fate: add h264-direct-bff test

tests/fate/h264.mak

@@ -186,6 +186,7 @@ FATE_H264-$(call DEMDEC, H264, H264) += $(FATE_H264)
 FATE_H264-$(call DEMDEC,  MOV, H264) += fate-h264-crop-to-container
 FATE_H264-$(call DEMDEC,  MOV, H264) += fate-h264-interlace-crop
 FATE_H264-$(call ALLYES, MOV_DEMUXER H264_MP4TOANNEXB_BSF) += fate-h264-bsf-mp4toannexb
+FATE_H264-$(call DEMDEC, MATROSKA, H264) += fate-h264-direct-bff
 
 FATE_SAMPLES_AVCONV += $(FATE_H264-yes)
 fate-h264: $(FATE_H264-yes)
@@ -369,5 +370,6 @@ fate-h264-crop-to-container:                      CMD = framemd5 -i $(TARGET_SAM
 fate-h264-extreme-plane-pred:                     CMD = framemd5 -i $(TARGET_SAMPLES)/h264/extreme-plane-pred.h264
 fate-h264-interlace-crop:                         CMD = framecrc -i $(TARGET_SAMPLES)/h264/interlaced_crop.mp4 -vframes 3
 fate-h264-lossless:                               CMD = framecrc -i $(TARGET_SAMPLES)/h264/lossless.h264
+fate-h264-direct-bff:                             CMD = framecrc -i $(TARGET_SAMPLES)/h264/direct-bff.mkv
 
 fate-h264-reinit-%:                               CMD = framecrc -i $(TARGET_SAMPLES)/h264/$(@:fate-h264-%=%).h264 -vf format=yuv444p10le,scale=w=352:h=288

tests/ref/fate/h264-direct-bff

+#tb 0: 1/1000
+0,          0,          0,        0,   522720, 0x1ccad503
+0,         33,         33,        0,   522720, 0xd266d6e8
+0,         67,         67,        0,   522720, 0x535473b3
+0,        100,        100,        0,   522720, 0xf8b53c53
+0,        133,        133,        0,   522720, 0x4e4cc04b
+0,        167,        167,        0,   522720, 0x20ea3515
+0,        200,        200,        0,   522720, 0xb9c67e30
+0,        233,        233,        0,   522720, 0x03d2e35a
+0,        267,        267,        0,   522720, 0xae2e7896
+0,        300,        300,        0,   522720, 0x6da37f41
+0,        400,        400,        0,   522720, 0x7caf4954