[libcamera-devel,v2,07/16] libcamera: v4l2_subdevice: Rework enumPadSizes()

1404 diff mbox series

Align the enumPadSizes() interface and implementation with that of
enumPadCodes(). There is no functional change.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
---
 src/libcamera/include/v4l2_subdevice.h |  4 +--
 src/libcamera/v4l2_subdevice.cpp       | 37 ++++++++++++++------------
 2 files changed, 22 insertions(+), 19 deletions(-)

Hi Niklas!
   nice!

Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

Thanks
   j
On Wed, Jun 12, 2019 at 02:43:50AM +0200, Niklas Söderlund wrote:
> Align the enumPadSizes() interface and implementation with that of
> enumPadCodes(). There is no functional change.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
> ---
>  src/libcamera/include/v4l2_subdevice.h |  4 +--
>  src/libcamera/v4l2_subdevice.cpp       | 37 ++++++++++++++------------
>  2 files changed, 22 insertions(+), 19 deletions(-)
>
> diff --git a/src/libcamera/include/v4l2_subdevice.h b/src/libcamera/include/v4l2_subdevice.h
> index e714e2575022c04d..c6fdf417b43c0423 100644
> --- a/src/libcamera/include/v4l2_subdevice.h
> +++ b/src/libcamera/include/v4l2_subdevice.h
> @@ -58,8 +58,8 @@ protected:
>
>  private:
>  	std::vector<unsigned int> enumPadCodes(unsigned int pad);
> -	int enumPadSizes(unsigned int pad, unsigned int code,
> -			 std::vector<SizeRange> *size);
> +	std::vector<SizeRange> enumPadSizes(unsigned int pad,
> +					    unsigned int code);
>
>  	int setSelection(unsigned int pad, unsigned int target,
>  			 Rectangle *rect);
> diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp
> index 99e202fa264af5a6..35052b4aa45d3e42 100644
> --- a/src/libcamera/v4l2_subdevice.cpp
> +++ b/src/libcamera/v4l2_subdevice.cpp
> @@ -209,10 +209,15 @@ FormatEnum V4L2Subdevice::formats(unsigned int pad)
>  		return {};
>  	}
>
> -	for (unsigned int code : enumPadCodes(pad))
> -		if (enumPadSizes(pad, code, &formatMap[code]))
> +	for (unsigned int code : enumPadCodes(pad)) {
> +		std::vector<SizeRange> sizes = enumPadSizes(pad, code);
> +
> +		if (sizes.empty())
>  			return {};
>
> +		formatMap[code] = sizes;
> +	}
> +
>  	return formatMap;
>  }
>
> @@ -335,25 +340,25 @@ std::vector<unsigned int> V4L2Subdevice::enumPadCodes(unsigned int pad)
>  	return codes;
>  }
>
> -int V4L2Subdevice::enumPadSizes(unsigned int pad,unsigned int code,
> -				std::vector<SizeRange> *sizes)
> +std::vector<SizeRange> V4L2Subdevice::enumPadSizes(unsigned int pad,
> +						   unsigned int code)
>  {
> -	struct v4l2_subdev_frame_size_enum sizeEnum = {};
> +	std::vector<SizeRange> sizes;
>  	int ret;
>
> -	sizeEnum.index = 0;
> -	sizeEnum.pad = pad;
> -	sizeEnum.code = code;
> -	sizeEnum.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> -	while (true) {
> +	for (unsigned int index = 0;; index++) {
> +		struct v4l2_subdev_frame_size_enum sizeEnum = {};
> +		sizeEnum.index = index;
> +		sizeEnum.pad = pad;
> +		sizeEnum.code = code;
> +		sizeEnum.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> +
>  		ret = ioctl(fd_, VIDIOC_SUBDEV_ENUM_FRAME_SIZE, &sizeEnum);
>  		if (ret)
>  			break;
>
> -		sizes->emplace_back(sizeEnum.min_width, sizeEnum.min_height,
> +		sizes.emplace_back(sizeEnum.min_width, sizeEnum.min_height,
>  				    sizeEnum.max_width, sizeEnum.max_height);
> -
> -		sizeEnum.index++;
>  	}
>
>  	if (ret && (errno != EINVAL && errno != ENOTTY)) {
> @@ -361,12 +366,10 @@ int V4L2Subdevice::enumPadSizes(unsigned int pad,unsigned int code,
>  		LOG(V4L2Subdev, Error)
>  			<< "Unable to enumerate sizes on pad " << pad
>  			<< ": " << strerror(-ret);
> -		sizes->clear();
> -
> -		return ret;
> +		return {};
>  	}
>
> -	return 0;
> +	return sizes;
>  }
>
>  int V4L2Subdevice::setSelection(unsigned int pad, unsigned int target,
> --
> 2.21.0
>
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