Frequency Domain implementation of Dynamics Processing Effect
Ported the frequency domain implementation of the effect from the
development sandbox.
Bug: 64161702
Bug: 38266419
Test: manual with Triton app. Cts tests. Listening tests.
Change-Id: I9417beba2f98f2a677f0857c7976bf76a0e0d8e0
diff --git a/media/libeffects/dynamicsproc/dsp/DPFrequency.h b/media/libeffects/dynamicsproc/dsp/DPFrequency.h
new file mode 100644
index 0000000..9919142
--- /dev/null
+++ b/media/libeffects/dynamicsproc/dsp/DPFrequency.h
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef DPFREQUENCY_H_
+#define DPFREQUENCY_H_
+
+#include <Eigen/Dense>
+#include <unsupported/Eigen/FFT>
+
+#include "RDsp.h"
+#include "SHCircularBuffer.h"
+
+#include "DPBase.h"
+
+
+namespace dp_fx {
+
+using FXBuffer = SHCircularBuffer<float>;
+
+class ChannelBuffer {
+public:
+ FXBuffer cBInput; // Circular Buffer input
+ FXBuffer cBOutput; // Circular Buffer output
+ FloatVec input; // time domain temp vector for input
+ FloatVec output; // time domain temp vector for output
+ FloatVec outTail; // time domain temp vector for output tail (for overlap-add method)
+
+ //Current parameters
+ float inputGainDb;
+ struct BandParams {
+ bool enabled;
+ float freqCutoffHz;
+ size_t binStart;
+ size_t binStop;
+ };
+ struct EqBandParams : public BandParams {
+ float gainDb;
+ };
+ struct MbcBandParams : public BandParams {
+ float gainPreDb;
+ float gainPostDb;
+ float attackTimeMs;
+ float releaseTimeMs;
+ float ratio;
+ float thresholdDb;
+ float kneeWidthDb;
+ float noiseGateThresholdDb;
+ float expanderRatio;
+
+ //Historic values
+ float previousEnvelope;
+ };
+
+ bool mPreEqInUse;
+ bool mPreEqEnabled;
+ std::vector<EqBandParams> mPreEqBands;
+
+ bool mMbcInUse;
+ bool mMbcEnabled;
+ std::vector<MbcBandParams> mMbcBands;
+
+ bool mPostEqInUse;
+ bool mPostEqEnabled;
+ std::vector<EqBandParams> mPostEqBands;
+
+ bool mLimiterInUse;
+ bool mLimiterEnabled;
+ FloatVec mPreEqFactorVector; // temp pre-computed vector to shape spectrum at preEQ stage
+ FloatVec mPostEqFactorVector; // temp pre-computed vector to shape spectrum at postEQ stage
+
+ void initBuffers(unsigned int blockSize, unsigned int overlapSize, unsigned int halfFftSize,
+ unsigned int samplingRate, DPBase &dpBase);
+ void computeBinStartStop(BandParams &bp, size_t binStart);
+private:
+ unsigned int mSamplingRate;
+ unsigned int mBlockSize;
+
+};
+
+class DPFrequency : public DPBase {
+public:
+ virtual size_t processSamples(const float *in, float *out, size_t samples);
+ virtual void reset();
+ void configure(size_t blockSize, size_t overlapSize, size_t samplingRate);
+ static size_t getMinBockSize();
+ static size_t getMaxBockSize();
+
+private:
+ void updateParameters(ChannelBuffer &cb, int channelIndex);
+ size_t processMono(ChannelBuffer &cb);
+ size_t processOneVector(FloatVec &output, FloatVec &input, ChannelBuffer &cb);
+
+ size_t mBlockSize;
+ size_t mHalfFFTSize;
+ size_t mOverlapSize;
+ size_t mSamplingRate;
+
+ std::vector<ChannelBuffer> mChannelBuffers;
+
+ //dsp
+ FloatVec mVWindow; //window class.
+ Eigen::VectorXcf mComplexTemp;
+ Eigen::FFT<float> mFftServer;
+};
+
+} //namespace dp_fx
+
+#endif // DPFREQUENCY_H_