AudioCallbackPlayTarget::AudioCallbackPlayTarget(AudioCallbackPlaySource *source) :
m_source(source),
m_outputGain(1.0)
{
if (m_source) {
connect(m_source, SIGNAL(modelReplaced()),
this, SLOT(sourceModelReplaced()));
}
}
AudioJACKTarget::AudioJACKTarget(AudioCallbackPlaySource *source) :
AudioCallbackPlayTarget(source),
m_client(0),
m_bufferSize(0),
m_sampleRate(0),
m_done(false)
{
JackOptions options = JackNullOption;
#ifdef HAVE_PORTAUDIO_2_0
options = JackNoStartServer;
#endif
#ifdef HAVE_LIBPULSE
options = JackNoStartServer;
#endif
JackStatus status = JackStatus(0);
m_client = jack_client_open(source->getClientName().toLocal8Bit().data(),
options, &status);
if (!m_client) {
std::cerr << "AudioJACKTarget: Failed to connect to JACK server: status code "
<< status << std::endl;
return;
}
m_bufferSize = jack_get_buffer_size(m_client);
m_sampleRate = jack_get_sample_rate(m_client);
jack_set_xrun_callback(m_client, xrunStatic, this);
jack_set_process_callback(m_client, processStatic, this);
if (jack_activate(m_client)) {
std::cerr << "ERROR: AudioJACKTarget: Failed to activate JACK client"
<< std::endl;
}
if (m_source) {
sourceModelReplaced();
}
// Mainstream JACK (though not jackdmp) calls mlockall() to lock
// down all memory for real-time operation. That isn't a terribly
// good idea in an application like this that may have very high
// dynamic memory usage in other threads, as mlockall() applies
// across all threads. We're far better off undoing it here and
// accepting the possible loss of true RT capability.
MUNLOCKALL();
}
