FATE: add AC-3 and E-AC-3 encode/decode tests with fuzzy comparison

tests/fate/ac3.mak

@@ -28,5 +28,21 @@ fate-eac3-4: CMD = pcm -i $(SAMPLES)/eac3/serenity_english_5.1_1536_small.eac3
 fate-eac3-4: CMP = oneoff
 fate-eac3-4: REF = $(SAMPLES)/eac3/serenity_english_5.1_1536_small.pcm
 
+FATE_AC3 += fate-ac3-encode
+fate-ac3-encode: CMD = enc_dec_pcm ac3 s16le -c:a ac3 -b:a 128k
+fate-ac3-encode: CMP = stddev
+fate-ac3-encode: REF = $(SAMPLES)/audio-reference/luckynight_2ch_44kHz_s16.wav
+fate-ac3-encode: CMP_SHIFT = -1024
+fate-ac3-encode: CMP_TARGET = 399.62
+fate-ac3-encode: SIZE_TOLERANCE = 488
+
+FATE_AC3 += fate-eac3-encode
+fate-eac3-encode: CMD = enc_dec_pcm eac3 s16le -c:a eac3 -b:a 128k
+fate-eac3-encode: CMP = stddev
+fate-eac3-encode: REF = $(SAMPLES)/audio-reference/luckynight_2ch_44kHz_s16.wav
+fate-eac3-encode: CMP_SHIFT = -1024
+fate-eac3-encode: CMP_TARGET = 514.02
+fate-eac3-encode: SIZE_TOLERANCE = 488
+
 FATE_TESTS += $(FATE_AC3)
 fate-ac3: $(FATE_AC3)