Method Decode

backend/go/opus/codec.go:213–235

Decode decodes an Opus packet into pcm. frameSize is the max number of samples per channel that pcm can hold. Returns the number of decoded samples per channel.

(data []byte, pcm []int16, frameSize int, fec bool)

// samples per channel that pcm can hold. Returns the number of decoded samples
// per channel.
func (d *Decoder) Decode(data []byte, pcm []int16, frameSize int, fec bool) (int, error) {
	if len(pcm) == 0 {
		return 0, errors.New("opus decode: empty output buffer")
	}

	var dataPtr *byte
	var dataLen int32
	if len(data) > 0 {
		dataPtr = &data[0]
		dataLen = int32(len(data))
	}

	decodeFec := int32(0)
	if fec {
		decodeFec = 1
	}

	n := cDecode(d.st, dataPtr, dataLen, &pcm[0], int32(frameSize), decodeFec)
	if n < 0 {
		return 0, fmt.Errorf("opus_decode failed: error %d", n)
	}
	return int(n), nil
}

func (d *Decoder) Close() {
	if d.st != 0 {