📄 masking.h
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/********************************************************************
* *
* 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 1994-2002 *
* by the XIPHOPHORUS Company http://www.xiph.org/ *
* *
********************************************************************
function: masking curve data for psychoacoustics
last mod: $Id: masking.h,v 1.24 2002/07/01 11:20:11 xiphmont Exp $
********************************************************************/
#ifndef _V_MASKING_H_
#define _V_MASKING_H_
/* more detailed ATH; the bass if flat to save stressing the floor
overly for only a bin or two of savings. */
#define MAX_ATH 88
static float ATH[]={
/*15*/ -51, -52, -53, -54, -55, -56, -57, -58,
/*31*/ -59, -60, -61, -62, -63, -64, -65, -66,
/*63*/ -67, -68, -69, -70, -71, -72, -73, -74,
/*125*/ -75, -76, -77, -78, -80, -81, -82, -83,
/*250*/ -84, -85, -86, -87, -88, -88, -89, -89,
/*500*/ -90, -91, -91, -92, -93, -94, -95, -96,
/*1k*/ -96, -97, -98, -98, -99, -99,-100,-100,
/*2k*/ -101,-102,-103,-104,-106,-107,-107,-107,
/*4k*/ -107,-105,-103,-102,-101, -99, -98, -96,
/*8k*/ -95, -95, -96, -97, -96, -95, -93, -90,
/*16k*/ -80, -70, -50, -40, -30, -30, -30, -30
};
/* The tone masking curves from Ehmer's and Fielder's papers have been
replaced by an empirically collected data set. The previously
published values were, far too often, simply on crack. */
#define EHMER_OFFSET 16
#define EHMER_MAX 56
/* masking tones from -50 to 0dB, 62.5 through 16kHz at half octaves
test tones from -2 octaves to +5 octaves sampled at eighth octaves */
/* (Vorbis 0dB, the loudest possible tone, is assumed to be ~100dB SPL
for collection of these curves) */
static float tonemasks[P_BANDS][6][EHMER_MAX]={
/* 62.5 Hz */
{{ -60, -60, -60, -60, -60, -60, -60, -60,
-60, -60, -60, -60, -62, -62, -65, -73,
-69, -68, -68, -67, -70, -70, -72, -74,
-75, -79, -79, -80, -83, -88, -93, -100,
-110, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -48, -48, -48, -48, -48, -48, -48, -48,
-48, -48, -48, -48, -48, -53, -61, -66,
-66, -68, -67, -70, -76, -76, -72, -73,
-75, -76, -78, -79, -83, -88, -93, -100,
-110, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -37, -37, -37, -37, -37, -37, -37, -37,
-38, -40, -42, -46, -48, -53, -55, -62,
-65, -58, -56, -56, -61, -60, -65, -67,
-69, -71, -77, -77, -78, -80, -82, -84,
-88, -93, -98, -106, -112, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -25, -25, -25, -25, -25, -25, -25, -25,
-25, -26, -27, -29, -32, -38, -48, -52,
-52, -50, -48, -48, -51, -52, -54, -60,
-67, -67, -66, -68, -69, -73, -73, -76,
-80, -81, -81, -85, -85, -86, -88, -93,
-100, -110, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -16, -16, -16, -16, -16, -16, -16, -16,
-17, -19, -20, -22, -26, -28, -31, -40,
-47, -39, -39, -40, -42, -43, -47, -51,
-57, -52, -55, -55, -60, -58, -62, -63,
-70, -67, -69, -72, -73, -77, -80, -82,
-83, -87, -90, -94, -98, -104, -115, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -8, -8, -8, -8, -8, -8, -8, -8,
-8, -8, -10, -11, -15, -19, -25, -30,
-34, -31, -30, -31, -29, -32, -35, -42,
