mirror of https://github.com/mpv-player/mpv
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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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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** $Id: pns.h,v 1.11 2003/07/29 08:20:13 menno Exp $
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**/
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#ifndef __PNS_H__
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#define __PNS_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "common.h"
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#include "syntax.h"
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#define NOISE_OFFSET 90
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/* #define MEAN_NRG 1.537228e+18 */ /* (2^31)^2 / 3 */
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#ifdef FIXED_POINT
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#define ISQRT_MEAN_NRG 0x1DC7 /* sqrt(1/sqrt(MEAN_NRG)) */
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#else
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#define ISQRT_MEAN_NRG 8.0655e-10 /* 1/sqrt(MEAN_NRG) */
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#endif
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void pns_decode(ic_stream *ics_left, ic_stream *ics_right,
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real_t *spec_left, real_t *spec_right, uint16_t frame_len,
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uint8_t channel_pair);
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static INLINE int32_t random2();
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static void gen_rand_vector(real_t *spec, int16_t scale_factor, uint16_t size);
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static INLINE uint8_t is_noise(ic_stream *ics, uint8_t group, uint8_t sfb)
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{
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if (ics->sfb_cb[group][sfb] == NOISE_HCB)
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return 1;
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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