MainWorkflow.cpp 11.9 KB
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/*****************************************************************************
 * MainWorkflow.cpp : Will query all of the track workflows to render the final
 *                    image
 *****************************************************************************
 * Copyright (C) 2008-2009 the VLMC team
 *
 * Authors: Hugo Beauzee-Luyssen <hugo@vlmc.org>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#include <QtDebug>

#include "MainWorkflow.h"

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//JUST FOR THE DEFINES !
//TODO:
//FIXME: remove this !
#include "ClipWorkflow.h"

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unsigned char*  MainWorkflow::blackOutput = NULL;

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MainWorkflow::MainWorkflow( int trackCount ) :
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        m_currentFrame( 0 ),
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        m_length( 0 ),
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        m_renderStarted( false )
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{
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    MainWorkflow::blackOutput = new unsigned char[VIDEOHEIGHT * VIDEOWIDTH * 3];
    memset( MainWorkflow::blackOutput, 0, VIDEOHEIGHT * VIDEOWIDTH * 3 );
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    m_renderStartedLock = new QReadWriteLock;
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    m_renderMutex = new QMutex;
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    m_synchroneRenderWaitCondition = new QWaitCondition;
    m_synchroneRenderWaitConditionMutex = new QMutex;
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    m_tracks = new TrackHandler*[2];
    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
    {
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        TrackWorkflow::TrackType trackType = (i == 0 ? TrackWorkflow::Video : TrackWorkflow::Audio );
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        m_tracks[i] = new TrackHandler( trackCount, trackType );
        connect( m_tracks[i], SIGNAL( tracksPaused() ), this, SLOT( tracksPaused() ) );
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        connect( m_tracks[i], SIGNAL( allTracksRenderCompleted() ), this, SLOT( tracksRenderCompleted() ) );
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    }
    m_outputBuffers = new OutputBuffers;
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}

MainWorkflow::~MainWorkflow()
{
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    //FIXME: this is probably useless, since already done by the renderer
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    stop();

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    delete m_synchroneRenderWaitConditionMutex;
    delete m_synchroneRenderWaitCondition;
    delete m_renderMutex;
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    delete m_renderStartedLock;
    delete[] blackOutput;
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    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
        delete m_tracks[i];
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    delete[] m_tracks;
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}

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void            MainWorkflow::addClip( Clip* clip, unsigned int trackId,
                                        qint64 start, TrackWorkflow::TrackType trackType )
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{
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    m_tracks[trackType]->addClip( clip, trackId, start );
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    //Inform the GUI
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    emit clipAdded( clip, trackId, start, trackType );
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}
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void            MainWorkflow::computeLength()
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{
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    qint64      maxLength = 0;

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    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
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    {
        if ( m_tracks[i]->getLength() > maxLength )
            maxLength = m_tracks[i]->getLength();
    }
    m_length = maxLength;
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}

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void    MainWorkflow::startRender()
{
    m_renderStarted = true;
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    m_paused = false;
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    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
        m_tracks[i]->startRender();
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    computeLength();
}

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void                MainWorkflow::getOutput()
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{
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    QReadLocker     lock( m_renderStartedLock );
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    QMutexLocker    lock2( m_renderMutex );
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    if ( m_renderStarted == true )
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    {
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        for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
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            m_tracks[i]->getOutput( m_currentFrame );
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        if ( m_paused == false )
            nextFrame();
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    }
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}
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void        MainWorkflow::pause()
{
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    QMutexLocker    lock( m_renderMutex );

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    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
        m_tracks[i]->pause();
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}

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void        MainWorkflow::unpause()
{
    QMutexLocker    lock( m_renderMutex );

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    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
        m_tracks[i]->unpause();
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}

