Add an option to keep the device awake

Add an option to prevent the device to sleep:

    scrcpy --stay-awake
    scrcpy -w

The initial state is restored on exit.

Fixes #631 <https://github.com/Genymobile/scrcpy/issues/631>

app/src/cli.c

@@ -137,6 +137,9 @@ scrcpy_print_usage(const char *arg0) {
         "    -v, --version\n"
         "        Print the version of scrcpy.\n"
         "\n"
+        "    -w, --stay-awake\n"
+        "        Keep the device on while scrcpy is running.\n"
+        "\n"
         "    --window-borderless\n"
         "        Disable window decorations (display borderless window).\n"
         "\n"
@@ -497,6 +500,7 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         {"rotation",               required_argument, NULL, OPT_ROTATION},
         {"serial",                 required_argument, NULL, 's'},
         {"show-touches",           no_argument,       NULL, 't'},
+        {"stay-awake",             no_argument,       NULL, 'w'},
         {"turn-screen-off",        no_argument,       NULL, 'S'},
         {"version",                no_argument,       NULL, 'v'},
         {"window-title",           required_argument, NULL, OPT_WINDOW_TITLE},
@@ -514,7 +518,7 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
     optind = 0; // reset to start from the first argument in tests
 
     int c;
-    while ((c = getopt_long(argc, argv, "b:c:fF:hm:nNp:r:s:StTv", long_options,
+    while ((c = getopt_long(argc, argv, "b:c:fF:hm:nNp:r:s:StTvw", long_options,
                             NULL)) != -1) {
         switch (c) {
             case 'b':
@@ -594,6 +598,9 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
             case 'v':
                 args->version = true;
                 break;
+            case 'w':
+                opts->stay_awake = true;
+                break;
             case OPT_RENDER_EXPIRED_FRAMES:
                 opts->render_expired_frames = true;
                 break;
@@ -676,5 +683,10 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         return false;
     }
 
+    if (!opts->control && opts->stay_awake) {
+        LOGE("Could not request to stay awake if control is disabled");
+        return false;
+    }
+
     return true;
 }

app/src/scrcpy.c

@@ -278,6 +278,7 @@ scrcpy(const struct scrcpy_options *options) {
         .control = options->control,
         .display_id = options->display_id,
         .show_touches = options->show_touches,
+        .stay_awake = options->stay_awake,
     };
     if (!server_start(&server, options->serial, &params)) {
         return false;

app/src/scrcpy.h

@@ -38,6 +38,7 @@ struct scrcpy_options {
     bool prefer_text;
     bool window_borderless;
     bool mipmaps;
+    bool stay_awake;
 };
 
 #define SCRCPY_OPTIONS_DEFAULT { \
@@ -72,6 +73,7 @@ struct scrcpy_options {
     .prefer_text = false, \
     .window_borderless = false, \
     .mipmaps = true, \
+    .stay_awake = false, \
 }
 
 bool

app/src/server.c

@@ -269,6 +269,7 @@ execute_server(struct server *server, const struct server_params *params) {
         params->control ? "true" : "false",
         display_id_string,
         params->show_touches ? "true" : "false",
+        params->stay_awake ? "true" : "false",
     };
 #ifdef SERVER_DEBUGGER
     LOGI("Server debugger waiting for a client on device port "

app/src/server.h

@@ -52,6 +52,7 @@ struct server_params {
     bool control;
     uint16_t display_id;
     bool show_touches;
+    bool stay_awake;
 };
 
 // init default values