/// Take beat-bar-tick info from the Jack system, and translate it to a new internal frame position and ticksize.
void JackOutput::relocateBBT()
{
Preferences* pPref = Preferences::get_instance();
//wolke if hydrogen is jack time master this is not relevant
if ( m_transport.m_status != TransportInfo::ROLLING
|| pPref->m_bJackMasterMode == Preferences::USE_JACK_TIME_MASTER
|| ! ( m_JackTransportPos.valid & JackPositionBBT )
) {
WARNINGLOG( "Relocate: Call it off" );
return;
}
//WARNINGLOG( "Resyncing!" );
INFOLOG( "..." );
Hydrogen * H = Hydrogen::get_instance();
Song * S = H->getSong();
float hydrogen_TPB = ( float )( S->__resolution / m_JackTransportPos.beat_type * 4 );
long bar_ticks = 0;
//long beat_ticks = 0;
if ( S->get_mode() == Song::SONG_MODE ) {
// (Reasonable?) assumption that one pattern is _always_ 1 bar long!
bar_ticks = H->getTickForPosition( m_JackTransportPos.bar-1 );
// ignore error NOTE This is wrong -- if loop state is off, transport should just stop ??
if ( bar_ticks < 0 ) bar_ticks = 0;
}
float hydrogen_ticks_to_locate = bar_ticks + ( m_JackTransportPos.beat-1 ) * hydrogen_TPB +
m_JackTransportPos.tick * ( hydrogen_TPB / m_JackTransportPos.ticks_per_beat );
// INFOLOG( QString( "Position from Time Master: BBT [%1,%2,%3]" ) . arg( m_JackTransportPos.bar ) . arg( m_JackTransportPos.beat ) . arg( m_JackTransportPos.tick ) );
// WARNINGLOG( QString(bbt) + " -- Tx/Beat = "+to_string(m_JackTransportPos.ticks_per_beat)+", Meter "+to_string(m_JackTransportPos.beats_per_bar)+"/"+to_string(m_JackTransportPos.beat_type)+" =>tick " + to_string( hydrogen_ticks_to_locate ) );
float fNewTickSize = getSampleRate() * 60.0 / m_transport.m_nBPM / S->__resolution;
// not S->m_fBPM !??
if ( fNewTickSize == 0 ) return; // ??!?
// NOTE this _should_ prevent audioEngine_process_checkBPMChanged in Hydrogen.cpp from recalculating things.
m_transport.m_nTickSize = fNewTickSize;
long long nNewFrames = ( long long )( hydrogen_ticks_to_locate * fNewTickSize );
#ifndef JACK_NO_BBT_OFFSET
if ( m_JackTransportPos.valid & JackBBTFrameOffset )
nNewFrames += m_JackTransportPos.bbt_offset;
#endif
m_transport.m_nFrames = nNewFrames;
}
void JackAudioDriver::relocateBBT()
{
Preferences* pPref = Preferences::get_instance();
// If Hydrogen itself is the JACK timebase master, this
// function is not relevant.
if ( m_transport.m_status != TransportInfo::ROLLING
|| pPref->m_bJackMasterMode == Preferences::USE_JACK_TIME_MASTER
|| ! ( m_JackTransportPos.valid & JackPositionBBT )
) {
// WARNINGLOG( "Relocate: Call it off" );
return;
}
// WARNINGLOG( "Relocate..." );
Hydrogen * H = Hydrogen::get_instance();
Song * S = H->getSong();
// m_JackTransportPos.beat_type contains the denominator of
// the time signature and is given in number of ticks per
// quarter. Thus, hydrogen_TPB contains the number of beats
// per denominator of the JACK time signature. (Ticks per bar)
float hydrogen_TPB = ( float )( S->__resolution / m_JackTransportPos.beat_type * 4 );
long bar_ticks = 0;
//long beat_ticks = 0;
if ( S->get_mode() == Song::SONG_MODE ) {
// m_JackTransportPos.bar accesses the current bar at
// the transport position. (Reasonable?) assumption
// that one pattern is _always_ 1 bar long!
bar_ticks = H->getTickForPosition( m_JackTransportPos.bar-1 );
// If a tick corresponding to the position of the
// current bar-1 could not be found, we will use the
// tick at the very beginning of the song instead.
if ( bar_ticks < 0 ) bar_ticks = 0;
}
// m_JackTransportPos.beat refers to the current beat within a
// bar, m_JackTransportPos.tick to the current tick within a
// beat, and m_JackTransportPos.ticks_per_beat to the number
// of ticks per beat.
// Using hydrogen_TPB as conversion factor, the relocation
// position in ticks will be calculated by combining the
// current bar, beat, and tick.
float hydrogen_ticks_to_locate = bar_ticks +
( m_JackTransportPos.beat-1 ) * hydrogen_TPB +
m_JackTransportPos.tick * ( hydrogen_TPB / m_JackTransportPos.ticks_per_beat );
INFOLOG( QString( "Position from Timebase Master: BBT [%1,%2,%3]" ).arg( m_JackTransportPos.bar ).arg( m_JackTransportPos.beat ).arg( m_JackTransportPos.tick ) );
// WARNINGLOG( "Tx/Beat = "+to_string(m_JackTransportPos.ticks_per_beat)+", Meter "+to_string(m_JackTransportPos.beats_per_bar)+"/"+to_string(m_JackTransportPos.beat_type)+" =>tick " + to_string( hydrogen_ticks_to_locate ) );
// Before calling this function in updateTransportInfo() the
// speed obtained by the JACK server query was already written
// to m_transport.m_nBPM. This value can thus be considered
// clean.
float fNewTickSize = getSampleRate() * 60.0 / m_transport.m_nBPM / S->__resolution;
if ( fNewTickSize == 0 ) return;
// Note that this will prevent
// audioEngine_process_checkBPMChanged() in Hydrogen.cpp from
// recalculating things unless m_transport.m_nBpm and S->__bpm
// aren't equal.
m_transport.m_nTickSize = fNewTickSize;
// New transport position in frames
long long nNewFrames = ( long long )( hydrogen_ticks_to_locate * fNewTickSize );
#ifndef JACK_NO_BBT_OFFSET
// m_JackTransportPos.bbt_offset is a frame offset for the BBT
// fields (the given bar, beat, and tick values actually refer
// to a time frame_offset frames before the start of the
// cycle), should be assumed to be 0 if JackBBTFrameOffset is
// not set. If JackBBTFrameOffset is set and this value is
// zero, the BBT time refers to the first frame of this
// cycle. If the value is positive, the BBT time refers to a
// frame that many frames before the start of the cycle.
//
// Due to the if clause in the beginning of the function, the
// following if clause is true at all times.
if ( m_JackTransportPos.valid & JackBBTFrameOffset )
nNewFrames += m_JackTransportPos.bbt_offset;
#endif
m_transport.m_nFrames = nNewFrames;
}
