avcodec/nellymoserenc: fix sign error

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/nellymoserenc.c

@@ -175,7 +175,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
     /* Generate overlap window */
     ff_init_ff_sine_windows(7);
     for (i = 0; i < POW_TABLE_SIZE; i++)
-        pow_table[i] = -pow(2, -i / 2048.0 - 3.0 + POW_TABLE_OFFSET);
+        pow_table[i] = pow(2, -i / 2048.0 - 3.0 + POW_TABLE_OFFSET);
 
     if (s->avctx->trellis) {
         s->opt  = av_malloc(NELLY_BANDS * OPT_SIZE * sizeof(float  ));

tests/fate/audio.mak

@@ -44,8 +44,8 @@ fate-nellymoser-aref-encode: $(AREF) ./tests/data/asynth-16000-1.wav
 fate-nellymoser-aref-encode: CMD = enc_dec_pcm flv wav s16le $(REF) -c:a nellymoser
 fate-nellymoser-aref-encode: CMP = stddev
 fate-nellymoser-aref-encode: REF = ./tests/data/asynth-16000-1.wav
-fate-nellymoser-aref-encode: CMP_SHIFT = -244
-fate-nellymoser-aref-encode: CMP_TARGET = 9612
+fate-nellymoser-aref-encode: CMP_SHIFT = -256
+fate-nellymoser-aref-encode: CMP_TARGET = 3863
 fate-nellymoser-aref-encode: SIZE_TOLERANCE = 268
 
 FATE_SAMPLES_AUDIO-$(call DEMDEC, AVI, ON2AVC) += fate-on2avc