feat(audio1): add AI noise reduction support

1. Added AiReduceNoise and AiNoiseSourcePath D-Bus properties for toggling AI noise reduction
2. Implemented writeAiReduceNoise callback and DConfig persistence for AI noise reduction state
3. Added rnnoise virtual source handling: skip port check, prevent auto-switch when active
4. Added GetDefaultInputPortAnyCard() helper for AI noise recovery across cards
5. Registered CheckPort method for Meter and SinkInput in D-Bus export
6. Added aiReduceNoiseEnabled DConfig key for global AI noise reduction setting

Log: Add AI noise reduction feature with D-Bus properties, DConfig persistence, and rnnoise virtual source handling

feat(audio1): 添加 AI 降噪功能支持

1. 添加 AiReduceNoise 和 AiNoiseSourcePath D-Bus 属性用于开关 AI 降噪
2. 实现 writeAiReduceNoise 回调及 DConfig 持久化 AI 降噪状态
3. 添加 rnnoise 虚拟声源处理：跳过端口检查，开启时阻止自动切换
4. 添加 GetDefaultInputPortAnyCard() 辅助方法用于跨声卡恢复 AI 降噪
5. 为 Meter 和 SinkInput 注册 CheckPort 方法到 D-Bus 导出
6. 添加 aiReduceNoiseEnabled DConfig 键用于全局 AI 降噪设置

Log: 新增 AI 降噪功能，包含 D-Bus 属性、DConfig 持久化及 rnnoise 虚拟声源处理
PMS: STORY-41229

Author: MyLeeJiEun

audio1/audio.go

@@ -9,8 +9,10 @@ import (
 	"fmt"
 	"math"
 	"os"
+	"os/exec"
 	"regexp"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -63,6 +65,9 @@ const (
 	dsgKeyBluezModeDefault        = "bluezModeDefault"
 	dsgKeyMonoEnabled             = "monoEnabled"
 	dsgKeyReduceNoiseEnabled      = "reduceNoiseEnabled" // 降噪配置，保存用户数据
+	dsgKeyAiReduceNoiseEnabled    = "aiReduceNoiseEnabled"
+	dsgKeyAiNoiseSourceName       = "aiNoisePhysicalSourceName" // 开启AI降噪时持久化的物理麦克风名
+	rnnoiseSourceName             = "effect_output.rnnoise"
 
 	dsgKeyFirstRun                 = "firstRun"
 	dsgKeyInputVolume              = "inputVolume"
@@ -95,7 +100,7 @@ const (
 	AudioStateChanging = false
 )
 
-//go:generate dbusutil-gen -type Audio,Sink,SinkInput,Source,Meter -import github.com/godbus/dbus audio.go sink.go sinkinput.go source.go meter.go
+//go:generate dbusutil-gen -type Audio,Sink,SinkInput,Source,Meter -import github.com/godbus/dbus/v5 audio.go sink.go sinkinput.go source.go meter.go
 //go:generate dbusutil-gen em -type Audio,Sink,SinkInput,Source,Meter
 
 func objectPathSliceEqual(v1, v2 []dbus.ObjectPath) bool {
@@ -151,6 +156,12 @@ type Audio struct {
 
 	ReduceNoise bool `prop:"access:rw"`
 
+	AiReduceNoise bool `prop:"access:rw"`
+
+	AiNoiseSourcePath dbus.ObjectPath
+
+	aiNoiseSourceName string
+
 	defaultPaCfg defaultPaConfig
 
 	// 最大音量
@@ -240,6 +251,10 @@ func newAudio(service *dbusutil.Service) *Audio {
 	a.PausePlayer = false
 	a.ReduceNoise = false
 	a.emitPropChangedReduceNoise(a.ReduceNoise)
+	a.AiReduceNoise = false
+	a.emitPropChangedAiReduceNoise(a.AiReduceNoise)
+	a.AiNoiseSourcePath = "/"
+	a.emitPropChangedAiNoiseSourcePath(a.AiNoiseSourcePath)
 	a.CurrentAudioServer = a.getCurrentAudioServer()
 	a.headphoneUnplugAutoPause, err = a.audioDConfig.GetValueBool(dsgKeyHeadphoneUnplugAutoPause)
 	if err != nil {
@@ -804,6 +819,10 @@ func (a *Audio) init() error {
 
