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clADX.cpp
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//--------------------------------------------------
// インクルード
//--------------------------------------------------
#include "clADX.h"
#include <stdio.h>
#include <memory.h>
//--------------------------------------------------
// インライン関数
//--------------------------------------------------
inline short bswap(short v){short r=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;return r;}
inline unsigned short bswap(unsigned short v){unsigned short r=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;return r;}
inline int bswap(int v){int r=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;return r;}
inline unsigned int bswap(unsigned int v){unsigned int r=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;return r;}
inline long long bswap(long long v){long long r=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;return r;}
inline unsigned long long bswap(unsigned long long v){unsigned long long r=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;r<<=8;v>>=8;r|=v&0xFF;return r;}
inline float bswap(float v){unsigned int i=bswap(*(unsigned int *)&v);return *(float *)&i;}
//--------------------------------------------------
// コンストラクタ
//--------------------------------------------------
clADX::clADX():_data(NULL){
memset(&_header,0,sizeof(_header));
}
//--------------------------------------------------
// デストラクタ
//--------------------------------------------------
clADX::~clADX(){
if(_data){
delete [] _data;
_data=NULL;
}
}
//--------------------------------------------------
// ADXチェック
//--------------------------------------------------
bool clADX::CheckFile(void *data){
return (data&&*(unsigned short *)data==0x0080);
}
//--------------------------------------------------
// デコード
//--------------------------------------------------
bool clADX::Decode(const char *filename,const char *filenameWAV){
// チェック
if(!(filename&&filenameWAV))return false;
// 開く
FILE *fp,*fp2;
if(fopen_s(&fp,filename,"rb"))return false;
if(fopen_s(&fp2,filenameWAV,"wb")){fclose(fp);return false;}
//
fread(&_header,sizeof(_header),1,fp);
if(!Decode(fp2,&_header,sizeof(_header),0)){fclose(fp2);fclose(fp);return false;}
//
unsigned int size=18*_header.channelCount;
unsigned char *data=new unsigned char [size];
if(!data){fclose(fp2);fclose(fp);return false;}
fseek(fp,_header.dataOffset,SEEK_SET);
while(_header.sampleCount){
fread(data,size,1,fp);
if(!Decode(fp2,data,size,_header.dataOffset)){
delete [] data;
fclose(fp2);
fclose(fp);
return false;
}
}
delete [] data;
// 閉じる
fclose(fp);
fclose(fp2);
return true;
}
//--------------------------------------------------
// デコード
//--------------------------------------------------
bool clADX::Decode(FILE *fp,void *data,int size,unsigned int address){
// チェック
if(!(fp&&data))return false;
// ヘッダ
if(address==0){
if(size<sizeof(_header))return false;
// ヘッダを取得
memcpy(&_header,data,sizeof(_header));
if(!CheckFile(&_header))return false;
//_header.signature=bswap(_header.signature);
_header.dataOffset=bswap(_header.dataOffset)+4;
_header.samplingRate=bswap(_header.samplingRate);
_header.sampleCount=bswap(_header.sampleCount);
// WAVEヘッダを書き込み
struct stWAVEHeader{
char riff[4];
unsigned int riffSize;
char wave[4];
char fmt[4];
unsigned int fmtSize;
unsigned short fmtType;
unsigned short fmtChannelCount;
unsigned int fmtSamplingRate;
unsigned int fmtSamplesPerSec;
unsigned short fmtSamplingSize;
unsigned short fmtBitCount;
char data[4];
unsigned int dataSize;
}wav={'R','I','F','F',0,'W','A','V','E','f','m','t',' ',0x10,1,0,0,0,0,16,'d','a','t','a',0};
wav.fmtChannelCount=_header.channelCount;
wav.fmtSamplingRate=_header.samplingRate;
wav.fmtSamplingSize=2*wav.fmtChannelCount;
wav.fmtSamplesPerSec=wav.fmtSamplingRate*wav.fmtSamplingSize;
wav.dataSize=_header.sampleCount*wav.fmtSamplingSize;
wav.riffSize=wav.dataSize+0x24;
fwrite(&wav,sizeof(wav),1,fp);
//
if(_data)delete [] _data;
_data=new int [32*_header.channelCount];
if(!_data)return false;
memset(_data,0,sizeof(int)*32*_header.channelCount);
}
// データ
else if(address>=_header.dataOffset&&_data){
for(unsigned char *s=(unsigned char *)data,*e=s+size-18*_header.channelCount;s<=e;){
int *d=_data;
for(unsigned int i=_header.channelCount;i>0;i--,d+=32,s+=18){
Decode(d,s);
}
d=_data;
for(int i=32;i>0&&_header.sampleCount;i--,d++,_header.sampleCount--){
for(unsigned int j=0;j<_header.channelCount;j++){
int v=d[j*32];
if(v>0x7FFF)v=0x7FFF;
else if(v<-0x8000)v=-0x8000;
fwrite(&v,2,1,fp);
}
}
}
}
else{
return false;
}
return true;
}
//--------------------------------------------------
// デコード ※検証中
//--------------------------------------------------
void clADX::Decode(int *d,unsigned char *s){
int scale=bswap(*(unsigned short *)s);s+=2;
int v,p=d[31],pp=d[30];
for(int i=16;i>0;i--,s++){
v=*s>>4;if(v&8)v-=16;
v=(v*scale*0x4000+p*0x7298-pp*0x3350)>>14;
pp=p;p=v;*(d++)=v;
v=*s&0xF;if(v&8)v-=16;
v=(v*scale*0x4000+p*0x7298-pp*0x3350)>>14;
pp=p;p=v;*(d++)=v;
}
}