sequencemanager.cpp

LINUX下的混音软件

    if (result) {
        // completed successfully
        m_transportStatus = STARTING_TO_PLAY;
    } else {
        m_transportStatus = STOPPED;
        std::cerr << "ERROR: SequenceManager::play(): Failed to start playback!" << std::endl;
    }

    return false;
}

void
SequenceManager::stopping()
{
    if (m_countdownTimer)
        m_countdownTimer->stop();
    if (m_countdownDialog)
        m_countdownDialog->hide();

    // Do this here rather than in stop() to avoid any potential
    // race condition (we use setPointerPosition() during stop()).
    //
    if (m_transportStatus == STOPPED) {
        /*!!!
                if (m_doc->getComposition().isLooping())
                    m_doc->slotSetPointerPosition(m_doc->getComposition().getLoopStart());
                else
                    m_doc->slotSetPointerPosition(m_doc->getComposition().getStartMarker());
        */
        m_doc->slotSetPointerPosition(m_lastTransportStartPosition);

        return ;
    }

    // Disarm recording and drop back to STOPPED
    //
    if (m_transportStatus == RECORDING_ARMED) {
        m_transportStatus = STOPPED;
        m_transport->RecordButton()->setOn(false);
        m_transport->MetronomeButton()->
        setOn(m_doc->getComposition().usePlayMetronome());
        return ;
    }

    SEQMAN_DEBUG << "SequenceManager::stopping() - preparing to stop\n";

    //    SEQMAN_DEBUG << kdBacktrace() << endl;

    stop();

    m_shownOverrunWarning = false;
}

void
SequenceManager::stop()
{
    // Toggle off the buttons - first record
    //
    if (m_transportStatus == RECORDING) {
        m_transport->RecordButton()->setOn(false);
        m_transport->MetronomeButton()->
        setOn(m_doc->getComposition().usePlayMetronome());

        // Remove the countdown dialog and stop the timer
        //
        m_countdownDialog->hide();
        m_countdownTimer->stop();
    }

    // Now playback
    m_transport->PlayButton()->setOn(false);

    // re-enable the record button if it was previously disabled when
    // going into play mode - DMM
    //    SEQMAN_DEBUG << "SequenceManager::stop() - re-enabling record button\n";
    //    m_transport->RecordButton()->setEnabled(true);


    // "call" the sequencer with a stop so we get a synchronous
    // response - then we can fiddle about with the audio file
    // without worrying about the sequencer causing problems
    // with access to the same audio files.
    //

    // wait cursor
    //
    QApplication::setOverrideCursor(QCursor(Qt::waitCursor));

    QCString replyType;
    QByteArray replyData;

    bool failed = false;
    if (!rgapp->sequencerCall("stop()", replyType, replyData)) {
        failed = true;
    }

    // restore
    QApplication::restoreOverrideCursor();

    TransportStatus status = m_transportStatus;

    // set new transport status first, so that if we're stopping
    // recording we don't risk the record segment being restored by a
    // timer while the document is busy trying to do away with it
    m_transportStatus = STOPPED;

    // if we're recording MIDI or Audio then tidy up the recording Segment
    if (status == RECORDING) {
        m_doc->stopRecordingMidi();
        m_doc->stopRecordingAudio();

        SEQMAN_DEBUG << "SequenceManager::stop() - stopped recording\n";
    }

    // always untoggle the play button at this stage
    //
    m_transport->PlayButton()->setOn(false);
    SEQMAN_DEBUG << "SequenceManager::stop() - stopped playing\n";

    // We don't reset controllers at this point - what happens with static
    // controllers the next time we play otherwise?  [rwb]
    //resetControllers();

    if (failed) {
        throw(Exception("Failed to contact Rosegarden sequencer with stop command.   Please save your composition and restart Rosegarden to continue."));
    }
}

void
SequenceManager::rewind()
{
    Composition &composition = m_doc->getComposition();

    timeT position = composition.getPosition();
    std::pair<timeT, timeT> barRange =
        composition.getBarRangeForTime(position - 1);

    if (m_transportStatus == PLAYING) {

        // if we're playing and we had a rewind request less than 200ms
        // ago and we're some way into the bar but less than half way
        // through it, rewind two barlines instead of one

        clock_t now = clock();
        int elapsed = (now - m_lastRewoundAt) * 1000 / CLOCKS_PER_SEC;

        SEQMAN_DEBUG << "That was " << m_lastRewoundAt << ", this is " << now << ", elapsed is " << elapsed << endl;

        if (elapsed >= 0 && elapsed <= 200) {
            if (position > barRange.first &&
                    position < barRange.second &&
                    position <= (barRange.first + (barRange.second -
                                                   barRange.first) / 2)) {
                barRange = composition.getBarRangeForTime(barRange.first - 1);
            }
        }

        m_lastRewoundAt = now;
    }

    if (barRange.first < composition.getStartMarker()) {
        m_doc->slotSetPointerPosition(composition.getStartMarker());
    } else {
        m_doc->slotSetPointerPosition(barRange.first);
    }
}

void
SequenceManager::fastforward()
{
    Composition &composition = m_doc->getComposition();

    timeT position = composition.getPosition() + 1;
    timeT newPosition = composition.getBarRangeForTime(position).second;

    // Don't skip past end marker
    //
    if (newPosition > composition.getEndMarker())
        newPosition = composition.getEndMarker();

    m_doc->slotSetPointerPosition(newPosition);

}

void
SequenceManager::notifySequencerStatus(TransportStatus status)
{
    // for the moment we don't do anything fancy
    m_transportStatus = status;

}

void
SequenceManager::sendSequencerJump(const RealTime &time)
{
    QByteArray data;
    QDataStream streamOut(data, IO_WriteOnly);
    streamOut << (long)time.sec;
    streamOut << (long)time.nsec;

    rgapp->sequencerSend("jumpTo(long int, long int)", data);
}

void
SequenceManager::record(bool toggled)
{
    mapSequencer();

    SEQMAN_DEBUG << "SequenceManager::record(" << toggled << ")" << endl;

    Composition &comp = m_doc->getComposition();
    Studio &studio = m_doc->getStudio();
    KConfig* config = kapp->config();
    config->setGroup(GeneralOptionsConfigGroup);

    bool punchIn = false; // are we punching in?