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void        MainWorkflow::nextFrame()
{
    ++m_currentFrame;
    emit frameChanged( m_currentFrame );
    emit positionChanged( (float)m_currentFrame / (float)m_length );
}

void        MainWorkflow::previousFrame()
{
    --m_currentFrame;
    emit frameChanged( m_currentFrame );
    emit positionChanged( (float)m_currentFrame / (float)m_length );
}

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void        MainWorkflow::setPosition( float pos )
{
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    if ( m_renderStarted == true )
    {
        //Since any track can be reactivated, we reactivate all of them, and let them
        //unable themself if required.
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        for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i)
            m_tracks[i]->activateAll();
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    }
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    qint64  frame = static_cast<qint64>( (float)m_length * pos );
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    m_currentFrame = frame;
    emit frameChanged( frame );
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    //Do not emit a signal for the RenderWidget, since it's the one that triggered that call...
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}

qint64      MainWorkflow::getLength() const
{
    return m_length;
}
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qint64      MainWorkflow::getClipPosition( const QUuid& uuid, unsigned int trackId, TrackWorkflow::TrackType trackType ) const
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{
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    return m_tracks[trackType]->getClipPosition( uuid, trackId );
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}
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void            MainWorkflow::stop()
{
    QWriteLocker    lock( m_renderStartedLock );

    m_renderStarted = false;
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    for (unsigned int i = 0; i < TrackWorkflow::NbType; ++i)
        m_tracks[i]->stop();
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    m_currentFrame = 0;
    emit frameChanged( 0 );
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    emit positionChanged( 0 );
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}
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void           MainWorkflow::moveClip( const QUuid& clipUuid, unsigned int oldTrack,
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                                       unsigned int newTrack, qint64 startingFrame,
                                       TrackWorkflow::TrackType trackType, bool undoRedoCommand /*= false*/ )
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{
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    m_tracks[trackType]->moveClip( clipUuid, oldTrack, newTrack, startingFrame );
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    computeLength();
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    if ( undoRedoCommand == true )
    {
        emit clipMoved( clipUuid, newTrack, startingFrame, trackType );
    }
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}
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Clip*       MainWorkflow::removeClip( const QUuid& uuid, unsigned int trackId, TrackWorkflow::TrackType trackType )
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{
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    emit clipRemoved( uuid, trackId, trackType );
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    return m_tracks[trackType]->removeClip( uuid, trackId );
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}

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MainWorkflow::OutputBuffers*  MainWorkflow::getSynchroneOutput()
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{
    m_synchroneRenderWaitConditionMutex->lock();
    getOutput();
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//    qDebug() << "Waiting for sync output";
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    m_synchroneRenderWaitCondition->wait( m_synchroneRenderWaitConditionMutex );
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//    qDebug() << "Got it";
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    m_synchroneRenderWaitConditionMutex->unlock();
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    m_outputBuffers->video = m_tracks[TrackWorkflow::Video]->getSynchroneOutput();
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    return m_outputBuffers;
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}
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void        MainWorkflow::cancelSynchronisation()
{
    {
        QMutexLocker    lock( m_synchroneRenderWaitConditionMutex );
    }
    m_synchroneRenderWaitCondition->wakeAll();
}
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void        MainWorkflow::muteTrack( unsigned int trackId, TrackWorkflow::TrackType trackType )
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{
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    m_tracks[trackType]->muteTrack( trackId );
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}

