ref: 6db18e8784b845cfda99b7f8dab8a158aec6a26f
dir: /sys/src/cmd/audio/libvorbis/modes/psych_8.h/
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
* by the Xiph.Org Foundation https://xiph.org/ *
* *
********************************************************************
function: 8kHz psychoacoustic settings
********************************************************************/
static const att3 _psy_tone_masteratt_8[3]={
{{ 32, 25, 12}, 0, 0}, /* 0 */
{{ 30, 25, 12}, 0, 0}, /* 0 */
{{ 20, 0, -14}, 0, 0}, /* 0 */
};
static const vp_adjblock _vp_tonemask_adj_8[3]={
/* adjust for mode zero */
/* 63 125 250 500 1 2 4 8 16 */
{{-15,-15,-15,-15,-10,-10, -6, 0, 0, 0, 0,10, 0, 0,99,99,99}}, /* 1 */
{{-15,-15,-15,-15,-10,-10, -6, 0, 0, 0, 0,10, 0, 0,99,99,99}}, /* 1 */
{{-15,-15,-15,-15,-10,-10, -6, 0, 0, 0, 0, 0, 0, 0,99,99,99}}, /* 1 */
};
static const noise3 _psy_noisebias_8[3]={
/* 63 125 250 500 1k 2k 4k 8k 16k*/
{{{-10,-10,-10,-10, -5, -5, -5, 0, 4, 8, 8, 8, 10, 10, 99, 99, 99},
{-10,-10,-10,-10, -5, -5, -5, 0, 0, 4, 4, 4, 4, 4, 99, 99, 99},
{-30,-30,-30,-30,-30,-24,-20,-14,-10, -6, -8, -8, -6, -6, 99, 99, 99}}},
{{{-10,-10,-10,-10, -5, -5, -5, 0, 4, 8, 8, 8, 10, 10, 99, 99, 99},
{-10,-10,-10,-10,-10,-10, -5, -5, -5, 0, 0, 0, 0, 0, 99, 99, 99},
{-30,-30,-30,-30,-30,-24,-20,-14,-10, -6, -8, -8, -6, -6, 99, 99, 99}}},
{{{-15,-15,-15,-15,-15,-12,-10, -8, 0, 2, 4, 4, 5, 5, 99, 99, 99},
{-30,-30,-30,-30,-26,-22,-20,-14,-12,-12,-10,-10,-10,-10, 99, 99, 99},
{-30,-30,-30,-30,-26,-26,-26,-26,-26,-26,-26,-26,-26,-24, 99, 99, 99}}},
};
/* stereo mode by base quality level */
static const adj_stereo _psy_stereo_modes_8[3]={
/* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 */
{{ 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3},
{ 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4},
{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
{ 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99}},
{{ 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3},
{ 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4},
{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
{ 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99}},
{{ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3},
{ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4},
{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
{ 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99}},
};
static const noiseguard _psy_noiseguards_8[2]={
{10,10,-1},
{10,10,-1},
};
static const compandblock _psy_compand_8[2]={
{{
0, 1, 2, 3, 4, 5, 6, 7, /* 7dB */
8, 8, 9, 9,10,10,11, 11, /* 15dB */
12,12,13,13,14,14,15, 15, /* 23dB */
16,16,17,17,17,18,18, 19, /* 31dB */
19,19,20,21,22,23,24, 25, /* 39dB */
}},
{{
0, 1, 2, 3, 4, 5, 6, 6, /* 7dB */
7, 7, 6, 6, 5, 5, 4, 4, /* 15dB */
3, 3, 3, 4, 5, 6, 7, 8, /* 23dB */
9,10,11,12,13,14,15, 16, /* 31dB */
17,18,19,20,21,22,23, 24, /* 39dB */
}},
};
static const double _psy_lowpass_8[3]={3.,4.,4.};
static const int _noise_start_8[2]={
64,64,
};
static const int _noise_part_8[2]={
8,8,
};
static const int _psy_ath_floater_8[3]={
-100,-100,-105,
};
static const int _psy_ath_abs_8[3]={
-130,-130,-140,
};