fate: add test for realtime ccaption decoder

tests/fate/subtitles.mak

@@ -4,6 +4,9 @@ fate-sub-aqtitle: CMD = fmtstdout ass -sub_charenc windows-1250 -i $(TARGET_SAMP
 FATE_SUBTITLES_ASS-$(call ALLYES, AVDEVICE LAVFI_INDEV CCAPTION_DECODER MOVIE_FILTER MPEGTS_DEMUXER) += fate-sub-cc
 fate-sub-cc: CMD = fmtstdout ass -f lavfi -i "movie=$(TARGET_SAMPLES)/sub/Closedcaption_rollup.m2v[out0+subcc]"
 
+FATE_SUBTITLES_ASS-$(call ALLYES, AVDEVICE LAVFI_INDEV CCAPTION_DECODER MOVIE_FILTER MPEGTS_DEMUXER) += fate-sub-cc-realtime
+fate-sub-cc-realtime: CMD = fmtstdout ass -real_time 1 -f lavfi -i "movie=$(TARGET_SAMPLES)/sub/Closedcaption_rollup.m2v[out0+subcc]"
+
 FATE_SUBTITLES_ASS-$(call DEMDEC, ASS, ASS) += fate-sub-ass-to-ass-transcode
 fate-sub-ass-to-ass-transcode: CMD = fmtstdout ass -i $(TARGET_SAMPLES)/sub/1ededcbd7b.ass
 

tests/ref/fate/sub-cc-realtime

+[Script Info]
+; Script generated by FFmpeg/Lavc
+ScriptType: v4.00+
+PlayResX: 384
+PlayResY: 288
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Monospace,16,&Hffffff,&Hffffff,&H0,&H0,0,0,0,0,100,100,0,0,3,1,0,2,10,10,10,0
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:14.14,9:59:59.99,Default,,0,0,0,,(
+Dialogue: 0,0:00:15.47,9:59:59.99,Default,,0,0,0,,({\i1} in
+Dialogue: 0,0:00:15.92,9:59:59.99,Default,,0,0,0,,({\i1} inau
+Dialogue: 0,0:00:16.36,9:59:59.99,Default,,0,0,0,,({\i1} inaudi
+Dialogue: 0,0:00:16.81,9:59:59.99,Default,,0,0,0,,({\i1} inaudibl
+Dialogue: 0,0:00:17.25,9:59:59.99,Default,,0,0,0,,({\i1} inaudible 
+Dialogue: 0,0:00:17.70,9:59:59.99,Default,,0,0,0,,({\i1} inaudible ra
+Dialogue: 0,0:00:18.14,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radi
+Dialogue: 0,0:00:18.59,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio 
+Dialogue: 0,0:00:19.03,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio ch
+Dialogue: 0,0:00:19.48,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chat
+Dialogue: 0,0:00:19.92,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatte
+Dialogue: 0,0:00:20.36,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter
+Dialogue: 0,0:00:21.70,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )
+Dialogue: 0,0:00:42.61,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>>
+Dialogue: 0,0:00:43.05,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> S
+Dialogue: 0,0:00:43.50,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Saf
+Dialogue: 0,0:00:43.94,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safet
+Dialogue: 0,0:00:44.39,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety 
+Dialogue: 0,0:00:44.83,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety re
+Dialogue: 0,0:00:45.28,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety rema
+Dialogue: 0,0:00:45.72,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remain
+Dialogue: 0,0:00:46.17,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remains 
+Dialogue: 0,0:00:46.61,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remains ou
+Dialogue: 0,0:00:47.06,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remains our 
+Dialogue: 0,0:00:47.50,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remains our nu
+Dialogue: 0,0:00:47.95,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remains our numb
+Dialogue: 0,0:00:48.39,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remains our number
+Dialogue: 0,0:00:48.84,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remains our number o
+Dialogue: 0,0:00:49.28,9:59:59.99,Default,,0,0,0,,({\i1} inaudible radio chatter{\i0} )\N>> Safety remains our number one