diff options
Diffstat (limited to 'libfaad2/pns.h')
-rw-r--r-- | libfaad2/pns.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/libfaad2/pns.h b/libfaad2/pns.h new file mode 100644 index 0000000000..5a61fa71d2 --- /dev/null +++ b/libfaad2/pns.h @@ -0,0 +1,65 @@ +/* +** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding +** Copyright (C) 2003 M. Bakker, Ahead Software AG, http://www.nero.com +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License as published by +** the Free Software Foundation; either version 2 of the License, or +** (at your option) any later version. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +** +** Any non-GPL usage of this software or parts of this software is strictly +** forbidden. +** +** Commercial non-GPL licensing of this software is possible. +** For more info contact Ahead Software through Mpeg4AAClicense@nero.com. +** +** $Id: pns.h,v 1.11 2003/07/29 08:20:13 menno Exp $ +**/ + +#ifndef __PNS_H__ +#define __PNS_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "common.h" + +#include "syntax.h" + +#define NOISE_OFFSET 90 +/* #define MEAN_NRG 1.537228e+18 */ /* (2^31)^2 / 3 */ +#ifdef FIXED_POINT +#define ISQRT_MEAN_NRG 0x1DC7 /* sqrt(1/sqrt(MEAN_NRG)) */ +#else +#define ISQRT_MEAN_NRG 8.0655e-10 /* 1/sqrt(MEAN_NRG) */ +#endif + + +void pns_decode(ic_stream *ics_left, ic_stream *ics_right, + real_t *spec_left, real_t *spec_right, uint16_t frame_len, + uint8_t channel_pair); + +static INLINE int32_t random2(); +static void gen_rand_vector(real_t *spec, int16_t scale_factor, uint16_t size); + +static INLINE uint8_t is_noise(ic_stream *ics, uint8_t group, uint8_t sfb) +{ + if (ics->sfb_cb[group][sfb] == NOISE_HCB) + return 1; + return 0; +} + +#ifdef __cplusplus +} +#endif +#endif |