嗨，我正在处理一个关于处理声音的应用程序。 但是有一个问题“终止叫做抛出异常”
我已经设置了一个断点（所有例外）以查看出现了什么问题 结果证明是 “this-＆gt; buffer = new char [this-＆gt; data_size];”
这是我的代码
wave_file.mm
"#include "wave_file.h"
#define LITTLE 1;
//#define DEBUG
//const int i = 1;
//#define isBigEndian() ( (*(char*)&i) == 0 )
wave_file::wave_file(){
opened = false;
data_size = 0;
}
void wave_file::open(string file_name){
this->f.open(file_name,ios::binary);
opened=this->f.is_open();
opened = true;
if(!opened){
#ifdef DEBUG
cout<<"file open fail"<<endl;
#endif
return;
}
#ifdef DEBUG
cout<<"file open success"<<endl;
#endif
this->f.seekg(0,ios::end);
this->data_size=(int)this->f.tellg();
this->f.seekg(0,ios::beg);
this->buffer = new char[this->data_size];
int i;
for(i=0;i<this->data_size;i++)
buffer[i]=this->f.get();
f.close();
#ifdef DEBUG
cout<<"file read size is ";
if(i==this->data_size)
cout<<"right i is "<<i<<endl;
else
cout<<"false file size tellg is"<<this->data_size<<" i is "<<i<<endl;
#endif
}
bool wave_file::is_open(){
return this->opened;
}
bool wave_file::is_legal_wave_file()//¨Oß_¨∞WAVEÆʶ°
{
///////////////////////////¨∞∂}¿…Æ◊´h¶^∂« false
if(!this->opened)
return false;
///////////////////////////∂}©lßP¬_
//////////≠∫•˝ßP¬_¨Oß_¨∞RIFFÆʶ°
string temp;
int i;
char c;
for(i=0;i<4&&i<this->data_size;i++)
{
c=this->buffer[i];
temp=temp+c;
}
#ifdef DEBUG
cout<<temp<<endl;
if(temp=="RIFF")
cout<<"equal to RIFF type ok!!"<<endl;
else
cout<<"not equal to RIFF"<<endl;
#endif
if(!(temp=="RIFF"))
return false;
////////±µµ€ßP¬_¨Oß_¨∞WAVE fma
temp="";
for(i=0;i<4&&(i+8)<this->data_size;i++)
{
c=this->buffer[i+8];
temp=temp+c;
}
#ifdef DEBUG
cout<<temp<<endl;
if(temp=="WAVE")
cout<<"equal to WAVE type ok!!"<<endl;
else
cout<<"not equal to WAVE"<<endl;
#endif
if(temp=="WAVE")
return true;
else
return false;
}
int wave_file::read_data(int offset,int bytes,endia e)//±qoffset∂}©l≈™n≠”bytes•Œ ´¸©w™∫endia™∫§Ë¶°¶s§Jint§§
{
int temp;
int i;
char *c;
c=(char*)&temp;
if(e==littlendia)
{
temp=0;
for(i=0;i<bytes&&i<4;i++)
c[i]=this->buffer[offset+i];
#ifdef DEBUG
cout<<"LITTLE endia string "<<c<<" is int "<<temp<<endl;
#endif
}
else
{
temp=this->buffer[offset];
for(i=1;i<bytes&&i<4;i++)
temp=(temp<<8)+this->buffer[offset+i];
#ifdef DEBUG
cout<<"BIG endia string "<<c<<" is int"<<temp<<endl;
#endif
}
return temp;
}
short wave_file::read_short_data(int offset,endia e)//±qoffset∂}©l≈™2bytes•Œ´¸©w™∫endia™∫§Ë¶°¶s§Jint§§
{
short answer;
char front,behind;
char *temp;
temp=(char*)&answer;
behind=this->buffer[offset];
front=this->buffer[offset+1];
if(e==littlendia)
{
temp[0]=behind;
temp[1]=front;
}
else
{
temp[1]=behind;
temp[0]=front;
}
return answer;
}
int wave_file::find_chunk(int offset,string chunk_name)//±qoffset∂}©l߉≤≈¶X¶W¶r™∫chunk¶^∂«®‰offset¶p™G•¢±—¶^∂«-1
{
int i=offset;
int j;
string temp;
char c;
bool is_find =false;
while((!is_find)&&i<this->data_size)
{
temp="";
for(j=0;j<4;j++)
{
c=this->buffer[i+j];
temp=temp+c;
}
#ifdef DEBUG
cout<<temp<<endl;
#endif
if(chunk_name==temp)
is_find=true;
else
{
i+=4;
j=this->read_data(i,4,littlendia);
i=i+j+4;
}
}
if(is_find)
return i;
else
return -1;
}
