139 lines
3.1 KiB
C++
139 lines
3.1 KiB
C++
#include "ClassData.h"
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class FSUReader{
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public:
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FSUReader(std::string fileName, unsigned short numCh);
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~FSUReader();
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void ScanNumBlock();
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int ReadNextBlock(bool fast = false, int verbose = 0);
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int ReadBlock(unsigned int ID, int verbose = 0);
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unsigned long GetTotNumBlock() const{ return totNumBlock;}
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Data * GetData() const{return data;}
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private:
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FILE * inFile;
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Data * data;
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unsigned long inFileSize;
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unsigned int filePos;
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unsigned long totNumBlock;
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unsigned int blockID;
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std::vector<unsigned int> blockPos;
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unsigned int word[1]; /// 4 byte
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size_t dummy;
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char * buffer;
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};
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inline FSUReader::FSUReader(std::string fileName, unsigned short numCh){
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inFile = fopen(fileName.c_str(), "r");
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if( inFile == NULL ){
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printf("Cannot open file : %s \n", fileName.c_str());
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return;
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}
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fseek(inFile, 0L, SEEK_END);
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inFileSize = ftell(inFile);
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printf("%s | file size : %ld Byte = %.2f MB\n", fileName.c_str() , inFileSize, inFileSize/1024./1024.);
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fseek(inFile, 0L, SEEK_SET);
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filePos = 0;
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data = new Data(numCh);
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totNumBlock = 0;
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blockID = 0;
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blockPos.clear();
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//ScanNumBlock();
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}
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inline FSUReader::~FSUReader(){
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delete data;
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}
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inline int FSUReader::ReadNextBlock(bool fast, int verbose){
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if( inFile == NULL ) return -1;
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if( feof(inFile) ) return -1;
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if( filePos >= inFileSize) return -1;
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dummy = fread(word, 4, 1, inFile);
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if( dummy != 1) {
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printf("fread error, should read 4 bytes, but read %ld x 4 byte, file pos: %ld byte\n", dummy, ftell(inFile));
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return -10;
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}
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fseek(inFile, -4, SEEK_CUR);
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short header = ((word[0] >> 28 ) & 0xF);
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if( header != 0xA ) {
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printf("incorrect header.\n trminate.");
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return -20;
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}
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unsigned int aggSize = (word[0] & 0x0FFFFFFF) * 4; ///byte
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buffer = new char[aggSize];
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dummy = fread(buffer, aggSize, 1, inFile);
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filePos = ftell(inFile);
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if( dummy != 1) {
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printf("fread error, should read %d bytes, but read %ld x %d byte, file pos: %ld byte \n", aggSize, dummy, aggSize, ftell(inFile));
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return -30;
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}
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data->DecodeBuffer(buffer, aggSize, fast, verbose); // data will own the buffer
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data->ClearBuffer(); // this will clear the buffer.
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return 0;
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}
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inline int FSUReader::ReadBlock(unsigned int ID, int verbose){
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if( totNumBlock == 0 )return -1;
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if( ID >= totNumBlock )return -1;
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data->ClearData();
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fseek( inFile, 0L, SEEK_SET);
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if( verbose ) printf("Block index: %u, File Pos: %u byte\n", ID, blockPos[ID]);
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fseek(inFile, blockPos[ID], SEEK_CUR);
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filePos = blockPos[ID];
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blockID = ID;
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return ReadNextBlock(verbose);
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}
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inline void FSUReader::ScanNumBlock(){
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if( feof(inFile) ) return;
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blockID = 0;
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blockPos.push_back(0);
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data->ClearData();
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fseek(inFile, 0L, SEEK_SET);
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filePos = 0;
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while( ReadNextBlock(true) == 0 ){
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blockPos.push_back(filePos);
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blockID ++;
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printf("%u, %.2f%% %u/%lu\n\033[A\r", blockID, filePos*100./inFileSize, filePos, inFileSize);
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}
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totNumBlock = blockID;
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printf("\nScan complete: number of data Block : %lu\n", totNumBlock);
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rewind(inFile);
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blockID = 0;
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filePos = 0;
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} |