When creating a fake master card frame, create some fake silence with it.

[nageru] / nageru / mixer.cpp

diff --git a/nageru/mixer.cpp b/nageru/mixer.cpp
index 827ab9fd9dfa4b41ca31649d7dcd6cb0d09c9434..c6f126fc6682ef78fa23757205a4ceaff0a36526 100644 (file)
--- a/nageru/mixer.cpp
+++ b/nageru/mixer.cpp
@@ -631,9 +631,7 @@ void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, CardT
                assert(card_type == CardType::FFMPEG_INPUT);
        }
 
-       DeviceSpec device;
-       device = DeviceSpec{InputSourceType::CAPTURE_CARD, card_index};
-       audio_mixer->reset_resampler(device);
+       DeviceSpec device{InputSourceType::CAPTURE_CARD, card_index};
        unsigned num_channels = card_type == CardType::LIVE_CARD ? 8 : 2;
        if (is_active) {
                audio_mixer->set_device_parameters(device, card->capture->get_description(), card_type, num_channels, /*active=*/true);
@@ -643,6 +641,7 @@ void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, CardT
                snprintf(name, sizeof(name), "Fake card %u", card_index + 1);
                audio_mixer->set_device_parameters(device, name, card_type, num_channels, /*active=*/false);
        }
+       audio_mixer->reset_resampler(device);
        audio_mixer->trigger_state_changed_callback();
 
        // Unregister old metrics, if any.
@@ -1490,6 +1489,10 @@ start:
                                return !cards[master_card_index].new_frames.empty() ||
                                        cards[master_card_index].capture->get_disconnected();
                        });
+               if (timed_out) {
+                       fprintf(stderr, "WARNING: Master card (%s) did not deliver a frame for 100 ms, creating a fake one.\n",
+                               description_for_card(master_card_index).c_str());
+               }
        }
 
        if (timed_out) {
@@ -1573,6 +1576,14 @@ start:
        fractional_samples = num_samples_times_timebase % TIMEBASE;
        assert(output_frame_info.num_samples >= 0);
 
+       if (timed_out) {
+               DeviceSpec device{InputSourceType::CAPTURE_CARD, master_card_index};
+               bool success;
+               do {
+                       success = audio_mixer->add_silence(device, output_frame_info.num_samples, /*dropped_frames=*/0);
+               } while (!success);
+       }
+
        return output_frame_info;
 }