c语言读取wav音频文件输出浮点内容

你可以通过以下步骤读取wav音频文件并输出浮点内容：

1. 打开wav文件并读取头信息

#include <stdio.h>
#include <stdlib.h>

typedef struct {
    char chunkID[4];
    unsigned int chunkSize;
    char format[4];
    char subchunk1ID[4];
    unsigned int subchunk1Size;
    unsigned short audioFormat;
    unsigned short numChannels;
    unsigned int sampleRate;
    unsigned int byteRate;
    unsigned short blockAlign;
    unsigned short bitsPerSample;
    char subchunk2ID[4];
    unsigned int subchunk2Size;
} WavHeader;

WavHeader readWavHeader(FILE *file) {
    WavHeader header;
    fread(&header, sizeof(header), 1, file);
    return header;
}

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

    WavHeader header = readWavHeader(file);

    printf("Sample rate: %d\n", header.sampleRate);

    fclose(file);
    return 0;
}

2. 读取音频数据并输出浮点内容

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

typedef struct {
    char chunkID[4];
    unsigned int chunkSize;
    char format[4];
    char subchunk1ID[4];
    unsigned int subchunk1Size;
    unsigned short audioFormat;
    unsigned short numChannels;
    unsigned int sampleRate;
    unsigned int byteRate;
    unsigned short blockAlign;
    unsigned short bitsPerSample;
    char subchunk2ID[4];
    unsigned int subchunk2Size;
} WavHeader;

WavHeader readWavHeader(FILE *file) {
    WavHeader header;
    fread(&header, sizeof(header), 1, file);
    return header;
}

int16_t readInt16(FILE *file) {
    int16_t value;
    fread(&value, sizeof(value), 1, file);
    return value;
}

float convertToFloat(int16_t value) {
    const float multiplier = 1.0f / 32768.0f;
    return value * multiplier;
}

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

    WavHeader header = readWavHeader(file);

    printf("Sample rate: %d\n", header.sampleRate);

    int numSamples = header.subchunk2Size / (header.numChannels * (header.bitsPerSample/8));
    printf("Num samples: %d\n", numSamples);

    for (int i = 0; i < numSamples; i++) {
        int16_t sample = readInt16(file);
        float value = convertToFloat(sample);
        printf("%f\n", value);
    }

    fclose(file);
    return 0;
}

这样就可以读取wav音频文件并输出浮点内容了。