Exemplo n.º 1
2
func NewEncoder(sampleRate, channels int, application Application) (*Encoder, error) {
	encoder := &Encoder{}
	encoder.data = make([]byte, int(C.opus_encoder_get_size(C.int(channels))))
	encoder.cEncoder = (*C.struct_OpusEncoder)(unsafe.Pointer(&encoder.data[0]))

	ret := C.opus_encoder_init(encoder.cEncoder, C.opus_int32(sampleRate), C.int(channels), C.int(application))
	if err := getErr(ret); err != nil {
		return nil, err
	}
	return encoder, nil
}
Exemplo n.º 2
0
// Init initializes a pre-allocated opus encoder. Unless the encoder has been
// created using NewEncoder, this method must be called exactly once in the
// life-time of this object, before calling any other methods.
func (enc *Encoder) Init(sample_rate int, channels int, application Application) error {
	if enc.p != nil {
		return fmt.Errorf("opus encoder already initialized")
	}
	if channels != 1 && channels != 2 {
		return fmt.Errorf("Number of channels must be 1 or 2: %d", channels)
	}
	size := C.opus_encoder_get_size(C.int(channels))
	enc.mem = make([]byte, size)
	enc.p = (*C.OpusEncoder)(unsafe.Pointer(&enc.mem[0]))
	errno := int(C.opus_encoder_init(
		enc.p,
		C.opus_int32(sample_rate),
		C.int(channels),
		C.int(application)))
	if errno != 0 {
		return opuserr(int(errno))
	}
	return nil
}