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49 lines
3.1 KiB
49 lines
3.1 KiB
/*
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adaptativeCodebookSearch.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 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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