More splitting of functions out of thread_func().

[nageru] / mixer.cpp

diff --git a/mixer.cpp b/mixer.cpp
index e04b36dde7e6b0f0f4e26db4085f97c91d1f7429..5325437e0fddaa56d3044ad206b144340f696eee 100644 (file)
--- a/mixer.cpp
+++ b/mixer.cpp
@@ -605,42 +605,10 @@ void Mixer::thread_func()
                bool has_new_frame[MAX_CARDS] = { false };
                int num_samples[MAX_CARDS] = { 0 };
 
-               // The first card is the master timer, so wait for it to have a new frame.
                // TODO: Make configurable, and with a timeout.
                unsigned master_card_index = 0;
 
-               {
-                       unique_lock<mutex> lock(bmusb_mutex);
-
-                       cards[master_card_index].new_frames_changed.wait(lock, [this, master_card_index]{ return !cards[master_card_index].new_frames.empty(); });
-
-                       for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
-                               CaptureCard *card = &cards[card_index];
-                               if (card->new_frames.empty()) {
-                                       assert(card_index != master_card_index);
-                                       card->queue_length_policy.update_policy(-1);
-                                       continue;
-                               }
-                               new_frames[card_index] = move(card->new_frames.front());
-                               has_new_frame[card_index] = true;
-                               card->new_frames.pop();
-                               card->new_frames_changed.notify_all();
-
-                               int num_samples_times_timebase = OUTPUT_FREQUENCY * new_frames[card_index].length + card->fractional_samples;
-                               num_samples[card_index] = num_samples_times_timebase / TIMEBASE;
-                               card->fractional_samples = num_samples_times_timebase % TIMEBASE;
-                               assert(num_samples[card_index] >= 0);
-
-                               if (card_index != master_card_index) {
-                                       // If we have excess frames compared to the policy for this card,
-                                       // drop frames from the head.
-                                       card->queue_length_policy.update_policy(card->new_frames.size());
-                                       while (card->new_frames.size() > card->queue_length_policy.get_safe_queue_length()) {
-                                               card->new_frames.pop();
-                                       }
-                               }
-                       }
-               }
+               get_one_frame_from_each_card(master_card_index, new_frames, has_new_frame, num_samples);
 
                // Resample the audio as needed, including from previously dropped frames.
                assert(num_cards > 0);
@@ -660,18 +628,7 @@ void Mixer::thread_func()
                        }
                }
 
-               if (audio_level_callback != nullptr) {
-                       unique_lock<mutex> lock(compressor_mutex);
-                       double loudness_s = r128.loudness_S();
-                       double loudness_i = r128.integrated();
-                       double loudness_range_low = r128.range_min();
-                       double loudness_range_high = r128.range_max();
-
-                       audio_level_callback(loudness_s, 20.0 * log10(peak),
-                                            loudness_i, loudness_range_low, loudness_range_high,
-                                            gain_staging_db, 20.0 * log10(final_makeup_gain),
-                                            correlation.get_correlation());
-               }
+               send_audio_level_callback();
 
                for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
                        if (card_index == master_card_index || !has_new_frame[card_index]) {
@@ -752,6 +709,40 @@ void Mixer::thread_func()
        resource_pool->clean_context();
 }
 
+void Mixer::get_one_frame_from_each_card(unsigned master_card_index, CaptureCard::NewFrame new_frames[MAX_CARDS], bool has_new_frame[MAX_CARDS], int num_samples[MAX_CARDS])
+{
+       // The first card is the master timer, so wait for it to have a new frame.
+       unique_lock<mutex> lock(bmusb_mutex);
+       cards[master_card_index].new_frames_changed.wait(lock, [this, master_card_index]{ return !cards[master_card_index].new_frames.empty(); });
+
+       for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+               CaptureCard *card = &cards[card_index];
+               if (card->new_frames.empty()) {
+                       assert(card_index != master_card_index);
+                       card->queue_length_policy.update_policy(-1);
+                       continue;
+               }
+               new_frames[card_index] = move(card->new_frames.front());
+               has_new_frame[card_index] = true;
+               card->new_frames.pop();
+               card->new_frames_changed.notify_all();
+
+               int num_samples_times_timebase = OUTPUT_FREQUENCY * new_frames[card_index].length + card->fractional_samples;
+               num_samples[card_index] = num_samples_times_timebase / TIMEBASE;
+               card->fractional_samples = num_samples_times_timebase % TIMEBASE;
+               assert(num_samples[card_index] >= 0);
+
+               if (card_index != master_card_index) {
+                       // If we have excess frames compared to the policy for this card,
+                       // drop frames from the head.
+                       card->queue_length_policy.update_policy(card->new_frames.size());
+                       while (card->new_frames.size() > card->queue_length_policy.get_safe_queue_length()) {
+                               card->new_frames.pop();
+                       }
+               }
+       }
+}
+
 void Mixer::render_one_frame()
 {
        // Get the main chain from the theme, and set its state immediately.
@@ -813,6 +804,24 @@ void Mixer::render_one_frame()
        }
 }
 
+void Mixer::send_audio_level_callback()
+{
+       if (audio_level_callback == nullptr) {
+               return;
+       }
+
+       unique_lock<mutex> lock(compressor_mutex);
+       double loudness_s = r128.loudness_S();
+       double loudness_i = r128.integrated();
+       double loudness_range_low = r128.range_min();
+       double loudness_range_high = r128.range_max();
+
+       audio_level_callback(loudness_s, 20.0 * log10(peak),
+               loudness_i, loudness_range_low, loudness_range_high,
+               gain_staging_db, 20.0 * log10(final_makeup_gain),
+               correlation.get_correlation());
+}
+
 void Mixer::audio_thread_func()
 {
        while (!should_quit) {