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| author | Mathias Agopian <mathias@google.com> | 2012-11-10 04:44:30 -0800 |
|---|---|---|
| committer | Mathias Agopian <mathias@google.com> | 2012-11-10 04:49:15 -0800 |
| commit | 5d3370d0db4dc97fa413a302e426fb24e87462be (patch) | |
| tree | ddaa49718d4c71bda6a7fe31112a9cfadb949092 /services/audioflinger/AudioResamplerSinc.h | |
| parent | 3c11ff2f409a0abb5b9d8ffd5e13cc42cda67fdc (diff) | |
| download | frameworks_av-5d3370d0db4dc97fa413a302e426fb24e87462be.zip frameworks_av-5d3370d0db4dc97fa413a302e426fb24e87462be.tar.gz frameworks_av-5d3370d0db4dc97fa413a302e426fb24e87462be.tar.bz2 | |
more optimizations...
calculate the offsets from the phase differently, this happens
to reduce the register pressure in the main loop, which in turns
allows the compiler to generate much better code (doesn't need
to spill a lot of stuff on the stack).
this gives another 15% performance increase
Change-Id: I2ce3479dd48b9e6941adb80e6d443d6e14d64d96
Diffstat (limited to 'services/audioflinger/AudioResamplerSinc.h')
| -rw-r--r-- | services/audioflinger/AudioResamplerSinc.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/services/audioflinger/AudioResamplerSinc.h b/services/audioflinger/AudioResamplerSinc.h index 96c31ee..09c6866 100644 --- a/services/audioflinger/AudioResamplerSinc.h +++ b/services/audioflinger/AudioResamplerSinc.h @@ -78,14 +78,11 @@ private: static const int32_t RESAMPLE_FIR_LERP_INT_BITS = 7; struct Constants { - // we have 16 coefs samples per zero-crossing int coefsBits; int cShift; uint32_t cMask; - int pShift; uint32_t pMask; - // number of zero-crossing on each side unsigned int halfNumCoefs; }; |