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Dive media: on import read metadata only once

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On import of dive media, the timestamp is read from the
metadata to check if the image belongs to the selected dives.
The pictures are then listed in a dialog.

Currently, the metadata is read twice if images are outside
of a dive: once in picture_check_valid() and if it turns
out that the picture is not valid again in picture_get_time()
to display the proper timestamp.

Even though metadata-extraction is reasonably fast, this is
a bit of an embarrassment.

Instead, read the timestamps only once in the constructor of
the dialog and from then on only used these timestamps. Keep
the timestamps in a QVector. Rename the picture_check_valid()
function to picture_check_valid_time() and pass a timestamp
instead of a filename.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-09-17 17:34:13 +02:00 • committed by Dirk Hohndel
parent 92deb7aa70
commit 21b1550739
4 changed files with 16 additions and 12 deletions
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22
desktop-widgets/simplewidgets.cpp
View file

@ -354,6 +354,11 @@ ShiftImageTimesDialog::ShiftImageTimesDialog(QWidget *parent, QStringList fileNa
connect(ui.matchAllImages, SIGNAL(toggled(bool)), this, SLOT(matchAllImagesToggled(bool)));
dcImageEpoch = (time_t)0;
// Get times of all files. 0 means that the time couldn't be determined.
int numFiles = fileNames.size();
timestamps.resize(numFiles);
for (int i = 0; i < numFiles; ++i)
timestamps[i] = picture_get_timestamp(qPrintable(fileNames[i]));
updateInvalid();
}
@ -375,7 +380,6 @@ void ShiftImageTimesDialog::setOffset(time_t offset)
void ShiftImageTimesDialog::updateInvalid()
{
timestamp_t timestamp;
bool allValid = true;
ui.warningLabel->hide();
ui.invalidFilesText->hide();
@ -389,17 +393,17 @@ void ShiftImageTimesDialog::updateInvalid()
}
ui.invalidFilesText->append(tr("\nFiles with inappropriate date/time") + ":");
Q_FOREACH (const QString &fileName, fileNames) {
if (picture_check_valid(qPrintable(fileName), m_amount))
int numFiles = fileNames.size();
for (int i = 0; i < numFiles; ++i) {
if (picture_check_valid_time(timestamps[i], m_amount))
continue;
// We've found invalid image
timestamp = picture_get_timestamp(qPrintable(fileName));
time_first.setTime_t(timestamp + m_amount);
if (timestamp == 0)
ui.invalidFilesText->append(fileName + " - " + tr("No Exif date/time found"));
// We've found an invalid image
time_first.setTime_t(timestamps[i] + m_amount);
if (timestamps[i] == 0)
ui.invalidFilesText->append(fileNames[i] + " - " + tr("No Exif date/time found"));
else
ui.invalidFilesText->append(fileName + " - " + time_first.toString());
ui.invalidFilesText->append(fileNames[i] + " - " + time_first.toString());
allValid = false;
}