Request scan media on push

After a file is pushed, send a broadcast to request the media scanner to
scan the "push target" directory.

In practice, this allows some apps to detect the new file immediately.

README.md

@@ -303,8 +303,7 @@ To start scrcpy using a v4l2 sink:
 
 ```bash
 scrcpy --v4l2-sink=/dev/videoN
-scrcpy --v4l2-sink=/dev/videoN --no-display  # disable mirroring window
+scrcpy --v4l2-sink=/dev/videoN -N  # --no-display to disable mirroring window
-scrcpy --v4l2-sink=/dev/videoN -N            # short version
 ```
 
 (replace `N` by the device ID, check with `ls /dev/video*`)
@@ -710,15 +709,15 @@ There is no visual feedback, a log is printed to the console.
 
 #### Push file to device
 
-To push a file to `/sdcard/Download/` on the device, drag & drop a (non-APK)
+To push a file to `/sdcard/` on the device, drag & drop a (non-APK) file to the
-file to the _scrcpy_ window.
+_scrcpy_ window.
 
 There is no visual feedback, a log is printed to the console.
 
 The target directory can be changed on start:
 
 ```bash
-scrcpy --push-target=/sdcard/Movies/
+scrcpy --push-target=/sdcard/Download/
 ```
 
 

app/scrcpy.1

@@ -133,7 +133,7 @@ but breaks the expected behavior of alpha keys in games (typically WASD).
 .BI "\-\-push\-target " path
 Set the target directory for pushing files to the device by drag & drop. It is passed as\-is to "adb push".
 
-Default is "/sdcard/Download/".
+Default is "/sdcard/".
 
 .TP
 .BI "\-r, \-\-record " file

app/src/adb.c

@@ -81,20 +81,14 @@ show_adb_installation_msg() {
 
 static void
 show_adb_err_msg(enum process_result err, const char *const argv[]) {
-#define MAX_COMMAND_STRING_LEN 1024
+    char buf[512];
-    char *buf = malloc(MAX_COMMAND_STRING_LEN);
-    if (!buf) {
-        LOGE("Failed to execute (could not allocate error message)");
-        return;
-    }
-
     switch (err) {
         case PROCESS_ERROR_GENERIC:
-            argv_to_string(argv, buf, MAX_COMMAND_STRING_LEN);
+            argv_to_string(argv, buf, sizeof(buf));
             LOGE("Failed to execute: %s", buf);
             break;
         case PROCESS_ERROR_MISSING_BINARY:
-            argv_to_string(argv, buf, MAX_COMMAND_STRING_LEN);
+            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)");
@@ -104,38 +98,29 @@ show_adb_err_msg(enum process_result err, const char *const argv[]) {
             // do nothing
             break;
     }
-
-    free(buf);
 }
 
 process_t
 adb_execute(const char *serial, const char *const adb_cmd[], size_t len) {
+    const char *cmd[len + 4];
     int i;
     process_t process;
-
+    cmd[0] = get_adb_command();
-    const char **argv = malloc((len + 4) * sizeof(*argv));
-    if (!argv) {
-        return PROCESS_NONE;
-    }
-
-    argv[0] = get_adb_command();
     if (serial) {
-        argv[1] = "-s";
+        cmd[1] = "-s";
-        argv[2] = serial;
+        cmd[2] = serial;
         i = 3;
     } else {
         i = 1;
     }
 
-    memcpy(&argv[i], adb_cmd, len * sizeof(const char *));
+    memcpy(&cmd[i], adb_cmd, len * sizeof(const char *));
-    argv[len + i] = NULL;
+    cmd[len + i] = NULL;
-    enum process_result r = process_execute(argv, &process);
+    enum process_result r = process_execute(cmd, &process);
     if (r != PROCESS_SUCCESS) {
-        show_adb_err_msg(r, argv);
+        show_adb_err_msg(r, cmd);
-        process = PROCESS_NONE;
+        return PROCESS_NONE;
     }
-
-    free(argv);
     return process;
 }
 

app/src/cli.c

@@ -129,7 +129,7 @@ scrcpy_print_usage(const char *arg0) {
         "    --push-target path\n"
         "        Set the target directory for pushing files to the device by\n"
         "        drag & drop. It is passed as-is to \"adb push\".\n"
-        "        Default is \"/sdcard/Download/\".\n"
+        "        Default is \"/sdcard/\".\n"
         "\n"
         "    -r, --record file.mp4\n"
         "        Record screen to file.\n"

