FATE: add a test for colorbalance

Tested on x86-32/64, mingw32/64, arm & mips qemu
Tested-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>

tests/fate/filter-video.mak

@@ -495,6 +495,18 @@ fate-filter-colorlevels: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf format=rgb24,c
 FATE_FILTER_VSYNTH-$(CONFIG_COLORLEVELS_FILTER) += fate-filter-colorlevels-16
 fate-filter-colorlevels-16: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf format=rgb48,colorlevels -pix_fmt rgb48le -flags +bitexact -sws_flags +accurate_rnd+bitexact
 
+FATE_FILTER_VSYNTH-$(CONFIG_COLORBALANCE_FILTER) += fate-filter-colorbalance
+fate-filter-colorbalance: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf format=rgb24,colorbalance=rs=.2 -flags +bitexact -sws_flags +accurate_rnd+bitexact -frames:v 3
+
+FATE_FILTER_VSYNTH-$(CONFIG_COLORBALANCE_FILTER) += fate-filter-colorbalance-gbrap
+fate-filter-colorbalance-gbrap: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf format=gbrap,colorbalance=gh=.2 -flags +bitexact -sws_flags +accurate_rnd+bitexact -frames:v 3
+
+FATE_FILTER_VSYNTH-$(CONFIG_COLORBALANCE_FILTER) += fate-filter-colorbalance-rgba64
+fate-filter-colorbalance-rgba64: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf format=rgba64,colorbalance=rm=.2 -pix_fmt rgba64le -flags +bitexact -sws_flags +accurate_rnd+bitexact -frames:v 3
+
+FATE_FILTER_VSYNTH-$(CONFIG_COLORBALANCE_FILTER) += fate-filter-colorbalance-gbrap-16
+fate-filter-colorbalance-gbrap-16: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf format=gbrap,colorbalance=bh=.2 -pix_fmt gbrap -flags +bitexact -sws_flags +accurate_rnd+bitexact -frames:v 3
+
 FATE_FILTER_VSYNTH-$(CONFIG_COLORMATRIX_FILTER) += fate-filter-colormatrix1
 fate-filter-colormatrix1: CMD = video_filter "colormatrix=bt601:smpte240m,colormatrix=smpte240m:fcc,colormatrix=fcc:bt601,colormatrix=bt601:fcc,colormatrix=fcc:smpte240m,colormatrix=smpte240m:bt709"
 

tests/ref/fate/filter-colorbalance

+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 352x288
+#sar 0: 0/1
+0,          0,          0,        1,   304128, 0x3451c8eb
+0,          1,          1,        1,   304128, 0x2107daa0
+0,          2,          2,        1,   304128, 0xcda7aa33

tests/ref/fate/filter-colorbalance-gbrap

+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 352x288
+#sar 0: 0/1
+0,          0,          0,        1,   405504, 0xad0f2d82
+0,          1,          1,        1,   405504, 0x81d7d31f
+0,          2,          2,        1,   405504, 0x40c5e836

tests/ref/fate/filter-colorbalance-gbrap-16

+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 352x288
+#sar 0: 0/1
+0,          0,          0,        1,   405504, 0xa97c136c
+0,          1,          1,        1,   405504, 0x0a120697
+0,          2,          2,        1,   405504, 0x85b133ff

tests/ref/fate/filter-colorbalance-rgba64

+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 352x288
+#sar 0: 0/1
+0,          0,          0,        1,   811008, 0xa67db91d
+0,          1,          1,        1,   811008, 0x0846578a
+0,          2,          2,        1,   811008, 0x77af61f8