切后命名方案三(用户拍板):名字不诞生于开火,只诞生于切后纯净窗:

- 开火(FASTROLL/ONSET)不再发号发注册——只切行,grayLinePending 灰行先开(未识别);switchSerial/switchPrevActive 记录本切次
- deferredNaming(T+1.5~3.5s,取切后尾1.5s纯净素材,补喂机制保证全为新说法人声音):强匹配开火前主≥0.5→撤销误切;匹配已知人→上其名;确认无人(<0.42)→发新号双空间注册(素材干净永不产幽灵);灰色带→留灰由判定链收编
- adoptSwitchLabel(灰行就地冠名/未建行走预置);undoSwitch(重开抹迹/改签并回);serial 每次落地后自增防双发
- 根治病史:16:21 S6潮(单人在2.5min被8连发开火发出S7~S21七个幽灵,源自开火窗混合素材);新日志锚 NAMING-UNDO/ADOPT/NEW/WEAK

app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt

@@ -221,10 +221,6 @@ class MainActivity : AppCompatActivity() {
     private val onsetMinSamples = 19200     // 1.2s 开口窗
     // 喂料恒定滞后(2026-09-16):识别流滞后 1.2s 喂入,切点前的音频可改道;
     // 全局字幕延迟 ~1.2s 的代价换取换人零串行
-    // 主动撤销的强度门槛(2026-09-16 实锤:短插嘴混合窗复核出 0.5~0.6 弱匹配,
-    // 二元"认得出"误撤了 0.04 深低的真实异常;同人确认分实测 0.70~1.00,
-    // 0.68 取安全带) —— 复核低于此分只留痕不撤销,让切换立住
-    private val revertCancelMin = 0.68f
     // 快速滚动通道(2026-09-16 用户三次拍板后终定 C:维持 2s 窗——最快档,
     // 接受误切闪烁,由并回自愈兜底)。窗长演化留档:2s(风暴,单窗20发/5min)
     // →3s(折中)→ 终选回 2s;护持:连续两窗/注册表复用/销案/冷却/并回自愈。
@@ -234,6 +230,8 @@ class MainActivity : AppCompatActivity() {
     private val fastStepSamples = 16000     // 1s
     private val fastWinSamples = 32000      // 2s 尾窗(用户终选)
     private val fastMinSamples = 24000      // ≥1.5s 才判
+    private val namingWinSamples = 24000     // 切后命名窗 1.5s(纯净素材,方案三)
+    private val namingMinSamples = 16000     // ≥1s 才判
     private val feedLagSamples = 24000   // 1.5s:覆盖判定链(1.2s采集+计算)的
     // 余量,开口渗漏≈0;全局字幕延迟即此值,调参范围 1.2~1.5s
     @Volatile private var onsetSeq = 0L     // 行切换/会话开始作废在途开口判定
@@ -249,6 +247,12 @@ class MainActivity : AppCompatActivity() {
     @Volatile private var pendingForceEndpoint = false
     // 滞后喂料的切点冻结请求(判定线程置位,录制线程消费,2026-09-16)
     @Volatile private var cutRequested = false
+    // 切后命名(方案三,2026-09-16):开火只切行(灰行);名字由"切后纯净窗"
+    // 在 T+2.5s 诞生——强匹配旧人→上其名或撤销误切;确认无人→发新号(素材
+    // 干净,永不产幽灵);灰色地带留灰由判定链收编。serial 作废在途命名
+    @Volatile private var switchSerial = 0L
+    @Volatile private var switchPrevActive: String? = null
+    private var grayLinePending = false   // 主线程:下一新行先以灰行开(等命名)
     private val forceSwitchStreaks = 2
     // 强切冷却(仅 speakerCheckHandler 线程访问,无需 volatile)
     private var lastForceSwitchAtMs = 0L
@@ -653,6 +657,7 @@ class MainActivity : AppCompatActivity() {
         var silenceRun = 0
         var onsetRun = 0   // 开口即查:静音后已累积的开口语音采样数
         var fastSince = 0   // 快速滚动通道:1s 周期的采样计数
+        var lastCutConsumeMs = 0L   // 方案三:最近一次切点冻结的时刻(命名窗锚)
         // 恒定滞后喂料(2026-09-16):音频先进 pendingBuf,滞后 feedLagSamples
         // 再喂识别流/样本缓冲(窗口分析保持实时)。换人决定时冻结缓冲,
         // 断句后补喂给新流——新人开头音频从不进入旧句子。
@@ -676,6 +681,7 @@ class MainActivity : AppCompatActivity() {
                 if (!frozen && cutRequested) {
                     cutRequested = false
                     frozen = true
+                    lastCutConsumeMs = SystemClock.elapsedRealtime()
                     if (sentenceId != -1L) pendingForceEndpoint = true
                     Log.i(TAG, "ONSET-HOLD frozen pending=" +
                             "${pendingSamples * 1000 / sampleRateInHz}ms")
@@ -711,19 +717,16 @@ class MainActivity : AppCompatActivity() {
                                     val simFast = SpeakerRecognition.similarity(
                                         fastEmb, anchor)
                                     if (simFast >= emaAbsorbMin) return@post
