Properly count the last number of samples to mix

1 files changed, 2 insertions, 1 deletions

diff --git a/alc/mixer/mixer_neon.cpp b/alc/mixer/mixer_neon.cpp
index 2cf7e2e8..9d21b1c5 100644
--- a/alc/mixer/mixer_neon.cpp
+++ b/alc/mixer/mixer_neon.cpp
@@ -219,6 +219,7 @@ void Mix_<NEONTag>(const al::span<const float> InSamples, const al::span<FloatBu
     const float delta{(Counter > 0) ? 1.0f / static_cast<float>(Counter) : 0.0f};
     const auto min_len = minz(Counter, InSamples.size());
     const auto aligned_len = minz((min_len+3) & ~size_t{3}, InSamples.size()) - min_len;
+
     for(FloatBufferLine &output : OutBuffer)
     {
         float *RESTRICT dst{al::assume_aligned<16>(output.data()+OutPos)};
@@ -288,7 +289,7 @@ void Mix_<NEONTag>(const al::span<const float> InSamples, const al::span<FloatBu
                 pos += 4;
             } while(--todo);
         }
-        for(size_t leftover{InSamples.size()&3};leftover;++pos,--leftover)
+        for(size_t leftover{(InSamples.size()-pos)&3};leftover;++pos,--leftover)
             dst[pos] += InSamples[pos] * gain;
     }
 }