AVDemuxer mediastatus after unload call?

[Gilles Caulier]

Looking in source code :

mediastatus() return an internal variable based on MediaStatus enum :

https://invent.kde.org/graphics/digikam/-/blob/master/core/libs/video/qtav/ffmpeg/AVDemuxer.cpp#L660

Defined here :

https://invent.kde.org/graphics/digikam/-/blob/master/core/libs/video/qtav/utils/QtAV_Global.h#L76

So the private value of AVDemuxer::Private::media_status is only
changed in class by the provate method AVDemuxer::setMediaStatus(),
which is called only in AVDemuxer. So to hack; all must be located in
the class, including a bug if any...

Gilles

Le dim. 18 sept. 2022 à 01:19, Steven Robbins <steve at sumost.ca> a écrit :
>
> Looking for a sanity check on my understanding.  I've written a test case (see
> below) that passes.  What puzzles me is that the call to mediaStatus() returns
> "LoadedMedia" after a call to unload().  Is that correct?
>
>
>     void status()
>     {
>         AVDemuxer demux;
>         QCOMPARE(demux.mediaStatus(), MediaStatus::NoMedia);
>         QCOMPARE(demux.atEnd(), false);
>         QCOMPARE(demux.fileName(), QLatin1String(""));
>         QCOMPARE(demux.isLoaded(), false);
>
>         QVERIFY(demux.setMedia(testFile1()));
>         QCOMPARE(demux.mediaStatus(), MediaStatus::NoMedia);
>         QCOMPARE(demux.atEnd(), false);
>         QCOMPARE(demux.fileName(), testFile1());
>         QCOMPARE(demux.isLoaded(), false);
>
>         QVERIFY(demux.load());
>         QCOMPARE(demux.mediaStatus(), MediaStatus::LoadedMedia);
>         QCOMPARE(demux.atEnd(), false);
>         QCOMPARE(demux.fileName(), testFile1());
>         QCOMPARE(demux.isLoaded(), true);
>
>         QVERIFY(demux.unload());
>         QCOMPARE(demux.mediaStatus(), MediaStatus::LoadedMedia);  // ??? why
> status shows loaded?
>         QCOMPARE(demux.atEnd(), false);
>         QCOMPARE(demux.fileName(), testFile1());
>         QCOMPARE(demux.isLoaded(), false);
>     }
>