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/**
* Copyright (C) 2022 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.
*/
/*------------------------------------------------------------------------------
*
* All declarations relevant for aptxEncode. This function allows clients
* to invoke bt-aptX encoding on 4 new PCM samples,
* generating 4 new quantised codes. A separate function allows the
* packing of the 4 codes into a 16-bit word.
*
*----------------------------------------------------------------------------*/
#ifndef APTXENCODER_H
#define APTXENCODER_H
#ifdef _GCC
#pragma GCC visibility push(hidden)
#endif
#include "AptxParameters.h"
#include "DitherGenerator.h"
#include "Qmf.h"
#include "Quantiser.h"
#include "SubbandFunctionsCommon.h"
/* Function to carry out a single-channel aptX encode on 4 new PCM samples */
XBT_INLINE_ void aptxEncode(const int32_t pcm[4], Qmf_storage* Qmf_St,
Encoder_data* EncoderDataPt) {
int32_t predVals[4];
int32_t qCodes[4];
int32_t aqmfOutputs[4];
/* Extract the previous predicted values and quantised codes into arrays */
for (int i = 0; i < 4; i++) {
predVals[i] = EncoderDataPt->m_SubbandData[i].m_predData.m_predVal;
qCodes[i] = EncoderDataPt->m_qdata[i].qCode;
}
/* Update codeword history, then generate new dither values. */
EncoderDataPt->m_codewordHistory =
xbtEncupdateCodewordHistory(qCodes, EncoderDataPt->m_codewordHistory);
EncoderDataPt->m_dithSyncRandBit = xbtEncgenerateDither(
EncoderDataPt->m_codewordHistory, EncoderDataPt->m_ditherOutputs);
/* Run the analysis QMF */
QmfAnalysisFilter(pcm, Qmf_St, predVals, aqmfOutputs);
/* Run the quantiser for each subband */
quantiseDifferenceLL(aqmfOutputs[0], EncoderDataPt->m_ditherOutputs[0],
EncoderDataPt->m_SubbandData[0].m_iqdata.delta,
&EncoderDataPt->m_qdata[0]);
quantiseDifferenceLH(aqmfOutputs[1], EncoderDataPt->m_ditherOutputs[1],
EncoderDataPt->m_SubbandData[1].m_iqdata.delta,
&EncoderDataPt->m_qdata[1]);
quantiseDifferenceHL(aqmfOutputs[2], EncoderDataPt->m_ditherOutputs[2],
EncoderDataPt->m_SubbandData[2].m_iqdata.delta,
&EncoderDataPt->m_qdata[2]);
quantiseDifferenceHH(aqmfOutputs[3], EncoderDataPt->m_ditherOutputs[3],
EncoderDataPt->m_SubbandData[3].m_iqdata.delta,
&EncoderDataPt->m_qdata[3]);
}
XBT_INLINE_ void aptxPostEncode(Encoder_data* EncoderDataPt) {
/* Run the remaining subband processing for each subband */
/* Manual inlining on the 4 subband */
processSubbandLL(EncoderDataPt->m_qdata[0].qCode,
EncoderDataPt->m_ditherOutputs[0],
&EncoderDataPt->m_SubbandData[0],
&EncoderDataPt->m_SubbandData[0].m_iqdata);
processSubband(EncoderDataPt->m_qdata[1].qCode,
EncoderDataPt->m_ditherOutputs[1],
&EncoderDataPt->m_SubbandData[1],
&EncoderDataPt->m_SubbandData[1].m_iqdata);
processSubbandHL(EncoderDataPt->m_qdata[2].qCode,
EncoderDataPt->m_ditherOutputs[2],
&EncoderDataPt->m_SubbandData[2],
&EncoderDataPt->m_SubbandData[2].m_iqdata);
processSubband(EncoderDataPt->m_qdata[3].qCode,
EncoderDataPt->m_ditherOutputs[3],
&EncoderDataPt->m_SubbandData[3],
&EncoderDataPt->m_SubbandData[3].m_iqdata);
}
#ifdef _GCC
#pragma GCC visibility pop
#endif
#endif // APTXENCODER_H
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