[PATCH v1 2/3] treewide: Remove `libcamera::LOG(...)` occurences

[Laurent Pinchart]

Hi Barnabás,

Thank you for the patch.

On Mon, Mar 03, 2025 at 04:48:43PM +0100, Barnabás Pőcze wrote:
> When a class inherits from `Loggable`, it will have a protected
> `_log()` method and that will be used instead of the global
> `_log()` method in the expansion of the `LOG()` macro. However,

s/method/function/

> if such a class has static member functions, then simply writing
> `LOG()` will not work because name lookup will find the non-static
> member function and no the global function, resulting in a compiler
> error because the non-static member cannot be invoked without
> an object, and there is no object in a static member function.
> 
> This can be avoided by using `using libcamera::_log;`, thereby
> bringing the global declaration into the current scope.
> 
> Signed-off-by: Barnabás Pőcze <barnabas.pocze at ideasonboard.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> ---
>  src/libcamera/sensor/camera_sensor_raw.cpp |  8 +++++---
>  src/libcamera/v4l2_device.cpp              | 10 ++++++----
>  2 files changed, 11 insertions(+), 7 deletions(-)
> 
> diff --git a/src/libcamera/sensor/camera_sensor_raw.cpp b/src/libcamera/sensor/camera_sensor_raw.cpp
> index ab75b1f82..b6f16f58a 100644
> --- a/src/libcamera/sensor/camera_sensor_raw.cpp
> +++ b/src/libcamera/sensor/camera_sensor_raw.cpp
> @@ -171,10 +171,12 @@ CameraSensorRaw::~CameraSensorRaw() = default;
>  std::variant<std::unique_ptr<CameraSensor>, int>
>  CameraSensorRaw::match(MediaEntity *entity)
>  {
> +	using libcamera::_log;
> +
>  	/* Check the entity type. */
>  	if (entity->type() != MediaEntity::Type::V4L2Subdevice ||
>  	    entity->function() != MEDIA_ENT_F_CAM_SENSOR) {
> -		libcamera::LOG(CameraSensor, Debug)
> +		LOG(CameraSensor, Debug)
>  			<< entity->name() << ": unsupported entity type ("
>  			<< utils::to_underlying(entity->type())
>  			<< ") or function (" << utils::hex(entity->function()) << ")";
> @@ -199,7 +201,7 @@ CameraSensorRaw::match(MediaEntity *entity)
>  			break;
>  
>  		default:
> -			libcamera::LOG(CameraSensor, Debug)
> +			LOG(CameraSensor, Debug)
>  				<< entity->name() << ": unsupported pad " << pad->index()
>  				<< " type " << utils::hex(pad->flags());
>  			return { 0 };
> @@ -207,7 +209,7 @@ CameraSensorRaw::match(MediaEntity *entity)
>  	}
>  
>  	if (numSinks < 1 || numSinks > 2 || numSources != 1) {
> -		libcamera::LOG(CameraSensor, Debug)
> +		LOG(CameraSensor, Debug)
>  			<< entity->name() << ": unsupported number of sinks ("
>  			<< numSinks << ") or sources (" << numSources << ")";
>  		return { 0 };
> diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
> index 2f65a43a0..8fda38949 100644
> --- a/src/libcamera/v4l2_device.cpp
> +++ b/src/libcamera/v4l2_device.cpp
> @@ -989,6 +989,8 @@ template std::optional<ColorSpace> V4L2Device::toColorSpace(const struct v4l2_mb
>  template<typename T>
>  int V4L2Device::fromColorSpace(const std::optional<ColorSpace> &colorSpace, T &v4l2Format)
>  {
> +	using libcamera::_log;
> +
>  	v4l2Format.colorspace = V4L2_COLORSPACE_DEFAULT;
>  	v4l2Format.xfer_func = V4L2_XFER_FUNC_DEFAULT;
>  	v4l2Format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
> @@ -1017,7 +1019,7 @@ int V4L2Device::fromColorSpace(const std::optional<ColorSpace> &colorSpace, T &v
>  	if (itPrimaries != primariesToV4l2.end()) {
>  		v4l2Format.colorspace = itPrimaries->second;
>  	} else {
> -		libcamera::LOG(V4L2, Warning)
> +		LOG(V4L2, Warning)
>  			<< "Unrecognised primaries in "
>  			<< ColorSpace::toString(colorSpace);
>  		ret = -EINVAL;
> @@ -1027,7 +1029,7 @@ int V4L2Device::fromColorSpace(const std::optional<ColorSpace> &colorSpace, T &v
>  	if (itTransfer != transferFunctionToV4l2.end()) {
>  		v4l2Format.xfer_func = itTransfer->second;
>  	} else {
> -		libcamera::LOG(V4L2, Warning)
> +		LOG(V4L2, Warning)
>  			<< "Unrecognised transfer function in "
>  			<< ColorSpace::toString(colorSpace);
>  		ret = -EINVAL;
> @@ -1037,7 +1039,7 @@ int V4L2Device::fromColorSpace(const std::optional<ColorSpace> &colorSpace, T &v
>  	if (itYcbcrEncoding != ycbcrEncodingToV4l2.end()) {
>  		v4l2Format.ycbcr_enc = itYcbcrEncoding->second;
>  	} else {
> -		libcamera::LOG(V4L2, Warning)
> +		LOG(V4L2, Warning)
>  			<< "Unrecognised YCbCr encoding in "
>  			<< ColorSpace::toString(colorSpace);
>  		ret = -EINVAL;
> @@ -1047,7 +1049,7 @@ int V4L2Device::fromColorSpace(const std::optional<ColorSpace> &colorSpace, T &v
>  	if (itRange != rangeToV4l2.end()) {
>  		v4l2Format.quantization = itRange->second;
>  	} else {
> -		libcamera::LOG(V4L2, Warning)
> +		LOG(V4L2, Warning)
>  			<< "Unrecognised quantization in "
>  			<< ColorSpace::toString(colorSpace);
>  		ret = -EINVAL;

-- 
Regards,

Laurent Pinchart