External camera Android about artoolkitx HOT 6 OPEN

Ah, so if the camera interface is via java methods, you'll need to manually feed the frames to the native side. The new videoExternal module supports this. I can help some more from mid-next week.

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Hi, if I understand correctly, this is an external camera supported by other Android camera apps? If so, it might be as simple as requesting the external camera in the configuration. I've listed the options here: https://github.com/artoolkitx/artoolkitx/wiki/artoolkitX-video-module-configuration-reference#ar_video_module_android. If the camera correctly registers itself as external, you might be able to connect to it by using video config string of -module=Android -native -position=external. See https://github.com/artoolkitx/artoolkitx/wiki/artoolkitX-video-module-configuration-reference#changing-video-configuration for details on how to change the video configuration in your app.

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Hi, the device was not recognized as an external camera (((. It only have function
override fun onCaptureData(timestamp: Long, bytes: ByteArray)
where I can get a frame and send it to artoolkitx

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Hi, i'm back. May you describe a way to use external camera?

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@philip-lamb

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I don't see anything in the Moverio SDK docs on the format of the buffers returned, but I guess a reasonable guess would be that they're NV21 format.

Since you will need to pass the video frames to artoolkitX externally, you will need to make a couple of changes in ARController.java's start() method.

At https://github.com/artoolkitx/artoolkitx/blob/master/Source/ARXJ/ARXJProj/arxj/src/main/java/org/artoolkitx/arx/arxj/ARController.java#L141, change it to arwStartRunning("-module=External", cameraParaPath), and then add an extra line: ARX_jni.arwVideoPushInit(0, width, height, "NV21", 0, 0);

You'll need to use the CaptureDataCallback2 type:

mCaptureDataCallback = new CaptureDataCallback2() {
							@Override
							public void onCaptureData(long timestamp, byte[] data) {
							    ARX_jni.arwVideoPush(0,
							        data, data.limit(), 0, 0, // OK to provide 0 for strides when using NV21.
							        null, 0, 0, 0,
								null, 0, 0, 0,
							        null, 0, 0, 0);
						        }
						    };

Also, you must call ARX_jni.arwVideoPushFinal() before calling arwVideoStop

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