From 83ea839d0c297cdee3ba3d1af64b08e707e86d75 Mon Sep 17 00:00:00 2001
From: evgeny <evgeny@adaptto.ru>
Date: Thu, 29 Oct 2026 00:35:28 +0100
Subject: [PATCH] Recognize shared preview sources and model texture cleanup
 failures

---
 .../java/com/utun/chat/data/StreamCaptureEngine.kt |  4 +++-
 .../main/kotlin/android/graphics/SurfaceTexture.kt | 14 ++++++++++++++
 .../src/main/kotlin/android/view/Surface.kt        |  3 ++-
 3 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100644 tools/chatgui-android/video-tests/src/main/kotlin/android/graphics/SurfaceTexture.kt

diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureEngine.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureEngine.kt
index bf6d816d..e9441e08 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureEngine.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureEngine.kt
@@ -107,8 +107,10 @@ class StreamCaptureEngine(
     fun start() {
         preview.bind { target ->
             if (!handler.post {
+                if (target?.released == true) { LogManager.addLog("WARN", "video", "cancelled preview command id=$id"); return@post }
                 if (stopping || stopped || terminalFailure) { target?.release(); return@post }
-                if (target === previewTarget) { target?.release(); return@post }
+                if (target == null && previewTarget == null) return@post
+                if (target?.sameSource(previewTarget) == true) { target.release(); return@post }
                 val previous = previewTarget; previewTarget = target; previous?.release()
                 val config = activeConfig; val device = camera
                 LogManager.videoTrace("preview output change id=$id target=${target?.let(System::identityHashCode)} " +
diff --git a/tools/chatgui-android/video-tests/src/main/kotlin/android/graphics/SurfaceTexture.kt b/tools/chatgui-android/video-tests/src/main/kotlin/android/graphics/SurfaceTexture.kt
new file mode 100644
index 00000000..23aca170
--- /dev/null
+++ b/tools/chatgui-android/video-tests/src/main/kotlin/android/graphics/SurfaceTexture.kt
@@ -0,0 +1,14 @@
+package android.graphics
+
+/** Только JVM: физический texture descriptor и отказ до/после release. */
+class SurfaceTexture(val id: Int) {
+    var released = false
+        private set
+    var releaseCalls = 0
+        private set
+    var failures = emptySet<String>()
+    fun release() {
+        releaseCalls++; check("release" !in failures) { "texture release failed" }
+        released = true; check("release after" !in failures) { "texture release failed after effect" }
+    }
+}
diff --git a/tools/chatgui-android/video-tests/src/main/kotlin/android/view/Surface.kt b/tools/chatgui-android/video-tests/src/main/kotlin/android/view/Surface.kt
index d7cf3427..8aec27d5 100644
--- a/tools/chatgui-android/video-tests/src/main/kotlin/android/view/Surface.kt
+++ b/tools/chatgui-android/video-tests/src/main/kotlin/android/view/Surface.kt
@@ -1,7 +1,8 @@
 package android.view
 
 /** Только дескриптор вывода; реальных EGL/TextureView/драйверов нет. */
-class Surface {
+class Surface() {
+    constructor(texture: android.graphics.SurfaceTexture) : this()
     @Volatile var isValid = true
     var releaseCalls = 0
         private set