A #GstObject that will be passed as first argument to @func
the parent of @obj or %NULL
A generic #GstTypeFindHelperGetRangeFunction that will be used to access data at random offsets when doing the typefinding
The length in bytes
extension of the media, or %NULL
location to store the probability of the found caps, or %NULL
the #GstCaps corresponding to the data stream. Returns %NULL if no #GstCaps matches the data stream.
Utility function to do pull-based typefinding. Unlike gst_type_find_helper() however, this function will use the specified function @func to obtain the data needed by the typefind functions, rather than operating on a given source pad. This is useful mostly for elements like tag demuxers which strip off data at the beginning and/or end of a file and want to typefind the stripped data stream before adding their own source pad (the specified callback can then call the upstream peer pad with offsets adjusted for the tag size, for example).
When @extension is not %NULL, this function will first try the typefind functions for the given extension, which might speed up the typefinding in many cases.
Free-function: gst_caps_unref