--- /dev/null
+/***************************************************************************
+ Copyright (C) 2006-2008
+ by Marco Gulino <marco@kmobiletools.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 <qfile.h>
+#include <qpixmap.h>
+#include <qimage.h>
+#include <QtCore/QVarLengthArray>
+
+#include <kstandarddirs.h>
+#include <kmimetype.h>
+#include <QDir>
+#include <qpainter.h>
+#include <krandomsequence.h>
+#include <qdatetime.h>
+#include <qregexp.h>
+#include <QProcess>
+#include <kdebug.h>
+#include <ktempdir.h>
+#include <kurl.h>
+#include <math.h>
+#include <qfileinfo.h>
+#include <kcodecs.h>
+#include <KTemporaryFile>
+
+#include <unistd.h>
+
+#include "westleypreview.h"
+
+#define DBG_AREA
+
+//#include "config.h"
+extern "C"
+{
+ KDE_EXPORT ThumbCreator *new_creator()
+ {
+ return new WestleyPreview;
+ }
+}
+
+WestleyPreview::WestleyPreview()
+{
+}
+
+WestleyPreview::~WestleyPreview()
+{
+ delete rand;
+ delete inigoprocess;
+}
+
+bool WestleyPreview::startAndWaitProcess(const QStringList &args) {
+ kDebug(DBG_AREA) << "westleypreview: starting process with args: " << args << endl;
+ inigoprocess->start( args.join(" ") );
+ if(! inigoprocess->waitForStarted() ) {
+ kDebug(DBG_AREA) << "westleypreview: PROCESS NOT STARTED!!! exiting\n";
+ return false;
+ }
+ if(! inigoprocess->waitForFinished() ) {
+ kDebug(DBG_AREA) << "westleypreview: PROCESS DIDN'T FINISH!! exiting\n";
+ inigoprocess->close();
+ return false;
+ }
+ kDebug() << "westleypreview: process started and ended correctly\n";
+ return true;
+}
+
+bool WestleyPreview::create(const QString &path, int width, int height, QImage &img)
+{
+ QFileInfo fi(path);
+ /*if (fi.suffix().trimmed() != "westley" && fi.suffix().trimmed() != "kdenlive")
+ {
+ kDebug(DBG_AREA) << "westleypreview: matched extension " << fi.suffix().prepend('.') << "; exiting.\n";
+ return false;
+ }*/
+ playerBin=KStandardDirs::findExe("inigo");
+ if(playerBin.isEmpty())
+ {
+ kDebug(DBG_AREA) << "westleypreview: inigo not found, exiting.\n";
+ return false;
+ }
+
+ fileinfo.seconds=0;
+ fileinfo.fps=0;
+
+ rand=new KRandomSequence(QDateTime::currentDateTime().toTime_t());
+ inigoprocess=new QProcess();
+ KUrl furl(path);
+ kDebug(DBG_AREA) << "videopreview: url=" << furl << "; local:" << furl.isLocalFile() << endl;
+ fileinfo.towidth=width;
+ fileinfo.toheight=height;
+ QPixmap pix;
+// if(furl.isLocalFile())
+// {
+ QStringList args;
+ //TODO: modify inigo so that it can return some infos about a westley clip (duration, track number,fps,...)
