消息可以保存已录好数据.
2.根据用户的声音强弱动态显示声音波形;
这主要通过GDI函数来实现.
3.将用户通过麦克风发出的声音录制成wav文件保存.
这将利用到Multimedia file I/O APIs.
a．调用mminoOpen函数来打开WAVE文件,获取HMMIO类型的文件句柄;
b．根据WAVE文件的结构,调用mmioRead、mmioWrite和mmioSeek函数实现文件的读、写和定位操作;
c．调用mmioClose函数来关闭WAVE文件.
7.麦克录音系统的实现(MicDemo)
下面是该系统的界面:
对于录音来说最重要的就是CSoundIn类,下面就是该类的定义:
namespace perdubug { // prevent the name-space pollution
class CSoundIn
{
public:
BOOL __initMic(); // get the best wave format supported by your sound card
// and then i will use the format to capture sound.
void __closeMic();
BOOL __openMic(); // open device and begin to capture with the best format(when
// invoke __initMic function then you will get the best format
// supported by host's sound card
//
// if your want to capture sound and export into a wav file please invoke this function
// to tell me the full path then i will create the wav file.
//
void __createOutputWaveFile(const TCHAR * lpszFileName);
// if you invoke any member function return error/false please
// use this function to get the result...
DWORD __getLastError();
//
// when the capture buffer is filled please invoke this function to 'add buffer'(Actually
// you should create two-circular buffers,when 1st buffer is filled then switch to 2st,1st
// buffer will be wrote into wav file.
//
void AddBuffer();
virtual ~CSoundIn();
friend CSoundIn & theSoundCapture();
private:
BOOL GetBestWaveFormat(WAVEFORMATEX & waveFormatEx);
// because sound card is one and only so i must limit the number of CSoundIn object,
// but how to limit the class object nums?maybe put constructor into private scope is
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