-48, -42, -44, -46, -50, -50, -51, -52,
-59, -54, -55, -55, -58, -62, -63, -66,
-72, -73, -76, -75, -78, -80, -80, -81,
-84, -88, -90, -94, -98, -101, -106, -110}},
/* 88Hz */
{{ -66, -66, -66, -66, -66, -66, -66, -66,
-66, -66, -66, -66, -66, -67, -67, -67,
-76, -72, -71, -74, -76, -76, -75, -78,
-79, -79, -81, -83, -86, -89, -93, -97,
-100, -105, -110, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -47, -47, -47, -47, -47, -47, -47, -47,
-47, -47, -47, -48, -51, -55, -59, -66,
-66, -66, -67, -66, -68, -69, -70, -74,
-79, -77, -77, -78, -80, -81, -82, -84,
-86, -88, -91, -95, -100, -108, -116, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -36, -36, -36, -36, -36, -36, -36, -36,
-36, -37, -37, -41, -44, -48, -51, -58,
-62, -60, -57, -59, -59, -60, -63, -65,
-72, -71, -70, -72, -74, -77, -76, -78,
-81, -81, -80, -83, -86, -91, -96, -100,
-105, -110, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -28, -28, -28, -28, -28, -28, -28, -28,
-28, -30, -32, -32, -33, -35, -41, -49,
-50, -49, -47, -48, -48, -52, -51, -57,
-65, -61, -59, -61, -64, -69, -70, -74,
-77, -77, -78, -81, -84, -85, -87, -90,
-92, -96, -100, -107, -112, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -19, -19, -19, -19, -19, -19, -19, -19,
-20, -21, -23, -27, -30, -35, -36, -41,
-46, -44, -42, -40, -41, -41, -43, -48,
-55, -53, -52, -53, -56, -59, -58, -60,
-67, -66, -69, -71, -72, -75, -79, -81,
-84, -87, -90, -93, -97, -101, -107, -114,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -9, -9, -9, -9, -9, -9, -9, -9,
-11, -12, -12, -15, -16, -20, -23, -30,
-37, -34, -33, -34, -31, -32, -32, -38,
-47, -44, -41, -40, -47, -49, -46, -46,
-58, -50, -50, -54, -58, -62, -64, -67,
-67, -70, -72, -76, -79, -83, -87, -91,
-96, -100, -104, -110, -999, -999, -999, -999}},
/* 125 Hz */
{{ -62, -62, -62, -62, -62, -62, -62, -62,
-62, -62, -63, -64, -66, -67, -66, -68,
-75, -72, -76, -75, -76, -78, -79, -82,
-84, -85, -90, -94, -101, -110, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -59, -59, -59, -59, -59, -59, -59, -59,
-59, -59, -59, -60, -60, -61, -63, -66,
-71, -68, -70, -70, -71, -72, -72, -75,
-81, -78, -79, -82, -83, -86, -90, -97,
-103, -113, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -53, -53, -53, -53, -53, -53, -53, -53,
-53, -54, -55, -57, -56, -57, -55, -61,
-65, -60, -60, -62, -63, -63, -66, -68,
-74, -73, -75, -75, -78, -80, -80, -82,
-85, -90, -96, -101, -108, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -46, -46, -46, -46, -46, -46, -46, -46,
-46, -46, -47, -47, -47, -47, -48, -51,
-57, -51, -49, -50, -51, -53, -54, -59,
-66, -60, -62, -67, -67, -70, -72, -75,
-76, -78, -81, -85, -88, -94, -97, -104,
-112, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -36, -36, -36, -36, -36, -36, -36, -36,
-39, -41, -42, -42, -39, -38, -41, -43,
-52, -44, -40, -39, -37, -37, -40, -47,
-54, -50, -48, -50, -55, -61, -59, -62,
-66, -66, -66, -69, -69, -73, -74, -74,
-75, -77, -79, -82, -87, -91, -95, -100,
-108, -115, -999, -999, -999, -999, -999, -999},
{ -28, -26, -24, -22, -20, -20, -23, -29,
-30, -31, -28, -27, -28, -28, -28, -35,
-40, -33, -32, -29, -30, -30, -30, -37,
