/*

（c）?Microsoft?Corporation.?All?rights?reserved.?

*/
//
//		MISC.C	-	Watermarking?of?audio?-?miscellaneous?functions
//
//		（c）?1999?Microsoft?Corp.
//
//		History:
//
//		14/Jun/99?-?Darko?Kirovski?first?version?based?on?his?Matlab?code
//		29/Jun/99?-?Rico?Malvar?using?analog?warping?function
//		30/Jun/99?-?Rico?Malvar?miscellaneous?codes?to?read/write?key/ID?bits
//		02/Jul/99?-?Darko?&?Rico?-?new?width?control?for?nonlinear?subbands

#include?“wmark.h“

//?------------------------------------------------------------
//?Routine?to?warp?the?frequency?scale?to?support?frequency?scale?changes

float?warpfreq（float?x?float?a）
{
	return（（exp（a*x）?-?1）?/?（exp（a）?-?1）?）;
}

//?------------------------------------------------------------
//?Routine?to?generate?subband?limits

void?gensubindex（SSBANDS?*ssbands?long?fs?float?scalefactor）?{
	int		bit;
	int		fc;
	float	freq?x?y?a;

	//?First?define?bits?for?SS?subbands?on?which?the?chips?carrying
	//?the?CCI?bits?will?be?inserted
	//
	//?The?band?from?FWCCIMIN?to?FWMAX?is?divided?in?CHIPSPERBLOCK?subbands
	//
	//	?FWCCIMIN?????????????????????????????????????FWMAX
	//	????|---------|---------|---?.?.?.?---|---------|
	//??????????:?????????:???????????????????????:
	//????????bit?0?????bit?1?????????????bit?CHIPSPERBLOCK-1
	//
	//?The?bands?are?not?uniformly?distributed.?The?parameter?SPEEDUP?controls
	//?the?subband?with?distortion:?higgher?subbands?should?be?wider?as?we
	//?increase?speedup.
	//?The?main?trick:?figure?out?how?much?the?last?subband?width?needs?to
	//?be?amplified;?that‘s?the?parameter?g

????//?first?determine?a?from?max?gradient?of?warp
	a?=?1.7?*?log（1?+?SPEEDUP?*?CHIPSPERBLOCK）?+?0.5?*?（SPEEDUP?*?CHIPSPERBLOCK）;?
	fc?=?（int）?（（FWMIN?*?scalefactor?*?2.0?/?fs）?*?（float）?NFREQ）;
	bit?=?0;
????//?start?at?index?corresponding?to?FWCCIMIN
	ssbands->fstart[0]?=?fc;?
	while?（bit?		x?=?（bit?+?1.0）?/?CHIPSPERBLOCK;
		y?=?warpfreq（x?a）;
????????//?analog?frequency?in?Hz
		freq?=?FWMIN?+?（FWMAX-FWMIN）?*?y;?
????????//?convert?to?index
		fc?=?（int）?（freq?*?scalefactor?*?（2.0?/?fs）?*?NFREQ）;?
		ssbands->fend[bit]?=?fc;
		ssbands->fmiddle[bit]?=?（ssbands->fstart[bit]?+?fc）?/?2;
		//?????ssbands->width[bit]?=?ssbands->fend[bit]?-?ssbands->fstart[bit]?+?1;
		bit++;
		if?（bit?==?CHIPSPERBLOCK）?break;
		ssbands->fstart[bit]?=?fc?+?1;
	}
#ifdef?PRINT_SUBBAND_INDEX
????{
		FILE?*f;
		int?i;
		f?=?fopen（“subband_index.m“?“w“）;
		fprintf（f?“sbi=[\n“）;
		for?（bit?=?0;?bit?			for?（i?=?0;?i?				fprintf（f?“%d?%d?%d\t“?ssbands->fstart[bit]?ssbands->fmiddle[bit]?ssbands->fend[bit]）;
			fprintf（f?“\n“）;
		}
		fprintf（f?“];\n“）;
		fclose（f）;
	}
#endif
}

//?------------------------------------------------------------
//?Routines?to?convert?seconds?to?MM:SS:MSMS?string

static?char?tmpstr[200];

char?*ftimestr（float?secs）
{
	int		i;
	i

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----
?????目錄???????????0??2018-08-22?08:59??audiowatermarkingtool\
?????目錄???????????0??2005-08-08?10:38??audiowatermarkingtool\build\
?????目錄???????????0??2005-08-08?10:27??audiowatermarkingtool\build\detect2003\
?????目錄???????????0??2005-08-08?10:35??audiowatermarkingtool\build\detect2003\Debug\
?????文件????????3939??2005-08-08?10:38??audiowatermarkingtool\build\detect2003\detect2003.vcproj
?????目錄???????????0??2005-08-08?10:39??audiowatermarkingtool\build\detect2003\Release\
?????文件??????106496??2005-08-08?10:38??audiowatermarkingtool\build\detect2003.exe
?????目錄???????????0??2005-08-08?10:11??audiowatermarkingtool\build\lib\
?????文件???????40842??2005-08-05?12:32??audiowatermarkingtool\build\lib\internal2003.lib
?????目錄???????????0??2005-08-08?10:36??audiowatermarkingtool\build\watermark2003\
?????目錄???????????0??2005-08-08?10:35??audiowatermarkingtool\build\watermark2003\Debug\
?????目錄???????????0??2005-08-08?10:39??audiowatermarkingtool\build\watermark2003\Release\
?????文件????????3949??2005-08-08?10:37??audiowatermarkingtool\build\watermark2003\watermark2003.vcproj
?????文件???????94208??2005-08-08?10:38??audiowatermarkingtool\build\watermark2003.exe
?????文件??????101376??2005-08-08?10:39??audiowatermarkingtool\build\watermark2003.ncb
?????文件????????1445??2005-08-08?10:29??audiowatermarkingtool\build\watermark2003.sln
?????文件???????14336??2005-08-08?10:39??audiowatermarkingtool\build\watermark2003.suo
?????文件????????6009??2005-08-05?11:13??audiowatermarkingtool\license.txt
?????文件?????????764??2005-08-05?11:20??audiowatermarkingtool\readme.txt
?????目錄???????????0??2005-08-08?10:40??audiowatermarkingtool\src\
?????文件????????1256??2005-08-05?11:09??audiowatermarkingtool\src\fxform.h
?????文件?????????640??2005-08-05?11:09??audiowatermarkingtool\src\hthres.h
?????文件????????7096??2005-08-05?11:09??audiowatermarkingtool\src\misc.c
?????文件???????16433??2005-08-05?11:09??audiowatermarkingtool\src\waveio.h
?????文件???????11703??2005-08-05?11:09??audiowatermarkingtool\src\wmadd.c
?????文件????????6618??2005-08-05?11:09??audiowatermarkingtool\src\wmark.c
?????文件????????6579??2005-08-05?11:09??audiowatermarkingtool\src\wmark.h
?????文件???????40451??2005-08-05?11:09??audiowatermarkingtool\src\wmtest.c