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-rw-r--r--media/libeffects/testlibs/AudioPeakingFilter.cpp119
1 files changed, 0 insertions, 119 deletions
diff --git a/media/libeffects/testlibs/AudioPeakingFilter.cpp b/media/libeffects/testlibs/AudioPeakingFilter.cpp
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index 99323ac..0000000
--- a/media/libeffects/testlibs/AudioPeakingFilter.cpp
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-/* //device/include/server/AudioFlinger/AudioPeakingFilter.cpp
- **
- ** Copyright 2007, 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.
- */
-
-#include "AudioPeakingFilter.h"
-#include "AudioCommon.h"
-#include "EffectsMath.h"
-
-#include <new>
-#include <assert.h>
-#include <cutils/compiler.h>
-
-namespace android {
-// Format of the coefficient table:
-// kCoefTable[freq][gain][bw][coef]
-// freq - peak frequency, in octaves below Nyquist,from -9 to -1.
-// gain - gain, in millibel, starting at -9600, jumps of 1024, to 4736 millibel.
-// bw - bandwidth, starting at 1 cent, jumps of 1024, to 3073 cents.
-// coef - 0: b0
-// 1: b1
-// 2: b2
-// 3: -a1
-// 4: -a2
-static const size_t kInDims[3] = {9, 15, 4};
-static const audio_coef_t kCoefTable[9*15*4*5] = {
-#include "AudioPeakingFilterCoef.inl"
-};
-
-AudioCoefInterpolator AudioPeakingFilter::mCoefInterp(3, kInDims, 5, (const audio_coef_t*) kCoefTable);
-
-AudioPeakingFilter::AudioPeakingFilter(int nChannels, int sampleRate)
- : mBiquad(nChannels, sampleRate) {
- configure(nChannels, sampleRate);
- reset();
-}
-
-void AudioPeakingFilter::configure(int nChannels, int sampleRate) {
- mNiquistFreq = sampleRate * 500;
- mFrequencyFactor = ((1ull) << 42) / mNiquistFreq;
- mBiquad.configure(nChannels, sampleRate);
- setFrequency(mNominalFrequency);
- commit(true);
-}
-
-void AudioPeakingFilter::reset() {
- setGain(0);
- setFrequency(0);
- setBandwidth(2400);
- commit(true);
-}
-
-void AudioPeakingFilter::setFrequency(uint32_t millihertz) {
- mNominalFrequency = millihertz;
- if (CC_UNLIKELY(millihertz > mNiquistFreq / 2)) {
- millihertz = mNiquistFreq / 2;
- }
- uint32_t normFreq = static_cast<uint32_t>(
- (static_cast<uint64_t>(millihertz) * mFrequencyFactor) >> 10);
- if (CC_LIKELY(normFreq > (1 << 23))) {
- mFrequency = (Effects_log2(normFreq) - ((32-9) << 15)) << (FREQ_PRECISION_BITS - 15);
- } else {
- mFrequency = 0;
- }
-}
-
-void AudioPeakingFilter::setGain(int32_t millibel) {
- mGain = millibel + 9600;
-}
-
-void AudioPeakingFilter::setBandwidth(uint32_t cents) {
- mBandwidth = cents - 1;
-}
-
-void AudioPeakingFilter::commit(bool immediate) {
- audio_coef_t coefs[5];
- int intCoord[3] = {
- mFrequency >> FREQ_PRECISION_BITS,
- mGain >> GAIN_PRECISION_BITS,
- mBandwidth >> BANDWIDTH_PRECISION_BITS
- };
- uint32_t fracCoord[3] = {
- mFrequency << (32 - FREQ_PRECISION_BITS),
- static_cast<uint32_t>(mGain) << (32 - GAIN_PRECISION_BITS),
- mBandwidth << (32 - BANDWIDTH_PRECISION_BITS)
- };
- mCoefInterp.getCoef(intCoord, fracCoord, coefs);
- mBiquad.setCoefs(coefs, immediate);
-}
-
-void AudioPeakingFilter::getBandRange(uint32_t & low, uint32_t & high) const {
- // Half bandwidth, in octaves, 15-bit precision
- int32_t halfBW = (((mBandwidth + 1) / 2) << 15) / 1200;
-
- low = static_cast<uint32_t>((static_cast<uint64_t>(mNominalFrequency) * Effects_exp2(-halfBW + (16 << 15))) >> 16);
- if (CC_UNLIKELY(halfBW >= (16 << 15))) {
- high = mNiquistFreq;
- } else {
- high = static_cast<uint32_t>((static_cast<uint64_t>(mNominalFrequency) * Effects_exp2(halfBW + (16 << 15))) >> 16);
- if (CC_UNLIKELY(high > mNiquistFreq)) {
- high = mNiquistFreq;
- }
- }
-}
-
-}
-