app/src/control_msg.c

@@ -80,6 +80,13 @@ control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
         case CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE:
             buf[1] = msg->set_screen_power_mode.mode;
             return 2;
+        case CONTROL_MSG_TYPE_SCAN_MEDIA:
+        {
+            size_t len = write_string(msg->scan_media.path,
+                                      CONTROL_MSG_SCAN_MEDIA_PATH_MAX_LENGTH,
+                                      &buf[1]);
+            return 1 + len;
+        }
         case CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL:
         case CONTROL_MSG_TYPE_EXPAND_SETTINGS_PANEL:
         case CONTROL_MSG_TYPE_COLLAPSE_PANELS:
@@ -102,6 +109,9 @@ control_msg_destroy(struct control_msg *msg) {
         case CONTROL_MSG_TYPE_SET_CLIPBOARD:
             free(msg->set_clipboard.text);
             break;
+        case CONTROL_MSG_TYPE_SCAN_MEDIA:
+            free(msg->scan_media.path);
+            break;
         default:
             // do nothing
             break;

app/src/control_msg.h

@@ -17,6 +17,8 @@
 // type: 1 byte; paste flag: 1 byte; length: 4 bytes
 #define CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH (CONTROL_MSG_MAX_SIZE - 6)
 
+#define CONTROL_MSG_SCAN_MEDIA_PATH_MAX_LENGTH 256
+
 #define POINTER_ID_MOUSE UINT64_C(-1);
 #define POINTER_ID_VIRTUAL_FINGER UINT64_C(-2);
 
@@ -33,6 +35,7 @@ enum control_msg_type {
     CONTROL_MSG_TYPE_SET_CLIPBOARD,
     CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE,
     CONTROL_MSG_TYPE_ROTATE_DEVICE,
+    CONTROL_MSG_TYPE_SCAN_MEDIA,
 };
 
 enum screen_power_mode {
@@ -76,6 +79,9 @@ struct control_msg {
         struct {
             enum screen_power_mode mode;
         } set_screen_power_mode;
+        struct {
+            char *path; // owned, to be freed by free()
+        } scan_media;
     };
 };
 

app/src/file_handler.c

@@ -4,9 +4,11 @@
 #include <string.h>
 
 #include "adb.h"
+#include "control_msg.h"
+#include "controller.h"
 #include "util/log.h"
 
-#define DEFAULT_PUSH_TARGET "/sdcard/Download/"
+#define DEFAULT_PUSH_TARGET "/sdcard/"
 
 static void
 file_handler_request_destroy(struct file_handler_request *req) {
@@ -14,7 +16,8 @@ file_handler_request_destroy(struct file_handler_request *req) {
 }
 
 bool
-file_handler_init(struct file_handler *file_handler, const char *serial,
+file_handler_init(struct file_handler *file_handler,
+                  struct controller *controller, const char *serial,
                   const char *push_target) {
 
     cbuf_init(&file_handler->queue);
@@ -50,6 +53,8 @@ file_handler_init(struct file_handler *file_handler, const char *serial,
 
     file_handler->push_target = push_target ? push_target : DEFAULT_PUSH_TARGET;
 
+    file_handler->controller = controller;
+
     return true;
 }
 
@@ -103,6 +108,24 @@ file_handler_request(struct file_handler *file_handler,
     return res;
 }
 
+static bool
+request_scan_media(struct file_handler *file_handler) {
+    struct control_msg msg;
+    msg.type = CONTROL_MSG_TYPE_SCAN_MEDIA;
+    msg.scan_media.path = strdup(file_handler->push_target);
+    if (!msg.scan_media.path) {
+        LOGW("Could not strdup() media path");
+        return false;
+    }
+
+    if (!controller_push_msg(file_handler->controller, &msg)) {
+        LOGW("Could not request 'scan media'");
+        return false;
+    }
+
+    return true;
+}
+
 static int
 run_file_handler(void *data) {
     struct file_handler *file_handler = data;
@@ -145,6 +168,7 @@ run_file_handler(void *data) {
             if (process_check_success(process, "adb push", false)) {
                 LOGI("%s successfully pushed to %s", req.file,
                                                      file_handler->push_target);
+                request_scan_media(file_handler);
             } else {
                 LOGE("Failed to push %s to %s", req.file,
                                                 file_handler->push_target);

