Some formats use longer names than 12.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

In libswcale/tests/swcale.c, the function fileTest() calls sscanf in
an argument of "%12s" on character srcStr[] and dstStr[], which are
only 12 bytes.  So, if the input string is 12 characters, a
terminating null byte can be written past the end of these arrays.

This bug was found by cppcheck.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Lauri had asked me what the semi planar formats were and that reminded
me that we could add it to pixdesc_query so we know exactly what the
list is.

Fix CID 1415949

Fixes ticket #6554

This will be required for the next commit.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Test the pixel format querying within libswscale.

libswscale/swscale-test.c:369:20: warning: passing argument 2 of ‘sws_scale’ from incompatible pointer type [-Wincompatible-pointer-types]
libswscale/swscale.h:207:5: note: expected ‘const uint8_t * const* {aka const unsigned char * const*}’ but argument is of type ‘uint8_t ** {aka unsigned char **}’

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

They are internal symbols that should not be exported.

based on a patch by Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>