transfer pcm to opus

[likezjuisee]

The pcm data I got is "[]byte" format, so how can I transfer it to "int16", and then encode to opus?
I have tried the code as below, but the output file is not opus file, and can't play.

func writeUSBDataToSamples(usbData []byte) []wav.Sample {
samples := make([]wav.Sample, 0)
for i := 0; i < len(usbData); i += 2 {
sample := wav.Sample{}
sample.Values[0] = int(usbData[i])
sample.Values[0] = int(usbData[i+1])
samples = append(samples, sample)
}
return samples
}

opusOutput := make([]byte, 0)
opusData := make([]byte, 4096)

encodedNumSum := 0
for encodedNumSum+OpusFrameSize < len(pcmInt16Data) {
	encodedNum, err := enc.Encode(pcmInt16Data[encodedNumSum:(encodedNumSum+OpusFrameSize)], opusData)
	if err != nil {
		fmt.Println("enc.Encode err ", err.Error())
		break
	}
	fmt.Println("encodedNum ", encodedNum)
	opusOutput = append(opusOutput, opusData[:encodedNum]...)
	encodedNumSum += OpusFrameSize
}
fmt.Println("opusOutput length ", len(opusOutput))
fopus, _ := os.OpenFile("output.opus", os.O_RDWR|os.O_CREATE, 0777)
fopus.Write(opusOutput)
fopus.Close()

[hraban]

There is a difference between an opus stream (which is an ogg/opus stream) and raw opus data. .opus files are really .ogg files with opus data, which this package doesn't provide a way to write. It does have a reader for it (Stream type), but no writer yet (never bothered to because I haven't needed it so far, but feel free to submit a PR).

[likezjuisee]

Thank you, I got it.