void *PreviewGenerator::PreviewRun(void *param)
{
// Lower scheduling priority, to avoid problems with recordings.
if (setpriority(PRIO_PROCESS, 0, 9))
VERBOSE(VB_IMPORTANT, LOC + "Setting priority failed." + ENO);
PreviewGenerator *gen = (PreviewGenerator*) param;
gen->createSockets = true;
gen->Run();
gen->deleteLater();
return NULL;
}
QFileInfo Content::GetPreviewImage( int nChanId,
const QDateTime &recstarttsRaw,
int nWidth,
int nHeight,
int nSecsIn )
{
if (!recstarttsRaw.isValid())
{
QString sMsg = QString("GetPreviewImage: bad start time '%1'")
.arg(MythDate::toString(recstarttsRaw, MythDate::ISODate));
LOG(VB_GENERAL, LOG_ERR, sMsg);
throw sMsg;
}
QDateTime recstartts = recstarttsRaw.toUTC();
// ----------------------------------------------------------------------
// Read Recording From Database
// ----------------------------------------------------------------------
ProgramInfo pginfo( (uint)nChanId, recstartts);
if (!pginfo.GetChanID())
{
LOG(VB_GENERAL, LOG_ERR,
QString("GetPreviewImage: No recording for '%1'")
.arg(ProgramInfo::MakeUniqueKey(nChanId, recstartts)));
return QFileInfo();
}
if (pginfo.GetHostname().toLower() != gCoreContext->GetHostName().toLower())
{
QString sMsg =
QString("GetPreviewImage: Wrong Host '%1' request from '%2'")
.arg( gCoreContext->GetHostName())
.arg( pginfo.GetHostname() );
LOG(VB_UPNP, LOG_ERR, sMsg);
throw HttpRedirectException( pginfo.GetHostname() );
}
QString sFileName = GetPlaybackURL(&pginfo);
// ----------------------------------------------------------------------
// check to see if default preview image is already created.
// ----------------------------------------------------------------------
QString sPreviewFileName;
if (nSecsIn <= 0)
{
nSecsIn = -1;
sPreviewFileName = sFileName + ".png";
}
else
{
sPreviewFileName = QString("%1.%2.png").arg(sFileName).arg(nSecsIn);
}
if (!QFile::exists( sPreviewFileName ))
{
// ------------------------------------------------------------------
// Must generate Preview Image, Generate Image and save.
// ------------------------------------------------------------------
if (!pginfo.IsLocal() && sFileName.startsWith("/"))
pginfo.SetPathname(sFileName);
if (!pginfo.IsLocal())
return QFileInfo();
PreviewGenerator *previewgen = new PreviewGenerator( &pginfo,
QString(),
PreviewGenerator::kLocal);
previewgen->SetPreviewTimeAsSeconds( nSecsIn );
previewgen->SetOutputFilename ( sPreviewFileName );
bool ok = previewgen->Run();
previewgen->deleteLater();
if (!ok)
return QFileInfo();
}
float fAspect = 0.0;
QImage *pImage = new QImage(sPreviewFileName);
if (!pImage)
return QFileInfo();
if (fAspect <= 0)
fAspect = (float)(pImage->width()) / pImage->height();
if (fAspect == 0)
{
delete pImage;
return QFileInfo();
}
bool bDefaultPixmap = (nWidth == 0) && (nHeight == 0);
if ( nWidth == 0 )
nWidth = (int)rint(nHeight * fAspect);
if ( nHeight == 0 )
nHeight = (int)rint(nWidth / fAspect);
QString sNewFileName;
if (bDefaultPixmap)
sNewFileName = sPreviewFileName;
else
sNewFileName = QString( "%1.%2.%3x%4.png" )
.arg( sFileName )
.arg( nSecsIn )
.arg( nWidth )
.arg( nHeight );
// ----------------------------------------------------------------------
// check to see if scaled preview image is already created.
