Merge 61ee27e931 into 2444817455

Co-authored-by: Adam Shiervani <adam.shiervani@gmail.com>
Co-authored-by: Adam Shiervani <adamshiervani@fastmail.com>

cloud.go

@@ -478,7 +478,7 @@ func handleSessionRequest(
 	cloudLogger.Trace().Interface("session", session).Msg("new session accepted")
 
 	// Cancel any ongoing keyboard macro when session changes
-	cancelKeyboardMacro()
+	cancelAllRunningKeyboardMacros()
 
 	currentSession = session
 	_ = wsjson.Write(context.Background(), c, gin.H{"type": "answer", "data": sd})

config.go

@@ -106,6 +106,7 @@ type Config struct {
 	NetworkConfig        *types.NetworkConfig `json:"network_config"`
 	DefaultLogLevel      string               `json:"default_log_level"`
 	VideoSleepAfterSec   int                  `json:"video_sleep_after_sec"`
+	VideoQualityFactor   float64              `json:"video_quality_factor"`
 }
 
 func (c *Config) GetDisplayRotation() uint16 {

hidrpc.go

@@ -26,20 +26,45 @@ func handleHidRPCMessage(message hidrpc.Message, session *Session) {
 			return
 		}
 		session.hidRPCAvailable = true
+
 	case hidrpc.TypeKeypressReport, hidrpc.TypeKeyboardReport:
 		rpcErr = handleHidRPCKeyboardInput(message)
+
 	case hidrpc.TypeKeyboardMacroReport:
 		keyboardMacroReport, err := message.KeyboardMacroReport()
 		if err != nil {
 			logger.Warn().Err(err).Msg("failed to get keyboard macro report")
 			return
 		}
-		rpcErr = rpcExecuteKeyboardMacro(keyboardMacroReport.Steps)
+		token := rpcExecuteKeyboardMacro(keyboardMacroReport.IsPaste, keyboardMacroReport.Steps)
+		logger.Debug().Str("token", token.String()).Msg("started keyboard macro")
+		message, err := hidrpc.NewKeyboardMacroTokenMessage(token).Marshal()
+
+		if err != nil {
+			logger.Warn().Err(err).Msg("failed to marshal running macro token message")
+			return
+		}
+		if err := session.HidChannel.Send(message); err != nil {
+			logger.Warn().Err(err).Msg("failed to send running macro token message")
+			return
+		}
+
 	case hidrpc.TypeCancelKeyboardMacroReport:
 		rpcCancelKeyboardMacro()
 		return
+
+	case hidrpc.TypeKeyboardMacroTokenState:
+		tokenState, err := message.KeyboardMacroTokenState()
+		if err != nil {
+			logger.Warn().Err(err).Msg("failed to get keyboard macro token")
+			return
+		}
+		rpcCancelKeyboardMacroByToken(tokenState.Token)
+		return
+
 	case hidrpc.TypeKeypressKeepAliveReport:
 		rpcErr = handleHidRPCKeypressKeepAlive(session)
+
 	case hidrpc.TypePointerReport:
 		pointerReport, err := message.PointerReport()
 		if err != nil {
@@ -47,6 +72,7 @@ func handleHidRPCMessage(message hidrpc.Message, session *Session) {
 			return
 		}
 		rpcErr = rpcAbsMouseReport(pointerReport.X, pointerReport.Y, pointerReport.Button)
+
 	case hidrpc.TypeMouseReport:
 		mouseReport, err := message.MouseReport()
 		if err != nil {
@@ -54,6 +80,7 @@ func handleHidRPCMessage(message hidrpc.Message, session *Session) {
 			return
 		}
 		rpcErr = rpcRelMouseReport(mouseReport.DX, mouseReport.DY, mouseReport.Button)
+
 	default:
 		logger.Warn().Uint8("type", uint8(message.Type())).Msg("unknown HID RPC message type")
 	}
@@ -65,15 +92,18 @@ func handleHidRPCMessage(message hidrpc.Message, session *Session) {
 
 func onHidMessage(msg hidQueueMessage, session *Session) {
 	data := msg.Data
+	dataLen := len(data)
 
 	scopedLogger := hidRPCLogger.With().
 		Str("channel", msg.channel).
-		Bytes("data", data).
+		Dur("timelimit", msg.timelimit).
+		Int("data_len", dataLen).
+		Bytes("data", data[:min(dataLen, 32)]).
 		Logger()
 	scopedLogger.Debug().Msg("HID RPC message received")
 
-	if len(data) < 1 {
-		scopedLogger.Warn().Int("length", len(data)).Msg("received empty data in HID RPC message handler")
+	if dataLen < 1 {
+		scopedLogger.Warn().Msg("received empty data in HID RPC message handler")
 		return
 	}
 
@@ -96,7 +126,7 @@ func onHidMessage(msg hidQueueMessage, session *Session) {
 		r <- nil
 	}()
 	select {
-	case <-time.After(1 * time.Second):
+	case <-time.After(msg.timelimit * time.Second):
 		scopedLogger.Warn().Msg("HID RPC message timed out")
 	case <-r:
 		scopedLogger.Debug().Dur("duration", time.Since(t)).Msg("HID RPC message handled")
@@ -212,6 +242,8 @@ func reportHidRPC(params any, session *Session) {
 		message, err = hidrpc.NewKeydownStateMessage(params).Marshal()
 	case hidrpc.KeyboardMacroState:
 		message, err = hidrpc.NewKeyboardMacroStateMessage(params.State, params.IsPaste).Marshal()
+	case hidrpc.KeyboardMacroTokenState:
+		message, err = hidrpc.NewKeyboardMacroTokenMessage(params.Token).Marshal()
 	default:
 		err = fmt.Errorf("unknown HID RPC message type: %T", params)
 	}

internal/hidrpc/hidrpc.go

@@ -2,7 +2,9 @@ package hidrpc
 
 import (
 	"fmt"
+	"time"
 
+	"github.com/google/uuid"
 	"github.com/jetkvm/kvm/internal/usbgadget"
 )
 
@@ -22,26 +24,34 @@ const (
 	TypeKeyboardLedState          MessageType = 0x32
 	TypeKeydownState              MessageType = 0x33
 	TypeKeyboardMacroState        MessageType = 0x34
+	TypeKeyboardMacroTokenState   MessageType = 0x35
 )
 
+type QueueIndex int
+
 const (
 	Version        byte = 0x01 // Version of the HID RPC protocol
+	HandshakeQueue int  = 0    // Queue index for handshake messages
+	KeyboardQueue  int  = 1    // Queue index for keyboard messages
+	MouseQueue     int  = 2    // Queue index for mouse messages
+	MacroQueue     int  = 3    // Queue index for macro messages
+	OtherQueue     int  = 4    // Queue index for other messages
 )
 
 // GetQueueIndex returns the index of the queue to which the message should be enqueued.
-func GetQueueIndex(messageType MessageType) int {
+func GetQueueIndex(messageType MessageType) (int, time.Duration) {
 	switch messageType {
 	case TypeHandshake:
-		return 0
-	case TypeKeyboardReport, TypeKeypressReport, TypeKeyboardMacroReport, TypeKeyboardLedState, TypeKeydownState, TypeKeyboardMacroState:
-		return 1
+		return HandshakeQueue, 1
+	case TypeKeyboardReport, TypeKeypressReport, TypeKeyboardLedState, TypeKeydownState, TypeKeyboardMacroState:
+		return KeyboardQueue, 1
 	case TypePointerReport, TypeMouseReport, TypeWheelReport:
-		return 2
-	// we don't want to block the queue for this message
-	case TypeCancelKeyboardMacroReport:
-		return 3
+		return MouseQueue, 1
+	// we don't want to block the queue for these messages
+	case TypeKeyboardMacroReport, TypeCancelKeyboardMacroReport, TypeKeyboardMacroTokenState:
+		return MacroQueue, 60 // 1 minute timeout
 	default:
-		return 3
+		return OtherQueue, 5
 	}
 }
 
