Feature/mqtt screenshots

.devcontainer/docker/devcontainer-lock.json

@@ -0,0 +1,9 @@
+{
+  "features": {
+    "ghcr.io/devcontainers/features/node:1": {
+      "version": "1.7.1",
+      "resolved": "ghcr.io/devcontainers/features/node@sha256:8c0de46939b61958041700ee89e3493f3b2e4131a06dc46b4d9423427d06e5f6",
+      "integrity": "sha256:8c0de46939b61958041700ee89e3493f3b2e4131a06dc46b4d9423427d06e5f6"
+    }
+  }
+}

config.go

@@ -205,12 +205,15 @@ func getDefaultConfig() Config {
 		VideoQualityFactor:   1.0,
 		VideoCodecPreference: "auto",
 		MqttConfig: &MQTTConfig{
-			Enabled:           false,
-			Port:              1883,
-			BaseTopic:         "jetkvm",
-			EnableHADiscovery: false,
-			EnableActions:     true,
-			DebounceMs:        500,
+			Enabled:                 false,
+			Port:                    1883,
+			BaseTopic:               "jetkvm",
+			EnableHADiscovery:       false,
+			EnableActions:           true,
+			DebounceMs:              500,
+			PublishScreenshot:       false,
+			ScreenshotIntervalSec:   60,
+			PublishScreenshotButton: false,
 		},
 	}
 }

internal/native/cgo/ctrl.c

@@ -437,6 +437,10 @@ void jetkvm_video_shutdown() {
     video_shutdown();
 }
 
+int jetkvm_video_capture_jpeg(uint8_t **out_buf, size_t *out_len) {
+    return video_capture_jpeg(out_buf, out_len);
+}
+
 void jetkvm_crash() {
     // let's call a function that will crash the program
     int* p = 0;

internal/native/cgo/ctrl.h

@@ -71,6 +71,16 @@ void video_report_format(bool ready, const char *error, u_int16_t width, u_int16
 void video_send_format_report();
 int video_send_frame(const uint8_t *frame, ssize_t len);
 
+/**
+ * @brief Capture a single JPEG frame from the live video stream.
+ *
+ * On success, *out_buf is set to a malloc'd buffer containing JPEG bytes and
+ * *out_len to its length. The caller must free *out_buf with free().
+ *
+ * @return 0 on success, non-zero on error.
+ */
+int jetkvm_video_capture_jpeg(uint8_t **out_buf, size_t *out_len);
+
 
 
 #endif //VIDEO_DAEMON_CTRL_H