2003-08-31 00:30:28 +02:00
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/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003 M. Bakker, Ahead Software AG, http://www.nero.com
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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 2 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, 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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** Any non-GPL usage of this software or parts of this software is strictly
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** forbidden.
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**
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** Commercial non-GPL licensing of this software is possible.
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** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
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**
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2003-10-04 00:23:26 +02:00
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** $Id: tns.h,v 1.9 2003/09/09 18:09:52 menno Exp $
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2003-08-31 00:30:28 +02:00
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**/
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#ifndef __TNS_H__
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#define __TNS_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define TNS_MAX_ORDER 20
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void tns_decode_frame(ic_stream *ics, tns_info *tns, uint8_t sr_index,
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uint8_t object_type, real_t *spec, uint16_t frame_len);
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void tns_encode_frame(ic_stream *ics, tns_info *tns, uint8_t sr_index,
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uint8_t object_type, real_t *spec, uint16_t frame_len);
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static void tns_decode_coef(uint8_t order, uint8_t coef_res_bits, uint8_t coef_compress,
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uint8_t *coef, real_t *a);
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static void tns_ar_filter(real_t *spectrum, uint16_t size, int8_t inc, real_t *lpc,
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uint8_t order);
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static void tns_ma_filter(real_t *spectrum, uint16_t size, int8_t inc, real_t *lpc,
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uint8_t order);
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#ifdef __cplusplus
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}
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#endif
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#endif
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