#include?
#include?
#include?
#include?“common.h“

char?*layer_names[3]?=?{?“I“?“II“?“III“?};
int?bitrate[3][15]?=?{
	{0326496128160192224256288320352384416448}
	{0324856648096112128160192224256320384}
	{032404856648096112128160192224256320}
};
double??s_freq[4]?=?{44.1?48?32?0};
char?*mode_names[4]?=?{?“stereo“?“j-stereo“?“dual-ch“?“single-ch“?};


FILE?*OpenTableFile（char?*name）
{
	char?fulname[80];
	FILE?*f;

	fulname[0]?=?‘\0‘;

	strcat（fulname?name）;
	if（?（f=fopen（fulname“r“））==NULL?）?{
		fprintf（stderr“\nOpenTable:?could?not?find?%s\n“?fulname）;
????}
????return?f;
}


void?WriteHdr（frame_params?*fr_ps）
{
	layer?*info?=?fr_ps->header;

	printf（“HDR:??sync=FFF?id=%X?layer=%X?ep=%X?br=%X?sf=%X?pd=%X?“
		info->version?info->lay?!info->error_protection
		info->bitrate_index?info->sampling_frequency?info->padding）;

	printf（“pr=%X?m=%X?js=%X?c=%X?o=%X?e=%X\n“
		info->extension?info->mode?info->mode_ext
		info->copyright?info->original?info->emphasis）;

	printf（“layer=%s?tot?bitrate=%d?sfrq=%.1f?mode=%s?“
		layer_names[info->lay-1]?bitrate[info->lay-1][info->bitrate_index]
		s_freq[info->sampling_frequency]?mode_names[info->mode]）;

	printf（“sblim=%d?jsbd=%d?ch=%d\n“
		fr_ps->sblimit?fr_ps->jsbound?fr_ps->stereo）;
}

void?*mem_alloc（unsigned?long?block?char?*item）
{
	void?*ptr;
	ptr?=?（void?*）malloc（（unsigned?long）block）;
	if?（ptr?!=?NULL）
		memset（ptr?0?block）;
	else{
		printf（“Unable?to?allocate?%s\n“?item）;
		exit（0）;
	}
	return?ptr;
}

/*open?and?initialize?the?buffer;?*/
void?alloc_buffer（Bit_stream_struc?*bs?int?size）
{
	bs->buf?=?（unsigned?char?*）?mem_alloc（size*sizeof（unsigned?char）?“buffer“）;
	bs->buf_size?=?size;
}

void?desalloc_buffer（Bit_stream_struc?*bs）
{
	free（bs->buf）;
}

/*?open?the?device?to?read?the?bit?stream?from?it?*/
void?open_bit_stream_r（Bit_stream_struc?*bs?char?*bs_filenam?int?size）
{
	register?unsigned?char?flag?=?1;

	if?（（bs->pt?=?fopen（bs_filenam?“rb“））?==?NULL）?{
		printf（“Could?not?find?\“%s\“.\n“?bs_filenam）;
		exit（1）;
	}

	bs->format?=?BINARY;
	alloc_buffer（bs?size）;
	bs->buf_byte_idx=0;
	bs->buf_bit_idx=0;
	bs->totbit=0;
	bs->mode?=?READ_MODE;
	bs->eob?=?FALSE;
	bs->eobs?=?FALSE;
}

void?close_bit_stream_r（Bit_stream_struc?*bs）
{
	fclose（bs->pt）;
	desalloc_buffer（bs）;
}

/*return?the?status?of?the?bit?stream*/
/*?returns?1?if?end?of?bit?stream?was?reached?*/
/*?returns?0?if?end?of?bit?stream?was?not?reached?*/
int?end_bs（Bit_stream_struc?*bs）
{
??return（bs->eobs）;
}


/*return?the?current?bit?stream?length?（in?bits）*/
unsigned?long?sstell（Bit_stream_struc?*bs）
{
??return（bs->totbit）;
}


void?refill_buffer（Bit_stream_struc?*bs）
{
	register?int?i=bs->buf_size-2-bs->buf_byte_idx;
	register?unsigned?long?n=1;

	while?（（i>=0）?&&?（!bs->eob））?{
			n=fread（&bs->buf[

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2011-11-03?20:30??MP3\
?????目錄???????????0??2011-11-24?21:08??MP3\mp3code\
?????目錄???????????0??2011-11-24?20:08??MP3\mp3code\Debug\
?????文件???????29381??2011-11-24?20:07??MP3\mp3code\Debug\common.obj
?????文件??????114039??2011-11-24?20:08??MP3\mp3code\Debug\decode.obj
?????文件???????23221??2011-11-24?20:08??MP3\mp3code\Debug\huffman.obj
?????文件???????23574??2011-11-24?20:25??MP3\mp3code\Debug\layer3.obj
?????文件???????32277??2011-11-24?20:08??MP3\mp3code\Debug\mp3code.map
?????文件??????292886??2011-11-24?20:08??MP3\mp3code\Debug\mp3code.out
?????文件?????????248??2011-11-24?20:25??MP3\mp3code\Debug.lkf
?????文件????????1810??2011-11-24?20:08??MP3\mp3code\cc_build_Debug.log
?????文件????????7463??1999-01-28?13:27??MP3\mp3code\common.c
?????文件????????4036??1999-01-28?13:59??MP3\mp3code\common.h
?????文件???????29640??2011-11-24?20:09??MP3\mp3code\decode.c
?????文件????????1673??2011-11-24?20:25??MP3\mp3code\decode.h
?????文件????????6006??1999-01-28?09:20??MP3\mp3code\huffman.c
?????文件????????2089??1999-01-28?09:19??MP3\mp3code\huffman.h
?????文件????????5394??2011-11-24?21:08??MP3\mp3code\layer3.c
?????目錄???????????0??2011-11-24?20:07??MP3\mp3code\mp3code.CS_\
?????文件????????3072??2011-11-24?20:07??MP3\mp3code\mp3code.CS_\FILE.CDX
?????文件????????2556??2011-11-24?21:08??MP3\mp3code\mp3code.CS_\FILE.DBF
?????文件????????4378??2011-11-24?20:07??MP3\mp3code\mp3code.CS_\FILE.FPT
?????文件??????346624??2011-11-24?21:08??MP3\mp3code\mp3code.CS_\SYMBOL.CDX
?????文件??????275289??2011-11-24?21:08??MP3\mp3code\mp3code.CS_\SYMBOL.DBF
?????文件??????571346??2011-11-24?21:08??MP3\mp3code\mp3code.CS_\SYMBOL.FPT
?????文件?????????759??2011-11-24?19:00??MP3\mp3code\mp3code.cmd
?????文件????????3536??2011-11-24?21:26??MP3\mp3code\mp3code.paf2
?????文件????????1177??2011-11-24?16:15??MP3\mp3code\mp3code.pjt
?????文件???????12620??2011-11-24?21:26??MP3\mp3code\mp3code.sbl