/// <summary>
/// CameraStateListenerのOnOpenedから呼び出される
/// </summary>
internal void CreateCameraPreviewSession()
{
try
{
if (this.SurfaceTexture == null)
{
throw new IllegalStateException("SurfaceTexture is null");
}
this.SurfaceTexture.SetDefaultBufferSize(PreviewSize.Width, PreviewSize.Height);
//プレビュー用のRequestBuilderを作成
this.PreviewRequestBuilder = this.CameraDevice.CreateCaptureRequest(CameraTemplate.Preview);
Surface previewSurface = new Surface(this.SurfaceTexture);
PreviewRequestBuilder.AddTarget(previewSurface);
//キャプチャ用
//プレビューキャプチャと同じタイミングで動作させるのではなく,独立させたい場合は,RequestBuilderを別に作成する.
//this.StillCaptureBuilder = this.CameraDevice.CreateCaptureRequest(CameraTemplate.StillCapture);
Surface readerSurface = this.ImageReader.Surface;
PreviewRequestBuilder.AddTarget(readerSurface);
List <Surface> surfaces = new List <Surface>();
surfaces.Add(previewSurface);
surfaces.Add(readerSurface);
//CameraCaptureSessionを生成
this.CameraDevice.CreateCaptureSession(surfaces, new CameraCaptureStateListener(this), BackgroundHandler);
}
catch (CameraAccessException ex)
{
ex.PrintStackTrace();
}
}
public void CreateCameraPreviewSession()
{
try
{
SurfaceTexture texture = mTextureView.SurfaceTexture;
if (texture == null)
{
throw new IllegalStateException("texture is null");
}
// We configure the size of default buffer to be the size of camera preview we want.
texture.SetDefaultBufferSize(mPreviewSize.Width, mPreviewSize.Height);
// This is the output Surface we need to start preview.
Surface surface = new Surface(texture);
// We set up a CaptureRequest.Builder with the output Surface.
PreviewRequestBuilder = Device.CreateCaptureRequest(CameraTemplate.Preview);
PreviewRequestBuilder.AddTarget(surface);
// Here, we create a CameraCaptureSession for camera preview.
List <Surface> surfaces = new List <Surface>();
surfaces.Add(surface);
surfaces.Add(mImageReader.Surface);
Device.CreateCaptureSession(surfaces, new CameraCaptureSessionCallback(this), null);
}
catch (CameraAccessException e)
{
e.PrintStackTrace();
}
}
public Command BuildPreviewCommand()
{
var command = new Command("preview");
var builder = new PreviewRequestBuilder(PathParameters, RequestAdapter);
command.AddCommand(builder.BuildPostCommand());
return(command);
}
public void RunPrecaptureSequence()
{
try
{
// This is how to tell the camera to trigger.
PreviewRequestBuilder.Set(CaptureRequest.ControlAePrecaptureTrigger, (int)ControlAEPrecaptureTrigger.Start);
// Tell #mCaptureCallback to wait for the precapture sequence to be set.
State = CameraState.WaitingPrecapture;
CaptureSession.Capture(PreviewRequestBuilder.Build(), CaptureCallback, BackgroundHandler);
}
catch (CameraAccessException e)
{
e.PrintStackTrace();
}
}
public void LockFocus()
{
try
{
// This is how to tell the camera to lock focus.
PreviewRequestBuilder.Set(CaptureRequest.ControlAfTrigger, (int)ControlAFTrigger.Start);
// Tell #mCaptureCallback to wait for the lock.
State = CameraState.WaitingLock;
CaptureSession.Capture(PreviewRequestBuilder.Build(), CaptureCallback, BackgroundHandler);
}
catch (CameraAccessException e)
{
e.PrintStackTrace();
}
}
/// <summary>
/// Lock the focus as the first step for a still image capture.
/// </summary>
private void LockFocus()
{
try
{
// This is how to tell the camera to lock focus.
PreviewRequestBuilder.Set(CaptureRequest.ControlAfTrigger, (int)ControlAFTrigger.Start);
// Tell #CaptureCallback to wait for the lock.
CurrentCameraState = STATE_WAITING_LOCK;
// this will kick off the image-capture pipeline
CaptureSession.Capture(PreviewRequestBuilder.Build(), CaptureCallback, BackgroundHandler);
}
catch (CameraAccessException e)
{
e.PrintStackTrace();
}
}
public void UnlockFocus()
{
try
{
// Reset the auto-focus trigger
PreviewRequestBuilder.Set(CaptureRequest.ControlAfTrigger, (int)ControlAFTrigger.Cancel);
SetAutoFlash(PreviewRequestBuilder);
CaptureSession.Capture(PreviewRequestBuilder.Build(), CaptureCallback, BackgroundHandler);
// After this, the camera will go back to the normal state of preview.
State = CameraState.Preview;
CaptureSession.SetRepeatingRequest(PreviewRequest, CaptureCallback, BackgroundHandler);
}
catch (CameraAccessException e)
{
e.PrintStackTrace();
}
}