avcodec/hevc_sei: Support HEVC paired fields.

Correctly set the interlaced_frame and top_field_first fields when pic_struct
indicates paired fields.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/hevc_sei.c

@@ -137,10 +137,10 @@ static int decode_nal_sei_pic_timing(HEVCSEIContext *s, GetBitContext *gb, const
     if (sps->vui.frame_field_info_present_flag) {
         int pic_struct = get_bits(gb, 4);
         h->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
-        if (pic_struct == 2) {
+        if (pic_struct == 2 || pic_struct == 10 || pic_struct == 12) {
             av_log(logctx, AV_LOG_DEBUG, "BOTTOM Field\n");
             h->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
-        } else if (pic_struct == 1) {
+        } else if (pic_struct == 1 || pic_struct == 9 || pic_struct == 11) {
             av_log(logctx, AV_LOG_DEBUG, "TOP Field\n");
             h->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
         }

tests/fate/hevc.mak

@@ -225,6 +225,9 @@ $(foreach N,$(HEVC_SAMPLES_444_12BIT),$(eval $(call FATE_HEVC_TEST_444_12BIT,$(N
 fate-hevc-paramchange-yuv420p-yuv420p10: CMD = framecrc -vsync 0 -i $(TARGET_SAMPLES)/hevc/paramchange_yuv420p_yuv420p10.hevc -sws_flags area+accurate_rnd+bitexact
 FATE_HEVC += fate-hevc-paramchange-yuv420p-yuv420p10
 
+fate-hevc-paired-fields: CMD = probeframes -show_entries frame=interlaced_frame,top_field_first $(TARGET_SAMPLES)/hevc/paired_fields.hevc
+FATE_HEVC_FFPROBE-$(call DEMDEC, HEVC, HEVC) += fate-hevc-paired-fields
+
 tests/data/hevc-mp4.mov: TAG = GEN
 tests/data/hevc-mp4.mov: ffmpeg$(PROGSSUF)$(EXESUF) | tests/data
 	$(M)$(TARGET_EXEC) $(TARGET_PATH)/$< \
@@ -244,5 +247,6 @@ FATE_HEVC-$(call DEMDEC, MOV, HEVC) += fate-hevc-extradata-reload
 fate-hevc-extradata-reload: CMD = framemd5 -i $(TARGET_SAMPLES)/hevc/extradata-reload-multi-stsd.mov -sws_flags bitexact
 
 FATE_SAMPLES_AVCONV += $(FATE_HEVC-yes)
+FATE_SAMPLES_FFPROBE += $(FATE_HEVC_FFPROBE-yes)
 
-fate-hevc: $(FATE_HEVC-yes)
+fate-hevc: $(FATE_HEVC-yes) $(FATE_HEVC_FFPROBE-yes)

tests/ref/fate/hevc-paired-fields

+[FRAME]
+interlaced_frame=1
+top_field_first=1
+[/FRAME]
+[FRAME]
+interlaced_frame=1
+top_field_first=0
+[/FRAME]
+[FRAME]
+interlaced_frame=1
+top_field_first=1
+[/FRAME]
+[FRAME]
+interlaced_frame=1
+top_field_first=0
+[/FRAME]