Some small restructuring in the audio code.

diff --git a/mixer.cpp b/mixer.cpp
index 5eca941860f73de3dec58ac5246c07dab9c04467..c0e8de46d18c558e6469a50cf8a10b9d085967de 100644 (file)
--- a/mixer.cpp
+++ b/mixer.cpp
@@ -520,25 +520,31 @@ void Mixer::thread_func()
 
 void Mixer::process_audio_one_frame()
 {
-       // TODO: Allow using audio from the other card(s) as well.
+       vector<float> samples_card;
        vector<float> samples_out;
        for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
-               samples_out.resize((48000 / 60) * 2);
+               samples_card.resize((48000 / 60) * 2);
                {
                        unique_lock<mutex> lock(cards[card_index].audio_mutex);
-                       if (!cards[card_index].resampler->get_output_samples(pts(), &samples_out[0], 48000 / 60)) {
+                       if (!cards[card_index].resampler->get_output_samples(pts(), &samples_card[0], 48000 / 60)) {
                                printf("Card %d reported previous underrun.\n", card_index);
                        }
                }
+               // TODO: Allow using audio from the other card(s) as well.
                if (card_index == 0) {
-                       vector<float> left, right;
-                       peak = std::max(peak, find_peak(samples_out));
-                       deinterleave_samples(samples_out, &left, &right);
-                       float *ptrs[] = { left.data(), right.data() };
-                       r128.process(left.size(), ptrs);
-                       h264_encoder->add_audio(pts_int, move(samples_out));
+                       samples_out = move(samples_card);
                }
        }
+
+       // Find peak and R128 levels.
+       peak = std::max(peak, find_peak(samples_out));
+       vector<float> left, right;
+       deinterleave_samples(samples_out, &left, &right);
+       float *ptrs[] = { left.data(), right.data() };
+       r128.process(left.size(), ptrs);
+
+       // Actually add the samples to the output.
+       h264_encoder->add_audio(pts_int, move(samples_out));
 }
 
 void Mixer::subsample_chroma(GLuint src_tex, GLuint dst_tex)