-45, -41, -37, -38, -45, -47, -47, -48,
-53, -49, -48, -50, -49, -49, -51, -52,
-58, -56, -57, -56, -60, -61, -62, -70,
-72, -74, -78, -83, -88, -93, -100, -106}},
/* 177 Hz */
{{-999, -999, -999, -999, -999, -999, -999, -999,
-999, -110, -105, -100, -95, -91, -87, -83,
-80, -78, -76, -78, -78, -81, -83, -85,
-86, -85, -86, -87, -90, -97, -107, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{-999, -999, -999, -110, -105, -100, -95, -90,
-85, -81, -77, -73, -70, -67, -67, -68,
-75, -73, -70, -69, -70, -72, -75, -79,
-84, -83, -84, -86, -88, -89, -89, -93,
-98, -105, -112, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{-105, -100, -95, -90, -85, -80, -76, -71,
-68, -68, -65, -63, -63, -62, -62, -64,
-65, -64, -61, -62, -63, -64, -66, -68,
-73, -73, -74, -75, -76, -81, -83, -85,
-88, -89, -92, -95, -100, -108, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -80, -75, -71, -68, -65, -63, -62, -61,
-61, -61, -61, -59, -56, -57, -53, -50,
-58, -52, -50, -50, -52, -53, -54, -58,
-67, -63, -67, -68, -72, -75, -78, -80,
-81, -81, -82, -85, -89, -90, -93, -97,
-101, -107, -114, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{ -65, -61, -59, -57, -56, -55, -55, -56,
-56, -57, -55, -53, -52, -47, -44, -44,
-50, -44, -41, -39, -39, -42, -40, -46,
-51, -49, -50, -53, -54, -63, -60, -61,
-62, -66, -66, -66, -70, -73, -74, -75,
-76, -75, -79, -85, -89, -91, -96, -102,
-110, -999, -999, -999, -999, -999, -999, -999},
{ -52, -50, -49, -49, -48, -48, -48, -49,
-50, -50, -49, -46, -43, -39, -35, -33,
-38, -36, -32, -29, -32, -32, -32, -35,
-44, -39, -38, -38, -46, -50, -45, -46,
-53, -50, -50, -50, -54, -54, -53, -53,
-56, -57, -59, -66, -70, -72, -74, -79,
-83, -85, -90, -97, -114, -999, -999, -999}},
/* 250 Hz */
{{-999, -999, -999, -999, -999, -999, -110, -105,
-100, -95, -90, -86, -80, -75, -75, -79,
-80, -79, -80, -81, -82, -88, -95, -103,
-110, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{-999, -999, -999, -999, -108, -103, -98, -93,
-88, -83, -79, -78, -75, -71, -67, -68,
-73, -73, -72, -73, -75, -77, -80, -82,
-88, -93, -100, -107, -114, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{-999, -999, -999, -110, -105, -101, -96, -90,
-86, -81, -77, -73, -69, -66, -61, -62,
-66, -64, -62, -65, -66, -70, -72, -76,
-81, -80, -84, -90, -95, -102, -110, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{-999, -999, -999, -107, -103, -97, -92, -88,
-83, -79, -74, -70, -66, -59, -53, -58,
-62, -55, -54, -54, -54, -58, -61, -62,
-72, -70, -72, -75, -78, -80, -81, -80,
-83, -83, -88, -93, -100, -107, -115, -999,
-999, -999, -999, -999, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{-999, -999, -999, -105, -100, -95, -90, -85,
-80, -75, -70, -66, -62, -56, -48, -44,
-48, -46, -46, -43, -46, -48, -48, -51,
-58, -58, -59, -60, -62, -62, -61, -61,
-65, -64, -65, -68, -70, -74, -75, -78,
-81, -86, -95, -110, -999, -999, -999, -999,
-999, -999, -999, -999, -999, -999, -999, -999},
{-999, -999, -105, -100, -95, -90, -85, -80,
-75, -70, -65, -61, -55, -49, -39, -33,
-40, -35, -32, -38, -40, -33, -35, -37,
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