+ // without actually playing the file
+/*
+ args << playerBin << QString("\"" + path + "\"") << "-file-info";
+
+ kDebug(DBG_AREA) << "videopreview: starting process: --_" << " " << args.join(" ") << "_--\n";
+ if (! startAndWaitProcess(args) ) return NULL;
+
+ QString information=QString(inigoprocess->readAllStandardOutput() );
+ QRegExp findInfos("ID_VIDEO_FPS=([\\d]*).*ID_LENGTH=([\\d]*).*");
+ if(findInfos.indexIn( information) == -1 )
+ {
+ kDebug(DBG_AREA) << "videopreview: No information found, exiting\n";
+ return NULL;
+ }
+ fileinfo.seconds =findInfos.cap(2).toInt();
+ fileinfo.fps=findInfos.cap(1).toInt();
+ */
+ fileinfo.seconds = 250;
+ fileinfo.fps = 25;
+
+ //kDebug(DBG_AREA) << "videopreview: find length=" << fileinfo.seconds << ", fps=" << fileinfo.fps << endl;
+
+ const int LASTTRY = 3;
+ for(int i=0; i<=LASTTRY; i++)
+ {
+ pix=getFrame(path);
+ if(!pix.isNull()) {
+ uint variance=imageVariance(pix.toImage()/*.bits(),( (width+ 7) & ~0x7), width, height, 1 */);
+ kDebug(DBG_AREA) << "videopreview: " << QFileInfo(path).fileName() << " frame variance: " << variance << "; " <<
+ ((variance<=40 && ( i!=LASTTRY-1))? "!!!DROPPING!!!" : "GOOD :-)" ) << endl;
+ if(variance>40 || i==LASTTRY-1 ) break;
+ }
+ }
+ if(pix.isNull() )
+ {
+ return false;
+ }
+ img = pix.toImage();
+ return true;
+}
+
+QPixmap WestleyPreview::getFrame(const QString &path)
+{
+ QStringList args;
+ #define START ((fileinfo.seconds*15)/100)
+ #define END ((fileinfo.seconds*70)/100)
+ args.clear();
+ args << playerBin << "\"" + path + "\"";
+ if(fileinfo.towidth>fileinfo.toheight) fileinfo.toheight=-2; else fileinfo.towidth=-2;
+// switch( flags ){
+// case random
+// }
+ unsigned long start=(unsigned long)(START+(rand->getDouble() * (END - START) ) );
+ args << QString("in=%1").arg(start)<< QString("out=%1").arg(start)<<"-consumer";
+
+ KTemporaryFile temp;
+ temp.setSuffix(".png");
+ temp.open();
+ args << QString("avformat:%1").arg(temp.fileName()) << "vframes=1"<< "f=rawvideo"<< "vcodec=png"<< QString("s=%1x%2").arg(fileinfo.towidth).arg(fileinfo.toheight);
+ if (! startAndWaitProcess(args) ) return NULL;
+ QPixmap retpix(temp.fileName());
+ temp.close();
+ return retpix;
+}
+
+
+uint WestleyPreview::imageVariance(QImage image )
+{
+ uint delta=0;
+ uint avg=0;
+ uint bytes=image.numBytes();
+ uint STEPS=bytes/2;
+ QVarLengthArray<uchar> pivot(STEPS);
+ kDebug(DBG_AREA) << "Using " << STEPS << " steps\n";
+ uchar *bits=image.bits();
+ // First pass: get pivots and taking average
+ for( uint i=0; i<STEPS ; i++ ){
+ pivot[i]=bits[i*(bytes/STEPS)];
+ avg+=pivot[i];
+ }
+ avg=avg/STEPS;
+ // Second Step: calculate delta (average?)
+ for (uint i=0; i<STEPS; i++)
+ {
+ int curdelta=abs(int(avg-pivot[i]));
+ delta+=curdelta;
+ }
+ return delta/STEPS;
+}
+#include "westleypreview.moc"
+
--- /dev/null
+/***************************************************************************
+ Copyright (C) 2006-2008
+ by Marco Gulino <marco@kmobiletools.org>
+ adapted for MLT video preview by Jean-Baptiste Mardelle <jb@kdenlive.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.
+ ***************************************************************************/
+
+
+#ifndef _westleypreview_H_
+#define _westleypreview_H_
+
+#include <qstring.h>
+#include <q3cstring.h>
+
+#include <qpixmap.h>
+#include <kio/thumbcreator.h>
+
+class QProcess;
+class Q3CString;
+class KTempDir;
+class KRandomSequence;
+#include <qobject.h>
+
+
+
+class WestleyPreview : public QObject, public ThumbCreator
+{
+Q_OBJECT
+ public:
+ WestleyPreview();
+ virtual ~WestleyPreview();
+ virtual bool create(const QString &path, int width, int height, QImage &img);
+ protected:
+ QPixmap getFrame(const QString &path);
+ static uint imageVariance(QImage image );
+
+ private:
+ QPixmap m_pixmap;
+ QProcess *inigoprocess;
+ QStringList customargs;
+ KRandomSequence *rand;
+ QString playerBin;
+ bool startAndWaitProcess(const QStringList &args);
+ enum frameflags { framerandom=0x1, framestart=0x2, frameend=0x4 };
+ struct { int towidth; int toheight; int fps; int seconds; } fileinfo;
+};
+
+#endif
projects / kdenlive / commitdiff