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用 pragma pack 命令修改对齐方式为按字节的对齐方式就对了。


#pragma pack(push,1) //改变当前的对齐方式为按字节的对齐方式

typedef struct waveformat_tag {
    WORD    wFormatTag;        /* format type */
    WORD    nChannels;         /* number of channels (i.e. mono, stereo, etc.) */
    DWORD   nSamplesPerSec;    /* sample rate */
    DWORD   nAvgBytesPerSec;   /* for buffer estimation */
    WORD    nBlockAlign;       /* block size of data */
} WAVEFORMAT, *PWAVEFORMAT, NEAR *NPWAVEFORMAT, FAR *LPWAVEFORMAT;

/* flags for wFormatTag field of WAVEFORMAT */
#define WAVE_FORMAT_PCM     1


/* specific waveform format structure for PCM data */
typedef struct pcmwaveformat_tag {
    WAVEFORMAT  wf;
    WORD        wBitsPerSample;
} PCMWAVEFORMAT, *PPCMWAVEFORMAT, NEAR *NPPCMWAVEFORMAT, FAR *LPPCMWAVEFORMAT;

#pragma pack(pop) //恢复原来的对齐方式

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