app/src/file_handler.h

@@ -22,6 +22,7 @@ struct file_handler_request {
 struct file_handler_request_queue CBUF(struct file_handler_request, 16);
 
 struct file_handler {
+    struct controller *controller;
     char *serial;
     const char *push_target;
     sc_thread thread;
@@ -34,7 +35,8 @@ struct file_handler {
 };
 
 bool
-file_handler_init(struct file_handler *file_handler, const char *serial,
+file_handler_init(struct file_handler *file_handler,
+                  struct controller *controller, const char *serial,
                   const char *push_target);
 
 void

app/src/recorder.c

@@ -35,14 +35,11 @@ record_packet_new(const AVPacket *packet) {
         return NULL;
     }
 
-    rec->packet = av_packet_alloc();
+    // av_packet_ref() does not initialize all fields in old FFmpeg versions
-    if (!rec->packet) {
+    // See <https://github.com/Genymobile/scrcpy/issues/707>
-        free(rec);
+    av_init_packet(&rec->packet);
-        return NULL;
-    }
 
-    if (av_packet_ref(rec->packet, packet)) {
+    if (av_packet_ref(&rec->packet, packet)) {
-        av_packet_free(&rec->packet);
         free(rec);
         return NULL;
     }
@@ -51,8 +48,7 @@ record_packet_new(const AVPacket *packet) {
 
 static void
 record_packet_delete(struct record_packet *rec) {
-    av_packet_unref(rec->packet);
+    av_packet_unref(&rec->packet);
-    av_packet_free(&rec->packet);
     free(rec);
 }
 
@@ -148,8 +144,8 @@ run_recorder(void *data) {
             struct record_packet *last = recorder->previous;
             if (last) {
                 // assign an arbitrary duration to the last packet
-                last->packet->duration = 100000;
+                last->packet.duration = 100000;
-                bool ok = recorder_write(recorder, last->packet);
+                bool ok = recorder_write(recorder, &last->packet);
                 if (!ok) {
                     // failing to write the last frame is not very serious, no
                     // future frame may depend on it, so the resulting file
@@ -176,14 +172,13 @@ run_recorder(void *data) {
         }
 
         // config packets have no PTS, we must ignore them
-        if (rec->packet->pts != AV_NOPTS_VALUE
+        if (rec->packet.pts != AV_NOPTS_VALUE
-            && previous->packet->pts != AV_NOPTS_VALUE) {
+            && previous->packet.pts != AV_NOPTS_VALUE) {
             // we now know the duration of the previous packet
-            previous->packet->duration =
+            previous->packet.duration = rec->packet.pts - previous->packet.pts;
-                rec->packet->pts - previous->packet->pts;
         }
 
-        bool ok = recorder_write(recorder, previous->packet);
+        bool ok = recorder_write(recorder, &previous->packet);
         record_packet_delete(previous);
         if (!ok) {
             LOGE("Could not record packet");

app/src/recorder.h

@@ -13,7 +13,7 @@
 #include "util/thread.h"
 
 struct record_packet {
-    AVPacket *packet;
+    AVPacket packet;
     struct record_packet *next;
 };
 

app/src/scrcpy.c

@@ -297,14 +297,6 @@ scrcpy(const struct scrcpy_options *options) {
         goto end;
     }
 
-    if (options->display && options->control) {
-        if (!file_handler_init(&s->file_handler, s->server.serial,
-                               options->push_target)) {
-            goto end;
-        }
-        file_handler_initialized = true;
-    }
-
     struct decoder *dec = NULL;
     bool needs_decoder = options->display;
 #ifdef HAVE_V4L2
@@ -353,6 +345,12 @@ scrcpy(const struct scrcpy_options *options) {
                 goto end;
             }
             controller_started = true;
+
+            if (!file_handler_init(&s->file_handler, &s->controller,
+                                   s->server.serial, options->push_target)) {
+                goto end;
+            }
+            file_handler_initialized = true;
         }
 
         const char *window_title =

app/src/screen.c

@@ -41,18 +41,6 @@ get_window_size(const struct screen *screen) {
     return size;
 }
 
