diff options
| author | Robin Gareus <robin@gareus.org> | 2015-04-29 21:27:03 +0200 |
|---|---|---|
| committer | Robin Gareus <robin@gareus.org> | 2015-04-29 21:27:37 +0200 |
| commit | e3cd57ecb634af33a6a86eb1ed57e270eddb1421 (patch) | |
| tree | c9cc28b8bb63085d330604310b532a42e83e1ea6 /libs/backends/dummy/dummy_audiobackend.cc | |
| parent | 729bc00f13fcad4ed986c3e5cf4565fd4ce0dead (diff) | |
DSP load calculation: favor peak over average.
Diffstat (limited to 'libs/backends/dummy/dummy_audiobackend.cc')
| -rw-r--r-- | libs/backends/dummy/dummy_audiobackend.cc | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc index 050e99435c..1ba91f39dd 100644 --- a/libs/backends/dummy/dummy_audiobackend.cc +++ b/libs/backends/dummy/dummy_audiobackend.cc @@ -1224,7 +1224,7 @@ DummyAudioBackend::main_process_thread () } if (!_freewheel) { - const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate; + const int64_t nominal_time = 1e6 * _samples_per_period / _samplerate; clock2 = _x_get_monotonic_usec(); #ifdef PLATFORM_WINDOWS bool win_timers_ok = true; @@ -1234,7 +1234,7 @@ DummyAudioBackend::main_process_thread () * (4 * nominal cycle time) and simply ignore cases where the * execution switches cores. */ - if (clock1 < 0 || clock2 < 0 || (clock1 > clock2) || (clock2 - clock1) > 4 * nomial_time) { + if (clock1 < 0 || clock2 < 0 || (clock1 > clock2) || (clock2 - clock1) > 4 * nominal_time) { clock2 = clock1 = 0; win_timers_ok = false; } @@ -1244,11 +1244,17 @@ DummyAudioBackend::main_process_thread () if (win_timers_ok) #endif { // low pass filter - _dsp_load = _dsp_load + .05 * ((elapsed_time / (float) nomial_time) - _dsp_load) + 1e-12; + const float load = elapsed_time / (float) nominal_time; + if (load > _dsp_load) { + _dsp_load = load; + } else { + const float a = .1 * _samples_per_period / _samplerate; + _dsp_load = _dsp_load + a * (load - _dsp_load) + 1e-12; + } } - if (elapsed_time < nomial_time) { - Glib::usleep (nomial_time - elapsed_time); + if (elapsed_time < nominal_time) { + Glib::usleep (nominal_time - elapsed_time); } else { Glib::usleep (100); // don't hog cpu } |