 	// 更新本地数据
 	a.refresh()
+
+	// After refresh, run AI noise-reduction init with both DConfig and
+	// source list available.
+	a.initAiReduceNoise()
 	logger.Debug("init cards")
 	a.PropsMu.Lock()
 	a.setPropCards(a.cards.string())
@@ -941,6 +960,29 @@ func (a *Audio) findSource(cardId uint32, activePortName string) *Source {
 	return nil
 }
 
+// getSourcePathByName returns the D-Bus object path of the source whose Name
+// matches, or "/" if not found. Used to expose the physical mic's Source path
+// to control center while AI noise reduction is enabled.
+func (a *Audio) getSourcePathByName(name string) dbus.ObjectPath {
+	if name == "" {
+		return "/"
+	}
+	a.mu.Lock()
+	defer a.mu.Unlock()
+	for _, source := range a.sources {
+		if source.Name == name {
+			return source.getPath()
+		}
+	}
+	return "/"
+}
+
+// updateAiNoiseSourcePath refreshes the AiNoiseSourcePath D-Bus property from
+// aiNoiseSourceName. Call under PropsMu.
+func (a *Audio) updateAiNoiseSourcePath() {
+	a.setPropAiNoiseSourcePath(a.getSourcePathByName(a.aiNoiseSourceName))
+}
+
 func (a *Audio) SetPortEnabled(cardId uint32, portName string, enabled bool) *dbus.Error {
 	logger.Infof("dbus call SetPortEnabled with cardId %d, portName %s and enabled %t", cardId, portName, enabled)
 
@@ -1868,6 +1910,19 @@ func (a *Audio) initDsgProp() error {
 	}
 	getReduceNoiseEnabled()
 
+	getAiReduceNoiseEnabled := func() {
+		aiReduceNoiseEnabled, err := a.audioDConfig.GetValueBool(dsgKeyAiReduceNoiseEnabled)
+		if err != nil {
+			logger.Warningf("aiReduceNoise DConfig: GetValueBool failed: %v", err)
+			return
+		}
+		logger.Infof("aiReduceNoise: DConfig=%v, calling setAiReduceNoise", aiReduceNoiseEnabled)
+		a.setAiReduceNoise(aiReduceNoiseEnabled)
+	}
+	// NOTE: do NOT call getAiReduceNoiseEnabled() during initDsgProp — it runs
+	// before refresh() and would get an empty default-source name. The actual
+	// init is done in initAiReduceNoise() after refresh().
+
 	a.audioDConfig.ConnectValueChanged(func(key string) {
 		switch key {
 		case dsgKeyAutoSwitchPort:
@@ -1884,6 +1939,8 @@ func (a *Audio) initDsgProp() error {
 			getMonoEnabled()
 		case dsgKeyVolumeIncrease:
 			a.handleVolumeIncrease()
+		case dsgKeyAiReduceNoiseEnabled:
+			getAiReduceNoiseEnabled()
 		}
 	})
 
