Always prefer text events by default

This improves text input, but it breaks the expected behavior in games
again: <https://github.com/Genymobile/scrcpy/issues/87>.

To get the previous behavior back, pass an explicit option:

    scrcpy --prefer-text-events=non-alpha

README.md

@@ -143,6 +143,7 @@ This is useful for example to mirror only one eye of the Oculus Go:
 
 ```bash
 scrcpy --crop 1224:1440:0:0   # 1224x1440 at offset (0,0)
+scrcpy -c 1224:1440:0:0       # short version
 ```
 
 If `--max-size` is also specified, resizing is applied after cropping.
@@ -225,6 +226,7 @@ The window of app can always be above others by:
 
 ```bash
 scrcpy --always-on-top
+scrcpy -T  # short version
 ```
 
 

app/scrcpy.1

@@ -62,11 +62,14 @@ Set the TCP port the client listens on.
 Default is 27183.
 
 .TP
-.B \-\-prefer\-text
+.BI \-\-prefer\-text\-events " mode
-Inject alpha characters and space as text events instead of key events.
+Configure how key/text events are forwarded to the Android device.
 
-This avoids issues when combining multiple keys to enter special characters,
+Possible \fImode\fRs are "always" (every text is sent as text), "non-alpha"
-but breaks the expected behavior of alpha keys in games (typically WASD).
+(only letters are sent as a sequence of key events, other characters are sent
+as text) and "never" (every text is sent as a sequence of key events).
+
+Default is "always".
 
 .TP
 .BI "\-\-push\-target " path

app/src/event_converter.c

@@ -76,7 +76,7 @@ convert_meta_state(SDL_Keymod mod) {
 
 bool
 convert_keycode(SDL_Keycode from, enum android_keycode *to, uint16_t mod,
-                bool prefer_text) {
+                enum text_events_pref pref) {
     switch (from) {
         MAP(SDLK_RETURN,       AKEYCODE_ENTER);
         MAP(SDLK_KP_ENTER,     AKEYCODE_NUMPAD_ENTER);
@@ -94,11 +94,15 @@ convert_keycode(SDL_Keycode from, enum android_keycode *to, uint16_t mod,
         MAP(SDLK_UP,           AKEYCODE_DPAD_UP);
     }
 
-    if (prefer_text) {
+    if (pref == PREFER_TEXT_EVENTS_ALWAYS) {
-        // do not forward alpha and space key events
+        // never forward key events
         return false;
     }
 
+    // forward all supported key events
+    SDL_assert(pref == PREFER_TEXT_EVENTS_NEVER ||
+               pref == PREFER_TEXT_EVENTS_NON_ALPHA);
+
     if (mod & (KMOD_LALT | KMOD_RALT | KMOD_LGUI | KMOD_RGUI)) {
         return false;
     }

app/src/event_converter.h

@@ -2,10 +2,12 @@
 #define CONVERT_H
 
 #include <stdbool.h>
+#include <SDL2/SDL_assert.h>
 #include <SDL2/SDL_events.h>
 
 #include "config.h"
 #include "control_msg.h"
+#include "input_manager.h"
 
 bool
 convert_keycode_action(SDL_EventType from, enum android_keyevent_action *to);
@@ -15,7 +17,7 @@ convert_meta_state(SDL_Keymod mod);
 
 bool
 convert_keycode(SDL_Keycode from, enum android_keycode *to, uint16_t mod,
-                bool prefer_text);
+                enum text_events_pref pref);
 
 enum android_motionevent_buttons
 convert_mouse_buttons(uint32_t state);

app/src/input_manager.c

@@ -214,7 +214,12 @@ clipboard_paste(struct controller *controller) {
 void
 input_manager_process_text_input(struct input_manager *im,
                                  const SDL_TextInputEvent *event) {
-    if (!im->prefer_text) {
+    if (im->text_events_pref == PREFER_TEXT_EVENTS_NEVER) {
+        // ignore all text events (key events will be injected instead)
+        return;
+    }
+
+    if (im->text_events_pref == PREFER_TEXT_EVENTS_NON_ALPHA) {
         char c = event->text[0];
         if (isalpha(c) || c == ' ') {
             SDL_assert(event->text[1] == '\0');
@@ -238,7 +243,7 @@ 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) {
+                  enum text_events_pref pref) {
     to->type = CONTROL_MSG_TYPE_INJECT_KEYCODE;
 
     if (!convert_keycode_action(from->type, &to->inject_keycode.action)) {
@@ -247,7 +252,7 @@ convert_input_key(const SDL_KeyboardEvent *from, struct control_msg *to,
 
     uint16_t mod = from->keysym.mod;
     if (!convert_keycode(from->keysym.sym, &to->inject_keycode.keycode, mod,
-                         prefer_text)) {
+                         pref)) {
         return false;
     }
 
