File indexing completed on 2024-05-12 04:51:52

 /*
     SPDX-FileCopyrightText: 2009-2010 Michal Malek <michalm@jabster.pl>
     SPDX-FileCopyrightText: 1998-2008 Sebastian Trueg <trueg@k3b.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "k3bvideodvdrippingpreview.h"
 
 #include "k3bcore.h"
 #include "k3bexternalbinmanager.h"
 #include "k3bdevice.h"
 #include "k3bprocess.h"
 #include <QDebug>
 #include <QDir>
 #include <QTemporaryDir>
 
 
 
 K3b::VideoDVDRippingPreview::VideoDVDRippingPreview( QObject* parent )
     : QObject( parent ),
       m_process( 0 )
 {
 }
 
 
 K3b::VideoDVDRippingPreview::~VideoDVDRippingPreview()
 {
     cancel();
     if (m_process) {
         m_process->deleteLater();
         m_process = Q_NULLPTR;
     }
 }
 
 
 void K3b::VideoDVDRippingPreview::generatePreview( const K3b::VideoDVD::VideoDVD& dvd, int title, int chapter )
 {
     // cleanup first
     cancel();
     if (m_process) {
         m_process->deleteLater();
         m_process = 0;
     }
     m_tempDir.reset();
     m_canceled = false;
 
     const K3b::ExternalBin* bin = k3bcore->externalBinManager()->binObject("transcode");
     if( !bin ) {
         emit previewDone( false );
         return;
     }
 
     // auto-select a chapter
     // choose the center chapter, but not the first or last if possible
     if( chapter == 0 )
         chapter = qMin( qMax( dvd[title-1].numChapters()/2, 2U ), qMax( dvd[title-1].numChapters() - 1, 1U ) );
 
     // select a frame number
     unsigned int frame = 30;
     if( dvd[title-1][chapter-1].playbackTime().totalFrames() < frame )
         frame = dvd[title-1][chapter-1].playbackTime().totalFrames() / 2;
 
     m_dvd = dvd;
     m_title = title;
     m_chapter = chapter;
 
     m_tempDir.reset( new QTemporaryDir );
 
     m_process = new Process();
     *m_process << bin->path();
     if ( bin->version() >= Version( 1, 1, 0 ) )
         *m_process << "--log_no_color";
     *m_process << "-i" << dvd.device()->blockDeviceName();
     *m_process << "-T" << QString("%1,%2").arg(title).arg(chapter);
     if ( bin->version() < Version( 1, 1, 0 ) ) {
         *m_process << "-x" << "dvd,null";
         *m_process << "--dvd_access_delay" << "0";
     }
     else {
         *m_process << "-x" << "dvd='delay=0',null";
     }
     *m_process << "-y" << "ppm,null";
     *m_process << "-c" << QString("%1-%2").arg( frame ).arg( frame+1 );
     *m_process << "-Z" << "x200";
     *m_process << "-o" << m_tempDir->path();
 
     connect( m_process, SIGNAL(finished(int,QProcess::ExitStatus)),
              this, SLOT(slotTranscodeFinished(int,QProcess::ExitStatus)) );
     if ( !m_process->start(KProcess::ForwardedChannels) ) {
         // something went wrong when starting the program
         // it "should" be the executable
         qDebug() << "(K3b::VideoDVDRippingPreview) Could not start transcode.";
         m_process->deleteLater();
         m_process = 0;
         m_tempDir.reset();
         emit previewDone( false );
     }
 }
 
 
 void K3b::VideoDVDRippingPreview::cancel()
 {
     if( m_process && m_process->isRunning() ) {
         m_canceled = true;
         m_process->kill();
         m_process->waitForFinished();
     }
 }
 
 
 void K3b::VideoDVDRippingPreview::slotTranscodeFinished( int, QProcess::ExitStatus exitStatus)
 {
     if( exitStatus != QProcess::NormalExit )
         return;
 
     // read the image
     QString filename = QDir( m_tempDir->path() ).filePath( "000000.ppm" );// + tempQDir->entryList( QDir::Files ).first();
     qDebug() << "(K3b::VideoDVDRippingPreview) reading from file " << filename;
     m_preview = QImage( filename );
     bool success = !m_preview.isNull() && !m_canceled;
 
     // remove temp files
     m_tempDir.reset();
 
     // clean up
     m_process->deleteLater();
     m_process = 0;
 
     qDebug() << "Preview done:" << success;
 
     // retry the first chapter in case another failed
     if( !success && m_chapter > 1 )
         generatePreview( m_dvd, m_title, 1 );
     else
         emit previewDone( success );
 }
 
 #include "moc_k3bvideodvdrippingpreview.cpp"