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
returned caps
location to store the probability of the found caps, or NULL
the last GstFlowReturn from pulling a buffer or GST_FLOW_OK if typefinding was successful.
1.14.3
Utility function to do pull-based typefinding. Unlike TypeFind.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.