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48 lines
1.5 KiB
48 lines
1.5 KiB
/** |
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* LPC utility code |
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* Copyright (c) 2006 Justin Ruggles <justin.ruggles@gmail.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef FFMPEG_LPC_H |
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#define FFMPEG_LPC_H |
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#include <stdint.h> |
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#include "dsputil.h" |
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#define ORDER_METHOD_EST 0 |
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#define ORDER_METHOD_2LEVEL 1 |
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#define ORDER_METHOD_4LEVEL 2 |
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#define ORDER_METHOD_8LEVEL 3 |
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#define ORDER_METHOD_SEARCH 4 |
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#define ORDER_METHOD_LOG 5 |
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#define MIN_LPC_ORDER 1 |
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#define MAX_LPC_ORDER 32 |
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/** |
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* Calculate LPC coefficients for multiple orders |
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*/ |
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int ff_lpc_calc_coefs(DSPContext *s, |
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const int32_t *samples, int blocksize, int min_order, |
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int max_order, int precision, |
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int32_t coefs[][MAX_LPC_ORDER], int *shift, int use_lpc, |
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int omethod, int max_shift, int zero_shift); |
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#endif /* FFMPEG_LPC_H */
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