-static struct point
-get_window_position(const struct screen *screen) {
-    int x;
-    int y;
-    SDL_GetWindowPosition(screen->window, &x, &y);
-
-    struct point point;
-    point.x = x;
-    point.y = y;
-    return point;
-}
-
 // set the window size to be applied when fullscreen is disabled
 static void
 set_window_size(struct screen *screen, struct size new_size) {
@@ -134,6 +122,13 @@ get_optimal_size(struct size current_size, struct size content_size) {
     return window_size;
 }
 
+// same as get_optimal_size(), but read the current size from the window
+static inline struct size
+get_optimal_window_size(const struct screen *screen, struct size content_size) {
+    struct size window_size = get_window_size(screen);
+    return get_optimal_size(window_size, content_size);
+}
+
 // initially, there is no current size, so use the frame size as current size
 // req_width and req_height, if not 0, are the sizes requested by the user
 static inline struct size
@@ -667,20 +662,9 @@ screen_resize_to_fit(struct screen *screen) {
         return;
     }
 
-    struct point point = get_window_position(screen);
-    struct size window_size = get_window_size(screen);
-
     struct size optimal_size =
-        get_optimal_size(window_size, screen->content_size);
+        get_optimal_window_size(screen, screen->content_size);
-
-    // Center the window related to the device screen
-    assert(optimal_size.width <= window_size.width);
-    assert(optimal_size.height <= window_size.height);
-    uint32_t new_x = point.x + (window_size.width - optimal_size.width) / 2;
-    uint32_t new_y = point.y + (window_size.height - optimal_size.height) / 2;
-
     SDL_SetWindowSize(screen->window, optimal_size.width, optimal_size.height);
-    SDL_SetWindowPosition(screen->window, new_x, new_y);
     LOGD("Resized to optimal size: %ux%u", optimal_size.width,
                                            optimal_size.height);
 }
@@ -742,7 +726,6 @@ screen_handle_event(struct screen *screen, SDL_Event *event) {
                     }
                     screen->maximized = false;
                     apply_pending_resize(screen);
-                    screen_render(screen, true);
                     break;
             }
             return true;

app/src/stream.c

@@ -104,38 +104,33 @@ static bool
 stream_push_packet(struct stream *stream, AVPacket *packet) {
     bool is_config = packet->pts == AV_NOPTS_VALUE;
 
-    // A config packet must not be decoded immediately (it contains no
+    // A config packet must not be decoded immetiately (it contains no
     // frame); instead, it must be concatenated with the future data packet.
-    if (stream->pending || is_config) {
+    if (stream->has_pending || is_config) {
         size_t offset;
-        if (stream->pending) {
+        if (stream->has_pending) {
-            offset = stream->pending->size;
+            offset = stream->pending.size;
-            if (av_grow_packet(stream->pending, packet->size)) {
+            if (av_grow_packet(&stream->pending, packet->size)) {
                 LOGE("Could not grow packet");
                 return false;
             }
         } else {
             offset = 0;
-            stream->pending = av_packet_alloc();
+            if (av_new_packet(&stream->pending, packet->size)) {
-            if (!stream->pending) {
-                LOGE("Could not allocate packet");
-                return false;
-            }
-            if (av_new_packet(stream->pending, packet->size)) {
                 LOGE("Could not create packet");
-                av_packet_free(&stream->pending);
                 return false;
             }
+            stream->has_pending = true;
         }
 
-        memcpy(stream->pending->data + offset, packet->data, packet->size);
+        memcpy(stream->pending.data + offset, packet->data, packet->size);
 
         if (!is_config) {
             // prepare the concat packet to send to the decoder
-            stream->pending->pts = packet->pts;
+            stream->pending.pts = packet->pts;
-            stream->pending->dts = packet->dts;
+            stream->pending.dts = packet->dts;
-            stream->pending->flags = packet->flags;
+            stream->pending.flags = packet->flags;
-            packet = stream->pending;
+            packet = &stream->pending;
         }
     }
 
@@ -149,10 +144,10 @@ stream_push_packet(struct stream *stream, AVPacket *packet) {
         // data packet
         bool ok = stream_parse(stream, packet);
 
-        if (stream->pending) {
+        if (stream->has_pending) {
             // the pending packet must be discarded (consumed or error)
-            av_packet_unref(stream->pending);
+            stream->has_pending = false;
-            av_packet_free(&stream->pending);
+            av_packet_unref(&stream->pending);
         }
 
         if (!ok) {
@@ -220,21 +215,16 @@ run_stream(void *data) {
     // It's more complicated, but this allows to reduce the latency by 1 frame!
     stream->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
 
