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/*
* AAC decoder
* Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
* Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com )
* Copyright (c) 2008-2013 Alex Converse <alex.converse@gmail.com>
*
* AAC LATM decoder
* Copyright (c) 2008-2010 Paul Kendall <paul@kcbbs.gen.nz>
* Copyright (c) 2010 Janne Grunau <janne-libav@jannau.net>
*
* AAC decoder fixed-point implementation
* Copyright (c) 2013
* MIPS Technologies, Inc., California.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define USE_FIXED 1
#include "libavutil/thread.h"
#include "libavcodec/aac_defines.h"
#include "libavcodec/avcodec.h"
#include "aacdec.h"
#include "libavcodec/aactab.h"
#include "libavcodec/sinewin_fixed_tablegen.h"
#include "libavcodec/kbdwin.h"
#include "libavcodec/cbrt_data.h"
#include "libavcodec/aacsbr.h"
DECLARE_ALIGNED(32, static int, aac_kbd_long_1024_fixed)[1024];
DECLARE_ALIGNED(32, static int, aac_kbd_short_128_fixed)[128];
DECLARE_ALIGNED(32, static int, aac_kbd_long_960_fixed)[960];
DECLARE_ALIGNED(32, static int, aac_kbd_short_120_fixed)[120];
static void init_tables_fixed_fn(void)
{
ff_cbrt_tableinit_fixed();
ff_kbd_window_init_fixed(aac_kbd_long_1024_fixed, 4.0, 1024);
ff_kbd_window_init_fixed(aac_kbd_short_128_fixed, 6.0, 128);
ff_kbd_window_init_fixed(aac_kbd_long_960_fixed, 4.0, 960);
ff_kbd_window_init_fixed(aac_kbd_short_120_fixed, 6.0, 120);
ff_aac_sbr_init_fixed();
init_sine_windows_fixed();
}
static const int cce_scale_fixed[8] = {
Q30(1.0), //2^(0/8)
Q30(1.0905077327), //2^(1/8)
Q30(1.1892071150), //2^(2/8)
Q30(1.2968395547), //2^(3/8)
Q30(1.4142135624), //2^(4/8)
Q30(1.5422108254), //2^(5/8)
Q30(1.6817928305), //2^(6/8)
Q30(1.8340080864), //2^(7/8)
};
/** Dequantization-related */
#include "aacdec_fixed_dequant.h"
#include "aacdec_fixed_coupling.h"
#include "aacdec_fixed_prediction.h"
#include "aacdec_dsp_template.c"
#include "aacdec_proc_template.c"
av_cold int ff_aac_decode_init_fixed(AVCodecContext *avctx)
{
static AVOnce init_fixed_once = AV_ONCE_INIT;
AACDecContext *ac = avctx->priv_data;
ac->is_fixed = 1;
avctx->sample_fmt = AV_SAMPLE_FMT_S32P;
aac_dsp_init_fixed(&ac->dsp);
aac_proc_init_fixed(&ac->proc);
ac->fdsp = avpriv_alloc_fixed_dsp(avctx->flags & AV_CODEC_FLAG_BITEXACT);
if (!ac->fdsp)
return AVERROR(ENOMEM);
ff_thread_once(&init_fixed_once, init_tables_fixed_fn);
return ff_aac_decode_init(avctx);
}
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