Enable librealsense on unrooted android devices

[matkatz]

This PR is based on the work done by @dperox and @aangerma to enable access to RealSense device via librealsense on unrooted android device.

The PR includes the following:

• An Android studio project which generates a native librealsense so and/or AAR.
• Java example that captures and display the color and depth streams.
• Java/NDK Example that demonstrates how to access librealsense native API via JNI.

Currently the java API includes the minimal required functionality to allow basic streaming.

The Android project is located at /wrappers/android

[ssakhavi]

@matkaz thanks for the awesome wrapper.

Just a few things:

• Currently there is no support for additional filter operations (i.e. Alignment) Maybe something similar to the options can be written for the wrapper?

• An option to enter Advanced mode and modify would be nice ( I'm not sure the current options covers all the parameters)

• Saving and loading Frames is a feature that is used in many cases to communicate and do calculations on server and Android.

[ssakhavi]

@matkatz

The current version has a very bad delay(~10s!) when the device wants to load and show the RealSense data.
Where is this delay coming from?

[matkatz]

@ssakhavi, sorry for the late response (twice)

• Currently there is no support for additional filter operations (i.e. Alignment) Maybe something similar to the options can be written for the wrapper?
• An option to enter Advanced mode and modify would be nice ( I'm not sure the current options >
  covers all the parameters)

We Plan to add support in all of librealsense API in the future, currently if you are missing functionality you can work with the native API.

• Saving and loading Frames is a feature that is used in many cases to communicate and do calculations on server and Android.

Playback and record are now supported, please check the examples for more details.

The current version has a very bad delay(~10s!) when the device wants to load and show the RealSense data. Where is this delay coming from?

Can you explain what do you mean by delay? Is it the time to the first frame after start or something else? Also what Android device are you using for testing?

[ssakhavi]

It's okay @matkatz Regarding the Advanced mode and Alignment, we managed to implement it the same way that you did. We also implemented "background remover" as a processing block to make it faster. The problem we have now is that is this: When wanting to set the parameters for Advanced mode, we need a device handle. Getting the handle adds around 3 extra seconds in addition to starting the pipeline. So our delay is around 8-10 seconds overall. Our code is here if you want to look at it : https://github.com/KroniKare/RealSense-NewAndroid/tree/KroniKare-Update/src/android/jni

…

On Tue, 19 Feb 2019, 22:20 MatKatz, ***@***.***> wrote: @ssakhavi <https://github.com/ssakhavi>, sorry for the late response (twice) - Currently there is no support for additional filter operations (i.e. Alignment) Maybe something similar to the options can be written for the wrapper? - An option to enter Advanced mode and modify would be nice ( I'm not sure the current options > covers all the parameters) *We Plan to add support in all of librealsense API in the future, currently if you are missing functionality you can work with the native API <https://github.com/matkatz/librealsense/tree/unrooted_android_device_support/wrappers/android/examples/native_example>.* - Saving and loading Frames is a feature that is used in many cases to communicate and do calculations on server and Android. *Playback and record are now supported, please check the examples <https://github.com/matkatz/librealsense/tree/unrooted_android_device_support/wrappers/android/examples> for more details.* The current version has a very bad delay(~10s!) when the device wants to load and show the RealSense data. Where is this delay coming from? *Can you explain what do you mean by delay? Is it the time to the first frame after start or something else? Also what Android device are you using for testing?* — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#3083 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFwDe-kBF1O6mPBFpH6ucPM9dAaefn9Cks5vPAg7gaJpZM4aEmW_> .

[dorodnic]

@ssakhavi - let's follow-up via a new issue

[ssakhavi]

Btw, @matkatz, your code is awesome. I enjoyed my time playing around with it.