wave header

/*wave 文件一共有四个Chunk组成，其中第三个Chunk可以省略，每个Chunk有标示（ID）,大小（size,就是本Chunk的内容部分长度）,内容三部分组成*//*------------------------------------------------|             RIFF WAVE Chunk                  ||             ID = 'RIFF'                     ||             RiffType = 'WAVE'                |------------------------------------------------|             Format Chunk                     ||             ID = 'fmt '                      |------------------------------------------------|             Fact Chunk(optional)             ||             ID = 'fact'                      |------------------------------------------------|             Data Chunk                       ||             ID = 'data'                      |------------------------------------------------*/typedef struct waveheader{    /****RIFF WAVE CHUNK*/    unsigned char a[4];//四个字节存放'R','I','F','F'    long int b;        //整个文件的长度-8;每个Chunk的size字段，都是表示除了本Chunk的ID和SIZE字段外的长度;    unsigned char c[4];//四个字节存放'W','A','V','E'    /****Format CHUNK*/    unsigned char d[4];//四个字节存放'f','m','t',''    long int e;       //16后没有附加消息，18后有附加消息；一般为16，其他格式转来的话为18    short int f;       //编码方式，一般为0x0001;    short int g;       //声道数目，1单声道，2双声道;    long int h;        //采样频率;    long int i;        //每秒所需字节数;    short int j;       //每个采样需要多少字节，若声道是双，则两个一起考虑;    short int k;       //即量化位数    /***Data Chunk**/        unsigned char p[4];//四个字节存放'd','a','t','a'    long int q;        //语音数据部分长度，不包括文件头的任何部分} waveheader;//定义WAVE文件的文件头结构体waveheader *get_waveheader(int bits, int rates, int channels, unsigned long size){        waveheader *header = malloc(sizeof(*header));    header->a[0] = 'R';    header->a[1] = 'I';    header->a[2] = 'F';    header->a[3] = 'F';    header->b = size - 8;    header->c[0] = 'W';    header->c[1] = 'A';    header->c[2] = 'V';    header->c[3] = 'E';    header->d[0] = 'f';    header->d[1] = 'm';    header->d[2] = 't';    header->d[3] = ' ';    header->e = 16;    header->f = 1;    header->g = channels;    header->h = rates;    header->i = size / (rates * channels * bits / 8);    header->j = channels * bits / 8;    header->k = bits;    header->p[0] = 'd';    header->p[1] = 'a';    header->p[2] = 't';    header->p[3] = 'a';    header->q = size;        return header;}