-    AVPacket *packet = av_packet_alloc();
-    if (!packet) {
-        LOGE("Could not allocate packet");
-        goto finally_close_parser;
-    }
-
     for (;;) {
-        bool ok = stream_recv_packet(stream, packet);
+        AVPacket packet;
+        bool ok = stream_recv_packet(stream, &packet);
         if (!ok) {
             // end of stream
             break;
         }
 
-        ok = stream_push_packet(stream, packet);
+        ok = stream_push_packet(stream, &packet);
-        av_packet_unref(packet);
+        av_packet_unref(&packet);
         if (!ok) {
             // cannot process packet (error already logged)
             break;
@@ -243,13 +233,10 @@ run_stream(void *data) {
 
     LOGD("End of frames");
 
-    if (stream->pending) {
+    if (stream->has_pending) {
-        av_packet_unref(stream->pending);
+        av_packet_unref(&stream->pending);
-        av_packet_free(&stream->pending);
     }
 
-    av_packet_free(&packet);
-finally_close_parser:
     av_parser_close(stream->parser);
 finally_close_sinks:
     stream_close_sinks(stream);
@@ -265,7 +252,7 @@ void
 stream_init(struct stream *stream, socket_t socket,
             const struct stream_callbacks *cbs, void *cbs_userdata) {
     stream->socket = socket;
-    stream->pending = NULL;
+    stream->has_pending = false;
     stream->sink_count = 0;
 
     assert(cbs && cbs->on_eos);

app/src/stream.h

@@ -24,7 +24,8 @@ struct stream {
     AVCodecParserContext *parser;
     // successive packets may need to be concatenated, until a non-config
     // packet is available
-    AVPacket *pending;
+    bool has_pending;
+    AVPacket pending;
 
     const struct stream_callbacks *cbs;
     void *cbs_userdata;

app/src/sys/win/process.c

@@ -6,9 +6,7 @@
 #include "util/log.h"
 #include "util/str_util.h"
 
-#define CMD_MAX_LEN 8192
+static int
-
-static bool
 build_cmd(char *cmd, size_t len, const char *const argv[]) {
     // Windows command-line parsing is WTF:
     // <http://daviddeley.com/autohotkey/parameters/parameters.htm#WINPASS>
@@ -17,9 +15,9 @@ build_cmd(char *cmd, size_t len, const char *const argv[]) {
     size_t ret = xstrjoin(cmd, argv, ' ', len);
     if (ret >= len) {
         LOGE("Command too long (%" PRIsizet " chars)", len - 1);
-        return false;
+        return -1;
     }
-    return true;
+    return 0;
 }
 
 enum process_result
@@ -29,14 +27,13 @@ process_execute(const char *const argv[], HANDLE *handle) {
     memset(&si, 0, sizeof(si));
     si.cb = sizeof(si);
 
-    char *cmd = malloc(CMD_MAX_LEN);
+    char cmd[256];
-    if (!cmd || !build_cmd(cmd, CMD_MAX_LEN, argv)) {
+    if (build_cmd(cmd, sizeof(cmd), argv)) {
         *handle = NULL;
         return PROCESS_ERROR_GENERIC;
     }
 
     wchar_t *wide = utf8_to_wide_char(cmd);
-    free(cmd);
     if (!wide) {
         LOGC("Could not allocate wide char string");
         return PROCESS_ERROR_GENERIC;

app/src/v4l2_sink.c

@@ -86,7 +86,7 @@ encode_and_write_frame(struct sc_v4l2_sink *vs, const AVFrame *frame) {
         return false;
     }
 
-    AVPacket *packet = vs->packet;
+    AVPacket *packet = &vs->packet;
     ret = avcodec_receive_packet(vs->encoder_ctx, packet);
     if (ret == 0) {
         // A packet was received
@@ -235,17 +235,11 @@ sc_v4l2_sink_open(struct sc_v4l2_sink *vs) {
         goto error_avcodec_close;
     }
 
