//beginn jack time master
void JackOutput::initTimeMaster()
{
if ( ! client ) return;
Preferences* pref = Preferences::get_instance();
if ( pref->m_bJackMasterMode == Preferences::USE_JACK_TIME_MASTER) {
int ret = jack_set_timebase_callback(client, m_bCond, jack_timebase_callback, this);
if (ret != 0) pref->m_bJackMasterMode = Preferences::NO_JACK_TIME_MASTER;
} else {
jack_release_timebase(client);
}
}
void JackAudioDriver::initTimeMaster()
{
if ( ! m_pClient ) return;
Preferences* pref = Preferences::get_instance();
if ( pref->m_bJackMasterMode == Preferences::USE_JACK_TIME_MASTER) {
// Defined in jack/transport.h
// Register as timebase master for the JACK
// subsystem.
//
// The timebase master registers a callback that
// updates extended position information such as
// beats or timecode whenever necessary. Without
// this extended information, there is no need for
// this function.
//
// There is never more than one master at a time.
// When a new client takes over, the former @a
// timebase_callback is no longer called. Taking
// over the timebase may be done conditionally, so
// it fails if there was a master already.
//
// @param client the JACK client structure.
// @param conditional non-zero for a conditional
// request.
// @param timebase_callback is a realtime function
// that returns position information.
// @param arg an argument for the @a timebase_callback
// function.
// @return
// - 0 on success;
// - EBUSY if a conditional request fails because
// there was already a timebase master;
// - other non-zero error code.
int ret = jack_set_timebase_callback(m_pClient, m_nJackConditionalTakeOver,
jack_timebase_callback, this);
if (ret != 0) pref->m_bJackMasterMode = Preferences::NO_JACK_TIME_MASTER;
} else {
// Called by the timebase master to release itself
// from that responsibility (defined in
// jack/transport.h).
jack_release_timebase(m_pClient);
}
}
void JackOutput::com_release()
{
if ( client == NULL) return;
jack_release_timebase(client);
}
void JackAudioDriver::com_release()
{
if ( m_pClient == NULL) return;
jack_release_timebase(m_pClient);
}
static void com_release(char *arg)
{
jack_release_timebase(client);
}