Simplify the BFormatDec upsampler

Since the only difference applied is a scalar on the high-frequency response, a
B-Format-to-B-Format transcode can be accomplished with a high-shelf filter. A
similar thing can be done with AmbiUpsampler, but only when outputing to
periphonic B-Format.

1 files changed, 2 insertions, 2 deletions

diff --git a/Alc/bformatdec.h b/Alc/bformatdec.h
index 7b5d1cd2..9c7ce7a7 100644
--- a/Alc/bformatdec.h
+++ b/Alc/bformatdec.h
@@ -2,6 +2,7 @@
 #define BFORMATDEC_H
 
 #include "alMain.h"
+#include "filters/biquad.h"
 #include "filters/splitter.h"
 #include "almalloc.h"
 
@@ -30,8 +31,7 @@ private:
     std::array<ALfloat,BUFFERSIZE> *mSamplesLF;
 
     struct {
-        BandSplitter XOver;
-        ALfloat Gains[sNumBands];
+        BiquadFilter Shelf;
     } mUpSampler[4];
 
     ALsizei mNumChannels;