@@ -121,3 +131,13 @@ func NewKeyboardMacroStateMessage(state bool, isPaste bool) *Message {
 		d: data,
 	}
 }
+
+// NewKeyboardMacroTokenMessage creates a new keyboard macro token message.
+func NewKeyboardMacroTokenMessage(token uuid.UUID) *Message {
+	data, _ := token.MarshalBinary()
+
+	return &Message{
+		t: TypeKeyboardMacroTokenState,
+		d: data,
+	}
+}

internal/hidrpc/message.go

@@ -3,6 +3,8 @@ package hidrpc
 import (
 	"encoding/binary"
 	"fmt"
+
+	"github.com/google/uuid"
 )
 
 // Message ..
@@ -23,6 +25,9 @@ func (m *Message) Type() MessageType {
 func (m *Message) String() string {
 	switch m.t {
 	case TypeHandshake:
+		if len(m.d) != 0 {
+			return fmt.Sprintf("Handshake{Malformed: %v}", m.d)
+		}
 		return "Handshake"
 	case TypeKeypressReport:
 		if len(m.d) < 2 {
@@ -45,12 +50,45 @@ func (m *Message) String() string {
 		}
 		return fmt.Sprintf("MouseReport{DX: %d, DY: %d, Button: %d}", m.d[0], m.d[1], m.d[2])
 	case TypeKeypressKeepAliveReport:
+		if len(m.d) != 0 {
+			return fmt.Sprintf("KeypressKeepAliveReport{Malformed: %v}", m.d)
+		}
 		return "KeypressKeepAliveReport"
+	case TypeWheelReport:
+		if len(m.d) < 3 {
+			return fmt.Sprintf("WheelReport{Malformed: %v}", m.d)
+		}
+		return fmt.Sprintf("WheelReport{Vertical: %d, Horizontal: %d}", int8(m.d[0]), int8(m.d[1]))
 	case TypeKeyboardMacroReport:
 		if len(m.d) < 5 {
 			return fmt.Sprintf("KeyboardMacroReport{Malformed: %v}", m.d)
 		}
 		return fmt.Sprintf("KeyboardMacroReport{IsPaste: %v, Length: %d}", m.d[0] == uint8(1), binary.BigEndian.Uint32(m.d[1:5]))
+	case TypeCancelKeyboardMacroReport:
+		if len(m.d) != 0 {
+			return fmt.Sprintf("CancelKeyboardMacroReport{Malformed: %v}", m.d)
+		}
+		return "CancelKeyboardMacroReport"
+	case TypeKeyboardMacroTokenState:
+		if len(m.d) != 16 {
+			return fmt.Sprintf("KeyboardMacroTokenState{Malformed: %v}", m.d)
+		}
+		return fmt.Sprintf("KeyboardMacroTokenState{Token: %s}", uuid.Must(uuid.FromBytes(m.d)).String())
+	case TypeKeyboardLedState:
+		if len(m.d) < 1 {
+			return fmt.Sprintf("KeyboardLedState{Malformed: %v}", m.d)
+		}
+		return fmt.Sprintf("KeyboardLedState{State: %d}", m.d[0])
+	case TypeKeydownState:
+		if len(m.d) < 1 {
+			return fmt.Sprintf("KeydownState{Malformed: %v}", m.d)
+		}
+		return fmt.Sprintf("KeydownState{State: %d}", m.d[0])
+	case TypeKeyboardMacroState:
+		if len(m.d) < 2 {
+			return fmt.Sprintf("KeyboardMacroState{Malformed: %v}", m.d)
+		}
+		return fmt.Sprintf("KeyboardMacroState{State: %v, IsPaste: %v}", m.d[0] == uint8(1), m.d[1] == uint8(1))
 	default:
 		return fmt.Sprintf("Unknown{Type: %d, Data: %v}", m.t, m.d)
 	}
@@ -67,7 +105,9 @@ func (m *Message) KeypressReport() (KeypressReport, error) {
 	if m.t != TypeKeypressReport {
 		return KeypressReport{}, fmt.Errorf("invalid message type: %d", m.t)
 	}
-
+	if len(m.d) < 2 {
+		return KeypressReport{}, fmt.Errorf("invalid message data length: %d", len(m.d))
+	}
 	return KeypressReport{
 		Key:   m.d[0],
 		Press: m.d[1] == uint8(1),
@@ -95,7 +135,7 @@ func (m *Message) KeyboardReport() (KeyboardReport, error) {
 // Macro ..
 type KeyboardMacroStep struct {
 	Modifier byte   // 1 byte
-	Keys     []byte // 6 bytes: hidKeyBufferSize
+	Keys     []byte // 6 bytes: HidKeyBufferSize
 	Delay    uint16 // 2 bytes
 }
 type KeyboardMacroReport struct {
@@ -105,7 +145,7 @@ type KeyboardMacroReport struct {
 }
 
 // HidKeyBufferSize is the size of the keys buffer in the keyboard report.
-const HidKeyBufferSize = 6
+const HidKeyBufferSize int = 6
 
 // KeyboardMacroReport returns the keyboard macro report from the message.
 func (m *Message) KeyboardMacroReport() (KeyboardMacroReport, error) {
@@ -205,3 +245,29 @@ func (m *Message) KeyboardMacroState() (KeyboardMacroState, error) {
 		IsPaste: m.d[1] == uint8(1),
 	}, nil
 }
+
+type KeyboardMacroTokenState struct {
+	Token uuid.UUID
+}
+
+// KeyboardMacroTokenState returns the keyboard macro token UUID from the message.
+func (m *Message) KeyboardMacroTokenState() (KeyboardMacroTokenState, error) {
+	if m.t != TypeKeyboardMacroTokenState {
+		return KeyboardMacroTokenState{}, fmt.Errorf("invalid message type: %d", m.t)
+	}
+
+	if len(m.d) == 0 {
+		return KeyboardMacroTokenState{Token: uuid.Nil}, nil
+	}
+
+	if len(m.d) != 16 {
+		return KeyboardMacroTokenState{}, fmt.Errorf("invalid UUID length: %d", len(m.d))
+	}
+
+	token, err := uuid.FromBytes(m.d)
+	if err != nil {
+		return KeyboardMacroTokenState{}, fmt.Errorf("invalid UUID: %v", err)
+	}
+
+	return KeyboardMacroTokenState{Token: token}, nil
+}

internal/native/cgo/ctrl.c

@@ -405,8 +405,8 @@ char *jetkvm_video_log_status() {
     return (char *)videoc_log_status();
 }
 
-int jetkvm_video_init() {
-    return video_init();
+int jetkvm_video_init(float factor) {
+    return video_init(factor);
 }
 
 void jetkvm_video_shutdown() {

internal/native/cgo/ctrl.h

@@ -52,7 +52,7 @@ const char *jetkvm_ui_get_lvgl_version();
 
 const char *jetkvm_ui_event_code_to_name(int code);
 
-int jetkvm_video_init();
+int jetkvm_video_init(float quality_factor);
 void jetkvm_video_shutdown();
 void jetkvm_video_start();
 void jetkvm_video_stop();

internal/native/cgo/video.c

@@ -29,6 +29,7 @@
 
 #define VIDEO_DEV "/dev/video0"
 #define SUB_DEV "/dev/v4l-subdev2"
+#define SLEEP_MODE_FILE "/sys/devices/platform/ff470000.i2c/i2c-4/4-000f/sleep_mode"
 
 #define RK_ALIGN(x, a) (((x) + (a)-1) & ~((a)-1))
 #define RK_ALIGN_2(x) RK_ALIGN(x, 2)
@@ -39,6 +40,7 @@ int sub_dev_fd = -1;
 #define VENC_CHANNEL 0
 MB_POOL memPool = MB_INVALID_POOLID;
 
+bool sleep_mode_available = false;
 bool should_exit = false;
 float quality_factor = 1.0f;
 