-    vs->packet = av_packet_alloc();
-    if (!vs->packet) {
-        LOGE("Could not allocate packet");
-        goto error_av_frame_free;
-    }
-
     LOGD("Starting v4l2 thread");
     ok = sc_thread_create(&vs->thread, run_v4l2_sink, "v4l2", vs);
     if (!ok) {
         LOGC("Could not start v4l2 thread");
-        goto error_av_packet_free;
+        goto error_av_frame_free;
     }
 
     vs->header_written = false;
@@ -255,8 +249,6 @@ sc_v4l2_sink_open(struct sc_v4l2_sink *vs) {
 
     return true;
 
-error_av_packet_free:
-    av_packet_free(&vs->packet);
 error_av_frame_free:
     av_frame_free(&vs->frame);
 error_avcodec_close:
@@ -286,7 +278,6 @@ sc_v4l2_sink_close(struct sc_v4l2_sink *vs) {
 
     sc_thread_join(&vs->thread, NULL);
 
-    av_packet_free(&vs->packet);
     av_frame_free(&vs->frame);
     avcodec_close(vs->encoder_ctx);
     avcodec_free_context(&vs->encoder_ctx);

app/src/v4l2_sink.h

@@ -26,7 +26,7 @@ struct sc_v4l2_sink {
     bool header_written;
 
     AVFrame *frame;
-    AVPacket *packet;
+    AVPacket packet;
 };
 
 bool

app/tests/test_control_msg_serialize.c

@@ -278,6 +278,28 @@ static void test_serialize_rotate_device(void) {
     assert(!memcmp(buf, expected, sizeof(expected)));
 }
 
+static void test_serialize_scan_media(void) {
+    struct control_msg msg = {
+        .type = CONTROL_MSG_TYPE_SCAN_MEDIA,
+        .scan_media = {
+            .path = "/sdcard/Download/",
+        },
+    };
+
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
+    size_t size = control_msg_serialize(&msg, buf);
+    assert(size == 22);
+
+    const unsigned char expected[] = {
+        CONTROL_MSG_TYPE_SCAN_MEDIA,
+        0x00, 0x00, 0x00, 0x11, // path length
+        '/', 's', 'd', 'c', 'a', 'r', 'd', '/',
+        'D', 'o', 'w', 'n', 'l', 'o', 'a', 'd',
+        '/' // path
+    };
+    assert(!memcmp(buf, expected, sizeof(expected)));
+}
+
 int main(int argc, char *argv[]) {
     (void) argc;
     (void) argv;
@@ -295,5 +317,6 @@ int main(int argc, char *argv[]) {
     test_serialize_set_clipboard();
     test_serialize_set_screen_power_mode();
     test_serialize_rotate_device();
+    test_serialize_scan_media();
     return 0;
 }

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

@@ -17,6 +17,7 @@ public final class ControlMessage {
     public static final int TYPE_SET_CLIPBOARD = 9;
     public static final int TYPE_SET_SCREEN_POWER_MODE = 10;
     public static final int TYPE_ROTATE_DEVICE = 11;
+    public static final int TYPE_SCAN_MEDIA = 12;
 
     private int type;
     private String text;
@@ -97,6 +98,13 @@ public final class ControlMessage {
         return msg;
     }
 
+    public static ControlMessage createScanMedia(String path) {
+        ControlMessage msg = new ControlMessage();
+        msg.type = TYPE_SCAN_MEDIA;
+        msg.text = path;
+        return msg;
+    }
+
     public static ControlMessage createEmpty(int type) {
         ControlMessage msg = new ControlMessage();
         msg.type = type;

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

@@ -76,6 +76,9 @@ public class ControlMessageReader {
             case ControlMessage.TYPE_SET_SCREEN_POWER_MODE:
                 msg = parseSetScreenPowerMode();
                 break;
+            case ControlMessage.TYPE_SCAN_MEDIA:
+                msg = parseScanMedia();
+                break;
             case ControlMessage.TYPE_EXPAND_NOTIFICATION_PANEL:
             case ControlMessage.TYPE_EXPAND_SETTINGS_PANEL:
             case ControlMessage.TYPE_COLLAPSE_PANELS:
@@ -182,6 +185,14 @@ public class ControlMessageReader {
         return ControlMessage.createSetScreenPowerMode(mode);
     }
 
+    private ControlMessage parseScanMedia() {
+        String path = parseString();
+        if (path == null) {
+            return null;
+        }
+        return ControlMessage.createScanMedia(path);
+    }
+
     private static Position readPosition(ByteBuffer buffer) {
         int x = buffer.getInt();
         int y = buffer.getInt();

