1 files changed, 135 insertions, 0 deletions
diff --git a/src/rip/videodvd/k3bvideodvdrippingpreview.cpp b/src/rip/videodvd/k3bvideodvdrippingpreview.cpp
new file mode 100644
index 0000000..3ba7582
--- /dev/null
+++ b/src/rip/videodvd/k3bvideodvdrippingpreview.cpp
@@ -0,0 +1,135 @@
+/* 
+ *
+ * $Id: sourceheader 511311 2006-02-19 14:51:05Z trueg $
+ * Copyright (C) 2006 Sebastian Trueg <trueg@k3b.org>
+ *
+ * This file is part of the K3b project.
+ * Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.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.
+ * See the file "COPYING" for the exact licensing terms.
+ */
+
+#include "k3bvideodvdrippingpreview.h"
+
+#include <k3bcore.h>
+#include <k3bexternalbinmanager.h>
+#include <k3bdevice.h>
+
+#include <kprocess.h>
+#include <ktempdir.h>
+#include <kdebug.h>
+
+#include <qdir.h>
+
+
+
+K3bVideoDVDRippingPreview::K3bVideoDVDRippingPreview( QObject* parent )
+  : QObject( parent ),
+    m_tempDir( 0 ),
+    m_process( 0 )
+{
+}
+
+
+K3bVideoDVDRippingPreview::~K3bVideoDVDRippingPreview()
+{
+  delete m_process;
+  delete m_tempDir;
+}
+
+
+void K3bVideoDVDRippingPreview::generatePreview( const K3bVideoDVD::VideoDVD& dvd, int title, int chapter )
+{
+  // cleanup first
+  delete m_process;
+  delete m_tempDir;
+  m_process = 0;
+  m_tempDir = 0;
+  m_canceled = false;
+
+  const K3bExternalBin* 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, 2 ), QMAX( dvd[title-1].numChapters() - 1, 1 ) );
+
+  // 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 = new KTempDir();
+  m_tempDir->setAutoDelete( true );
+
+  m_process = new KProcess();
+  *m_process << bin->path;
+  *m_process << "-i" << dvd.device()->blockDeviceName();
+  *m_process << "-T" << QString("%1,%2").arg(title).arg(chapter);
+  *m_process << "-x" << "dvd,null";
+  *m_process << "--dvd_access_delay" << "0";
+  *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->name();
+
+  connect( m_process, SIGNAL(processExited(KProcess*)),
+	   this, SLOT(slotTranscodeFinished(KProcess*)) );
+  if( !m_process->start( KProcess::NotifyOnExit, KProcess::AllOutput ) ) { // we use AllOutput to not pollute stdout
+    // something went wrong when starting the program
+    // it "should" be the executable
+    kdDebug() << "(K3bVideoDVDRippingPreview) Could not start transcode." << endl;
+    delete m_process;
+    delete m_tempDir;
+    m_process = 0;
+    m_tempDir = 0;
+    emit previewDone( false );
+  }
+}
+
+
+void K3bVideoDVDRippingPreview::cancel()
+{
+  if( m_process && m_process->isRunning() ) {
+    m_canceled = true;
+    m_process->kill();
+  }
+}
+
+
+void K3bVideoDVDRippingPreview::slotTranscodeFinished( KProcess* )
+{
+  // read the image
+  QString filename = m_tempDir->name() + "000000.ppm";// + tempQDir->entryList( QDir::Files ).first();
+  kdDebug() << "(K3bVideoDVDRippingPreview) reading from file " << filename << endl;
+  m_preview = QImage( filename );
+  bool success = !m_preview.isNull() && !m_canceled;
+
+  // remove temp files
+  delete m_tempDir;
+  m_tempDir = 0;
+
+  // clean up
+  delete m_process;
+  m_process = 0;
+
+  // retry the first chapter in case another failed
+  if( !success && m_chapter > 1 )
+    generatePreview( m_dvd, m_title, 1 );
+  else
+    emit previewDone( success );
+}
+
+#include "k3bvideodvdrippingpreview.moc"