/*
?*?===================================================================
?*??TS?26.104
?*??R99???V3.5.0?2003-03
?*??REL-4?V4.4.0?2003-03
?*??REL-5?V5.1.0?2003-03
?*??3GPP?AMR?Floating-point?Speech?Codec
?*?===================================================================
?*
?*/

/*
?*?interf_dec.c
?*
?*
?*?Project:
?*?????AMR?Floating-Point?Codec
?*
?*?Contains:
?*????This?module?provides?means?to?conversion?from?3GPP?or?ETSI
?*????bitstream?to?AMR?parameters
?*/

/*
?*?include?files
?*/
#include?
#include?
#include?
#include?“typedef.h“
#include?“sp_dec.h“
#include?“interf_rom.h“
#include?“rom_dec.h“

/*
?*?definition?of?constants
?*/
#define?EHF_MASK?0x0008?/*?encoder?homing?frame?pattern?*/
typedef

struct
{
???int?reset_flag_old;???/*?previous?was?homing?frame?*/


???enum?RXframeType?prev_ft;???/*?previous?frame?type?*/
???enum?Mode?prev_mode;???/*?previous?mode?*/
???void?*decoder_State;???/*?Points?decoder?state?*/


}dec_interface_State;

#ifdef?ETSI


/*
?*?Bin2Int
?*
?*
?*?Parameters:
?*????no_of_bits????????I:?number?of?bits?associated?with?value
?*????bits??????????????O:?address?where?bits?are?written
?*
?*?Function:
?*????Read?nuber?of?bits?from?the?array?and?convert?to?integer.
?*
?*?Returns:
?*????value
?*/
static?Word16?Bin2Int（?Word16?no_of_bits?Word16?*bitstream?）
{
???Word32?value?i?bit;


???value?=?0;

???for?（?i?=?0;?i???????value?=?value?<??????bit?=?*bitstream++;

??????if?（?bit?==?0x1?）
?????????value?=?value?+?1;
???}
???return（?Word16?）（?value?）;
}


/*
?*?Bits2Prm
?*
?*
?*?Parameters:
?*????mode??????????????I:?AMR?mode
?*????bits??????????????I:?serial?bits
?*????param?????????????O:?AMR?parameters
?*
?*?Function:
?*????Retrieves?the?vector?of?encoder?parameters?from
?*????the?received?serial?bits?in?a?frame.
?*
?*?Returns:
?*????void
?*/
static?void?Bits2Prm（?enum?Mode?mode?Word16?bits[]?Word16?prm[]?）
{
???Word32?i;


???switch?（?mode?）?{
??????case?MR122:
?????????for?（?i?=?0;?i?????????????prm[i]?=?Bin2Int（?bitno_MR122[i]?bits?）;
????????????bits?+=?bitno_MR122[i];
?????????}
?????????break;

??????case?MR102:
?????????for?（?i?=?0;?i?????????????prm[i]?=?Bin2Int（?bitno_MR102[i]?bits?）;
????????????bits?+=?bitno_MR102[i];
?????????}
?????????break;

??????case?MR795:
?????????for?（?i?=?0;?i?????????????prm[i]?=?Bin2Int（?bitno_MR795[i]?bits?）;
????????????bits?+=?bitno_MR795[i];
?????????}
?????????break;

??????case?MR74:
?????????for?（?i?=?0;?i?????????????prm[i]?=?Bin2Int（?bitno_MR74[i]?bits?）;
????????????bits?+=?bitno_MR74[i];
?????????}
?????????break;

??????case?MR67:
?????????for?（?i?=?0;?i?????????????prm[i]?=?Bin2Int（?bitno_MR67[i]?bits?）;
????????????bits?+=?bitno_MR67[i];
?????????}
?????????break;

??????case?MR59:
?????????for?（?i?=?0;?i?????????????prm[i]?=?Bin2Int（?bitno_MR59[i]?bits?）;
??????????

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

?????文件??????17356??2011-04-23?14:30??interf_enc.c

?????文件???????1090??2011-04-23?14:28??interf_enc.h

?????文件??????23566??2006-07-02?00:21??interf_rom.h

?????文件?????129931??2006-07-30?21:04??rom_dec.h

?????文件?????208869??2006-07-02?00:21??rom_enc.h

?????文件?????154866??2011-04-23?10:25??sp_dec.c

?????文件???????1601??2006-07-02?00:21??sp_dec.h

?????文件?????311388??2011-04-23?10:25??sp_enc.c

?????文件???????1448??2006-07-02?00:21??sp_enc.h

?????文件????????497??2006-07-02?00:21??typedef.h

?????文件???????4469??2011-04-27?08:33??AMRNB.vcproj

?????文件??????18735??2011-04-23?14:29??interf_dec.c

?????文件????????982??2011-04-23?14:09??interf_dec.h

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

???????????????874798????????????????????13