我正在尝试在预览模式下获取相机帧。我正在运行来自GitHub的示例项目:https://github.com/googlesamples/android-Camera2Basic
我遇到的问题是在预览模式下获取帧。
这里是代码:
private CameraCaptureSession.CaptureCallback mCaptureCallback = new CameraCaptureSession.CaptureCallback() {
private void process(CaptureResult result) {
switch (mState) {
case STATE_PREVIEW: {
//HERE, HOW CAN I RETRIEVE THE CURRENT FRAME?
break;
}
case STATE_WAITING_LOCK: {
...
break;
}
case STATE_WAITING_PRECAPTURE: {
...
break;
}
case STATE_WAITING_NON_PRECAPTURE: {
...
break;
}
}
}
我尝试通过设置mImageReader.setOnImageAvailableListener来获取帧。我期望在onImageAvailable回调中能够获取到帧,但是onImageAvailable从未被调用过。onPreviewFrame是我的自定义方法,我需要将当前帧传递给它。
mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG, /*maxImages*/2);
mImageReader.setOnImageAvailableListener(mOnImageAvailableListener, mBackgroundHandler);
private final ImageReader.OnImageAvailableListener mOnImageAvailableListener = new ImageReader.OnImageAvailableListener() {
@Override
public void onImageAvailable(ImageReader reader) {
mTextureView.onPreviewFrame(reader.acquireNextImage().getPlanes([0].getBuffer().array());
}
};
我做错了什么?谢谢。