midimixerwindow.cpp

LINUX下的混音软件

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */

/*
    Rosegarden
    A MIDI and audio sequencer and musical notation editor.
 
    This program is Copyright 2000-2007
        Guillaume Laurent   <[e-mail]>,
        Chris Cannam        <[e-mail]>,
        Richard Bown        <[e-mail]>
 
    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
    Bown to claim authorship of this work have been asserted.
 
    Other copyrights also apply to some parts of this work.  Please
    see the AUTHORS file and individual file headers for details.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/


#include "MidiMixerWindow.h"
#include <qlayout.h>

#include "sound/Midi.h"
#include <klocale.h>
#include "misc/Debug.h"
#include "misc/Strings.h"
#include "base/Colour.h"
#include "base/Device.h"
#include "base/Instrument.h"
#include "base/MidiDevice.h"
#include "base/MidiProgram.h"
#include "base/Studio.h"
#include "document/RosegardenGUIDoc.h"
#include "gui/editors/notation/NotePixmapFactory.h"
#include "gui/seqmanager/SequencerMapper.h"
#include "gui/widgets/Fader.h"
#include "gui/widgets/Rotary.h"
#include "gui/widgets/VUMeter.h"
#include "MidiMixerVUMeter.h"
#include "MixerWindow.h"
#include "sound/MappedEvent.h"
#include "StudioControl.h"
#include <kaction.h>
#include <kmainwindow.h>
#include <kstdaction.h>
#include <qaccel.h>
#include <qcolor.h>
#include <qframe.h>
#include <qiconset.h>
#include <qlabel.h>
#include <qobject.h>
#include <qstring.h>
#include <qtabwidget.h>
#include <qwidget.h>


namespace Rosegarden
{

MidiMixerWindow::MidiMixerWindow(QWidget *parent,
                                 RosegardenGUIDoc *document):
        MixerWindow(parent, document),
        m_tabFrame(0)
{
    // Initial setup
    //
    setupTabs();

    KStdAction::close(this,
                      SLOT(slotClose()),
                      actionCollection());

    QIconSet icon = QIconSet(NotePixmapFactory::toQPixmap(NotePixmapFactory::makeToolbarPixmap
                             ("transport-play")));
    new KAction(i18n("&Play"), icon, Key_Enter, this,
                SIGNAL(play()), actionCollection(), "play");

    icon = QIconSet(NotePixmapFactory::toQPixmap(NotePixmapFactory::makeToolbarPixmap
                    ("transport-stop")));
    new KAction(i18n("&Stop"), icon, Key_Insert, this,
                SIGNAL(stop()), actionCollection(), "stop");

    icon = QIconSet(NotePixmapFactory::toQPixmap(NotePixmapFactory::makeToolbarPixmap
                    ("transport-rewind")));
    new KAction(i18n("Re&wind"), icon, Key_End, this,
                SIGNAL(rewindPlayback()), actionCollection(),
                "playback_pointer_back_bar");

    icon = QIconSet(NotePixmapFactory::toQPixmap(NotePixmapFactory::makeToolbarPixmap
                    ("transport-ffwd")));
    new KAction(i18n("&Fast Forward"), icon, Key_PageDown, this,
                SIGNAL(fastForwardPlayback()), actionCollection(),
                "playback_pointer_forward_bar");

    icon = QIconSet(NotePixmapFactory::toQPixmap(NotePixmapFactory::makeToolbarPixmap
                    ("transport-rewind-end")));
    new KAction(i18n("Rewind to &Beginning"), icon, 0, this,
                SIGNAL(rewindPlaybackToBeginning()), actionCollection(),
                "playback_pointer_start");

    icon = QIconSet(NotePixmapFactory::toQPixmap(NotePixmapFactory::makeToolbarPixmap
                    ("transport-ffwd-end")));
    new KAction(i18n("Fast Forward to &End"), icon, 0, this,
                SIGNAL(fastForwardPlaybackToEnd()), actionCollection(),
                "playback_pointer_end");

    icon = QIconSet(NotePixmapFactory::toQPixmap(NotePixmapFactory::makeToolbarPixmap
                    ("transport-record")));
    new KAction(i18n("&Record"), icon, 0, this,
                SIGNAL(record()), actionCollection(),
                "record");

    icon = QIconSet(NotePixmapFactory::toQPixmap(NotePixmapFactory::makeToolbarPixmap
                    ("transport-panic")));
    new KAction(i18n("Panic"), icon, Key_P + CTRL + ALT, this,
                SIGNAL(panic()), actionCollection(),
                "panic");

    createGUI("midimixer.rc");

