/***********************************************************************
Copyright?（c）?2006-2012?Skype?Limited.?All?rights?reserved.?
Redistribution?and?use?in?source?and?binary?forms?with?or?without?
modification?（subject?to?the?limitations?in?the?disclaimer?below）?
are?permitted?provided?that?the?following?conditions?are?met:
-?Redistributions?of?source?code?must?retain?the?above?copyright?notice
this?list?of?conditions?and?the?following?disclaimer.
-?Redistributions?in?binary?form?must?reproduce?the?above?copyright?
notice?this?list?of?conditions?and?the?following?disclaimer?in?the?
documentation?and/or?other?materials?provided?with?the?distribution.
-?Neither?the?name?of?Skype?Limited?nor?the?names?of?specific?
contributors?may?be?used?to?endorse?or?promote?products?derived?from?
this?software?without?specific?prior?written?permission.
NO?EXPRESS?OR?IMPLIED?LICENSES?TO?ANY?PARTY‘S?PATENT?RIGHTS?ARE?GRANTED?
BY?THIS?LICENSE.?THIS?SOFTWARE?IS?PROVIDED?BY?THE?COPYRIGHT?HOLDERS?AND?
CONTRIBUTORS?‘‘AS?IS‘‘?AND?ANY?EXPRESS?OR?IMPLIED?WARRANTIES?INCLUDING
BUT?NOT?LIMITED?TO?THE?IMPLIED?WARRANTIES?OF?MERCHANTABILITY?AND?
FITNESS?FOR?A?PARTICULAR?PURPOSE?ARE?DISCLAIMED.?IN?NO?EVENT?SHALL?THE?
COPYRIGHT?OWNER?OR?CONTRIBUTORS?BE?LIABLE?FOR?ANY?DIRECT?INDIRECT?
INCIDENTAL?SPECIAL?EXEMPLARY?OR?CONSEQUENTIAL?DAMAGES?（INCLUDING?BUT
NOT?LIMITED?TO?PROCUREMENT?OF?SUBSTITUTE?GOODS?OR?SERVICES;?LOSS?OF?
USE?DATA?OR?PROFITS;?OR?BUSINESS?INTERRUPTION）?HOWEVER?CAUSED?AND?ON?
ANY?THEORY?OF?LIABILITY?WHETHER?IN?CONTRACT?STRICT?LIABILITY?OR?TORT?
（INCLUDING?NEGLIGENCE?OR?OTHERWISE）?ARISING?IN?ANY?WAY?OUT?OF?THE?USE?
OF?THIS?SOFTWARE?EVEN?IF?ADVISED?OF?THE?POSSIBILITY?OF?SUCH?DAMAGE.
***********************************************************************/

/*?Conversion?between?prediction?filter?coefficients?and?NLSFs??*/
/*?Requires?the?order?to?be?an?even?number??????????????????????*/
/*?A?piecewise?linear?approximation?maps?LSF?<->?cos（LSF）???????*/
/*?Therefore?the?result?is?not?accurate?NLSFs?but?the?two??????*/
/*?function?are?accurate?inverses?of?each?other?????????????????*/

#include?“SKP_Silk_SigProc_FIX.h“

/*?Number?of?binary?divisions?*/
#define?BIN_DIV_STEPS_A2NLSF_FIX??????3?/*?must?be?no?higher?than?16?-?log2（?LSF_COS_TAB_SZ_FIX?）?*/
#define?QPoly????????????????????????16
#define?MAX_ITERATIONS_A2NLSF_FIX????30

/*?Flag?for?using?2x?as?many?cosine?sampling?points?reduces?the?risk?of?missing?a?root?*/
#define?OVERSAMPLE_COSINE_TABLE???????0

/*?Helper?function?for?A2NLSF（..）????????????????????*/
/*?Transforms?polynomials?from?cos（n*f）?to?cos（f）^n??*/
SKP_INLINE?void?SKP_Silk_A2NLSF_trans_poly（
????SKP_int32????????*p????/*?I/O????Polynomial????????????????????????????????*/
????const?SKP_int????dd?????/*?I??????Polynomial?order?（=?filter?order?/?2?）????*/
）
{
????SKP_int?k?n;
????
????for（?k?=?2;?k?<=?dd;?k++?）?{
????????for（?n?=?dd;?n?>?k;?n--?）?{
????????????p[?n?-?2?]?-=?p[?n?];
????????}
????????p[?k?-?2?]?-=?SKP_LSHIFT

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????4262??2018-02-04?11:55??微信小程序紅包源代碼\前端\app.js

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