C++ Hydrogen::setTimelineBpm方法代码示例

void JackOutput::updateTransportInfo()
{
		if ( locate_countdown == 1 )
				locate( locate_frame );
		if ( locate_countdown > 0 )
				locate_countdown--;

		if ( Preferences::get_instance()->m_bJackTransportMode !=  Preferences::USE_JACK_TRANSPORT   ) return;

				m_JackTransportState = jack_transport_query( client, &m_JackTransportPos );


				// update m_transport with jack-transport data
				switch ( m_JackTransportState ) {
				case JackTransportStopped:
						m_transport.m_status = TransportInfo::STOPPED;
						//infoLog( "[updateTransportInfo] STOPPED - frames: " + to_string(m_transportPos.frame) );
						break;

				case JackTransportRolling:
						if ( m_transport.m_status != TransportInfo::ROLLING && ( m_JackTransportPos.valid & JackPositionBBT ) ) {
								must_relocate = 2;
								//WARNINGLOG( "Jack transport starting: Resyncing in 2 x Buffersize!!" );
						}
						m_transport.m_status = TransportInfo::ROLLING;
						//infoLog( "[updateTransportInfo] ROLLING - frames: " + to_string(m_transportPos.frame) );
						break;

				case JackTransportStarting:
						m_transport.m_status = TransportInfo::STOPPED;
						//infoLog( "[updateTransportInfo] STARTING (stopped) - frames: " + to_string(m_transportPos.frame) );
						break;

				default:
						ERRORLOG( "Unknown jack transport state" );
		}


		// FIXME
		// TickSize and BPM
		Hydrogen * H = Hydrogen::get_instance();
		H->setTimelineBpm(); // dlr: fix #168, jack may have re-located us anywhere, check for bpm change every cycle

		if ( m_JackTransportPos.valid & JackPositionBBT ) {
			float bpm = ( float )m_JackTransportPos.beats_per_minute;
			if ( m_transport.m_nBPM != bpm ) {


				if ( Preferences::get_instance()->m_bJackMasterMode == Preferences::NO_JACK_TIME_MASTER ){
					// 					WARNINGLOG( QString( "Tempo change from jack-transport: %1" ).arg( bpm ) );
					m_transport.m_nBPM = bpm;
					must_relocate = 1; // The tempo change has happened somewhere during the previous cycle; relocate right away.

					// This commenting out is rude perhaps, but I cant't figure out what this bit is doing.
					// In any case, setting must_relocate = 1 here causes too many relocates. Jakob Lund
					/*				} else {
	 if ( m_transport.m_status == TransportInfo::STOPPED ) {
	  oldpo = H->getPatternPos();
	  must_relocate = 1;
	  //changer =1;
	 }*/

				}

				// Hydrogen::get_instance()->setBPM( m_JackTransportPos.beats_per_minute ); // unnecessary, as Song->m_BPM gets updated in audioEngine_process_transport (after calling this function)
			}
		}

		if ( m_transport.m_nFrames + bbt_frame_offset != m_JackTransportPos.frame ) {
			if ( ( m_JackTransportPos.valid & JackPositionBBT ) && must_relocate == 0 ) {
				WARNINGLOG( "Frame offset mismatch; triggering resync in 2 cycles" );
				must_relocate = 2;
			} else {
				if ( Preferences::get_instance()->m_bJackMasterMode == Preferences::NO_JACK_TIME_MASTER ) {
					// If There's no timebase_master, and audioEngine_process_checkBPMChanged handled a tempo change during last cycle, the offset doesn't match, but hopefully it was calculated correctly:

