mirror of
https://github.com/TorqueGameEngines/Torque3D.git
synced 2026-03-27 16:19:34 +00:00
a745fc3757
added libraries: opus flac libsndfile updated: libvorbis libogg openal - Everything works as expected for now. Bare in mind libsndfile needed the check for whether or not it could find the xiph libraries removed in order for this to work.
93 lines
3.2 KiB
C
93 lines
3.2 KiB
C
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
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* by the Xiph.Org Foundation https://xiph.org/ *
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* *
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********************************************************************
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function: lookup based functions
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********************************************************************/
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#include <math.h>
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#include "lookup.h"
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#include "lookup_data.h"
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#include "os.h"
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#include "misc.h"
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#ifdef FLOAT_LOOKUP
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/* interpolated lookup based cos function, domain 0 to PI only */
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float vorbis_coslook(float a){
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double d=a*(.31830989*(float)COS_LOOKUP_SZ);
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int i=vorbis_ftoi(d-.5);
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return COS_LOOKUP[i]+ (d-i)*(COS_LOOKUP[i+1]-COS_LOOKUP[i]);
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}
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/* interpolated 1./sqrt(p) where .5 <= p < 1. */
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float vorbis_invsqlook(float a){
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double d=a*(2.f*(float)INVSQ_LOOKUP_SZ)-(float)INVSQ_LOOKUP_SZ;
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int i=vorbis_ftoi(d-.5f);
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return INVSQ_LOOKUP[i]+ (d-i)*(INVSQ_LOOKUP[i+1]-INVSQ_LOOKUP[i]);
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}
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/* interpolated 1./sqrt(p) where .5 <= p < 1. */
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float vorbis_invsq2explook(int a){
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return INVSQ2EXP_LOOKUP[a-INVSQ2EXP_LOOKUP_MIN];
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}
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#include <stdio.h>
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/* interpolated lookup based fromdB function, domain -140dB to 0dB only */
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float vorbis_fromdBlook(float a){
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int i=vorbis_ftoi(a*((float)(-(1<<FROMdB2_SHIFT)))-.5f);
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return (i<0)?1.f:
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((i>=(FROMdB_LOOKUP_SZ<<FROMdB_SHIFT))?0.f:
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FROMdB_LOOKUP[i>>FROMdB_SHIFT]*FROMdB2_LOOKUP[i&FROMdB2_MASK]);
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}
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#endif
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#ifdef INT_LOOKUP
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/* interpolated 1./sqrt(p) where .5 <= a < 1. (.100000... to .111111...) in
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16.16 format
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returns in m.8 format */
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long vorbis_invsqlook_i(long a,long e){
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long i=(a&0x7fff)>>(INVSQ_LOOKUP_I_SHIFT-1);
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long d=(a&INVSQ_LOOKUP_I_MASK)<<(16-INVSQ_LOOKUP_I_SHIFT); /* 0.16 */
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long val=INVSQ_LOOKUP_I[i]- /* 1.16 */
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(((INVSQ_LOOKUP_I[i]-INVSQ_LOOKUP_I[i+1])* /* 0.16 */
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d)>>16); /* result 1.16 */
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e+=32;
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if(e&1)val=(val*5792)>>13; /* multiply val by 1/sqrt(2) */
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e=(e>>1)-8;
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return(val>>e);
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}
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/* interpolated lookup based fromdB function, domain -140dB to 0dB only */
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/* a is in n.12 format */
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float vorbis_fromdBlook_i(long a){
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int i=(-a)>>(12-FROMdB2_SHIFT);
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return (i<0)?1.f:
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((i>=(FROMdB_LOOKUP_SZ<<FROMdB_SHIFT))?0.f:
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FROMdB_LOOKUP[i>>FROMdB_SHIFT]*FROMdB2_LOOKUP[i&FROMdB2_MASK]);
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}
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/* interpolated lookup based cos function, domain 0 to PI only */
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/* a is in 0.16 format, where 0==0, 2^^16-1==PI, return 0.14 */
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long vorbis_coslook_i(long a){
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int i=a>>COS_LOOKUP_I_SHIFT;
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int d=a&COS_LOOKUP_I_MASK;
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return COS_LOOKUP_I[i]- ((d*(COS_LOOKUP_I[i]-COS_LOOKUP_I[i+1]))>>
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COS_LOOKUP_I_SHIFT);
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}
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#endif
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