@@ -2009,3 +2066,228 @@ func (a *Audio) isModuleExist(name string) bool {
 	}
 	return false
 }
+
+func (a *Audio) paDefaultSourceIs(target string) bool {
+	out, err := exec.Command("pactl", "get-default-source").Output()
+	if err != nil {
+		return false
+	}
+	return strings.TrimSpace(string(out)) == target
+}
+
+func (a *Audio) recoverPhysicalSourceName() string {
+	runtimeDir := os.Getenv("XDG_RUNTIME_DIR")
+	if runtimeDir == "" {
+		runtimeDir = "/run/user/" + strconv.Itoa(os.Getuid())
+	}
+
+	// 1) rnnoise-toggle's saved original source (tmpfs, may be gone after reboot).
+	stateFile := runtimeDir + "/rnnoise-toggle-original-source"
+	if data, err := os.ReadFile(stateFile); err == nil {
+		name := strings.TrimSpace(string(data))
+		if name != "" && name != rnnoiseSourceName {
+			return name
+		}
+	}
+
+	// 2) ConfigKeeper: find the source whose ActivePort matches the user's
+	// saved DefaultInputPort. This is the most reliable source across reboots
+	// because it records the port the user manually selected.
+	defaultPort := GetConfigKeeper().GetDefaultInputPortAnyCard()
+	if defaultPort != "" {
+		a.mu.Lock()
+		for _, s := range a.sources {
+			if s.ActivePort.Name == defaultPort && s.Name != rnnoiseSourceName {
+				name := s.Name
+				a.mu.Unlock()
+				return name
+			}
+		}
+		a.mu.Unlock()
+	}
+
+	// 3) DConfig — survives reboot but can be stale/wrong on multi-mic systems.
+	if name, err := a.audioDConfig.GetValueString(dsgKeyAiNoiseSourceName); err == nil {
+		name = strings.TrimSpace(name)
+		if name != "" && name != rnnoiseSourceName {
+			return name
+		}
+	}
+
+	// 4) Fallback: scan pactl source list for a non-rnnoise, non-monitor source.
+	out, err := exec.Command("pactl", "list", "sources", "short").Output()
+	if err != nil {
+		return ""
+	}
+	for _, line := range strings.Split(string(out), "\n") {
+		fields := strings.Fields(line)
+		if len(fields) >= 2 {
+			name := fields[1]
+			if name != rnnoiseSourceName && !strings.Contains(name, ".monitor") {
+				return name
+			}
+		}
+	}
+	return ""
+}
+
+func (a *Audio) setAiReduceNoise(enable bool) error {
+	a.PropsMu.Lock()
+	sameAsCurrent := a.AiReduceNoise == enable
+	if sameAsCurrent {
+		// Already in the requested state.
+		a.PropsMu.Unlock()
+		return nil
+	}
+
+	// Compute aiNoiseSourceName under lock before rnnoise-toggle changes
+	// the PA default source (which would trigger updateDefaultSource on
+	// the PA goroutine and race on aiNoiseSourceName).
+	var micName string
+	var micNameRecovered bool // true if micName came from recoverPhysicalSourceName()
+	if enable {
+		if defaultPort := GetConfigKeeper().GetDefaultInputPortAnyCard(); defaultPort != "" {
+			a.mu.Lock()
+			for _, s := range a.sources {
+				if s.ActivePort.Name == defaultPort && s.Name != rnnoiseSourceName {
+					micName = s.Name
+					break
+				}
+			}
+			a.mu.Unlock()
+		}
+		if micName == "" {
+			micName = a.getDefaultSourceName()
+			if micName == rnnoiseSourceName || micName == "" {
+				micName = a.recoverPhysicalSourceName()
+				micNameRecovered = true
+			}
+		}
+		a.aiNoiseSourceName = micName
+	} else {
+		micName = a.aiNoiseSourceName
+	}
+	a.PropsMu.Unlock()
+
+	// Phase 2: Execute PA operations (outside PropsMu to avoid blocking
+	// PA event handlers like updateDefaultSource).
+	if enable {
+		// Enable rnnoise: rnnoise-toggle saves the current default source
+		// (the physical mic) and sets effect_output.rnnoise as default.
+		cmd := exec.Command("rnnoise-toggle", "-q", "on")
+		err := cmd.Run()
