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map sp<ANativeWindow> buffer to another android process

Shiju Jose
Prodigy 30 points

Hello,

OS: android ICS on Pandaboard

We tried to map the video rendering buffer assosiated with the sp<ANativeWindow> for video buffer sharing across android processes. We tried mapping of the above buffer's fd(file descriptor) using both MemoryHeapBase (android binder IPC) and mmap function. However the calls to map the buffer failed with the below error

PVR_K:(Error): PVRMMap: Attempted to mmap unregistered area at vm_pgoff 0x0 [783, drivers/gpu/pvr/mmap.c]   

Also tried to register the buffer using GraphicBufferMapper.registerBuffer(buf->handle) before doing mapping, which also failed with the same error.

Any help on this would be much appreciated.

Thanks, Shiju