/*
?*?Asterisk?--?An?open?source?telephony?toolkit.
?*
?*?Copyright?（C）?1999?-?2005?Digium?Inc.
?*
?*?Mark?Spencer?
?*
?*?Goertzel?routines?are?borrowed?from?Steve?Underwood‘s?tremendous?work?on?the
?*?DTMF?detector.
?*
?*?See?http://www.asterisk.org?for?more?information?about
?*?the?Asterisk?project.?Please?do?not?directly?contact
?*?any?of?the?maintainers?of?this?project?for?assistance;
?*?the?project?provides?a?web?site?mailing?lists?and?IRC
?*?channels?for?your?use.
?*
?*?This?program?is?free?software?distributed?under?the?terms?of
?*?the?GNU?General?Public?License?Version?2.?See?the?LICENSE?file
?*?at?the?top?of?the?source?tree.
?*/

/*!?\file
?*
?*?\brief?Convenience?Signal?Processing?routines
?*
?*?\author?Mark?Spencer?
?*?\author?Steve?Underwood?
?*/

/*?Some?routines?from?tone_detect.c?by?Steven?Underwood?as?published?under?the?zapata?library?*/
/*
	tone_detect.c?-?General?telephony?tone?detection?and?specific
					detection?of?DTMF.

	Copyright?（C）?2001??Steve?Underwood?

	Despite?my?general?liking?of?the?GPL?I?place?this?code?in?the
	public?domain?for?the?benefit?of?all?mankind?-?even?the?slimy
	ones?who?might?try?to?proprietize?my?work?and?use?it?to?my
	detriment.
*/

/*
??modifications?for?decoding?also?damaged?audio?by?Luigi?auriemma?“//?aluigi?work-around“
*/

#include?
#include?
#include?
#include?
#include?
#include?

#define	DSP_DIGITMODE_DTMF			0				/*!#define?DSP_DIGITMODE_MF			1				/*!
#define?DSP_DIGITMODE_NOQUELCH		（1?<#define?DSP_DIGITMODE_RELAXDTMF		（1?<
#define	MAX_DTMF_DIGITS		1024

/*?Basic?DTMF?specs:
?*
?*?Minimum?tone?on?=?40ms
?*?Minimum?tone?off?=?50ms
?*?Maximum?digit?rate?=?10?per?second
?*?Normal?twist?<=?8dB?accepted
?*?Reverse?twist?<=?4dB?accepted
?*?S/N?>=?15dB?will?detect?OK
?*?Attenuation?<=?26dB?will?detect?OK
?*?Frequency?tolerance?+-?1.5%?will?detect?+-3.5%?will?reject
?*/

//#define?DTMF_THRESHOLD		8.0e7
#define?DTMF_THRESHOLD??????800000000.0?//?aluigi?work-around
#define?DTMF_NORMAL_TWIST	6.3?????/*?8dB?*/
#ifdef	RADIO_RELAX
#define?DTMF_REVERSE_TWIST??????????（（digitmode?&?DSP_DIGITMODE_RELAXDTMF）???6.5?:?2.5）?????/*?4dB?normal?*/
#else
#define?DTMF_REVERSE_TWIST??????????（（digitmode?&?DSP_DIGITMODE_RELAXDTMF）???4.0?:?2.5）?????/*?4dB?normal?*/
#endif
#define?DTMF_RELATIVE_PEAK_ROW	6.3?????/*?8dB?*/
#define?DTMF_RELATIVE_PEAK_COL	6.3?????/*?8dB?*/
#define?DTMF_2ND_HARMONIC_ROW???????（（digitmode?&?DSP_DIGITMODE_RELAXDTMF）???1.7?:?2.5）?????/*?4dB?normal?*/
#define?DTMF_2ND_HARMONIC_COL	63.1????/*?18dB?*/
#define?DTMF_TO_TOTAL_ENERGY	42.0

//#define?BELL_MF_THRESHOLD	1.6e9
#define?BELL_MF_THRESHOLD???DTMF_THRESHOLD??//?aluigi?work-around
#define?BELL_MF_TWIST		4.0?????/*?6dB?*/
#define?BELL_MF_RELATIVE_PEAK	12.6????/*?11dB?*/

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

?????文件??????????5??2012-09-02?09:29??a.bat

?????文件??????14642??2008-03-31?14:12??dsp.c

?????文件???????9842??2008-06-05?23:39??dtmf2num.c

?????文件??????17920??2008-06-05?23:40??dtmf2num.exe

?????文件????????343??2008-04-05?15:56??Makefile

?????文件???????6172??2006-08-06?11:06??mywav.h

?????文件??????11598??2008-03-30?21:19??resample2.c

?????文件??????56364??2012-09-02?01:19??t1.wav

-----------?---------??----------?-----??----

???????????????116886????????????????????8