radio: keep drain diagnostics at burst boundaries and test queued PCM

tools/chatgui/tests/test_voice_tx.cpp

@@ -303,8 +303,10 @@ static void test_vad_receive_guard(UTUN_INSTANCE* instance) {
     std::array<int16_t, 3072> speech; speech.fill(1200);
     uint8_t opus[256]; int len = opus_codec_encode(encoder, speech.data(), 960, opus, sizeof(opus)); REQUIRE(len > 0);
     opus_codec_encoder_destroy(encoder);
-    auto receive = [&](uint64_t source, int fin) {
-        radio_audio_on_frame(instance, 7, source, 1, fin ? 1 : 0, fin, fin ? nullptr : opus, fin ? 0 : len, nullptr);
+    auto receive = [&](uint64_t source, int fin, uint16_t first = 0) {
+        if (fin) radio_audio_on_frame(instance, 7, source, 1, first + 8, 1, nullptr, 0, nullptr);
+        else for (int i = 0; i < 8; ++i)
+            radio_audio_on_frame(instance, 7, source, 1, first + i, 0, opus, len, nullptr);
     };
     auto feed = [&] { REQUIRE(radio_audio_feed_pcm(7, speech.data(), speech.size()) == 0); };
     uint64_t pulled = 0;
@@ -325,7 +327,7 @@ static void test_vad_receive_guard(UTUN_INSTANCE* instance) {
     test_time += 3000; feed(); REQUIRE(!radio_audio_transmitting() && vad_windows == before);
     receive(42, 1); drain(); radio_audio_playback_progress(7, pulled, 0);
     test_time += 3000; feed(); REQUIRE(!radio_audio_transmitting()); // Второй пир всё ещё говорит.
-    receive(43, 1); drain();
+    receive(43, 0, 8); receive(43, 1, 8); drain();
     test_time += 10000; feed(); REQUIRE(!radio_audio_transmitting()); // PCM ещё не дошёл до выхода.
     radio_audio_playback_progress(7, pulled, 500); // Desktop: последние 50мс ещё в устройстве.
     test_time += 2499; feed(); REQUIRE(!radio_audio_transmitting() && vad_windows == before);