tests/fate: add tests for PNG side/meta data

tests/fate/image.mak

@@ -358,6 +358,14 @@ $(foreach CLSP,$(PNG_COLORSPACES),$(eval $(call FATE_IMGSUITE_PNG,$(CLSP))))
 FATE_PNG += fate-png-int-rgb24
 fate-png-int-rgb24: CMD = framecrc -i $(TARGET_SAMPLES)/png1/lena-int_rgb24.png -sws_flags +accurate_rnd+bitexact
 
+FATE_PNG += fate-png-frame-metadata
+fate-png-frame-metadata: CMD = run ffprobe$(PROGSSUF)$(EXESUF) -show_entries frame_tags \
+    -i $(TARGET_SAMPLES)/filter/pixelart0.png
+
+FATE_PNG += fate-png-side-data
+fate-png-side-data: CMD = run ffprobe$(PROGSSUF)$(EXESUF) -show_frames \
+    -i $(TARGET_SAMPLES)/png1/lena-int_rgb24.png
+
 FATE_PNG-$(call DEMDEC, IMAGE2, PNG) += $(FATE_PNG)
 FATE_IMAGE += $(FATE_PNG-yes)
 fate-png: $(FATE_PNG-yes)

tests/ref/fate/png-frame-metadata

@@ -0,0 +1,4 @@
+[FRAME]
+TAG:gamma=45455/100000
+TAG:Software=GLDPNG ver 3.4
+[/FRAME]

tests/ref/fate/png-side-data

@@ -0,0 +1,46 @@
+[FRAME]
+media_type=video
+stream_index=0
+key_frame=1
+pkt_pts=0
+pkt_pts_time=0.000000
+pkt_dts=0
+pkt_dts_time=0.000000
+best_effort_timestamp=0
+best_effort_timestamp_time=0.000000
+pkt_duration=1
+pkt_duration_time=0.040000
+pkt_pos=0
+pkt_size=40194
+width=128
+height=128
+pix_fmt=rgb24
+sample_aspect_ratio=1:1
+pict_type=I
+coded_picture_number=0
+display_picture_number=0
+interlaced_frame=1
+top_field_first=0
+repeat_pict=0
+color_range=pc
+color_space=unknown
+color_primaries=unknown
+color_transfer=unknown
+chroma_location=unspecified
+[SIDE_DATA]
+side_data_type=ICC profile
+name=Photoshop ICC profile
+size=3144
+[/SIDE_DATA]
+[SIDE_DATA]
+side_data_type=Mastering display metadata
+red_x=63999/100000
+red_y=33001/100000
+green_x=30000/100000
+green_y=60000/100000
+blue_x=15000/100000
+blue_y=5999/100000
+white_point_x=31269/100000
+white_point_y=32899/100000
+[/SIDE_DATA]
+[/FRAME]