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implement samples_since cycle start.

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This commit is contained in:
Robin Gareus 2015-03-09 16:59:59 +01:00
parent e243d328a4
commit 0446ff64f4
4 changed files with 29 additions and 12 deletions
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27
libs/backends/coreaudio/coreaudio_backend.cc
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@ -90,6 +90,7 @@ CoreAudioBackend::CoreAudioBackend (AudioEngine& e, AudioBackendInfo& info)
, _freewheel_ack (false)
, _reinit_thread_callback (false)
, _measure_latency (false)
, _last_process_start (0)
, _audio_device("")
, _midi_driver_option(_("None"))
, _samplerate (48000)
@ -416,10 +417,10 @@ static void * pthread_freewheel (void *arg)
return 0;
}
static int process_callback_ptr (void *arg)
static int process_callback_ptr (void *arg, const uint32_t n_samples, const uint64_t host_time)
{
CoreAudioBackend *d = static_cast<CoreAudioBackend*> (arg);
return d->process_callback();
return d->process_callback(n_samples, host_time);
}
int
@ -452,6 +453,7 @@ CoreAudioBackend::_start (bool for_latency_measurement)
_freewheel_ack = false;
_reinit_thread_callback = true;
_last_process_start = 0;
_pcmio->set_error_callback (error_callback_ptr, this);
_pcmio->set_buffer_size_callback (buffer_size_callback_ptr, this);
@ -648,7 +650,16 @@ CoreAudioBackend::sample_time_at_cycle_start ()
pframes_t
CoreAudioBackend::samples_since_cycle_start ()
{
return 0;
if (!_active_ca || !_run || _freewheeling || _freewheel) {
return 0;
}
if (_last_process_start == 0) {
return 0;
}
const uint64_t now = AudioGetCurrentHostTime ();
const int64_t elapsed_time_ns = AudioConvertHostTimeToNanos(now - _last_process_start);
return std::max((pframes_t)0, (pframes_t)rint(1e-9 * elapsed_time_ns * _samplerate));
}
uint32_t
@ -1503,6 +1514,7 @@ CoreAudioBackend::freewheel_thread ()
static_cast<CoreMidiBuffer*>((*it)->get_buffer(0))->clear ();
}
_last_process_start = 0;
if (engine.process_callback (_samples_per_period)) {
pthread_mutex_unlock (&_process_callback_mutex);
break;
@ -1525,7 +1537,7 @@ CoreAudioBackend::freewheel_thread ()
}
int
CoreAudioBackend::process_callback ()
CoreAudioBackend::process_callback (const uint32_t n_samples, const uint64_t host_time)
{
uint32_t i = 0;
uint64_t clock1, clock2;
@ -1548,6 +1560,10 @@ CoreAudioBackend::process_callback ()
if (pthread_mutex_trylock (&_process_callback_mutex)) {
// block while devices are added/removed
#ifndef NDEBUG
printf("Xrun due to device change\n");
#endif
engine.Xrun();
return 1;
}
@ -1560,8 +1576,6 @@ CoreAudioBackend::process_callback ()
/* port-connection change */
pre_process();
const uint32_t n_samples = _pcmio->n_samples();
// cycle-length in usec
const int64_t nominal_time = 1e6 * n_samples / _samplerate;
@ -1595,6 +1609,7 @@ CoreAudioBackend::process_callback ()
}
_midiio->start_cycle();
_last_process_start = host_time;
if (engine.process_callback (n_samples)) {
fprintf(stderr, "ENGINE PROCESS ERROR\n");