[FFmpeg-devel] [PATCH] HWAccel infrastructure
Wed Feb 18 13:10:54 CET 2009
On Wed, 18 Feb 2009, Michael Niedermayer wrote:
>>>> I am just trying to reuse existing code to know where the current
>>>> slice ends. How could I achieve this purpose otherwise?
>>> how does vdpau do it? a quick look shows no ff_find_start_code() but
>>> i may have missed it
>> VDPAU can offload the whole picture data. VA API specifies this as a
>> per-slice process, i.e. emit all individual slice, one control block
>> at a time (VASliceParameterBufferMPEG2). However, in practise and
>> IIRC, the current Intel implementation does support the once control
>> block at a time approach (akin to NVIDIA's VDPAU implementation) but
>> it's just not specified to work that way. So, I need a way to advance
>> to the next slice, thus determining the actual size of the slice.
> that belongs inside the VA API wraper then, not in mpeg12.c, we wouldnt
> want to slow VDPAU down because of limitations on intels side
That doesn't slow down anything since VDPAU also traverses all slices to
simply count them.
More information about the ffmpeg-devel