Epson Moverio Pro BT-2000, Developer'S Manual

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MOVERIO Pro Developer's Guide (Rev.1.4)
94

Usage procedure

Remarks

You need to reserve the buffer region from the application.

This provides high-speed processing when compared to setPreviewCallback or
setOneShotPreviewCallback by securing and opening the memory.

The application developer needs to describe the buffer management process.
Specifically, the following processes are necessary.

Register the buffer to be used in addCallbackBuffer described later.

Calculate the size of the buffer to be registered as the width x height x byte
per 1pixel. The width and the height should both be higher than their
respective resolutions.

Each time onPreviewFrame is called, you need to re-register the buffer.

If no buffer is registered, the frame is corrupted and is not called by the
callback method.

You can register multiple buffers.
// App developer applies processing when acquiring image data
private Camera.PreviewCallback mPreviewCB = new
Camera.PreviewCallback() {
@Override
public void onPreviewFrame(byte
data[], Camera camera) {
Log.d(TAG, "Save preview image");
synchronized (lockObject) {
savePreviewData(data);
}
// Register the buffer to be used
camera.addCallbackBuffer(mPreviewData);
}
};
// Register the buffer to be used
camera.addCallbackBuffer(mPreviewData);
//Register the callback method at the optimal time
camera.setPreviewCallbackWithBuffer(mPreviewCB);