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38 lines
2.0 KiB
38 lines
2.0 KiB
/*
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* Copyright (c) 2011-2019 Belledonne Communications SARL.
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*
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* This file is part of bcg729.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef POSTFILTER_H
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#define POSTFILTER_H
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/* init function */
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void initPostFilter(bcg729DecoderChannelContextStruct *decoderChannelContext);
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/*****************************************************************************/
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/* postFilter: filter the reconstructed speech according to spec A.4.2 */
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/* parameters: */
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/* -(i/o) decoderChannelContext : the channel context data */
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/* -(i) LPCoefficients: 10 LP coeff for current subframe in Q12 */
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/* -(i) reconstructedSpeech: output of LP Synthesis, 50 values in Q0 */
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/* 10 values of previous subframe, accessed in range [-10, 39] */
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/* -(i) intPitchDelay: the integer part of Pitch Delay in Q0 */
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/* -(i) subframeIndex: 0 or L_SUBFRAME for subframe 0 or 1 */
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/* -(o) postFilteredSignal: 40 values in Q0 */
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/* */
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/*****************************************************************************/
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void postFilter(bcg729DecoderChannelContextStruct *decoderChannelContext, word16_t *LPCoefficients, word16_t *reconstructedSpeech, int16_t intPitchDelay, int subframeIndex,
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word16_t *postFilteredSignal);
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#endif /* ifndef POSTFILTER_H */
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