@@ -398,7 +403,7 @@ input_manager_process_key(struct input_manager *im,
     }
 
     struct control_msg msg;
-    if (convert_input_key(event, &msg, im->prefer_text)) {
+    if (convert_input_key(event, &msg, im->text_events_pref)) {
         if (!controller_push_msg(controller, &msg)) {
             LOGW("Could not request 'inject keycode'");
         }

app/src/input_manager.h

@@ -10,11 +10,17 @@
 #include "video_buffer.h"
 #include "screen.h"
 
+enum text_events_pref {
+    PREFER_TEXT_EVENTS_ALWAYS,
+    PREFER_TEXT_EVENTS_NON_ALPHA,
+    PREFER_TEXT_EVENTS_NEVER,
+};
+
 struct input_manager {
     struct controller *controller;
     struct video_buffer *video_buffer;
     struct screen *screen;
-    bool prefer_text;
+    enum text_events_pref text_events_pref;
 };
 
 void

app/src/main.c

@@ -11,6 +11,7 @@
 #include "config.h"
 #include "compat.h"
 #include "log.h"
+#include "input_manager.h"
 #include "recorder.h"
 
 struct args {
@@ -67,12 +68,17 @@ static void usage(const char *arg0) {
         "        Set the TCP port the client listens on.\n"
         "        Default is %d.\n"
         "\n"
-        "    --prefer-text\n"
+        "    --prefer-text-events mode\n"
-        "        Inject alpha characters and space as text events instead of\n"
+        "        Configure how key/text events are forwarded to the Android\n"
-        "        key events.\n"
+        "        device.\n"
-        "        This avoids issues when combining multiple keys to enter a\n"
+        "        Possible values are:\n"
-        "        special character, but breaks the expected behavior of alpha\n"
+        "          always:\n"
-        "        keys in games (typically WASD).\n"
+        "            Every text is sent as text. (default)\n"
+        "          non-alpha:\n"
+        "            Only letters are sent as a sequence of key events, other\n"
+        "            characters are sent as text.\n"
+        "          never:\n"
+        "            Every text is sent as a sequence of key events.\n"
         "\n"
         "    --push-target path\n"
         "        Set the target directory for pushing files to the device by\n"
@@ -301,35 +307,57 @@ guess_record_format(const char *filename) {
     return 0;
 }
 
+static bool
+parse_prefer_text_events(const char *optarg,
+                         enum text_events_pref *pref) {
+    if (!strcmp(optarg, "always")) {
+        *pref = PREFER_TEXT_EVENTS_ALWAYS;
+        return true;
+    }
+
+    if (!strcmp(optarg, "non-alpha")) {
+        *pref = PREFER_TEXT_EVENTS_NON_ALPHA;
+        return true;
+    }
+
+    if (!strcmp(optarg, "never")) {
+        *pref = PREFER_TEXT_EVENTS_NEVER;
+        return true;
+    }
+
+    LOGE("Unsupported text events preference: %s"
+         "(expected 'always', 'non-alpha' or 'never')", optarg);
+    return false;
+}
+
 #define OPT_RENDER_EXPIRED_FRAMES 1000
 #define OPT_WINDOW_TITLE          1001
 #define OPT_PUSH_TARGET           1002
-#define OPT_ALWAYS_ON_TOP         1003
+#define OPT_PREFER_TEXT_EVENTS    1003
-#define OPT_CROP                  1004
-#define OPT_RECORD_FORMAT         1005
-#define OPT_PREFER_TEXT           1006
 
