Keep adaptive requests above baseline and test backend fault events

tools/chatgui/tests/test_audio_timing.c

@@ -6,6 +6,15 @@
 static int64_t times[64];
 static unsigned counts[64], seen;
 static int capture_missing;
+static unsigned overruns, underruns;
+static void notification(const ma_device_notification* event) {
+    if (event->type == ma_device_notification_type_capture_overrun) overruns++;
+    if (event->type == ma_device_notification_type_playback_underrun) underruns++;
+}
+static int fake_hole(const void* stream, const void** data, size_t* bytes) {
+    (void)stream; *data = NULL; *bytes = 64 * 2 * sizeof(float); return 0;
+}
+static int fake_drop(void* stream) { (void)stream; return 0; }
 static int fake_latency(const void* stream, uint64_t* latency, int* negative) {
     (void)stream; *latency = 100000; *negative = 0; return 0;
 }
@@ -52,6 +61,16 @@ int main(void) {
     after = time_us();
     assert(seen == 1 && times[0] >= now - 100000 + 2500 && times[0] <= after - 100000 + 2500);
     assert(!audio_stream_capture_missing(&device)); // Hint действует только внутри dispatch.
+    device.onNotification = notification;
+    ma_device__set_state(&device, ma_device_state_started);
+    context.pulse.pa_stream_peek = (ma_proc)fake_hole; context.pulse.pa_stream_drop = (ma_proc)fake_drop;
+    seen = 0;
+    ma_device_on_read__pulse(device.pulse.pStreamCapture, 64 * 2 * sizeof(float), &device);
+    assert(overruns == 1 && underruns == 0 && seen == 4); // Один hole, четыре converter callbacks.
+    audio_diag_pulse_overflow(device.pulse.pStreamCapture, &device);
+    assert(overruns == 2 && underruns == 0);
+    audio_diag_pulse_underflow(NULL, &device);
+    assert(overruns == 2 && underruns == 1);
     ma_data_converter_uninit(&device.capture.converter, NULL);
-    puts("audio timing: capture read index, converter offsets, explicit hole PASS");
+    puts("audio timing: capture read index, converter offsets, hole/overrun/underrun notifications PASS");
 }