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/*
* TwoLAME: an optimized MPEG Audio Layer Two encoder
*
* Copyright (C) 2001-2004 Michael Cheng
* Copyright (C) 2004-2006 The TwoLAME Project
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
*
*/
#include <stdio.h>
#include "twolame.h"
#include "common.h"
#include "psycho_n1.h"
/* this is the null psychoacoustic model
All it does it copy some predefined values.
No actual modelling takes place */
/* a bunch of SNR values I sort of made up MFC 1 oct 99
Found by averaging the SNR values over a sound file
FIXME: Do a more rigourous investigation MFC Feb 2003 */
// From Castanets.wav
static const FLOAT snrdef[32] = {
30, 17, 16, 10, 3, 12, 8, 2.5, 5, 5, 6, 6, 5, 6, 10, 6, -4,
-10, -21, -30, -42, -55, -68, -75, -75, -75, -75, -75, -91, -107, -110, -108
};
#ifdef TESTSNR
// Using TMBG song "I am not your broom" about 1min. Psy Model 2
static const FLOAT snrdefa[32] = {
31, 17, 11, 9, 9, 7, 5, 3, 3, 3, 3, 3, 3, 1, -0, -2,
-5, -9, -15, -22, -32, -42, -54, -62, -63, -64, -66, -67, -83, -96, -98, -102
};
// Using Babylon5 "messages from earth: track 6" 15mins. Psy Model 2.
static const FLOAT snrdefb[32] = {
30, 17, 11, 9, 8, 9, 6, 5, 5, 4, 4, 3, 2, -0, -2, -5,
-8, -13, -19, -27, -35, -46, -55, -64, -65, -66, -68, -69, -84, -97, -99, -104
};
// Using Babylon5 "messages from earth: track 6" 15mins. Psy Model 1
static const FLOAT snrdefc[32] = {
32, 26, 22, 18, 16, 14, 12, 11, 10, 9, 9, 8, 6, 6, 4, 2,
0, -2, -7, -12, -18, -27, -35, -47, -53, -54, -56, -57, -57, -70, 0, 0
};
#endif
void psycho_n1(twolame_options * glopts, FLOAT ltmin[2][SBLIMIT], int stereo)
{
int i, k;
for (k = 0; k < stereo; k++)
for (i = 0; i < SBLIMIT; i++)
ltmin[k][i] = snrdef[i];
}
// vim:ts=4:sw=4:nowrap:
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