diff options
| -rw-r--r-- | libs/backends/dummy/dummy_audiobackend.cc | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc index 4d19dca9dd..a42f3dbade 100644 --- a/libs/backends/dummy/dummy_audiobackend.cc +++ b/libs/backends/dummy/dummy_audiobackend.cc @@ -1174,7 +1174,7 @@ DummyAudioBackend::main_process_thread () manager.graph_order_callback(); int64_t clock1, clock2; - clock1 = _x_get_monotonic_usec(); + clock1 = -1; while (_running) { if (_freewheeling != _freewheel) { @@ -1226,8 +1226,8 @@ DummyAudioBackend::main_process_thread () if (!_freewheel) { const int64_t nominal_time = 1e6 * _samples_per_period / _samplerate; clock2 = _x_get_monotonic_usec(); -#ifdef PLATFORM_WINDOWS - bool win_timers_ok = true; + bool timers_ok = true; + /* querying the performance counter can fail occasionally (-1). * Also on some multi-core systems, timers are CPU specific and not * synchronized. We assume they differ more than a few milliseconds @@ -1235,14 +1235,14 @@ DummyAudioBackend::main_process_thread () * execution switches cores. */ if (clock1 < 0 || clock2 < 0 || (clock1 > clock2) || (clock2 - clock1) > 4 * nominal_time) { - clock2 = clock1 = 0; - win_timers_ok = false; + clock1 = 0; + clock2 = nominal_time; + timers_ok = false; } -#endif + const int64_t elapsed_time = clock2 - clock1; -#ifdef PLATFORM_WINDOWS - if (win_timers_ok) -#endif + + if (timers_ok) { // low pass filter const float load = elapsed_time / (float) nominal_time; if (load > _dsp_load) { @@ -1263,7 +1263,7 @@ DummyAudioBackend::main_process_thread () Glib::usleep (100); // don't hog cpu } - /* beginning of netx cycle */ + /* beginning of next cycle */ clock1 = _x_get_monotonic_usec(); bool connections_changed = false; |