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Mathias Agopian65ab4712010-07-14 17:59:35 -07001/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_AUDIO_RESAMPLER_SINC_H
18#define ANDROID_AUDIO_RESAMPLER_SINC_H
19
20#include <stdint.h>
21#include <sys/types.h>
Mark Salyzyn60d02072016-09-29 08:48:48 -070022#include <android/log.h>
Mathias Agopian65ab4712010-07-14 17:59:35 -070023
Andy Hung068561c2017-01-03 17:09:32 -080024#include <media/AudioResampler.h>
Mathias Agopian65ab4712010-07-14 17:59:35 -070025
26namespace android {
27
SathishKumar Mani76b11162012-01-17 10:49:47 -080028
29typedef const int32_t * (*readCoefficientsFn)(bool upDownSample);
Glenn Kastenac602052012-10-01 14:04:31 -070030typedef int32_t (*readResampleFirNumCoeffFn)();
31typedef int32_t (*readResampleFirLerpIntBitsFn)();
SathishKumar Mani76b11162012-01-17 10:49:47 -080032
Mathias Agopian65ab4712010-07-14 17:59:35 -070033// ----------------------------------------------------------------------------
34
35class AudioResamplerSinc : public AudioResampler {
36public:
Andy Hung3348e362014-07-07 10:21:44 -070037 AudioResamplerSinc(int inChannelCount, int32_t sampleRate,
Glenn Kastenac602052012-10-01 14:04:31 -070038 src_quality quality = HIGH_QUALITY);
Mathias Agopian65ab4712010-07-14 17:59:35 -070039
Glenn Kastenc19e2242012-01-30 14:54:39 -080040 virtual ~AudioResamplerSinc();
Mathias Agopian65ab4712010-07-14 17:59:35 -070041
Andy Hung6b3b7e32015-03-29 00:49:22 -070042 virtual size_t resample(int32_t* out, size_t outFrameCount,
Mathias Agopian65ab4712010-07-14 17:59:35 -070043 AudioBufferProvider* provider);
44private:
45 void init();
46
Andy Hung5e58b0a2014-06-23 19:07:29 -070047 virtual void setVolume(float left, float right);
Mathias Agopian0d585c82012-11-10 03:26:39 -080048
Mathias Agopian65ab4712010-07-14 17:59:35 -070049 template<int CHANNELS>
Andy Hung6b3b7e32015-03-29 00:49:22 -070050 size_t resample(int32_t* out, size_t outFrameCount,
Mathias Agopian65ab4712010-07-14 17:59:35 -070051 AudioBufferProvider* provider);
52
53 template<int CHANNELS>
54 inline void filterCoefficient(
Mathias Agopian0d585c82012-11-10 03:26:39 -080055 int32_t* out, uint32_t phase, const int16_t *samples, uint32_t vRL);
Mathias Agopian65ab4712010-07-14 17:59:35 -070056
57 template<int CHANNELS>
58 inline void interpolate(
59 int32_t& l, int32_t& r,
Mathias Agopian46afbec2012-11-04 02:03:49 -080060 const int32_t* coefs, size_t offset,
61 int32_t lerp, const int16_t* samples);
Mathias Agopian65ab4712010-07-14 17:59:35 -070062
63 template<int CHANNELS>
64 inline void read(int16_t*& impulse, uint32_t& phaseFraction,
Glenn Kasten54c3b662012-01-06 07:46:30 -080065 const int16_t* in, size_t inputIndex);
Mathias Agopian65ab4712010-07-14 17:59:35 -070066
67 int16_t *mState;
68 int16_t *mImpulse;
69 int16_t *mRingFull;
Mathias Agopian0d585c82012-11-10 03:26:39 -080070 int32_t mVolumeSIMD[2];
Mathias Agopian65ab4712010-07-14 17:59:35 -070071
Glenn Kasten54c3b662012-01-06 07:46:30 -080072 const int32_t * mFirCoefs;
Glenn Kastenc4974312012-12-14 07:13:28 -080073 static const uint32_t mFirCoefsDown[];
74 static const uint32_t mFirCoefsUp[];
Mathias Agopian65ab4712010-07-14 17:59:35 -070075
76 // ----------------------------------------------------------------------------
77 static const int32_t RESAMPLE_FIR_NUM_COEF = 8;
Mathias Agopian443e6962012-10-26 13:48:42 -070078 static const int32_t RESAMPLE_FIR_LERP_INT_BITS = 7;
Mathias Agopian65ab4712010-07-14 17:59:35 -070079
Glenn Kastenac602052012-10-01 14:04:31 -070080 struct Constants {
Glenn Kastenac602052012-10-01 14:04:31 -070081 int coefsBits;
82 int cShift;
83 uint32_t cMask;
Glenn Kastenac602052012-10-01 14:04:31 -070084 int pShift;
85 uint32_t pMask;
Glenn Kastenac602052012-10-01 14:04:31 -070086 // number of zero-crossing on each side
87 unsigned int halfNumCoefs;
88 };
89
90 static Constants highQualityConstants;
91 static Constants veryHighQualityConstants;
92 const Constants *mConstants; // points to appropriate set of coefficient parameters
93
94 static void init_routine();
Mathias Agopian65ab4712010-07-14 17:59:35 -070095};
96
97// ----------------------------------------------------------------------------
Glenn Kasten63238ef2015-03-02 15:50:29 -080098} // namespace android
Mathias Agopian65ab4712010-07-14 17:59:35 -070099
100#endif /*ANDROID_AUDIO_RESAMPLER_SINC_H*/