[libcamera-devel] [PATCH 1/2] gstreamer: Check if Stream configurations were generated correctly

[Laurent Pinchart]

Hi Javier,

Thank you for the patch.

On Fri, Oct 01, 2021 at 12:36:23PM -0400, Nicolas Dufresne wrote:
> Le vendredi 01 octobre 2021 à 18:10 +0200, Javier Martinez Canillas a écrit :
> > Currently, the gst_libcamera_device_new() function assumes that a call to
> > Camera::generateConfiguration() will always succeed, but that may not be
> > the case and the return value must to be checked.
> > 
> > Otherwise, could lead to a NULL pointer deference if the pipeline handler
>           *this*                          dereference

I'll fix this when applying.

> > failed to generate a configuration for the VideoRecording stream role.
> > 
> > Signed-off-by: Javier Martinez Canillas <javierm at redhat.com>
> 
> Reviewed-by: Nicolas Dufresne <nicolas.dufresne at collabora.com>

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

> > ---
> > 
> >  src/gstreamer/gstlibcameraprovider.cpp | 14 +++++++++++++-
> >  1 file changed, 13 insertions(+), 1 deletion(-)
> > 
> > diff --git a/src/gstreamer/gstlibcameraprovider.cpp b/src/gstreamer/gstlibcameraprovider.cpp
> > index aee6f9a2be2..6eb0a0eb0c4 100644
> > --- a/src/gstreamer/gstlibcameraprovider.cpp
> > +++ b/src/gstreamer/gstlibcameraprovider.cpp
> > @@ -132,6 +132,10 @@ gst_libcamera_device_new(const std::shared_ptr<Camera> &camera)
> >  
> >  	roles.push_back(StreamRole::VideoRecording);
> >  	std::unique_ptr<CameraConfiguration> config = camera->generateConfiguration(roles);
> > +	if (!config || config->size() != roles.size()) {
> > +		GST_ERROR("Failed to generate a default configuration for %s", name);
> > +		return nullptr;
> > +	}
> >  
> >  	for (const StreamConfiguration &stream_cfg : *config) {
> >  		GstCaps *sub_caps = gst_libcamera_stream_formats_to_caps(stream_cfg.formats());
> > @@ -189,8 +193,16 @@ gst_libcamera_provider_probe(GstDeviceProvider *provider)
> >  
> >  	for (const std::shared_ptr<Camera> &camera : cm->cameras()) {
> >  		GST_INFO_OBJECT(self, "Found camera '%s'", camera->id().c_str());
> > +
> > +		GstDevice *dev = gst_libcamera_device_new(camera);
> > +		if (!dev) {
> > +			GST_ERROR_OBJECT(self, "Failed to add camera '%s'",
> > +					 camera->id().c_str());
> > +			return nullptr;
> > +		}
> > +
> >  		devices = g_list_append(devices,
> > -					g_object_ref_sink(gst_libcamera_device_new(camera)));
> > +					g_object_ref_sink(dev));
> >  	}
> >  
> >  	return devices;

-- 
Regards,

Laurent Pinchart