@@ -51,6 +53,45 @@ RK_U64 get_us()
     return (RK_U64)time.tv_sec * 1000000 + (RK_U64)time.tv_nsec / 1000; /* microseconds */
 }
 
+static void ensure_sleep_mode_disabled()
+{
+    if (!sleep_mode_available)
+    {
+        return;
+    }
+
+    int fd = open(SLEEP_MODE_FILE, O_RDWR);
+    if (fd < 0)
+    {
+        log_error("Failed to open sleep mode file: %s", strerror(errno));
+        return;
+    }
+    lseek(fd, 0, SEEK_SET);
+    char buffer[1];
+    read(fd, buffer, 1);
+    if (buffer[0] == '0') {
+        close(fd);
+        return;
+    }
+    log_warn("HDMI sleep mode is not disabled, disabling it");
+    lseek(fd, 0, SEEK_SET);
+    write(fd, "0", 1);
+    close(fd);
+
+    usleep(1000); // give some time to the system to disable the sleep mode
+    return;
+}
+
+static void detect_sleep_mode()
+{
+    if (access(SLEEP_MODE_FILE, F_OK) != 0) {
+        sleep_mode_available = false;
+        return;
+    }
+    sleep_mode_available = true;
+    ensure_sleep_mode_disabled();
+}
+
 double calculate_bitrate(float bitrate_factor, int width, int height)
 {
     const int32_t base_bitrate_high = 2000;
@@ -190,8 +231,15 @@ static int32_t buf_init()
 
 pthread_t *format_thread = NULL;
 
-int video_init()
+int video_init(float factor)
 {
+    detect_sleep_mode();
+
+    if (factor < 0 || factor > 1) {
+        factor = 1.0f;
+    }
+    quality_factor = factor;
+
     if (RK_MPI_SYS_Init() != RK_SUCCESS)
     {
         log_error("RK_MPI_SYS_Init failed");
@@ -301,11 +349,29 @@ static void *venc_read_stream(void *arg)
 }
 
 uint32_t detected_width, detected_height;
-bool detected_signal = false, streaming_flag = false;
+bool detected_signal = false, streaming_flag = false, streaming_stopped = true;
 
 pthread_t *streaming_thread = NULL;
 pthread_mutex_t streaming_mutex = PTHREAD_MUTEX_INITIALIZER;
 
+bool get_streaming_flag()
+{
+    log_info("getting streaming flag");
+    pthread_mutex_lock(&streaming_mutex);
+    bool flag = streaming_flag;
+    pthread_mutex_unlock(&streaming_mutex);
+    return flag;
+}
+
+void set_streaming_flag(bool flag)
+{
+    log_info("setting streaming flag to %d", flag);
+
+    pthread_mutex_lock(&streaming_mutex);
+    streaming_flag = flag;
+    pthread_mutex_unlock(&streaming_mutex);
+}
+
 void write_buffer_to_file(const uint8_t *buffer, size_t length, const char *filename)
 {
     FILE *file = fopen(filename, "wb");
@@ -319,6 +385,8 @@ void *run_video_stream(void *arg)
 
     log_info("running video stream");
 
+    streaming_stopped = false;
+
     while (streaming_flag)
     {
         if (detected_signal == false)
@@ -401,7 +469,7 @@ void *run_video_stream(void *arg)
             {
                 log_error("get mb blk failed!");
                 close(video_dev_fd);
-                return ;
+                return (void *)errno;
             }
             log_info("Got memory block for buffer %d", i);
 
@@ -538,6 +606,18 @@ void *run_video_stream(void *arg)
             log_error("VIDIOC_STREAMOFF failed: %s", strerror(errno));
         }
 
+        // Explicitly free V4L2 buffer queue
+        struct v4l2_requestbuffers req_free;
+        memset(&req_free, 0, sizeof(req_free));
+        req_free.count = 0;
+        req_free.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+        req_free.memory = V4L2_MEMORY_DMABUF;
+
+        if (ioctl(video_dev_fd, VIDIOC_REQBUFS, &req_free) < 0)
+        {
+            log_error("Failed to free V4L2 buffers: %s", strerror(errno));
+        }
+
         venc_stop();
 
         for (int i = 0; i < input_buffer_count; i++)
@@ -553,6 +633,9 @@ void *run_video_stream(void *arg)
     }
 
     log_info("video stream thread exiting");
+
+    streaming_stopped = true;
+
     return NULL;
 }
 
@@ -582,56 +665,75 @@ void video_shutdown()
     log_info("Destroyed streaming mutex");
 }
 
-
 void video_start_streaming()
 {
-    pthread_mutex_lock(&streaming_mutex);
+    log_info("starting video streaming");
     if (streaming_thread != NULL)
     {
+        if (streaming_stopped == true) {
+            log_error("video streaming already stopped but streaming_thread is not NULL");
+            assert(streaming_stopped == true);
+        }
         log_warn("video streaming already started");
-        goto cleanup;
+        return;
     }
 
     pthread_t *new_thread = malloc(sizeof(pthread_t));
     if (new_thread == NULL)
     {
         log_error("Failed to allocate memory for streaming thread");
-        goto cleanup;
+        return;
     }
 
-    streaming_flag = true;
+    set_streaming_flag(true);
     int result = pthread_create(new_thread, NULL, run_video_stream, NULL);
     if (result != 0)
     {
         log_error("Failed to create streaming thread: %s", strerror(result));
-        streaming_flag = false;
+        set_streaming_flag(false);
         free(new_thread);
-        goto cleanup;
+        return;
     }
 
-    // Only set streaming_thread after successful creation, and before unlocking the mutex
+    // Only set streaming_thread after successful creation
     streaming_thread = new_thread;
-cleanup:
-    pthread_mutex_unlock(&streaming_mutex);
-    return;
 }
 
 void video_stop_streaming()
 {
-    pthread_mutex_lock(&streaming_mutex);
-    if (streaming_thread != NULL)
-    {
-        streaming_flag = false;
+    if (streaming_thread == NULL) {
+        log_info("video streaming already stopped");
+        return;
+    }
+
     log_info("stopping video streaming");
-        // wait 100ms for the thread to exit
-        usleep(1000000);
+    set_streaming_flag(false);
+
     log_info("waiting for video streaming thread to exit");
+    int attempts = 0;
+    while (!streaming_stopped && attempts < 30) {
+        usleep(100000); // 100ms
+        attempts++;
+    }
+    if (!streaming_stopped) {
+        log_error("video streaming thread did not exit after 30s");
+    }
+
     pthread_join(*streaming_thread, NULL);
     free(streaming_thread);
     streaming_thread = NULL;
+
     log_info("video streaming stopped");
+}
+
+void video_restart_streaming()
+{
+    if (get_streaming_flag() == true)
+    {
+        log_info("restarting video streaming");
+        video_stop_streaming();
     }
-    pthread_mutex_unlock(&streaming_mutex);
+    video_start_streaming();
 }
 
 void *run_detect_format(void *arg)
@@ -650,6 +752,8 @@ void *run_detect_format(void *arg)
 
     while (!should_exit)
     {
+        ensure_sleep_mode_disabled();
+
         memset(&dv_timings, 0, sizeof(dv_timings));
         if (ioctl(sub_dev_fd, VIDIOC_QUERY_DV_TIMINGS, &dv_timings) != 0)
         {
@@ -689,21 +793,17 @@ void *run_detect_format(void *arg)
                                         (dv_timings.bt.width + dv_timings.bt.hfrontporch + dv_timings.bt.hsync +
                                          dv_timings.bt.hbackporch));
             log_info("Frames per second: %.2f fps", frames_per_second);
+
+            bool should_restart = dv_timings.bt.width != detected_width || dv_timings.bt.height != detected_height || !detected_signal;
+
             detected_width = dv_timings.bt.width;
             detected_height = dv_timings.bt.height;
             detected_signal = true;
             video_report_format(true, NULL, detected_width, detected_height, frames_per_second);
-            pthread_mutex_lock(&streaming_mutex);
-            if (streaming_flag == true)
-            {
-                pthread_mutex_unlock(&streaming_mutex);
-                log_info("restarting on going video streaming");
-                video_stop_streaming();
-                video_start_streaming();
-            }
-            else
-            {
-                pthread_mutex_unlock(&streaming_mutex);
+
+            if (should_restart) {
+                log_info("restarting video streaming due to format change");
+                video_restart_streaming();
             }
         }
 
