Report recorder errors

Stop scrcpy on recorder errors.

It was previously indirectly stopped by the demuxer, which failed to
push packets to a recorder in error. Report it directly instead:
 - it avoids to wait for the next demuxer call;
 - it will allow to open the target file from a separate thread and stop
   immediately on any I/O error.

app/src/events.h

@@ -4,3 +4,4 @@
 #define SC_EVENT_SERVER_CONNECTED         (SDL_USEREVENT + 3)
 #define SC_EVENT_USB_DEVICE_DISCONNECTED  (SDL_USEREVENT + 4)
 #define SC_EVENT_DEMUXER_ERROR            (SDL_USEREVENT + 5)
+#define SC_EVENT_RECORDER_ERROR           (SDL_USEREVENT + 6)

app/src/recorder.c

@@ -240,6 +240,9 @@ run_recorder(void *data) {
 
     LOGD("Recorder thread ended");
 
+    recorder->cbs->on_ended(recorder, !recorder->failed,
+                            recorder->cbs_userdata);
+
     return 0;
 }
 
@@ -387,10 +390,10 @@ sc_recorder_packet_sink_push(struct sc_packet_sink *sink,
 }
 
 bool
-sc_recorder_init(struct sc_recorder *recorder,
-                 const char *filename,
+sc_recorder_init(struct sc_recorder *recorder, const char *filename,
                  enum sc_record_format format,
-                 struct sc_size declared_frame_size) {
+                 struct sc_size declared_frame_size,
+                 const struct sc_recorder_callbacks *cbs, void *cbs_userdata) {
     recorder->filename = strdup(filename);
     if (!recorder->filename) {
         LOG_OOM();
@@ -400,6 +403,10 @@ sc_recorder_init(struct sc_recorder *recorder,
     recorder->format = format;
     recorder->declared_frame_size = declared_frame_size;
 
+    assert(cbs && cbs->on_ended);
+    recorder->cbs = cbs;
+    recorder->cbs_userdata = cbs_userdata;
+
     static const struct sc_packet_sink_ops ops = {
         .open = sc_recorder_packet_sink_open,
         .close = sc_recorder_packet_sink_close,

app/src/recorder.h

@@ -34,12 +34,21 @@ struct sc_recorder {
     bool stopped; // set on recorder_close()
     bool failed; // set on packet write failure
     struct sc_recorder_queue queue;
+
+    const struct sc_recorder_callbacks *cbs;
+    void *cbs_userdata;
+};
+
+struct sc_recorder_callbacks {
+    void (*on_ended)(struct sc_recorder *recorder, bool success,
+                     void *userdata);
 };
 
 bool
 sc_recorder_init(struct sc_recorder *recorder, const char *filename,
                  enum sc_record_format format,
-                 struct sc_size declared_frame_size);
+                 struct sc_size declared_frame_size,
+                 const struct sc_recorder_callbacks *cbs, void *cbs_userdata);
 
 void
 sc_recorder_destroy(struct sc_recorder *recorder);

app/src/scrcpy.c

@@ -161,6 +161,9 @@ event_loop(struct scrcpy *s) {
             case SC_EVENT_DEMUXER_ERROR:
                 LOGE("Demuxer error");
                 return SCRCPY_EXIT_FAILURE;
+            case SC_EVENT_RECORDER_ERROR:
+                LOGE("Recorder error");
+                return SCRCPY_EXIT_FAILURE;
             case SDL_QUIT:
                 LOGD("User requested to quit");
                 return SCRCPY_EXIT_SUCCESS;
@@ -198,6 +201,17 @@ await_for_server(bool *connected) {
     return false;
 }
 
+static void
+sc_recorder_on_ended(struct sc_recorder *recorder, bool success,
+                     void *userdata) {
+    (void) recorder;
+    (void) userdata;
+
+    if (!success) {
+        PUSH_EVENT(SC_EVENT_RECORDER_ERROR);
+    }
+}
+
 static void
 sc_demuxer_on_ended(struct sc_demuxer *demuxer, bool eos, void *userdata) {
     (void) demuxer;
@@ -379,10 +393,12 @@ scrcpy(struct scrcpy_options *options) {
 
     struct sc_recorder *rec = NULL;
     if (options->record_filename) {
-        if (!sc_recorder_init(&s->recorder,
-                              options->record_filename,
-                              options->record_format,
-                              info->frame_size)) {
+        static const struct sc_recorder_callbacks recorder_cbs = {
+            .on_ended = sc_recorder_on_ended,
+        };
+        if (!sc_recorder_init(&s->recorder, options->record_filename,
+                              options->record_format, info->frame_size,
+                              &recorder_cbs, NULL)) {
             goto end;
         }
         rec = &s->recorder;