GUI fields now trim leading and trailing whitespace:

cmd/mxl-player/config.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"mxl-player/internal/playback"
+	"strings"
 	"time"
 )
 
@@ -17,6 +18,10 @@ func resolveDomain(shared, override string) string {
 	return shared
 }
 
+func normalizeFeedInput(domain, uuid string) (string, string) {
+	return strings.TrimSpace(domain), strings.TrimSpace(uuid)
+}
+
 func resolveRetryPolicy(
 	cli playback.RetryPolicy,
 	cliMaxAttemptsSet bool,

cmd/mxl-player/config_test.go

@@ -183,3 +183,16 @@ func TestResolveRetryPolicy(t *testing.T) {
 		})
 	}
 }
+
+func TestNormalizeFeedInput(t *testing.T) {
+	domain, uuid := normalizeFeedInput(
+		" \t/dev/shm/mxl\n",
+		"\r 5fbec3b1-1b0f-417d-9059-8b94a47197ef \t",
+	)
+	if domain != "/dev/shm/mxl" {
+		t.Fatalf("domain = %q", domain)
+	}
+	if uuid != "5fbec3b1-1b0f-417d-9059-8b94a47197ef" {
+		t.Fatalf("UUID = %q", uuid)
+	}
+}

cmd/mxl-player/main.go

@@ -22,7 +22,7 @@ import (
 
 const (
 	APP_NAME         = "MXL Player"
-	APP_VER          = "0.1.0"
+	APP_VER          = "1.0.0"
 	WIN_WIDTH  int32 = 1280
 	WIN_HEIGHT int32 = 720
 )
@@ -377,6 +377,8 @@ func main() {
 		}
 	}
 	doReconnect := func() {
+		videoDomainStr, videoStr = normalizeFeedInput(videoDomainStr, videoStr)
+		audioDomainStr, audioStr = normalizeFeedInput(audioDomainStr, audioStr)
 		videoActive = videoStr != ""
 		audioActive = audioStr != ""
 
@@ -470,6 +472,8 @@ func main() {
 		displayedVideoWidth  uint32 = placeholderWidth
 		displayedVideoHeight uint32 = placeholderHeight
 		displayedVideoStride uint32 = placeholderStride
+		displayedVideoSource playback.FeedConfig
+		hasDisplayedVideo    bool
 
 		fps          float64
 		dropTracker  videoDropTracker
@@ -575,6 +579,16 @@ func main() {
 		}
 
 		snapshot, hasSnapshot := player.Controller.Snapshot()
+		desiredVideo := desiredVideoFeed(snapshot, hasSnapshot)
+		if !desiredVideo.Active ||
+			desiredVideo.Domain != displayedVideoSource.Domain ||
+			desiredVideo.UUID != displayedVideoSource.UUID {
+			hasDisplayedVideo = false
+		}
+		if hasFrame {
+			displayedVideoSource = shownSource
+			hasDisplayedVideo = shouldShowVideo(desiredVideo, shownSource)
+		}
 
 		// stats
 		if hasFrame {
@@ -722,7 +736,13 @@ func main() {
 				drawFeedsSections := func() {
 					cimgui.SeparatorText("Video")
 					cimgui.InputTextWithHint("Video domain", "/dev/shm/mxl", &videoDomainStr, 0, nil)
+					if cimgui.IsItemDeactivatedAfterEdit() {
+						videoDomainStr, _ = normalizeFeedInput(videoDomainStr, "")
+					}
 					cimgui.InputTextWithHint("Video UUID", "", &videoStr, 0, nil)
+					if cimgui.IsItemDeactivatedAfterEdit() {
+						_, videoStr = normalizeFeedInput("", videoStr)
+					}
 					if videoActive {
 						cimgui.SameLine()
 						if cimgui.Button("Stop##video") {
@@ -747,7 +767,13 @@ func main() {
 					}
 					cimgui.SeparatorText("Audio")
 					cimgui.InputTextWithHint("Audio domain", "/dev/shm/mxl", &audioDomainStr, 0, nil)
+					if cimgui.IsItemDeactivatedAfterEdit() {
+						audioDomainStr, _ = normalizeFeedInput(audioDomainStr, "")
+					}
 					cimgui.InputTextWithHint("Audio UUID", "", &audioStr, 0, nil)
+					if cimgui.IsItemDeactivatedAfterEdit() {
+						_, audioStr = normalizeFeedInput("", audioStr)
+					}
 					if audioActive {
 						cimgui.SameLine()
 						if cimgui.Button("Stop##audio") {
@@ -1062,6 +1088,7 @@ func main() {
 				displayedVideoWidth,
 				displayedVideoHeight,
 				displayedVideoStride,
+				hasDisplayedVideo,
 			)
 			if errors.Is(err, renderer.ErrOutOfDate) {
 				if rerr := r.RecreateSwapchain(); rerr != nil {

