Question

我在阅读WAVE文件时遇到问题。我目前正在使用本教程（http://rogerchansdigitalworld.blogspot.de/2010/05/how-to-read-wav-format-file-in-c.html）来深入了解这些内容。所以这是我的代码的一部分：

void loadWaveFile(char *fname, WavData *ret) {
FILE* fp = fopen(fname,"rb");

if (fp)  {
    char id[5];
    unsigned long size;
    short format_tag, channels, block_align, bits_per_sample;
    unsigned long format_length, sample_rate, avg_bytes_sec, data_size; 
    fread(id, sizeof(char),4,fp); 
    id[4] = '\0';

    if(!strcmp(id,"RIFF")) { 
        fread(&size, sizeof(unsigned long),1,fp); 
        fread(id, sizeof(char),4,fp); 
        id[4] = '\0';

        if(!strcmp(id,"WAVE")) { 

            fread(id,sizeof(char),4,fp); 
            fread(&format_length, sizeof(unsigned long),1,fp);
            fread(&format_tag, sizeof(short),1,fp);
            fread(&channels, sizeof(short),1,fp);
            fread(&sample_rate, sizeof(unsigned long),1,fp);
            fread(&avg_bytes_sec, sizeof(unsigned long),1,fp);
            fread(&block_align, sizeof(short),1,fp);
            fread(&bits_per_sample, sizeof(short),1,fp); 
            fread(id,sizeof(char),4,fp); 
            fread(&data_size, sizeof(unsigned long),1,fp); 

            ret->size = data_size/sizeof(short);
            ret->data =(short*) malloc(data_size);
            fread(ret->data, sizeof(short), ret->size,fp);

        }
        else {
            std::cout<<"Error: RIFF Datei, aber keine wave Datei\n";
        }
    }
    else {
        std::cout<<"Error: keine RIFF Datei\n";
    }
}
else {
    std::cout<<"Error: keine Datei ausgewaehlt\n";
}
fclose(fp);

与链接中显示的几乎相同。我的主要问题是第二个if语句。当我运行代码时，它会读取＆＃34; fmt＆＃34;而不是＆＃34; WAVE＆＃34;。好像它会跳过＆＃34; WAVE＆＃34;部分并直接跳入＆＃34; fmt＆＃34;部分。任何人都知道这里有什么问题吗？这里还详细描述了WAVE文件http://mathmatrix.narod.ru/Wavefmt.html

谢谢！

使用c ++读取.wav文件的问题

0 个答案: