Preserve stream capture settings and refine audio playback

tools/chatgui/tests/test_stream_view.cpp

@@ -68,6 +68,8 @@ extern "C" void __wrap_avcodec_free_context(AVCodecContext** context) {
 #ifdef TEST_NULL_AUDIO
 static std::atomic<ma_device_data_proc> originalAudioCallback{nullptr};
 static std::atomic<uint64_t> nonzeroSamples{0};
+static std::atomic<uint64_t> silenceGaps{0};
+static unsigned silentRun = 0; // Только callback; счётчик промежутков >=1мс между тестовыми тонами.
 static std::atomic<uint64_t> leftEnergy{0}, rightEnergy{0};
 static std::atomic<int64_t> playbackDelayUs{0};
 extern "C" int64_t __real_audio_stream_frame_time(ma_device*, unsigned int, int*);
@@ -90,6 +92,8 @@ static void observeAudio(ma_device* device, void* out, const void* in, ma_uint32
         left += static_cast<int64_t>(pcm[2 * i]) * pcm[2 * i];
         right += static_cast<int64_t>(pcm[2 * i + 1]) * pcm[2 * i + 1];
         nonzero += pcm[2 * i] != 0; nonzero += pcm[2 * i + 1] != 0;
+        if (pcm[2 * i] || pcm[2 * i + 1]) silentRun = 0;
+        else if (++silentRun == 48) silenceGaps.fetch_add(1);
     }
     leftEnergy.fetch_add(left); rightEnergy.fetch_add(right); nonzeroSamples.fetch_add(nonzero);
 }
@@ -145,6 +149,10 @@ class StreamViewTest : public QObject {
 private slots:
     void initTestCase() {
         debug_config_init(); debug_set_level(DEBUG_LEVEL_WARN); debug_set_category_level(DEBUG_CATEGORY_STREAM, DEBUG_LEVEL_INFO);
+        if (qEnvironmentVariableIsSet("UTUN_TEST_DEBUG")) {
+            debug_set_category_level(DEBUG_CATEGORY_STREAM, DEBUG_LEVEL_TRACE);
+            debug_set_category_level(DEBUG_CATEGORY_DEBUG, DEBUG_LEVEL_TRACE);
+        }
         debug_set_category_level(DEBUG_CATEGORY_SYS, DEBUG_LEVEL_ERROR);
         allocations = u_get_allocated_count(); ua = uasync_create(); QVERIFY(ua);
         inst = utun_instance_create_from_str(ua,
@@ -266,8 +274,15 @@ private slots:
         });
         sender.start(100);
         QTRY_VERIFY_WITH_TIMEOUT(shown.count() > 0, 5000);
+        QTest::qWait(400); // Пройти старт декодера и физическую задержку тестового устройства.
+#ifdef TEST_NULL_AUDIO
+        uint64_t gapsBefore = silenceGaps.load();
+#endif
         int beforeSteady = shown.count(); QTest::qWait(1500);
         QVERIFY2(shown.count() >= beforeSteady + 30, "30fps video must keep advancing with 200ms physical audio latency");
+#ifdef TEST_NULL_AUDIO
+        QCOMPARE(silenceGaps.load(), gapsBefore);
+#endif
         int beforeSwitch = shown.count(); revision++; rotation = 270;
         QTRY_VERIFY_WITH_TIMEOUT(shown.count() > beforeSwitch + 2, 5000);
         stream_info switched{}; QCOMPARE(stream_get_info(publisher, &switched), STREAM_OK);