@@ -731,19 +831,7 @@ void video_set_quality_factor(float factor)
     quality_factor = factor;
 
     // TODO: update venc bitrate without stopping streaming
-
-    pthread_mutex_lock(&streaming_mutex);
-    if (streaming_flag == true)
-    {
-        pthread_mutex_unlock(&streaming_mutex);
-        log_info("restarting on going video streaming due to quality factor change");
-        video_stop_streaming();
-        video_start_streaming();
-    }
-    else
-    {
-        pthread_mutex_unlock(&streaming_mutex);
-    }
+    video_restart_streaming();
 }
 
 float video_get_quality_factor() {

internal/native/cgo/video.h

@@ -6,7 +6,7 @@
  *
  * @return int 0 on success, -1 on failure
  */
-int video_init();
+int video_init(float quality_factor);
 
 /**
  * @brief Shutdown the video subsystem

internal/native/cgo_linux.go

@@ -129,11 +129,13 @@ func uiTick() {
 	C.jetkvm_ui_tick()
 }
 
-func videoInit() error {
+func videoInit(factor float64) error {
 	cgoLock.Lock()
 	defer cgoLock.Unlock()
 
-	ret := C.jetkvm_video_init()
+	factorC := C.float(factor)
+
+	ret := C.jetkvm_video_init(factorC)
 	if ret != 0 {
 		return fmt.Errorf("failed to initialize video: %d", ret)
 	}

internal/native/native.go

@@ -15,6 +15,7 @@ type Native struct {
 	systemVersion        *semver.Version
 	appVersion           *semver.Version
 	displayRotation      uint16
+	defaultQualityFactor float64
 	onVideoStateChange   func(state VideoState)
 	onVideoFrameReceived func(frame []byte, duration time.Duration)
 	onIndevEvent         func(event string)
@@ -22,12 +23,14 @@ type Native struct {
 	sleepModeSupported   bool
 	videoLock            sync.Mutex
 	screenLock           sync.Mutex
+	extraLock            sync.Mutex
 }
 
 type NativeOptions struct {
 	SystemVersion        *semver.Version
 	AppVersion           *semver.Version
 	DisplayRotation      uint16
+	DefaultQualityFactor float64
 	OnVideoStateChange   func(state VideoState)
 	OnVideoFrameReceived func(frame []byte, duration time.Duration)
 	OnIndevEvent         func(event string)
@@ -65,6 +68,11 @@ func NewNative(opts NativeOptions) *Native {
 
 	sleepModeSupported := isSleepModeSupported()
 
+	defaultQualityFactor := opts.DefaultQualityFactor
+	if defaultQualityFactor < 0 || defaultQualityFactor > 1 {
+		defaultQualityFactor = 1.0
+	}
+
 	return &Native{
 		ready:                make(chan struct{}),
 		l:                    nativeLogger,
@@ -72,6 +80,7 @@ func NewNative(opts NativeOptions) *Native {
 		systemVersion:        opts.SystemVersion,
 		appVersion:           opts.AppVersion,
 		displayRotation:      opts.DisplayRotation,
+		defaultQualityFactor: defaultQualityFactor,
 		onVideoStateChange:   onVideoStateChange,
 		onVideoFrameReceived: onVideoFrameReceived,
 		onIndevEvent:         onIndevEvent,
@@ -97,7 +106,7 @@ func (n *Native) Start() {
 	n.initUI()
 	go n.tickUI()
 
-	if err := videoInit(); err != nil {
+	if err := videoInit(n.defaultQualityFactor); err != nil {
 		n.l.Error().Err(err).Msg("failed to initialize video")
 	}
 

internal/native/video.go

@@ -1,11 +1,18 @@
 package native
 
 import (
+	"fmt"
 	"os"
+	"time"
 )
 
 const sleepModeFile = "/sys/devices/platform/ff470000.i2c/i2c-4/4-000f/sleep_mode"
 
+// DefaultEDID is the default EDID for the video stream.
+const DefaultEDID = "00ffffffffffff0052620188008888881c150103800000780a0dc9a05747982712484c00000001010101010101010101010101010101023a801871382d40582c4500c48e2100001e011d007251d01e206e285500c48e2100001e000000fc00543734392d6648443732300a20000000fd00147801ff1d000a202020202020017b"
+
+var extraLockTimeout = 5 * time.Second
+
 // VideoState is the state of the video stream.
 type VideoState struct {
 	Ready          bool    `json:"ready"`
@@ -66,12 +73,32 @@ func (n *Native) VideoSleepModeSupported() bool {
 	return n.sleepModeSupported
 }
 
+// useExtraLock uses the extra lock to execute a function.
+// if the lock is currently held by another goroutine, returns an error.
+//
+// it's used to ensure that only one change is made to the video stream at a time.
+// as the change usually requires to restart video streaming
+// TODO: check video streaming status instead of using a hardcoded timeout
+func (n *Native) useExtraLock(fn func() error) error {
+	if !n.extraLock.TryLock() {
+		return fmt.Errorf("the previous change hasn't been completed yet")
+	}
+	err := fn()
+	if err == nil {
+		time.Sleep(extraLockTimeout)
+	}
+	n.extraLock.Unlock()
+	return err
+}
+
 // VideoSetQualityFactor sets the quality factor for the video stream.
 func (n *Native) VideoSetQualityFactor(factor float64) error {
 	n.videoLock.Lock()
 	defer n.videoLock.Unlock()
 
+	return n.useExtraLock(func() error {
 		return videoSetStreamQualityFactor(factor)
+	})
 }
 
 // VideoGetQualityFactor gets the quality factor for the video stream.
@@ -87,7 +114,13 @@ func (n *Native) VideoSetEDID(edid string) error {
 	n.videoLock.Lock()
 	defer n.videoLock.Unlock()
 
+	if edid == "" {
+		edid = DefaultEDID
+	}
+
+	return n.useExtraLock(func() error {
 		return videoSetEDID(edid)
+	})
 }
 
 // VideoGetEDID gets the EDID for the video stream.

