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/*
* Copyright (C) 2004-2011 NXP Software
* Copyright (C) 2011 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 GLVAUDIORESAMPLER_H
#define GLVAUDIORESAMPLER_H
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#ifndef int8_t
#define int8_t signed char
#endif
#ifndef int32_t
#define int32_t long int
#endif
#ifndef uint32_t
#define uint32_t unsigned long int
#endif
#ifndef int16_t
#define int16_t signed short
#endif
#ifndef uint16_t
#define uint16_t unsigned short
#endif
#ifndef status_t
#define status_t long int
#endif
static const int kNumPhaseBits = 30;
// phase mask for fraction
static const uint32_t kPhaseMask = (1<<30)-1;
// multiplier to calculate fixed point phase increment
static const uint32_t kPhaseMultiplier = (1 << 30);
static const int kNumInterpBits = 15;
// bits to shift the phase fraction down to avoid overflow
static const int kPreInterpShift = 15; //=kNumPhaseBits - kNumInterpBits;
typedef struct Buffer {
void* raw;
short* i16;
int8_t* i8;
long frameCount;
}Buffer;
typedef enum src_quality {
DEFAULT=0,
LOW_QUALITY=1,
MED_QUALITY=2,
HIGH_QUALITY=3
}src_quality;
typedef struct LVAudioResampler
{
int32_t mBitDepth;
int32_t mChannelCount;
int32_t mSampleRate;
int32_t mInSampleRate;
Buffer mBuffer;
int16_t mVolume[2];
int16_t mTargetVolume[2];
int mFormat;
long mInputIndex;
int32_t mPhaseIncrement;
uint32_t mPhaseFraction;
int mX0L;
int mX0R;
int32_t kPreInterpShift;
int32_t kNumInterpBits;
src_quality mQuality;
}LVAudioResampler;
int32_t LVAudioResamplerCreate(int bitDepth, int inChannelCount,
int32_t sampleRate, int quality);
void LVAudiosetSampleRate(int32_t context,int32_t inSampleRate);
void LVAudiosetVolume(int32_t context, int16_t left, int16_t right) ;
void LVAudioresample_LowQuality(int16_t* out, int16_t* input, long outFrameCount, int32_t context);
void LVResampler_LowQualityInit(int bitDepth, int inChannelCount,
int32_t sampleRate, int32_t context);
void MonoTo2I_16( const short *src,
short *dst,
short n);
void From2iToMono_16( const short *src,
short *dst,
short n);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* GLVAUDIORESAMPLER_H */
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