fate: add more pix_fmt tests for pam

Signed-off-by: Paul B Mahol <onemda@gmail.com>

tests/lavf-regression.sh

@@ -240,6 +240,11 @@ fi
 
 if [ -n "$do_pam" ] ; then
 do_image_formats pam
+do_image_formats pam "-pix_fmt rgba"
+do_image_formats pam "-pix_fmt gray"
+do_image_formats pam "-pix_fmt gray16be"
+do_image_formats pam "-pix_fmt rgb48be"
+do_image_formats pam "-pix_fmt monob"
 fi
 
 if [ -n "$do_pcx" ] ; then

tests/ref/lavf/pam

 0dce5565222cf0f8b309467f279aecd2 *./tests/data/images/pam/02.pam
 ./tests/data/images/pam/%02d.pam CRC=0x6da01946
 304191 ./tests/data/images/pam/02.pam
+2ed31ca8d8de560afb3e0fd7a873cde5 *./tests/data/images/pam/02.pam
+./tests/data/images/pam/%02d.pam CRC=0xf07d29cd
+405573 ./tests/data/images/pam/02.pam
+587284e40b78accd54fa92fdb7ca29f4 *./tests/data/images/pam/02.pam
+./tests/data/images/pam/%02d.pam CRC=0x418d2963
+101445 ./tests/data/images/pam/02.pam
+ebd43e97839b2538a79f35757e84ffb0 *./tests/data/images/pam/02.pam
+./tests/data/images/pam/%02d.pam CRC=0x831a2963
+202823 ./tests/data/images/pam/02.pam
+032538f0313b4f240b44a5bef115f5bf *./tests/data/images/pam/02.pam
+./tests/data/images/pam/%02d.pam CRC=0x5984c023
+608321 ./tests/data/images/pam/02.pam
+e8bd9f1830e6a9db201386e96580f869 *./tests/data/images/pam/02.pam
+./tests/data/images/pam/%02d.pam CRC=0x65707c37
+101447 ./tests/data/images/pam/02.pam