/// <summary>
/// OnImageAvailableから呼び出される
/// </summary>
private async void ProcessOnImageAvailable()
{
//this._owner.BackgroundHandler.Post(new ImageSaver(reader.AcquireNextImage()));
var image = this._owner.ImageReader.AcquireNextImage();
ByteBuffer buffer = image.GetPlanes()[0].Buffer;
byte[] jpegBytes = new byte[buffer.Remaining()];
buffer.Get(jpegBytes);
image.Close();
//acquireNextImageのあとでないと,次を取得せずに止まる.
if (DroidCameraPreview2.UPDATE_FRAME_SPAN == 0)
{
return;
}
//Frameカウントを取得できていないとずっと動き続けてしまうので
if (this._owner.FrameCount == 0)
{
return;
}
//指定したフレーム間隔でBitmapを取得する
if (this._owner.FrameCount % DroidCameraPreview2.UPDATE_FRAME_SPAN != 0)
{
return;
}
//bytes[]→回転+bitmap→byte[]
using (var ms = new MemoryStream(jpegBytes))
{
#region 画像回転
this._owner.AndroidBitmap_Rotated = await ImageUtility.RotateAndBitmap(ms, this._owner.SensorOrientation);
#endregion
#region byte[]へ
//AndroidBitmap→byte[]
this._owner.JpegBytes = await ImageUtility.AndroidBitmapToByteArray(this._owner.AndroidBitmap_Rotated);
#endregion
}
return;
#region Firebase face detectを使った顔検出
var imgForFirebase = FirebaseVisionImage.FromBitmap(this._owner.AndroidBitmap_Rotated);
var options = new FirebaseVisionFaceDetectorOptions.Builder().Build();
var detector = FirebaseVision.GetInstance(this._owner.FirebaseApp)
.GetVisionFaceDetector(options);
detector.DetectInImage(imgForFirebase)
.AddOnSuccessListener(this._owner.DetectSuccessListener);
#endregion
}