[PATCH v3 0/8] Enable raw streams with software ISP

[Robert Mader]

This series does not apply on master any more - can you send out a 
rebased version? Thanks!

FTR.: now that we have the CCM support in, we'll need this series to 
capture raw reference images (with camshark) in order to create tuning 
files.

On 05.03.25 20:26, Milan Zamazal wrote:
> This makes raw streams working again in ‘simple’ pipeline when software
> ISP is enabled for the given device.  At most one raw stream and one
> processed stream (possibly both at once) are supported.
>
> An example ‘cam’ invocation requesting a raw stream rather than a debayered stream:
>
>    cam -c1 -C8 -s role=raw,width=1920,height=1080 -Ffile#.raw
>
> Or for both raw and processed streams:
>
>    cam -c1 -C8 -Ffile# \
>      -s role=viewfinder,width=1920,height=1080,pixelformat=RGB888 \
>      -s role=raw,width=3280,height=2464,pixelformat=SRGGB8 \
>
> When only a raw stream is requested, there are no exposure/gain
> adjustments applied.  This could be improved in future, once software
> ISP gets a mechanism to gather image statistics without processing and
> using them to make the adjustments, or once manual exposure controls are
> added to software ISP.  In the meantime, exposure must be changed
> externally.
>
> Changes in v3:
> - Significantly reworked, with both functional and clarity improvements.
>    The level of guesswork and confusion is hopefully reduced enough now
>    to drop the RFC prefix.
> - The number of streams is set to 2 only with software ISP.
> - SimpleCameraData::pipeConfig_ nullptr check patch dropped.
> - PPM/raw file output patch dropped from this series.  Let’s handle this
>    separately as the patch series is already complex enough.
>
> Changes in v2:
> - Completely reworked.
> - Extended to be able to produce a raw stream together with a processed
>    stream.
>
> Milan Zamazal (8):
>    libcamera: simple: Set the number of software ISP streams to 2
>    libcamera: simple: Don't use raw output formats with conversions
>    libcamera: simple: Add plain output configurations
>    libcamera: simple: Identify requested stream roles
>    libcamera: simple: Consider raw output configurations
>    libcamera: simple: Validate raw stream configurations
>    libcamera: simple: Don't enforce conversion with an added raw stream
>    libcamera: simple: Make raw streams working
>
>   src/libcamera/pipeline/simple/simple.cpp | 231 +++++++++++++++++------
>   1 file changed, 173 insertions(+), 58 deletions(-)
>
-- 
Robert Mader
Consultant Software Developer

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