    // If we have any audio tracks armed, then we need to check for
    // a valid audio record path and a working audio subsystem before
    // we go any further

    const Composition::recordtrackcontainer &recordTracks =
        comp.getRecordTracks();

    for (Composition::recordtrackcontainer::const_iterator i =
                recordTracks.begin();
            i != recordTracks.end(); ++i) {

        Track *track = comp.getTrackById(*i);
        InstrumentId instrId = track->getInstrument();
        Instrument *instr = studio.getInstrumentById(instrId);

        if (instr && instr->getType() == Instrument::Audio) {
            if (!m_doc || !(m_soundDriverStatus & AUDIO_OK)) {
                m_transport->RecordButton()->setOn(false);
                throw(Exception("Audio subsystem is not available - can't record audio"));
            }
            // throws BadAudioPathException if path is not valid:
            m_doc->getAudioFileManager().testAudioPath();
            break;
        }
    }

    if (toggled) { // preparing record or punch-in record

        if (m_transportStatus == RECORDING_ARMED) {
            SEQMAN_DEBUG << "SequenceManager::record - unarming record\n";
            m_transportStatus = STOPPED;

            // Toggle the buttons
            m_transport->MetronomeButton()->setOn(comp.usePlayMetronome());
            m_transport->RecordButton()->setOn(false);

            return ;
        }

        if (m_transportStatus == STOPPED) {
            SEQMAN_DEBUG << "SequenceManager::record - armed record\n";
            m_transportStatus = RECORDING_ARMED;

            // Toggle the buttons
            m_transport->MetronomeButton()->setOn(comp.useRecordMetronome());
            m_transport->RecordButton()->setOn(true);

            return ;
        }

        if (m_transportStatus == RECORDING) {
            SEQMAN_DEBUG << "SequenceManager::record - stop recording and keep playing\n";

            QByteArray data;
            QCString replyType;
            QByteArray replyData;

            // Send Record to the Sequencer to signal it to drop out of record mode
            if (!rgapp->sequencerCall("punchOut()", replyType, replyData, data)) {
                SEQMAN_DEBUG << "SequenceManager::record - the \"not very plausible\" code executed\n";
                // #1797873 - set new transport status first, so that
                // if we're stopping recording we don't risk the
                // record segment being restored by a timer while the
                // document is busy trying to do away with it
                m_transportStatus = STOPPED;

                m_doc->stopRecordingMidi();
                m_doc->stopRecordingAudio();
                return ;
            }

            // #1797873 - as above
            m_transportStatus = PLAYING;

            m_doc->stopRecordingMidi();
            m_doc->stopRecordingAudio();

            return ;
        }

        if (m_transportStatus == PLAYING) {
            SEQMAN_DEBUG << "SequenceManager::record - punch in recording\n";
            punchIn = true;
            goto punchin;
        }

    } else {

        m_lastTransportStartPosition = comp.getPosition();

punchin:

        // Get the record tracks and check we have a record instrument

        bool haveInstrument = false;
        bool haveAudioInstrument = false;
        bool haveMIDIInstrument = false;
        //TrackId recordMIDITrack = 0;

        for (Composition::recordtrackcontainer::const_iterator i =
                    comp.getRecordTracks().begin();
                i != comp.getRecordTracks().end(); ++i) {

            InstrumentId iid =
                comp.getTrackById(*i)->getInstrument();

            Instrument *inst = studio.getInstrumentById(iid);
            if (inst) {
                haveInstrument = true;
                if (inst->getType() == Instrument::Audio) {
                    haveAudioInstrument = true;
                    break;
                } else { // soft synths count as MIDI for our purposes here
                    haveMIDIInstrument = true;
                    //recordMIDITrack = *i;
                }
            }
        }

        if (!haveInstrument) {
            m_transport->RecordButton()->setDown(false);
            throw(Exception("No Record instrument selected"));
        }

        // may throw an exception
        checkSoundDriverStatus(false);

        // toggle the Metronome button if it's in use
        m_transport->MetronomeButton()->setOn(comp.useRecordMetronome());

        // Update record metronome status
        //
        m_controlBlockMmapper->updateMetronomeData
        (m_metronomeMmapper->getMetronomeInstrument());
        m_controlBlockMmapper->updateMetronomeForRecord();

        // If we are looping then jump to start of loop and start recording,
        // if we're not take off the number of count-in bars and start
        // recording.
        //
        if (comp.isLooping())
            m_doc->slotSetPointerPosition(comp.getLoopStart());
        else {
            if (m_transportStatus != RECORDING_ARMED && punchIn == false) {
                int startBar = comp.getBarNumber(comp.getPosition());
                startBar -= config->readUnsignedNumEntry("countinbars", 0);
                m_doc->slotSetPointerPosition(comp.getBarRange(startBar).first);
            }
        }

        m_doc->setRecordStartTime(m_doc->getComposition().getPosition());

        if (haveAudioInstrument) {
            // Ask the document to update its record latencies so as to
            // do latency compensation when we stop
            m_doc->updateAudioRecordLatency();
        }

        if (haveMIDIInstrument) {
            // Create the record MIDI segment now, so that the
            // composition view has a real segment to display.  It