// ----------------------------------------------------------------------
if (QFile::exists( sNewFileName ))
{
delete pImage;
return QFileInfo( sNewFileName );
}
PreviewGenerator *previewgen = new PreviewGenerator( &pginfo,
QString(),
PreviewGenerator::kLocal);
previewgen->SetPreviewTimeAsSeconds( nSecsIn );
previewgen->SetOutputFilename ( sNewFileName );
previewgen->SetOutputSize (QSize(nWidth,nHeight));
bool ok = previewgen->Run();
previewgen->deleteLater();
if (!ok)
return QFileInfo();
delete pImage;
return QFileInfo( sNewFileName );
}
QFileInfo Content::GetPreviewImage( int nRecordedId,
int nChanId,
const QDateTime &recstarttsRaw,
int nWidth,
int nHeight,
int nSecsIn,
const QString &sFormat )
{
if ((nRecordedId <= 0) &&
(nChanId <= 0 || !recstarttsRaw.isValid()))
throw QString("Recorded ID or Channel ID and StartTime appears invalid.");
if (!sFormat.isEmpty()
&& !QImageWriter::supportedImageFormats().contains(sFormat.toLower().toLocal8Bit()))
{
throw "GetPreviewImage: Specified 'Format' is not supported.";
}
// ----------------------------------------------------------------------
// Read Recording From Database
// ----------------------------------------------------------------------
// TODO Should use RecordingInfo
ProgramInfo pginfo;
if (nRecordedId > 0)
pginfo = ProgramInfo(nRecordedId);
else
pginfo = ProgramInfo(nChanId, recstarttsRaw.toUTC());
if (!pginfo.GetChanID())
{
LOG(VB_GENERAL, LOG_ERR,
QString("GetPreviewImage: No recording for '%1'")
.arg(nRecordedId));
return QFileInfo();
}
if (pginfo.GetHostname().toLower() != gCoreContext->GetHostName().toLower())
{
QString sMsg =
QString("GetPreviewImage: Wrong Host '%1' request from '%2'")
.arg( gCoreContext->GetHostName())
.arg( pginfo.GetHostname() );
LOG(VB_UPNP, LOG_ERR, sMsg);
throw HttpRedirectException( pginfo.GetHostname() );
}
QString sImageFormat = sFormat;
if (sImageFormat.isEmpty())
sImageFormat = "PNG";
QString sFileName = GetPlaybackURL(&pginfo);
// ----------------------------------------------------------------------
// check to see if default preview image is already created.
// ----------------------------------------------------------------------
QString sPreviewFileName;
if (nSecsIn <= 0)
{
nSecsIn = -1;
sPreviewFileName = QString("%1.png").arg(sFileName);
}
else
{
sPreviewFileName = QString("%1.%2.png").arg(sFileName).arg(nSecsIn);
}
if (!QFile::exists( sPreviewFileName ))
{
// ------------------------------------------------------------------
// Must generate Preview Image, Generate Image and save.
// ------------------------------------------------------------------
if (!pginfo.IsLocal() && sFileName.startsWith("/"))
pginfo.SetPathname(sFileName);
if (!pginfo.IsLocal())
return QFileInfo();
PreviewGenerator *previewgen = new PreviewGenerator( &pginfo,
QString(),
PreviewGenerator::kLocal);
previewgen->SetPreviewTimeAsSeconds( nSecsIn );
previewgen->SetOutputFilename ( sPreviewFileName );
bool ok = previewgen->Run();
previewgen->deleteLater();
if (!ok)
return QFileInfo();
}
bool bDefaultPixmap = (nWidth == 0) && (nHeight == 0);
QString sNewFileName;
if (bDefaultPixmap)
sNewFileName = sPreviewFileName;
else
{
sNewFileName = QString( "%1.%2.%3x%4.%5" )
.arg( sFileName )
.arg( nSecsIn )
.arg( nWidth == 0 ? -1 : nWidth )
.arg( nHeight == 0 ? -1 : nHeight )
.arg( sImageFormat.toLower() );
// ----------------------------------------------------------------------
// check to see if scaled preview image is already created and isn't
// out of date
// ----------------------------------------------------------------------
if (QFile::exists( sNewFileName ))
{
if (QFileInfo(sPreviewFileName).lastModified() <=
QFileInfo(sNewFileName).lastModified())
return QFileInfo( sNewFileName );
}
QImage image = QImage(sPreviewFileName);
if (image.isNull())
return QFileInfo();
// We can just re-scale the default (full-size version) to avoid
// a preview generator run
if ( nWidth <= 0 )
image = image.scaledToHeight(nHeight, Qt::SmoothTransformation);
else if ( nHeight <= 0 )
image = image.scaledToWidth(nWidth, Qt::SmoothTransformation);
else
image = image.scaled(nWidth, nHeight, Qt::IgnoreAspectRatio,
Qt::SmoothTransformation);
image.save(sNewFileName, sImageFormat.toUpper().toLocal8Bit());
// Let anybody update it
bool ret = makeFileAccessible(sNewFileName.toLocal8Bit().constData());
if (!ret)
{
LOG(VB_GENERAL, LOG_ERR, "Unable to change permissions on "
"preview image. Backends and frontends "
"running under different users will be "
"unable to access it");
}
}
if (QFile::exists( sNewFileName ))
return QFileInfo( sNewFileName );
PreviewGenerator *previewgen = new PreviewGenerator( &pginfo,
QString(),
PreviewGenerator::kLocal);
previewgen->SetPreviewTimeAsSeconds( nSecsIn );
previewgen->SetOutputFilename ( sNewFileName );
previewgen->SetOutputSize (QSize(nWidth,nHeight));
bool ok = previewgen->Run();
previewgen->deleteLater();
if (!ok)
return QFileInfo();
return QFileInfo( sNewFileName );
}