ardour/livetrax
13
0
Fork 0
Code

CoreAudio: use libardour provided DSP load calc.

Browse Source
This commit is contained in:
Robin Gareus 2015-09-16 17:36:01 +02:00
parent e125c78070
commit 1c43383e92
2 changed files with 8 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
libs/backends/coreaudio/coreaudio_backend.cc
View File

@ -701,7 +701,7 @@ CoreAudioBackend::freewheel (bool onoff)
float
CoreAudioBackend::dsp_load () const
{
return std::min(100.f, 100.f * _dsp_load);
return 100.f * _dsp_load;
}
size_t
@ -1718,7 +1718,7 @@ int
CoreAudioBackend::process_callback (const uint32_t n_samples, const uint64_t host_time)
{
uint32_t i = 0;
uint64_t clock1, clock2;
uint64_t clock1;
_active_ca = true;
@ -1846,16 +1846,10 @@ CoreAudioBackend::process_callback (const uint32_t n_samples, const uint64_t hos
_processed_samples += n_samples;
/* calc DSP load. */
clock2 = g_get_monotonic_time();
const int64_t elapsed_time = clock2 - clock1;
// low pass filter
const float load = elapsed_time / (float) nominal_time;
if (load > _dsp_load) {
_dsp_load = load;
} else {
const float a = .2 * _samples_per_period / _samplerate;
_dsp_load = _dsp_load + a * (load - _dsp_load) + 1e-12;
}
_dsp_load_calc.set_max_time (_samplerate, _samples_per_period);
_dsp_load_calc.set_start_timestamp_us (clock1);
_dsp_load_calc.set_stop_timestamp_us (g_get_monotonic_time());
_dsp_load = _dsp_load_calc.get_dsp_load ();
pthread_mutex_unlock (&_process_callback_mutex);
return 0;

2
libs/backends/coreaudio/coreaudio_backend.h
View File

@ -31,6 +31,7 @@
#include <boost/shared_ptr.hpp>
#include "ardour/audio_backend.h"
#include "ardour/dsp_load_calculator.h"
#include "ardour/types.h"
#include "coreaudio_pcmio.h"
@ -371,6 +372,7 @@ class CoreAudioBackend : public AudioBackend {
/* processing */
float _dsp_load;
ARDOUR::DSPLoadCalculator _dsp_load_calc;
uint64_t _processed_samples;
pthread_t _main_thread;