Discussion of CameraConfiguration with extra information: target fps/CaptureIntent

[Naushir Patuck]

Hi Harvey,

We did look into something similar some years back.  I prototyped a
patch series introducing stream hints that are entirely options, but
would provide a way for the applications to hint to the pipeline
handler what intended use case may be for each stream.  This did not
get merged, but you can find the series at:

https://patchwork.libcamera.org/project/libcamera/list/?series=3739

Perhaps this is a mechanism to get what you want as well?

Regards,
Naush

On Wed, 23 Oct 2024 at 09:59, Cheng-Hao Yang <chenghaoyang at chromium.org> wrote:
>
> Hi libcamera developers,
>
> I found a patch in cros mtkisp7 branch that I don't think you'd like:
> https://chromium-review.googlesource.com/c/chromiumos/third_party/libcamera/+/5675025/comments/458a308a_be91eda8
>
> This patch adds the information in CameraConfiguration that the
> intention is StillCapture or Preview/Video, which is determined by the
> target fps in Android adaptor [1]. The information is needed to
> configure modes in the proprietary libraries.
>
> I understand that it doesn't meet the design of CameraConfiguration,
> but have we considered passing target fps as an argument when doing
> configuration?
> I'd also like to know if there are other approaches to satisfy
> mtkisp7's requirements. Thanks!
>
> BR,
> Harvey
>
>
>
> [1]: https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/third_party/libcamera/mtkisp7/src/android/camera_device.cpp;l=900