}

void
MidiMixerWindow::setupTabs()
{
    DeviceListConstIterator it;
    MidiDevice *dev = 0;
    InstrumentList instruments;
    InstrumentList::const_iterator iIt;
    int faderCount = 0, deviceCount = 1;

    if (m_tabFrame)
        delete m_tabFrame;

    // Setup m_tabFrame
    //
    m_tabWidget = new QTabWidget(this);
    setCentralWidget(m_tabWidget);
    connect(m_tabWidget, SIGNAL(currentChanged(QWidget *)),
            this, SLOT(slotCurrentTabChanged(QWidget *)));
    m_tabWidget->setTabPosition(QTabWidget::Bottom);
    setCaption(i18n("MIDI Mixer"));

    for (it = m_studio->begin(); it != m_studio->end(); ++it) {
        dev = dynamic_cast<MidiDevice*>(*it);

        if (dev) {
            // Get the control parameters that are on the IPB (and hence can
            // be shown here too).
            //
            ControlList controls = dev->getIPBControlParameters();

            instruments = dev->getPresentationInstruments();

            // Don't add a frame for empty devices
            //
            if (!instruments.size())
                continue;

            m_tabFrame = new QFrame(m_tabWidget);
            m_tabFrame->setFrameStyle(QFrame::TabWidgetPanel);
            m_tabFrame->setMargin(10);

            QGridLayout *mainLayout = new QGridLayout
                                      (m_tabFrame, instruments.size() + 4, controls.size() + 4, 5);

            // MIDI Mixer label
            //
            //QLabel *label = new QLabel(QString("%1 %2").
            //arg(strtoqstr(dev->getName()))
            //.arg(i18n("MIDI Mixer")), m_tabFrame);

            QLabel *label = new QLabel("", m_tabFrame);
            mainLayout->addMultiCellWidget(label, 0, 0, 0, 16, Qt::AlignCenter);

            // control labels
            for (unsigned int i = 0; i < controls.size(); ++i) {
                label = new QLabel(strtoqstr(controls[i].getName()), m_tabFrame);
                mainLayout->addWidget(label, i + 1, 0, Qt::AlignCenter);
            }

            // meter label
            //
            //label = new QLabel(i18n("Meter"), m_tabFrame);
            //mainLayout->addWidget(label,
            //controls.size() + 1, 0, Qt::AlignCenter);

            // volume label
            label = new QLabel(i18n("Volume"), m_tabFrame);
            mainLayout->addWidget(label, controls.size() + 2, 0,
                                  Qt::AlignCenter);

            // instrument label
            label = new QLabel(i18n("Instrument"), m_tabFrame);
            mainLayout->addWidget(label, controls.size() + 3, 0,
                                  Qt::AlignCenter);

            int posCount = 1;
            int firstInstrument = -1;

            for (iIt = instruments.begin(); iIt != instruments.end(); ++iIt) {

                // Add new fader struct
                //
                m_faders.push_back(new FaderStruct());

                // Store the first ID
                //
                if (firstInstrument == -1)
                    firstInstrument = (*iIt)->getId();


                // Add the controls
                //
                for (unsigned int i = 0; i < controls.size(); ++i) {
                    QColor knobColour = Qt::white;

                    if (controls[i].getColourIndex() > 0) {
                        Colour c =
                            m_document->getComposition().getGeneralColourMap().
                            getColourByIndex(controls[i].getColourIndex());

                        knobColour = QColor(c.getRed(),
                                            c.getGreen(), c.getBlue());
                    }

                    Rotary *controller =
                        new Rotary(m_tabFrame,
                                   controls[i].getMin(),
                                   controls[i].getMax(),
                                   1.0,
                                   5.0,
                                   controls[i].getDefault(),
                                   20,
                                   Rotary::NoTicks,
                                   false,
                                   controls[i].getDefault() == 64); //!!! hacky

                    controller->setKnobColour(knobColour);

                    connect(controller, SIGNAL(valueChanged(float)),
                            this, SLOT(slotControllerChanged(float)));

                    mainLayout->addWidget(controller, i + 1, posCount,
                                          Qt::AlignCenter);