internal/usbgadget/hid_keyboard.go

@@ -31,6 +31,8 @@ var keyboardReportDesc = []byte{
 	0x05, 0x01, /* USAGE_PAGE (Generic Desktop)	          */
 	0x09, 0x06, /* USAGE (Keyboard)                       */
 	0xa1, 0x01, /* COLLECTION (Application)               */
+
+	/* 8 modifier bits */
 	0x05, 0x07, /*   USAGE_PAGE (Keyboard)                */
 	0x19, 0xe0, /*   USAGE_MINIMUM (Keyboard LeftControl) */
 	0x29, 0xe7, /*   USAGE_MAXIMUM (Keyboard Right GUI)   */
@@ -39,27 +41,47 @@ var keyboardReportDesc = []byte{
 	0x75, 0x01, /*   REPORT_SIZE (1)                      */
 	0x95, 0x08, /*   REPORT_COUNT (8)                     */
 	0x81, 0x02, /*   INPUT (Data,Var,Abs)                 */
+
+	/* 8 bits of padding */
 	0x95, 0x01, /*   REPORT_COUNT (1)                     */
 	0x75, 0x08, /*   REPORT_SIZE (8)                      */
 	0x81, 0x03, /*   INPUT (Cnst,Var,Abs)                 */
+
+	/* 6 key codes for the 104 key keyboard */
+	0x95, 0x06, /*   REPORT_COUNT (6)                     */
+	0x75, 0x08, /*   REPORT_SIZE (8)                      */
+	0x15, 0x00, /*   LOGICAL_MINIMUM (0)                  */
+	0x25, 0xE7, /*   LOGICAL_MAXIMUM (104-key HID)        */
+	0x05, 0x07, /*   USAGE_PAGE (Keyboard)                */
+	0x19, 0x00, /*   USAGE_MINIMUM (Reserved)             */
+	0x29, 0xE7, /*   USAGE_MAXIMUM (Keyboard Right GUI)   */
+	0x81, 0x00, /*   INPUT (Data,Ary,Abs)                 */
+
+	/* LED report 5 bits for Num Lock through Kana */
 	0x95, 0x05, /*   REPORT_COUNT (5)                     */
 	0x75, 0x01, /*   REPORT_SIZE (1)                      */
-
 	0x05, 0x08, /*   USAGE_PAGE (LEDs)                    */
 	0x19, 0x01, /*   USAGE_MINIMUM (Num Lock)             */
 	0x29, 0x05, /*   USAGE_MAXIMUM (Kana)                 */
 	0x91, 0x02, /*   OUTPUT (Data,Var,Abs)                */
+
+	/* 1 bit of padding for the Power LED (ignored) */
+	0x95, 0x01, /*   REPORT_COUNT (1)                     */
+	0x75, 0x03, /*   REPORT_SIZE (3)                      */
+	0x91, 0x03, /*   OUTPUT (Cnst,Var,Abs)                */
+
+	/* LED report 1 bit for Shift */
+	0x95, 0x01, /*   REPORT_COUNT (1)                     */
+	0x75, 0x01, /*   REPORT_SIZE (1)                      */
+	0x05, 0x08, /*   USAGE_PAGE (LEDs)                    */
+	0x19, 0x07, /*   USAGE_MINIMUM (Shift)                */
+	0x29, 0x07, /*   USAGE_MAXIMUM (Shift)                */
+	0x91, 0x02, /*   OUTPUT (Data,Var,Abs)                */
+
+	/* 1 bit of padding for the rest of the byte */
 	0x95, 0x01, /*   REPORT_COUNT (1)                     */
 	0x75, 0x03, /*   REPORT_SIZE (3)                      */
 	0x91, 0x03, /*   OUTPUT (Cnst,Var,Abs)                */
-	0x95, 0x06, /*   REPORT_COUNT (6)                     */
-	0x75, 0x08, /*   REPORT_SIZE (8)                      */
-	0x15, 0x00, /*   LOGICAL_MINIMUM (0)                  */
-	0x25, 0x65, /*   LOGICAL_MAXIMUM (101)                */
-	0x05, 0x07, /*   USAGE_PAGE (Keyboard)                */
-	0x19, 0x00, /*   USAGE_MINIMUM (Reserved)             */
-	0x29, 0x65, /*   USAGE_MAXIMUM (Keyboard Application) */
-	0x81, 0x00, /*   INPUT (Data,Ary,Abs)                 */
 	0xc0, /* END_COLLECTION                         */
 }
 
@@ -153,6 +175,16 @@ func (u *UsbGadget) SetOnKeysDownChange(f func(state KeysDownState)) {
 	u.onKeysDownChange = &f
 }
 
+var suspendedKeyDownMessages bool = false
+
+func (u *UsbGadget) SuspendKeyDownMessages() {
+	suspendedKeyDownMessages = true
+}
+
+func (u *UsbGadget) ResumeSuspendKeyDownMessages() {
+	suspendedKeyDownMessages = false
+}
+
 func (u *UsbGadget) SetOnKeepAliveReset(f func()) {
 	u.onKeepAliveReset = &f
 }
@@ -169,9 +201,9 @@ func (u *UsbGadget) scheduleAutoRelease(key byte) {
 	}
 
 	// TODO: make this configurable
-	// We currently hardcode the duration to 100ms
+	// We currently hardcode the duration to the default of 100ms
 	// However, it should be the same as the duration of the keep-alive reset called baseExtension.
-	u.kbdAutoReleaseTimers[key] = time.AfterFunc(100*time.Millisecond, func() {
+	u.kbdAutoReleaseTimers[key] = time.AfterFunc(DefaultAutoReleaseDuration, func() {
 		u.performAutoRelease(key)
 	})
 }
@@ -314,6 +346,7 @@ var keyboardWriteHidFileLock sync.Mutex
 func (u *UsbGadget) keyboardWriteHidFile(modifier byte, keys []byte) error {
 	keyboardWriteHidFileLock.Lock()
 	defer keyboardWriteHidFileLock.Unlock()
+
 	if err := u.openKeyboardHidFile(); err != nil {
 		return err
 	}
@@ -353,7 +386,7 @@ func (u *UsbGadget) UpdateKeysDown(modifier byte, keys []byte) KeysDownState {
 	u.keysDownState = state
 	u.keyboardStateLock.Unlock()
 
-	if u.onKeysDownChange != nil {
+	if u.onKeysDownChange != nil && !suspendedKeyDownMessages {
 		(*u.onKeysDownChange)(state) // this enques to the outgoing hidrpc queue via usb.go → currentSession.enqueueKeysDownState(...)
 	}
 	return state
@@ -484,6 +517,10 @@ func (u *UsbGadget) keypressReport(key byte, press bool) (KeysDownState, error)
 	}
 
 	err := u.keyboardWriteHidFile(modifier, keys)
+	if err != nil {
+		u.log.Warn().Uint8("modifier", modifier).Uints8("keys", keys).Msg("Could not write keyboard report to hidg0")
+	}
+
 	return u.UpdateKeysDown(modifier, keys), err
 }
 

jsonrpc.go

@@ -1,7 +1,6 @@
 package kvm
 
 import (
-	"bytes"
 	"context"
 	"encoding/json"
 	"errors"
@@ -14,6 +13,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/google/uuid"
 	"github.com/pion/webrtc/v4"
 	"github.com/rs/zerolog"
 	"go.bug.st/serial"
@@ -243,7 +243,6 @@ func rpcGetEDID() (string, error) {
 func rpcSetEDID(edid string) error {
 	if edid == "" {
 		logger.Info().Msg("Restoring EDID to default")
-		edid = "00ffffffffffff0052620188008888881c150103800000780a0dc9a05747982712484c00000001010101010101010101010101010101023a801871382d40582c4500c48e2100001e011d007251d01e206e285500c48e2100001e000000fc00543734392d6648443732300a20000000fd00147801ff1d000a202020202020017b"
 	} else {
 		logger.Info().Str("edid", edid).Msg("Setting EDID")
 	}
@@ -1089,91 +1088,154 @@ func rpcSetLocalLoopbackOnly(enabled bool) error {
 	return nil
 }
 
+type RunningMacro struct {
+	cancel  context.CancelFunc
+	isPaste bool
+}
+
 var (
-	keyboardMacroCancel context.CancelFunc
+	keyboardMacroCancelMap map[uuid.UUID]RunningMacro
 	keyboardMacroLock      sync.Mutex
+	keyboardMacroOnce      sync.Once
 )
 
-// cancelKeyboardMacro cancels any ongoing keyboard macro execution
-func cancelKeyboardMacro() {
+func getKeyboardMacroCancelMap() map[uuid.UUID]RunningMacro {
+	keyboardMacroOnce.Do(func() {
+		keyboardMacroCancelMap = make(map[uuid.UUID]RunningMacro)
+	})
+	return keyboardMacroCancelMap
+}
+
+func addKeyboardMacro(isPaste bool, cancel context.CancelFunc) uuid.UUID {
 	keyboardMacroLock.Lock()
 	defer keyboardMacroLock.Unlock()
+	cancelMap := getKeyboardMacroCancelMap()
 
