5fe37c6838
First effect factory and effect library API implementation. Also added default effect libraries for reverb and equalizer effects. These libraries are for functional test only and are not fine tuned with regard to audio quality. They will probably be replaced by other implementations before the release. Change-Id: I6868f8612146ae282c64052765c61a52ec789ec8
85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/* //device/servers/AudioFlinger/AudioCoefInterpolator.cpp
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**
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** Copyright 2008, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include <string.h>
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#include "AudioCoefInterpolator.h"
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#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
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#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
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namespace android {
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AudioCoefInterpolator::AudioCoefInterpolator(size_t nInDims,
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const size_t inDims[],
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size_t nOutDims,
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const audio_coef_t * table) {
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mNumInDims = nInDims;
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memcpy(mInDims, inDims, nInDims * sizeof(size_t));
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mNumOutDims = nOutDims;
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mTable = table;
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// Initialize offsets array
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size_t dim = nInDims - 1;
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mInDimOffsets[nInDims - 1] = nOutDims;
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while (dim-- > 0) {
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mInDimOffsets[dim] = mInDimOffsets[dim + 1] * mInDims[dim + 1];
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}
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}
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void AudioCoefInterpolator::getCoef(const int intCoord[], uint32_t fracCoord[],
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audio_coef_t out[]) {
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size_t index = 0;
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size_t dim = mNumInDims;
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while (dim-- > 0) {
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if (UNLIKELY(intCoord[dim] < 0)) {
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fracCoord[dim] = 0;
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} else if (UNLIKELY(intCoord[dim] >= mInDims[dim] - 1)) {
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fracCoord[dim] = 0;
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index += mInDimOffsets[dim] * (mInDims[dim] - 1);
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} else {
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index += mInDimOffsets[dim] * intCoord[dim];
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}
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}
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getCoefRecurse(index, fracCoord, out, 0);
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}
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void AudioCoefInterpolator::getCoefRecurse(size_t index,
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const uint32_t fracCoord[],
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audio_coef_t out[], size_t dim) {
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if (dim == mNumInDims) {
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memcpy(out, mTable + index, mNumOutDims * sizeof(audio_coef_t));
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} else {
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getCoefRecurse(index, fracCoord, out, dim + 1);
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if (LIKELY(fracCoord != 0)) {
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audio_coef_t tempCoef[MAX_OUT_DIMS];
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getCoefRecurse(index + mInDimOffsets[dim], fracCoord, tempCoef,
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dim + 1);
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size_t d = mNumOutDims;
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while (d-- > 0) {
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out[d] = interp(out[d], tempCoef[d], fracCoord[dim]);
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}
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}
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}
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}
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audio_coef_t AudioCoefInterpolator::interp(audio_coef_t lo, audio_coef_t hi,
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uint32_t frac) {
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int64_t delta = static_cast<int64_t>(hi-lo) * frac;
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return lo + static_cast<audio_coef_t> (delta >> 32);
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}
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}
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