Yes, the intention with the overlay interface is to be able to support
V4L2 and other overlay hardware.

On Jan 21, 1:02 am, hanchao3c <hancha...@gmail.com> wrote:
> The hardware interface is continue changeing in cupcake branch.
>
> The hardware overlay interface has some changes now .
>
> libhardware/include/hardware/overlay.h
>
> Sample Code :
> hardware/libhardware/modules/overlay/overlay.cpp
>
> # The main change list:
> 1.  overlay_device are separated as overlay_control_device and
> overlay_data_device
> 2.  Data path : remove the  swapBuffers , getOffset and  getMemory
>                          Add the dequeueBuffer and overlay_buffer_t !
>
> The old interface  is designed for using for pmem, which is like a fb
> driver.
>
> The new interface is more nature for using v4l2 output driver.
>
> Do it mean v4l2 output driver will be the common item for Android ?
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