cmd/mxl-player/video_visibility.go

@@ -0,0 +1,30 @@
+package main
+
+import "mxl-player/internal/playback"
+
+func desiredVideoFeed(
+	snapshot playback.SessionSnapshot,
+	available bool,
+) playback.FeedConfig {
+	if !available {
+		return playback.FeedConfig{}
+	}
+	switch snapshot.Plan.Topology {
+	case playback.TopologyIndependent:
+		if snapshot.Plan.Video.Active {
+			return snapshot.Plan.Video
+		}
+	case playback.TopologySynchronized:
+		if snapshot.Plan.Sync.Active() {
+			return snapshot.Plan.Sync.Video
+		}
+	}
+	return playback.FeedConfig{}
+}
+
+func shouldShowVideo(
+	desired playback.FeedConfig,
+	delivered playback.FeedConfig,
+) bool {
+	return desired.Active && sameVideoSource(desired, delivered)
+}

cmd/mxl-player/video_visibility_test.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"testing"
+
+	"mxl-player/internal/playback"
+)
+
+func TestDesiredVideoFeed(t *testing.T) {
+	video := playback.FeedConfig{Domain: "/video", UUID: "video", Active: true}
+	tests := []struct {
+		name      string
+		available bool
+		plan      playback.SessionPlan
+		want      playback.FeedConfig
+	}{
+		{name: "snapshot unavailable"},
+		{name: "idle", available: true, plan: playback.SessionPlan{Topology: playback.TopologyIdle}},
+		{name: "audio only", available: true, plan: playback.SessionPlan{Topology: playback.TopologyIndependent}},
+		{name: "independent video", available: true, plan: playback.SessionPlan{Topology: playback.TopologyIndependent, Video: video}, want: video},
+		{name: "synchronized video", available: true, plan: playback.SessionPlan{Topology: playback.TopologySynchronized, Sync: playback.SyncPairConfig{Video: video, Audio: playback.FeedConfig{Active: true}}}, want: video},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got := desiredVideoFeed(playback.SessionSnapshot{Plan: test.plan}, test.available)
+			if got != test.want {
+				t.Fatalf("desiredVideoFeed() = %#v, want %#v", got, test.want)
+			}
+		})
+	}
+}
+
+func TestShouldShowVideoRequiresDesiredSource(t *testing.T) {
+	desired := playback.FeedConfig{Domain: "/video", UUID: "video", Active: true}
+	if !shouldShowVideo(desired, desired) {
+		t.Fatal("matching active video was hidden")
+	}
+	if shouldShowVideo(playback.FeedConfig{}, desired) {
+		t.Fatal("video was shown without an active desired feed")
+	}
+	other := desired
+	other.UUID = "other"
+	if shouldShowVideo(desired, other) {
+		t.Fatal("frame from old source was shown")
+	}
+}

internal/imgui/imgui.go

@@ -3,6 +3,8 @@ package imgui
 import (
 	"time"
 
+	"mxl-player/internal/sdl"
+
 	cimgui "github.com/AllenDang/cimgui-go/imgui"
 )
 
@@ -17,9 +19,20 @@ func New() *Context {
 	ctx := cimgui.CreateContext()
 	cimgui.SetCurrentContext(ctx)
 	io := cimgui.CurrentIO()
+	cimgui.CurrentPlatformIO().SetClipboardHandler(sdlClipboardHandler{})
 	return &Context{ctx: ctx, io: io}
 }
 
+type sdlClipboardHandler struct{}
+
+func (sdlClipboardHandler) GetClipboard() string {
+	return sdl.GetClipboardText()
+}
+
+func (sdlClipboardHandler) SetClipboard(text string) {
+	sdl.SetClipboardText(text)
+}
+
 func (c *Context) Destroy() {
 	cimgui.DestroyContext()
 }

internal/imgui/input_sdl3.go

@@ -7,6 +7,13 @@ import (
 	cimgui "github.com/AllenDang/cimgui-go/imgui"
 )
 
+const (
+	sdlKModShift uint16 = 0x0001 | 0x0002
+	sdlKModCtrl  uint16 = 0x0040 | 0x0080
+	sdlKModAlt   uint16 = 0x0100 | 0x0200
+	sdlKModGUI   uint16 = 0x0400 | 0x0800
+)
+
 // SDL3 event (128 byte raw buffer) -> imgui
 func (c *Context) ProcessEvent(event *[128]byte) {
 	eventType := *(*uint32)(unsafe.Pointer(&event[0]))
@@ -15,7 +22,9 @@ func (c *Context) ProcessEvent(event *[128]byte) {
 	switch eventType {
 	case sdl.EventKeyDown, sdl.EventKeyUp:
 		scancode := *(*uint32)(unsafe.Pointer(&event[24]))
+		modifiers := *(*uint16)(unsafe.Pointer(&event[32]))
 		down := eventType == sdl.EventKeyDown
+		c.addKeyModifiers(modifiers)
 		key := sdlScancodeToImGuiKey(scancode)
 		if key >= 0 {
 			c.io.AddKeyEvent(key, down)
@@ -47,6 +56,13 @@ func (c *Context) ProcessEvent(event *[128]byte) {
 	}
 }
 
