Freeware Advanced Audio (AAC) Decoder including SBR decoding
http://www.audiocoding.com/
FAAD2 is a HE, LC, MAIN and LTP profile, MPEG2 and MPEG-4 AAC decoder.
FAAD2 includes code for SBR (HE AAC) decoding.
FAAD2 is licensed under the GPL.
__________
COPYRIGHTS
For FAAD2 the following license applies:
******************************************************************************
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003 M. Bakker (mbakker(at)nero.com), Ahead Software AG
**
** 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.
**
** Commercial non-GPL licensing of this software is also possible.
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
******************************************************************************
Please note that the use of this software may require the payment of
patent royalties. You need to consider this issue before you start
building derivative works. We are not warranting or indemnifying you in
any way for patent royalities! YOU ARE SOLELY RESPONSIBLE FOR YOUR OWN
ACTIONS!
______
PEOPLE
FAAD2 is written by:
- M. Bakker (mbakker(at)nero.com).
_______________
VERSION HISTORY
Sorry, try building a ChangeLog from CVS.
__________________________________
REDISTRIBUTED OPEN SOURCE PACKAGES
This is the list of redistributed open source packages that are included
in FAAD2:
Name: mp4v2
Version: 0.9.8.6
Origin: http://www.mpeg4ip.net
Author: David Mackie
Directory: common/mp4v2
License: MPL, Mozilla Public License, version 1.1
Name: mp4av
Version: 0.9.8.6
Origin: http://www.mpeg4ip.net
Author: David Mackie
Directory: common/mp4av
License: MPL, Mozilla Public License, version 1.1
___________________
DIRECTORY STRUCTURE
faad2 - top level directory.
aacDECdrop - windows decoder/player with drag'n'drop functionality
common - generally used libraries and code.
faad - general common functions like filereading and streaming
as well as getting info from aac files.
mp4v2 - MPEG-4 file reading library.
mp4av - MPEG-4 file general function library.
mp4ff - Small MP4 file format library (includes tagging abilities).
CoreAAC - AAC DirectShow filter.
frontend - command line frontend to the FAAD2 library, also supports
MPEG-4 file decoding.
include - inlude file for the FAAD2 library.
libfaad - the FAAD2 AAC decoder library including SBR.
codebook - Huffman codebooks
plugins - plugins for all kinds of pograms.
in_mp4 - winamp MPEG-4 AAC file input plugin.
QCD - Quintessential player AAC plugin.
QCDMp4 - Quintessential player MP4 plugin.
winamp - winamp2 AAC input plugin.
winamp3 - winamp3 AAC input plugin.
xmms - xmms AAC plugin
mpeg4ip - plugin for the mpeg4ip player
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/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003-2004 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.
**
** $Id$
**/
#ifndef __FIXED_H__
#define __FIXED_H__
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_WIN32_WCE) && defined(_ARM_)
#include <cmnintrin.h>
#endif
#define COEF_BITS 28
#define COEF_PRECISION (1 << COEF_BITS)
#define REAL_BITS 14 // MAXIMUM OF 14 FOR FIXED POINT SBR
#define REAL_PRECISION (1 << REAL_BITS)
/* FRAC is the fractional only part of the fixed point number [0.0..1.0) */
#define FRAC_SIZE 32 /* frac is a 32 bit integer */
#define FRAC_BITS 31
#define FRAC_PRECISION ((uint32_t)(1 << FRAC_BITS))
#define FRAC_MAX 0x7FFFFFFF
typedef int32_t real_t;
#define REAL_CONST(A) (((A) >= 0) ? ((real_t)((A)*(REAL_PRECISION)+0.5)) : ((real_t)((A)*(REAL_PRECISION)-0.5)))
#define COEF_CONST(A) (((A) >= 0) ? ((real_t)((A)*(COEF_PRECISION)+0.5)) : ((real_t)((A)*(COEF_PRECISION)-0.5)))
#define FRAC_CONST(A) (((A) == 1.00) ? ((real_t)FRAC_MAX) : (((A) >= 0) ? ((real_t)((A)*(FRAC_PRECISION)+0.5)) : ((real_t)((A)*(FRAC_PRECISION)-0.5))))
//#define FRAC_CONST(A) (((A) >= 0) ? ((real_t)((A)*(FRAC_PRECISION)+0.5)) : ((real_t)((A)*(FRAC_PRECISION)-0.5)))
#define Q2_BITS 22
#define Q2_PRECISION (1 << Q2_BITS)
#define Q2_CONST(A) (((A) >= 0) ? ((real_t)((A)*(Q2_PRECISION)+0.5)) : ((real_t)((A)*(Q2_PRECISION)-0.5)))
#if defined(CPU_COLDFIRE)
static INLINE real_t MUL_F(real_t A, real_t B)
{
asm volatile (
"mac.l %[A], %[B], %%acc0\n\t"
"movclr.l %%acc0, %[A]"
: [A] "+&r" (A) : [B] "r" (B)
);
return A;
}
static INLINE real_t MUL_C(real_t A, real_t B)
{
asm volatile (
"mac.l %[A], %[B], %%acc0\n\t"
"movclr.l %%acc0, %[A]\n\t"
: [A] "+&d" (A) : [B] "r" (B)
);
return A << 3;
}
/* MUL_R needs too many shifts for us to just operate on the top 32 bits the
emac unit gives as usual, so we do a full 64 bit mul here. */
static INLINE real_t MUL_R(real_t x, real_t y)
{
real_t t1, t2;
asm volatile (
"mac.l %[x],%[y],%%acc0\n" /* multiply */
"mulu.l %[y],%[x] \n" /* get lower half, avoid emac stall */
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