-                                    // 乐观快切(2026-09-16 用户拍板:第一次识别
+                                    // 方案三(2026-09-16):开火不发号——只切行(灰行),
-                                    // 先切,出错由判定链并回自愈;准确复核不再
+                                    // 名字由切后纯净窗在 T+2.5s 诞生
-                                    // 挡在切换前,只做善后)
+                                    val serial = ++switchSerial
-                                    val active = activeLabelForWindow
+                                    switchPrevActive = activeLabelForWindow
-                                    val label = SpeakerRecognition.nextAutoLabel().also {
-                                        SpeakerRecognition.fastRegistry.addAuto(it, fastEmb)
-                                    }
                                     Log.i(TAG, "ONSET-SWITCH fastSim=" +
                                             "%.2f".format(simFast) +
-                                            " label=$label active=${active ?: "-"}")
+                                            " serial=$serial active=" +
+                                            (switchPrevActive ?: "-"))
                                     cutRequested = true
-                                    uiHandler.post { onOnsetSwitch(label) }
+                                    uiHandler.post { onOnsetSwitch(null) }
-                                    accurateRecheckAfterSwitch(slice, label, active, "ONSET")
                                 }
                             }
                         }
@@ -742,6 +745,22 @@ class MainActivity : AppCompatActivity() {
                     if (fastSince >= fastStepSamples) {
                         fastSince = 0
                         val winF = window.snapshot()
+                        // 方案三:开火后 1.5~3.5s 的 tick 走"切后命名"(纯净素材)
+                        val namingSerial = if (lastCutConsumeMs != 0L) {
+                            val dt = SystemClock.elapsedRealtime() - lastCutConsumeMs
+                            if (dt in 1_500L..3_500L) switchSerial else 0L
+                        } else 0L
+                        if (namingSerial != 0L) {
+                            val nN = namingWinSamples.coerceAtMost(winF.size)
+                            if (nN >= namingMinSamples &&
+                                rmsOf(winF) >= minWindowRms
+                            ) {
+                                val tailN = winF.copyOfRange(winF.size - nN, winF.size)
+                                speakerCheckHandler.post {
+                                    deferredNaming(namingSerial, tailN)
+                                }
+                            }
+                        } else {
                             val nF = fastWinSamples.coerceAtMost(winF.size)
                             if (nF >= fastMinSamples && rmsOf(winF) >= minWindowRms) {
                             val tailF = winF.copyOfRange(winF.size - nF, winF.size)
@@ -761,8 +780,7 @@ class MainActivity : AppCompatActivity() {
                                 if (fastRollLowStreak < 2) return@post
                                 fastRollLowStreak = 0
                                 val active = activeLabelForWindow
-                                // 先查注册表:认出当前人 → 销案(白捡的防护);
+                                // 先查注册表:认出当前人 → 销案(白捡的防护)
-                                // 认出别人 → 复用其编号;彻底陌生才发新号
