Improve ANSCV

MediaClient/media/video_decoder.cpp

@@ -332,8 +332,28 @@ void CVideoDecoder::uninit()
 {
     std::lock_guard<std::recursive_mutex> lock(_mutex);
 
+    // [MEDIA_DecClose] heartbeat — paired with [MEDIA_DecInit] for leak diagnosis.
+    // Pair count over a long run reveals whether avcodec_open2 calls are
+    // matched by full teardowns. If close-count < init-count, the FFmpeg
+    // codec context (and its custom get_buffer2 arena) is leaking per reopen.
+    {
+        static std::atomic<uint64_t> s_closeCount{0};
+        const uint64_t n = s_closeCount.fetch_add(1) + 1;
+        ANS_DBG("MEDIA_DecClose",
+            "uninit ENTRY #%llu inited=%d codec=%s %dx%d hwEnabled=%d cudaHW=%d gpu=%d (this=%p)",
+            (unsigned long long)n,
+            (int)m_bInited,
+            (m_pCodec && m_pCodec->name) ? m_pCodec->name : "?",
+            m_pContext ? m_pContext->width  : 0,
+            m_pContext ? m_pContext->height : 0,
+            (int)m_bHardwareDecoderEnabled,
+            (int)m_bCudaHWAccel,
+            m_hwGpuIndex,
+            (void*)this);
+    }
+
     // Stop processing first
-    // Backup first 
+    // Backup first
 	BOOL wasRunning = m_bRunning;
     m_bRunning = FALSE;