WAV文件格式

1、文件格式

2、文件头结构体定义，共44字节

// WAVE file header format
typedef struct _WavHeader_s{
    MI_U8   riff[4];                // RIFF string
    MI_U32  ChunkSize;              // overall size of file in bytes
    MI_U8   wave[4];                // WAVE string
    MI_U8   fmt_chunk_marker[4];    // fmt string with trailing null char
    MI_U32  length_of_fmt;          // length of the format data
    MI_U16  format_type;            // format type. 1-PCM, 3- IEEE float, 6 - 8bit A law, 7 - 8bit mu law
    MI_U16  channels;               // no.of channels
    MI_U32  sample_rate;            // sampling rate (blocks per second)
    MI_U32  byterate;               // SampleRate * NumChannels * BitsPerSample/8
    MI_U16  block_align;            // NumChannels * BitsPerSample/8
    MI_U16  bits_per_sample;        // bits per sample, 8- 8bits, 16- 16 bits etc
    MI_U8   data_chunk_header [4];  // DATA string or FLLR string
    MI_U32  data_size;              // NumSamples * NumChannels * BitsPerSample/8 - size of the next chunk that will be read
}_WavHeader_t;

参考：https://www.jianshu.com/p/947528f3dff8