Initializes a #GstByteReader sub-reader instance to contain @size bytes of
data from the current position of @reader. This is useful to read chunked
formats and make sure that one doesn't read beyond the size of the sub-chunk.
Unlike gst_byte_reader_peek_sub_reader(), this function also modifies the
position of @reader and moves it forward by @size bytes.
Initializes a #GstByteReader sub-reader instance to contain @size bytes of data from the current position of @reader. This is useful to read chunked formats and make sure that one doesn't read beyond the size of the sub-chunk.
Unlike gst_byte_reader_peek_sub_reader(), this function also modifies the position of @reader and moves it forward by @size bytes.