-	if keyboardMacroCancel != nil {
-		keyboardMacroCancel()
-		logger.Info().Msg("canceled keyboard macro")
-		keyboardMacroCancel = nil
+	token := uuid.New() // Generate a unique token
+	cancelMap[token] = RunningMacro{
+		isPaste: isPaste,
+		cancel:  cancel,
+	}
+	return token
+}
+
+func removeRunningKeyboardMacro(token uuid.UUID) {
+	keyboardMacroLock.Lock()
+	defer keyboardMacroLock.Unlock()
+	cancelMap := getKeyboardMacroCancelMap()
+
+	delete(cancelMap, token)
+}
+
+func cancelRunningKeyboardMacro(token uuid.UUID) {
+	keyboardMacroLock.Lock()
+	defer keyboardMacroLock.Unlock()
+	cancelMap := getKeyboardMacroCancelMap()
+
+	if runningMacro, exists := cancelMap[token]; exists {
+		runningMacro.cancel()
+		delete(cancelMap, token)
+		logger.Info().Interface("token", token).Msg("canceled keyboard macro by token")
+	} else {
+		logger.Debug().Interface("token", token).Msg("no running keyboard macro found for token")
 	}
 }
 
-func setKeyboardMacroCancel(cancel context.CancelFunc) {
+func cancelAllRunningKeyboardMacros() {
 	keyboardMacroLock.Lock()
 	defer keyboardMacroLock.Unlock()
+	cancelMap := getKeyboardMacroCancelMap()
 
-	keyboardMacroCancel = cancel
+	for token, runningMacro := range cancelMap {
+		runningMacro.cancel()
+		delete(cancelMap, token)
+		logger.Info().Interface("token", token).Msg("cancelled keyboard macro")
+	}
 }
 
-func rpcExecuteKeyboardMacro(macro []hidrpc.KeyboardMacroStep) error {
-	cancelKeyboardMacro()
+func reportRunningMacrosState() {
+	if currentSession != nil {
+		keyboardMacroLock.Lock()
+		defer keyboardMacroLock.Unlock()
+		cancelMap := getKeyboardMacroCancelMap()
 
+		isPaste := false
+		for _, runningMacro := range cancelMap {
+			if runningMacro.isPaste {
+				isPaste = true
+				break
+			}
+		}
+
+		state := hidrpc.KeyboardMacroState{
+			State:   len(cancelMap) > 0,
+			IsPaste: isPaste,
+		}
+
+		currentSession.reportHidRPCKeyboardMacroState(state)
+	}
+}
+
+func rpcExecuteKeyboardMacro(isPaste bool, macro []hidrpc.KeyboardMacroStep) uuid.UUID {
 	ctx, cancel := context.WithCancel(context.Background())
-	setKeyboardMacroCancel(cancel)
+	token := addKeyboardMacro(isPaste, cancel)
+	reportRunningMacrosState()
 
-	s := hidrpc.KeyboardMacroState{
-		State:   true,
-		IsPaste: true,
+	go func() {
+		defer reportRunningMacrosState()        // this executes last, so the map is already updated
+		defer removeRunningKeyboardMacro(token) // this executes first, to update the map
+
+		err := executeKeyboardMacro(ctx, isPaste, macro)
+		if err != nil {
+			logger.Error().Err(err).Interface("token", token).Bool("isPaste", isPaste).Msg("keyboard macro execution failed")
 		}
+	}()
 
-	if currentSession != nil {
-		currentSession.reportHidRPCKeyboardMacroState(s)
-	}
-
-	err := rpcDoExecuteKeyboardMacro(ctx, macro)
-
-	setKeyboardMacroCancel(nil)
-
-	s.State = false
-	if currentSession != nil {
-		currentSession.reportHidRPCKeyboardMacroState(s)
-	}
-
-	return err
+	return token
 }
 
 func rpcCancelKeyboardMacro() {
-	cancelKeyboardMacro()
+	defer reportRunningMacrosState()
+	cancelAllRunningKeyboardMacros()
 }
 
-var keyboardClearStateKeys = make([]byte, hidrpc.HidKeyBufferSize)
+func rpcCancelKeyboardMacroByToken(token uuid.UUID) {
+	defer reportRunningMacrosState()
 
-func isClearKeyStep(step hidrpc.KeyboardMacroStep) bool {
-	return step.Modifier == 0 && bytes.Equal(step.Keys, keyboardClearStateKeys)
+	if token == uuid.Nil {
+		cancelAllRunningKeyboardMacros()
+	} else {
+		cancelRunningKeyboardMacro(token)
+	}
 }
 
-func rpcDoExecuteKeyboardMacro(ctx context.Context, macro []hidrpc.KeyboardMacroStep) error {
-	logger.Debug().Interface("macro", macro).Msg("Executing keyboard macro")
+func executeKeyboardMacro(ctx context.Context, isPaste bool, macro []hidrpc.KeyboardMacroStep) error {
+	logger.Debug().
+		Int("macro_steps", len(macro)).
+		Bool("isPaste", isPaste).
+		Msg("Executing keyboard macro")
+
+	// don't report keyboard state changes while executing the macro
+	gadget.SuspendKeyDownMessages()
+	defer gadget.ResumeSuspendKeyDownMessages()
 
 	for i, step := range macro {
 		delay := time.Duration(step.Delay) * time.Millisecond
 
 		err := rpcKeyboardReport(step.Modifier, step.Keys)
 		if err != nil {
-			logger.Warn().Err(err).Msg("failed to execute keyboard macro")
+			logger.Warn().Err(err).Int("step", i).Msg("failed to execute keyboard macro")
 			return err
 		}
 
-		// notify the device that the keyboard state is being cleared
-		if isClearKeyStep(step) {
-			gadget.UpdateKeysDown(0, keyboardClearStateKeys)
-		}
-
 		// Use context-aware sleep that can be cancelled
 		select {
 		case <-time.After(delay):
 			// Sleep completed normally
 		case <-ctx.Done():
-			// make sure keyboard state is reset
-			err := rpcKeyboardReport(0, keyboardClearStateKeys)
+			// make sure keyboard state is reset and the client gets notified
+			gadget.ResumeSuspendKeyDownMessages()
+			err := rpcKeyboardReport(0, make([]byte, hidrpc.HidKeyBufferSize))
 			if err != nil {
 				logger.Warn().Err(err).Msg("failed to reset keyboard state")
 			}

native.go

@@ -20,6 +20,7 @@ func initNative(systemVersion *semver.Version, appVersion *semver.Version) {
 		SystemVersion:        systemVersion,
 		AppVersion:           appVersion,
 		DisplayRotation:      config.GetDisplayRotation(),
+		DefaultQualityFactor: config.VideoQualityFactor,
 		OnVideoStateChange: func(state native.VideoState) {
 			lastVideoState = state
 			triggerVideoStateUpdate()
@@ -58,7 +59,13 @@ func initNative(systemVersion *semver.Version, appVersion *semver.Version) {
 			}
 		},
 	})
+
 	nativeInstance.Start()
+	go func() {
+		if err := nativeInstance.VideoSetEDID(config.EdidString); err != nil {
+			nativeLogger.Warn().Err(err).Msg("error setting EDID")
+		}
+	}()
 
 	if os.Getenv("JETKVM_CRASH_TESTING") == "1" {
 		nativeInstance.DoNotUseThisIsForCrashTestingOnly()

ui/package-lock.json

@@ -38,6 +38,7 @@
         "recharts": "^3.2.1",
         "tailwind-merge": "^3.3.1",
         "usehooks-ts": "^3.1.1",
+        "uuid": "^13.0.0",
         "validator": "^13.15.15",
         "zustand": "^4.5.2"
       },
@@ -6907,6 +6908,19 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/uuid": {
+      "version": "13.0.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-13.0.0.tgz",
+      "integrity": "sha512-XQegIaBTVUjSHliKqcnFqYypAd4S+WCYt5NIeRs6w/UAry7z8Y9j5ZwRRL4kzq9U3sD6v+85er9FvkEaBpji2w==",
+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist-node/bin/uuid"
+      }
+    },
     "node_modules/validator": {
       "version": "13.15.15",
       "resolved": "https://registry.npmjs.org/validator/-/validator-13.15.15.tgz",

