windows - 在 Windows 上使用 native C++ 读取 WAV 文件

Question

寻找一个简单的 Windows native 调用来在 Windows 上打开和读取 C++ 中的 WAV 文件(不需要第三方库)。

我能找到

mmio* 函数 - 已弃用。

媒体基础 - 似乎更复杂，因为它“...构建一个作为 COM 服务器的 DLL...”

但是所有这些都比从本地文件中读取字节复杂得多。

我可以自己编写解析WAV格式的代码，但宁愿使用已经运行和测试的东西，而不是我临时编写的东西。

是否存在允许我这样做的 Microsoft WAV 文件解析器/读取器；

打开文件；

检查标题；

读取 PCM 数据。

Answer 1

只需遵守 WAVE 文件格式就很容易，在此基础上，您可以逐字节提取数据并进行解释。因此，一旦您拥有文件的正确路径，您就可以执行以下操作:这是我在 Android 中的 wav 文件阅读器的一段代码(不完整，但具有从 wav 文件中读取 pcm 数据的主要部分及其描述符)

typedef struct wav_file {
    unsigned char chunkId[4];
    uint32_t chunkSize;
    unsigned char format[4];
    unsigned char subchunk1Id[4];
    uint32_t subchunk1Size;
    uint16_t audioFormat;
    uint16_t numChannels;
    uint32_t sampleRate;
    uint32_t byteRate;
    uint16_t blockAlign;
    uint16_t bitsPerSample;
    unsigned char subchunk2Id[4];
    uint32_t subchunk2Size;
    unsigned char * data;
} WavFile;    

void swap_endian16(uint16_t val) {
    val = (val<<8) | (val>>8);
}

void swap_endian32(uint32_t val) {
     val = (val<<24) | ((val<<8) & 0x00ff0000) |
      ((val>>8) & 0x0000ff00) | (val>>24);
}

WavError loadWavFile(char filePath[], WavFile * wavFile) {
    WavError rc = NO_ERROR;
    FILE *fp = fopen(filePath,"rb");
    printf("wavreader file Path = %s from %s", (fp ? "file opened" : "failed to open file"), filePath);
    if(!fp) {
        rc = CANNOT_OPEN_FILE_ERROR;
        goto out1;
    }

    //chunkId
    size_t len = fread(wavFile->chunkId, sizeof(unsigned char), 4, fp);
    wavFile->chunkId[len] = '\0';
    printf("wavreader len:%d chunkId: %s", (int) len , wavFile->chunkId);
    if (strcmp((const char *) wavFile->chunkId, "RIFF")) {
        rc = NOT_WAV_FILE_ERROR;
        goto out1;
    }

    //chunkSize
    fread(&wavFile->chunkSize, sizeof(uint32_t), 1, fp);
    swap_endian32(wavFile->chunkSize);
    printf("wavreader chunkSize: %d", wavFile->chunkSize);

    //format
    len = fread(wavFile->format, sizeof(unsigned char), 4, fp);
    wavFile->format[len] = '\0';
    printf("wavreader format: %s", wavFile->format);
    if (strcmp((const char *)wavFile->format,"WAVE")) {
       rc = FMT_ERROR;
       goto out1;
    }

    //subchunk1Id
    len = fread(wavFile->subchunk1Id, sizeof(unsigned char), 4, fp);
    wavFile->subchunk1Id[len] = '\0';
    printf("wavreader subchunk1Id: %s", wavFile->subchunk1Id);
    if (strcmp((const char *)wavFile->subchunk1Id,"fmt ")) {
        rc = FMT_ID_ERROR;
        goto out1;
    }

    //subchunk1Size
    fread(&wavFile->subchunk1Size, sizeof(uint32_t), 1, fp);
    swap_endian32(wavFile->subchunk1Size);
    printf("wavreader subchunk1Size: %d", wavFile->subchunk1Size);

    //audioFormat
    fread(&wavFile->audioFormat, sizeof(uint16_t), 1, fp);
    swap_endian16(wavFile->audioFormat);
    printf("wavreader audioFormat: %d", wavFile->audioFormat);

    //numChannels
    fread(&wavFile->numChannels, sizeof(uint16_t), 1, fp);
    swap_endian16(wavFile->numChannels);
    printf("wavreader numChannels: %d", wavFile->numChannels);

    //sampleRate
    fread(&wavFile->sampleRate, sizeof(uint32_t), 1, fp);
    swap_endian32(wavFile->sampleRate);
    printf("wavreader sampleRate: %d", wavFile->sampleRate);

    //byteRate
    fread(&wavFile->byteRate, sizeof(uint32_t), 1, fp);
    swap_endian32(wavFile->byteRate);
    printf("wavreader byteRate: %d", wavFile->byteRate);

    //blockAlign
    fread(&wavFile->blockAlign, sizeof(uint16_t), 1, fp);
    swap_endian16(wavFile->blockAlign);
    printf("wavreader blockAlign: %d", wavFile->blockAlign);

    //bitsPerSample
    fread(&wavFile->bitsPerSample, sizeof(uint16_t), 1, fp);
    swap_endian16(wavFile->bitsPerSample);
    printf("wavreader bitsPerSample: %d", wavFile->bitsPerSample);

    //subchunk2Id
    fread(wavFile->subchunk2Id, sizeof(unsigned char), 4, fp);
    wavFile->subchunk2Id[len] = '\0';
    printf("wavreader subchunk2Id: %s", wavFile->subchunk2Id);

    fread(&wavFile->subchunk2Size, sizeof(uint32_t), 1, fp);
    swap_endian32(wavFile->subchunk2Size);
    printf("wavreader subchunk2Size: %d", wavFile->subchunk2Size);

    wavFile->data = (unsigned char *) malloc (sizeof(unsigned char) * wavFile->subchunk2Size); //set aside sound buffer space
    fread(wavFile->data, sizeof(unsigned char), wavFile->subchunk2Size, fp); //read in our whole sound data chunk
    fclose(fp);
out1:
    return rc;
}

在 wavFile->data 中，您可以从文件中获取实际的 pcm 数据。
PS:你应该使用 this link作为引用