[lkml]   [2019]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v7 2/4] media: videodev2: add V4L2_FMT_FLAG_FIXED_RESOLUTION
On Wed, 2019-06-05 at 15:39 +0200, Hans Verkuil wrote:
> Hi Maxime,
> I am wondering if this flag shouldn't be inverted: you set
> V4L2_FMT_FLAG_DYN_RESOLUTION if dynamic resolution is supported,
> otherwise it isn't.
> Can all the existing mainlined codec drivers handle midstream
> resolution changes?
> s5p-mfc, venus and mediatek can, but I see no SOURCE_CHANGE event in
> the coda drivers, so I suspect that that can't handle this.
> Philipp, what is the status of the coda driver for dynamic resolution
> changes?

FTR, to my knowledge there is no dynamic resolution change support in
the firmware, as there is no signal (interrupt nor picture run return
value) to indicate that different headers were parsed.

I am planning to add the initial source change event required by the
current decoder API documentation, but I am afraid there will be no
support for source changes due to mid-stream resolution changes due to
firmware limitations.


 \ /
  Last update: 2019-06-11 10:52    [W:0.089 / U:0.444 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site