[libcamera-devel] [PATCH 3/3] v4l2: camera: Merge getStreamConfig() with open()

[paul.elder at ideasonboard.com]

Hi Laurent,

On Sat, Aug 22, 2020 at 04:46:05PM +0300, Laurent Pinchart wrote:
> The V4L2CameraProxy always calls V4L2Camera::getStreamConfig() right
> after V4L2Camera::open(), and never afterwards. Simplify the code by
> returning the initial configuration from V4L2Camera::open() and removing
> V4L2Camera::getStreamConfig().
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

Reviewed-by: Paul Elder <paul.elder at ideasonboard.com>

> ---
>  src/v4l2/v4l2_camera.cpp       | 8 ++------
>  src/v4l2/v4l2_camera.h         | 4 ++--
>  src/v4l2/v4l2_camera_proxy.cpp | 3 +--
>  3 files changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/src/v4l2/v4l2_camera.cpp b/src/v4l2/v4l2_camera.cpp
> index 61bca0732447..24805d5f3c3f 100644
> --- a/src/v4l2/v4l2_camera.cpp
> +++ b/src/v4l2/v4l2_camera.cpp
> @@ -28,7 +28,7 @@ V4L2Camera::~V4L2Camera()
>  	close();
>  }
>  
> -int V4L2Camera::open()
> +int V4L2Camera::open(StreamConfiguration *streamConfig)
>  {
>  	if (camera_->acquire() < 0) {
>  		LOG(V4L2Compat, Error) << "Failed to acquire camera";
> @@ -43,6 +43,7 @@ int V4L2Camera::open()
>  
>  	bufferAllocator_ = new FrameBufferAllocator(camera_);
>  
> +	*streamConfig = config_->at(0);
>  	return 0;
>  }
>  
> @@ -64,11 +65,6 @@ void V4L2Camera::unbind()
>  	efd_ = -1;
>  }
>  
> -void V4L2Camera::getStreamConfig(StreamConfiguration *streamConfig)
> -{
> -	*streamConfig = config_->at(0);
> -}
> -
>  std::vector<V4L2Camera::Buffer> V4L2Camera::completedBuffers()
>  {
>  	std::vector<Buffer> v;
> diff --git a/src/v4l2/v4l2_camera.h b/src/v4l2/v4l2_camera.h
> index be6c4e187363..1fc5ebefef6a 100644
> --- a/src/v4l2/v4l2_camera.h
> +++ b/src/v4l2/v4l2_camera.h
> @@ -37,11 +37,11 @@ public:
>  	V4L2Camera(std::shared_ptr<Camera> camera);
>  	~V4L2Camera();
>  
> -	int open();
> +	int open(StreamConfiguration *streamConfig);
>  	void close();
>  	void bind(int efd);
>  	void unbind();
> -	void getStreamConfig(StreamConfiguration *streamConfig);
> +
>  	std::vector<Buffer> completedBuffers();
>  
>  	int configure(StreamConfiguration *streamConfigOut,
> diff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp
> index 80287d8f164e..8ff990f68fcd 100644
> --- a/src/v4l2/v4l2_camera_proxy.cpp
> +++ b/src/v4l2/v4l2_camera_proxy.cpp
> @@ -63,13 +63,12 @@ int V4L2CameraProxy::open(V4L2CameraFile *file)
>  	 * with count = 0.
>  	 */
>  
> -	int ret = vcam_->open();
> +	int ret = vcam_->open(&streamConfig_);
>  	if (ret < 0) {
>  		refcount_--;
>  		return ret;
>  	}
>  
> -	vcam_->getStreamConfig(&streamConfig_);
>  	setFmtFromConfig(streamConfig_);
>  
>  	files_.insert(file);
> -- 
> Regards,
> 
> Laurent Pinchart
> 
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