From 79760d1b2ef98a8f24dd01fa0a9fab747228d06e Mon Sep 17 00:00:00 2001
From: duffyduck <info@hacker-net.de>
Date: Sun, 10 May 2026 14:11:53 +0200
Subject: [PATCH] =?UTF-8?q?fix(audio):=20kurze=20TTS-Texte=20spielen=20wie?=
 =?UTF-8?q?der=20ab=20=E2=80=94=20AudioTrack-Buffer=20entkoppelt=20von=20P?=
 =?UTF-8?q?reroll?=
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OnePlus A12 stallte bei kurzem Text mit pos=0/34112: 336KB Buffer fuer
3.5s Preroll, aber nur 68KB Daten drin → AudioTrack faehrt nicht an.

Fix: Buffer fest auf ~2s, plus play()-Retry bei pos=0 nach 500ms.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 .../com/ariacockpit/PcmStreamPlayerModule.kt   | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/android/android/app/src/main/java/com/ariacockpit/PcmStreamPlayerModule.kt b/android/android/app/src/main/java/com/ariacockpit/PcmStreamPlayerModule.kt
index dc7e63e..2c44c18 100644
--- a/android/android/app/src/main/java/com/ariacockpit/PcmStreamPlayerModule.kt
+++ b/android/android/app/src/main/java/com/ariacockpit/PcmStreamPlayerModule.kt
@@ -78,9 +78,12 @@ class PcmStreamPlayerModule(reactContext: ReactApplicationContext) : ReactContex
             val encoding = AudioFormat.ENCODING_PCM_16BIT
             val minBuf = AudioTrack.getMinBufferSize(sampleRate, channelConfig, encoding)
             val bytesPerSecond = sampleRate * channels * 2 // 16-bit = 2 bytes
-            // Buffer muss mindestens PREROLL + etwas Spielraum fassen.
             val prerollTarget = (bytesPerSecond * prerollSec).toInt()
-            val bufferSize = (minBuf * 32).coerceAtLeast(prerollTarget * 2)
+            // Buffer entkoppelt von Preroll — fester ~2s-Buffer reicht. Wenn er
+            // an Preroll gekoppelt ist (z.B. 7s bei preroll=3.5s) und nur kurz
+            // gefuettert wird, stallt AudioTrack auf manchen Geraeten (OnePlus
+            // Android 12: pos bleibt 0 obwohl play() lief).
+            val bufferSize = (bytesPerSecond * 2).coerceAtLeast(minBuf * 8)
             prerollBytes = prerollTarget
             bytesBuffered = 0
             playbackStarted = false
@@ -237,12 +240,21 @@ class PcmStreamPlayerModule(reactContext: ReactApplicationContext) : ReactContex
                         val totalFrames = (bytesBuffered / streamBytesPerFrame).toInt()
                         var lastPos = -1
                         var stalledCount = 0
+                        var retried = false
                         while (!writerShouldStop) {
                             val pos = t.playbackHeadPosition
                             if (pos >= totalFrames) break
-                            // Safety: wenn Position 2s nicht mehr vorwaerts → AudioTrack hing
                             if (pos == lastPos) {
                                 stalledCount++
+                                // Nach 500ms Stillstand: AudioTrack-Quirk auf manchen
+                                // Geraeten (OnePlus A12) — play() nochmal anstossen.
+                                if (stalledCount == 10 && pos == 0 && !retried) {
+                                    retried = true
+                                    Log.w(TAG, "playback nicht angefahren — retry play()")
+                                    try { t.play() } catch (e: Exception) {
+                                        Log.w(TAG, "retry play() failed: ${e.message}")
+                                    }
+                                }
                                 if (stalledCount > 40) {
                                     Log.w(TAG, "playback stalled at $pos/$totalFrames — give up")
                                     break