I've got some code that uses gstreamer to capture video frames (using appsink) and then render them to the screen using textures under GLES.
The code basically does: 1) Grab image; 2) Use one call per image row to glTexSubImage2D to update the texture 3) Render the texture to a quad. Sometime this runs ok (for weeks). Sometimes it crashes. When it crashes a segfault is thrown in openGLES.so (using PRV drivers). It looks as if this happens in the call to glTexSubImage2D. I also suspect that some calls never return. I've found that I need to add a call to glFinish() after the call to glTexSubImage2D. If I don't, some of the lines are sometimes filled with 'static'. To me this looks like some sort of memory/timing issue. Do I need to perform some sort of manual GPU/CPU synchronisation? Adding significant amounts of diagnostic output (to std::cerr) makes the problem a heisenbug! Chris Tapp opensou...@keylevel.com www.keylevel.com _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
