remove filterSse

decoder.go

@@ -236,11 +236,7 @@ func (d *Decoder) frameInit(frame uint32, seekNeeded bool) (err error) {
 		d.flen = d.flenStd
 	}
 	for i := 0; i < d.channels; i++ {
-		if sseEnabled {
-			d.codecs[i].filter = NewSSEFilter(d.data, shift)
-		} else {
-			d.codecs[i].filter = NewCompatibleFilter(d.data, shift)
-		}
+		d.codecs[i].filter = NewCompatibleFilter(d.data, shift)
 		d.codecs[i].adapter.init(10, 10)
 		d.codecs[i].prev = 0
 	}

encoder.go

@@ -231,11 +231,7 @@ func (e *Encoder) frameInit(frame uint32) (err error) {
 	}
 	// init entropy encoder
 	for i := 0; i < e.channels; i++ {
-		if sseEnabled {
-			e.codecs[i].filter = NewSSEFilter(e.data, shift)
-		} else {
-			e.codecs[i].filter = NewCompatibleFilter(e.data, shift)
-		}
+		e.codecs[i].filter = NewCompatibleFilter(e.data, shift)
 		e.codecs[i].adapter.init(10, 10)
 		e.codecs[i].prev = 0
 	}

filter.go

@@ -17,7 +17,7 @@ type filterCompat struct {
 	dl    [24]int32
 }
 
-type filterSse filterCompat
+// type filterSse filterCompat
 
 func NewCompatibleFilter(data [8]byte, shift uint32) Filter {
 	t := filterCompat{}
@@ -136,24 +136,3 @@ func (t *filterCompat) Encode(in *int32) {
 	*in -= (sum >> uint32(t.shift))
 	t.error = *in
 }
-
-func NewSSEFilter(data [8]byte, shift uint32) Filter {
-	t := filterSse{}
-	t.shift = shift
-	t.round = 1 << uint32(shift-1)
-	t.qm[0] = int32(int8(data[0]))
-	t.qm[1] = int32(int8(data[1]))
-	t.qm[2] = int32(int8(data[2]))
-	t.qm[3] = int32(int8(data[3]))
-	t.qm[4] = int32(int8(data[4]))
-	t.qm[5] = int32(int8(data[5]))
-	t.qm[6] = int32(int8(data[6]))
-	t.qm[7] = int32(int8(data[7]))
-	return &t
-}
-
-func (t *filterSse) Decode(in *int32) {
-}
-
-func (t *filterSse) Encode(in *int32) {
-}