                                 val known = rollingSpeakerSearch(emb)
                                 if (known != null && known == active) {
                                     fastRollLowStreak = 0
@@ -774,18 +792,16 @@ class MainActivity : AppCompatActivity() {
                                     return@post
                                 }
                                 lastForceSwitchAtMs = nowMs
-                                val label = known
+                                // 方案三(2026-09-16):开火不发号——只切行(灰行),
-                                    ?: SpeakerRecognition.nextAutoLabel().also {
+                                // 名字由切后纯净窗在 T+2.5s 诞生
-                                        SpeakerRecognition.fastRegistry.addAuto(it, emb)
+                                val serial = ++switchSerial
-                                    }
+                                switchPrevActive = active
                                 Log.i(TAG, "FASTROLL-SWITCH sim=" +
                                         "%.2f".format(sim) +
-                                        " label=$label kind=" +
+                                        " serial=$serial active=${active ?: "-"}")
-                                        (if (known != null) "known" else "new") +
-                                        " active=${active ?: "-"}")
                                 cutRequested = true
-                                uiHandler.post { onOnsetSwitch(label) }
+                                uiHandler.post { onOnsetSwitch(null) }
-                                accurateRecheckAfterSwitch(tailF, label, active, "FASTROLL")
+                            }
                             }
                         }
                     }
@@ -1787,15 +1803,15 @@ class MainActivity : AppCompatActivity() {
     // 底行还有在途句(旧人话尾仍在流里)→ 借强 endpoint 定格它,定格完成
     // 再封行(onsetClosePending,见 finalizeSentence);已在途句为空则直接
     // 封行。新标签经 pendingOnsetLabel 交给 appendNewLine。
-    private fun onOnsetSwitch(label: String) {
+    private fun onOnsetSwitch(label: String?) {
         val list = if (historyMode) stashedLiveLines ?: subtitleLines else subtitleLines
         val bottom = list.lastOrNull() ?: return
         pendingOnsetLabel = label
         pendingOnsetLabelAt = SystemClock.elapsedRealtime()
-        // 换行标签不依赖"partial 及时到达"(2026-09-16:预置 5s 过期曾致新行
+        // 方案三(2026-09-16):开火传 null → 下一新行先以灰行开("未识别"),
-        // 沿用旧标签,观感=没换人——实锤 S2 案预置 16s 后丢弃):落锤即写
+        // 名字等切后纯净窗;deferredNaming 结果经 adoptSwitchLabel 补上
-        // 最近确认说话人,此后任何时刻开的新行都挂新标
+        if (label == null) grayLinePending = true
-        lastConfirmedLabel = label
+        if (label != null) lastConfirmedLabel = label
         if (!bottom.open) return   // 底行已封:下一行自然消费预置标签
         val busy = bottom.sentences.any { !it.finalized }
         if (busy) {
@@ -1814,73 +1830,91 @@ class MainActivity : AppCompatActivity() {
         Log.i(TAG, "ONSET-CLOSE no-sentence forced endpoint")
     }
 
-    /** 乐观切换后的准确空间善后(2026-09-16 用户拍板:先切后改):切换已
+    /** 切后命名(方案三,2026-09-16 用户拍板):开火后 1.5~3.5s,用切后
-     *  发出,本函数只做善后——认得出是当前人 → 留痕(切错由判定链"并回"
+     *  纯净窗(补喂保证该段已完全是新说法人的声音)做准确判定——
-     *  自愈);真新人 → 补写准确空间(防后续重发号);认出别人 → 留痕(判定
+     *  强匹配开火前主 → 误切撤销;强匹配某已知人 → 上其名;确认无人
-     *  链迁回)。在 speakerCheckHandler 线程执行。 */
+     *  (最好分 < 0.42)→ 发新号注册(素材干净,永不产幽灵);灰色地带留灰,
-    private fun accurateRecheckAfterSwitch(
