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Merge pull request #5906 from kencooke/audio-src

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Algorithmic optimization of new resampler
This commit is contained in:
Brad Hefta-Gaub 2015-09-28 20:44:27 -07:00
commit 8da52e2f17
3 changed files with 746 additions and 4169 deletions
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1
CMakeLists.txt
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@ -186,7 +186,6 @@ setup_externals_binary_dir()
option(GET_BULLET "Get Bullet library automatically as external project" 1)
option(GET_GLM "Get GLM library automatically as external project" 1)
option(GET_GVERB "Get Gverb library automatically as external project" 1)
option(GET_SOXR "Get Soxr library automatically as external project" 1)
option(GET_TBB "Get Threading Building Blocks library automatically as external project" 1)
option(GET_LIBOVR "Get LibOVR library automatically as external project" 1)
option(GET_VHACD "Get V-HACD library automatically as external project" 1)

4907
libraries/audio/src/AudioSRC.cpp
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7
libraries/audio/src/AudioSRC.h
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@ -31,6 +31,8 @@ public:
private:
float* _polyphaseFilter;
int* _stepTable;
float* _history[MAX_CHANNELS];
float* _inputs[MAX_CHANNELS];
float* _outputs[MAX_CHANNELS];
@ -45,10 +47,13 @@ private:
int _numTaps;
int _numHistory;
int _phase;
int64_t _offset;
int64_t _step;
int createPolyphaseFilter(int upFactor, int downFactor, float gain);
int createRationalFilter(int upFactor, int downFactor, float gain);
int createIrrationalFilter(int upFactor, int downFactor, float gain);
int multirateFilter1(const float* input0, float* output0, int inputFrames);
int multirateFilter2(const float* input0, const float* input1, float* output0, float* output1, int inputFrames);