[libcamera-devel] [PATCH 2/4] libcamera: v4l2_videodevice: Remove usage of ImageFormats

[Laurent Pinchart]

Hi Niklas,

Thank you for the patch.

On Mon, Mar 16, 2020 at 03:40:34AM +0100, Niklas Söderlund wrote:
> The ImageFormats class is not very nice as it forces the pixel format to
> be an unsigned integer. Replace it with a map of PixelFormat to vector
> of sizes.
> 
> Signed-off-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
> ---
>  src/libcamera/include/v4l2_videodevice.h |  2 +-
>  src/libcamera/pipeline/uvcvideo.cpp      |  3 +--
>  src/libcamera/v4l2_videodevice.cpp       | 11 +++--------
>  3 files changed, 5 insertions(+), 11 deletions(-)
> 
> diff --git a/src/libcamera/include/v4l2_videodevice.h b/src/libcamera/include/v4l2_videodevice.h
> index 2507daf23efac66f..38dfd92544fa2c0e 100644
> --- a/src/libcamera/include/v4l2_videodevice.h
> +++ b/src/libcamera/include/v4l2_videodevice.h
> @@ -184,7 +184,7 @@ public:
>  
>  	int getFormat(V4L2DeviceFormat *format);
>  	int setFormat(V4L2DeviceFormat *format);
> -	ImageFormats formats();
> +	std::map<PixelFormat, std::vector<SizeRange>> formats();

This should be a map of unsigned int to std::vector<SizeRange>, as we're
dealing with V4L2 4CCs here. I would introduce a V4L2PixelFormat class
to model the V4L2 4CCs, to avoid confusion.

>  
>  	int setCrop(Rectangle *rect);
>  	int setCompose(Rectangle *rect);
> diff --git a/src/libcamera/pipeline/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo.cpp
> index 320da2685795c041..b5f98a96a14fe348 100644
> --- a/src/libcamera/pipeline/uvcvideo.cpp
> +++ b/src/libcamera/pipeline/uvcvideo.cpp
> @@ -153,8 +153,7 @@ CameraConfiguration *PipelineHandlerUVC::generateConfiguration(Camera *camera,
>  	if (roles.empty())
>  		return config;
>  
> -	ImageFormats v4l2formats = data->video_->formats();
> -	StreamFormats formats(v4l2formats.data());
> +	StreamFormats formats(data->video_->formats());
>  	StreamConfiguration cfg(formats);
>  
>  	cfg.pixelFormat = formats.pixelformats().front();
> diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp
> index 858310c3b810350a..f9c59d5e3fb65737 100644
> --- a/src/libcamera/v4l2_videodevice.cpp
> +++ b/src/libcamera/v4l2_videodevice.cpp
> @@ -901,21 +901,16 @@ int V4L2VideoDevice::setFormatSingleplane(V4L2DeviceFormat *format)
>   *
>   * \return A list of the supported video device formats
>   */
> -ImageFormats V4L2VideoDevice::formats()
> +std::map<PixelFormat, std::vector<SizeRange>> V4L2VideoDevice::formats()
>  {
> -	ImageFormats formats;
> +	std::map<PixelFormat, std::vector<SizeRange>> formats;
>  
>  	for (unsigned int pixelformat : enumPixelformats()) {
>  		std::vector<SizeRange> sizes = enumSizes(pixelformat);
>  		if (sizes.empty())
>  			return {};
>  
> -		if (formats.addFormat(pixelformat, sizes)) {
> -			LOG(V4L2, Error)
> -				<< "Could not add sizes for pixel format "
> -				<< pixelformat;
> -			return {};
> -		}
> +		formats[pixelformat] = sizes;
>  	}
>  
>  	return formats;

-- 
Regards,

Laurent Pinchart