[Intel-gfx] [Libva] keep Nalu start code in VASliceDataBufferType data

[Randy Li]

On 08/31/2016 09:52 AM, Xiang, Haihao wrote:
> On Tue, 2016-08-30 at 08:59 +0800, Randy Li wrote:
>> Hi all:
>>    When I just doing the driver for us chip, we would request the
>> Nalu
>> header present in the data to be process. But I found the data be
>> Rendered to with type VASliceDataBufferType is removed the Nalu start
>> code. Is there any way to make the client send the data without
>> remove
>> the start code ? Thank you.
>
> Do you mean the start code prefix 0x000001?  It depends on the codec,
> VA-API has this requirement for HEVC, but no for AVC.
>
> For AVC, I don't think the existing softwares using vaapi send the
> prefix to driver, you have to workaround it in your driver. but if the
> application is developed by yourself, you may send the prefix with
> setting the right slice_data_offset, so other drivers can work well
> with your application.
I see thank you. I think the Intel could handle the offset. So I think 
it could be regard as a bug for Gstreamer. I would report the Gstreamer.


-- 
Randy Li
The third produce department