[FFmpeg-devel] [PATCH 1/2] vda: decode frame synchronously.

Sebastien Zwickert dilaroga at gmail.com
Fri Aug 10 12:57:35 CEST 2012

On Aug 9, 2012, at 7:52 PM, Michael Niedermayer wrote:

> On Thu, Aug 09, 2012 at 09:39:10AM +0200, Sebastien Zwickert wrote:
>> On Aug 9, 2012, at 4:42 AM, Michael Niedermayer wrote:
>>> On Tue, Aug 07, 2012 at 09:46:46PM +0200, Sebastien Zwickert wrote:
>>>> From: Sebastien Zwickert <dilaroga at free.fr>
>>>> The current implementation of VDA uses the default mode: the hardware decoder is running
>>>> asynchronously, that's why the HWAccel VDA must manage its own queue and then depends
>>>> on pthreads. The client needs to wait until the queue is not empty in order to start
>>>> processing the decoded frame. In VLC, there's a short flicker at the beginning of every
>>>> movies and when we seek in movies due to this asynchrone mode.
>>>> These changes uses the hardware decoder synchronously so that VDA module is now able to
>>>> return the decoded frame into the corresponding frame's data. Thus, the queue and its
>>>> glue code become needless just like the pthreads dependency.
>>>> But this patch removes a public struct and some public functions relative to the
>>>> management of the queue so I bumped the minor version number.
>>> This sounds possibly problematic
>>> is anything using these removed things ?
>>> consider vlc being linked to libavcodec.so.123
>>> if the user updates libavcodec and vlc uses a removed symbol vlc might
>>> not work anymore (depends also on how the symbol is used ...)
>> Keep the both implementations together and mark the symbols this patch remove
>> as deprecated in order to drop them at a future version dump is an acceptable solution ?
> You are the maintainer, its completely your choice, but yes this
> should work fine

Ok. I'll provide a new patch in this way.


More information about the ffmpeg-devel mailing list