void JackOutput::jack_timebase_callback(jack_transport_state_t state,
jack_nframes_t nframes,
jack_position_t *pos,
int new_pos,
void *arg)
{
JackOutput *me = static_cast<JackOutput*>(arg);
if (! me) return;
Hydrogen * H = Hydrogen::get_instance();
Song* S = H->getSong();
if ( ! S ) return;
unsigned long PlayTick = ( pos->frame - me->bbt_frame_offset ) / me->m_transport.m_nTickSize;
pos->bar = H->getPosForTick ( PlayTick );
double TPB = H->getTickForHumanPosition( pos->bar );
if ( TPB < 1 ) return;
/* We'll cheat there is ticks_per_beat * 4 in bar
so every Hydrogen tick will be multipled by 4 ticks */
pos->ticks_per_beat = TPB;
pos->valid = JackPositionBBT;
pos->beats_per_bar = TPB / 48;
pos->beat_type = 4.0;
pos->beats_per_minute = H->getTimelineBpm ( pos->bar );
pos->bar++;
// Probably there will never be an offset, cause we are the master ;-)
#ifndef JACK_NO_BBT_OFFSET
pos->valid = static_cast<jack_position_bits_t> ( pos->valid | JackBBTFrameOffset );
pos->bbt_offset = 0;
#endif
if (H->getHumantimeFrames() < 1) {
pos->beat = 1;
pos->tick = 0;
pos->bar_start_tick = 0;
} else {
/* how many ticks elpased from last bar ( where bar == pattern ) */
int32_t TicksFromBar = ( PlayTick % (int32_t) pos->ticks_per_beat ) * 4;
pos->bar_start_tick = PlayTick - TicksFromBar;
pos->beat = TicksFromBar / pos->ticks_per_beat;
pos->beat++;
pos->tick = TicksFromBar % (int32_t) pos->ticks_per_beat;
#if 0
// printf ( "\e[0K\rBar %d, Beat %d, Tick %d, BPB %g, BarStartTick %g",
printf ( "Bar %d, Beat %d, Tick %d, BPB %g, BarStartTick %g\n",
pos->bar, pos->beat,pos->tick, pos->beats_per_bar, pos->bar_start_tick );
#endif
}
}
