From e15b89af9889d94eca15380048fc2bf6bbc8e22e Mon Sep 17 00:00:00 2001
From: Tom Cooks <tommasogagliardi+github@gmail.com>
Date: Wed, 30 Sep 2026 08:11:24 -0400
Subject: Fix transcription: streaming resampler trim could overrun the buffer
 (1.3.1-alpha)

The resampler clamped nothing before Arrays.copyOfRange(buffer, drop, length),
so when the fractional read position overshot the buffer end, drop could be
length+1 and the copy threw IllegalArgumentException: 8194 > 8193. This broke
every transcription (base and tiny, any language). Clamp drop to buffer.length.
---
 app/build.gradle.kts                                         | 4 ++--
 app/src/main/java/com/wuhei/reccoon/TranscriptionEngine.java | 3 +++
 app/src/main/res/values/strings.xml                          | 2 +-
 3 files changed, 6 insertions(+), 3 deletions(-)

(limited to 'app')

diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index b1a0836..d57a7e6 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -15,8 +15,8 @@ android {
         applicationId = "com.wuhei.reccoon"
         minSdk = 26
         targetSdk = 35
-        versionCode = 4
-        versionName = "1.3.0-alpha"
+        versionCode = 5
+        versionName = "1.3.1-alpha"
 
         ndk {
             // Prebuilt sherpa-onnx / onnxruntime native libraries.
diff --git a/app/src/main/java/com/wuhei/reccoon/TranscriptionEngine.java b/app/src/main/java/com/wuhei/reccoon/TranscriptionEngine.java
index f4306ff..efee8dd 100644
--- a/app/src/main/java/com/wuhei/reccoon/TranscriptionEngine.java
+++ b/app/src/main/java/com/wuhei/reccoon/TranscriptionEngine.java
@@ -383,6 +383,9 @@ public final class TranscriptionEngine {
             }
 
             int drop = (int) position;
+            if (drop > buffer.length) {
+                drop = buffer.length;
+            }
             if (drop > 0) {
                 buffer = Arrays.copyOfRange(buffer, drop, buffer.length);
                 position -= drop;
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 54a69d9..dbd3535 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="app_name">RECCoon</string>
-    <string name="subtitle">by wuhei · v1.3.0-alpha</string>
+    <string name="subtitle">by wuhei · v1.3.1-alpha</string>
     <string name="timer_zero">00:00</string>
     <string name="footer">44.1 kHz · 16-bit · PCM (WAV) · cue markers</string>
 
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