ui/package.json

@@ -49,6 +49,7 @@
     "recharts": "^3.2.1",
     "tailwind-merge": "^3.3.1",
     "usehooks-ts": "^3.1.1",
+    "uuid": "^13.0.0",
     "validator": "^13.15.15",
     "zustand": "^4.5.2"
   },

ui/src/components/popovers/PasteModal.tsx

@@ -188,18 +188,18 @@ export default function PasteModal() {
                     type="number"
                     label="Delay between keys"
                     placeholder="Delay between keys"
-                    min={50}
+                    min={0}
                     max={65534}
                     value={delayValue}
                     onChange={e => {
                       setDelayValue(parseInt(e.target.value, 10));
                     }}
                   />
-                  {delayValue < 50 || delayValue > 65534 && (
+                  {(delayValue < defaultDelay || delayValue > 65534) && (
                     <div className="mt-2 flex items-center gap-x-2">
                       <ExclamationCircleIcon className="h-4 w-4 text-red-500 dark:text-red-400" />
                       <span className="text-xs text-red-500 dark:text-red-400">
-                        Delay must be between 50 and 65534
+                        Delay should be between 20 and 65534
                       </span>
                     </div>
                   )}

ui/src/hooks/hidRpc.ts

@@ -1,3 +1,5 @@
+import { parse as uuidParse , stringify as uuidStringify } from "uuid";
+
 import { hidKeyBufferSize, KeyboardLedState, KeysDownState } from "./stores";
 
 export const HID_RPC_MESSAGE_TYPES = {
@@ -13,6 +15,7 @@ export const HID_RPC_MESSAGE_TYPES = {
     KeyboardLedState: 0x32,
     KeysDownState: 0x33,
     KeyboardMacroState: 0x34,
+    CancelKeyboardMacroByTokenReport: 0x35,
 }
 
 export type HidRpcMessageType = typeof HID_RPC_MESSAGE_TYPES[keyof typeof HID_RPC_MESSAGE_TYPES];
@@ -299,7 +302,7 @@ export class KeyboardMacroStateMessage extends RpcMessage {
     }
 
     public static unmarshal(data: Uint8Array): KeyboardMacroStateMessage | undefined {
-        if (data.length < 1) {
+        if (data.length < 2) {
             throw new Error(`Invalid keyboard macro state report message length: ${data.length}`);
         }
 
@@ -378,13 +381,30 @@ export class PointerReportMessage extends RpcMessage {
 }
 
 export class CancelKeyboardMacroReportMessage extends RpcMessage {
+    token: string;
 
-    constructor() {
+    constructor(token: string) {
         super(HID_RPC_MESSAGE_TYPES.CancelKeyboardMacroReport);
+        this.token = (token == null || token === undefined || token === "")
+            ? "00000000-0000-0000-0000-000000000000"
+            : token;
     }
 
     marshal(): Uint8Array {
-        return new Uint8Array([this.messageType]);
+        const tokenBytes = uuidParse(this.token);
+        return new Uint8Array([this.messageType, ...tokenBytes]);
+    }
+
+    public static unmarshal(data: Uint8Array): CancelKeyboardMacroReportMessage | undefined {
+        if (data.length == 0) {
+            return new CancelKeyboardMacroReportMessage("00000000-0000-0000-0000-000000000000");
+        }
+
+        if (data.length != 16) {
+            throw new Error(`Invalid cancel message length: ${data.length}`);
+        }
+
+        return new CancelKeyboardMacroReportMessage(uuidStringify(data.slice(0, 16)));
     }
 }
 
@@ -430,6 +450,7 @@ export const messageRegistry = {
     [HID_RPC_MESSAGE_TYPES.CancelKeyboardMacroReport]: CancelKeyboardMacroReportMessage,
     [HID_RPC_MESSAGE_TYPES.KeyboardMacroState]: KeyboardMacroStateMessage,
     [HID_RPC_MESSAGE_TYPES.KeypressKeepAliveReport]: KeypressKeepAliveMessage,
+    [HID_RPC_MESSAGE_TYPES.CancelKeyboardMacroByTokenReport]: CancelKeyboardMacroReportMessage,
 }
 
 export const unmarshalHidRpcMessage = (data: Uint8Array): RpcMessage | undefined => {

ui/src/hooks/useHidRpc.ts

@@ -142,7 +142,7 @@ export function useHidRpc(onHidRpcMessage?: (payload: RpcMessage) => void) {
 
   const cancelOngoingKeyboardMacro = useCallback(
     () => {
-      sendMessage(new CancelKeyboardMacroReportMessage());
+      sendMessage(new CancelKeyboardMacroReportMessage(""));
     },
     [sendMessage],
   );

ui/src/hooks/useKeyboard.ts

@@ -277,7 +277,6 @@ export default function useKeyboard() {
     cancelKeepAlive();
   }, [cancelKeepAlive]);
 
-
   // executeMacro is used to execute a macro consisting of multiple steps.
   // Each step can have multiple keys, multiple modifiers and a delay.
   // The keys and modifiers are pressed together and held for the delay duration.
@@ -292,9 +291,7 @@ export default function useKeyboard() {
     for (const [_, step] of steps.entries()) {
       const keyValues = (step.keys || []).map(key => keys[key]).filter(Boolean);
       const modifierMask: number = (step.modifiers || [])
-
         .map(mod => modifiers[mod])
-
         .reduce((acc, val) => acc + val, 0);
 
       // If the step has keys and/or modifiers, press them and hold for the delay
@@ -306,6 +303,7 @@ export default function useKeyboard() {
 
     sendKeyboardMacroEventHidRpc(macro);
   }, [sendKeyboardMacroEventHidRpc]);
+
   const executeMacroClientSide = useCallback(async (steps: MacroSteps) => {
     const promises: (() => Promise<void>)[] = [];
 

ui/src/routes/devices.$id.settings.hardware.tsx

@@ -1,11 +1,13 @@
-import { useEffect } from "react";
+import { useEffect, useState } from "react";
 
 import { SettingsItem } from "@components/SettingsItem";
 import { SettingsPageHeader } from "@components/SettingsPageheader";
+import { SettingsSectionHeader } from "@components/SettingsSectionHeader";
 import { BacklightSettings, useSettingsStore } from "@/hooks/stores";
 import { JsonRpcResponse, useJsonRpc } from "@/hooks/useJsonRpc";
 import { SelectMenuBasic } from "@components/SelectMenuBasic";
 import { UsbDeviceSetting } from "@components/UsbDeviceSetting";
+import { Checkbox } from "@components/Checkbox";
 
 import notifications from "../notifications";
 import { UsbInfoSetting } from "../components/UsbInfoSetting";
@@ -15,6 +17,7 @@ export default function SettingsHardwareRoute() {
   const { send } = useJsonRpc();
   const settings = useSettingsStore();
   const { setDisplayRotation } = useSettingsStore();
+  const [powerSavingEnabled, setPowerSavingEnabled] = useState(false);
 
   const handleDisplayRotationChange = (rotation: string) => {
     setDisplayRotation(rotation);
@@ -58,6 +61,21 @@ export default function SettingsHardwareRoute() {
     });
   };
 
+  const handlePowerSavingChange = (enabled: boolean) => {
+    setPowerSavingEnabled(enabled);
+    const duration = enabled ? 90 : -1;
+    send("setVideoSleepMode", { duration }, (resp: JsonRpcResponse) => {
+      if ("error" in resp) {
+        notifications.error(
+          `Failed to set power saving mode: ${resp.error.data || "Unknown error"}`,
+        );
+        setPowerSavingEnabled(!enabled); // Revert on error
+        return;
+      }
+      notifications.success(`Power saving mode ${enabled ? "enabled" : "disabled"}`);
+    });
+  };
+
   useEffect(() => {
     send("getBacklightSettings", {}, (resp: JsonRpcResponse) => {
       if ("error" in resp) {
@@ -70,6 +88,17 @@ export default function SettingsHardwareRoute() {
     });
   }, [send, setBacklightSettings]);
 