+func (c *Context) addKeyModifiers(modifiers uint16) {
+	c.io.AddKeyEvent(cimgui.ModCtrl, modifiers&sdlKModCtrl != 0)
+	c.io.AddKeyEvent(cimgui.ModShift, modifiers&sdlKModShift != 0)
+	c.io.AddKeyEvent(cimgui.ModAlt, modifiers&sdlKModAlt != 0)
+	c.io.AddKeyEvent(cimgui.ModSuper, modifiers&sdlKModGUI != 0)
+}
+
 func sdlScancodeToImGuiKey(scancode uint32) cimgui.Key {
 	switch scancode {
 	case 40: // SDL_SCANCODE_RETURN
@@ -79,6 +95,10 @@ func sdlScancodeToImGuiKey(scancode uint32) cimgui.Key {
 		return cimgui.KeyLeftAlt
 	case 230: // SDL_SCANCODE_RALT
 		return cimgui.KeyRightAlt
+	case 227: // SDL_SCANCODE_LGUI
+		return cimgui.KeyLeftSuper
+	case 231: // SDL_SCANCODE_RGUI
+		return cimgui.KeyRightSuper
 	default:
 		// Letters A-Z: scancodes 4-29 map to ImGui KeyA-KeyZ
 		if scancode >= 4 && scancode <= 29 {

internal/renderer/renderer.go

@@ -455,7 +455,12 @@ func validateFramePayload(
 
 // DrawFrame acquires an image, records commands, submits, and presents.
 // Returns ErrOutOfDate if the swapchain needs recreation
-func (r *Renderer) DrawFrame(videoW, videoH, stride uint32) error {
+func (r *Renderer) DrawFrame(
+	videoW uint32,
+	videoH uint32,
+	stride uint32,
+	showVideo bool,
+) error {
 	imageIndex, res := r.dev.AcquireNextImage(r.swapchain, r.imageAvailable, ^uint64(0))
 	if res == vk.ErrorOutOfDateKHR || res == vk.SuboptimalKHR {
 		return ErrOutOfDate
@@ -483,7 +488,7 @@ func (r *Renderer) DrawFrame(videoW, videoH, stride uint32) error {
 		r.fbs[imageIndex],
 		vk.Rect2D{Offset: vk.Offset2D{X: 0, Y: 0}, Extent: r.extent},
 		[]vk.ClearValue{
-			vk.ClearColor(0.0, 0.0, 0.0, 1.0),
+			vk.ClearColor(0.025, 0.03, 0.04, 1.0),
 			vk.ClearDepthStencil(1.0, 0),
 		},
 	)
@@ -494,6 +499,7 @@ func (r *Renderer) DrawFrame(videoW, videoH, stride uint32) error {
 		MinDepth: 0, MaxDepth: 1,
 	})
 	cmd.SetScissor(vk.Rect2D{Offset: vk.Offset2D{X: 0, Y: 0}, Extent: r.extent})
+	if showVideo {
 		cmd.BindPipeline(r.decodePipeline)
 		cmd.BindDescriptorSet(r.decodeLayout, 0, r.decodeSet)
 		pc := PushConstants{
@@ -505,6 +511,7 @@ func (r *Renderer) DrawFrame(videoW, videoH, stride uint32) error {
 		}
 		cmd.PushConstants(r.decodeLayout, vk.ShaderStageFragment, 0, unsafe.Pointer(&pc), 20)
 		cmd.Draw(3, 1, 0, 0)
+	}
 	if r.ImGuiDraw != nil {
 		r.ImGuiDraw(cmd)
 	}

internal/sdl/sdl.go

@@ -65,6 +65,9 @@ var (
 
 	sdlStartTextInput   func(window uintptr)
 	sdlStopTextInput    func(window uintptr)
+	sdlGetClipboardText func() uintptr
+	sdlSetClipboardText func(text *byte) bool
+	sdlFree             func(memory uintptr)
 )
 
 var loaded = false
@@ -98,6 +101,9 @@ func Load() error {
 	// input
 	purego.RegisterLibFunc(&sdlStartTextInput, h, "SDL_StartTextInput")
 	purego.RegisterLibFunc(&sdlStopTextInput, h, "SDL_StopTextInput")
+	purego.RegisterLibFunc(&sdlGetClipboardText, h, "SDL_GetClipboardText")
+	purego.RegisterLibFunc(&sdlSetClipboardText, h, "SDL_SetClipboardText")
+	purego.RegisterLibFunc(&sdlFree, h, "SDL_free")
 	loaded = true
 	return nil
 }
@@ -197,3 +203,21 @@ func GetAudioPlaybackDevices() []AudioDevice {
 // Input wrappers
 func StartTextInput(window uintptr) { sdlStartTextInput(window) }
 func StopTextInput(window uintptr)  { sdlStopTextInput(window) }
+
+func GetClipboardText() string {
+	text := sdlGetClipboardText()
+	if text == 0 {
+		return ""
+	}
+	result := cstr(text)
+	sdlFree(text)
+	return result
+}
+
+func SetClipboardText(text string) bool {
+	bytes := make([]byte, len(text)+1)
+	copy(bytes, text)
+	result := sdlSetClipboardText(&bytes[0])
+	runtime.KeepAlive(bytes)
+	return result
+}