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40 lines
2.1 KiB
40 lines
2.1 KiB
/*
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postFilter.h
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Copyright (C) 2011 Belledonne Communications, Grenoble, France
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Author : Johan Pascal
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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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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