+  useEffect(() => {
+    send("getVideoSleepMode", {}, (resp: JsonRpcResponse) => {
+      if ("error" in resp) {
+        console.error("Failed to get power saving mode:", resp.error);
+        return;
+      }
+      const result = resp.result as { enabled: boolean; duration: number };
+      setPowerSavingEnabled(result.duration >= 0);
+    });
+  }, [send]);
+
   return (
     <div className="space-y-4">
       <SettingsPageHeader
@@ -167,6 +196,26 @@ export default function SettingsHardwareRoute() {
         </p>
       </div>
 
+      <FeatureFlag minAppVersion="0.4.9">
+        <div className="space-y-4">
+          <div className="h-px w-full bg-slate-800/10 dark:bg-slate-300/20" />
+          <SettingsSectionHeader
+            title="Power Saving"
+            description="Reduce power consumption when not in use"
+          />
+          <SettingsItem
+            badge="Experimental"
+            title="HDMI Sleep Mode"
+            description="Turn off capture after 90 seconds of inactivity"
+          >
+            <Checkbox
+              checked={powerSavingEnabled}
+              onChange={(e) => handlePowerSavingChange(e.target.checked)}
+            />
+          </SettingsItem>
+        </div>
+      </FeatureFlag>
+
       <FeatureFlag minAppVersion="0.3.8">
         <UsbDeviceSetting />
       </FeatureFlag>

web.go

@@ -230,7 +230,7 @@ func handleWebRTCSession(c *gin.Context) {
 	}
 
 	// Cancel any ongoing keyboard macro when session changes
-	cancelKeyboardMacro()
+	cancelAllRunningKeyboardMacros()
 
 	currentSession = session
 	c.JSON(http.StatusOK, gin.H{"sd": sd})

webrtc.go

@@ -34,7 +34,7 @@ type Session struct {
 	lastTimerResetTime       time.Time  // Track when auto-release timer was last reset
 	keepAliveJitterLock      sync.Mutex // Protect jitter compensation timing state
 	hidQueueLock             sync.Mutex
-	hidQueue                 []chan hidQueueMessage
+	hidQueues                []chan hidQueueMessage
 
 	keysDownStateQueue chan usbgadget.KeysDownState
 }
@@ -77,6 +77,7 @@ func (s *Session) resetKeepAliveTime() {
 type hidQueueMessage struct {
 	webrtc.DataChannelMessage
 	channel   string
+	timelimit time.Duration
 }
 
 type SessionConfig struct {
@@ -121,19 +122,20 @@ func (s *Session) ExchangeOffer(offerStr string) (string, error) {
 	return base64.StdEncoding.EncodeToString(localDescription), nil
 }
 
-func (s *Session) initQueues() {
+func (s *Session) initHidQueues() {
 	s.hidQueueLock.Lock()
 	defer s.hidQueueLock.Unlock()
 
-	s.hidQueue = make([]chan hidQueueMessage, 0)
-	for i := 0; i < 4; i++ {
-		q := make(chan hidQueueMessage, 256)
-		s.hidQueue = append(s.hidQueue, q)
-	}
+	s.hidQueues = make([]chan hidQueueMessage, hidrpc.OtherQueue+1)
+	s.hidQueues[hidrpc.HandshakeQueue] = make(chan hidQueueMessage, 2) // we don't really want to queue many handshake messages
+	s.hidQueues[hidrpc.KeyboardQueue] = make(chan hidQueueMessage, 256)
+	s.hidQueues[hidrpc.MouseQueue] = make(chan hidQueueMessage, 256)
+	s.hidQueues[hidrpc.MacroQueue] = make(chan hidQueueMessage, 10) // macros can be long, but we don't want to queue too many
+	s.hidQueues[hidrpc.OtherQueue] = make(chan hidQueueMessage, 256)
 }
 
-func (s *Session) handleQueues(index int) {
-	for msg := range s.hidQueue[index] {
+func (s *Session) handleQueue(queue chan hidQueueMessage) {
+	for msg := range queue {
 		onHidMessage(msg, s)
 	}
 }
@@ -188,17 +190,18 @@ func getOnHidMessageHandler(session *Session, scopedLogger *zerolog.Logger, chan
 		l.Trace().Msg("received data in HID RPC message handler")
 
 		// Enqueue to ensure ordered processing
-		queueIndex := hidrpc.GetQueueIndex(hidrpc.MessageType(msg.Data[0]))
-		if queueIndex >= len(session.hidQueue) || queueIndex < 0 {
+		queueIndex, timelimit := hidrpc.GetQueueIndex(hidrpc.MessageType(msg.Data[0]))
+		if queueIndex >= len(session.hidQueues) || queueIndex < 0 {
 			l.Warn().Int("queueIndex", queueIndex).Msg("received data in HID RPC message handler, but queue index not found")
-			queueIndex = 3
+			queueIndex = hidrpc.OtherQueue
 		}
 
-		queue := session.hidQueue[queueIndex]
+		queue := session.hidQueues[queueIndex]
 		if queue != nil {
 			queue <- hidQueueMessage{
 				DataChannelMessage: msg,
 				channel:            channel,
+				timelimit:          timelimit,
 			}
 		} else {
 			l.Warn().Int("queueIndex", queueIndex).Msg("received data in HID RPC message handler, but queue is nil")
@@ -248,7 +251,7 @@ func newSession(config SessionConfig) (*Session, error) {
 
 	session := &Session{peerConnection: peerConnection}
 	session.rpcQueue = make(chan webrtc.DataChannelMessage, 256)
-	session.initQueues()
+	session.initHidQueues()
 	session.initKeysDownStateQueue()
 
 	go func() {
@@ -258,8 +261,8 @@ func newSession(config SessionConfig) (*Session, error) {
 		}
 	}()
 
-	for i := 0; i < len(session.hidQueue); i++ {
-		go session.handleQueues(i)
+	for queue := range session.hidQueues {
+		go session.handleQueue(session.hidQueues[queue])
 	}
 
 	peerConnection.OnDataChannel(func(d *webrtc.DataChannel) {
@@ -284,7 +287,11 @@ func newSession(config SessionConfig) (*Session, error) {
 			session.RPCChannel = d
 			d.OnMessage(func(msg webrtc.DataChannelMessage) {
 				// Enqueue to ensure ordered processing
+				if session.rpcQueue != nil {
 					session.rpcQueue <- msg
+				} else {
+					scopedLogger.Warn().Msg("RPC message received but rpcQueue is nil")
+				}
 			})
 			triggerOTAStateUpdate()
 			triggerVideoStateUpdate()
@@ -352,22 +359,23 @@ func newSession(config SessionConfig) (*Session, error) {
 			_ = peerConnection.Close()
 		}
 		if connectionState == webrtc.ICEConnectionStateClosed {
-			scopedLogger.Debug().Msg("ICE Connection State is closed, unmounting virtual media")
+			scopedLogger.Debug().Msg("ICE Connection State is closed, tearing down session")
 			if session == currentSession {
 				// Cancel any ongoing keyboard report multi when session closes
-				cancelKeyboardMacro()
+				cancelAllRunningKeyboardMacros()
 				currentSession = nil
 			}
+
 			// Stop RPC processor
 			if session.rpcQueue != nil {
 				close(session.rpcQueue)
 				session.rpcQueue = nil
 			}
 
-			// Stop HID RPC processor
-			for i := 0; i < len(session.hidQueue); i++ {
-				close(session.hidQueue[i])
-				session.hidQueue[i] = nil
+			// Stop HID RPC processors
+			for i := 0; i < len(session.hidQueues); i++ {
+				close(session.hidQueues[i])
+				session.hidQueues[i] = nil
 			}
 
 			close(session.keysDownStateQueue)