- shared_ptr<AudioBuffers> L = _left.run (in_L);
- shared_ptr<AudioBuffers> R = _right.run (in_R);
- shared_ptr<AudioBuffers> C = _centre.run (in_LR);
- shared_ptr<AudioBuffers> Lfe = _lfe.run (in_LR);
- shared_ptr<AudioBuffers> Ls = _ls.run (in_L);
- shared_ptr<AudioBuffers> Rs = _rs.run (in_R);
-
- shared_ptr<AudioBuffers> out (new AudioBuffers (6, in->frames ()));
- out->copy_channel_from (L.get(), 0, 0);
- out->copy_channel_from (R.get(), 0, 1);
- out->copy_channel_from (C.get(), 0, 2);
- out->copy_channel_from (Lfe.get(), 0, 3);
- out->copy_channel_from (Ls.get(), 0, 4);
- out->copy_channel_from (Rs.get(), 0, 5);
+ vector<shared_ptr<AudioBuffers>> all_out;
+ all_out.push_back (_left.run(in_L));
+ all_out.push_back (_right.run(in_R));
+ all_out.push_back (_centre.run(in_LR));
+ all_out.push_back (_lfe.run(in_LR));
+ all_out.push_back (_ls.run(in_L));
+ all_out.push_back (_rs.run(in_R));
+
+ auto out = make_shared<AudioBuffers>(channels, in->frames());
+ int const N = min (channels, 6);
+
+ for (int i = 0; i < N; ++i) {
+ out->copy_channel_from (all_out[i].get(), 0, i);
+ }
+
+ for (int i = N; i < channels; ++i) {
+ out->make_silent (i);
+ }
+