[EXT] Re: [PATCH v4] gstreamer: Fixate colorimetry field during caps negotiation

[Qi Hou]

Hi Laurent Pinchart,

Sorry for replying to this mail so late as I missed it. I will pick the tags and include the changelog between new and old version next time. 
There is no code difference between v3 and v4. I just changed the commit title from " gstreamer: Read correct colorimetry from caps into the stream configuration" to " gstreamer: Fixate colorimetry field during caps negotiation". Please help merge it.
Thank you so much.

Regards,
Qi Hou

-----Original Message-----
From: Laurent Pinchart <laurent.pinchart at ideasonboard.com> 
Sent: 2024年12月18日 20:05
To: Qi Hou <qi.hou at nxp.com>
Cc: libcamera-devel at lists.libcamera.org; Jared Hu <jared.hu at nxp.com>; Julien Vuillaumier <julien.vuillaumier at nxp.com>
Subject: [EXT] Re: [PATCH v4] gstreamer: Fixate colorimetry field during caps negotiation

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Hi Hou,

What is the difference between v3 and v4 ?

When posting a new version, please include a local changelog below the
--- line. See below.

On Wed, Dec 18, 2024 at 04:20:25PM +0900, Hou Qi wrote:
> When libcamerasrc is negotiating with downstream element, it first 
> extracts colorimetry field from downstream supported caps, then set 
> this colorimetry to its stream configuration and propagates the 
> colorimetry downstream.
>
> Currently libamerasrc only considers the case there is one colorimetry 
> in colorimetry field of downstream caps. But the issue is that 
> downstream caps may report a list of supported colorimetry, which 
> causes libcamerasrc to set unknown colorimetry to stream configuration 
> and negotiate fail with downstream element.
>
> In order to fix the issue, need to fixate colorimetry field before 
> getting colorimetry string.
>
> Signed-off-by: Hou Qi <qi.hou at nxp.com>

Please remember to pick the tags you have previously received (Reviewed-by, Tested-by, Acked-by, ...) and include them in new versions.

> ---

Here you can add

---
Changes since v3:

- ...
- ...
---

There's no need to resubmit this patch, I'll merge it with the tags from v3.

>  src/gstreamer/gstlibcamera-utils.cpp | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/src/gstreamer/gstlibcamera-utils.cpp 
> b/src/gstreamer/gstlibcamera-utils.cpp
> index a466b305..7b34c759 100644
> --- a/src/gstreamer/gstlibcamera-utils.cpp
> +++ b/src/gstreamer/gstlibcamera-utils.cpp
> @@ -493,9 +493,12 @@ void 
> gst_libcamera_configure_stream_from_caps(StreamConfiguration 
> &stream_cfg,
>
>       /* Configure colorimetry */
>       if (gst_structure_has_field(s, "colorimetry")) {
> -             const gchar *colorimetry_str = gst_structure_get_string(s, "colorimetry");
> +             const gchar *colorimetry_str;
>               GstVideoColorimetry colorimetry;
>
> +             gst_structure_fixate_field(s, "colorimetry");
> +             colorimetry_str = gst_structure_get_string(s, 
> + "colorimetry");
> +
>               if (!gst_video_colorimetry_from_string(&colorimetry, colorimetry_str))
>                       g_critical("Invalid colorimetry %s", 
> colorimetry_str);
>

--
Regards,

Laurent Pinchart