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ALSA: ignore systemic MIDI latencies during measurement

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This commit is contained in:
Robin Gareus 2020-04-10 01:42:42 +02:00
parent a2f7abc70b
commit 62e2ec49ce
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 6 additions and 6 deletions
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12
libs/backends/alsa/alsa_audiobackend.cc
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@ -756,6 +756,8 @@ AlsaAudioBackend::_start (bool for_latency_measurement)
return BackendReinitializationError;
}
_measure_latency = for_latency_measurement;
clear_ports ();
/* reset internal state */
@ -901,8 +903,6 @@ AlsaAudioBackend::_start (bool for_latency_measurement)
PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
}
_measure_latency = for_latency_measurement;
register_system_midi_ports();
if (register_system_audio_ports()) {
@ -1187,7 +1187,7 @@ AlsaAudioBackend::register_system_audio_ports()
const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period;
/* audio ports */
lr.min = lr.max = (_systemic_audio_input_latency);
lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency);
for (int i = 1; i <= a_ins; ++i) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
@ -1199,7 +1199,7 @@ AlsaAudioBackend::register_system_audio_ports()
_system_inputs.push_back (ap);
}
lr.min = lr.max = lcpp + (_systemic_audio_output_latency);
lr.min = lr.max = lcpp + (_measure_latency ? 0 : _systemic_audio_output_latency);
for (int i = 1; i <= a_out; ++i) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
@ -1465,7 +1465,7 @@ AlsaAudioBackend::register_system_midi_ports(const std::string device)
delete mout;
} else {
LatencyRange lr;
lr.min = lr.max = (nfo->systemic_output_latency);
lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
set_latency_range (p, true, lr);
boost::dynamic_pointer_cast<AlsaMidiPort>(p)->set_n_periods(_periods_per_cycle); // TODO check MIDI alignment
BackendPortPtr ap = boost::dynamic_pointer_cast<BackendPort>(p);
@ -1513,7 +1513,7 @@ AlsaAudioBackend::register_system_midi_ports(const std::string device)
continue;
}
LatencyRange lr;
lr.min = lr.max = (nfo->systemic_input_latency);
lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
set_latency_range (p, false, lr);
BackendPortPtr ap = boost::dynamic_pointer_cast<BackendPort>(p);
ap->set_pretty_name (replace_name_io (i->first, true));