+     *  由判定链收编。在 speakerCheckHandler 线程执行。 */
-        samples: FloatArray, label: String, active: String?, tag: String,
+    private fun deferredNaming(serial: Long, samples: FloatArray) {
-    ) {
+        if (serial != switchSerial) return
+        val prevActive = switchPrevActive
         val acc = SpeakerRecognition.computeEmbedding(samples, sampleRateInHz)
             ?: return
         val r = SpeakerRecognition.registry.nearestRank(acc)
-        val pre = r.name
+        val name = r.name
         val score = r.score
         when {
-            pre != null && pre == active && score >= revertCancelMin -> {
+            name != null && name == prevActive && score >= speakerThreshold -> {
-                Log.i(TAG, tag + "-CANCEL-LATE known=$pre(active)" +
+                Log.i(TAG, "NAMING-UNDO serial=$serial known=$name" +
-                        " score=" + "%.2f".format(score) + " active-heal")
+                        " score=" + "%.2f".format(score))
-                // 主动善后:不再被动等句子结束(长句让错标挂几十秒),立即撤销
+                uiHandler.post { undoSwitch(serial) }
-                uiHandler.post { revertOnsetSwitch(label, pre) }
             }
-            pre != null && pre == active -> {
+            name != null && score >= speakerThreshold -> {
-                // 弱匹配(短插嘴混合窗常见 0.5~0.6):不撤销,让切换立住
+                Log.i(TAG, "NAMING-ADOPT serial=$serial label=$name" +
-                Log.i(TAG, tag + "-WEAK-SAME known=$pre" +
+                        " score=" + "%.2f".format(score))
-                        " score=" + "%.2f".format(score) +
+                uiHandler.post { adoptSwitchLabel(serial, name) }
-                        " < $revertCancelMin keep-switch")
             }
-            pre != null ->
+            name == null || score < verdictFallbackMin -> {
-                Log.i(TAG, tag + "-RECHECK known=$pre" +
+                // 确认无人:发新号 + 双空间注册(纯净素材)
-                        " score=" + "%.2f".format(score) +
+                val fastEmb = SpeakerRecognition.computeEmbeddingFast(
-                        " label=$label (verdict migrates)")
+                    samples, sampleRateInHz)
-            else -> SpeakerRecognition.registry.addAuto(label, acc)
+                val label = SpeakerRecognition.nextAutoLabel().also {
+                    SpeakerRecognition.registry.addAuto(it, acc)
+                    if (fastEmb != null) {
+                        SpeakerRecognition.fastRegistry.addAuto(it, fastEmb)
+                    }
+                }
+                Log.i(TAG, "NAMING-NEW serial=$serial label=$label")
+                uiHandler.post { adoptSwitchLabel(serial, label) }
+            }
+            else -> Log.i(TAG, "NAMING-WEAK serial=$serial known=$name" +
+                    " score=" + "%.2f".format(score) + " keep-gray")
         }
     }
 
-    /** 乐观切换的主动善后(2026-09-16"善后不理想"整改):准确复核认出同一
+    /** 命名落地(主线程):灰行就地冠名;灰行未建立 → 走预置标签给下一行 */
-     *  人时立即撤销,不等句子结束——覆盖预置标签、还原钉住的标签、占位行
+    private fun adoptSwitchLabel(serial: Long, label: String) {
-     *  就地改签并与上方同人并回、清理快镜像占位编号。主线程执行。 */
+        if (serial != switchSerial) return
-    private fun revertOnsetSwitch(firedLabel: String, prevActive: String?) {
+        switchSerial++          // 关闭本切次命名窗口
-        if (prevActive == null) return   // 无旧主可还原(会话极早期)→ 被动链
+        grayLinePending = false
