From 9a51ca0a782764c97c5c393b799ff76b7b6fb75f Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Wed, 3 Jul 2019 22:59:29 -0700
Subject: Pass a span to BFormatDec::process

---
 Alc/bformatdec.cpp | 33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

(limited to 'Alc/bformatdec.cpp')

diff --git a/Alc/bformatdec.cpp b/Alc/bformatdec.cpp
index 9c0c72ec..6ef398ec 100644
--- a/Alc/bformatdec.cpp
+++ b/Alc/bformatdec.cpp
@@ -146,12 +146,9 @@ BFormatDec::BFormatDec(const ALuint inchans, const ALsizei chancount,
 }
 
 
-void BFormatDec::process(FloatBufferLine *OutBuffer, const ALuint OutChannels,
+void BFormatDec::process(const al::span<FloatBufferLine> OutBuffer,
     const FloatBufferLine *InSamples, const ALsizei SamplesToDo)
 {
-    ASSUME(OutChannels > 0);
-    ASSUME(mNumChannels > 0);
-
     if(mDualBand)
     {
         for(ALuint i{0};i < mNumChannels;i++)
@@ -160,24 +157,30 @@ void BFormatDec::process(FloatBufferLine *OutBuffer, const ALuint OutChannels,
 
         const al::span<const FloatBufferLine> hfsamples{mSamplesHF, mNumChannels};
         const al::span<const FloatBufferLine> lfsamples{mSamplesLF, mNumChannels};
-        for(ALuint chan{0};chan < OutChannels;chan++)
+        ALfloat (*mixmtx)[sNumBands][MAX_AMBI_CHANNELS]{mMatrix.Dual};
+        ALuint enabled{mEnabled};
+        for(FloatBufferLine &outbuf : OutBuffer)
         {
-            if(UNLIKELY(!(mEnabled&(1<<chan))))
-                continue;
-
-            MixRowSamples(OutBuffer[chan], mMatrix.Dual[chan][sHFBand], hfsamples, 0, SamplesToDo);
-            MixRowSamples(OutBuffer[chan], mMatrix.Dual[chan][sLFBand], lfsamples, 0, SamplesToDo);
+            if(LIKELY(enabled&1))
+            {
+                MixRowSamples(outbuf, (*mixmtx)[sHFBand], hfsamples, 0, SamplesToDo);
+                MixRowSamples(outbuf, (*mixmtx)[sLFBand], lfsamples, 0, SamplesToDo);
+            }
+            ++mixmtx;
+            enabled >>= 1;
         }
     }
     else
     {
         const al::span<const FloatBufferLine> insamples{InSamples, mNumChannels};
-        for(ALuint chan{0};chan < OutChannels;chan++)
+        ALfloat (*mixmtx)[MAX_AMBI_CHANNELS]{mMatrix.Single};
+        ALuint enabled{mEnabled};
+        for(FloatBufferLine &outbuf : OutBuffer)
         {
-            if(UNLIKELY(!(mEnabled&(1<<chan))))
-                continue;
-
-            MixRowSamples(OutBuffer[chan], mMatrix.Single[chan], insamples, 0, SamplesToDo);
+            if(LIKELY(enabled&1))
+                MixRowSamples(outbuf, *mixmtx, insamples, 0, SamplesToDo);
+            ++mixmtx;
+            enabled >>= 1;
         }
     }
 }
-- 
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