和viewcontroller.mm
的一部分#import "ViewController.h"
#import <iostream>
#import <fstream>
#import <vector>
using namespace std;
#include"wave_file.h"
#include"chunk_fmt.h"
#include"chunk_data.h"
#include"contrast.h"
#define FILE_NAME "test.wav"
#define PERIOD_BLOCK 350 ///SAMPLE BLOCK
#define SLIDE_QUANTITATIVE 125 ///SAMPLE BLOCK
#define RANGE_OF_COMPARE 4
#define PERSENT 15
#define RANGE 2
//#define DEBUG
//#define SLIDED
//#define OUTPUT_SAMPLE_TO_FILE
#define OUTPUT_SAMPLE_FILE_NAME "tt.txt"
#define OUTPUT_RESULT_TO_FILE
#define OUTPUT_RESULT_FILE_NAME "r.txt"
void normalize(result *r,int range);
bool fix(int data,int average,int persent);
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
wave_file f;
int i,j;
bool flag = false;
f.open(FILE_NAME);
if(flag==false)
{
if(!f.is_legal_wave_file())
{
cout<<"not a wave file"<<endl;
cin>>i;
flag=true;
}
chunk_fmt cf;
cf.parser(f);
chunk_data cd;
cd.parser(f,cf);
if(flag==false)
{
if(!cd.is_parser())
{
cout<<"data not read in...."<<endl;
cin>>i;
flag=true;
}
}
contrast ct;
ct.load_data(cd.copy(),cd.get_size());
cout<<"load data to contrast"<<endl;
result *rt;
#ifdef SLIDED
cout<<"corrlation with slided"<<endl;
rt=ct.multiply_with_assign_slide(PERIOD_BLOCK,SLIDE_QUANTITATIVE);
#else
cout<<"corrlation without slided"<<endl;
rt=ct.multiply(PERIOD_BLOCK);
#endif
// normalize(rt,RANGE);
cout<<"now output result...."<<endl;
#ifdef OUTPUT_SAMPLE_TO_FILE
vector<short*>*k;
k=cd.copy();
ofstream of;
of.open(OUTPUT_SAMPLE_FILE_NAME);
for(i=0;i<cd.get_size();i++)
{
for(j=0;j<cf.num_of_chan();j++)
of<<(*k)[j][i]<<'\t';
of<<endl;
}
of.close();
#endif
#ifdef OUTPUT_RESULT_TO_FILE
ofstream ofr;
ofr.open(OUTPUT_RESULT_FILE_NAME);
for(i=0;i<rt->result_item_number;i++)
{
ofr<<i<<'\t';
for(j=0;j<(int)(rt->period_result)->size();j++)
ofr<<(*(rt->period_result))[j][i]<<'\t';
ofr<<endl;
}
ofr.close();
#endif
cin>>i;
flag=true;
}
}
chunck_data.cpp处理数据
#include "chunk_data.h"
//#define DEBUG
#define LITTLE 1
#define IN_WAVE_CHUNK 12
chunk_data::chunk_data()
{
this->is_success=false;
this->num_of_bytes_per_sample=0;
this->num_of_channel=0;
this->num_of_sample_per_channel=0;
}
void chunk_data::parser(wave_file &f,chunk_fmt &cf)
{
this->num_of_bytes_per_sample=cf.block_a()/cf.num_of_chan();
this->num_of_channel=cf.num_of_chan();
int data_size;
int offset;
offset=f.find_chunk(IN_WAVE_CHUNK,"data");
if(offset<0)
{
#ifdef DEBUG
cout<<"can not find the data chunk"<<endl;
#endif
return;
}
data_size=f.read_data(offset+4,4,littlendia);
this->num_of_sample_per_channel=data_size/cf.block_a();
#ifdef DEBUG
cout<<"data size is "<<data_size<<" bytes"<<endl;
cout<<"num_of_sample_per_channel "<<this->num_of_sample_per_channel<<endl;
cout<<"num of channel is "<<this->num_of_channel<<endl;
#endif
int i,j;
offset+=8;
for(i=0;i<this->num_of_channel;i++)
this->channel.push_back(new short[this->num_of_sample_per_channel]);
for(i=0;i<this->num_of_sample_per_channel;i++)
for(j=0;j<this->num_of_channel;j++)
this->channel[j][i]=f.read_short_data(offset+(i*this->num_of_channel+j)*2,littlendia);
this->is_success=cf.is_parser();
}