[Bug 691687] New: GstImageType documentation is misleading

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=691687
  GStreamer | gst-plugins-base | git

           Summary: GstImageType documentation is misleading
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: dv at pseudoterminal.org
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


According to
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-gsttag.html#GstTagImageType
, the image type is stored as part of the caps structure. This is wrong though.
Taken from tags.c:

  if (image_type != GST_TAG_IMAGE_TYPE_NONE) {
    GST_LOG ("Setting image type: %d", image_type);
    image_info = gst_structure_new ("GstTagImageInfo",
        "image-type", GST_TYPE_TAG_IMAGE_TYPE, image_type, NULL);
  }
  sample = gst_sample_new (image, caps, NULL, image_info);

so, the actual way to find out the image type is to use gst_sample_get_info().

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