					//this perform Jakobs mod in pattern mode, but both m_transport.m_nFrames works with the same result in pattern Mode
					// in songmode the first case dont work.
					//so we can remove this "if query" and only use this old mod: m_transport.m_nFrames = H->getHumantimeFrames();
					//because to get the songmode we have to add this "H2Core::Hydrogen *m_pEngine" to the header file
					//if we remove this we also can remove *m_pEngine from header
#if 0 // dlr: fix #169, why do we have a different behaviour for SONG_MODE?
					if ( m_pEngine->getSong()->get_mode() == Song::PATTERN_MODE  ){
						m_transport.m_nFrames = m_JackTransportPos.frame/* - bbt_frame_offset*/; ///see comment in svn changeset 753
					}
					else
					{
						m_transport.m_nFrames = H->getHumantimeFrames();
					}
#else
					m_transport.m_nFrames = m_JackTransportPos.frame;
					bbt_frame_offset = 0; // dlr: stop re-syncing in every cycle when STOPPED
#endif
					// In jack 'slave' mode, if there's no master, the following line is needed to be able to relocate by clicking the song ruler (wierd corner case, but still...)
					if ( m_transport.m_status == TransportInfo::ROLLING )
						H->triggerRelocateDuringPlay();
				} else {
					///this is experimantal... but it works for the moment... fix me fix :-) wolke
					// ... will this actually happen? keeping it for now ( jakob lund )
					m_transport.m_nFrames = H->getHumantimeFrames();
//.........这里部分代码省略.........

/**
 * The handleAction method is the heard of the MidiActionManager class.
 * It executes the operations that are needed to carry the desired action.
 */
bool MidiActionManager::handleAction( MidiAction * pAction ){

	Hydrogen *pEngine = Hydrogen::get_instance();

	/*
		return false if action is null
		(for example if no Action exists for an event)
	*/
	if( pAction == NULL )	return false;

	QString sActionString = pAction->getType();


	if( sActionString == "PLAY" )
	{
		int nState = pEngine->getState();
		if ( nState == STATE_READY ){
			pEngine->sequencer_play();
		}
		return true;
	}

	if( sActionString == "PLAY/STOP_TOGGLE" || sActionString == "PLAY/PAUSE_TOGGLE" )
	{
		int nState = pEngine->getState();
		switch ( nState )
		{
		case STATE_READY:
			pEngine->sequencer_play();
			break;

		case STATE_PLAYING:
			if( sActionString == "PLAY/STOP_TOGGLE" ) pEngine->setPatternPos( 0 );
			pEngine->sequencer_stop();
			pEngine->setTimelineBpm();
			break;

		default:
			ERRORLOG( "[Hydrogen::ActionManager(PLAY): Unhandled case" );
		}

		return true;
	}

	if( sActionString == "PAUSE" )
	{
		pEngine->sequencer_stop();
		return true;
	}

	if( sActionString == "STOP" )
	{
		pEngine->sequencer_stop();
		pEngine->setPatternPos( 0 );
		pEngine->setTimelineBpm();
		return true;
	}

	if( sActionString == "MUTE" ){
		//mutes the master, not a single strip
		pEngine->getSong()->__is_muted = true;
		return true;
	}

	if( sActionString == "UNMUTE" ){
		pEngine->getSong()->__is_muted = false;
		return true;
	}

	if( sActionString == "MUTE_TOGGLE" ){
		pEngine->getSong()->__is_muted = !Hydrogen::get_instance()->getSong()->__is_muted;
		return true;
	}

	if( sActionString == "BEATCOUNTER" ){
		pEngine->handleBeatCounter();
		return true;
	}

	if( sActionString == "TAP_TEMPO" ){
		pEngine->onTapTempoAccelEvent();
		return true;
	}

	if( sActionString == "SELECT_NEXT_PATTERN" ){
		bool ok;
		int row = pAction->getParameter1().toInt(&ok,10);
		if( row> pEngine->getSong()->get_pattern_list()->size() -1 )
			return false;
		if(Preferences::get_instance()->patternModePlaysSelected())
			pEngine->setSelectedPatternNumber( row );
		else
			pEngine->sequencer_setNextPattern( row, false, true );
		return true;
	}

//.........这里部分代码省略.........