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

@@ -1,5 +1,7 @@
 package com.genymobile.scrcpy;
 
+import android.content.Intent;
+import android.net.Uri;
 import android.os.Build;
 import android.os.SystemClock;
 import android.view.InputDevice;
@@ -7,6 +9,7 @@ import android.view.KeyCharacterMap;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 
+import java.io.File;
 import java.io.IOException;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
@@ -135,6 +138,13 @@ public class Controller {
             case ControlMessage.TYPE_ROTATE_DEVICE:
                 Device.rotateDevice();
                 break;
+            case ControlMessage.TYPE_SCAN_MEDIA:
+                String path = msg.getText();
+                @SuppressWarnings("deprecation")
+                Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+                intent.setData(Uri.fromFile(new File(path)));
+                Device.sendBroadcast(intent);
+                break;
             default:
                 // do nothing
         }

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

@@ -8,6 +8,7 @@ import com.genymobile.scrcpy.wrappers.SurfaceControl;
 import com.genymobile.scrcpy.wrappers.WindowManager;
 
 import android.content.IOnPrimaryClipChangedListener;
+import android.content.Intent;
 import android.graphics.Rect;
 import android.os.Build;
 import android.os.IBinder;
@@ -299,4 +300,8 @@ public final class Device {
     public static ContentProvider createSettingsProvider() {
         return SERVICE_MANAGER.getActivityManager().createSettingsProvider();
     }
+
+    public static void sendBroadcast(Intent intent) {
+        SERVICE_MANAGER.getActivityManager().sendBroadcast(intent);
+    }
 }

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

@@ -2,7 +2,9 @@ package com.genymobile.scrcpy.wrappers;
 
 import com.genymobile.scrcpy.Ln;
 
+import android.content.Intent;
 import android.os.Binder;
+import android.os.Bundle;
 import android.os.IBinder;
 import android.os.IInterface;
 
@@ -16,6 +18,7 @@ public class ActivityManager {
     private Method getContentProviderExternalMethod;
     private boolean getContentProviderExternalMethodNewVersion = true;
     private Method removeContentProviderExternalMethod;
+    private Method broadcastIntentMethod;
 
     public ActivityManager(IInterface manager) {
         this.manager = manager;
@@ -42,6 +45,22 @@ public class ActivityManager {
         return removeContentProviderExternalMethod;
     }
 
+    private Method getBroadcastIntentMethod() throws NoSuchMethodException {
+        if (broadcastIntentMethod == null) {
+            try {
+                Class<?> iApplicationThreadClass = Class.forName("android.app.IApplicationThread");
+                Class<?> iIntentReceiverClass = Class.forName("android.content.IIntentReceiver");
+                broadcastIntentMethod = manager.getClass()
+                        .getMethod("broadcastIntent", iApplicationThreadClass, Intent.class, String.class, iIntentReceiverClass, int.class,
+                                String.class, Bundle.class, String[].class, int.class, Bundle.class, boolean.class, boolean.class, int.class);
+                return broadcastIntentMethod;
+            } catch (ClassNotFoundException e) {
+                throw new AssertionError(e);
+            }
+        }
+        return broadcastIntentMethod;
+    }
+
     private ContentProvider getContentProviderExternal(String name, IBinder token) {
         try {
             Method method = getGetContentProviderExternalMethod();
@@ -84,4 +103,13 @@ public class ActivityManager {
     public ContentProvider createSettingsProvider() {
         return getContentProviderExternal("settings", new Binder());
     }
+
+    public void sendBroadcast(Intent intent) {
+        try {
+            Method method = getBroadcastIntentMethod();
+            method.invoke(manager, null, intent, null, null, 0, null, null, null, -1, null, true, false, ServiceManager.USER_ID);
+        } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
+            Ln.e("Could not invoke method", e);
+        }
+    }
 }

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

@@ -2,7 +2,6 @@ package com.genymobile.scrcpy.wrappers;
 
 import com.genymobile.scrcpy.Ln;
 
-import android.annotation.SuppressLint;
 import android.os.Bundle;
 import android.os.IBinder;
 
@@ -38,8 +37,6 @@ public class ContentProvider implements Closeable {
     private Method callMethod;
     private int callMethodVersion;
 
-    private Object attributionSource;
-
     ContentProvider(ActivityManager manager, Object provider, String name, IBinder token) {
         this.manager = manager;
         this.provider = provider;
@@ -47,58 +44,36 @@ public class ContentProvider implements Closeable {
         this.token = token;
     }
 