         val bottom = subtitleLines.lastOrNull()
-        val pending = pendingOnsetLabel
+        if (bottom != null && bottom.open && bottom.label == null) {
-        val inFlight = pending == firedLabel ||
+            bottom.label = label
-                (bottom != null && bottom.label == firedLabel && bottom.open)
+            bottom.colorIdx = colorIdxFor(label)
-        if (!inFlight) return            // 状态已走远(连环切换等)→ 交给被动链
+            notifyLine(bottom)
-        if (pending == firedLabel && bottom != null &&
+            Log.i(TAG, "SWITCH-LABEL serial=$serial label=$label (line)")
-            bottom.label != firedLabel
+        } else {
-        ) {
+            pendingOnsetLabel = label
-            // 占位行尚未建立(补喂机制下多数如此):抹掉切换痕迹——预置标签
+            pendingOnsetLabelAt = SystemClock.elapsedRealtime()
-            // 作废、重开旧底行,同人续说零断行,观感上从未切过
+            Log.i(TAG, "SWITCH-LABEL serial=$serial label=$label (preset)")
-            pendingOnsetLabel = null
-            onsetClosePending = false    // 防在途定格回来补封行
-            if (!bottom.open) bottom.open = true
-            lastConfirmedLabel = prevActive
-            SpeakerRecognition.fastRegistry.removeAuto(firedLabel)
-            Log.i(TAG, "SWITCH-REVERT(pre-line) $firedLabel -> $prevActive")
-            return
         }
-        // 占位行已建立:就地改签 + 与上方同人并回
+        lastConfirmedLabel = label
+    }
+
+    /** 误切撤销(方案三版,主线程):灰行未建立→重开旧行抹迹;已建立→改签并回 */
+    private fun undoSwitch(serial: Long) {
+        if (serial != switchSerial) return
+        switchSerial++
+        val prevActive = switchPrevActive ?: return
+        grayLinePending = false
         pendingOnsetLabel = null
+        onsetClosePending = false
         lastConfirmedLabel = prevActive
-        if (bottom != null && bottom.label == firedLabel) {
+        val bottom = subtitleLines.lastOrNull() ?: return
+        when {
+            bottom.open && bottom.label == null -> {
                 bottom.label = prevActive
                 bottom.colorIdx = colorIdxFor(prevActive)
                 val merged = mergeLineIntoPrevIfSame(bottom, prevActive)
                 if (!merged) notifyLine(bottom)
+                Log.i(TAG, "SWITCH-UNDO(line) serial=$serial -> $prevActive")
+            }
+            !bottom.open -> {
+                bottom.open = true
+                Log.i(TAG, "SWITCH-UNDO(pre-line) serial=$serial -> $prevActive")
+            }
+            else -> Log.i(TAG, "SWITCH-UNDO skipped serial=$serial (state moved)")
         }
-        SpeakerRecognition.fastRegistry.removeAuto(firedLabel)
-        Log.i(TAG, "SWITCH-REVERT(line) $firedLabel -> $prevActive (active-heal)")
     }
 
     private fun appendNewLine(label: String?): SubtitleLine {
@@ -1905,9 +1939,15 @@ class MainActivity : AppCompatActivity() {
             SystemClock.elapsedRealtime() - pendingOnsetLabelAt < 5_000L
         ) {
             pendingOnsetLabel = null
+            grayLinePending = false
             lastConfirmedLabel = preset
             eff = preset
             Log.i(TAG, "ONSET-LINE new line label=$preset")
+        } else if (grayLinePending) {
+            // 方案三:切后命名未落定 → 灰行先开(未识别),名字稍后补
+            grayLinePending = false
+            eff = null
+            Log.i(TAG, "ONSET-LINE new line gray (naming pending)")
         } else {
             if (preset != null) {
                 pendingOnsetLabel = null