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void        MainWorkflow::unmuteTrack( unsigned int trackId, TrackWorkflow::TrackType trackType )
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{
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    m_tracks[trackType]->unmuteTrack( trackId );
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}
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void        MainWorkflow::setCurrentFrame( qint64 currentFrame )
{
    m_currentFrame = currentFrame;
    emit positionChanged( (float)m_currentFrame / (float)m_length );
}
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Clip*       MainWorkflow::getClip( const QUuid& uuid, unsigned int trackId, TrackWorkflow::TrackType trackType )
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{
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    return m_tracks[trackType]->getClip( uuid, trackId );
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}
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void        MainWorkflow::loadProject( const QDomElement& project )
{
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//    if ( project.isNull() == true || project.tagName() != "timeline" )
//    {
//        qWarning() << "Invalid timeline node (" << project.tagName() << ')';
//        return ;
//    }
//
//    clear();
//
//    QDomElement elem = project.firstChild().toElement();
//
//    while ( elem.isNull() == false )
//    {
//        bool    ok;
//
//        Q_ASSERT( elem.tagName() == "track" );
//        unsigned int trackId = elem.attribute( "id" ).toUInt( &ok );
//        if ( ok == false )
//        {
//            qWarning() << "Invalid track number in project file";
//            return ;
//        }
//        QDomElement clip = elem.firstChild().toElement();
//        while ( clip.isNull() == false )
//        {
//            //Iterate over clip fields:
//            QDomElement clipProperty = clip.firstChild().toElement();
//            QUuid       parent;
//            qint64      begin;
//            qint64      end;
//            qint64      startPos;
//
//            while ( clipProperty.isNull() == false )
//            {
//                QString tagName = clipProperty.tagName();
//                bool    ok;
//
//                if ( tagName == "parent" )
//                    parent = QUuid( clipProperty.text() );
//                else if ( tagName == "begin" )
//                {
//                    begin = clipProperty.text().toLongLong( &ok );
//                    if ( ok == false )
//                    {
//                        qWarning() << "Invalid clip begin";
//                        return ;
//                    }
//                }
//                else if ( tagName == "end" )
//                {
//                    end = clipProperty.text().toLongLong( &ok );
//                    if ( ok == false )
//                    {
//                        qWarning() << "Invalid clip end";
//                        return ;
//                    }
//                }
//                else if ( tagName == "startFrame" )
//                {
//                    startPos = clipProperty.text().toLongLong( &ok );
//                    if ( ok == false )
//                    {
//                        qWarning() << "Invalid clip starting frame";
//                        return ;
//                    }
//                }
//                else
//                    qDebug() << "Unknown field" << clipProperty.tagName();
//
//                clipProperty = clipProperty.nextSibling().toElement();
//            }
//
//            Clip*       c = new Clip( parent, begin, end );
//            addClip( c, trackId, startPos, TrackWorkflow::Video );
//
//            clip = clip.nextSibling().toElement();
//        }
//        elem = elem.nextSibling().toElement();
//    }
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}

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void        MainWorkflow::saveProject( QDomDocument& doc, QDomElement& rootNode )
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{
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//    QDomElement project = doc.createElement( "timeline" );
//    for ( unsigned int i = 0; i < m_trackCount; ++i )
//    {
//        if ( m_tracks[i]->getLength() > 0 )
//        {
//            QDomElement     trackNode = doc.createElement( "track" );
//
//            trackNode.setAttribute( "id", i );
//
//            m_tracks[i]->save( doc, trackNode );
//            project.appendChild( trackNode );
//        }
//    }
//    rootNode.appendChild( project );
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}
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void        MainWorkflow::clear()
{
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    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
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        m_tracks[i]->clear();
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    emit cleared();
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}
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void        MainWorkflow::setFullSpeedRender( bool value )
{
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    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
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        m_tracks[i]->setFullSpeedRender( value );
}
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void        MainWorkflow::tracksPaused()
{
    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
        if ( m_tracks[i]->isPaused() == false )
            return ;
    emit mainWorkflowPaused();
}

void        MainWorkflow::tracksRenderCompleted()
{
    for ( unsigned int i = 0; i < TrackWorkflow::NbType; ++i )
        if ( m_tracks[i]->allTracksRendered() == false )
            return ;
    {
        QMutexLocker    lock( m_synchroneRenderWaitConditionMutex );
    }
    m_synchroneRenderWaitCondition->wakeAll();
}
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int         MainWorkflow::getTrackCount( TrackWorkflow::TrackType trackType ) const
{
    return m_tracks[trackType]->getTrackCount();
}