fate: add test for extrastereo filter

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

tests/fate/filter-audio.mak

@@ -109,6 +109,11 @@ fate-filter-earwax: tests/data/asynth-44100-2.wav
 fate-filter-earwax: SRC = $(TARGET_PATH)/tests/data/asynth-44100-2.wav
 fate-filter-earwax: CMD = framecrc -i $(SRC) -aframes 20 -af earwax
 
+FATE_AFILTER-$(call FILTERDEMDECENCMUX, EXTRASTEREO, WAV, PCM_S16LE, PCM_S16LE, WAV) += fate-filter-extrastereo
+fate-filter-extrastereo: tests/data/asynth-44100-2.wav
+fate-filter-extrastereo: SRC = $(TARGET_PATH)/tests/data/asynth-44100-2.wav
+fate-filter-extrastereo: CMD = framecrc -i $(SRC) -aframes 20 -af extrastereo=m=2
+
 tests/data/hls-list.m3u8: TAG = GEN
 tests/data/hls-list.m3u8: ffmpeg$(PROGSSUF)$(EXESUF) | tests/data
 	$(M)$(TARGET_EXEC) $(TARGET_PATH)/$< \

tests/ref/fate/filter-extrastereo

@@ -0,0 +1,25 @@
+#tb 0: 1/44100
+#media_type 0: audio
+#codec_id 0: pcm_s16le
+#sample_rate 0: 44100
+#channel_layout 0: 3
+0,          0,          0,     1024,     4096, 0x29e3eecf
+0,       1024,       1024,     1024,     4096, 0x18390b96
+0,       2048,       2048,     1024,     4096, 0xc477fa99
+0,       3072,       3072,     1024,     4096, 0x3bc0f14f
+0,       4096,       4096,     1024,     4096, 0x2379ed91
+0,       5120,       5120,     1024,     4096, 0xfd6a0070
+0,       6144,       6144,     1024,     4096, 0x0b01f4cf
+0,       7168,       7168,     1024,     4096, 0x6716fd93
+0,       8192,       8192,     1024,     4096, 0x1840f25b
+0,       9216,       9216,     1024,     4096, 0x9c1ffaf1
+0,      10240,      10240,     1024,     4096, 0xcbedefaf
+0,      11264,      11264,     1024,     4096, 0x3e050390
+0,      12288,      12288,     1024,     4096, 0xb30e0090
+0,      13312,      13312,     1024,     4096, 0x26b8f75b
+0,      14336,      14336,     1024,     4096, 0xd706e311
+0,      15360,      15360,     1024,     4096, 0x0c480138
+0,      16384,      16384,     1024,     4096, 0x6c9a0216
+0,      17408,      17408,     1024,     4096, 0x7abce54f
+0,      18432,      18432,     1024,     4096, 0xda45f63f
+0,      19456,      19456,     1024,     4096, 0x50d5ff87