VC++初步实现保存数据为音频WAV文件

曾经终败给现在 2023-01-01 03:41 212阅读 0赞

先行基本知识见此

[https://blog.csdn.net/bcbobo21cn/article/details/109087252][https_blog.csdn.net_bcbobo21cn_article_details_109087252]

win7, vc6；新建一个对话框工程；添加一个文本框；为文本框添加一个对话框类的成员变量；文本框用来输入一些数据；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70][]

对话框cpp文件头部加入；

\#include<mmsystem.h>  
\#include<mmreg.h>

......

/\*  
typedef struct\{  
      WORD  wFormatTag;   
      WORD nChannels;   
      DWORD nSamplesPerSec;   
      DWORD nAvgBytesPerSec;  
      WORD  nBlockAlign;   
      WORD wBitsPerSample;   
      WORD  cbSize; \} WAVEFORMATEX;

typedef struct \{  
    LPSTR lpData;   
    DWORD dwBufferLength;   
    DWORD dwBytesRecorded;   
    DWORD dwUser;   
    DWORD dwFlags;   
    DWORD dwLoops;   
    struct wavehdr\_tag \* lpNext;   
    DWORD reserved; \} WAVEHDR;   
    \*/

这两个结构体不用自己定义；包含前面两个头文件就有了；

\#pragma  comment(lib, "winmm.lib")，引入音频操作库；

WAVEFORMATEX waveform; 定义格式结构体变量；

添加一个按钮；按钮处理代码如下；

void CWavtestDlg::OnButton1() 
    {
    	// TODO: Add your control notification handler code here
    	DWORD dwDataLength = 50;
    	CFile m_file;
    	CFileException fileException;
    	CString m_csFileName= "S:\\testaudio.wav";//保存路径
    	m_file.Open(m_csFileName,CFile::modeCreate|CFile::modeReadWrite, &fileException);
    	DWORD m_WaveHeaderSize = 38;
    	DWORD m_WaveFormatSize = 18;
    	m_file.SeekToBegin();
    	m_file.Write("RIFF",4);
    	//unsigned int Sec=(sizeof pSaveBuffer + m_WaveHeaderSize);
    	unsigned int Sec=(50 + m_WaveHeaderSize);
    	m_file.Write(&Sec,sizeof(Sec));
    	m_file.Write("WAVE",4);
    	m_file.Write("fmt ",4);
    	m_file.Write(&m_WaveFormatSize,sizeof(m_WaveFormatSize));
    	m_file.Write(&waveform.wFormatTag,sizeof(waveform.wFormatTag));
    	m_file.Write(&waveform.nChannels,sizeof(waveform.nChannels));
    	m_file.Write(&waveform.nSamplesPerSec,sizeof(waveform.nSamplesPerSec));
    	m_file.Write(&waveform.nAvgBytesPerSec,sizeof(waveform.nAvgBytesPerSec));
    	m_file.Write(&waveform.nBlockAlign,sizeof(waveform.nBlockAlign));
    	m_file.Write(&waveform.wBitsPerSample,sizeof(waveform.wBitsPerSample));
    	m_file.Write(&waveform.cbSize,sizeof(waveform.cbSize));
    	m_file.Write("data",4);
    	m_file.Write(&dwDataLength,sizeof(dwDataLength));
    
    	UpdateData(TRUE);
    	char* pchar=new char[100];
        pchar=m_wavdata.GetBuffer(m_wavdata.GetLength());
        m_file.Write(pchar,dwDataLength);
    	
    	m_file.Seek(dwDataLength,CFile::begin);
    	m_file.Close();
    }

UpdateData(TRUE);  
char\* pchar=new char\[100\];  
pchar=m\_wavdata.GetBuffer(m\_wavdata.GetLength());  
m\_file.Write(pchar,dwDataLength);

获取文本框数据，转换为char \*类型，通过调用CString的GetBuffer函数；因为文件的Write函数的第一个参数是void \* 类型，char \* 可直接写入；

运行程序；输入一堆111...；点保存按钮；看下能不能把输入的数据保存为音频wav文件；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 1][]

保存以后，磁盘上出来一个wav文件；

![20201231034257832.png][]

但是不能播放；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 2][]

可能保存的格式，什么地方不对；

先大体看一下；

m\_file.Write("RIFF",4);   文件中先写入"RIFF"四个字符，没错，头四个字节是固定的，文件标识符；  
    //unsigned int Sec=(sizeof pSaveBuffer + m\_WaveHeaderSize);  
    unsigned int Sec=(50 + m\_WaveHeaderSize);  
    m\_file.Write(&Sec,sizeof(Sec));   然后写入一个4字节，是一个尺寸（长度）值，可能是数据加文件头部的长度；  
    m\_file.Write("WAVE",4);  然后写入"WAVE"四个字符，没错；  
    m\_file.Write("fmt ",4);   然后写入"fmt "四个字节，感觉到这里可能有问题；

往下没时间细看了；先到此；

找到2个wave文件解析和编程详细些的资料，记一下先；

https://www.cnblogs.com/lidabo/p/3701959.html  
https://www.cnblogs.com/tocy/p/WAV\_file-format.html

[https_blog.csdn.net_bcbobo21cn_article_details_109087252]: https://blog.csdn.net/bcbobo21cn/article/details/109087252
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70]: /images/20221120/d1738ba358fd48eda770ddf4de37db4d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20201231034247156.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24=,size_16,color_FFFFFF,t_70
[20201231034257832.png]: https://img-blog.csdnimg.cn/20201231034257832.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20201231034309167.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24=,size_16,color_FFFFFF,t_70