void JackAudioDriver::updateTransportInfo()
{
	// The following four lines do only cover the special case of
	// audioEngine_updateNoteQueue() returning -1 in
	// audioEngine_process() and triggering an addition relocation
	// of the transport position to the beginning of the song
	// using locateInNCycles() to possibly keep synchronization
	// with Ardour.
	if ( locate_countdown == 1 )
		locate( locate_frame );
	if ( locate_countdown > 0 )
		locate_countdown--;
	
	if ( Preferences::get_instance()->m_bJackTransportMode !=
	     Preferences::USE_JACK_TRANSPORT ){
		return;
	}
	// jack_transport_query() (jack/transport.h) queries the
	// current transport state and position. If called from the
	// process thread, the second argument, which is a pointer to
	// a structure for returning current transport, corresponds to
	// the first frame of the current cycle and the state returned
	// is valid for the entire cycle. #m_JackTransportPos->valid
	// will show which fields contain valid data. If
	// #m_JackTransportPos is NULL, do not return position
	// information.
	m_JackTransportState = jack_transport_query( m_pClient, &m_JackTransportPos );

	// WARNINGLOG( QString( "[Jack-Query] state: %1, frame: %2, position bit: %3, bpm: %4" )
	// 	 .arg( m_JackTransportState )
	// 	 .arg( m_JackTransportPos.frame )
	// 	 .arg( m_JackTransportPos.valid )
	// 	 .arg( m_JackTransportPos.beats_per_minute ) );
	// Update the TransportInfo in m_transport based on the state
	// returned by jack_transport_query.
	switch ( m_JackTransportState ) {
	case JackTransportStopped: // Transport is halted
		m_transport.m_status = TransportInfo::STOPPED;
		//INFOLOG( "[updateTransportInfo] STOPPED - frames: " + to_string(m_transportPos.frame) );
		break;
		
	case JackTransportRolling: // Transport is playing
		// If the valid member matches the JackPositionBBT
		// bits, there is a JACK timebase master present
		// supplying bar, beat, and tick information along
		// with the plain transport position in frames. We
		// will use it for re-positioning. But only at the end
		// of the next cycle, because this timebase master has
		// to properly initialize its state during this cycle
		// too.
		if ( m_transport.m_status != TransportInfo::ROLLING &&
		     ( m_JackTransportPos.valid & JackPositionBBT ) ) {
			must_relocate = 2;
			//WARNINGLOG( "Jack transport starting: Resyncing in 2 x Buffersize!!" );
		}
		m_transport.m_status = TransportInfo::ROLLING;
		//INFOLOG( "[updateTransportInfo] ROLLING - frames: " + to_string(m_transportPos.frame) );
		break;

	case JackTransportStarting: // Waiting for sync ready. If
				    // there are slow-sync clients,
				    // this can take more than one
				    // cycle.
		m_transport.m_status = TransportInfo::STOPPED;
		//INFOLOG( "[updateTransportInfo] STARTING (stopped) - frames: " + to_string(m_transportPos.frame) );
		break;
		
	default:
		ERRORLOG( "Unknown jack transport state" );
	}

	// Updating TickSize and BPM
	Hydrogen * H = Hydrogen::get_instance();
	// JACK may have re-located us anywhere. Therefore, we have to
	// check for a bpm change every cycle. We will do so by
	// updating both the global speed of the song, as well as the
	// fallback speed (H->getNewBpmJTM) with the local tempo at
	// the current position on the timeline.
	H->setTimelineBpm(); 

	// Check whether another JACK master is present (the second if
	// clause won't evaluate to true if Hydrogen itself is the
	// timebase master) and whether it changed the transport
	// state. Note that only the JACK timebase master and not
	// arbitrary clients can do this. If so, the speed is updated
	// an a relocation according to the bar, beat, and tick
	// information will be triggered right away.
	if ( m_JackTransportPos.valid & JackPositionBBT ) {
		float bpm = ( float )m_JackTransportPos.beats_per_minute;
		if ( m_transport.m_nBPM != bpm ) {
			if ( Preferences::get_instance()->m_bJackMasterMode ==
			     Preferences::NO_JACK_TIME_MASTER ){
				// WARNINGLOG( QString( "Tempo change from jack-transport: %1" ).arg( bpm ) );
				m_transport.m_nBPM = bpm;
				must_relocate = 1; 
			}
		}
	}

        // This clause detects a re-location, which was either
//.........这里部分代码省略.........