From 91478e259355cbcd1baf2eada542464625028c41 Mon Sep 17 00:00:00 2001
From: evgeny <evgeny@adaptto.ru>
Date: Tue, 20 Oct 2026 01:22:52 +0200
Subject: [PATCH] Warm Android video codecs in the background and accelerate
 probe tails

---
 .../main/java/com/utun/chat/ChatApplication.kt   | 16 ++++++++++++++--
 .../java/com/utun/chat/data/CallVideoCodec.kt    |  5 ++++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/ChatApplication.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/ChatApplication.kt
index 3f54c532..f9bdaf95 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/ChatApplication.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/ChatApplication.kt
@@ -13,6 +13,7 @@ import com.utun.chat.data.IncomingCallManager
 import com.utun.chat.data.TelecomCallManager
 import com.utun.chat.data.ChatEventCallback
 import com.utun.chat.data.CallController
+import com.utun.chat.data.CallVideoCodec
 import com.utun.chat.data.AvatarRepository
 import com.utun.chat.data.MemberFilesRepository
 import kotlinx.coroutines.flow.MutableSharedFlow
@@ -92,8 +93,19 @@ class ChatApplication : Application() {
         TelecomCallManager.init()
         CallController.init()
         com.utun.chat.data.PhoneStateMonitor.init()
-
-
+        // Только тестовые codec кадры: разрешения камеры, Activity, Surface и сеть не нужны.
+        Thread({
+            val started = System.nanoTime()
+            LogManager.addLog("INFO", "call", "video codec background preparation begin; camera and network unused")
+            try {
+                val decoders = CallVideoCodec.probeDecoders()
+                val encoders = CallVideoCodec.probe()
+                LogManager.addLog("INFO", "call", "video codec background preparation complete " +
+                    "elapsedMs=${(System.nanoTime() - started) / 1_000_000} decodeCodecs=${decoders.size} encodeCodecs=${encoders.size}")
+            } catch (e: Exception) {
+                LogManager.addLog("ERROR", "call", "video codec background preparation failed: ${e.message}")
+            }
+        }, "call-video-probe").start()
     }
 
     companion object {
diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallVideoCodec.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallVideoCodec.kt
index 25ab7b53..393fba4e 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallVideoCodec.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallVideoCodec.kt
@@ -392,7 +392,8 @@ internal class CallVideoCodec(requested: CallVideoFormat, bitrate: Int, val name
                 var sent = 0; var decoded = 0; var pipeline = 0
                 val info = MediaCodec.BufferInfo(); val started = System.nanoTime(); val deadline = started + 2_000_000_000
                 while (decoded < packets.size && System.nanoTime() < deadline && keepRunning()) {
-                    if (sent < packets.size && (!paced || System.nanoTime() - started >= sent * 1_000_000_000L / f.fps)) {
+                    // Измеряем pipeline с исходной частотой до первого выхода, затем проверяем весь хвост без пауз.
+                    if (sent < packets.size && (!paced || decoded > 0 || System.nanoTime() - started >= sent * 1_000_000_000L / f.fps)) {
                         val i = decoder.dequeueInputBuffer(0)
                         if (i >= 0) {
                             val p = packets[sent++]; val data = if (p.key) type.unpackKey(p.bytes).second else p.bytes
@@ -410,6 +411,8 @@ internal class CallVideoCodec(requested: CallVideoFormat, bitrate: Int, val name
                 }
                 check(keepRunning()) { "Decoder probe cancelled" }
                 check(decoded == packets.size) { "Decoder did not return all probe frames $decoded/${packets.size}" }
+                if (paced) LogManager.addLog("DEBUG", "call", "video decoder probe name=$name inputs=$sent outputs=$decoded " +
+                    "pipeline=$pipeline elapsedMs=${(System.nanoTime() - started) / 1_000_000}")
                 decoder.stop(); return pipeline
             } finally { decoder.release() }
         }