                    // Store the rotary
                    //
                    m_faders[faderCount]->m_controllerRotaries.push_back(
                        std::pair<MidiByte, Rotary*>
                        (controls[i].getControllerValue(), controller));
                }

                // Pan rotary
                //
                MidiMixerVUMeter *meter =
                    new MidiMixerVUMeter(m_tabFrame,
                                         VUMeter::FixedHeightVisiblePeakHold, 6, 30);
                mainLayout->addWidget(meter, controls.size() + 1,
                                      posCount, Qt::AlignCenter);
                m_faders[faderCount]->m_vuMeter = meter;

                // Volume fader
                //
                Fader *fader =
                    new Fader(0, 127, 100, 20, 80, m_tabFrame);
                mainLayout->addWidget(fader, controls.size() + 2,
                                      posCount, Qt::AlignCenter);
                m_faders[faderCount]->m_volumeFader = fader;
                //fader->setFader(float((*iIt)->getVolume()));

                // Label
                //
                QLabel *idLabel = new QLabel(QString("%1").
                                             arg((*iIt)->getId() - firstInstrument + 1),
                                             m_tabFrame, "idLabel");

                mainLayout->addWidget(idLabel, controls.size() + 3,
                                      posCount, Qt::AlignCenter);

                // store id in struct
                m_faders[faderCount]->m_id = (*iIt)->getId();

                // Connect them up
                //
                connect(fader, SIGNAL(faderChanged(float)),
                        this, SLOT(slotFaderLevelChanged(float)));

                // Update all the faders and controllers
                //
                slotUpdateInstrument((*iIt)->getId());

                // Increment counters
                //
                posCount++;
                faderCount++;
            }

            QString name = QString("%1 (%2)").arg(strtoqstr(dev->getName()))
                           .arg(deviceCount++);

            addTab(m_tabFrame, name);
        }
    }
}

void
MidiMixerWindow::addTab(QWidget *tab, const QString &title)
{
    m_tabWidget->addTab(tab, title);
}

void
MidiMixerWindow::slotFaderLevelChanged(float value)
{
    const QObject *s = sender();

    for (FaderVector::const_iterator it = m_faders.begin();
            it != m_faders.end(); ++it) {
        if ((*it)->m_volumeFader == s) {
            Instrument *instr = m_studio->
                                getInstrumentById((*it)->m_id);

            if (instr) {

                instr->setVolume(MidiByte(value));

                MappedEvent mE((*it)->m_id,
                               MappedEvent::MidiController,
                               MIDI_CONTROLLER_VOLUME,
                               MidiByte(value));
                StudioControl::sendMappedEvent(mE);

                // send out to external controllers as well.
                //!!! really want some notification of whether we have any!
                int tabIndex = m_tabWidget->currentPageIndex();
                if (tabIndex < 0)
                    tabIndex = 0;
                int i = 0;
                for (DeviceList::const_iterator dit = m_studio->begin();
                        dit != m_studio->end(); ++dit) {
                    RG_DEBUG << "slotFaderLevelChanged: i = " << i << ", tabIndex " << tabIndex << endl;
                    if (!dynamic_cast<MidiDevice*>(*dit))
                        continue;
                    if (i != tabIndex) {
                        ++i;
                        continue;
                    }
                    RG_DEBUG << "slotFaderLevelChanged: device id = " << instr->getDevice()->getId() << ", visible device id " << (*dit)->getId() << endl;
                    if (instr->getDevice()->getId() == (*dit)->getId()) {
                        RG_DEBUG << "slotFaderLevelChanged: sending control device mapped event for channel " << instr->getMidiChannel() << endl;
                        mE.setRecordedChannel(instr->getMidiChannel());
                        mE.setRecordedDevice(Device::CONTROL_DEVICE);
                        StudioControl::sendMappedEvent(mE);
                    }
                    break;
                }
            }

            emit instrumentParametersChanged((*it)->m_id);
            return ;
        }
    }
}