fate: add chroma position scale test

The sample position is made weird and non-nominal to force catching
such issues as default values or specialized operations hiding
issues in corner cases.

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

tests/fate/filter-video.mak

@@ -349,6 +349,10 @@ fate-filter-scale200: CMD = video_filter "scale=w=200:h=200"
 FATE_FILTER_VSYNTH-$(CONFIG_SCALE_FILTER) += fate-filter-scale500
 fate-filter-scale500: CMD = video_filter "scale=w=500:h=500"
 
+FATE_FILTER_VSYNTH-$(CONFIG_SCALE_FILTER) += fate-filter-scalechroma
+fate-filter-scalechroma: tests/data/vsynth1.yuv
+fate-filter-scalechroma: CMD = framecrc -flags bitexact -s 352x288 -pix_fmt yuv444p -i tests/data/vsynth1.yuv -pix_fmt yuv420p -sws_flags +bitexact -vf scale=out_v_chr_pos=33:out_h_chr_pos=151
+
 FATE_FILTER_VSYNTH-$(CONFIG_VFLIP_FILTER) += fate-filter-vflip
 fate-filter-vflip: CMD = video_filter "vflip"
 

tests/ref/fate/filter-scalechroma

@@ -0,0 +1,26 @@
+#tb 0: 1/25
+0,          0,          0,        1,   152064, 0xdcab783a
+0,          1,          1,        1,   152064, 0x79c7f1f6
+0,          2,          2,        1,   152064, 0x3b810afb
+0,          3,          3,        1,   152064, 0x892aca1d
+0,          4,          4,        1,   152064, 0x52fdd093
+0,          5,          5,        1,   152064, 0xaa643426
+0,          6,          6,        1,   152064, 0x9ad020ed
+0,          7,          7,        1,   152064, 0x5c179057
+0,          8,          8,        1,   152064, 0xa56bf155
+0,          9,          9,        1,   152064, 0x61dcffca
+0,         10,         10,        1,   152064, 0x0d51a1d3
+0,         11,         11,        1,   152064, 0x652f9e8d
+0,         12,         12,        1,   152064, 0xdc0bb4d8
+0,         13,         13,        1,   152064, 0x561437cf
+0,         14,         14,        1,   152064, 0x69ef8e4f
+0,         15,         15,        1,   152064, 0xe7244350
+0,         16,         16,        1,   152064, 0xe65651cf
+0,         17,         17,        1,   152064, 0xfc9ff646
+0,         18,         18,        1,   152064, 0x6ae10bc4
+0,         19,         19,        1,   152064, 0xd3d1898a
+0,         20,         20,        1,   152064, 0xf3f8b139
+0,         21,         21,        1,   152064, 0x68c129be
+0,         22,         22,        1,   152064, 0xc3922593
+0,         23,         23,        1,   152064, 0x2b14d96e
+0,         24,         24,        1,   152064, 0xab119489