[libcamera-devel] [PATCH v3 3/5] ipa: rkisp1: Add Yaml tuning file support

[Laurent Pinchart]

Hi Florian,

Thank you for the patch.

On Fri, Jun 17, 2022 at 11:23:13AM +0200, Florian Sylvestre wrote:
> Retrieve root node in Yaml tuning file and provide to
> each algorithm this YamlObject to allow them to grab their default
> parameters by calling init() function.
> 
> Signed-off-by: Florian Sylvestre <fsylvestre at baylibre.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> Reviewed-by: Paul Elder <paul.elder at ideasonboard.com>
> ---
>  src/ipa/rkisp1/rkisp1.cpp | 34 ++++++++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> diff --git a/src/ipa/rkisp1/rkisp1.cpp b/src/ipa/rkisp1/rkisp1.cpp
> index 61a3bab9..5eb23669 100644
> --- a/src/ipa/rkisp1/rkisp1.cpp
> +++ b/src/ipa/rkisp1/rkisp1.cpp
> @@ -14,6 +14,7 @@
>  #include <linux/rkisp1-config.h>
>  #include <linux/v4l2-controls.h>
>  
> +#include <libcamera/base/file.h>
>  #include <libcamera/base/log.h>
>  
>  #include <libcamera/control_ids.h>
> @@ -24,6 +25,7 @@
>  #include <libcamera/request.h>
>  
>  #include "libcamera/internal/mapped_framebuffer.h"
> +#include "libcamera/internal/yaml_parser.h"
>  
>  #include "algorithms/agc.h"
>  #include "algorithms/algorithm.h"
> @@ -61,6 +63,7 @@ public:
>  private:
>  	void setControls(unsigned int frame);
>  	void prepareMetadata(unsigned int frame, unsigned int aeState);
> +	int parseConfigurationFile(File &file);
>  
>  	std::map<unsigned int, FrameBuffer> buffers_;
>  	std::map<unsigned int, MappedFrameBuffer> mappedBuffers_;
> @@ -126,6 +129,37 @@ int IPARkISP1::init(const IPASettings &settings, unsigned int hwRevision)
>  	algorithms_.push_back(std::make_unique<algorithms::Awb>());
>  	algorithms_.push_back(std::make_unique<algorithms::BlackLevelCorrection>());
>  
> +	/* Load the tuning file for this sensor. */
> +	File file(settings.configurationFile.c_str());
> +	if (!file.open(File::OpenModeFlag::ReadOnly)) {
> +		int ret = file.error();
> +		LOG(IPARkISP1, Error)
> +			<< "Failed to open configuration file "
> +			<< settings.configurationFile << ": " << strerror(-ret);
> +		return ret;
> +	}
> +
> +	return parseConfigurationFile(file);
> +}
> +
> +int IPARkISP1::parseConfigurationFile(File &file)
> +{
> +	std::unique_ptr<libcamera::YamlObject> root = YamlParser::parse(file);
> +	if (!root)
> +		return -EINVAL;
> +
> +	const YamlObject &algoObject = (*root)["algorithms"];
> +
> +	if (!algoObject["algorithms"].isDictionary())
> +		return -EINVAL;

I'm surprised that we go past this, as the tuning data file now has a
list for the algorithms element, not a dictionary. I'll test this.

This makes me realize that my suggestion of using a list will also cause
other issues. I'll experiment a bit. Do you mind if I take over and send
a v4, in case that's easier than explaining my findings and asking you
to implement them ?

> +
> +	/* Allow each algo to get parameters from configuration file. */
> +	for (auto const &algo : algorithms_) {
> +		int ret = algo->init(context_, algoObject);
> +		if (ret)
> +			return ret;
> +	}
> +
>  	return 0;
>  }
>  

-- 
Regards,

Laurent Pinchart