fate: add test for stereotools filter

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

tests/fate/filter-audio.mak

@@ -118,6 +118,10 @@ FATE_AFILTER_SAMPLES-$(call FILTERDEMDECENCMUX, SILENCEREMOVE, WAV, PCM_S16LE, P
 fate-filter-silenceremove: SRC = $(TARGET_SAMPLES)/audio-reference/divertimenti_2ch_96kHz_s24.wav
 fate-filter-silenceremove: CMD = framecrc -i $(SRC) -aframes 30 -af silenceremove=0:0:0:-1:0:-90dB
 
+FATE_AFILTER_SAMPLES-$(call FILTERDEMDECENCMUX, STEREOTOOLS, WAV, PCM_S16LE, PCM_S16LE, WAV) += fate-filter-stereotools
+fate-filter-stereotools: SRC = $(TARGET_SAMPLES)/audio-reference/luckynight_2ch_44kHz_s16.wav
+fate-filter-stereotools: CMD = framecrc -i $(SRC) -aframes 20 -af stereotools=mlev=0.015625
+
 tests/data/hls-list.m3u8: TAG = GEN
 tests/data/hls-list.m3u8: ffmpeg$(PROGSSUF)$(EXESUF) | tests/data
 	$(M)$(TARGET_EXEC) $(TARGET_PATH)/$< \

tests/ref/fate/filter-stereotools

+#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, 0x48b6d241
+0,       1024,       1024,     1024,     4096, 0xe0c4ca9a
+0,       2048,       2048,     1024,     4096, 0x6dd8e26c
+0,       3072,       3072,     1024,     4096, 0x047cce1c
+0,       4096,       4096,     1024,     4096, 0x0b7bc8e4
+0,       5120,       5120,     1024,     4096, 0xf0c9d037
+0,       6144,       6144,     1024,     4096, 0x6f23c83d
+0,       7168,       7168,     1024,     4096, 0xe6d8c099
+0,       8192,       8192,     1024,     4096, 0xcca3cb25
+0,       9216,       9216,     1024,     4096, 0xefced25b
+0,      10240,      10240,     1024,     4096, 0x8614cdcb
+0,      11264,      11264,     1024,     4096, 0x06d1eb3f
+0,      12288,      12288,     1024,     4096, 0x7afbcffd
+0,      13312,      13312,     1024,     4096, 0x6371dcd8
+0,      14336,      14336,     1024,     4096, 0xdd8f90d9
+0,      15360,      15360,     1024,     4096, 0x448c08f4
+0,      16384,      16384,     1024,     4096, 0x4d9b2d26
+0,      17408,      17408,     1024,     4096, 0x735a05da
+0,      18432,      18432,     1024,     4096, 0x8651bf40
+0,      19456,      19456,     1024,     4096, 0xbf98c4e7