fate: add tpad filter tests

tests/fate/filter-video.mak

@@ -390,6 +390,10 @@ fate-filter-tblend: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf tblend=all_mode=dif
 FATE_FILTER_VSYNTH-$(CONFIG_TELECINE_FILTER) += fate-filter-telecine
 fate-filter-telecine: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf telecine
 
+FATE_FILTER-$(call ALLYES, TESTSRC2_FILTER TPAD_FILTER) += fate-filter-tpad-add fate-filter-tpad-clone
+fate-filter-tpad-add:   CMD = framecrc -lavfi testsrc2=d=1:r=2,tpad=start=1:stop=3:color=gray
+fate-filter-tpad-clone: CMD = framecrc -lavfi testsrc2=d=1:r=2,tpad=start=1:stop=2:stop_mode=clone:color=black
+
 FATE_FILTER_VSYNTH-$(CONFIG_TRANSPOSE_FILTER) += fate-filter-transpose
 fate-filter-transpose: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf transpose
 

tests/ref/fate/filter-tpad-add

@@ -0,0 +1,11 @@
+#tb 0: 1/2
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 320x240
+#sar 0: 1/1
+0,          0,          0,        1,   115200, 0x2213b502
+0,          1,          1,        1,   115200, 0x3744b3ed
+0,          2,          2,        1,   115200, 0x6e318ba0
+0,          3,          3,        1,   115200, 0x2213b502
+0,          4,          4,        1,   115200, 0x2213b502
+0,          5,          5,        1,   115200, 0x2213b502

tests/ref/fate/filter-tpad-clone

@@ -0,0 +1,10 @@
+#tb 0: 1/2
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 320x240
+#sar 0: 1/1
+0,          0,          0,        1,   115200, 0x375ec573
+0,          1,          1,        1,   115200, 0x3744b3ed
+0,          2,          2,        1,   115200, 0x6e318ba0
+0,          3,          3,        1,   115200, 0x6e318ba0
+0,          4,          4,        1,   115200, 0x6e318ba0