wav

主要功能如下

• 提供函数生成wav头
• 提供命令行工具，把pcm音频转成wav格式

参考资料

https://stackoverflow.com/questions/21131595/convert-from-pcm-to-wav-is-it-possible
https://blog.csdn.net/u010011236/article/details/53026127

安装pcm2wav工具

env GOPATH=`pwd` go get github.com/guonaihong/wav/pcm2wav

使用pcm2wav

-ar 指定采样率, -f 指定输入pcm音频 -w 输出wav音频文件名

./pcm2wav -ar 16000 -f ./good.pcm -w good.wav

wav.go

//生成wav结构体 
func New(numChannels uint16, sampleRate uint32, bitsPerSample uint16, wavLen uint32) *WavHead

// 把wav结构体序列化成二进制对象
func (wh *WavHead) Marshal() ([]byte, error)

示例内容(pcm2wav工具源码)

这也是wav库两个对外函数用法示例

sampleRate := flag.Int("ar", 0, "Audio sample rate")
file := flag.String("f", "", "Pcm audio file name")
wavFile := flag.String("w", "", "The name of the wav file to be created")

flag.Parse()

pcmFile, err := os.Open(*file)
if err != nil {
    fmt.Printf("%s\n", err)
    return
}
defer pcmFile.Close()

pcmFi, err := pcmFile.Stat()
if err != nil {
    fmt.Printf("%s\n", err)
    return
}

wavHead := wav.New(uint16(1), uint32(*sampleRate), uint16(16), uint32(pcmFi.Size()))

wavFd, err := os.Create(*wavFile)
if err != nil {
    fmt.Printf("%s\n", err)
    return
}
defer wavFd.Close()

head, err := wavHead.Marshal()
if err != nil {
    fmt.Printf("%s\n", err)
    return
}

wavFd.Write(head)
io.Copy(wavFd, pcmFile)