Hey everyone! I have a project I'm working on in ...

# compose-desktop

[Abdullah Musa]

Hey everyone!

I have a project I'm working on in Uni, that uses KMP and Compose Multiplatform for Android and Desktop.
I'm trying to implement broadcasting video using WebRTC, using the webrtc-java library on the desktop end, and I'm currently stuck at displaying the received VideoFrames.

How can I achieve this?

[Dominaezzz]

You should be able to draw the frames to a canvas. Can't vouch for the performance

[Abdullah Musa]

I'm not very familiar with canvas or rendering. Can you provide some documentation, demo or tutorial on how to do this?
The library uses a NativeI420Buffer with these properties:

ByteBuffer dataY;
ByteBuffer dataU;
ByteBuffer dataV;
int strideY;
int strideU;
int strideV;
int width;
int height;

[Timo Drick]

Don't think this is supported by skia. Here is sample code how to put data into a Bitmap with BGRA_8888 format:

val skiaFormat = ImageInfo(targetWidth, targetHeight, ColorType.BGRA_8888, ColorAlphaType.OPAQUE)
val bufferBitmap = Bitmap().also {
   it.allocPixels(skiaFormat)
}
// Than you can put data into this bitmap:
bufferBitmap.installPixels(jArray) // this is a ByteArray with the data in correct format.

[Timo Drick]

Maybe the library you are using is able to convert the image into a format which is supported in skia.