自己封装的PCM写成WAV文件 欢迎指点

#pragma oncetypedef struct{unsigned short int channels;unsigned long samplespersec;unsigned short int nBitsPerSamples; }WAVPARAMETER;//wav头的结构如下所示：  typedef struct{char fccID[4];unsigned long dwSize;char fccType[4];}HEADER;typedef struct{char fmt[4];//'fmt'unsigned   long       dwSize;//0x10;   sizeof(PCMWAVEFORMAT)unsigned   short     wFormatTag;//音频数据编码方式 1PCM 1（WAVE_FORMAT_PCM）;  格式类别，1表示为PCM形式的声音数据unsigned   short     wChannels;//通道数unsigned   long       dwSamplesPerSec;//采样率 每秒样本数unsigned   long       dwAvgBytesPerSec;//音频数据传送速率,单位是字节,值为采样率x每次采样大小. 每秒数据量//每秒数据量 value = channels*nBitsPerSecond*nBitsPerSamples>>3;unsigned   short     wBlockAlign;//数据块调整数 value = channels*nBitsPerSamples>>3;unsigned   short     uiBitsPerSample;//每样本数据位数 每个声道的精度.如:16bit 在这里就是16.多声道,则每个声道的精度大小都是一样的.}FMT;typedef struct{char data[4];unsigned long dwSize;}DATA;class CWavFile{public:CWavFile(void);~CWavFile(void);public:void SetOutputFile(const char *);void SetInputFile(const char *);void WriteData(unsigned char *,int);void SetParameter(unsigned short int,unsigned long,unsigned short int);void StartRecordWav();void FinishedRecordWav();private:void WriteHeader();void InitData();private:int m_data_length;WAVPARAMETER m_wav_parameter;FILE *m_pFile;const char *m_pOutPutFile;const char *m_pInputFile;private:HEADER m_header;FMT m_fmt;DATA m_data;};

#include "StdAfx.h"#include "WavFile.h"CWavFile::CWavFile(void){memcpy(m_header.fccID,"RIFF",4);memcpy(m_header.fccType,"WAVE",4);memcpy(m_fmt.fmt,"fmt ",4);memcpy(m_data.data,"data",4);InitData();}CWavFile::~CWavFile(void){}void CWavFile::SetOutputFile(const char *ofile){m_pOutPutFile = ofile;}void CWavFile::SetInputFile(const char *ifile){m_pInputFile = ifile;}void CWavFile::SetParameter(unsigned short int channels,unsigned long samplespersec,unsigned short int nBitsPerSamples){m_wav_parameter.channels = channels;m_wav_parameter.samplespersec = samplespersec;m_wav_parameter.nBitsPerSamples = nBitsPerSamples;}void CWavFile::StartRecordWav(){m_pFile = fopen(m_pOutPutFile,"wb");if(NULL == m_pFile)return;WriteHeader();}void CWavFile::WriteData(unsigned char * data,int len){fwrite(data,sizeof(unsigned char),len,m_pFile);m_data_length += sizeof(unsigned char)*len;m_data.dwSize += sizeof(unsigned char)*len;}void CWavFile::WriteHeader(){//跳过HEADERfseek(m_pFile,sizeof(HEADER),SEEK_CUR);//写入FMTm_fmt.wChannels = m_wav_parameter.channels;m_fmt.wFormatTag = 1;m_fmt.dwSize = 0x10;m_fmt.dwSamplesPerSec = m_wav_parameter.samplespersec / m_fmt.wChannels;m_fmt.uiBitsPerSample = m_wav_parameter.nBitsPerSamples;m_fmt.wBlockAlign = m_fmt.wChannels * m_fmt.uiBitsPerSample >> 3;m_fmt.dwAvgBytesPerSec = m_fmt.dwSamplesPerSec * m_fmt.wBlockAlign;fwrite(&m_fmt,sizeof(FMT),1,m_pFile);//跳过DATAfseek(m_pFile,sizeof(DATA),SEEK_CUR);}void CWavFile::FinishedRecordWav(){rewind(m_pFile);m_header.dwSize = 44 + m_data.dwSize;fwrite(&m_header,1,sizeof(HEADER),m_pFile);fseek(m_pFile,sizeof(FMT),SEEK_CUR);fwrite(&m_data,1,sizeof(DATA),m_pFile);fclose(m_pFile);InitData();}void CWavFile::InitData(){m_fmt.dwSize = 0;m_data_length = 0;m_data.dwSize = 0;m_header.dwSize = 0;m_pInputFile = NULL;m_pOutPutFile = NULL;}