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-rw-r--r--services/audioflinger/AudioResamplerSinc.h39
1 files changed, 20 insertions, 19 deletions
diff --git a/services/audioflinger/AudioResamplerSinc.h b/services/audioflinger/AudioResamplerSinc.h
index c53c66d..25fc025 100644
--- a/services/audioflinger/AudioResamplerSinc.h
+++ b/services/audioflinger/AudioResamplerSinc.h
@@ -27,14 +27,15 @@ namespace android {
typedef const int32_t * (*readCoefficientsFn)(bool upDownSample);
-typedef int32_t (*readResampleFirNumCoeffFn)();
-typedef int32_t (*readResampleFirLerpIntBitsFn)();
+typedef int32_t (*readResampleFirNumCoeffFn)();
+typedef int32_t (*readResampleFirLerpIntBitsFn)();
// ----------------------------------------------------------------------------
class AudioResamplerSinc : public AudioResampler {
public:
- AudioResamplerSinc(int bitDepth, int inChannelCount, int32_t sampleRate, int32_t quality = HIGH_QUALITY);
+ AudioResamplerSinc(int bitDepth, int inChannelCount, int32_t sampleRate,
+ src_quality quality = HIGH_QUALITY);
virtual ~AudioResamplerSinc();
@@ -60,10 +61,6 @@ private:
inline void read(int16_t*& impulse, uint32_t& phaseFraction,
const int16_t* in, size_t inputIndex);
- readCoefficientsFn mReadResampleCoefficients ;
- readResampleFirNumCoeffFn mReadResampleFirNumCoeff;
- readResampleFirLerpIntBitsFn mReadResampleFirLerpIntBits;
-
int16_t *mState;
int16_t *mImpulse;
int16_t *mRingFull;
@@ -72,24 +69,28 @@ private:
static const int32_t mFirCoefsDown[];
static const int32_t mFirCoefsUp[];
- void * mResampleCoeffLib;
// ----------------------------------------------------------------------------
static const int32_t RESAMPLE_FIR_NUM_COEF = 8;
static const int32_t RESAMPLE_FIR_LERP_INT_BITS = 4;
- // we have 16 coefs samples per zero-crossing
- static int coefsBits;
- static int cShift;
- static uint32_t cMask;
+ 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;
+ };
- // and we use 15 bits to interpolate between these samples
- // this cannot change because the mul below rely on it.
- static const int pLerpBits = 15;
- static int pShift;
- static uint32_t pMask;
+ static Constants highQualityConstants;
+ static Constants veryHighQualityConstants;
+ const Constants *mConstants; // points to appropriate set of coefficient parameters
- // number of zero-crossing on each side
- static unsigned int halfNumCoefs;
+ static void init_routine();
};
// ----------------------------------------------------------------------------