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47 lines
3.0 KiB
47 lines
3.0 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 ADAPTATIVECODEBOOKSEARCH_H
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#define ADAPTATIVECODEBOOKSEARCH_H
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/*****************************************************************************/
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/* adaptativeCodebookSearch: compute parameter P1 and P2 as in spec A.3.7 */
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/* compute also adaptative codebook vector as in spec 3.7.1 */
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/* parameters: */
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/* -(i/o) excitationVector: [-154,0[ previous excitation as input */
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/* Range [0,39[ */
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/* 40 words of LPResidualSignal as substitute for current */
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/* excitation (spec A.3.7) as input */
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/* 40 words of adaptative codebook vector in Q0 as output */
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/* Buffer in Q0 accessed in range [-154, 39] */
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/* -(i/o) intPitchDelayMin: low boundary for pitch delay search */
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/* -(i/o) intPitchDelayMax: low boundary for pitch delay search */
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/* Boundaries are updated during first subframe search */
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/* -(i) impulseResponse: 40 values as in spec A.3.5 in Q12 */
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/* -(i) targetSignal: 40 values as in spec A.3.6 in Q0 */
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/* */
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/* -(o) intPitchDelay: the integer pitch delay */
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/* -(o) fracPitchDelay: the fractionnal part of pitch delay */
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/* -(o) pitchDelayCodeword: P1 or P2 codeword as in spec 3.7.2 */
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/* -(o) adaptativeCodebookVector: 40 words of adaptative codebook vector*/
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/* as described in spec 3.7.1, in Q0. */
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/* -(i) subFrameIndex: 0 for the first subframe, 40 for the second */
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/* */
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/*****************************************************************************/
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void adaptativeCodebookSearch(word16_t excitationVector[], int16_t *intPitchDelayMin, int16_t *intPitchDelayMax, word16_t impulseResponse[], word16_t targetSignal[],
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int16_t *intPitchDelay, int16_t *fracPitchDelay, uint16_t *pitchDelayCodeword, uint16_t subFrameIndex);
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#endif /* ifndef ADAPTATIVECODEBOOKSEARCH_H */
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