v4l2src: add a comment about a "hidden" assumption on rank values

https://bugzilla.gnome.org/show_bug.cgi?id=665387
This commit is contained in:
Vincent Penquerc'h 2011-12-02 12:01:22 +00:00
parent f18f238968
commit 1e974b1581

View file

@ -893,6 +893,8 @@ gst_v4l2_object_get_format_from_fourcc (GstV4l2Object * v4l2object,
/* complete made up ranking, the values themselves are meaningless */ /* complete made up ranking, the values themselves are meaningless */
/* These ranks MUST be X such that X<<15 fits on a signed int - see
the comment at the end of gst_v4l2_object_format_get_rank. */
#define YUV_BASE_RANK 1000 #define YUV_BASE_RANK 1000
#define JPEG_BASE_RANK 500 #define JPEG_BASE_RANK 500
#define DV_BASE_RANK 200 #define DV_BASE_RANK 200