 static bool
 parse_args(struct args *args, int argc, char *argv[]) {
     static const struct option long_options[] = {
-        {"always-on-top",         no_argument,       NULL, OPT_ALWAYS_ON_TOP},
+        {"always-on-top",         no_argument,       NULL, 'T'},
         {"bit-rate",              required_argument, NULL, 'b'},
-        {"crop",                  required_argument, NULL, OPT_CROP},
+        {"crop",                  required_argument, NULL, 'c'},
         {"fullscreen",            no_argument,       NULL, 'f'},
         {"help",                  no_argument,       NULL, 'h'},
         {"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},
+        {"push-target",           required_argument, NULL,
+                                                 OPT_PUSH_TARGET},
         {"record",                required_argument, NULL, 'r'},
-        {"record-format",         required_argument, NULL, OPT_RECORD_FORMAT},
+        {"record-format",         required_argument, NULL, 'F'},
         {"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},
+        {"prefer-text-events",    required_argument, NULL,
+                                                 OPT_PREFER_TEXT_EVENTS},
         {"version",               no_argument,       NULL, 'v'},
         {"window-title",          required_argument, NULL,
                                                  OPT_WINDOW_TITLE},
@@ -348,18 +376,12 @@ parse_args(struct args *args, int argc, char *argv[]) {
                 }
                 break;
             case 'c':
-                LOGW("Deprecated option -c. Use --crop instead.");
-                // fall through
-            case OPT_CROP:
                 opts->crop = optarg;
                 break;
             case 'f':
                 opts->fullscreen = true;
                 break;
             case 'F':
-                LOGW("Deprecated option -F. Use --record-format instead.");
-                // fall through
-            case OPT_RECORD_FORMAT:
                 if (!parse_record_format(optarg, &opts->record_format)) {
                     return false;
                 }
@@ -396,9 +418,6 @@ parse_args(struct args *args, int argc, char *argv[]) {
                 opts->show_touches = true;
                 break;
             case 'T':
-                LOGW("Deprecated option -T. Use --always-on-top instead.");
-                // fall through
-            case OPT_ALWAYS_ON_TOP:
                 opts->always_on_top = true;
                 break;
             case 'v':
@@ -413,8 +432,11 @@ parse_args(struct args *args, int argc, char *argv[]) {
             case OPT_PUSH_TARGET:
                 opts->push_target = optarg;
                 break;
-            case OPT_PREFER_TEXT:
+            case OPT_PREFER_TEXT_EVENTS:
-                opts->prefer_text = true;
+                if (!parse_prefer_text_events(optarg,
+                                              &opts->text_events_pref)) {
+                    return false;
+                }
                 break;
             default:
                 // getopt prints the error message on stderr

app/src/recorder.c

@@ -174,16 +174,11 @@ recorder_open(struct recorder *recorder, const AVCodec *input_codec) {
 
 void
 recorder_close(struct recorder *recorder) {
-    if (recorder->header_written) {
     int ret = av_write_trailer(recorder->ctx);
     if (ret < 0) {
         LOGE("Failed to write trailer to %s", recorder->filename);
         recorder->failed = true;
     }
-    } else {
-        // the recorded file is empty
-        recorder->failed = true;
-    }
     avio_close(recorder->ctx->pb);
     avformat_free_context(recorder->ctx);
 

app/src/scrcpy.c

@@ -42,7 +42,7 @@ static struct input_manager input_manager = {
     .controller = &controller,
     .video_buffer = &video_buffer,
     .screen = &screen,
-    .prefer_text = false, // initialized later
+    .text_events_pref = 0, // initialized later
 };
 
 // init SDL and set appropriate hints
@@ -415,7 +415,7 @@ scrcpy(const struct scrcpy_options *options) {
         show_touches_waited = true;
     }
 
-    input_manager.prefer_text = options->prefer_text;
+    input_manager.text_events_pref = options->text_events_pref;
 
     ret = event_loop(options->display, options->control);
     LOGD("quit...");

app/src/scrcpy.h

@@ -15,6 +15,7 @@ struct scrcpy_options {
     const char *window_title;
     const char *push_target;
     enum recorder_format record_format;
+    enum text_events_pref text_events_pref;
     uint16_t port;
     uint16_t max_size;
     uint32_t bit_rate;
@@ -25,7 +26,6 @@ struct scrcpy_options {
     bool display;
     bool turn_screen_off;
     bool render_expired_frames;
-    bool prefer_text;
 };
 
 #define SCRCPY_OPTIONS_DEFAULT { \
@@ -35,6 +35,7 @@ struct scrcpy_options {
     .window_title = NULL, \
     .push_target = NULL, \
     .record_format = RECORDER_FORMAT_AUTO, \
+    .text_events_pref = PREFER_TEXT_EVENTS_ALWAYS, \
     .port = DEFAULT_LOCAL_PORT, \
     .max_size = DEFAULT_LOCAL_PORT, \
     .bit_rate = DEFAULT_BIT_RATE, \
@@ -45,7 +46,6 @@ struct scrcpy_options {
     .display = true, \
     .turn_screen_off = false, \
     .render_expired_frames = false, \
-    .prefer_text = false, \
 }
 
 bool

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

@@ -7,7 +7,6 @@ import android.media.MediaCodec;
 import android.media.MediaCodecInfo;
 import android.media.MediaFormat;
 import android.os.IBinder;
-import android.os.Looper;
 import android.view.Surface;
 
 import java.io.FileDescriptor;
@@ -55,11 +54,6 @@ public class ScreenEncoder implements Device.RotationListener {
     }
 
     public void streamScreen(Device device, FileDescriptor fd) throws IOException {
-        // Some devices internally create a Handler when creating an input Surface, causing an exception:
-        // "Can't create handler inside thread that has not called Looper.prepare()"
-        // <https://github.com/Genymobile/scrcpy/issues/240>
-        Looper.prepareMainLooper();
-
         MediaFormat format = createFormat(bitRate, frameRate, iFrameInterval);
         device.setRotationListener(this);
         boolean alive;