c语言读取wav音频文件输出浮点内容

您可以使用C语言中的标准库来读取WAV音频文件并输出浮点内容。首先，您需要打开WAV文件，然后读取其中的音频数据。WAV文件中的音频数据是通过采样的方式存储的，因此您需要使用采样率和采样位数来解析数据。下面是一些参考代码：

#include <stdio.h>
#include <stdint.h>

int main()
{
    FILE* wav_file = fopen("example.wav", "rb");
    if (!wav_file) {
        printf("Failed to open file\n");
        return -1;
    }

    uint16_t channels; // Number of channels (mono or stereo)
    uint32_t sample_rate; // Sample rate (samples per second)
    uint16_t bits_per_sample; // Number of bits per sample
    uint32_t data_size; // Size of the audio data chunk

    // Read the WAV file header
    fread(&channels, sizeof(uint16_t), 1, wav_file);
    fseek(wav_file, 22, SEEK_SET);
    fread(&sample_rate, sizeof(uint32_t), 1, wav_file);
    fseek(wav_file, 34, SEEK_SET);
    fread(&bits_per_sample, sizeof(uint16_t), 1, wav_file);
    fseek(wav_file, 40, SEEK_SET);
    fread(&data_size, sizeof(uint32_t), 1, wav_file);

    // Calculate some values needed for parsing the audio data
    uint32_t bytes_per_sample = bits_per_sample / 8;
    uint32_t num_samples = data_size / bytes_per_sample;
    uint32_t bytes_per_channel = bytes_per_sample * channels;

    // Read the audio data and convert it to floating-point values
    for (uint32_t i = 0; i < num_samples; i++) {
        int16_t sample_int16;
        float sample_float;

        fread(&sample_int16, sizeof(int16_t), 1, wav_file);

        // Convert the sample to a floating-point value in the range -1.0 to 1.0
        sample_float = ((float)sample_int16) / ((float)(1 << (bits_per_sample - 1)));
        printf("%f\n", sample_float);
    }

    fclose(wav_file);
    return 0;
}

这段代码会打开名为"example.wav"的文件并依次读取采样率、采样位数和音频数据。然后，它会将每个采样转换为浮点数并输出。请注意，这段代码假设WAV文件是单声道（mono）的，如果您的文件是双声道（stereo），您需要相应地调整代码。