-    @SuppressLint("PrivateApi")
     private Method getCallMethod() throws NoSuchMethodException {
         if (callMethod == null) {
+
             try {
-                Class<?> attributionSourceClass = Class.forName("android.content.AttributionSource");
+                callMethod = provider.getClass()
-                callMethod = provider.getClass().getMethod("call", attributionSourceClass, String.class, String.class, String.class, Bundle.class);
+                        .getMethod("call", String.class, String.class, String.class, String.class, String.class, Bundle.class);
                 callMethodVersion = 0;
-            } catch (NoSuchMethodException | ClassNotFoundException e0) {
+            } catch (NoSuchMethodException e) {
                 // old versions
                 try {
-                    callMethod = provider.getClass()
+                    callMethod = provider.getClass().getMethod("call", String.class, String.class, String.class, String.class, Bundle.class);
-                            .getMethod("call", String.class, String.class, String.class, String.class, String.class, Bundle.class);
                     callMethodVersion = 1;
-                } catch (NoSuchMethodException e1) {
+                } catch (NoSuchMethodException e2) {
-                    try {
+                    callMethod = provider.getClass().getMethod("call", String.class, String.class, String.class, Bundle.class);
-                        callMethod = provider.getClass().getMethod("call", String.class, String.class, String.class, String.class, Bundle.class);
+                    callMethodVersion = 2;
-                        callMethodVersion = 2;
-                    } catch (NoSuchMethodException e2) {
-                        callMethod = provider.getClass().getMethod("call", String.class, String.class, String.class, Bundle.class);
-                        callMethodVersion = 3;
-                    }
                 }
             }
         }
         return callMethod;
     }
 
-    @SuppressLint("PrivateApi")
-    private Object getAttributionSource()
-            throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
-        if (attributionSource == null) {
-            Class<?> cl = Class.forName("android.content.AttributionSource$Builder");
-            Object builder = cl.getConstructor(int.class).newInstance(ServiceManager.USER_ID);
-            cl.getDeclaredMethod("setPackageName", String.class).invoke(builder, ServiceManager.PACKAGE_NAME);
-            attributionSource = cl.getDeclaredMethod("build").invoke(builder);
-        }
-
-        return attributionSource;
-    }
-
     private Bundle call(String callMethod, String arg, Bundle extras) {
         try {
             Method method = getCallMethod();
             Object[] args;
             switch (callMethodVersion) {
                 case 0:
-                    args = new Object[]{getAttributionSource(), "settings", callMethod, arg, extras};
-                    break;
-                case 1:
                     args = new Object[]{ServiceManager.PACKAGE_NAME, null, "settings", callMethod, arg, extras};
                     break;
-                case 2:
+                case 1:
                     args = new Object[]{ServiceManager.PACKAGE_NAME, "settings", callMethod, arg, extras};
                     break;
                 default:
@@ -106,7 +81,7 @@ public class ContentProvider implements Closeable {
                     break;
             }
             return (Bundle) method.invoke(provider, args);
-        } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException | ClassNotFoundException | InstantiationException e) {
+        } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
             Ln.e("Could not invoke method", e);
             return null;
         }

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

@@ -314,6 +314,26 @@ public class ControlMessageReaderTest {
         Assert.assertEquals(ControlMessage.TYPE_ROTATE_DEVICE, event.getType());
     }
 
+    @Test
+    public void testScanMedia() throws IOException {
+        ControlMessageReader reader = new ControlMessageReader();
+
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        DataOutputStream dos = new DataOutputStream(bos);
+        dos.writeByte(ControlMessage.TYPE_SCAN_MEDIA);
+        byte[] text = "/sdcard/Download/".getBytes(StandardCharsets.UTF_8);
+        dos.writeInt(text.length);
+        dos.write(text);
+
+        byte[] packet = bos.toByteArray();
+
+        reader.readFrom(new ByteArrayInputStream(packet));
+        ControlMessage event = reader.next();
+
+        Assert.assertEquals(ControlMessage.TYPE_SCAN_MEDIA, event.getType());
+        Assert.assertEquals("/sdcard/Download/", event.getText());
+    }
+
     @Test
     public void testMultiEvents() throws IOException {
         ControlMessageReader reader = new ControlMessageReader();