I am working on jiuqiant's mediapipe face detection app. I cloned the repo, the app works fine, detects my face but when I pause the app and resumes back, it crashes. with error on this line permalink
converter.setSurfaceTextureAndAttachToGLContext(
previewFrameTexture,
displaySize.getWidth(),
displaySize.getHeight());
with this log
D/CameraXPreviewHelper: viewSize or frameSize is null.
E/SurfaceView: Exception configuring surface
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.util.Size.getWidth()' on a null object reference
at com.example.myfacedetectionapp.MainActivity$1.surfaceChanged(MainActivity.java:146)
at android.view.SurfaceView.updateSurface(SurfaceView.java:802)
at android.view.SurfaceView$2.onPreDraw(SurfaceView.java:163)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:977)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3044)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1845)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8235)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:994)
at android.view.Choreographer.doCallbacks(Choreographer.java:806)
at android.view.Choreographer.doFrame(Choreographer.java:738)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:980)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:226)
at android.app.ActivityThread.main(ActivityThread.java:7178)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:503)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)
It is clear that setSurfaceTextureAndAttachToGLContext is returning null value.
Looking at source code (below is the setSurfaceTextureAndAttachToGLContext function in com.google.mediapipe.components.ExternalTextureConverter)
if (viewSize != null && this.frameSize != null) {
Size optimalSize = this.getOptimalViewSize(viewSize);
return optimalSize != null ? optimalSize : this.frameSize;
} else {
Log.d("CameraXPreviewHelper", "viewSize or frameSize is null.");
return null;
}
it seems that this.frameSize is null. But I dont know how to fix this.
I also tried to hardcode the values
converter.setSurfaceTextureAndAttachToGLContext(previewFrameTexture,200,200);
but it also gives error
I/GLConsumer: [SurfaceTexture-0-13076-0] attachToContext
E/GLConsumer: [SurfaceTexture-0-13076-0] attachToContext: GLConsumer is already attached to a context
E/BpSurfaceComposerClient: Failed to transact (-1)
E/BpSurfaceComposerClient: Failed to transact (-1)
D/GlThread: Stopping GL thread ExternalTextureConverter
D/CaptureSession: Opening capture session.
E/AndroidRuntime: FATAL EXCEPTION: ExternalTextureConverter
Process: com.example.myfacedetectionapp, PID: 13076
java.lang.RuntimeException: Error during attachToGLContext (see logcat for details)
at android.graphics.SurfaceTexture.attachToGLContext(SurfaceTexture.java:289)
at com.google.mediapipe.components.ExternalTextureConverter$RenderThread.setSurfaceTextureAndAttachToGLContext(ExternalTextureConverter.java:247)
at com.google.mediapipe.components.ExternalTextureConverter.lambda$setSurfaceTextureAndAttachToGLContext$2$ExternalTextureConverter(ExternalTextureConverter.java:166)
at com.google.mediapipe.components.-$$Lambda$ExternalTextureConverter$VQm8xcL00VolxXr4rMIgGUKVKnw.run(Unknown Source:8)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:226)
at com.google.mediapipe.glutil.GlThread.run(GlThread.java:141)
Is it some version problem. I cant understand.
steps to recreate -
Clone repo and run.
Thats it. Now try pausing and resuming the app. please let me know if you dont face the error.