+		if err != nil {
+			// rnnoise-toggle -q on exits 1 when default source is already
+			// effect_output.rnnoise (save_original_source rejects its own).
+			if a.paDefaultSourceIs(rnnoiseSourceName) {
+				logger.Warningf("rnnoise-toggle -q on reported failure "+
+					"but default source is already %s; continuing", rnnoiseSourceName)
+			} else {
+				logger.Warning("failed to enable ai reduce noise:", err)
+				return err
+			}
+		}
+	} else {
+		args := []string{"-q", "off"}
+		if micName != "" {
+			args = append(args, micName)
+		}
+		cmd := exec.Command("rnnoise-toggle", args...)
+		err := cmd.Run()
+		if err != nil {
+			if !a.paDefaultSourceIs(rnnoiseSourceName) {
+				logger.Warningf("rnnoise-toggle -q off reported failure "+
+					"but default source is no longer %s; continuing", rnnoiseSourceName)
+			} else {
+				logger.Warning("failed to disable ai reduce noise:", err)
+				return err
+			}
+		}
+	}
+
+	// Phase 3: Update property and persist DConfig (only on success).
+	a.PropsMu.Lock()
+	a.setPropAiReduceNoise(enable)
+	if enable {
+		// AiNoiseSourceName was computed in Phase 1; refresh the path so
+		// control center can bind the volume slider to the physical mic.
+		a.updateAiNoiseSourcePath()
+	} else {
+		// Clear the path — DefaultSource is the physical mic again.
+		if a.AiNoiseSourcePath != "/" {
+			a.AiNoiseSourcePath = "/"
+			a.emitPropChangedAiNoiseSourcePath(a.AiNoiseSourcePath)
+		}
+	}
+	a.PropsMu.Unlock()
+	if err := a.audioDConfig.SetValue(dsgKeyAiReduceNoiseEnabled, enable); err != nil {
+		logger.Warning("failed to persist aiReduceNoiseEnabled to dconfig:", err)
+	}
+	if enable && !micNameRecovered {
+		if err := a.audioDConfig.SetValue(dsgKeyAiNoiseSourceName, micName); err != nil {
+			logger.Warning("failed to persist aiNoisePhysicalSourceName to dconfig:", err)
+		}
+	} else if !enable {
+		if err := a.audioDConfig.SetValue(dsgKeyAiNoiseSourceName, ""); err != nil {
+			logger.Warning("failed to clear aiNoisePhysicalSourceName in dconfig:", err)
+		}
+	}
+	return nil
+}
+
+func (a *Audio) initAiReduceNoise() {
+	logger.Debug("initAiReduceNoise")
+
+	// 1. Check if rnnoise source already exists in the source list.
+	a.mu.Lock()
+	rnnoiseFound := false
+	for _, src := range a.sources {
+		if src.Name == rnnoiseSourceName {
+			rnnoiseFound = true
+			break
+		}
+	}
+	a.mu.Unlock()
+
+	// 2. Check DConfig value.
+	aiReduceNoiseEnabled, err := a.audioDConfig.GetValueBool(dsgKeyAiReduceNoiseEnabled)
+	if err != nil {
+		logger.Warningf("initAiReduceNoise: DConfig GetValueBool failed: %v", err)
+	}
+
+	shouldEnable := aiReduceNoiseEnabled
+	if err != nil && rnnoiseFound {
+		shouldEnable = true
+	}
+	if !shouldEnable {
+		logger.Infof("initAiReduceNoise: DConfig=%v (err=%v), rnnoiseFound=%v, nothing to do",
+			aiReduceNoiseEnabled, err != nil, rnnoiseFound)
+		return
+	}
+
+	logger.Infof("initAiReduceNoise: DConfig=%v, rnnoiseFound=%v, calling setAiReduceNoise(true)",
+		aiReduceNoiseEnabled, rnnoiseFound)
+	if err := a.setAiReduceNoise(true); err != nil {
+		logger.Warning("initAiReduceNoise: setAiReduceNoise(true) failed:", err)
+		return
+	}
+
+	a.PropsMu.RLock()
+	micName := a.aiNoiseSourceName
+	a.PropsMu.RUnlock()
+	if micName != "" {
+		a.mu.Lock()
+		var micSource *Source
+		for _, s := range a.sources {
+			if s.Name == micName {
+				micSource = s
+				break
+			}
+		}
+		a.mu.Unlock()
+		if micSource != nil {
+			logger.Infof("initAiReduceNoise: resumeSourceConfig for %s", micName)
+			a.resumeSourceConfig(micSource)
+		}
+	}
+}