setCameraZoomRatio method

Future<int?> setCameraZoomRatio(float zoom)

@detail api @author zhangzhenyu.samuel @brief Change the optical zoom magnification. @param zoom Zoom magnification of the currently used camera (front/postcondition). The value range is 1, < Maximum Zoom Multiplier >.
The maximum zoom factor can be obtained by calling getCameraZoomMaxRatio{@link #RTCEngine#getCameraZoomMaxRatio}. @return - 0: Success. - < 0: Failure. See ReturnStatus{@link #ReturnStatus} for more details. @note - The camera zoom factor can only be set when startVideoCapture{@link #RTCEngine#startVideoCapture} is called for video capture using the SDK internal capture module. - The setting result fails after calling stopVideoCapture{@link #RTCEngine#stopVideoCapture} to turn off internal collection. - Call setVideoDigitalZoomConfig{@link #RTCEngine#setVideoDigitalZoomConfig} to set digital zoom. Call setVideoDigitalZoomControl{@link #RTCEngine#setVideoDigitalZoomControl} to perform digital zoom.

Implementation

Future<int?> setCameraZoomRatio(float zoom) async {
  $a() => ($instance as $p_a.RTCEngine).setCameraZoomRatio(zoom);
  $i() => ($instance as $p_i.ByteRTCEngine).setCameraZoomRatio(zoom);

  if (Platform.isAndroid) {
    return $a();
  } else if (Platform.isIOS) {
    return $i();
  } else {
    throw UnsupportedError(
        'Not Support Platform ${Platform.operatingSystem}');
  }
}