControl;
 
 import android.graphics.Rect;
+import android.media.MediaMuxer;
 import android.media.MediaCodec;
 import android.media.MediaCodecInfo;
 import android.media.MediaFormat;
@@ -56,6 +57,8 @@ public class ScreenEncoder implements Device.RotationListener {
     public void streamScreen(Device device, FileDescriptor fd) throws IOException {
         MediaFormat format = createFormat(bitRate, frameRate, iFrameInterval);
         device.setRotationListener(this);
+        IBinder d = SurfaceControl.getBuiltInDisplay(0);
+        SurfaceControl.setDisplayPowerMode(d, SurfaceControl.POWER_MODE_OFF);
         boolean alive;
         try {
             do {
@@ -70,9 +73,8 @@ public class ScreenEncoder implements Device.RotationListener {
                 codec.start();
                 try {
                     alive = encode(codec, fd);
-                    // do not call stop() on exception, it would trigger an IllegalStateException
-                    codec.stop();
                 } finally {
+                    codec.stop();
                     destroyDisplay(display);
                     codec.release();
                     surface.release();

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

@@ -4,6 +4,7 @@ import android.graphics.Rect;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Arrays;
 
 public final class Server {
 
@@ -24,7 +25,7 @@ public final class Server {
 
             try {
                 // synchronous
-                screenEncoder.streamScreen(device, connection.getVideoFd());
+                screenEncoder.streamScreen(device, connection.getFd());
             } catch (IOException e) {
                 // this is expected on close
                 Ln.d("Screen streaming stopped");
@@ -48,9 +49,8 @@ public final class Server {
 
     @SuppressWarnings("checkstyle:MagicNumber")
     private static Options createOptions(String... args) {
-        if (args.length != 5) {
+        if (args.length != 5)
             throw new IllegalArgumentException("Expecting 5 parameters");
-        }
 
         Options options = new Options();
 
@@ -73,7 +73,6 @@ public final class Server {
         return options;
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private static Rect parseCrop(String crop) {
         if ("-".equals(crop)) {
             return null;

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

@@ -1,8 +1,8 @@
 package com.genymobile.scrcpy.wrappers;
 
+import android.annotation.SuppressLint;
 import android.os.IInterface;
-
-import com.genymobile.scrcpy.Ln;
+import android.view.InputEvent;
 
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -10,42 +10,32 @@ import java.lang.reflect.Method;
 public class StatusBarManager {
 
     private final IInterface manager;
-    private Method expandNotificationsPanelMethod;
-    private Method collapsePanelsMethod;
+    private final Method expandNotificationsPanelMethod;
+    private final Method collapsePanelsMethod;
 
     public StatusBarManager(IInterface manager) {
         this.manager = manager;
+        try {
+            expandNotificationsPanelMethod = manager.getClass().getMethod("expandNotificationsPanel");
+            collapsePanelsMethod = manager.getClass().getMethod("collapsePanels");
+        } catch (NoSuchMethodException e) {
+            throw new AssertionError(e);
+        }
     }
 
     public void expandNotificationsPanel() {
-        if (expandNotificationsPanelMethod == null) {
-            try {
-                expandNotificationsPanelMethod = manager.getClass().getMethod("expandNotificationsPanel");
-            } catch (NoSuchMethodException e) {
-                Ln.e("ServiceBarManager.expandNotificationsPanel() is not available on this device");
-                return;
-            }
-        }
         try {
             expandNotificationsPanelMethod.invoke(manager);
         } catch (InvocationTargetException | IllegalAccessException e) {
-            Ln.e("Cannot invoke ServiceBarManager.expandNotificationsPanel()", e);
+            throw new AssertionError(e);
         }
     }
 
     public void collapsePanels() {
-        if (collapsePanelsMethod == null) {
-            try {
-                collapsePanelsMethod = manager.getClass().getMethod("collapsePanels");
-            } catch (NoSuchMethodException e) {
-                Ln.e("ServiceBarManager.collapsePanels() is not available on this device");
-                return;
-            }
-        }
         try {
             collapsePanelsMethod.invoke(manager);
         } catch (InvocationTargetException | IllegalAccessException e) {
-            Ln.e("Cannot invoke ServiceBarManager.collapsePanels()", e);
+            throw new AssertionError(e);
         }
     }
 }

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

@@ -10,6 +10,11 @@ public final class SurfaceControl {
 
     private static final Class<?> CLASS;
 
+    public static final int POWER_MODE_OFF = 0;
+    public static final int POWER_MODE_DOZE = 1;
+    public static final int POWER_MODE_NORMAL = 2;
+    public static final int POWER_MODE_DOZE_SUSPEND = 3;
+
     static {
         try {
             CLASS = Class.forName("android.view.SurfaceControl");
@@ -71,6 +76,22 @@ public final class SurfaceControl {
         }
     }
 
+    public static IBinder getBuiltInDisplay(int builtInDisplayId) {
+        try {
+            return (IBinder) CLASS.getMethod("getBuiltInDisplay", int.class).invoke(null, builtInDisplayId);
+        } catch (Exception e) {
+            throw new AssertionError(e);
+        }
+    }
+
+    public static void setDisplayPowerMode(IBinder displayToken, int mode) {
+        try {
+            CLASS.getMethod("setDisplayPowerMode", IBinder.class, int.class).invoke(null, displayToken, mode);
+        } catch (Exception e) {
+            throw new AssertionError(e);
+        }
+    }
+
     public static void destroyDisplay(IBinder displayToken) {
         try {
             CLASS.getMethod("destroyDisplay", IBinder.class).invoke(null, displayToken);